Merge branch 'master' into ahtisham/INF-867

* fix: editedBy and closedBy banner will be visible to global staff

* refactor: rename isAdmin to userIsGlobalStaff

src/components/FilterBar.jsx

@@ -120,28 +120,27 @@ function FilterBar({
           <div className="d-flex flex-row py-2 justify-content-between">
             {filters.map((value) => (
               <Form.RadioSet
+                key={value.name}
                 name={value.name}
                 className="d-flex flex-column list-group list-group-flush"
                 value={selectedFilters[value.name]}
                 onChange={onFilterChange}
               >
-                {
-                  value.filters.map(filterName => {
-                    const element = allFilters.find(obj => obj.id === filterName);
-                    if (element) {
-                      return (
-                        <ActionItem
-                          id={element.id}
-                          label={element.label}
-                          value={element.value}
-                          selected={selectedFilters[value.name]}
-                        />
-                      );
-                    }
-                    return false;
-                  })
-                }
-
+                {value.filters.map(filterName => {
+                  const element = allFilters.find(obj => obj.id === filterName);
+                  if (element) {
+                    return (
+                      <ActionItem
+                        key={element.id}
+                        id={element.id}
+                        label={element.label}
+                        value={element.value}
+                        selected={selectedFilters[value.name]}
+                      />
+                    );
+                  }
+                  return false;
+                })}
               </Form.RadioSet>
             ))}
           </div>

src/components/NavigationBar/data/api.js

@@ -2,7 +2,7 @@
 import { camelCaseObject } from '@edx/frontend-platform';
 import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
 
-import { API_BASE_URL } from '../../../data/constants';
+import { getApiBaseUrl } from '../../../data/constants';
 
 function normalizeCourseHomeCourseMetadata(metadata, rootSlug) {
   const data = camelCaseObject(metadata);
@@ -21,7 +21,7 @@ function normalizeCourseHomeCourseMetadata(metadata, rootSlug) {
 }
 
 export async function getCourseHomeCourseMetadata(courseId, rootSlug) {
-  const url = `${API_BASE_URL}/api/course_home/course_metadata/${courseId}`;
+  const url = `${getApiBaseUrl()}/api/course_home/course_metadata/${courseId}`;
   // don't know the context of adding timezone in url. hence omitting it
   // url = appendBrowserTimezoneToUrl(url);
   const { data } = await getAuthenticatedHttpClient().get(url);

src/components/NavigationBar/data/selectors.js

@@ -0,0 +1,3 @@
+/* eslint-disable import/prefer-default-export */
+
+export const selectCourseTabs = state => state.courseTabs;

src/components/PostPreviewPane.jsx

@@ -37,9 +37,10 @@ function PostPreviewPane({
         && (
           <Button
             variant="link"
-            size="md"
+            size="sm"
             onClick={() => setShowPreviewPane(true)}
-            className={`text-primary-500 px-0 ${editExisting && 'mb-4.5'}`}
+            className={`text-primary-500 p-0 ${editExisting && 'mb-4.5'}`}
+            style={{ lineHeight: '26px' }}
           >
             {intl.formatMessage(messages.showPreviewButton)}
           </Button>

src/components/TinyMCEEditor.jsx

@@ -32,6 +32,7 @@ import 'tinymce/plugins/lists';
 import 'tinymce/plugins/emoticons';
 import 'tinymce/plugins/emoticons/js/emojis';
 import 'tinymce/plugins/charmap';
+import 'tinymce/plugins/paste';
 /* eslint import/no-webpack-loader-syntax: off */
 // eslint-disable-next-line import/no-unresolved
 import edxBrandCss from '!!raw-loader!sass-loader!../index.scss';
@@ -100,12 +101,13 @@ export default function TinyMCEEditor(props) {
           skin: false,
           menubar: false,
           branding: false,
+          paste_data_images: false,
           contextmenu: false,
           browser_spellcheck: true,
           a11y_advanced_options: true,
           autosave_interval: '1s',
           autosave_restore_when_empty: false,
-          plugins: 'autoresize autosave codesample link lists image imagetools code emoticons charmap',
+          plugins: 'autoresize autosave codesample link lists image imagetools code emoticons charmap paste',
           toolbar: 'undo redo'
                       + ' | formatselect | bold italic underline'
                       + ' | link blockquote openedx_code image'
@@ -117,6 +119,7 @@ export default function TinyMCEEditor(props) {
           content_css: false,
           content_style: contentStyle,
           body_class: 'm-2 text-editor',
+          relative_urls: false,
           default_link_target: '_blank',
           target_list: false,
           images_upload_handler: uploadHandler,

src/data/api.js

@@ -1,9 +1,9 @@
 /* eslint-disable import/prefer-default-export */
 import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
 
-import { API_BASE_URL } from './constants';
+import { getApiBaseUrl } from './constants';
 
-export const blocksAPIURL = `${API_BASE_URL}/api/courses/v1/blocks/`;
+export const getBlocksAPIURL = () => `${getApiBaseUrl()}/api/courses/v1/blocks/`;
 export async function getCourseBlocks(courseId, username) {
   const params = {
     course_id: courseId,
@@ -14,6 +14,6 @@ export async function getCourseBlocks(courseId, username) {
     student_view_data: 'discussion',
   };
   const { data } = await getAuthenticatedHttpClient()
-    .get(blocksAPIURL, { params });
+    .get(getBlocksAPIURL(), { params });
   return data;
 }

src/data/constants.js

@@ -1,6 +1,6 @@
 import { getConfig } from '@edx/frontend-platform';
 
-export const API_BASE_URL = getConfig().LMS_BASE_URL;
+export const getApiBaseUrl = () => getConfig().LMS_BASE_URL;
 
 /**
  * Enum for thread types.
@@ -190,6 +190,8 @@ export const Routes = {
     CATEGORY: `${BASE_PATH}/category/:category`,
     CATEGORY_POST: `${BASE_PATH}/category/:category/posts/:postId`,
     TOPIC: `${BASE_PATH}/topics/:topicId`,
+    TOPIC_POST: `${BASE_PATH}/topics/:topicId/posts/:postId`,
+    TOPIC_POST_EDIT: `${BASE_PATH}/topics/:topicId/posts/:postId/edit`,
   },
 };
 

src/data/redux.test.js

@@ -7,10 +7,11 @@ import { initializeMockApp } from '@edx/frontend-platform/testing';
 import { initializeStore } from '../store';
 import { executeThunk } from '../test-utils';
 import { getBlocksAPIResponse } from './__factories__';
-import { blocksAPIURL } from './api';
+import { getBlocksAPIURL } from './api';
 import { RequestStatus } from './constants';
 import { fetchCourseBlocks } from './thunks';
 
+const blocksAPIURL = getBlocksAPIURL();
 const courseId = 'course-v1:edX+DemoX+Demo_Course';
 
 let axiosMock;

src/data/selectors.js

@@ -38,12 +38,6 @@ export const selectTopicsUnderCategory = createSelector(
   ),
 );
 
-export const selectSequences = createSelector(
-  selectChapters,
-  selectBlocks,
-  (chapterIds, blocks) => chapterIds?.flatMap(cId => blocks[cId].children.map(seqId => blocks[seqId])) || [],
-);
-
 export const selectArchivedTopics = createSelector(
   state => state.topics.topics,
   state => state.topics.archivedIds || [],

src/discussions/cohorts/data/api.js

@@ -6,9 +6,7 @@ ensureConfig([
   'LMS_BASE_URL',
 ], 'Comments API service');
 
-const apiBaseUrl = getConfig().LMS_BASE_URL;
-
-export const getCohortsApiUrl = courseId => `${apiBaseUrl}/api/cohorts/v1/courses/${courseId}/cohorts/`;
+export const getCohortsApiUrl = courseId => `${getConfig().LMS_BASE_URL}/api/cohorts/v1/courses/${courseId}/cohorts/`;
 
 export async function getCourseCohorts(courseId) {
   const params = snakeCaseObject({ courseId });

src/discussions/comments/CommentsView.jsx

@@ -18,6 +18,7 @@ import {
 import { useDispatchWithState } from '../../data/hooks';
 import { DiscussionContext } from '../common/context';
 import { useIsOnDesktop } from '../data/hooks';
+import { EmptyPage } from '../empty-posts';
 import { Post } from '../posts';
 import { selectThread } from '../posts/data/selectors';
 import { fetchThread, markThreadAsRead } from '../posts/data/thunks';
@@ -76,47 +77,65 @@ function DiscussionCommentsView({
     isLoading,
     handleLoadMoreResponses,
   } = usePostComments(postId, endorsed);
-  const sortedComments = useMemo(() => [...filterPosts(comments, 'endorsed'),
-    ...filterPosts(comments, 'unendorsed')], [comments]);
 
+  const endorsedComments = useMemo(() => [...filterPosts(comments, 'endorsed')], [comments]);
+  const unEndorsedComments = useMemo(() => [...filterPosts(comments, 'unendorsed')], [comments]);
+
+  const handleDefinition = (message, commentsLength) => (
+    <div className="mx-4 text-primary-700" role="heading" aria-level="2" style={{ lineHeight: '28px' }}>
+      {intl.formatMessage(message, { num: commentsLength })}
+    </div>
+  );
+
+  const handleComments = (postComments, showAddResponse = false, showLoadMoreResponses = false) => (
+    <div className="mx-4" role="list">
+      {postComments.map(comment => (
+        <Comment comment={comment} key={comment.id} postType={postType} isClosedPost={isClosed} />
+      ))}
+      {hasMorePages && !isLoading && !showLoadMoreResponses && (
+        <Button
+          onClick={handleLoadMoreResponses}
+          variant="link"
+          block="true"
+          className="card p-4 mb-4 font-weight-500 font-size-14"
+          style={{
+            lineHeight: '20px',
+          }}
+          data-testid="load-more-comments"
+        >
+          {intl.formatMessage(messages.loadMoreResponses)}
+        </Button>
+      )}
+      {isLoading && !showLoadMoreResponses && (
+        <div className="card my-4 p-4 d-flex align-items-center">
+          <Spinner animation="border" variant="primary" />
+        </div>
+      )}
+      {!!postComments.length && !isClosed && showAddResponse
+        && <ResponseEditor postId={postId} addWrappingDiv />}
+    </div>
+  );
   return (
     <>
-      {((hasMorePages && isLoading) || !isLoading)
-      && (
-      <div className="mx-4 text-primary-700" role="heading" aria-level="2" style={{ lineHeight: '28px' }}>
-        {endorsed === EndorsementStatus.ENDORSED
-          ? intl.formatMessage(messages.endorsedResponseCount, { num: sortedComments.length })
-          : intl.formatMessage(messages.responseCount, { num: sortedComments.length })}
-      </div>
+      {((hasMorePages && isLoading) || !isLoading) && (
+        <>
+          {endorsedComments.length > 0 && (
+            <>
+              {handleDefinition(messages.endorsedResponseCount, endorsedComments.length)}
+              {endorsed === EndorsementStatus.DISCUSSION
+                ? handleComments(endorsedComments, false, true)
+                : handleComments(endorsedComments)}
+            </>
+          )}
+          {endorsed !== EndorsementStatus.ENDORSED && (
+            <>
+              {handleDefinition(messages.responseCount, unEndorsedComments.length)}
+              {unEndorsedComments.length === 0 && <br />}
+              {handleComments(unEndorsedComments, true)}
+            </>
+          )}
+        </>
       )}
-
-      <div className="mx-4" role="list">
-        {sortedComments.map(comment => (
-          <Comment comment={comment} key={comment.id} postType={postType} isClosedPost={isClosed} />
-        ))}
-        {hasMorePages && !isLoading && (
-          <Button
-            onClick={handleLoadMoreResponses}
-            variant="link"
-            block="true"
-            className="card p-4 mb-4 font-weight-500 font-size-14"
-            style={{
-              lineHeight: '20px',
-            }}
-            data-testid="load-more-comments"
-          >
-            {intl.formatMessage(messages.loadMoreResponses)}
-          </Button>
-        )}
-        {isLoading
-        && (
-          <div className="card my-4 p-4 d-flex align-items-center">
-            <Spinner animation="border" variant="primary" />
-          </div>
-        )}
-        {!!sortedComments.length && !isClosed
-          && <ResponseEditor postId={postId} addWrappingDiv />}
-      </div>
     </>
 
   );
@@ -133,18 +152,26 @@ DiscussionCommentsView.propTypes = {
 };
 
 function CommentsView({ intl }) {
+  const [isLoading, submitDispatch] = useDispatchWithState();
   const { postId } = useParams();
   const thread = usePost(postId);
-  const dispatch = useDispatch();
   const history = useHistory();
   const location = useLocation();
   const isOnDesktop = useIsOnDesktop();
   const {
-    courseId, learnerUsername, category, topicId, page, inContext,
+    courseId, learnerUsername, category, topicId, page, enableInContextSidebar,
   } = useContext(DiscussionContext);
 
+  useEffect(() => {
+    if (!thread) { submitDispatch(fetchThread(postId, courseId, true)); }
+  }, [postId]);
+
   if (!thread) {
-    dispatch(fetchThread(postId, true));
+    if (!isLoading) {
+      return (
+        <EmptyPage title={intl.formatMessage(messages.noThreadFound)} />
+      );
+    }
     return (
       <Spinner animation="border" variant="primary" data-testid="loading-indicator" />
     );
@@ -153,7 +180,7 @@ function CommentsView({ intl }) {
   return (
     <>
       {!isOnDesktop && (
-        inContext ? (
+        enableInContextSidebar ? (
           <>
             <div className="px-4 py-1.5 bg-white">
               <Button
@@ -185,12 +212,12 @@ function CommentsView({ intl }) {
         )
       )}
       <div className={classNames('discussion-comments d-flex flex-column card', {
-        'm-4 p-4.5': !inContext,
-        'p-4 rounded-0 border-0 mb-4': inContext,
+        'm-4 p-4.5': !enableInContextSidebar,
+        'p-4 rounded-0 border-0 mb-4': enableInContextSidebar,
       })}
       >
         <Post post={thread} />
-        {!thread.closed && <ResponseEditor postId={postId} /> }
+        {!thread.closed && <ResponseEditor postId={postId} />}
       </div>
       {thread.type === ThreadType.DISCUSSION && (
         <DiscussionCommentsView

src/discussions/comments/CommentsView.test.jsx

@@ -13,16 +13,19 @@ import { AppProvider } from '@edx/frontend-platform/react';
 import { initializeStore } from '../../store';
 import { executeThunk } from '../../test-utils';
 import { DiscussionContext } from '../common/context';
-import { courseConfigApiUrl } from '../data/api';
+import { getCourseConfigApiUrl } from '../data/api';
 import { fetchCourseConfig } from '../data/thunks';
 import DiscussionContent from '../discussions-home/DiscussionContent';
-import { threadsApiUrl } from '../posts/data/api';
+import { getThreadsApiUrl } from '../posts/data/api';
 import { fetchThreads } from '../posts/data/thunks';
-import { commentsApiUrl } from './data/api';
+import { getCommentsApiUrl } from './data/api';
 
 import '../posts/data/__factories__';
 import './data/__factories__';
 
+const courseConfigApiUrl = getCourseConfigApiUrl();
+const commentsApiUrl = getCommentsApiUrl();
+const threadsApiUrl = getThreadsApiUrl();
 const discussionPostId = 'thread-1';
 const questionPostId = 'thread-2';
 const closedPostId = 'thread-2';
@@ -102,7 +105,7 @@ function renderComponent(postId) {
 }
 
 describe('CommentsView', () => {
-  beforeEach(async () => {
+  beforeEach(() => {
     initializeMockApp({
       authenticatedUser: {
         userId: 3,
@@ -147,7 +150,7 @@ describe('CommentsView', () => {
         )];
       });
 
-    await executeThunk(fetchThreads(courseId), store.dispatch, store.getState);
+    executeThunk(fetchThreads(courseId), store.dispatch, store.getState);
     mockAxiosReturnPagedComments();
     mockAxiosReturnPagedCommentsResponses();
   });
@@ -381,6 +384,7 @@ describe('CommentsView', () => {
       });
       expect(testLocation.pathname).toBe(`/${courseId}/posts/${discussionPostId}/edit`);
     });
+
     it('should allow pinning the post', async () => {
       renderComponent(discussionPostId);
       await act(async () => {
@@ -394,6 +398,7 @@ describe('CommentsView', () => {
       });
       assertLastUpdateData({ pinned: false });
     });
+
     it('should allow reporting the post', async () => {
       renderComponent(discussionPostId);
       await act(async () => {
@@ -405,6 +410,11 @@ describe('CommentsView', () => {
       await act(async () => {
         fireEvent.click(screen.getByRole('button', { name: /report/i }));
       });
+      expect(screen.queryByRole('dialog', { name: /Report \w+/i, exact: false })).toBeInTheDocument();
+      await act(async () => {
+        fireEvent.click(screen.queryByRole('button', { name: /Confirm/i }));
+      });
+      expect(screen.queryByRole('dialog', { name: /Report \w+/i, exact: false })).not.toBeInTheDocument();
       assertLastUpdateData({ abuse_flagged: true });
     });
 
@@ -423,12 +433,8 @@ describe('CommentsView', () => {
       expect(JSON.parse(axiosMock.history.patch[1].data)).toMatchObject({ voted: true });
     });
 
-    it.each([
-      ['endorsing comments', 'Endorse', { endorsed: true }],
-      ['reporting comments', 'Report', { abuse_flagged: true }],
-    ])('handles %s', async (label, buttonLabel, patchData) => {
+    it('handles endorsing comments', async () => {
       renderComponent(discussionPostId);
-
       // Wait for the content to load
       await screen.findByText('comment number 7', { exact: false });
 
@@ -438,20 +444,45 @@ describe('CommentsView', () => {
       await act(async () => {
         fireEvent.click(actionButtons[1]);
       });
+
       await act(async () => {
-        fireEvent.click(screen.getByRole('button', { name: buttonLabel }));
+        fireEvent.click(screen.getByRole('button', { name: /Endorse/i }));
       });
       expect(axiosMock.history.patch).toHaveLength(2);
-      expect(JSON.parse(axiosMock.history.patch[1].data)).toMatchObject(patchData);
+      expect(JSON.parse(axiosMock.history.patch[1].data)).toMatchObject({ endorsed: true });
+    });
+
+    it('handles reporting comments', async () => {
+      renderComponent(discussionPostId);
+      // Wait for the content to load
+      await screen.findByText('comment number 7', { exact: false });
+
+      // There should be three buttons, one for the post, the second for the
+      // comment and the third for a response to that comment
+      const actionButtons = screen.queryAllByRole('button', { name: /actions menu/i });
+      await act(async () => {
+        fireEvent.click(actionButtons[1]);
+      });
+
+      await act(async () => {
+        fireEvent.click(screen.getByRole('button', { name: /Report/i }));
+      });
+      expect(screen.queryByRole('dialog', { name: /Report \w+/i, exact: false })).toBeInTheDocument();
+      await act(async () => {
+        fireEvent.click(screen.queryByRole('button', { name: /Confirm/i }));
+      });
+      expect(screen.queryByRole('dialog', { name: /Report \w+/i, exact: false })).not.toBeInTheDocument();
+      expect(axiosMock.history.patch).toHaveLength(2);
+      expect(JSON.parse(axiosMock.history.patch[1].data)).toMatchObject({ abuse_flagged: true });
     });
   });
 
   describe('for discussion thread', () => {
     const findLoadMoreCommentsButton = () => screen.findByTestId('load-more-comments');
 
-    it('shown spinner when post isn\'t loaded', async () => {
+    it('shown post not found when post id does not belong to course', async () => {
       renderComponent('unloaded-id');
-      expect(await screen.findByTestId('loading-indicator'))
+      expect(await screen.findByText('Thread not found', { exact: true }))
         .toBeInTheDocument();
     });
 
@@ -624,12 +655,8 @@ describe('CommentsView', () => {
       expect(JSON.parse(axiosMock.history.patch[1].data)).toMatchObject({ voted: true });
     });
 
-    it.each([
-      ['endorsing comments', 'Endorse', { endorsed: true }],
-      ['reporting comments', 'Report', { abuse_flagged: true }],
-    ])('handles %s', async (label, buttonLabel, patchData) => {
+    it('handles endorsing comments', async () => {
       renderComponent(discussionPostId);
-
       // Wait for the content to load
       await screen.findByText('comment number 7', { exact: false });
 
@@ -639,11 +666,36 @@ describe('CommentsView', () => {
       await act(async () => {
         fireEvent.click(actionButtons[1]);
       });
+
       await act(async () => {
-        fireEvent.click(screen.getByRole('button', { name: buttonLabel }));
+        fireEvent.click(screen.getByRole('button', { name: /Endorse/i }));
       });
       expect(axiosMock.history.patch).toHaveLength(2);
-      expect(JSON.parse(axiosMock.history.patch[1].data)).toMatchObject(patchData);
+      expect(JSON.parse(axiosMock.history.patch[1].data)).toMatchObject({ endorsed: true });
+    });
+
+    it('handles reporting comments', async () => {
+      renderComponent(discussionPostId);
+      // Wait for the content to load
+      await screen.findByText('comment number 7', { exact: false });
+
+      // There should be three buttons, one for the post, the second for the
+      // comment and the third for a response to that comment
+      const actionButtons = screen.queryAllByRole('button', { name: /actions menu/i });
+      await act(async () => {
+        fireEvent.click(actionButtons[1]);
+      });
+
+      await act(async () => {
+        fireEvent.click(screen.getByRole('button', { name: /Report/i }));
+      });
+      expect(screen.queryByRole('dialog', { name: /Report \w+/i, exact: false })).toBeInTheDocument();
+      await act(async () => {
+        fireEvent.click(screen.queryByRole('button', { name: /Confirm/i }));
+      });
+      expect(screen.queryByRole('dialog', { name: /Report \w+/i, exact: false })).not.toBeInTheDocument();
+      expect(axiosMock.history.patch).toHaveLength(2);
+      expect(JSON.parse(axiosMock.history.patch[1].data)).toMatchObject({ abuse_flagged: true });
     });
   });
 

src/discussions/comments/comment/Comment.jsx

@@ -1,4 +1,4 @@
-import React, { useEffect, useState } from 'react';
+import React, { useContext, useEffect, useState } from 'react';
 import PropTypes from 'prop-types';
 
 import classNames from 'classnames';
@@ -9,10 +9,10 @@ import { Button, useToggle } from '@edx/paragon';
 
 import HTMLLoader from '../../../components/HTMLLoader';
 import { ContentActions } from '../../../data/constants';
-import { AlertBanner, DeleteConfirmation, EndorsedAlertBanner } from '../../common';
-import { selectBlackoutDate } from '../../data/selectors';
+import { AlertBanner, Confirmation, EndorsedAlertBanner } from '../../common';
+import { DiscussionContext } from '../../common/context';
+import { useUserCanAddThreadInBlackoutDate } from '../../data/hooks';
 import { fetchThread } from '../../posts/data/thunks';
-import { inBlackoutDateRange } from '../../utils';
 import CommentIcons from '../comment-icons/CommentIcons';
 import { selectCommentCurrentPage, selectCommentHasMorePages, selectCommentResponses } from '../data/selectors';
 import { editComment, fetchCommentResponses, removeComment } from '../data/thunks';
@@ -35,11 +35,14 @@ function Comment({
   const inlineReplies = useSelector(selectCommentResponses(comment.id));
   const [isEditing, setEditing] = useState(false);
   const [isDeleting, showDeleteConfirmation, hideDeleteConfirmation] = useToggle(false);
+  const [isReporting, showReportConfirmation, hideReportConfirmation] = useToggle(false);
   const [isReplying, setReplying] = useState(false);
   const hasMorePages = useSelector(selectCommentHasMorePages(comment.id));
   const currentPage = useSelector(selectCommentCurrentPage(comment.id));
-  const blackoutDateRange = useSelector(selectBlackoutDate);
-
+  const userCanAddThreadInBlackoutDate = useUserCanAddThreadInBlackoutDate();
+  const {
+    courseId,
+  } = useContext(DiscussionContext);
   useEffect(() => {
     // If the comment has a parent comment, it won't have any children, so don't fetch them.
     if (hasChildren && !currentPage && showFullThread) {
@@ -47,14 +50,32 @@ function Comment({
     }
   }, [comment.id]);
 
+  const handleAbusedFlag = () => {
+    if (comment.abuseFlagged) {
+      dispatch(editComment(comment.id, { flagged: !comment.abuseFlagged }));
+    } else {
+      showReportConfirmation();
+    }
+  };
+
+  const handleDeleteConfirmation = () => {
+    dispatch(removeComment(comment.id));
+    hideDeleteConfirmation();
+  };
+
+  const handleReportConfirmation = () => {
+    dispatch(editComment(comment.id, { flagged: !comment.abuseFlagged }));
+    hideReportConfirmation();
+  };
+
   const actionHandlers = {
     [ContentActions.EDIT_CONTENT]: () => setEditing(true),
     [ContentActions.ENDORSE]: async () => {
       await dispatch(editComment(comment.id, { endorsed: !comment.endorsed }, ContentActions.ENDORSE));
-      await dispatch(fetchThread(comment.threadId));
+      await dispatch(fetchThread(comment.threadId, courseId));
     },
     [ContentActions.DELETE]: showDeleteConfirmation,
-    [ContentActions.REPORT]: () => dispatch(editComment(comment.id, { flagged: !comment.abuseFlagged })),
+    [ContentActions.REPORT]: () => handleAbusedFlag(),
   };
 
   const handleLoadMoreComments = () => (
@@ -64,16 +85,25 @@ function Comment({
   return (
     <div className={classNames({ 'py-2 my-3': showFullThread })}>
       <div className="d-flex flex-column card" data-testid={`comment-${comment.id}`} role="listitem">
-        <DeleteConfirmation
+        <Confirmation
           isOpen={isDeleting}
           title={intl.formatMessage(messages.deleteResponseTitle)}
           description={intl.formatMessage(messages.deleteResponseDescription)}
           onClose={hideDeleteConfirmation}
-          onDelete={() => {
-            dispatch(removeComment(comment.id));
-            hideDeleteConfirmation();
-          }}
+          comfirmAction={handleDeleteConfirmation}
+          closeButtonVaraint="tertiary"
+          confirmButtonText={intl.formatMessage(messages.deleteConfirmationDelete)}
         />
+        {!comment.abuseFlagged && (
+          <Confirmation
+            isOpen={isReporting}
+            title={intl.formatMessage(messages.reportResponseTitle)}
+            description={intl.formatMessage(messages.reportResponseDescription)}
+            onClose={hideReportConfirmation}
+            comfirmAction={handleReportConfirmation}
+            confirmButtonVariant="danger"
+          />
+        )}
         <EndorsedAlertBanner postType={postType} content={comment} />
         <div className="d-flex flex-column p-4.5">
           <AlertBanner content={comment} />
@@ -127,18 +157,18 @@ function Comment({
               />
             ) : (
               <>
-                {(!isClosedPost && !inBlackoutDateRange(blackoutDateRange))
+                {!isClosedPost && userCanAddThreadInBlackoutDate
                   && (
-                    <Button
-                      className="d-flex flex-grow mt-3 py-2 font-size-14"
-                      variant="outline-primary"
-                      style={{
-                        lineHeight: '20px',
-                      }}
-                      onClick={() => setReplying(true)}
-                    >
-                      {intl.formatMessage(messages.addComment)}
-                    </Button>
+                  <Button
+                    className="d-flex flex-grow mt-3 py-2 font-size-14"
+                    variant="outline-primary"
+                    style={{
+                      lineHeight: '20px',
+                    }}
+                    onClick={() => setReplying(true)}
+                  >
+                    {intl.formatMessage(messages.addComment)}
+                  </Button>
                   )}
               </>
 

src/discussions/comments/comment/CommentHeader.jsx

@@ -66,19 +66,15 @@ function CommentHeader({
       <div className="d-flex align-items-center">
 
         {actionIcons && (
-        <span className="btn-icon btn-icon-sm mr-1 align-items-center">
-          <Icon
-            data-testid="check-icon"
-            onClick={
-                () => {
-                  handleIcons(actionIcons.action);
-                }
-              }
-            src={actionIcons.icon}
-            className={['endorse', 'unendorse'].includes(actionIcons.id) ? 'text-dark-500' : 'text-success-500'}
-            size="sm"
-          />
-        </span>
+          <span className="btn-icon btn-icon-sm mr-1 align-items-center pointer-cursor-hover">
+            <Icon
+              data-testid="check-icon"
+              onClick={() => handleIcons(actionIcons.action)}
+              src={actionIcons.icon}
+              className={['endorse', 'unendorse'].includes(actionIcons.id) ? 'text-dark-500' : 'text-success-500'}
+              size="sm"
+            />
+          </span>
         )}
 
         <ActionsDropdown

src/discussions/comments/comment/Reply.jsx

@@ -10,7 +10,7 @@ import { Avatar, useToggle } from '@edx/paragon';
 import HTMLLoader from '../../../components/HTMLLoader';
 import { AvatarOutlineAndLabelColors, ContentActions } from '../../../data/constants';
 import {
-  ActionsDropdown, AlertBanner, AuthorLabel, DeleteConfirmation,
+  ActionsDropdown, AlertBanner, AuthorLabel, Confirmation,
 } from '../../common';
 import timeLocale from '../../common/time-locale';
 import { useAlertBannerVisible } from '../../data/hooks';
@@ -29,6 +29,26 @@ function Reply({
   const dispatch = useDispatch();
   const [isEditing, setEditing] = useState(false);
   const [isDeleting, showDeleteConfirmation, hideDeleteConfirmation] = useToggle(false);
+  const [isReporting, showReportConfirmation, hideReportConfirmation] = useToggle(false);
+
+  const handleAbusedFlag = () => {
+    if (reply.abuseFlagged) {
+      dispatch(editComment(reply.id, { flagged: !reply.abuseFlagged }));
+    } else {
+      showReportConfirmation();
+    }
+  };
+
+  const handleDeleteConfirmation = () => {
+    dispatch(removeComment(reply.id));
+    hideDeleteConfirmation();
+  };
+
+  const handleReportConfirmation = () => {
+    dispatch(editComment(reply.id, { flagged: !reply.abuseFlagged }));
+    hideReportConfirmation();
+  };
+
   const actionHandlers = {
     [ContentActions.EDIT_CONTENT]: () => setEditing(true),
     [ContentActions.ENDORSE]: () => dispatch(editComment(
@@ -37,7 +57,7 @@ function Reply({
       ContentActions.ENDORSE,
     )),
     [ContentActions.DELETE]: showDeleteConfirmation,
-    [ContentActions.REPORT]: () => dispatch(editComment(reply.id, { flagged: !reply.abuseFlagged })),
+    [ContentActions.REPORT]: () => handleAbusedFlag(),
   };
   const authorAvatars = useSelector(selectAuthorAvatars(reply.author));
   const colorClass = AvatarOutlineAndLabelColors[reply.authorLabel];
@@ -45,17 +65,25 @@ function Reply({
 
   return (
     <div className="d-flex flex-column mt-4.5" data-testid={`reply-${reply.id}`} role="listitem">
-      <DeleteConfirmation
+      <Confirmation
         isOpen={isDeleting}
         title={intl.formatMessage(messages.deleteCommentTitle)}
         description={intl.formatMessage(messages.deleteCommentDescription)}
         onClose={hideDeleteConfirmation}
-        onDelete={() => {
-          dispatch(removeComment(reply.id));
-          hideDeleteConfirmation();
-        }}
+        comfirmAction={handleDeleteConfirmation}
+        closeButtonVaraint="tertiary"
+        confirmButtonText={intl.formatMessage(messages.deleteConfirmationDelete)}
       />
-
+      {!reply.abuseFlagged && (
+        <Confirmation
+          isOpen={isReporting}
+          title={intl.formatMessage(messages.reportCommentTitle)}
+          description={intl.formatMessage(messages.reportCommentDescription)}
+          onClose={hideReportConfirmation}
+          comfirmAction={handleReportConfirmation}
+          confirmButtonVariant="danger"
+        />
+      )}
       {hasAnyAlert && (
         <div className="d-flex">
           <div className="d-flex invisible">
@@ -85,13 +113,15 @@ function Reply({
         >
           <div className="d-flex flex-row justify-content-between align-items-center mb-0.5">
             <AuthorLabel author={reply.author} authorLabel={reply.authorLabel} labelColor={colorClass && `text-${colorClass}`} linkToProfile />
-            <ActionsDropdown
-              commentOrPost={{
-                ...reply,
-                postType,
-              }}
-              actionHandlers={actionHandlers}
-            />
+            <div className="ml-auto d-flex">
+              <ActionsDropdown
+                commentOrPost={{
+                  ...reply,
+                  postType,
+                }}
+                actionHandlers={actionHandlers}
+              />
+            </div>
           </div>
           {isEditing
             ? <CommentEditor comment={reply} onCloseEditor={() => setEditing(false)} />

src/discussions/comments/comment/ResponseEditor.jsx

@@ -2,14 +2,12 @@ import React, { useContext, useEffect, useState } from 'react';
 import PropTypes from 'prop-types';
 
 import classNames from 'classnames';
-import { useSelector } from 'react-redux';
 
 import { injectIntl, intlShape } from '@edx/frontend-platform/i18n';
 import { Button } from '@edx/paragon';
 
 import { DiscussionContext } from '../../common/context';
-import { selectBlackoutDate } from '../../data/selectors';
-import { inBlackoutDateRange } from '../../utils';
+import { useUserCanAddThreadInBlackoutDate } from '../../data/hooks';
 import messages from '../messages';
 import CommentEditor from './CommentEditor';
 
@@ -18,15 +16,14 @@ function ResponseEditor({
   intl,
   addWrappingDiv,
 }) {
-  const { inContext } = useContext(DiscussionContext);
+  const { enableInContextSidebar } = useContext(DiscussionContext);
   const [addingResponse, setAddingResponse] = useState(false);
+  const userCanAddThreadInBlackoutDate = useUserCanAddThreadInBlackoutDate();
 
   useEffect(() => {
     setAddingResponse(false);
   }, [postId]);
 
-  const blackoutDateRange = useSelector(selectBlackoutDate);
-
   return addingResponse
     ? (
       <div className={classNames({ 'bg-white p-4 mb-4 rounded': addWrappingDiv })}>
@@ -37,11 +34,11 @@ function ResponseEditor({
         />
       </div>
     )
-    : !inBlackoutDateRange(blackoutDateRange) && (
+    : userCanAddThreadInBlackoutDate && (
       <div className={classNames({ 'mb-4': addWrappingDiv }, 'actions d-flex')}>
         <Button
           variant="primary"
-          className={classNames('px-2.5 py-2 font-size-14', { 'w-100': inContext })}
+          className={classNames('px-2.5 py-2 font-size-14', { 'w-100': enableInContextSidebar })}
           onClick={() => setAddingResponse(true)}
           style={{
             lineHeight: '20px',

src/discussions/comments/data/api.js

@@ -8,9 +8,7 @@ ensureConfig([
   'LMS_BASE_URL',
 ], 'Comments API service');
 
-const apiBaseUrl = getConfig().LMS_BASE_URL;
-
-export const commentsApiUrl = `${apiBaseUrl}/api/discussion/v1/comments/`;
+export const getCommentsApiUrl = () => `${getConfig().LMS_BASE_URL}/api/discussion/v1/comments/`;
 
 /**
  * Returns all the comments for the specified thread.
@@ -36,7 +34,7 @@ export async function getThreadComments(
   });
 
   const { data } = await getAuthenticatedHttpClient()
-    .get(commentsApiUrl, { params });
+    .get(getCommentsApiUrl(), { params });
   return data;
 }
 
@@ -53,7 +51,7 @@ export async function getCommentResponses(
     pageSize,
   } = {},
 ) {
-  const url = `${commentsApiUrl}${commentId}/`;
+  const url = `${getCommentsApiUrl()}${commentId}/`;
   const params = snakeCaseObject({
     page,
     pageSize,
@@ -73,7 +71,7 @@ export async function getCommentResponses(
  */
 export async function postComment(comment, threadId, parentId = null) {
   const { data } = await getAuthenticatedHttpClient()
-    .post(commentsApiUrl, snakeCaseObject({ threadId, raw_body: comment, parentId }));
+    .post(getCommentsApiUrl(), snakeCaseObject({ threadId, raw_body: comment, parentId }));
   return data;
 }
 
@@ -94,7 +92,7 @@ export async function updateComment(commentId, {
   endorsed,
   editReasonCode,
 }) {
-  const url = `${commentsApiUrl}${commentId}/`;
+  const url = `${getCommentsApiUrl()}${commentId}/`;
   const postData = snakeCaseObject({
     raw_body: comment,
     voted,
@@ -113,7 +111,7 @@ export async function updateComment(commentId, {
  * @param {string} commentId ID of comment to delete
  */
 export async function deleteComment(commentId) {
-  const url = `${commentsApiUrl}${commentId}/`;
+  const url = `${getCommentsApiUrl()}${commentId}/`;
   await getAuthenticatedHttpClient()
     .delete(url);
 }

src/discussions/comments/data/redux.test.js

@@ -7,13 +7,14 @@ import { initializeMockApp } from '@edx/frontend-platform/testing';
 import { EndorsementStatus } from '../../../data/constants';
 import { initializeStore } from '../../../store';
 import { executeThunk } from '../../../test-utils';
-import { commentsApiUrl } from './api';
+import { getCommentsApiUrl } from './api';
 import {
   addComment, editComment, fetchCommentResponses, fetchThreadComments, removeComment,
 } from './thunks';
 
 import './__factories__';
 
+const commentsApiUrl = getCommentsApiUrl();
 let axiosMock;
 let store;
 

src/discussions/comments/messages.js

@@ -148,6 +148,31 @@ const messages = defineMessages({
     defaultMessage: 'Are you sure you want to permanently delete this comment?',
     description: 'Text displayed in confirmation dialog when deleting a comment',
   },
+  deleteConfirmationDelete: {
+    id: 'discussions.delete.confirmation.button.delete',
+    defaultMessage: 'Delete',
+    description: 'Delete button shown on delete confirmation dialog',
+  },
+  reportResponseTitle: {
+    id: 'discussions.editor.response.response.title',
+    defaultMessage: 'Report inappropriate content?',
+    description: 'Title of confirmation dialog shown when reporting a response',
+  },
+  reportResponseDescription: {
+    id: 'discussions.editor.response.description',
+    defaultMessage: 'The discussion moderation team will review this content and take appropriate action.',
+    description: 'Text displayed in confirmation dialog when deleting a response',
+  },
+  reportCommentTitle: {
+    id: 'discussions.editor.report.comment.title',
+    defaultMessage: 'Report inappropriate content?',
+    description: 'Title of confirmation dialog shown when reporting a comment',
+  },
+  reportCommentDescription: {
+    id: 'discussions.editor.report.comment.description',
+    defaultMessage: 'The discussion moderation team will review this content and take appropriate action.',
+    description: 'Text displayed in confirmation dialog when deleting a response',
+  },
   editReasonCode: {
     id: 'discussions.editor.comments.editReasonCode',
     defaultMessage: 'Reason for editing',
@@ -182,6 +207,11 @@ const messages = defineMessages({
     defaultMessage: '{time} ago',
     description: 'Time text for endorse banner',
   },
+  noThreadFound: {
+    id: 'discussion.thread.notFound',
+    defaultMessage: 'Thread not found',
+    description: 'message to show on screen if the request thread is not found in course',
+  },
 });
 
 export default messages;

src/discussions/common/ActionsDropdown.jsx

@@ -27,7 +27,7 @@ function ActionsDropdown({
   const [isOpen, open, close] = useToggle(false);
   const [target, setTarget] = useState(null);
   const actions = useActions(commentOrPost);
-  const { inContext } = useContext(DiscussionContext);
+  const { enableInContextSidebar } = useContext(DiscussionContext);
   const handleActions = (action) => {
     const actionFunction = actionHandlers[action];
     if (actionFunction) {
@@ -52,37 +52,39 @@ function ActionsDropdown({
         size="sm"
         ref={setTarget}
       />
-      <ModalPopup
-        onClose={close}
-        positionRef={target}
-        isOpen={isOpen}
-        placement={inContext ? 'left' : 'auto-start'}
-      >
-        <div
-          className="bg-white p-1 shadow d-flex flex-column"
-          data-testid="actions-dropdown-modal-popup"
+      <div className="actions-dropdown">
+        <ModalPopup
+          onClose={close}
+          positionRef={target}
+          isOpen={isOpen}
+          placement={enableInContextSidebar ? 'left' : 'auto-start'}
         >
-          {actions.map(action => (
-            <React.Fragment key={action.id}>
-              {action.action === ContentActions.DELETE
+          <div
+            className="bg-white p-1 shadow d-flex flex-column"
+            data-testid="actions-dropdown-modal-popup"
+          >
+            {actions.map(action => (
+              <React.Fragment key={action.id}>
+                {(action.action === ContentActions.DELETE)
               && <Dropdown.Divider />}
 
-              <Dropdown.Item
-                as={Button}
-                variant="tertiary"
-                size="inline"
-                onClick={() => {
-                  close();
-                  handleActions(action.action);
-                }}
-                className="d-flex justify-content-start py-1.5 mr-4"
-              >
-                <Icon src={action.icon} className="mr-1" /> {intl.formatMessage(action.label)}
-              </Dropdown.Item>
-            </React.Fragment>
-          ))}
-        </div>
-      </ModalPopup>
+                <Dropdown.Item
+                  as={Button}
+                  variant="tertiary"
+                  size="inline"
+                  onClick={() => {
+                    close();
+                    handleActions(action.action);
+                  }}
+                  className="d-flex justify-content-start py-1.5 mr-4"
+                >
+                  <Icon src={action.icon} className="mr-1" /> {intl.formatMessage(action.label)}
+                </Dropdown.Item>
+              </React.Fragment>
+            ))}
+          </div>
+        </ModalPopup>
+      </div>
     </>
   );
 }

src/discussions/common/AlertBanner.jsx

@@ -6,11 +6,13 @@ import { useSelector } from 'react-redux';
 import { getAuthenticatedUser } from '@edx/frontend-platform/auth';
 import { injectIntl, intlShape } from '@edx/frontend-platform/i18n';
 import { Alert } from '@edx/paragon';
-import { Error } from '@edx/paragon/icons';
+import { Report } from '@edx/paragon/icons';
 
 import { commentShape } from '../comments/comment/proptypes';
 import messages from '../comments/messages';
-import { selectModerationSettings, selectUserHasModerationPrivileges, selectUserIsGroupTa } from '../data/selectors';
+import {
+  selectModerationSettings, selectUserHasModerationPrivileges, selectUserIsGroupTa, selectUserIsStaff,
+} from '../data/selectors';
 import { postShape } from '../posts/post/proptypes';
 import AuthorLabel from './AuthorLabel';
 
@@ -20,15 +22,18 @@ function AlertBanner({
 }) {
   const userHasModerationPrivileges = useSelector(selectUserHasModerationPrivileges);
   const userIsGroupTa = useSelector(selectUserIsGroupTa);
+  const userIsGlobalStaff = useSelector(selectUserIsStaff);
   const { reasonCodesEnabled } = useSelector(selectModerationSettings);
   const userIsContentAuthor = getAuthenticatedUser().username === content.author;
-  const canSeeLastEditOrClosedAlert = (userHasModerationPrivileges || userIsContentAuthor || userIsGroupTa);
   const canSeeReportedBanner = content?.abuseFlagged;
+  const canSeeLastEditOrClosedAlert = (userHasModerationPrivileges || userIsGroupTa
+    || userIsGlobalStaff || userIsContentAuthor
+  );
 
   return (
     <>
       {canSeeReportedBanner && (
-        <Alert icon={Error} variant="danger" className="px-3 mb-2 py-10px shadow-none flex-fill">
+        <Alert icon={Report} variant="danger" className="px-3 mb-2 py-10px shadow-none flex-fill">
           {intl.formatMessage(messages.abuseFlaggedMessage)}
         </Alert>
       )}

src/discussions/common/AuthorLabel.jsx

@@ -38,7 +38,7 @@ function AuthorLabel({
 
   const isRetiredUser = author ? author.startsWith('retired__user') : false;
 
-  const className = classNames('d-flex align-items-center', labelColor);
+  const className = classNames('d-flex align-items-center mb-0.5', labelColor);
 
   const showUserNameAsLink = useShowLearnersTab()
       && linkToProfile && author && author !== intl.formatMessage(messages.anonymous);

src/discussions/common/AuthorLabel.test.jsx

@@ -10,12 +10,13 @@ import { AppProvider } from '@edx/frontend-platform/react';
 
 import { initializeStore } from '../../store';
 import { executeThunk } from '../../test-utils';
-import { courseConfigApiUrl } from '../data/api';
+import { getCourseConfigApiUrl } from '../data/api';
 import { fetchCourseConfig } from '../data/thunks';
 import AuthorLabel from './AuthorLabel';
 import { DiscussionContext } from './context';
 
 const courseId = 'course-v1:edX+DemoX+Demo_Course';
+const courseConfigApiUrl = getCourseConfigApiUrl();
 let store;
 let axiosMock;
 let container;

src/discussions/common/Confirmation.jsx

@@ -6,13 +6,16 @@ import { ActionRow, Button, ModalDialog } from '@edx/paragon';
 
 import messages from '../messages';
 
-function DeleteConfirmation({
+function Confirmation({
   intl,
   isOpen,
   title,
   description,
   onClose,
-  onDelete,
+  comfirmAction,
+  closeButtonVaraint,
+  confirmButtonVariant,
+  confirmButtonText,
 }) {
   return (
     <ModalDialog title={title} isOpen={isOpen} hasCloseButton={false} onClose={onClose} zIndex={5000}>
@@ -26,11 +29,11 @@ function DeleteConfirmation({
       </ModalDialog.Body>
       <ModalDialog.Footer>
         <ActionRow>
-          <ModalDialog.CloseButton variant="tertiary">
-            {intl.formatMessage(messages.deleteConfirmationCancel)}
+          <ModalDialog.CloseButton variant={closeButtonVaraint}>
+            {intl.formatMessage(messages.confirmationCancel)}
           </ModalDialog.CloseButton>
-          <Button variant="primary" onClick={onDelete}>
-            {intl.formatMessage(messages.deleteConfirmationDelete)}
+          <Button variant={confirmButtonVariant} onClick={comfirmAction}>
+            { confirmButtonText || intl.formatMessage(messages.confirmationConfirm)}
           </Button>
         </ActionRow>
       </ModalDialog.Footer>
@@ -38,13 +41,22 @@ function DeleteConfirmation({
   );
 }
 
-DeleteConfirmation.propTypes = {
+Confirmation.propTypes = {
   intl: intlShape.isRequired,
   isOpen: PropTypes.bool.isRequired,
   onClose: PropTypes.func.isRequired,
-  onDelete: PropTypes.func.isRequired,
+  comfirmAction: PropTypes.func.isRequired,
   title: PropTypes.string.isRequired,
   description: PropTypes.string.isRequired,
+  closeButtonVaraint: PropTypes.string,
+  confirmButtonVariant: PropTypes.string,
+  confirmButtonText: PropTypes.string,
 };
 
-export default injectIntl(DeleteConfirmation);
+Confirmation.defaultProps = {
+  closeButtonVaraint: 'default',
+  confirmButtonVariant: 'primary',
+  confirmButtonText: '',
+};
+
+export default injectIntl(Confirmation);

src/discussions/common/context.js

@@ -6,7 +6,7 @@ export const DiscussionContext = React.createContext({
   courseId: null,
   postId: null,
   topicId: null,
-  inContext: false,
+  enableInContextSidebar: false,
   category: null,
   learnerUsername: null,
 });

src/discussions/common/index.js

@@ -1,5 +1,5 @@
 export { default as ActionsDropdown } from './ActionsDropdown';
 export { default as AlertBanner } from './AlertBanner';
 export { default as AuthorLabel } from './AuthorLabel';
-export { default as DeleteConfirmation } from './DeleteConfirmation';
+export { default as Confirmation } from './Confirmation';
 export { default as EndorsedAlertBanner } from './EndorsedAlertBanner';

src/discussions/data/api.js

@@ -7,16 +7,14 @@ ensureConfig([
   'LMS_BASE_URL',
 ], 'Posts API service');
 
-const apiBaseUrl = getConfig().LMS_BASE_URL;
-
-export const courseConfigApiUrl = `${apiBaseUrl}/api/discussion/v1/courses/`;
+export const getCourseConfigApiUrl = () => `${getConfig().LMS_BASE_URL}/api/discussion/v1/courses/`;
 
 /**
  * Get discussions course config
  * @param {string} courseId
  */
 export async function getDiscussionsConfig(courseId) {
-  const url = `${courseConfigApiUrl}${courseId}/`;
+  const url = `${getCourseConfigApiUrl()}${courseId}/`;
   const { data } = await getAuthenticatedHttpClient().get(url);
   return data;
 }
@@ -26,7 +24,7 @@ export async function getDiscussionsConfig(courseId) {
  * @param {string} courseId
  */
 export async function getDiscussionsSettings(courseId) {
-  const url = `${courseConfigApiUrl}${courseId}/settings`;
+  const url = `${getCourseConfigApiUrl()}${courseId}/settings`;
   const { data } = await getAuthenticatedHttpClient().get(url);
   return data;
 }

src/discussions/data/hooks.js

@@ -1,6 +1,9 @@
 /* eslint-disable import/prefer-default-export */
 import {
-  useContext, useEffect, useRef, useState,
+  useContext,
+  useEffect,
+  useRef,
+  useState,
 } from 'react';
 
 import { useDispatch, useSelector } from 'react-redux';
@@ -10,20 +13,30 @@ import { getAuthenticatedUser } from '@edx/frontend-platform/auth';
 import { AppContext } from '@edx/frontend-platform/react';
 import { breakpoints, useWindowSize } from '@edx/paragon';
 
-import { Routes } from '../../data/constants';
+import { RequestStatus, Routes } from '../../data/constants';
 import { selectTopicsUnderCategory } from '../../data/selectors';
 import { fetchCourseBlocks } from '../../data/thunks';
 import { DiscussionContext } from '../common/context';
 import { clearRedirect } from '../posts/data';
+import { threadsLoadingStatus } from '../posts/data/selectors';
 import { selectTopics } from '../topics/data/selectors';
-import { fetchCourseTopics } from '../topics/data/thunks';
-import { discussionsPath } from '../utils';
+import tourCheckpoints from '../tours/constants';
+import { selectTours } from '../tours/data/selectors';
+import { updateTourShowStatus } from '../tours/data/thunks';
+import messages from '../tours/messages';
+import { discussionsPath, inBlackoutDateRange } from '../utils';
 import {
-  selectAreThreadsFiltered, selectLearnersTabEnabled,
+  selectAreThreadsFiltered,
+  selectBlackoutDate,
+  selectEnableInContext,
+  selectIsCourseAdmin,
+  selectIsCourseStaff,
+  selectLearnersTabEnabled,
   selectModerationSettings,
   selectPostThreadCount,
   selectUserHasModerationPrivileges,
   selectUserIsGroupTa,
+  selectUserIsStaff,
 } from './selectors';
 import { fetchCourseConfig } from './thunks';
 
@@ -34,27 +47,28 @@ export function useTotalTopicThreadCount() {
     return 0;
   }
 
-  return Object.keys(topics).reduce((total, topicId) => {
-    const topic = topics[topicId];
-    return total + topic.threadCounts.discussion + topic.threadCounts.question;
-  }, 0);
+  return Object.keys(topics)
+    .reduce((total, topicId) => {
+      const topic = topics[topicId];
+      return total + topic.threadCounts.discussion + topic.threadCounts.question;
+    }, 0);
 }
 
 export const useSidebarVisible = () => {
+  const enableInContext = useSelector(selectEnableInContext);
+  const isViewingTopics = useRouteMatch(Routes.TOPICS.ALL);
+  const isViewingLearners = useRouteMatch(Routes.LEARNERS.PATH);
   const isFiltered = useSelector(selectAreThreadsFiltered);
   const totalThreads = useSelector(selectPostThreadCount);
-  const isViewingTopics = useRouteMatch(Routes.TOPICS.PATH);
-  const isViewingLearners = useRouteMatch(Routes.LEARNERS.PATH);
+  const isThreadsEmpty = Boolean(useSelector(threadsLoadingStatus()) === RequestStatus.SUCCESSFUL && !totalThreads);
+  const isIncontextTopicsView = Boolean(useRouteMatch(Routes.TOPICS.PATH) && enableInContext);
+  const hideSidebar = Boolean(isThreadsEmpty && !isFiltered && !(isViewingTopics?.isExact || isViewingLearners));
 
-  if (isFiltered) {
+  if (isIncontextTopicsView) {
     return true;
   }
 
-  if (isViewingTopics || isViewingLearners) {
-    return true;
-  }
-
-  return totalThreads > 0;
+  return !hideSidebar;
 };
 
 export function useCourseDiscussionData(courseId) {
@@ -64,7 +78,6 @@ export function useCourseDiscussionData(courseId) {
   useEffect(() => {
     async function fetchBaseData() {
       await dispatch(fetchCourseConfig(courseId));
-      await dispatch(fetchCourseTopics(courseId));
       await dispatch(fetchCourseBlocks(courseId, authenticatedUser.username));
     }
 
@@ -72,7 +85,7 @@ export function useCourseDiscussionData(courseId) {
   }, [courseId]);
 }
 
-export function useRedirectToThread(courseId, inContext) {
+export function useRedirectToThread(courseId, enableInContextSidebar) {
   const dispatch = useDispatch();
   const redirectToThread = useSelector(
     (state) => state.threads.redirectToThread,
@@ -85,7 +98,7 @@ export function useRedirectToThread(courseId, inContext) {
     // stored in redirectToThread
     if (redirectToThread) {
       dispatch(clearRedirect());
-      const newLocation = discussionsPath(Routes.COMMENTS.PAGES[inContext ? 'topics' : 'my-posts'], {
+      const newLocation = discussionsPath(Routes.COMMENTS.PAGES[enableInContextSidebar ? 'topics' : 'my-posts'], {
         courseId,
         postId: redirectToThread.threadId,
         topicId: redirectToThread.topicId,
@@ -97,7 +110,7 @@ export function useRedirectToThread(courseId, inContext) {
 
 export function useIsOnDesktop() {
   const windowSize = useWindowSize();
-  return windowSize.width >= breakpoints.large.minWidth;
+  return windowSize.width >= breakpoints.medium.minWidth;
 }
 
 export function useIsOnXLDesktop() {
@@ -174,3 +187,40 @@ export const useCurrentDiscussionTopic = () => {
   }
   return null;
 };
+
+export const useUserCanAddThreadInBlackoutDate = () => {
+  const blackoutDateRange = useSelector(selectBlackoutDate);
+  const isUserAdmin = useSelector(selectUserIsStaff);
+  const userHasModerationPrivilages = useSelector(selectUserHasModerationPrivileges);
+  const isUserGroupTA = useSelector(selectUserIsGroupTa);
+  const isCourseAdmin = useSelector(selectIsCourseAdmin);
+  const isCourseStaff = useSelector(selectIsCourseStaff);
+  const isInBlackoutDateRange = inBlackoutDateRange(blackoutDateRange);
+
+  return (!(isInBlackoutDateRange)
+          || (isUserAdmin || userHasModerationPrivilages || isUserGroupTA || isCourseAdmin || isCourseStaff));
+};
+
+function camelToConstant(string) {
+  return string.replace(/[A-Z]/g, (match) => `_${match}`).toUpperCase();
+}
+
+export const useTourConfiguration = (intl) => {
+  const dispatch = useDispatch();
+
+  const { enableInContextSidebar } = useContext(DiscussionContext);
+  const tours = useSelector(selectTours);
+
+  return tours.map((tour) => (
+    {
+      tourId: tour.tourName,
+      advanceButtonText: intl.formatMessage(messages.advanceButtonText),
+      dismissButtonText: intl.formatMessage(messages.dismissButtonText),
+      endButtonText: intl.formatMessage(messages.endButtonText),
+      enabled: tour && Boolean(tour.showTour && !enableInContextSidebar),
+      onDismiss: () => dispatch(updateTourShowStatus(tour.id)),
+      onEnd: () => dispatch(updateTourShowStatus(tour.id)),
+      checkpoints: tourCheckpoints(intl)[camelToConstant(tour.tourName)],
+    }
+  ));
+};

src/discussions/data/hooks.test.jsx

@@ -1,15 +1,33 @@
 import { render } from '@testing-library/react';
+import MockAdapter from 'axios-mock-adapter';
 import { IntlProvider } from 'react-intl';
+import { Factory } from 'rosie';
 
 import { initializeMockApp } from '@edx/frontend-platform';
+import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
 import { AppProvider } from '@edx/frontend-platform/react';
 
 import { initializeStore } from '../../store';
+import { executeThunk } from '../../test-utils';
 import { DiscussionContext } from '../common/context';
-import { useCurrentDiscussionTopic } from './hooks';
+import { getCourseConfigApiUrl } from './api';
+import { useCurrentDiscussionTopic, useUserCanAddThreadInBlackoutDate } from './hooks';
+import { fetchCourseConfig } from './thunks';
 
+const courseId = 'course-v1:edX+TestX+Test_Course';
+const courseConfigApiUrl = getCourseConfigApiUrl();
 let store;
-initializeMockApp();
+let axiosMock;
+
+const generateApiResponse = (blackouts = [], isCourseAdmin = false) => ({
+  blackouts,
+  hasModerationPrivileges: false,
+  isGroupTa: false,
+  isCourseAdmin,
+  isCourseStaff: false,
+  isUserAdmin: false,
+});
+
 describe('Hooks', () => {
   describe('useCurrentDiscussionTopic', () => {
     function ComponentWithHook() {
@@ -39,6 +57,7 @@ describe('Hooks', () => {
     }
 
     beforeEach(() => {
+      initializeMockApp();
       store = initializeStore({
         blocks: {
           blocks: {
@@ -82,4 +101,75 @@ describe('Hooks', () => {
       expect(queryByText('null')).toBeInTheDocument();
     });
   });
+
+  describe('useUserCanAddThreadInBlackoutDate', () => {
+    function ComponentWithHook() {
+      const userCanAddThreadInBlackoutDate = useUserCanAddThreadInBlackoutDate();
+      return (
+        <div>
+          {String(userCanAddThreadInBlackoutDate)}
+        </div>
+      );
+    }
+
+    function renderComponent() {
+      return render(
+        <IntlProvider locale="en">
+          <AppProvider store={store}>
+            <ComponentWithHook />
+          </AppProvider>
+        </IntlProvider>,
+      );
+    }
+    describe('User can add Thread in blackoutdates ', () => {
+      beforeEach(() => {
+        initializeMockApp({
+          authenticatedUser: {
+            userId: 3,
+            username: 'abc123',
+            administrator: true,
+            roles: [],
+          },
+        });
+        axiosMock = new MockAdapter(getAuthenticatedHttpClient());
+        Factory.resetAll();
+        store = initializeStore();
+      });
+
+      test('when blackoutdates are not active and Role is Learner return true', async () => {
+        axiosMock.onGet(`${courseConfigApiUrl}${courseId}/`)
+          .reply(200, generateApiResponse([], false));
+        await executeThunk(fetchCourseConfig(courseId), store.dispatch, store.getState);
+        const { queryByText } = renderComponent();
+        expect(queryByText('true')).toBeInTheDocument();
+      });
+
+      test('when blackoutdates are not active and Role is not Learner return true', async () => {
+        axiosMock.onGet(`${courseConfigApiUrl}${courseId}/`)
+          .reply(200, generateApiResponse([], true));
+        await executeThunk(fetchCourseConfig(courseId), store.dispatch, store.getState);
+        const { queryByText } = renderComponent();
+        expect(queryByText('true')).toBeInTheDocument();
+      });
+
+      test('when blackoutdates are active and Role is Learner return false', async () => {
+        axiosMock.onGet(`${courseConfigApiUrl}${courseId}/`)
+          .reply(200, generateApiResponse([{
+            start: '2022-11-25T00:00:00Z',
+            end: '2050-11-25T23:59:00Z',
+          }], false));
+        await executeThunk(fetchCourseConfig(courseId), store.dispatch, store.getState);
+        const { queryByText } = renderComponent();
+        expect(queryByText('false')).toBeInTheDocument();
+      });
+
+      test('when blackoutdates are active and Role is not Learner return true', async () => {
+        axiosMock.onGet(`${courseConfigApiUrl}${courseId}/`)
+          .reply(200, generateApiResponse([
+            { start: '2022-11-25T00:00:00Z', end: '2050-11-25T23:59:00Z' }], true));
+        const { queryByText } = renderComponent();
+        expect(queryByText('true')).toBeInTheDocument();
+      });
+    });
+  });
 });

src/discussions/data/selectors.js

@@ -24,6 +24,12 @@ export const selectBlackoutDate = state => state.config.blackouts;
 
 export const selectGroupAtSubsection = state => state.config.groupAtSubsection;
 
+export const selectIsCourseAdmin = state => state.config.isCourseAdmin;
+
+export const selectIsCourseStaff = state => state.config.isCourseStaff;
+
+export const selectEnableInContext = state => state.config.enableInContext;
+
 export const selectModerationSettings = state => ({
   postCloseReasons: state.config.postCloseReasons,
   editReasons: state.config.editReasons,
@@ -47,7 +53,7 @@ export function selectAreThreadsFiltered(state) {
 
 export function selectTopicThreadCount(topicId) {
   return state => {
-    const topic = state.topics.topics[topicId];
+    const topic = topicId && state.topics?.topics[topicId];
     if (!topic) {
       return 0;
     }

src/discussions/data/slices.js

@@ -14,6 +14,8 @@ const configSlice = createSlice({
     groupAtSubsection: false,
     hasModerationPrivileges: false,
     isGroupTa: false,
+    isCourseAdmin: false,
+    isCourseStaff: false,
     isUserAdmin: false,
     learnersTabEnabled: false,
     settings: {
@@ -25,6 +27,7 @@ const configSlice = createSlice({
     reasonCodesEnabled: false,
     editReasons: [],
     postCloseReasons: [],
+    enableInContext: false,
   },
   reducers: {
     fetchConfigRequest: (state) => {

src/discussions/data/thunks.js

@@ -3,7 +3,7 @@ import { camelCaseObject } from '@edx/frontend-platform';
 import { logError } from '@edx/frontend-platform/logging';
 
 import {
-  LearnersOrdering,
+  DiscussionProvider, LearnersOrdering,
   PostsStatusFilter,
 } from '../../data/constants';
 import { setSortedBy } from '../learners/data';
@@ -36,7 +36,10 @@ export function fetchCourseConfig(courseId) {
         learnerSort = LearnersOrdering.BY_FLAG;
       }
 
-      dispatch(fetchConfigSuccess(camelCaseObject(config)));
+      dispatch(fetchConfigSuccess(camelCaseObject({
+        ...config,
+        enable_in_context: config.provider === DiscussionProvider.OPEN_EDX,
+      })));
       dispatch(setSortedBy(learnerSort));
       dispatch(setStatusFilter(postsFilterStatus));
     } catch (error) {

src/discussions/discussions-home/DiscussionSidebar.jsx

@@ -14,51 +14,72 @@ import { DiscussionContext } from '../common/context';
 import {
   useContainerSize, useIsOnDesktop, useIsOnXLDesktop, useShowLearnersTab,
 } from '../data/hooks';
-import { selectconfigLoadingStatus } from '../data/selectors';
+import { selectconfigLoadingStatus, selectEnableInContext } from '../data/selectors';
+import { TopicPostsView, TopicsView as InContextTopicsView } from '../in-context-topics';
 import { LearnerPostsView, LearnersView } from '../learners';
 import { PostsView } from '../posts';
-import { TopicsView } from '../topics';
+import { TopicsView as LegacyTopicsView } from '../topics';
 
 export default function DiscussionSidebar({ displaySidebar, postActionBarRef }) {
   const location = useLocation();
   const isOnDesktop = useIsOnDesktop();
   const isOnXLDesktop = useIsOnXLDesktop();
+  const { enableInContextSidebar } = useContext(DiscussionContext);
+  const enableInContext = useSelector(selectEnableInContext);
   const configStatus = useSelector(selectconfigLoadingStatus);
   const redirectToLearnersTab = useShowLearnersTab();
   const sidebarRef = useRef(null);
   const postActionBarHeight = useContainerSize(postActionBarRef);
   const { height: windowHeight } = useWindowSize();
-  const { inContext } = useContext(DiscussionContext);
 
   useEffect(() => {
-    if (sidebarRef && postActionBarHeight && !inContext) {
+    if (sidebarRef && postActionBarHeight && !enableInContextSidebar) {
       if (isOnDesktop) {
         sidebarRef.current.style.maxHeight = `${windowHeight - postActionBarHeight}px`;
       }
       sidebarRef.current.style.minHeight = `${windowHeight - postActionBarHeight}px`;
       sidebarRef.current.style.top = `${postActionBarHeight}px`;
     }
-  }, [sidebarRef, postActionBarHeight, inContext]);
+  }, [sidebarRef, postActionBarHeight, enableInContextSidebar]);
 
   return (
     <div
       ref={sidebarRef}
-      className={classNames('flex-column  position-sticky', {
+      className={classNames('flex-column position-sticky', {
         'd-none': !displaySidebar,
-        'd-flex overflow-auto': displaySidebar,
+        'd-flex overflow-auto box-shadow-centered-1': displaySidebar,
         'w-100': !isOnDesktop,
         'sidebar-desktop-width': isOnDesktop && !isOnXLDesktop,
         'w-25 sidebar-XL-width': isOnXLDesktop,
-        'min-content-height': !inContext,
+        'min-content-height': !enableInContextSidebar,
       })}
       data-testid="sidebar"
     >
       <Switch>
+        {enableInContext && !enableInContextSidebar && (
+          <Route
+            path={Routes.TOPICS.ALL}
+            component={InContextTopicsView}
+            exact
+          />
+        )}
+        {enableInContext && !enableInContextSidebar && (
+          <Route
+            path={[
+              Routes.TOPICS.TOPIC,
+              Routes.TOPICS.CATEGORY,
+              Routes.TOPICS.TOPIC_POST,
+              Routes.TOPICS.TOPIC_POST_EDIT,
+            ]}
+            component={TopicPostsView}
+            exact
+          />
+        )}
         <Route
-          path={[Routes.POSTS.PATH, Routes.POSTS.ALL_POSTS, Routes.TOPICS.CATEGORY, Routes.POSTS.MY_POSTS]}
+          path={[Routes.POSTS.ALL_POSTS, Routes.POSTS.MY_POSTS, Routes.POSTS.PATH, Routes.TOPICS.CATEGORY]}
           component={PostsView}
         />
-        <Route path={Routes.TOPICS.PATH} component={TopicsView} />
+        <Route path={Routes.TOPICS.PATH} component={LegacyTopicsView} />
         {redirectToLearnersTab && (
           <Route path={Routes.LEARNERS.POSTS} component={LearnerPostsView} />
         )}
@@ -66,13 +87,13 @@ export default function DiscussionSidebar({ displaySidebar, postActionBarRef })
           <Route path={Routes.LEARNERS.PATH} component={LearnersView} />
         )}
         {configStatus === RequestStatus.SUCCESSFUL && (
-        <Redirect
-          from={Routes.DISCUSSIONS.PATH}
-          to={{
-            ...location,
-            pathname: Routes.POSTS.ALL_POSTS,
-          }}
-        />
+          <Redirect
+            from={Routes.DISCUSSIONS.PATH}
+            to={{
+              ...location,
+              pathname: Routes.POSTS.ALL_POSTS,
+            }}
+          />
         )}
       </Switch>
     </div>

src/discussions/discussions-home/DiscussionSidebar.test.jsx

@@ -13,7 +13,7 @@ import { AppProvider } from '@edx/frontend-platform/react';
 import { initializeStore } from '../../store';
 import { DiscussionContext } from '../common/context';
 import { fetchConfigSuccess } from '../data/slices';
-import { threadsApiUrl } from '../posts/data/api';
+import { getThreadsApiUrl } from '../posts/data/api';
 import DiscussionSidebar from './DiscussionSidebar';
 
 import '../posts/data/__factories__';
@@ -21,6 +21,7 @@ import '../posts/data/__factories__';
 let store;
 let container;
 const courseId = 'course-v1:edX+DemoX+Demo_Course';
+const threadsApiUrl = getThreadsApiUrl();
 let axiosMock;
 
 function renderComponent(displaySidebar = true, location = `/${courseId}/`) {

src/discussions/discussions-home/DiscussionsHome.jsx

@@ -12,60 +12,53 @@ import { getConfig } from '@edx/frontend-platform';
 
 import { PostActionsBar } from '../../components';
 import { CourseTabsNavigation } from '../../components/NavigationBar';
+import { selectCourseTabs } from '../../components/NavigationBar/data/selectors';
 import { ALL_ROUTES, DiscussionProvider, Routes } from '../../data/constants';
 import { DiscussionContext } from '../common/context';
 import {
   useCourseDiscussionData, useIsOnDesktop, useRedirectToThread, useShowLearnersTab, useSidebarVisible,
 } from '../data/hooks';
-import { selectDiscussionProvider } from '../data/selectors';
+import { selectDiscussionProvider, selectEnableInContext } from '../data/selectors';
 import { EmptyLearners, EmptyPosts, EmptyTopics } from '../empty-posts';
+import { EmptyTopic as InContextEmptyTopics } from '../in-context-topics/components';
 import messages from '../messages';
-import { BreadcrumbMenu, LegacyBreadcrumbMenu, NavigationBar } from '../navigation';
+import { LegacyBreadcrumbMenu, NavigationBar } from '../navigation';
+import { selectPostEditorVisible } from '../posts/data/selectors';
+import DiscussionsProductTour from '../tours/DiscussionsProductTour';
 import { postMessageToParent } from '../utils';
 import BlackoutInformationBanner from './BlackoutInformationBanner';
 import DiscussionContent from './DiscussionContent';
 import DiscussionSidebar from './DiscussionSidebar';
-import InformationBanner from './InformationsBanner';
+import InformationBanner from './InformationBanner';
 
 export default function DiscussionsHome() {
   const location = useLocation();
   const postActionBarRef = useRef(null);
-  const postEditorVisible = useSelector(
-    (state) => state.threads.postEditorVisible,
-  );
-  const {
-    params: { page },
-  } = useRouteMatch(`${Routes.COMMENTS.PAGE}?`);
-
+  const postEditorVisible = useSelector(selectPostEditorVisible);
+  const provider = useSelector(selectDiscussionProvider);
+  const enableInContext = useSelector(selectEnableInContext);
+  const { courseNumber, courseTitle, org } = useSelector(selectCourseTabs);
+  const { params: { page } } = useRouteMatch(`${Routes.COMMENTS.PAGE}?`);
   const { params: { path } } = useRouteMatch(`${Routes.DISCUSSIONS.PATH}/:path*`);
   const { params } = useRouteMatch(ALL_ROUTES);
   const isRedirectToLearners = useShowLearnersTab();
-  const isFeedbackBannerVisible = getConfig().DISPLAY_FEEDBACK_BANNER === 'true';
-
-  const {
-    courseId,
-    postId,
-    topicId,
-    category,
-    learnerUsername,
-  } = params;
-  const inContext = new URLSearchParams(location.search).get('inContext') !== null;
-  // Display the content area if we are currently viewing/editing a post or creating one.
-  const displayContentArea = postId || postEditorVisible || (learnerUsername && postId);
-  let displaySidebar = useSidebarVisible();
-
   const isOnDesktop = useIsOnDesktop();
+  let displaySidebar = useSidebarVisible();
+  const enableInContextSidebar = Boolean(new URLSearchParams(location.search).get('inContextSidebar') !== null);
+  const isFeedbackBannerVisible = getConfig().DISPLAY_FEEDBACK_BANNER === 'true';
+  const {
+    courseId, postId, topicId, category, learnerUsername,
+  } = params;
 
-  const { courseNumber, courseTitle, org } = useSelector((state) => state.courseTabs);
-  if (displayContentArea) {
-    // If the window is larger than a particular size, show the sidebar for navigating between posts/topics.
-    // However, for smaller screens or embeds, only show the sidebar if the content area isn't displayed.
-    displaySidebar = isOnDesktop;
-  }
-
-  const provider = useSelector(selectDiscussionProvider);
   useCourseDiscussionData(courseId);
-  useRedirectToThread(courseId, inContext);
+  useRedirectToThread(courseId, enableInContextSidebar);
+
+  /*  Display the content area if we are currently viewing/editing a post or creating one.
+  If the window is larger than a particular size, show the sidebar for navigating between posts/topics.
+  However, for smaller screens or embeds, onlyshow the sidebar if the content area isn't displayed. */
+  const displayContentArea = (postId || postEditorVisible || (learnerUsername && postId));
+  if (displayContentArea) { displaySidebar = isOnDesktop; }
+
   useEffect(() => {
     if (path && path !== 'undefined') {
       postMessageToParent('discussions.navigate', { path });
@@ -78,41 +71,47 @@ export default function DiscussionsHome() {
       courseId,
       postId,
       topicId,
-      inContext,
+      enableInContextSidebar,
       category,
       learnerUsername,
     }}
     >
-      {!inContext && <Header courseOrg={org} courseNumber={courseNumber} courseTitle={courseTitle} />}
+      {!enableInContextSidebar && <Header courseOrg={org} courseNumber={courseNumber} courseTitle={courseTitle} />}
       <main className="container-fluid d-flex flex-column p-0 w-100" id="main" tabIndex="-1">
-        {!inContext && <CourseTabsNavigation activeTab="discussion" courseId={courseId} />}
+        {!enableInContextSidebar && <CourseTabsNavigation activeTab="discussion" courseId={courseId} />}
         <div
-          className={classNames('header-action-bar', { 'shadow-none border-light-300 border-bottom': inContext })}
+          className={classNames('header-action-bar', {
+            'shadow-none border-light-300 border-bottom': enableInContextSidebar,
+          })}
           ref={postActionBarRef}
         >
           <div
             className={classNames('d-flex flex-row justify-content-between navbar fixed-top', {
-              'pl-4 pr-2.5 py-1.5': inContext,
+              'pl-4 pr-2.5 py-1.5': enableInContextSidebar,
             })}
           >
-            {!inContext && <Route path={Routes.DISCUSSIONS.PATH} component={NavigationBar} />}
-            <PostActionsBar inContext={inContext} />
+            {!enableInContextSidebar && <Route path={Routes.DISCUSSIONS.PATH} component={NavigationBar} />}
+            <PostActionsBar />
           </div>
           {isFeedbackBannerVisible && <InformationBanner />}
           <BlackoutInformationBanner />
         </div>
-        {!inContext && (
+        {provider === DiscussionProvider.LEGACY && (
           <Route
             path={[Routes.POSTS.PATH, Routes.TOPICS.CATEGORY]}
-            component={provider === DiscussionProvider.LEGACY ? LegacyBreadcrumbMenu : BreadcrumbMenu}
+            component={LegacyBreadcrumbMenu}
           />
         )}
+
         <div className="d-flex flex-row">
           <DiscussionSidebar displaySidebar={displaySidebar} postActionBarRef={postActionBarRef} />
           {displayContentArea && <DiscussionContent />}
           {!displayContentArea && (
             <Switch>
-              <Route path={Routes.TOPICS.PATH} component={EmptyTopics} />
+              <Route
+                path={Routes.TOPICS.PATH}
+                component={(enableInContext || enableInContextSidebar) ? InContextEmptyTopics : EmptyTopics}
+              />
               <Route
                 path={Routes.POSTS.MY_POSTS}
                 render={routeProps => <EmptyPosts {...routeProps} subTitleMessage={messages.emptyMyPosts} />}
@@ -125,8 +124,9 @@ export default function DiscussionsHome() {
             </Switch>
           )}
         </div>
+        <DiscussionsProductTour />
       </main>
-      {!inContext && <Footer />}
+      {!enableInContextSidebar && <Footer />}
     </DiscussionContext.Provider>
   );
 }

src/discussions/discussions-home/DiscussionsHome.test.jsx

@@ -1,18 +1,25 @@
 import {
   fireEvent, render, screen, waitFor,
 } from '@testing-library/react';
+import MockAdapter from 'axios-mock-adapter';
 import { act } from 'react-dom/test-utils';
 import { IntlProvider } from 'react-intl';
 import { Context as ResponsiveContext } from 'react-responsive';
 import { MemoryRouter } from 'react-router';
 
 import { initializeMockApp } from '@edx/frontend-platform';
+import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
 import { AppProvider } from '@edx/frontend-platform/react';
 
 import { initializeStore } from '../../store';
+import { executeThunk } from '../../test-utils';
+import { getCourseConfigApiUrl } from '../data/api';
+import { fetchCourseConfig } from '../data/thunks';
 import navigationBarMessages from '../navigation/navigation-bar/messages';
 import DiscussionsHome from './DiscussionsHome';
 
+const courseConfigApiUrl = getCourseConfigApiUrl();
+let axiosMock;
 let store;
 const courseId = 'course-v1:edX+DemoX+Demo_Course';
 
@@ -40,7 +47,7 @@ describe('DiscussionsHome', () => {
         roles: [],
       },
     });
-
+    axiosMock = new MockAdapter(getAuthenticatedHttpClient());
     store = initializeStore();
   });
 
@@ -63,7 +70,9 @@ describe('DiscussionsHome', () => {
   });
 
   test('in-context view should show close button', async () => {
-    renderComponent(`/${courseId}/topics?inContext`);
+    axiosMock.onGet(`${courseConfigApiUrl}${courseId}/`).reply(200, { provider: 'openedx' });
+    await executeThunk(fetchCourseConfig(courseId), store.dispatch, store.getState);
+    renderComponent(`/${courseId}/topics?inContextSidebar`);
 
     expect(screen.queryByText(navigationBarMessages.allTopics.defaultMessage))
       .not
@@ -73,10 +82,12 @@ describe('DiscussionsHome', () => {
   });
 
   test('the close button should post a message', async () => {
+    axiosMock.onGet(`${courseConfigApiUrl}${courseId}/`).reply(200, { provider: 'openedx' });
+    await executeThunk(fetchCourseConfig(courseId), store.dispatch, store.getState);
     const { parent } = window;
     delete window.parent;
     window.parent = { ...window, postMessage: jest.fn() };
-    renderComponent(`/${courseId}/topics?inContext`);
+    renderComponent(`/${courseId}/topics?inContextSidebar`);
 
     const closeButton = screen.queryByRole('button', { name: 'Close' });
 
@@ -88,7 +99,7 @@ describe('DiscussionsHome', () => {
     window.parent = parent;
   });
 
-  test('header, course navigation bar and footer are visible', async () => {
+  test('header, course navigation bar and footer are only visible in Discussions MFE', async () => {
     renderComponent();
     expect(screen.queryByRole('banner')).toBeInTheDocument();
     expect(document.getElementById('courseTabsNavigation')).toBeInTheDocument();

src/discussions/discussions-home/InformationBanner.test.jsx

@@ -8,7 +8,7 @@ import { initializeStore } from '../../store';
 import { DiscussionContext } from '../common/context';
 import { fetchConfigSuccess } from '../data/slices';
 import messages from '../messages';
-import InformationBanner from './InformationsBanner';
+import InformationBanner from './InformationBanner';
 
 import '../posts/data/__factories__';
 

src/discussions/empty-posts/EmptyPosts.jsx

@@ -52,7 +52,11 @@ function EmptyPosts({ intl, subTitleMessage }) {
 }
 
 EmptyPosts.propTypes = {
-  subTitleMessage: propTypes.string.isRequired,
+  subTitleMessage: propTypes.shape({
+    id: propTypes.string,
+    defaultMessage: propTypes.string,
+    description: propTypes.string,
+  }).isRequired,
   intl: intlShape.isRequired,
 };
 

src/discussions/empty-posts/EmptyPosts.test.jsx

@@ -12,7 +12,7 @@ import { AppProvider } from '@edx/frontend-platform/react';
 import { initializeStore } from '../../store';
 import { executeThunk } from '../../test-utils';
 import messages from '../messages';
-import { threadsApiUrl } from '../posts/data/api';
+import { getThreadsApiUrl } from '../posts/data/api';
 import { fetchThreads } from '../posts/data/thunks';
 import EmptyPosts from './EmptyPosts';
 
@@ -20,6 +20,7 @@ import '../posts/data/__factories__';
 
 let store;
 const courseId = 'course-v1:edX+DemoX+Demo_Course';
+const threadsApiUrl = getThreadsApiUrl();
 
 function renderComponent(location = `/${courseId}/`) {
   return render(

src/discussions/empty-posts/EmptyTopics.test.jsx

@@ -9,7 +9,7 @@ import { initializeMockApp } from '@edx/frontend-platform';
 import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
 import { AppProvider } from '@edx/frontend-platform/react';
 
-import { API_BASE_URL } from '../../data/constants';
+import { getApiBaseUrl } from '../../data/constants';
 import { initializeStore } from '../../store';
 import { executeThunk } from '../../test-utils';
 import messages from '../messages';
@@ -20,7 +20,7 @@ import '../topics/data/__factories__';
 
 let store;
 const courseId = 'course-v1:edX+DemoX+Demo_Course';
-const topicsApiUrl = `${API_BASE_URL}/api/discussion/v1/course_topics/${courseId}`;
+const topicsApiUrl = `${getApiBaseUrl()}/api/discussion/v1/course_topics/${courseId}`;
 
 function renderComponent(location = `/${courseId}/topics/`) {
   return render(

src/discussions/in-context-topics/TopicPostsView.jsx

@@ -0,0 +1,85 @@
+import React, { useContext } from 'react';
+
+import { useSelector } from 'react-redux';
+import { useLocation } from 'react-router-dom';
+
+import { injectIntl, intlShape } from '@edx/frontend-platform/i18n';
+import { Spinner } from '@edx/paragon';
+
+import { RequestStatus, Routes } from '../../data/constants';
+import { DiscussionContext } from '../common/context';
+import { selectTopicThreads } from '../posts/data/selectors';
+import PostsList from '../posts/PostsList';
+import { discussionsPath, handleKeyDown } from '../utils';
+import {
+  selectArchivedTopic, selectLoadingStatus, selectNonCoursewareTopics,
+  selectSubsection, selectSubsectionUnits, selectUnits,
+} from './data/selectors';
+import { BackButton, NoResults } from './components';
+import messages from './messages';
+import { Topic } from './topic';
+
+function TopicPostsView({ intl }) {
+  const location = useLocation();
+  const { courseId, topicId, category } = useContext(DiscussionContext);
+  const topicsLoadingStatus = useSelector(selectLoadingStatus);
+  const posts = useSelector(selectTopicThreads([topicId]));
+  const selectedSubsectionUnits = useSelector(selectSubsectionUnits(category));
+  const selectedSubsection = useSelector(selectSubsection(category));
+  const selectedUnit = useSelector(selectUnits)?.find(unit => unit.id === topicId);
+  const selectedNonCoursewareTopic = useSelector(selectNonCoursewareTopics)?.find(topic => topic.id === topicId);
+  const selectedArchivedTopic = useSelector(selectArchivedTopic(topicId));
+
+  const backButtonPath = () => {
+    const path = selectedUnit ? Routes.TOPICS.CATEGORY : Routes.TOPICS.ALL;
+    const params = selectedUnit ? { courseId, category: selectedUnit?.parentId } : { courseId };
+    return discussionsPath(path, params)(location);
+  };
+
+  return (
+    <div className="discussion-posts d-flex flex-column h-100">
+      {topicId ? (
+        <BackButton
+          path={backButtonPath()}
+          title={selectedUnit?.name || selectedNonCoursewareTopic?.name || selectedArchivedTopic?.name
+            || intl.formatMessage(messages.unnamedTopic)}
+        />
+      ) : (
+        <BackButton
+          path={discussionsPath(Routes.TOPICS.ALL, { courseId })(location)}
+          title={selectedSubsection?.displayName || intl.formatMessage(messages.unnamedSubsection)}
+        />
+      )}
+      <div className="border-bottom border-light-400" />
+      <div className="list-group list-group-flush flex-fill" role="list" onKeyDown={e => handleKeyDown(e)}>
+        {topicId ? (
+          <PostsList
+            posts={posts}
+            topics={[topicId]}
+          />
+        ) : (
+          selectedSubsectionUnits?.map((unit) => (
+            <Topic
+              key={unit.id}
+              topic={unit}
+            />
+          ))
+        )}
+        {(category && selectedSubsectionUnits.length === 0 && topicsLoadingStatus === RequestStatus.SUCCESSFUL) && (
+          <NoResults />
+        )}
+        {(category && topicsLoadingStatus === RequestStatus.IN_PROGRESS) && (
+          <div className="d-flex justify-content-center p-4">
+            <Spinner animation="border" variant="primary" size="lg" />
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}
+
+TopicPostsView.propTypes = {
+  intl: intlShape.isRequired,
+};
+
+export default injectIntl(TopicPostsView);

src/discussions/in-context-topics/TopicsView.jsx

@@ -0,0 +1,121 @@
+import React, { useContext, useEffect } from 'react';
+
+import classNames from 'classnames';
+import isEmpty from 'lodash/isEmpty';
+import { useDispatch, useSelector } from 'react-redux';
+
+import { Spinner } from '@edx/paragon';
+
+import SearchInfo from '../../components/SearchInfo';
+import { RequestStatus } from '../../data/constants';
+import { DiscussionContext } from '../common/context';
+import { selectAreThreadsFiltered, selectDiscussionProvider } from '../data/selectors';
+import { clearFilter, clearSort } from '../posts/data/slices';
+import NoResults from '../posts/NoResults';
+import { handleKeyDown } from '../utils';
+import {
+  selectArchivedTopics, selectCoursewareTopics, selectFilteredTopics, selectLoadingStatus,
+  selectNonCoursewareTopics, selectTopicFilter, selectTopics,
+} from './data/selectors';
+import { setFilter } from './data/slices';
+import { fetchCourseTopicsV3 } from './data/thunks';
+import { ArchivedBaseGroup, SectionBaseGroup, Topic } from './topic';
+
+function TopicsList() {
+  const loadingStatus = useSelector(selectLoadingStatus);
+  const coursewareTopics = useSelector(selectCoursewareTopics);
+  const nonCoursewareTopics = useSelector(selectNonCoursewareTopics);
+  const archivedTopics = useSelector(selectArchivedTopics);
+
+  return (
+    <>
+      {nonCoursewareTopics?.map((topic, index) => (
+        <Topic
+          key={topic.id}
+          topic={topic}
+          showDivider={(nonCoursewareTopics.length - 1) !== index}
+        />
+      ))}
+      {coursewareTopics?.map((topic, index) => (
+        <SectionBaseGroup
+          key={topic.id}
+          section={topic?.children}
+          sectionId={topic.id}
+          sectionTitle={topic.displayName}
+          showDivider={(coursewareTopics.length - 1) !== index}
+        />
+      ))}
+      {!isEmpty(archivedTopics) && (
+        <ArchivedBaseGroup
+          archivedTopics={archivedTopics}
+          showDivider={(!isEmpty(nonCoursewareTopics) || !isEmpty(coursewareTopics))}
+        />
+      )}
+      {loadingStatus === RequestStatus.IN_PROGRESS && (
+        <div className="d-flex justify-content-center p-4">
+          <Spinner animation="border" variant="primary" size="lg" />
+        </div>
+      )}
+    </>
+  );
+}
+
+function TopicsView() {
+  const dispatch = useDispatch();
+  const { courseId } = useContext(DiscussionContext);
+  const provider = useSelector(selectDiscussionProvider);
+  const topicFilter = useSelector(selectTopicFilter);
+  const filteredTopics = useSelector(selectFilteredTopics);
+  const loadingStatus = useSelector(selectLoadingStatus);
+  const isPostsFiltered = useSelector(selectAreThreadsFiltered);
+  const topics = useSelector(selectTopics);
+
+  useEffect(() => {
+    if (provider) {
+      dispatch(fetchCourseTopicsV3(courseId));
+    }
+  }, [provider]);
+
+  useEffect(() => {
+    if (isPostsFiltered) {
+      dispatch(clearFilter());
+      dispatch(clearSort());
+    }
+  }, [isPostsFiltered]);
+
+  return (
+    <div className="d-flex flex-column h-100" data-testid="inContext-topics-view">
+      {topicFilter && (
+        <>
+          <SearchInfo
+            text={topicFilter}
+            count={filteredTopics.length}
+            loadingStatus={loadingStatus}
+            onClear={() => dispatch(setFilter(''))}
+          />
+          {filteredTopics.length === 0 && loadingStatus === RequestStatus.SUCCESSFUL && <NoResults />}
+        </>
+      )}
+      <div
+        className={classNames('list-group list-group-flush flex-fill', {
+          'justify-content-center': loadingStatus === RequestStatus.IN_PROGRESS && isEmpty(topics),
+        })}
+        role="list"
+        onKeyDown={e => handleKeyDown(e)}
+      >
+        {topicFilter ? (
+          filteredTopics?.map((topic) => (
+            <Topic
+              key={topic.id}
+              topic={topic}
+            />
+          ))
+        ) : (
+          <TopicsList />
+        )}
+      </div>
+    </div>
+  );
+}
+
+export default TopicsView;

src/discussions/in-context-topics/components/BackButton.jsx

@@ -0,0 +1,41 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+
+import { useHistory } from 'react-router-dom';
+
+import { injectIntl, intlShape } from '@edx/frontend-platform/i18n';
+import { Icon, IconButton } from '@edx/paragon';
+import { ArrowBack } from '@edx/paragon/icons';
+
+import messages from '../messages';
+
+function BackButton({ intl, path, title }) {
+  const history = useHistory();
+
+  return (
+    <>
+      <div className="d-flex py-2.5 px-3 font-weight-bold border-light-400 border-bottom">
+        <IconButton
+          src={ArrowBack}
+          iconAs={Icon}
+          style={{ padding: '18px' }}
+          size="inline"
+          onClick={() => history.push(path)}
+          alt={intl.formatMessage(messages.backAlt)}
+        />
+        <div className="d-flex flex-fill justify-content-center align-items-center mr-4.5">
+          {title}
+        </div>
+      </div>
+      <div className="border-bottom border-light-400" />
+    </>
+  );
+}
+
+BackButton.propTypes = {
+  intl: intlShape.isRequired,
+  path: PropTypes.shape({}).isRequired,
+  title: PropTypes.string.isRequired,
+};
+
+export default injectIntl(BackButton);

src/discussions/in-context-topics/components/EmptyTopics.jsx

@@ -0,0 +1,83 @@
+import React, { useContext } from 'react';
+
+import { useDispatch, useSelector } from 'react-redux';
+import { useRouteMatch } from 'react-router';
+
+import { injectIntl, intlShape } from '@edx/frontend-platform/i18n';
+
+import { ALL_ROUTES } from '../../../data/constants';
+import { DiscussionContext } from '../../common/context';
+import { useIsOnDesktop } from '../../data/hooks';
+import { selectPostThreadCount } from '../../data/selectors';
+import EmptyPage from '../../empty-posts/EmptyPage';
+import messages from '../../messages';
+import { messages as postMessages, showPostEditor } from '../../posts';
+import { selectCourseWareThreadsCount, selectTotalTopicsThreadsCount } from '../data/selectors';
+
+function EmptyTopics({ intl }) {
+  const match = useRouteMatch(ALL_ROUTES);
+  const dispatch = useDispatch();
+  const { enableInContextSidebar } = useContext(DiscussionContext);
+  const courseWareThreadsCount = useSelector(selectCourseWareThreadsCount(match.params.category));
+  const topicThreadsCount = useSelector(selectPostThreadCount);
+  // hasGlobalThreads is used to determine if there are any post available in courseware and non-courseware topics
+  const hasGlobalThreads = useSelector(selectTotalTopicsThreadsCount) > 0;
+
+  function addPost() {
+    return dispatch(showPostEditor());
+  }
+
+  const isOnDesktop = useIsOnDesktop();
+
+  let title = messages.emptyTitle;
+  let fullWidth = false;
+  let subTitle;
+  let action;
+  let actionText;
+
+  if (!isOnDesktop) {
+    return null;
+  }
+
+  if (match.params.topicId) {
+    if (topicThreadsCount > 0) {
+      title = messages.noPostSelected;
+    } else {
+      action = addPost;
+      actionText = postMessages.addAPost;
+      subTitle = messages.emptyTopic;
+      fullWidth = true;
+    }
+  } else if (match.params.category) {
+    if (enableInContextSidebar && topicThreadsCount > 0) {
+      title = messages.noPostSelected;
+    } else if (courseWareThreadsCount > 0) {
+      title = messages.noTopicSelected;
+    } else {
+      action = addPost;
+      actionText = postMessages.addAPost;
+      subTitle = messages.emptyTopic;
+      fullWidth = true;
+    }
+  } else if (hasGlobalThreads) {
+    title = messages.noTopicSelected;
+  } else {
+    fullWidth = true;
+  }
+
+  return (
+    <EmptyPage
+      title={intl.formatMessage(title)}
+      subTitle={subTitle && intl.formatMessage(subTitle)}
+      action={action}
+      actionText={actionText && intl.formatMessage(actionText)}
+      fullWidth={fullWidth}
+    />
+  );
+}
+
+EmptyTopics.propTypes = {
+  intl: intlShape.isRequired,
+};
+
+export default injectIntl(EmptyTopics);

src/discussions/in-context-topics/components/NoResults.jsx

@@ -0,0 +1,29 @@
+import { useSelector } from 'react-redux';
+
+import { injectIntl, intlShape } from '@edx/frontend-platform/i18n';
+
+import { selectTopics } from '../data/selectors';
+import messages from '../messages';
+
+function NoResults({ intl }) {
+  const topics = useSelector(selectTopics);
+
+  let title = messages.nothingHere;
+  const helpMessage = '';
+  if (topics.length === 0) {
+    title = messages.noTopicExists;
+  }
+
+  return (
+    <div className="h-100 mt-5 align-self-center mx-auto w-50 d-flex flex-column justify-content-center text-center">
+      <h4 className="font-weight-normal text-primary-500">{intl.formatMessage(title)}</h4>
+      { helpMessage && <small className="font-weight-normal text-gray-700">{intl.formatMessage(helpMessage)}</small>}
+    </div>
+  );
+}
+
+NoResults.propTypes = {
+  intl: intlShape.isRequired,
+};
+
+export default injectIntl(NoResults);

src/discussions/in-context-topics/components/index.js

@@ -0,0 +1,4 @@
+/* eslint-disable import/prefer-default-export */
+export { default as BackButton } from './BackButton';
+export { default as EmptyTopic } from './EmptyTopics';
+export { default as NoResults } from './NoResults';

src/discussions/in-context-topics/data/api.js

@@ -0,0 +1,11 @@
+/* eslint-disable import/prefer-default-export */
+import { camelCaseObject } from '@edx/frontend-platform';
+import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
+
+import { getApiBaseUrl } from '../../../data/constants';
+
+export async function getCourseTopicsV3(courseId) {
+  const url = `${getApiBaseUrl()}/api/discussion/v3/course_topics/${courseId}`;
+  const { data } = await getAuthenticatedHttpClient().get(url);
+  return camelCaseObject(data);
+}

src/discussions/in-context-topics/data/index.js

@@ -0,0 +1 @@
+export * from './slices';

src/discussions/in-context-topics/data/selectors.js

@@ -0,0 +1,67 @@
+/* eslint-disable import/prefer-default-export */
+
+import { createSelector } from '@reduxjs/toolkit';
+
+export const selectTopicFilter = state => state.inContextTopics.filter.trim().toLowerCase();
+
+export const selectTopics = state => state.inContextTopics.topics;
+
+export const selectCoursewareTopics = state => state.inContextTopics.coursewareTopics;
+
+export const selectNonCoursewareTopics = state => state.inContextTopics.nonCoursewareTopics;
+
+export const selectNonCoursewareIds = state => state.inContextTopics.nonCoursewareIds;
+
+export const selectUnits = state => state.inContextTopics.units;
+
+export const selectSubsectionUnits = subsectionId => state => state.inContextTopics.units?.filter(
+  unit => unit.parentId === subsectionId,
+);
+
+export const selectSubsection = category => createSelector(
+  selectCoursewareTopics,
+  (coursewareTopics) => (
+    coursewareTopics?.map((topic) => topic?.children)?.flat()?.find((topic) => topic.id === category)
+  ),
+);
+
+export const selectArchivedTopics = state => state.inContextTopics.archivedTopics;
+
+export const selectArchivedTopic = topic => createSelector(
+  selectArchivedTopics,
+  (archivedTopics) => (
+    archivedTopics?.find((archivedTopic) => archivedTopic.id === topic)
+  ),
+);
+
+export const selectLoadingStatus = state => state.inContextTopics.status;
+
+export const selectFilteredTopics = createSelector(
+  selectUnits,
+  selectNonCoursewareTopics,
+  selectTopicFilter,
+  (units, nonCoursewareTopics, filter) => (
+    (units && nonCoursewareTopics && filter) && [...units, ...nonCoursewareTopics]?.filter(
+      topic => topic.name.toLowerCase().includes(filter),
+    )
+  ),
+);
+
+export const selectTotalTopicsThreadsCount = createSelector(
+  selectUnits,
+  selectNonCoursewareTopics,
+  (units, nonCoursewareTopics) => (
+    (units && nonCoursewareTopics) && [...units, ...nonCoursewareTopics]?.reduce((total, topic) => (
+      total + topic.threadCounts.discussion + topic.threadCounts.question
+    ), 0)
+  ),
+);
+
+export const selectCourseWareThreadsCount = category => createSelector(
+  selectSubsectionUnits(category),
+  (units) => (
+    units?.reduce((total, unit) => (
+      total + unit.threadCounts.discussion + unit.threadCounts.question
+    ), 0)
+  ),
+);

src/discussions/in-context-topics/data/slices.js

@@ -0,0 +1,51 @@
+/* eslint-disable no-param-reassign,import/prefer-default-export */
+import { createSlice } from '@reduxjs/toolkit';
+
+import { RequestStatus } from '../../../data/constants';
+
+const topicsSlice = createSlice({
+  name: 'inContextTopics',
+  initialState: {
+    status: RequestStatus.IN_PROGRESS,
+    topics: [],
+    coursewareTopics: [],
+    nonCoursewareTopics: [],
+    nonCoursewareIds: [],
+    units: [],
+    archivedTopics: [],
+    filter: '',
+  },
+  reducers: {
+    fetchCourseTopicsRequest: (state) => {
+      state.status = RequestStatus.IN_PROGRESS;
+    },
+    fetchCourseTopicsSuccess: (state, { payload }) => {
+      state.status = RequestStatus.SUCCESSFUL;
+      state.topics = payload.topics;
+      state.coursewareTopics = payload.coursewareTopics;
+      state.nonCoursewareTopics = payload.nonCoursewareTopics;
+      state.nonCoursewareIds = payload.nonCoursewareIds;
+      state.units = payload.units;
+      state.archivedTopics = payload.archivedTopics;
+    },
+    fetchCourseTopicsFailed: (state) => {
+      state.status = RequestStatus.FAILED;
+    },
+    fetchCourseTopicsDenied: (state) => {
+      state.status = RequestStatus.DENIED;
+    },
+    setFilter: (state, { payload }) => {
+      state.filter = payload;
+    },
+  },
+});
+
+export const {
+  fetchCourseTopicsRequest,
+  fetchCourseTopicsSuccess,
+  fetchCourseTopicsFailed,
+  setFilter,
+  setSortBy,
+} = topicsSlice.actions;
+
+export const inContextTopicsReducer = topicsSlice.reducer;

src/discussions/in-context-topics/data/thunks.js

@@ -0,0 +1,64 @@
+/* eslint-disable import/prefer-default-export */
+import { reduce } from 'lodash';
+
+import { logError } from '@edx/frontend-platform/logging';
+
+import { getCourseTopicsV3 } from './api';
+import { fetchCourseTopicsFailed, fetchCourseTopicsRequest, fetchCourseTopicsSuccess } from './slices';
+
+function normalizeTopicsV3(topics) {
+  const coursewareUnits = reduce(topics, (arrayOfUnits, chapter) => {
+    if (chapter?.children) {
+      return [
+        ...arrayOfUnits,
+        ...reduce(chapter.children, (units, sequential) => {
+          if (sequential?.children) {
+            return [
+              ...units,
+              ...sequential.children.map((unit) => ({
+                ...unit,
+                parentId: sequential.id,
+                parentTitle: sequential.displayName,
+              })),
+            ];
+          }
+          return units;
+        }, []),
+      ];
+    }
+    return arrayOfUnits;
+  }, []);
+
+  const archivedTopics = reduce(topics, (arrayOfArchivedTopics, topic) => {
+    if (topic.id === 'archived') {
+      return topic.children;
+    }
+    return arrayOfArchivedTopics;
+  }, []);
+
+  const coursewareTopics = topics.filter((topic) => topic.courseware);
+  const nonCoursewareTopics = topics.filter((topic) => !topic.courseware && topic.enabledInContext);
+  const nonCoursewareIds = nonCoursewareTopics?.map((topic) => topic.id);
+
+  return {
+    topics,
+    units: coursewareUnits,
+    coursewareTopics,
+    nonCoursewareTopics,
+    nonCoursewareIds,
+    archivedTopics,
+  };
+}
+
+export function fetchCourseTopicsV3(courseId) {
+  return async (dispatch) => {
+    try {
+      dispatch(fetchCourseTopicsRequest({ courseId }));
+      const data = await getCourseTopicsV3(courseId);
+      dispatch(fetchCourseTopicsSuccess(normalizeTopicsV3(data)));
+    } catch (error) {
+      dispatch(fetchCourseTopicsFailed());
+      logError(error);
+    }
+  };
+}

src/discussions/in-context-topics/index.js

@@ -0,0 +1,3 @@
+/* eslint-disable import/prefer-default-export */
+export { default as TopicPostsView } from './TopicPostsView';
+export { default as TopicsView } from './TopicsView';

src/discussions/in-context-topics/messages.js

@@ -0,0 +1,79 @@
+import { defineMessages } from '@edx/frontend-platform/i18n';
+
+const messages = defineMessages({
+  backAlt: {
+    id: 'discussions.topics.backAlt',
+    defaultMessage: 'Back to topics list',
+    description: 'Display back button text used to navigate back to topics list',
+  },
+  discussions: {
+    id: 'discussions.topics.discussions',
+    defaultMessage: `{count, plural,
+      =0 {Discussion}
+      one {# Discussion}
+      other {# Discussions}
+    }`,
+    description: 'Display tooltip text used to indicate how many posts type are discussion',
+  },
+  questions: {
+    id: 'discussions.topics.questions',
+    defaultMessage: `{count, plural,
+      =0 {Question}
+      one {# Question}
+      other {# Questions}
+    }`,
+    description: 'Display tooltip text used to indicate how many posts type are questions',
+  },
+  reported: {
+    id: 'discussions.topics.reported',
+    defaultMessage: '{reported} reported',
+    description: 'Display tooltip text used to indicate how many posts are reported',
+  },
+  previouslyReported: {
+    id: 'discussions.topics.previouslyReported',
+    defaultMessage: '{previouslyReported} previously reported',
+    description: 'Display tooltip text used to indicate how many posts are previously reported',
+  },
+  searchTopics: {
+    id: 'discussions.topics.find.label',
+    defaultMessage: 'Search topics',
+    description: 'Placeholder text in search bar',
+  },
+  unnamedSection: {
+    id: 'discussions.topics.unnamed.section.label',
+    defaultMessage: 'Unnamed Section',
+    description: 'Text to display in place of section name if section name is empty',
+  },
+  unnamedSubsection: {
+    id: 'discussions.topics.unnamed.subsection.label',
+    defaultMessage: 'Unnamed Subsection',
+    description: 'Text to display in place of subsection name if subsection name is empty',
+  },
+  unnamedTopic: {
+    id: 'discussions.subtopics.unnamed.topic.label',
+    defaultMessage: 'Unnamed Topic',
+    description: 'Text to display in place of topic name if topic name is empty',
+  },
+  noTopicExists: {
+    id: 'discussions.topics.title',
+    defaultMessage: 'No topic exists',
+    description: 'Text to display in place of topic list if topic does not exist',
+  },
+  createTopic: {
+    id: 'discussions.topics.createTopic',
+    defaultMessage: 'Please contact you admin to create a topic',
+    description: 'Helping Text to display in place of topic list if topic does not exist',
+  },
+  nothingHere: {
+    id: 'discussions.topics.nothing',
+    defaultMessage: 'Nothing here yet',
+    description: 'Helping Text to display if nothing here yet',
+  },
+  archivedTopics: {
+    id: 'discussions.topics.archived.label',
+    defaultMessage: 'Archived',
+    description: 'Heading for displaying topics that are archived.',
+  },
+});
+
+export default messages;

src/discussions/in-context-topics/topic-search/TopicSearchBar.jsx

@@ -0,0 +1,64 @@
+import React, { useContext, useEffect } from 'react';
+
+import { useDispatch, useSelector } from 'react-redux';
+
+import { injectIntl, intlShape } from '@edx/frontend-platform/i18n';
+import { Icon, SearchField } from '@edx/paragon';
+import { Search as SearchIcon } from '@edx/paragon/icons';
+
+import { DiscussionContext } from '../../common/context';
+import postsMessages from '../../posts/post-actions-bar/messages';
+import { setFilter as setTopicFilter } from '../data/slices';
+
+function TopicSearchBar({ intl }) {
+  const dispatch = useDispatch();
+  const { page } = useContext(DiscussionContext);
+  const topicSearch = useSelector(({ inContextTopics }) => inContextTopics.filter);
+  let searchValue = '';
+
+  const onClear = () => {
+    dispatch(setTopicFilter(''));
+  };
+
+  const onChange = (query) => {
+    searchValue = query;
+  };
+
+  const onSubmit = (query) => {
+    if (query === '') {
+      return;
+    }
+    dispatch(setTopicFilter(query));
+  };
+
+  useEffect(() => onClear(), [page]);
+
+  return (
+    <>
+      <SearchField.Advanced
+        onClear={onClear}
+        onChange={onChange}
+        onSubmit={onSubmit}
+        value={topicSearch}
+      >
+        <SearchField.Label />
+        <SearchField.Input
+          style={{ paddingRight: '1rem' }}
+          placeholder={intl.formatMessage(postsMessages.search, { page: 'topics' })}
+        />
+        <span className="mt-auto mb-auto mr-2.5 pointer-cursor-hover">
+          <Icon
+            src={SearchIcon}
+            onClick={() => onSubmit(searchValue)}
+          />
+        </span>
+      </SearchField.Advanced>
+    </>
+  );
+}
+
+TopicSearchBar.propTypes = {
+  intl: intlShape.isRequired,
+};
+
+export default injectIntl(TopicSearchBar);

src/discussions/in-context-topics/topic-search/TopicSearchResultBar.jsx

@@ -0,0 +1,30 @@
+import React from 'react';
+
+import { useDispatch } from 'react-redux';
+
+import { injectIntl, intlShape } from '@edx/frontend-platform/i18n';
+import { SearchField } from '@edx/paragon';
+
+import { setFilter } from '../data';
+import messages from '../messages';
+
+function TopicSearchResultBar({ intl }) {
+  const dispatch = useDispatch();
+
+  return (
+    <div className="d-flex flex-row p-1 align-items-center">
+      <SearchField
+        className="flex-fill m-1 border-0"
+        placeholder={intl.formatMessage(messages.searchTopics)}
+        onSubmit={(query) => dispatch(setFilter(query))}
+        onChange={(query) => dispatch(setFilter(query))}
+      />
+    </div>
+  );
+}
+
+TopicSearchResultBar.propTypes = {
+  intl: intlShape.isRequired,
+};
+
+export default injectIntl(TopicSearchResultBar);

src/discussions/in-context-topics/topic-search/index.js

@@ -0,0 +1,3 @@
+/* eslint-disable import/prefer-default-export */
+export { default as TopicSearchBar } from './TopicSearchBar';
+export { default as TopicSearchResultBar } from './TopicSearchResultBar';

src/discussions/in-context-topics/topic/ArchivedBaseGroup.jsx

@@ -0,0 +1,48 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+
+import { injectIntl, intlShape } from '@edx/frontend-platform/i18n';
+
+import messages from '../messages';
+import Topic, { topicShape } from './Topic';
+
+function ArchivedBaseGroup({
+  archivedTopics,
+  showDivider,
+  intl,
+}) {
+  return (
+    <>
+      {showDivider && (
+        <>
+          <div className="divider border-top border-light-500" />
+          <div className="divider pt-1 bg-light-300" />
+        </>
+      )}
+      <div
+        className="discussion-topic-group d-flex flex-column text-primary-500"
+        data-testid="archived-group"
+      >
+        <div className="pt-3 px-4 font-weight-bold">{intl.formatMessage(messages.archivedTopics)}</div>
+        {archivedTopics?.map((topic, index) => (
+          <Topic
+            key={topic.id}
+            topic={topic}
+            showDivider={(archivedTopics.length - 1) !== index}
+          />
+        ))}
+      </div>
+    </>
+  );
+}
+
+ArchivedBaseGroup.propTypes = {
+  archivedTopics: PropTypes.arrayOf(topicShape).isRequired,
+  showDivider: PropTypes.bool,
+  intl: intlShape.isRequired,
+};
+
+ArchivedBaseGroup.defaultProps = {
+  showDivider: false,
+};
+export default injectIntl(ArchivedBaseGroup);

src/discussions/in-context-topics/topic/SectionBaseGroup.jsx

@@ -0,0 +1,90 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+
+import classNames from 'classnames';
+import { useParams } from 'react-router';
+import { Link } from 'react-router-dom';
+
+import { injectIntl, intlShape } from '@edx/frontend-platform/i18n';
+
+import { Routes } from '../../../data/constants';
+import { discussionsPath } from '../../utils';
+import messages from '../messages';
+import { topicShape } from './Topic';
+
+function SectionBaseGroup({
+  section,
+  sectionTitle,
+  sectionId,
+  showDivider,
+  intl,
+}) {
+  const { courseId } = useParams();
+  const isSelected = (id) => window.location.pathname.includes(id);
+  const sectionUrl = (id) => discussionsPath(Routes.TOPICS.CATEGORY, {
+    courseId,
+    category: id,
+  });
+
+  return (
+    <div
+      className="discussion-topic-group d-flex flex-column text-primary-500"
+      data-section-id={sectionId}
+      data-testid="section-group"
+    >
+      <div className="pt-3 px-4 font-weight-bold">
+        {sectionTitle || intl.formatMessage(messages.unnamedSection)}
+      </div>
+      {section.map((subsection, index) => (
+        <Link
+          className={classNames('subsection p-0 text-decoration-none text-primary-500', {
+            'border-bottom border-light-400': (section.length - 1 !== index),
+          })}
+          key={subsection.id}
+          role="option"
+          data-subsection-id={subsection.id}
+          data-testid="subsection-group"
+          to={sectionUrl(subsection.id)}
+          onClick={() => isSelected(subsection.id)}
+          aria-current={isSelected(section.id) ? 'page' : undefined}
+          tabIndex={(isSelected(subsection.id) || index === 0) ? 0 : -1}
+        >
+          <div className="d-flex flex-row py-3.5 px-4">
+            <div className="d-flex flex-column flex-fill" style={{ minWidth: 0 }}>
+              <div className="d-flex flex-column justify-content-start mw-100 flex-fill">
+                <div className="topic-name text-truncate">
+                  {subsection?.displayName || intl.formatMessage(messages.unnamedSubsection)}
+                </div>
+              </div>
+            </div>
+          </div>
+        </Link>
+      ))}
+      {showDivider && (
+        <>
+          <div className="divider border-top border-light-500" />
+          <div className="divider pt-1 bg-light-300" />
+        </>
+      )}
+    </div>
+  );
+}
+
+SectionBaseGroup.propTypes = {
+  section: PropTypes.arrayOf(PropTypes.shape({
+    id: PropTypes.string,
+    blockId: PropTypes.string,
+    lmsWebUrl: PropTypes.string,
+    legacyWebUrl: PropTypes.string,
+    studentViewUrl: PropTypes.string,
+    type: PropTypes.string,
+    displayName: PropTypes.string,
+    children: PropTypes.arrayOf(topicShape),
+  })).isRequired,
+  sectionTitle: PropTypes.string.isRequired,
+  sectionId: PropTypes.string.isRequired,
+  showDivider: PropTypes.bool.isRequired,
+  intl: intlShape.isRequired,
+};
+
+export default injectIntl(SectionBaseGroup);

src/discussions/in-context-topics/topic/Topic.jsx

@@ -0,0 +1,155 @@
+/* eslint-disable no-unused-vars, react/forbid-prop-types */
+import React from 'react';
+import PropTypes from 'prop-types';
+
+import classNames from 'classnames';
+import { useSelector } from 'react-redux';
+import { useParams } from 'react-router';
+import { Link } from 'react-router-dom';
+
+import { injectIntl, intlShape } from '@edx/frontend-platform/i18n';
+import { Icon, OverlayTrigger, Tooltip } from '@edx/paragon';
+import { HelpOutline, PostOutline, Report } from '@edx/paragon/icons';
+
+import { Routes } from '../../../data/constants';
+import { selectUserHasModerationPrivileges, selectUserIsGroupTa } from '../../data/selectors';
+import { discussionsPath } from '../../utils';
+import messages from '../messages';
+
+function Topic({
+  topic,
+  showDivider,
+  index,
+  intl,
+}) {
+  const { courseId } = useParams();
+  const userHasModerationPrivileges = useSelector(selectUserHasModerationPrivileges);
+  const userIsGroupTa = useSelector(selectUserIsGroupTa);
+  const { inactiveFlags, activeFlags } = topic;
+  const canSeeReportedStats = (activeFlags || inactiveFlags) && (userHasModerationPrivileges || userIsGroupTa);
+  const isSelected = (id) => window.location.pathname.includes(id);
+  const topicUrl = discussionsPath(Routes.TOPICS.TOPIC, {
+    courseId,
+    topicId: topic.id,
+  });
+
+  return (
+    <>
+      <Link
+        className={classNames('discussion-topic p-0 text-decoration-none text-primary-500', {
+          'border-light-400 border-bottom': showDivider,
+        })}
+        data-topic-id={topic.id}
+        to={topicUrl}
+        onClick={() => isSelected(topic.id)}
+        aria-current={isSelected(topic.id) ? 'page' : undefined}
+        role="option"
+        tabIndex={(isSelected(topic.id) || index === 0) ? 0 : -1}
+      >
+        <div className="d-flex flex-row pt-2.5 pb-2 px-4">
+          <div className="d-flex flex-column flex-fill" style={{ minWidth: 0 }}>
+            <div className="d-flex flex-column justify-content-start mw-100 flex-fill">
+              <div className="topic-name text-truncate">
+                {topic?.name || topic?.displayName || intl.formatMessage(messages.unnamedTopicSubCategories)}
+              </div>
+            </div>
+            <div className="d-flex align-items-center mt-2.5" style={{ marginBottom: '2px' }}>
+              <OverlayTrigger
+                overlay={(
+                  <Tooltip>
+                    <div className="d-flex flex-column align-items-start">
+                      {intl.formatMessage(messages.discussions, {
+                        count: topic.threadCounts?.discussion || 0,
+                      })}
+                    </div>
+                  </Tooltip>
+                  )}
+              >
+                <div className="d-flex align-items-center mr-3.5">
+                  <Icon src={PostOutline} className="icon-size mr-2" />
+                  {topic.threadCounts?.discussion || 0}
+                </div>
+              </OverlayTrigger>
+              <OverlayTrigger
+                overlay={(
+                  <Tooltip>
+                    <div className="d-flex flex-column align-items-start">
+                      {intl.formatMessage(messages.questions, {
+                        count: topic.threadCounts?.question || 0,
+                      })}
+                    </div>
+                  </Tooltip>
+                )}
+              >
+                <div className="d-flex align-items-center mr-3.5">
+                  <Icon src={HelpOutline} className="icon-size mr-2" />
+                  {topic.threadCounts?.question || 0}
+                </div>
+              </OverlayTrigger>
+              {Boolean(canSeeReportedStats) && (
+                <OverlayTrigger
+                  overlay={(
+                    <Tooltip>
+                      <div className="d-flex flex-column align-items-start">
+                        {Boolean(activeFlags) && (
+                        <span>
+                          {intl.formatMessage(messages.reported, { reported: activeFlags })}
+                        </span>
+                        )}
+                        {Boolean(inactiveFlags) && (
+                        <span>
+                          {intl.formatMessage(messages.previouslyReported, { previouslyReported: inactiveFlags })}
+                        </span>
+                        )}
+                      </div>
+                    </Tooltip>
+                    )}
+                >
+                  <div className="d-flex align-items-center">
+                    <Icon src={Report} className="icon-size mr-2 text-danger" />
+                    {activeFlags}{Boolean(inactiveFlags) && `/${inactiveFlags}`}
+                  </div>
+                </OverlayTrigger>
+              )}
+            </div>
+          </div>
+        </div>
+      </Link>
+      {!showDivider && (
+        <>
+          <div className="divider border-top border-light-500" />
+          <div className="divider pt-1 bg-light-300" />
+        </>
+      )}
+    </>
+  );
+}
+
+export const topicShape = PropTypes.shape({
+  id: PropTypes.string,
+  usage_key: PropTypes.string,
+  name: PropTypes.string,
+  thread_counts: PropTypes.shape({
+    discussions: PropTypes.number,
+    questions: PropTypes.number,
+  }),
+  enabled_in_context: PropTypes.bool,
+  flags: PropTypes.number,
+});
+
+Topic.propTypes = {
+  intl: intlShape.isRequired,
+  topic: topicShape,
+  showDivider: PropTypes.bool,
+  index: PropTypes.number,
+};
+
+Topic.defaultProps = {
+  showDivider: true,
+  index: -1,
+  topic: {
+    usage_key: '',
+  },
+};
+
+export default injectIntl(Topic);

src/discussions/in-context-topics/topic/index.js

@@ -0,0 +1,4 @@
+/* eslint-disable import/prefer-default-export */
+export { default as ArchivedBaseGroup } from './ArchivedBaseGroup';
+export { default as SectionBaseGroup } from './SectionBaseGroup';
+export { default as Topic } from './Topic';

src/discussions/learners/LearnerPostsView.test.jsx

@@ -14,15 +14,17 @@ import { AppProvider } from '@edx/frontend-platform/react';
 import { initializeStore } from '../../store';
 import { executeThunk } from '../../test-utils';
 import { DiscussionContext } from '../common/context';
-import { courseConfigApiUrl } from '../data/api';
+import { getCourseConfigApiUrl } from '../data/api';
 import { fetchCourseConfig } from '../data/thunks';
-import { coursesApiUrl } from './data/api';
+import { getCoursesApiUrl } from './data/api';
 import LearnerPostsView from './LearnerPostsView';
 
 import './data/__factories__';
 
 let store;
 let axiosMock;
+const coursesApiUrl = getCoursesApiUrl();
+const courseConfigApiUrl = getCourseConfigApiUrl();
 const courseId = 'course-v1:edX+TestX+Test_Course';
 const username = 'abc123';
 

src/discussions/learners/LearnersView.test.jsx

@@ -13,9 +13,9 @@ import { AppProvider } from '@edx/frontend-platform/react';
 
 import { initializeStore } from '../../store';
 import { executeThunk } from '../../test-utils';
-import { courseConfigApiUrl } from '../data/api';
+import { getCourseConfigApiUrl } from '../data/api';
 import { fetchCourseConfig } from '../data/thunks';
-import { coursesApiUrl, userProfileApiUrl } from './data/api';
+import { getCoursesApiUrl, getUserProfileApiUrl } from './data/api';
 import { fetchLearners } from './data/thunks';
 import LearnersView from './LearnersView';
 
@@ -23,6 +23,9 @@ import './data/__factories__';
 
 let store;
 let axiosMock;
+const coursesApiUrl = getCoursesApiUrl();
+const courseConfigApiUrl = getCourseConfigApiUrl();
+const userProfileApiUrl = getUserProfileApiUrl();
 const courseId = 'course-v1:edX+TestX+Test_Course';
 
 function renderComponent() {

src/discussions/learners/data/api.js

@@ -8,10 +8,8 @@ ensureConfig([
   'LMS_BASE_URL',
 ], 'Posts API service');
 
-const apiBaseUrl = getConfig().LMS_BASE_URL;
-
-export const coursesApiUrl = `${apiBaseUrl}/api/discussion/v1/courses/`;
-export const userProfileApiUrl = `${apiBaseUrl}/api/user/v1/accounts`;
+export const getCoursesApiUrl = () => `${getConfig().LMS_BASE_URL}/api/discussion/v1/courses/`;
+export const getUserProfileApiUrl = () => `${getConfig().LMS_BASE_URL}/api/user/v1/accounts`;
 
 /**
  * Fetches all the learners in the given course.
@@ -20,7 +18,7 @@ export const userProfileApiUrl = `${apiBaseUrl}/api/user/v1/accounts`;
  * @returns {Promise<{}>}
  */
 export async function getLearners(courseId, params) {
-  const url = `${coursesApiUrl}${courseId}/activity_stats/`;
+  const url = `${getCoursesApiUrl()}${courseId}/activity_stats/`;
   const { data } = await getAuthenticatedHttpClient().get(url, { params });
   return data;
 }
@@ -30,7 +28,7 @@ export async function getLearners(courseId, params) {
  * @param {string} usernames
  */
 export async function getUserProfiles(usernames) {
-  const url = `${userProfileApiUrl}?username=${usernames.join()}`;
+  const url = `${getUserProfileApiUrl()}?username=${usernames.join()}`;
   const { data } = await getAuthenticatedHttpClient().get(url);
   return data;
 }
@@ -67,7 +65,7 @@ export async function getUserPosts(courseId, {
   countFlagged,
   cohort,
 } = {}) {
-  const learnerPostsApiUrl = `${coursesApiUrl}${courseId}/learner/`;
+  const learnerPostsApiUrl = `${getCoursesApiUrl()}${courseId}/learner/`;
 
   const params = snakeCaseObject({
     page,

src/discussions/learners/learner-post-filter-bar/LearnerPostFilterBar.jsx

@@ -4,6 +4,8 @@ import { isEmpty } from 'lodash';
 import { useDispatch, useSelector } from 'react-redux';
 import { useParams } from 'react-router-dom';
 
+import { sendTrackEvent } from '@edx/frontend-platform/analytics';
+
 import FilterBar from '../../../components/FilterBar';
 import { selectCourseCohorts } from '../../cohorts/data/selectors';
 import { fetchCourseCohorts } from '../../cohorts/data/thunks';
@@ -39,12 +41,20 @@ function LearnerPostFilterBar() {
 
   const handleFilterChange = (event) => {
     const { name, value } = event.currentTarget;
+    const filterContentEventProperties = {
+      statusFilter: postFilter.status,
+      threadTypeFilter: postFilter.postType,
+      sortFilter: postFilter.orderBy,
+      cohortFilter: postFilter.cohort,
+      triggeredBy: name,
+    };
     if (name === 'postType') {
       if (postFilter.postType !== value) {
         dispatch(setPostFilter({
           ...postFilter,
           postType: value,
         }));
+        filterContentEventProperties.threadTypeFilter = value;
       }
     } else if (name === 'status') {
       if (postFilter.status !== value) {
@@ -52,6 +62,7 @@ function LearnerPostFilterBar() {
           ...postFilter,
           status: value,
         }));
+        filterContentEventProperties.statusFilter = value;
       }
     } else if (name === 'orderBy') {
       if (postFilter.orderBy !== value) {
@@ -59,6 +70,7 @@ function LearnerPostFilterBar() {
           ...postFilter,
           orderBy: value,
         }));
+        filterContentEventProperties.sortFilter = value;
       }
     } else if (name === 'cohort') {
       if (postFilter.cohort !== value) {
@@ -66,8 +78,10 @@ function LearnerPostFilterBar() {
           ...postFilter,
           cohort: value,
         }));
+        filterContentEventProperties.cohortFilter = value;
       }
     }
+    sendTrackEvent('edx.forum.filter.content', filterContentEventProperties);
   };
 
   useEffect(() => {

src/discussions/learners/learner/LearnerCard.jsx

@@ -16,9 +16,9 @@ function LearnerCard({
   learner,
   courseId,
 }) {
-  const { inContext, learnerUsername } = useContext(DiscussionContext);
+  const { enableInContextSidebar, learnerUsername } = useContext(DiscussionContext);
   const linkUrl = discussionsPath(Routes.LEARNERS.POSTS, {
-    0: inContext ? 'in-context' : undefined,
+    0: enableInContextSidebar ? 'in-context' : undefined,
     learnerUsername: learner.username,
     courseId,
   });

src/discussions/learners/learner/LearnerFilterBar.jsx

@@ -4,6 +4,7 @@ import PropTypes from 'prop-types';
 import classNames from 'classnames';
 import { useDispatch, useSelector } from 'react-redux';
 
+import { sendTrackEvent } from '@edx/frontend-platform/analytics';
 import { injectIntl, intlShape } from '@edx/frontend-platform/i18n';
 import { Collapsible, Form, Icon } from '@edx/paragon';
 import { Check, Tune } from '@edx/paragon/icons';
@@ -58,6 +59,12 @@ function LearnerFilterBar({
 
     if (name === 'sort') {
       dispatch(setSortedBy(value));
+      sendTrackEvent(
+        'edx.forum.sort.user',
+        {
+          sort: value,
+        },
+      );
     }
   };
 

src/discussions/messages.js

@@ -31,6 +31,11 @@ const messages = defineMessages({
     defaultMessage: 'Delete',
     description: 'Action to delete a post or comment',
   },
+  confirmationConfirm: {
+    id: 'discussions.confirmation.button.confirm',
+    defaultMessage: 'Confirm',
+    description: 'Confirm button shown on confirmation dialog',
+  },
   closeAction: {
     id: 'discussions.actions.close',
     defaultMessage: 'Close',
@@ -71,16 +76,11 @@ const messages = defineMessages({
     defaultMessage: 'Unmark as answered',
     description: 'Action to unmark a comment as answering a post',
   },
-  deleteConfirmationCancel: {
-    id: 'discussions.delete.confirmation.button.cancel',
+  confirmationCancel: {
+    id: 'discussions.modal.confirmation.button.cancel',
     defaultMessage: 'Cancel',
     description: 'Cancel button shown on delete confirmation dialog',
   },
-  deleteConfirmationDelete: {
-    id: 'discussions.delete.confirmation.button.delete',
-    defaultMessage: 'Delete',
-    description: 'Delete button shown on delete confirmation dialog',
-  },
   emptyAllTopics: {
     id: 'discussions.empty.allTopics',
     defaultMessage:
@@ -185,8 +185,8 @@ const messages = defineMessages({
   },
   blackoutDiscussionInformation: {
     id: 'discussion.blackoutBanner.information',
-    defaultMessage: 'Blackout dates are currently active. Posting in discussions is unavailable at this time.',
-    description: 'Informative text when discussions blackout is active',
+    defaultMessage: 'Posting in discussions is temporarily disabled by the course team',
+    description: 'Informative text when discussion posting is disabled',
   },
   imageWarningMessage: {
     id: 'discussions.editor.image.warning.message',

src/discussions/navigation/breadcrumb-menu/BreadcrumbMenu.jsx

@@ -1,90 +0,0 @@
-import React, { useContext } from 'react';
-
-import { useSelector } from 'react-redux';
-
-import { Routes } from '../../../data/constants';
-import { selectBlocks, selectChapters } from '../../../data/selectors';
-import { DiscussionContext } from '../../common/context';
-import { selectTopic } from '../../topics/data/selectors';
-import { discussionsPath } from '../../utils';
-import BreadcrumbDropdown from './BreadcrumbDropdown';
-
-function BreadcrumbMenu() {
-  const {
-    courseId,
-    topicId,
-    category,
-  } = useContext(DiscussionContext);
-  const blocks = useSelector(selectBlocks);
-  const chapters = useSelector(selectChapters);
-  const blockKey = useSelector(selectTopic(topicId))?.usageKey || category;
-
-  let currentChapter = null;
-  let currentVertical = null;
-  let currentSequential = null;
-  if (!blocks[blockKey]) {
-    // Data is still loading
-    return null;
-  }
-  if (blocks[blockKey].type === 'chapter') {
-    currentChapter = blockKey;
-  } else if (blocks[blockKey].type === 'sequential') {
-    currentSequential = blockKey;
-    currentChapter = blocks[currentSequential].parent;
-  } else if (blocks[blockKey].type === 'vertical') {
-    currentVertical = blockKey;
-    currentSequential = blocks[currentVertical].parent;
-    currentChapter = blocks[currentSequential].parent;
-  }
-
-  const getItemDisplayName = itemId => blocks[itemId]?.displayName;
-  const getItemPath = itemId => discussionsPath(Routes.TOPICS.CATEGORY, {
-    courseId,
-    category: itemId,
-  });
-
-  return (
-    <div className="breadcrumb-menu d-flex flex-row bg-light-200 box-shadow-down-1 px-2.5 py-1">
-      <BreadcrumbDropdown
-        currentItem={currentChapter}
-        showAllPath={discussionsPath(Routes.TOPICS.ALL, { courseId })}
-        items={chapters}
-        itemPathFunc={getItemPath}
-        itemActiveFunc={item => item === currentChapter}
-        itemLabelFunc={getItemDisplayName}
-      />
-      {currentChapter
-        && (
-          <>
-            <div className="d-flex py-2">/</div>
-            <BreadcrumbDropdown
-              currentItem={currentSequential}
-              showAllPath={getItemPath(currentChapter)}
-              items={blocks[currentChapter].children}
-              itemPathFunc={getItemPath}
-              itemActiveFunc={seqId => seqId === currentChapter}
-              itemLabelFunc={getItemDisplayName}
-            />
-          </>
-        )}
-      {currentSequential
-        && (
-          <>
-            <div className="d-flex py-2">/</div>
-            <BreadcrumbDropdown
-              currentItem={currentVertical}
-              showAllPath={getItemPath(currentSequential)}
-              items={blocks[currentSequential].children}
-              itemPathFunc={getItemPath}
-              itemActiveFunc={vertId => vertId === currentChapter}
-              itemLabelFunc={getItemDisplayName}
-            />
-          </>
-        )}
-    </div>
-  );
-}
-
-BreadcrumbMenu.propTypes = {};
-
-export default BreadcrumbMenu;

src/discussions/navigation/breadcrumb-menu/BreadcrumbMenu.test.jsx

@@ -1,151 +0,0 @@
-import React from 'react';
-
-import {
-  act, fireEvent, render, screen, waitFor,
-} from '@testing-library/react';
-import MockAdapter from 'axios-mock-adapter';
-import { IntlProvider } from 'react-intl';
-import { MemoryRouter, Route } from 'react-router';
-import { Factory } from 'rosie';
-
-import { initializeMockApp } from '@edx/frontend-platform';
-import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
-import { AppProvider } from '@edx/frontend-platform/react';
-
-import { getBlocksAPIResponse } from '../../../data/__factories__';
-import { blocksAPIURL } from '../../../data/api';
-import { API_BASE_URL, Routes } from '../../../data/constants';
-import { fetchCourseBlocks } from '../../../data/thunks';
-import { initializeStore } from '../../../store';
-import { executeThunk } from '../../../test-utils';
-import { DiscussionContext } from '../../common/context';
-import { fetchCourseTopics } from '../../topics/data/thunks';
-import { BreadcrumbMenu } from '../index';
-
-import '../../topics/data/__factories__';
-
-const courseId = 'course-v1:edX+DemoX+Demo_Course';
-const topicsApiUrl = `${API_BASE_URL}/api/discussion/v2/course_topics/${courseId}`;
-let store;
-let axiosMock;
-
-function renderComponent(path, topicId = null, category = null) {
-  render(
-    <IntlProvider locale="en">
-      <AppProvider store={store}>
-        <DiscussionContext.Provider
-          value={{
-            courseId,
-            topicId,
-            category,
-          }}
-        >
-          <MemoryRouter initialEntries={[path]}>
-            <Route
-              path={[
-                Routes.POSTS.PATH,
-                Routes.TOPICS.CATEGORY,
-              ]}
-              component={BreadcrumbMenu}
-            />
-          </MemoryRouter>
-        </DiscussionContext.Provider>
-      </AppProvider>
-    </IntlProvider>,
-  );
-}
-
-describe('BreadcrumbMenu', () => {
-  let blocksAPIResponse;
-  beforeEach(async () => {
-    initializeMockApp({
-      authenticatedUser: {
-        userId: 3,
-        username: 'abc123',
-        administrator: true,
-        roles: [],
-      },
-    });
-
-    store = initializeStore({
-      config: {
-        provider: 'openedx',
-      },
-      blocks: {
-        topics: {},
-      },
-    });
-    Factory.resetAll();
-    axiosMock = new MockAdapter(getAuthenticatedHttpClient());
-    blocksAPIResponse = getBlocksAPIResponse();
-    axiosMock.onGet(blocksAPIURL)
-      .reply(200, blocksAPIResponse);
-    await executeThunk(fetchCourseBlocks(courseId, 'test-user'), store.dispatch, store.getState);
-    const data = [
-      ...Factory.buildList('topic.v2', 3, { usage_key: null }, { topicPrefix: 'ncw' }),
-      Factory.build('topic.v2', { id: 'vertical_0270f6de40fc' }),
-      Factory.build('topic.v2', { id: '867dddb6f55d410caaa9c1eb9c6743ec' }),
-      Factory.build('topic.v2', { id: '4f6c1b4e316a419ab5b6bf30e6c708e9' }),
-    ];
-    axiosMock
-      .onGet(topicsApiUrl)
-      .reply(200, data);
-    await executeThunk(fetchCourseTopics(courseId), store.dispatch, store.getState);
-  });
-
-  it('shows the category dropdown with a category selected', async () => {
-    const chapterKey = 'block-v1:edX+DemoX+Demo_Course+type@chapter+block@d8a6192ade314473a78242dfeedfbf5b';
-    const sectionKey = 'block-v1:edX+DemoX+Demo_Course+type@sequential+block@edx_introduction';
-
-    renderComponent(`/${courseId}/category/${chapterKey}`, null, chapterKey);
-
-    await waitFor(() => screen.findByText(blocksAPIResponse.blocks[chapterKey].display_name));
-
-    const chapterDropdown = screen.queryByText(blocksAPIResponse.blocks[chapterKey].display_name);
-    // Since a category is selected a subcategory dropdown should also be visible with "show all" selected by default
-    const sectionDropdown = screen.queryByRole('button', { name: 'Show all' });
-    // A show all button should show up that lists topics in the current category
-    expect(sectionDropdown)
-      .toBeInTheDocument();
-    // Other categories should not be visible.
-    expect(screen.queryByText(blocksAPIResponse.blocks[sectionKey].display_name))
-      .not
-      .toBeInTheDocument();
-
-    // Click on the category dropdown.
-    act(() => {
-      fireEvent.click(chapterDropdown);
-    });
-    // Now other categories should be visible in the dropdown.
-    expect(screen.queryByText(blocksAPIResponse.blocks[chapterKey].display_name))
-      .toBeInTheDocument();
-    // There are 4 categories but this has a length of 5 since there is also a link to show all.
-    expect(screen.queryAllByRole('link', { exact: false }))
-      .toHaveLength(5);
-
-    // Now click on the topics dropdown
-    act(() => {
-      fireEvent.click(sectionDropdown);
-    });
-
-    // Topics in the category should be visible.
-    expect(screen.queryByRole('link', { name: 'Demo Course Overview' }))
-      .toBeInTheDocument();
-  });
-
-  it('shows the category correct dropdown labels with a topic selected', async () => {
-    const topicId = 'vertical_0270f6de40fc';
-    renderComponent(`/${courseId}/topics/${topicId}`, topicId);
-    // Since a topic is selected, we have both a category and topic, so "show all shouldn't be visible"
-    expect(screen.queryByText('Show all'))
-      .not
-      .toBeInTheDocument();
-    // The name of the category and topic should be visible.
-    expect(await screen.findByRole('button', { name: 'Introduction' }))
-      .toBeInTheDocument();
-    expect(await screen.findByRole('button', { name: 'Demo Course Overview' }))
-      .toBeInTheDocument();
-    expect(await screen.findByRole('button', { name: 'Introduction: Video and Sequences' }))
-      .toBeInTheDocument();
-  });
-});

src/discussions/navigation/breadcrumb-menu/LegacyBreadcrumbMenu.test.jsx

@@ -12,7 +12,7 @@ import { initializeMockApp } from '@edx/frontend-platform';
 import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
 import { AppProvider } from '@edx/frontend-platform/react';
 
-import { API_BASE_URL, Routes } from '../../../data/constants';
+import { getApiBaseUrl, Routes } from '../../../data/constants';
 import { initializeStore } from '../../../store';
 import { executeThunk } from '../../../test-utils';
 import { fetchCourseTopics } from '../../topics/data/thunks';
@@ -21,7 +21,7 @@ import { LegacyBreadcrumbMenu } from '../index';
 import '../../topics/data/__factories__';
 
 const courseId = 'course-v1:edX+TestX+Test_Course';
-const topicsApiUrl = `${API_BASE_URL}/api/discussion/v1/course_topics/${courseId}`;
+const topicsApiUrl = `${getApiBaseUrl()}/api/discussion/v1/course_topics/${courseId}`;
 let store;
 let axiosMock;
 

src/discussions/navigation/index.js

@@ -1,4 +1,3 @@
 /* eslint-disable import/prefer-default-export */
-export { default as BreadcrumbMenu } from './breadcrumb-menu/BreadcrumbMenu';
 export { default as LegacyBreadcrumbMenu } from './breadcrumb-menu/LegacyBreadcrumbMenu';
 export { default as NavigationBar } from './navigation-bar/NavigationBar';

src/discussions/posts/NoResults.jsx

@@ -4,21 +4,24 @@ import { useSelector } from 'react-redux';
 import { injectIntl, intlShape } from '@edx/frontend-platform/i18n';
 
 import { selectAreThreadsFiltered } from '../data/selectors';
+import { selectTopicFilter } from '../in-context-topics/data/selectors';
 import messages from '../messages';
 
 function NoResults({ intl }) {
   const postsFiltered = useSelector(selectAreThreadsFiltered);
+  const inContextTopicsFilter = useSelector(selectTopicFilter);
   const topicsFilter = useSelector(({ topics }) => topics.filter);
   const filters = useSelector((state) => state.threads.filters);
   const learnersFilter = useSelector(({ learners }) => learners.usernameSearch);
-  const isFiltered = postsFiltered || (topicsFilter !== '') || (learnersFilter !== null);
+  const isFiltered = postsFiltered || (topicsFilter !== '')
+    || (learnersFilter !== null) || (inContextTopicsFilter !== '');
 
   let helpMessage = messages.removeFilters;
   if (!isFiltered) {
     return null;
   } if (filters.search || learnersFilter) {
     helpMessage = messages.removeKeywords;
-  } if (topicsFilter) {
+  } if (topicsFilter || inContextTopicsFilter) {
     helpMessage = messages.removeKeywordsOnly;
   }
   const titleCssClasses = classNames(

src/discussions/posts/PostsList.jsx

@@ -22,7 +22,9 @@ import { fetchThreads } from './data/thunks';
 import NoResults from './NoResults';
 import { PostLink } from './post';
 
-function PostsList({ posts, topics, intl }) {
+function PostsList({
+  posts, topics, intl, isTopicTab,
+}) {
   const dispatch = useDispatch();
   const {
     courseId,
@@ -38,7 +40,7 @@ function PostsList({ posts, topics, intl }) {
   const userIsStaff = useSelector(selectUserIsStaff);
   const configStatus = useSelector(selectconfigLoadingStatus);
 
-  const loadThreads = (topicIds, pageNum = undefined) => {
+  const loadThreads = (topicIds, pageNum = undefined, isFilterChanged = false) => {
     const params = {
       orderBy,
       filters,
@@ -46,6 +48,7 @@ function PostsList({ posts, topics, intl }) {
       author: showOwnPosts ? authenticatedUser.username : null,
       countFlagged: (userHasModerationPrivileges || userIsStaff) || undefined,
       topicIds,
+      isFilterChanged,
     };
 
     if (showOwnPosts) {
@@ -59,7 +62,11 @@ function PostsList({ posts, topics, intl }) {
     if (topics !== undefined && configStatus === RequestStatus.SUCCESSFUL) {
       loadThreads(topics);
     }
-  }, [courseId, orderBy, filters, page, JSON.stringify(topics), configStatus]);
+  }, [courseId, filters, orderBy, page, JSON.stringify(topics), configStatus]);
+
+  useEffect(() => {
+    if (isTopicTab) { loadThreads(topics, 1, true); }
+  }, [filters]);
 
   const checkIsSelected = (id) => window.location.pathname.includes(id);
   const pinnedPosts = useMemo(() => filterPosts(posts, 'pinned'), [posts]);
@@ -83,7 +90,7 @@ function PostsList({ posts, topics, intl }) {
       {postInstances(unpinnedPosts)}
       {posts?.length === 0 && loadingStatus === RequestStatus.SUCCESSFUL && <NoResults />}
       {loadingStatus === RequestStatus.IN_PROGRESS ? (
-        <div className="d-flex justify-content-center p-4">
+        <div className="d-flex justify-content-center p-4 mx-auto my-auto">
           <Spinner animation="border" variant="primary" size="lg" />
         </div>
       ) : (
@@ -103,12 +110,14 @@ PostsList.propTypes = {
     id: PropTypes.string.isRequired,
   })),
   topics: PropTypes.arrayOf(PropTypes.string),
+  isTopicTab: PropTypes.bool,
   intl: intlShape.isRequired,
 };
 
 PostsList.defaultProps = {
   posts: [],
   topics: undefined,
+  isTopicTab: false,
 };
 
 export default injectIntl(PostsList);

src/discussions/posts/PostsView.jsx

@@ -1,11 +1,18 @@
-import React, { useContext } from 'react';
+import React, { useContext, useEffect } from 'react';
 import PropTypes from 'prop-types';
 
+import isEmpty from 'lodash/isEmpty';
 import { useDispatch, useSelector } from 'react-redux';
 
 import SearchInfo from '../../components/SearchInfo';
 import { selectCurrentCategoryGrouping, selectTopicsUnderCategory } from '../../data/selectors';
 import { DiscussionContext } from '../common/context';
+import { selectEnableInContext } from '../data/selectors';
+import { selectTopics as selectInContextTopics } from '../in-context-topics/data/selectors';
+import { fetchCourseTopicsV3 } from '../in-context-topics/data/thunks';
+import { selectTopics } from '../topics/data/selectors';
+import { fetchCourseTopics } from '../topics/data/thunks';
+import { handleKeyDown } from '../utils';
 import {
   selectAllThreads,
   selectTopicThreads,
@@ -21,7 +28,7 @@ function AllPostsList() {
 
 function TopicPostsList({ topicId }) {
   const posts = useSelector(selectTopicThreads([topicId]));
-  return <PostsList posts={posts} topics={[topicId]} />;
+  return <PostsList posts={posts} topics={[topicId]} isTopicTab />;
 }
 
 TopicPostsList.propTypes = {
@@ -29,10 +36,10 @@ TopicPostsList.propTypes = {
 };
 
 function CategoryPostsList({ category }) {
-  const { inContext } = useContext(DiscussionContext);
+  const { enableInContextSidebar } = useContext(DiscussionContext);
   const groupedCategory = useSelector(selectCurrentCategoryGrouping)(category);
   // If grouping at subsection is enabled, only apply it when browsing discussions in context in the learning MFE.
-  const topicIds = useSelector(selectTopicsUnderCategory)(inContext ? groupedCategory : category);
+  const topicIds = useSelector(selectTopicsUnderCategory)(enableInContextSidebar ? groupedCategory : category);
   const posts = useSelector(selectTopicThreads(topicIds));
   return <PostsList posts={posts} topics={topicIds} />;
 }
@@ -45,12 +52,24 @@ function PostsView() {
   const {
     topicId,
     category,
+    courseId,
+    enableInContextSidebar,
   } = useContext(DiscussionContext);
   const dispatch = useDispatch();
+  const enableInContext = useSelector(selectEnableInContext);
   const searchString = useSelector(({ threads }) => threads.filters.search);
   const resultsFound = useSelector(({ threads }) => threads.totalThreads);
   const textSearchRewrite = useSelector(({ threads }) => threads.textSearchRewrite);
   const loadingStatus = useSelector(({ threads }) => threads.status);
+  const topics = useSelector(enableInContext ? selectInContextTopics : selectTopics);
+
+  useEffect(() => {
+    if (isEmpty(topics)) {
+      dispatch((enableInContext || enableInContextSidebar)
+        ? fetchCourseTopicsV3(courseId)
+        : fetchCourseTopics(courseId));
+    }
+  }, [topics]);
 
   let postsListComponent;
 
@@ -62,20 +81,6 @@ function PostsView() {
     postsListComponent = <AllPostsList />;
   }
 
-  const handleKeyDown = (event) => {
-    const { key } = event;
-    if (key !== 'ArrowDown' && key !== 'ArrowUp') { return; }
-    const option = event.target;
-
-    let selectedOption;
-    if (key === 'ArrowDown') { selectedOption = option.nextElementSibling; }
-    if (key === 'ArrowUp') { selectedOption = option.previousElementSibling; }
-
-    if (selectedOption) {
-      selectedOption.focus();
-    }
-  };
-
   return (
     <div className="discussion-posts d-flex flex-column h-100">
       {searchString && (

src/discussions/posts/PostsView.test.jsx

@@ -13,25 +13,31 @@ import { initializeMockApp } from '@edx/frontend-platform';
 import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
 import { AppProvider } from '@edx/frontend-platform/react';
 
-import { Routes, ThreadType } from '../../data/constants';
+import { getApiBaseUrl, Routes, ThreadType } from '../../data/constants';
 import { initializeStore } from '../../store';
+import { executeThunk } from '../../test-utils';
 import { getCohortsApiUrl } from '../cohorts/data/api';
 import { DiscussionContext } from '../common/context';
 import { fetchConfigSuccess } from '../data/slices';
-import { coursesApiUrl } from '../learners/data/api';
-import { threadsApiUrl } from './data/api';
+import { getCoursesApiUrl } from '../learners/data/api';
+import { fetchCourseTopics } from '../topics/data/thunks';
+import { getThreadsApiUrl } from './data/api';
 import { PostsView } from './index';
 
 import './data/__factories__';
 import '../cohorts/data/__factories__';
+import '../topics/data/__factories__';
 
 const courseId = 'course-v1:edX+TestX+Test_Course';
+const coursesApiUrl = getCoursesApiUrl();
+const threadsApiUrl = getThreadsApiUrl();
+const topicsApiUrl = `${getApiBaseUrl()}/api/discussion/v1/course_topics/${courseId}`;
 let store;
 let axiosMock;
 const username = 'abc123';
 
 async function renderComponent({
-  postId, topicId, category, myPosts, inContext = false,
+  postId, topicId, category, myPosts, enableInContextSidebar = false,
 } = { myPosts: false }) {
   let path = generatePath(Routes.POSTS.ALL_POSTS, { courseId });
   let page;
@@ -58,7 +64,7 @@ async function renderComponent({
             topicId,
             category,
             page,
-            inContext,
+            enableInContextSidebar,
           }}
           >
             <Switch>
@@ -104,6 +110,12 @@ describe('PostsView', () => {
           pageSize: 6,
         })];
       });
+    axiosMock
+      .onGet(topicsApiUrl)
+      .reply(200, {
+        courseware_topics: Factory.buildList('category', 2),
+        non_courseware_topics: Factory.buildList('topic', 3, {}, { topicPrefix: 'ncw' }),
+      });
   });
 
   function setupStore(data = {}) {
@@ -112,7 +124,6 @@ describe('PostsView', () => {
       config: { hasModerationPrivileges: true },
       ...data,
     };
-    // console.log(storeData);
     store = initializeStore(storeData);
     store.dispatch(fetchConfigSuccess({}));
   }
@@ -171,7 +182,7 @@ describe('PostsView', () => {
           config: { groupAtSubsection: grouping, hasModerationPrivileges: true, provider: 'openedx' },
         });
         await act(async () => {
-          await renderComponent({ category: 'test-usage-key', inContext: true, p: true });
+          await renderComponent({ category: 'test-usage-key', enableInContextSidebar: true, p: true });
         });
         const topicThreadCount = Math.ceil(threadCount / 3);
         expect(screen.queryAllByText(/this is thread-\d+ in topic some-topic-2/i))
@@ -195,6 +206,8 @@ describe('PostsView', () => {
 
     beforeEach(async () => {
       setupStore();
+      await executeThunk(fetchCourseTopics(courseId), store.dispatch, store.getState);
+
       await act(async () => {
         await renderComponent();
       });

src/discussions/posts/data/api.js

@@ -8,10 +8,8 @@ ensureConfig([
   'LMS_BASE_URL',
 ], 'Posts API service');
 
-const apiBaseUrl = getConfig().LMS_BASE_URL;
-
-export const threadsApiUrl = `${apiBaseUrl}/api/discussion/v1/threads/`;
-export const coursesApiUrl = `${apiBaseUrl}/api/discussion/v1/courses/`;
+export const getThreadsApiUrl = () => `${getConfig().LMS_BASE_URL}/api/discussion/v1/threads/`;
+export const getCoursesApiUrl = () => `${getConfig().LMS_BASE_URL}/api/discussion/v1/courses/`;
 
 /**
  * Fetches all the threads in the given course and topic.
@@ -62,7 +60,7 @@ export async function getThreads(
     countFlagged,
     groupId: cohort,
   });
-  const { data } = await getAuthenticatedHttpClient().get(threadsApiUrl, { params });
+  const { data } = await getAuthenticatedHttpClient().get(getThreadsApiUrl(), { params });
   return data;
 }
 
@@ -71,9 +69,9 @@ export async function getThreads(
  * @param {string} threadId
  * @returns {Promise<{}>}
  */
-export async function getThread(threadId) {
-  const params = { requested_fields: 'profile_image' };
-  const url = `${threadsApiUrl}${threadId}/`;
+export async function getThread(threadId, courseId) {
+  const params = { requested_fields: 'profile_image', course_id: courseId };
+  const url = `${getThreadsApiUrl()}${threadId}/`;
   const { data } = await getAuthenticatedHttpClient().get(url, { params });
   return data;
 }
@@ -117,7 +115,7 @@ export async function postThread(
   });
 
   const { data } = await getAuthenticatedHttpClient()
-    .post(threadsApiUrl, postData);
+    .post(getThreadsApiUrl(), postData);
   return data;
 }
 
@@ -152,7 +150,7 @@ export async function updateThread(threadId, {
   editReasonCode,
   closeReasonCode,
 } = {}) {
-  const url = `${threadsApiUrl}${threadId}/`;
+  const url = `${getThreadsApiUrl()}${threadId}/`;
   const patchData = snakeCaseObject({
     topicId,
     abuse_flagged: flagged,
@@ -177,7 +175,7 @@ export async function updateThread(threadId, {
  * @param {string} threadId
  */
 export async function deleteThread(threadId) {
-  const url = `${threadsApiUrl}${threadId}/`;
+  const url = `${getThreadsApiUrl()}${threadId}/`;
   await getAuthenticatedHttpClient()
     .delete(url);
 }
@@ -191,7 +189,7 @@ export async function deleteThread(threadId) {
  * @returns {Promise<{ location: string }>}
  */
 export async function uploadFile(blob, filename, courseId, threadKey) {
-  const uploadUrl = `${coursesApiUrl}${courseId}/upload`;
+  const uploadUrl = `${getCoursesApiUrl()}${courseId}/upload`;
   const formData = new FormData();
   formData.append('thread_key', threadKey);
   formData.append('uploaded_file', blob, filename);

src/discussions/posts/data/api.test.js

@@ -3,9 +3,10 @@ import MockAdapter from 'axios-mock-adapter';
 import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
 import { initializeMockApp } from '@edx/frontend-platform/testing';
 
-import { coursesApiUrl, uploadFile } from './api';
+import { getCoursesApiUrl, uploadFile } from './api';
 
 const courseId = 'course-v1:edX+TestX+Test_Course';
+const coursesApiUrl = getCoursesApiUrl();
 
 let axiosMock = null;
 

src/discussions/posts/data/redux.test.js

@@ -6,7 +6,7 @@ import { initializeMockApp } from '@edx/frontend-platform/testing';
 
 import { initializeStore } from '../../../store';
 import { executeThunk } from '../../../test-utils';
-import { threadsApiUrl } from './api';
+import { getThreadsApiUrl } from './api';
 import {
   createNewThread, fetchThread, fetchThreads, removeThread, updateExistingThread,
 } from './thunks';
@@ -14,6 +14,7 @@ import {
 import './__factories__';
 
 const courseId = 'course-v1:edX+TestX+Test_Course';
+const threadsApiUrl = getThreadsApiUrl();
 
 let axiosMock;
 let store;

src/discussions/posts/data/selectors.js

@@ -6,6 +6,8 @@ const selectThreads = state => state.threads.threadsById;
 
 const mapIdsToThreads = (ids, threads) => ids.map(id => threads?.[id]);
 
+export const selectPostEditorVisible = state => state.threads.postEditorVisible;
+
 export const selectTopicThreads = topicIds => createSelector(
   [
     state => (topicIds || []).flatMap(topicId => state.threads.threadsInTopic[topicId] || []),

src/discussions/posts/data/slices.js

@@ -1,5 +1,6 @@
 /* eslint-disable no-param-reassign,import/prefer-default-export */
 import { createSlice } from '@reduxjs/toolkit';
+import omitBy from 'lodash/omitBy';
 
 import {
   PostsStatusFilter, RequestStatus, ThreadOrdering, ThreadType,
@@ -57,7 +58,6 @@ const threadsSlice = createSlice({
       if (state.author !== payload.author) {
         state.pages = [];
         state.author = payload.author;
-        state.totalThreads = null;
       }
       state.status = RequestStatus.IN_PROGRESS;
     },
@@ -79,7 +79,13 @@ const threadsSlice = createSlice({
       }
       state.status = RequestStatus.SUCCESSFUL;
       state.threadsById = { ...state.threadsById, ...payload.threadsById };
-      state.threadsInTopic = mergeThreadsInTopics(state.threadsInTopic, payload.threadsInTopic);
+      // filter
+      if (payload.isFilterChanged) {
+        state.threadsInTopic = { ...payload.threadsInTopic };
+      } else {
+        state.threadsInTopic = mergeThreadsInTopics(state.threadsInTopic, payload.threadsInTopic);
+      }
+
       state.avatars = { ...state.avatars, ...payload.avatars };
       state.nextPage = (payload.page < payload.pagination.numPages) ? payload.page + 1 : null;
       state.totalPages = payload.pagination.numPages;
@@ -155,9 +161,11 @@ const threadsSlice = createSlice({
     },
     updateThreadFailed: (state) => {
       state.postStatus = RequestStatus.FAILED;
+      state.totalThreads = 0;
     },
     updateThreadDenied: (state) => {
       state.postStatus = RequestStatus.DENIED;
+      state.totalThreads = 0;
     },
     deleteThreadRequest: (state) => {
       state.postStatus = RequestStatus.IN_PROGRESS;
@@ -168,7 +176,7 @@ const threadsSlice = createSlice({
       state.postStatus = RequestStatus.SUCCESSFUL;
       state.threadsInTopic[topicId] = state.threadsInTopic[topicId].filter(item => item !== threadId);
       state.pages = state.pages.map(page => page?.filter(item => item !== threadId));
-      delete state.threadsById[threadId];
+      state.threadsById = omitBy(state.threadsById, (thread) => thread.id === threadId);
     },
     deleteThreadFailed: (state) => {
       state.postStatus = RequestStatus.FAILED;
@@ -210,6 +218,19 @@ const threadsSlice = createSlice({
     clearRedirect: (state) => {
       state.redirectToThread = null;
     },
+    clearFilter: (state) => {
+      state.filters = {
+        status: PostsStatusFilter.ALL,
+        postType: ThreadType.ALL,
+        cohort: '',
+        search: '',
+      };
+      state.pages = [];
+    },
+    clearSort: (state) => {
+      state.sortedBy = ThreadOrdering.BY_LAST_ACTIVITY;
+      state.pages = [];
+    },
   },
 });
 
@@ -246,6 +267,8 @@ export const {
   hidePostEditor,
   clearRedirect,
   clearPostsPages,
+  clearFilter,
+  clearSort,
 } = threadsSlice.actions;
 
 export const threadsReducer = threadsSlice.reducer;

src/discussions/posts/data/thunks.js

@@ -102,6 +102,7 @@ export function fetchThreads(courseId, {
   author = null,
   filters = {},
   page = 1,
+  isFilterChanged,
   countFlagged,
 } = {}) {
   const options = {
@@ -141,7 +142,7 @@ export function fetchThreads(courseId, {
       const data = await getThreads(courseId, options);
       const normalisedData = normaliseThreads(camelCaseObject(data), topicIds);
       dispatch(fetchThreadsSuccess({
-        ...normalisedData, page, author, textSearchRewrite: data.text_search_rewrite,
+        ...normalisedData, page, author, textSearchRewrite: data.text_search_rewrite, isFilterChanged,
       }));
     } catch (error) {
       if (getHttpErrorStatus(error) === 403) {
@@ -154,18 +155,18 @@ export function fetchThreads(courseId, {
   };
 }
 
-export function fetchThread(threadId, isDirectLinkPost = false) {
+export function fetchThread(threadId, courseId, isDirectLinkPost = false) {
   return async (dispatch) => {
     try {
       dispatch(fetchThreadRequest({ threadId }));
-      const data = await getThread(threadId);
+      const data = await getThread(threadId, courseId);
       if (isDirectLinkPost) {
         dispatch(fetchThreadByDirectLinkSuccess({ ...normaliseThreads(camelCaseObject(data)), page: 1 }));
       } else {
         dispatch(fetchThreadSuccess(normaliseThreads(camelCaseObject(data))));
       }
     } catch (error) {
-      if (getHttpErrorStatus(error) === 403) {
+      if (getHttpErrorStatus(error) === 403 || getHttpErrorStatus(error) === 404) {
         dispatch(fetchThreadDenied());
       } else {
         dispatch(fetchThreadFailed());

src/discussions/posts/post-actions-bar/PostActionsBar.jsx

@@ -1,5 +1,4 @@
-import React from 'react';
-import PropTypes from 'prop-types';
+import React, { useContext } from 'react';
 
 import classNames from 'classnames';
 import { useDispatch, useSelector } from 'react-redux';
@@ -12,8 +11,11 @@ import { Close } from '@edx/paragon/icons';
 
 import Search from '../../../components/Search';
 import { RequestStatus } from '../../../data/constants';
-import { selectBlackoutDate, selectconfigLoadingStatus } from '../../data/selectors';
-import { inBlackoutDateRange, postMessageToParent } from '../../utils';
+import { DiscussionContext } from '../../common/context';
+import { useUserCanAddThreadInBlackoutDate } from '../../data/hooks';
+import { selectconfigLoadingStatus, selectEnableInContext } from '../../data/selectors';
+import { TopicSearchBar as IncontextSearch } from '../../in-context-topics/topic-search';
+import { postMessageToParent } from '../../utils';
 import { showPostEditor } from '../data';
 import messages from './messages';
 
@@ -21,38 +23,44 @@ import './actionBar.scss';
 
 function PostActionsBar({
   intl,
-  inContext,
 }) {
   const dispatch = useDispatch();
   const loadingStatus = useSelector(selectconfigLoadingStatus);
-  const blackoutDateRange = useSelector(selectBlackoutDate);
+  const enableInContext = useSelector(selectEnableInContext);
+  const userCanAddThreadInBlackoutDate = useUserCanAddThreadInBlackoutDate();
+  const { enableInContextSidebar, page } = useContext(DiscussionContext);
 
   const handleCloseInContext = () => {
     postMessageToParent('learning.events.sidebar.close');
   };
 
   return (
-    <div className={classNames('d-flex justify-content-end flex-grow-1', { 'py-1': !inContext })}>
-      {!inContext && <Search />}
-      {inContext && (
+    <div className={classNames('d-flex justify-content-end flex-grow-1', { 'py-1': !enableInContextSidebar })}>
+      {!enableInContextSidebar && (
+        (enableInContext && ['topics', 'category'].includes(page))
+          ? <IncontextSearch />
+          : <Search />
+      )}
+      {enableInContextSidebar && (
         <h4 className="d-flex flex-grow-1 font-weight-bold my-0 py-0 align-self-center">
           {intl.formatMessage(messages.title)}
         </h4>
       )}
-      {(!inBlackoutDateRange(blackoutDateRange) && loadingStatus === RequestStatus.SUCCESSFUL) && (
+      {loadingStatus === RequestStatus.SUCCESSFUL && userCanAddThreadInBlackoutDate
+      && (
         <>
-          {!inContext && <div className="border-right border-light-400 mx-3" />}
+          {!enableInContextSidebar && <div className="border-right border-light-400 mx-3" />}
           <Button
-            variant={inContext ? 'plain' : 'brand'}
-            className={classNames('my-0', { 'p-0': inContext })}
+            variant={enableInContextSidebar ? 'plain' : 'brand'}
+            className={classNames('my-0', { 'p-0': enableInContextSidebar })}
             onClick={() => dispatch(showPostEditor())}
-            size={inContext ? 'md' : 'sm'}
+            size={enableInContextSidebar ? 'md' : 'sm'}
           >
             {intl.formatMessage(messages.addAPost)}
           </Button>
         </>
       )}
-      {inContext && (
+      {enableInContextSidebar && (
         <>
           <div className="border-right border-light-300 mr-2 ml-3.5 my-2" />
           <IconButton
@@ -69,7 +77,6 @@ function PostActionsBar({
 
 PostActionsBar.propTypes = {
   intl: intlShape.isRequired,
-  inContext: PropTypes.bool.isRequired,
 };
 
 export default injectIntl(PostActionsBar);

src/discussions/posts/post-editor/PostEditor.jsx

@@ -28,11 +28,19 @@ import { useCurrentDiscussionTopic } from '../../data/hooks';
 import {
   selectAnonymousPostingConfig,
   selectDivisionSettings,
+  selectEnableInContext,
   selectModerationSettings,
   selectUserHasModerationPrivileges,
   selectUserIsGroupTa,
   selectUserIsStaff,
 } from '../../data/selectors';
+import { EmptyPage } from '../../empty-posts';
+import {
+  selectArchivedTopics,
+  selectCoursewareTopics as inContextCourseware,
+  selectNonCoursewareIds as inContextCoursewareIds,
+  selectNonCoursewareTopics as inContextNonCourseware,
+} from '../../in-context-topics/data/selectors';
 import { selectCoursewareTopics, selectNonCoursewareIds, selectNonCoursewareTopics } from '../../topics/data/selectors';
 import {
   discussionsPath, formikCompatibleHandler, isFormikFieldInvalid, useCommentsPagePath,
@@ -51,7 +59,7 @@ function DiscussionPostType({
 }) {
   // Need to use regular label since Form.Label doesn't support overriding htmlFor
   return (
-    <label htmlFor={`post-type-${value}`} className="d-flex p-0 my-2 mr-3">
+    <label htmlFor={`post-type-${value}`} className="d-flex p-0 my-0 mr-3">
       <Form.Radio value={value} id={`post-type-${value}`} className="sr-only">{type}</Form.Radio>
       <Card
         className={classNames('border-2 shadow-none', {
@@ -93,10 +101,12 @@ function PostEditor({
     courseId,
     postId,
   } = useParams();
+  const { category, enableInContextSidebar } = useContext(DiscussionContext);
   const topicId = useCurrentDiscussionTopic();
-  const nonCoursewareTopics = useSelector(selectNonCoursewareTopics);
-  const nonCoursewareIds = useSelector(selectNonCoursewareIds);
-  const coursewareTopics = useSelector(selectCoursewareTopics);
+  const enableInContext = useSelector(selectEnableInContext);
+  const nonCoursewareTopics = useSelector(enableInContext ? inContextNonCourseware : selectNonCoursewareTopics);
+  const nonCoursewareIds = useSelector(enableInContext ? inContextCoursewareIds : selectNonCoursewareIds);
+  const coursewareTopics = useSelector(enableInContext ? inContextCourseware : selectCoursewareTopics);
   const cohorts = useSelector(selectCourseCohorts);
   const post = useSelector(selectThread(postId));
   const userHasModerationPrivileges = useSelector(selectUserHasModerationPrivileges);
@@ -105,7 +115,7 @@ function PostEditor({
   const { allowAnonymous, allowAnonymousToPeers } = useSelector(selectAnonymousPostingConfig);
   const { reasonCodesEnabled, editReasons } = useSelector(selectModerationSettings);
   const userIsStaff = useSelector(selectUserIsStaff);
-  const { category, inContext } = useContext(DiscussionContext);
+  const archivedTopics = useSelector(selectArchivedTopics);
 
   const canDisplayEditReason = (reasonCodesEnabled && editExisting
     && (userHasModerationPrivileges || userIsGroupTa || userIsStaff)
@@ -137,7 +147,7 @@ function PostEditor({
     follow: isEmpty(post?.following) ? true : post?.following,
     anonymous: allowAnonymous ? false : undefined,
     anonymousToPeers: allowAnonymousToPeers ? false : undefined,
-    editReasonCode: post?.lastEdit?.reasonCode || (userIsStaff ? 'violates-guidelines' : ''),
+    editReasonCode: post?.lastEdit?.reasonCode || (userIsStaff && canDisplayEditReason ? 'violates-guidelines' : undefined),
     cohort: post?.cohort || 'default',
   };
 
@@ -193,16 +203,25 @@ function PostEditor({
       dispatch(fetchCourseCohorts(courseId));
     }
     if (editExisting) {
-      dispatch(fetchThread(postId));
+      dispatchSubmit(fetchThread(postId, courseId));
     }
   }, [courseId, editExisting]);
 
   if (editExisting && !post) {
-    return (
-      <div className="m-4 card p-4 align-items-center">
-        <Spinner animation="border" variant="primary" />
-      </div>
-    );
+    if (submitting) {
+      return (
+        <div className="m-4 card p-4 align-items-center">
+          <Spinner animation="border" variant="primary" />
+        </div>
+      );
+    }
+    if (!submitting) {
+      return (
+        <EmptyPage
+          title={intl.formatMessage(messages.noThreadFound)}
+        />
+      );
+    }
   }
 
   const validationSchema = Yup.object().shape({
@@ -230,6 +249,10 @@ function PostEditor({
 
   const postEditorId = `post-editor-${editExisting ? postId : 'new'}`;
 
+  const handleInContextSelectLabel = (section, subsection) => (
+    `${section.displayName} / ${subsection.displayName}` || intl.formatMessage(messages.unnamedTopics)
+  );
+
   return (
     <Formik
       enableReinitialize
@@ -247,11 +270,11 @@ function PostEditor({
         resetForm,
       }) => (
         <Form className="m-4 card p-4 post-form" onSubmit={handleSubmit}>
-          <h3 className="mb-3">
+          <h4 className="mb-4" style={{ lineHeight: '16px' }}>
             {editExisting
               ? intl.formatMessage(messages.editPostHeading)
               : intl.formatMessage(messages.addPostHeading)}
-          </h3>
+          </h4>
           <Form.RadioSet
             name="postType"
             className="d-flex flex-row flex-wrap"
@@ -265,14 +288,12 @@ function PostEditor({
               selected={values.postType === 'discussion'}
               type={intl.formatMessage(messages.discussionType)}
               icon={<Post />}
-              description={intl.formatMessage(messages.discussionDescription)}
             />
             <DiscussionPostType
               value="question"
               selected={values.postType === 'question'}
               type={intl.formatMessage(messages.questionType)}
               icon={<Help />}
-              description={intl.formatMessage(messages.questionDescription)}
             />
           </Form.RadioSet>
           <div className="d-flex flex-row my-4.5 justify-content-between">
@@ -286,7 +307,7 @@ function PostEditor({
                 onBlur={handleBlur}
                 aria-describedby="topicAreaInput"
                 floatingLabel={intl.formatMessage(messages.topicArea)}
-                disabled={inContext}
+                disabled={enableInContextSidebar}
               >
                 {nonCoursewareTopics.map(topic => (
                   <option
@@ -295,15 +316,46 @@ function PostEditor({
                   >{topic.name || intl.formatMessage(messages.unnamedSubTopics)}
                   </option>
                 ))}
-                {coursewareTopics.map(categoryObj => (
-                  <optgroup label={categoryObj.name || intl.formatMessage(messages.unnamedTopics)} key={categoryObj.id}>
-                    {categoryObj.topics.map(subtopic => (
-                      <option key={subtopic.id} value={subtopic.id}>
-                        {subtopic.name || intl.formatMessage(messages.unnamedSubTopics)}
-                      </option>
+                {enableInContext ? (
+                  <>
+                    {coursewareTopics?.map(section => (
+                      section?.children?.map(subsection => (
+                        <optgroup
+                          label={handleInContextSelectLabel(section, subsection)}
+                          key={subsection.id}
+                        >
+                          {subsection?.children?.map(unit => (
+                            <option key={unit.id} value={unit.id}>
+                              {unit.name || intl.formatMessage(messages.unnamedSubTopics)}
+                            </option>
+                          ))}
+                        </optgroup>
+                      ))
                     ))}
-                  </optgroup>
-                ))}
+                    {(userIsStaff || userIsGroupTa || userHasModerationPrivileges) && (
+                      <optgroup label={intl.formatMessage(messages.archivedTopics)}>
+                        {archivedTopics.map(topic => (
+                          <option key={topic.id} value={topic.id}>
+                            {topic.name || intl.formatMessage(messages.unnamedSubTopics)}
+                          </option>
+                        ))}
+                      </optgroup>
+                    )}
+                  </>
+                ) : (
+                  coursewareTopics.map(categoryObj => (
+                    <optgroup
+                      label={categoryObj.name || intl.formatMessage(messages.unnamedTopics)}
+                      key={categoryObj.id}
+                    >
+                      {categoryObj.topics.map(subtopic => (
+                        <option key={subtopic.id} value={subtopic.id}>
+                          {subtopic.name || intl.formatMessage(messages.unnamedSubTopics)}
+                        </option>
+                      ))}
+                    </optgroup>
+                  ))
+                )}
               </Form.Control>
             </Form.Group>
             {canSelectCohort(values.topic) && (
@@ -326,8 +378,8 @@ function PostEditor({
               </Form.Group>
             )}
           </div>
-          <div className="border-bottom border-light-400" />
-          <div className="d-flex flex-row my-4.5 justify-content-between">
+
+          <div className="d-flex flex-row mb-4.5 justify-content-between">
             <Form.Group
               className="w-100 m-0"
               isInvalid={isFormikFieldInvalid('title', {
@@ -349,7 +401,7 @@ function PostEditor({
             </Form.Group>
             {canDisplayEditReason && (
               <Form.Group
-                className="w-100 ml-3 mb-0"
+                className="w-100 ml-4 mb-0"
                 isInvalid={isFormikFieldInvalid('editReasonCode', {
                   errors,
                   touched,
@@ -374,7 +426,7 @@ function PostEditor({
               </Form.Group>
             )}
           </div>
-          <div className="mb-2">
+          <div className="mb-3">
             <TinyMCEEditor
               onInit={
                 /* istanbul ignore next: TinyMCE is mocked so this cannot be easily tested */
@@ -392,7 +444,7 @@ function PostEditor({
 
           <PostPreviewPane htmlNode={values.comment} isPost editExisting={editExisting} />
 
-          <div className="d-flex flex-row mt-n4.5 w-75 text-primary">
+          <div className="d-flex flex-row mt-n4 w-75 text-primary">
             {!editExisting && (
               <>
                 <Form.Group>
@@ -403,7 +455,9 @@ function PostEditor({
                     onBlur={handleBlur}
                     className="mr-4.5"
                   >
-                    {intl.formatMessage(messages.followPost)}
+                    <span className="font-size-14">
+                      {intl.formatMessage(messages.followPost)}
+                    </span>
                   </Form.Checkbox>
                 </Form.Group>
                 {allowAnonymousToPeers && (
@@ -414,7 +468,9 @@ function PostEditor({
                     onChange={handleChange}
                     onBlur={handleBlur}
                   >
-                    {intl.formatMessage(messages.anonymousToPeersPost)}
+                    <span className="font-size-14">
+                      {intl.formatMessage(messages.anonymousToPeersPost)}
+                    </span>
                   </Form.Checkbox>
                 </Form.Group>
                 )}
@@ -422,7 +478,7 @@ function PostEditor({
             )}
           </div>
 
-          <div className="d-flex justify-content-end mt-2.5">
+          <div className="d-flex justify-content-end">
             <Button
               variant="outline-primary"
               onClick={() => hideEditor(resetForm)}

src/discussions/posts/post-editor/PostEditor.test.jsx

@@ -12,13 +12,13 @@ import { initializeMockApp } from '@edx/frontend-platform';
 import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
 import { AppProvider } from '@edx/frontend-platform/react';
 
-import { API_BASE_URL, Routes } from '../../../data/constants';
+import { getApiBaseUrl, Routes } from '../../../data/constants';
 import { initializeStore } from '../../../store';
 import { executeThunk } from '../../../test-utils';
 import { getCohortsApiUrl } from '../../cohorts/data/api';
 import { DiscussionContext } from '../../common/context';
 import { fetchCourseTopics } from '../../topics/data/thunks';
-import { threadsApiUrl } from '../data/api';
+import { getThreadsApiUrl } from '../data/api';
 import { fetchThread } from '../data/thunks';
 import { PostEditor } from '../index';
 
@@ -28,7 +28,8 @@ import '../../topics/data/__factories__';
 import '../data/__factories__';
 
 const courseId = 'course-v1:edX+DemoX+Demo_Course';
-const topicsApiUrl = `${API_BASE_URL}/api/discussion/v1/course_topics/${courseId}`;
+const topicsApiUrl = `${getApiBaseUrl()}/api/discussion/v1/course_topics/${courseId}`;
+const threadsApiUrl = getThreadsApiUrl();
 let store;
 let axiosMock;
 

src/discussions/posts/post-editor/messages.js

@@ -131,6 +131,16 @@ const messages = defineMessages({
     defaultMessage: 'Unnamed subcategory',
     description: 'display string for topics with missing names',
   },
+  noThreadFound: {
+    id: 'discussion.thread.notFound',
+    defaultMessage: 'Thread not found',
+    description: 'message to show on screen if the request thread is not found in course',
+  },
+  archivedTopics: {
+    id: 'discussions.topics.archived.label',
+    defaultMessage: 'Archived',
+    description: 'Heading for displaying topics that are archived.',
+  },
 });
 
 export default messages;

src/discussions/posts/post-filter-bar/PostFilterBar.jsx

@@ -8,6 +8,7 @@ import { capitalize, isEmpty, toString } from 'lodash';
 import { useDispatch, useSelector } from 'react-redux';
 import { useParams } from 'react-router-dom';
 
+import { sendTrackEvent } from '@edx/frontend-platform/analytics';
 import { injectIntl, intlShape } from '@edx/frontend-platform/i18n';
 import {
   Collapsible, Form, Icon, Spinner,
@@ -84,6 +85,13 @@ function PostFilterBar({
       name,
       value,
     } = event.currentTarget;
+    const filterContentEventProperties = {
+      statusFilter: currentStatus,
+      threadTypeFilter: currentType,
+      sortFilter: currentSorting,
+      cohortFilter: selectedCohort,
+      triggeredBy: name,
+    };
     if (name === 'type') {
       dispatch(setPostsTypeFilter(value));
       if (
@@ -92,6 +100,7 @@ function PostFilterBar({
         // You can't filter discussions by unanswered
         dispatch(setStatusFilter(PostsStatusFilter.ALL));
       }
+      filterContentEventProperties.threadTypeFilter = value;
     }
     if (name === 'status') {
       dispatch(setStatusFilter(value));
@@ -103,13 +112,17 @@ function PostFilterBar({
         // You can't filter questions by not responded so switch type to discussion
         dispatch(setPostsTypeFilter(ThreadType.DISCUSSION));
       }
+      filterContentEventProperties.statusFilter = value;
     }
     if (name === 'sort') {
       dispatch(setSortedBy(value));
+      filterContentEventProperties.sortFilter = value;
     }
     if (name === 'cohort') {
       dispatch(setCohortFilter(value));
+      filterContentEventProperties.cohortFilter = value;
     }
+    sendTrackEvent('edx.forum.filter.content', filterContentEventProperties);
   };
 
   useEffect(() => {
@@ -135,12 +148,15 @@ function PostFilterBar({
             cohort: capitalize(selectedCohort?.name),
           })}
         </span>
-        <Collapsible.Visible whenClosed>
-          <Icon src={Tune} />
-        </Collapsible.Visible>
-        <Collapsible.Visible whenOpen>
-          <Icon src={Tune} />
-        </Collapsible.Visible>
+        <span id="icon-tune">
+          <Collapsible.Visible whenClosed>
+            <Icon src={Tune} />
+          </Collapsible.Visible>
+          <Collapsible.Visible whenOpen>
+            <Icon src={Tune} />
+          </Collapsible.Visible>
+        </span>
+
       </Collapsible.Trigger>
       <Collapsible.Body className="collapsible-body px-4 pb-3 pt-0">
         <Form>

src/discussions/posts/post/Post.jsx

@@ -1,6 +1,7 @@
-import React from 'react';
+import React, { useContext } from 'react';
 import PropTypes from 'prop-types';
 
+import classNames from 'classnames';
 import { useDispatch, useSelector } from 'react-redux';
 import { useHistory, useLocation } from 'react-router-dom';
 
@@ -10,7 +11,8 @@ import { Hyperlink, useToggle } from '@edx/paragon';
 import HTMLLoader from '../../../components/HTMLLoader';
 import { ContentActions } from '../../../data/constants';
 import { selectorForUnitSubsection, selectTopicContext } from '../../../data/selectors';
-import { AlertBanner, DeleteConfirmation } from '../../common';
+import { AlertBanner, Confirmation } from '../../common';
+import { DiscussionContext } from '../../common/context';
 import { selectModerationSettings } from '../../data/selectors';
 import { selectTopic } from '../../topics/data/selectors';
 import { removeThread, updateExistingThread } from '../data/thunks';
@@ -28,13 +30,38 @@ function Post({
   const location = useLocation();
   const history = useHistory();
   const dispatch = useDispatch();
+  const { enableInContextSidebar } = useContext(DiscussionContext);
   const { courseId } = useSelector((state) => state.courseTabs);
   const topic = useSelector(selectTopic(post.topicId));
   const getTopicSubsection = useSelector(selectorForUnitSubsection);
   const topicContext = useSelector(selectTopicContext(post.topicId));
   const { reasonCodesEnabled } = useSelector(selectModerationSettings);
   const [isDeleting, showDeleteConfirmation, hideDeleteConfirmation] = useToggle(false);
+  const [isReporting, showReportConfirmation, hideReportConfirmation] = useToggle(false);
   const [isClosing, showClosePostModal, hideClosePostModal] = useToggle(false);
+
+  const handleAbusedFlag = () => {
+    if (post.abuseFlagged) {
+      dispatch(updateExistingThread(post.id, { flagged: !post.abuseFlagged }));
+    } else {
+      showReportConfirmation();
+    }
+  };
+
+  const handleDeleteConfirmation = async () => {
+    await dispatch(removeThread(post.id));
+    history.push({
+      pathname: '.',
+      search: enableInContextSidebar && '?inContextSidebar',
+    });
+    hideDeleteConfirmation();
+  };
+
+  const handleReportConfirmation = () => {
+    dispatch(updateExistingThread(post.id, { flagged: !post.abuseFlagged }));
+    hideReportConfirmation();
+  };
+
   const actionHandlers = {
     [ContentActions.EDIT_CONTENT]: () => history.push({
       ...location,
@@ -52,7 +79,7 @@ function Post({
     },
     [ContentActions.COPY_LINK]: () => { navigator.clipboard.writeText(`${window.location.origin}/${courseId}/posts/${post.id}`); },
     [ContentActions.PIN]: () => dispatch(updateExistingThread(post.id, { pinned: !post.pinned })),
-    [ContentActions.REPORT]: () => dispatch(updateExistingThread(post.id, { flagged: !post.abuseFlagged })),
+    [ContentActions.REPORT]: () => handleAbusedFlag(),
   };
 
   const getTopicCategoryName = topicData => (
@@ -61,30 +88,50 @@ function Post({
 
   return (
     <div className="d-flex flex-column w-100 mw-100" data-testid={`post-${post.id}`}>
-      <DeleteConfirmation
+      <Confirmation
         isOpen={isDeleting}
         title={intl.formatMessage(messages.deletePostTitle)}
         description={intl.formatMessage(messages.deletePostDescription)}
         onClose={hideDeleteConfirmation}
-        onDelete={() => {
-          dispatch(removeThread(post.id));
-          history.push('.');
-          hideDeleteConfirmation();
-        }}
+        comfirmAction={handleDeleteConfirmation}
+        closeButtonVaraint="tertiary"
+        confirmButtonText={intl.formatMessage(messages.deleteConfirmationDelete)}
       />
+      {!post.abuseFlagged && (
+        <Confirmation
+          isOpen={isReporting}
+          title={intl.formatMessage(messages.reportPostTitle)}
+          description={intl.formatMessage(messages.reportPostDescription)}
+          onClose={hideReportConfirmation}
+          comfirmAction={handleReportConfirmation}
+          confirmButtonVariant="danger"
+        />
+      )}
       <AlertBanner content={post} />
       <PostHeader post={post} actionHandlers={actionHandlers} />
       <div className="d-flex mt-4 mb-2 text-break font-style-normal text-primary-500">
         <HTMLLoader htmlNode={post.renderedBody} id="post" />
       </div>
       {topicContext && topic && (
-        <div className="border px-3 rounded mb-4 border-light-400 align-self-start py-2.5">
+        <div className={classNames('border px-3 rounded mb-4 border-light-400 align-self-start py-2.5',
+          { 'w-100': enableInContextSidebar })}
+        >
           <span className="text-gray-500">{intl.formatMessage(messages.relatedTo)}{' '}</span>
           <Hyperlink
             destination={topicContext.unitLink}
             target="_top"
           >
-            {`${getTopicCategoryName(topic)} / ${topic.name}`}
+            {enableInContextSidebar
+              ? (
+                <>
+                  <span className="w-auto">{topicContext.chapterName}</span>
+                  <span className="mx-1">/</span>
+                  <span className="w-auto">{topicContext.verticalName}</span>
+                  <span className="mx-1">/</span>
+                  <span className="w-auto">{topicContext.unitName}</span>
+                </>
+              )
+              : `${getTopicCategoryName(topic)} / ${topic.name}`}
           </Hyperlink>
         </div>
       )}

src/discussions/posts/post/PostHeader.jsx

@@ -22,11 +22,11 @@ export function PostAvatar({
   const outlineColor = AvatarOutlineAndLabelColors[authorLabel];
 
   const avatarSize = useMemo(() => {
-    let size = '1.75rem';
+    let size = '2rem';
     if (post.type === ThreadType.DISCUSSION && !fromPostLink) {
       size = '2.375rem';
     } else if (post.type === ThreadType.QUESTION) {
-      size = '1.375rem';
+      size = '1.5rem';
     }
     return size;
   }, [post.type]);

src/discussions/posts/post/PostLink.jsx

@@ -15,8 +15,8 @@ import AuthorLabel from '../../common/AuthorLabel';
 import { DiscussionContext } from '../../common/context';
 import { discussionsPath, isPostPreviewAvailable } from '../../utils';
 import messages from './messages';
-import PostFooter from './PostFooter';
 import { PostAvatar } from './PostHeader';
+import PostSummaryFooter from './PostSummaryFooter';
 import { postShape } from './proptypes';
 
 function PostLink({
@@ -29,12 +29,12 @@ function PostLink({
   const {
     page,
     postId,
-    inContext,
+    enableInContextSidebar,
     category,
     learnerUsername,
   } = useContext(DiscussionContext);
   const linkUrl = discussionsPath(Routes.COMMENTS.PAGES[page], {
-    0: inContext ? 'in-context' : undefined,
+    0: enableInContextSidebar ? 'in-context' : undefined,
     courseId: post.courseId,
     topicId: post.topicId,
     postId: post.id,
@@ -56,24 +56,20 @@ function PostLink({
         }
         to={linkUrl}
         onClick={() => isSelected(post.id)}
-        style={{ lineHeight: '22px' }}
         aria-current={isSelected(post.id) ? 'page' : undefined}
         role="option"
         tabIndex={(isSelected(post.id) || idx === 0) ? 0 : -1}
       >
         <div
           className={
-            classNames('d-flex flex-row pt-2.5 pb-2 px-4 border-primary-500 position-relative',
-              { 'bg-light-300': read })
+            classNames('d-flex flex-row pt-2 pb-2 px-4 border-primary-500 position-relative',
+              { 'bg-light-300': read },
+              { 'post-summary-card-selected': post.id === postId })
           }
-          style={post.id === postId ? {
-            borderRightWidth: '4px',
-            borderRightStyle: 'solid',
-          } : null}
         >
           <PostAvatar post={post} authorLabel={post.authorLabel} fromPostLink read={read} />
           <div className="d-flex flex-column flex-fill" style={{ minWidth: 0 }}>
-            <div className="d-flex flex-column justify-content-start mw-100 flex-fill">
+            <div className="d-flex flex-column justify-content-start mw-100 flex-fill" style={{ marginBottom: '-3px' }}>
               <div className="d-flex align-items-center pb-0 mb-0 flex-fill font-weight-500">
                 <Truncate lines={1} className="mr-1.5" whiteSpace>
                   <span
@@ -100,20 +96,20 @@ function PostLink({
                 )}
 
                 {canSeeReportedBadge && (
-                <Badge
-                  variant="danger"
-                  data-testid="reported-post"
-                  className={`font-weight-500 badge-padding ${showAnsweredBadge ? 'ml-2' : 'ml-auto'}`}
-                >
-                  {intl.formatMessage(messages.contentReported)}
-                  <span className="sr-only">{' '}reported</span>
-                </Badge>
+                  <Badge
+                    variant="danger"
+                    data-testid="reported-post"
+                    className={`font-weight-500 badge-padding ${showAnsweredBadge ? 'ml-2' : 'ml-auto'}`}
+                  >
+                    {intl.formatMessage(messages.contentReported)}
+                    <span className="sr-only">{' '}reported</span>
+                  </Badge>
                 )}
 
                 {post.pinned && (
                 <Icon
                   src={PushPin}
-                  className={`icon-size ${canSeeReportedBadge || showAnsweredBadge ? 'ml-2' : 'ml-auto'}`}
+                  className={`post-summary-icons-dimensions text-gray-700 ${canSeeReportedBadge || showAnsweredBadge ? 'ml-2' : 'ml-auto'}`}
                 />
                 )}
               </div>
@@ -123,7 +119,7 @@ function PostLink({
               authorLabel={post.authorLabel}
               labelColor={authorLabelColor && `text-${authorLabelColor}`}
             />
-            <PostFooter post={post} preview intl={intl} showNewCountLabel={read} />
+            <PostSummaryFooter post={post} preview showNewCountLabel={read} />
           </div>
         </div>
         {!showDivider && post.pinned && <div className="pt-1 bg-light-500 border-top border-light-700" />}

src/discussions/posts/post/PostLink.test.jsx

@@ -11,11 +11,12 @@ import { AppProvider } from '@edx/frontend-platform/react';
 import { initializeStore } from '../../../store';
 import { executeThunk } from '../../../test-utils';
 import { DiscussionContext } from '../../common/context';
-import { courseConfigApiUrl } from '../../data/api';
+import { getCourseConfigApiUrl } from '../../data/api';
 import { fetchCourseConfig } from '../../data/thunks';
 import PostLink from './PostLink';
 
 const courseId = 'course-v1:edX+DemoX+Demo_Course';
+const courseConfigApiUrl = getCourseConfigApiUrl();
 let store;
 let axiosMock;
 

src/discussions/posts/post/PostSummaryFooter.jsx

@@ -0,0 +1,147 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+
+import { useSelector } from 'react-redux';
+import * as timeago from 'timeago.js';
+
+import { injectIntl, intlShape } from '@edx/frontend-platform/i18n';
+import {
+  Badge, Icon, OverlayTrigger, Tooltip,
+} from '@edx/paragon';
+import {
+  Locked,
+} from '@edx/paragon/icons';
+
+import {
+  People,
+  QuestionAnswer,
+  QuestionAnswerOutline,
+  StarFilled,
+  StarOutline, ThumbUpFilled, ThumbUpOutline,
+} from '../../../components/icons';
+import timeLocale from '../../common/time-locale';
+import { selectUserHasModerationPrivileges } from '../../data/selectors';
+import messages from './messages';
+import { postShape } from './proptypes';
+
+function PostSummaryFooter({
+  post,
+  intl,
+  preview,
+  showNewCountLabel,
+}) {
+  const userHasModerationPrivileges = useSelector(selectUserHasModerationPrivileges);
+  timeago.register('time-locale', timeLocale);
+
+  return (
+    <div className="d-flex align-items-center text-gray-700">
+      <div className="d-flex align-items-center mr-4.5">
+        <OverlayTrigger
+          overlay={(
+            <Tooltip id={`liked-${post.id}-tooltip`}>
+              {intl.formatMessage(post.voted ? messages.likedPost : messages.postLikes)}
+            </Tooltip>
+          )}
+        >
+          <Icon src={post.voted ? ThumbUpFilled : ThumbUpOutline} className="post-summary-icons-dimensions mr-0.5">
+            <span className="sr-only">{' '}{intl.formatMessage(post.voted ? messages.likedPost : messages.postLikes)}</span>
+          </Icon>
+        </OverlayTrigger>
+        <div className="font-family-inter font-style-normal">
+          {(post.voteCount && post.voteCount > 0) ? post.voteCount : null}
+        </div>
+      </div>
+
+      <OverlayTrigger
+        overlay={(
+          <Tooltip id={`follow-${post.id}-tooltip`}>
+            {intl.formatMessage(post.following ? messages.followed : messages.notFollowed)}
+          </Tooltip>
+        )}
+      >
+        <Icon src={post.following ? StarFilled : StarOutline} className="post-summary-icons-dimensions mr-0.5">
+          <span className="sr-only">{' '}{ intl.formatMessage(post.following ? messages.srOnlyFollowDescription : messages.srOnlyUnFollowDescription)}</span>
+        </Icon>
+      </OverlayTrigger>
+
+      {preview && post.commentCount > 1 && (
+        <div className="d-flex align-items-center ml-4.5">
+          <OverlayTrigger
+            overlay={(
+              <Tooltip id={`follow-${post.id}-tooltip`}>
+                {intl.formatMessage(messages.activity)}
+              </Tooltip>
+            )}
+          >
+            <Icon src={post.unreadCommentCount ? QuestionAnswer : QuestionAnswerOutline} className="post-summary-icons-dimensions mr-0.5">
+              <span className="sr-only">{' '} {intl.formatMessage(messages.activity)}</span>
+            </Icon>
+          </OverlayTrigger>
+          {post.commentCount}
+        </div>
+      )}
+      {showNewCountLabel && preview && post?.unreadCommentCount > 0 && post.commentCount > 1 && (
+        <Badge variant="light" className="ml-2">
+          {intl.formatMessage(messages.newLabel, { count: post.unreadCommentCount })}
+        </Badge>
+      )}
+      <div className="d-flex flex-fill justify-content-end align-items-center">
+        {post.groupId && userHasModerationPrivileges && (
+          <>
+            <OverlayTrigger
+              overlay={(
+                <Tooltip id={`visibility-${post.id}-tooltip`}>{post.groupName}</Tooltip>
+              )}
+            >
+              <span data-testid="cohort-icon" className="post-summary-icons-dimensions">
+                <People />
+              </span>
+            </OverlayTrigger>
+            <span
+              className="text-gray-700 mx-1.5 font-weight-500"
+              style={{ fontSize: '16px' }}
+            >
+              ·
+            </span>
+          </>
+        )}
+        <span title={post.createdAt} className="text-gray-700 post-summary-timestamp">
+          {timeago.format(post.createdAt, 'time-locale')}
+        </span>
+        {!preview && post.closed
+          && (
+            <OverlayTrigger
+              overlay={(
+                <Tooltip id={`closed-${post.id}-tooltip`}>
+                  {intl.formatMessage(messages.postClosed)}
+                </Tooltip>
+              )}
+            >
+              <Icon
+                src={Locked}
+                style={{
+                  width: '1rem',
+                  height: '1rem',
+                }}
+                className="ml-3 post-summary-icons-dimensions"
+              />
+            </OverlayTrigger>
+          )}
+      </div>
+    </div>
+  );
+}
+
+PostSummaryFooter.propTypes = {
+  intl: intlShape.isRequired,
+  post: postShape.isRequired,
+  preview: PropTypes.bool,
+  showNewCountLabel: PropTypes.bool,
+};
+
+PostSummaryFooter.defaultProps = {
+  preview: false,
+  showNewCountLabel: false,
+};
+
+export default injectIntl(PostSummaryFooter);

src/discussions/posts/post/messages.js

@@ -28,6 +28,16 @@ const messages = defineMessages({
     defaultMessage: 'Follow',
     description: 'Tooltip/alttext for button to follow a discussion post',
   },
+  followed: {
+    id: 'discussions.post.followed',
+    defaultMessage: 'Followed',
+    description: 'Tooltip/alttext for follow icon showing user followed a post',
+  },
+  notFollowed: {
+    id: 'discussions.post.notFollowed',
+    defaultMessage: 'Not Followed',
+    description: 'Tooltip/alttext for follow icon showing user not following a post',
+  },
   answered: {
     id: 'discussions.post.answered',
     defaultMessage: 'Answered',
@@ -48,11 +58,26 @@ const messages = defineMessages({
     defaultMessage: 'Unlike',
     description: 'Tooltip/alttext for button to remove the like applied to a discussion post',
   },
+  likedPost: {
+    id: 'discussions.post.liked',
+    defaultMessage: 'liked',
+    description: 'Tooltip/alttext for like icon to tell user this post is liked by user',
+  },
+  postLikes: {
+    id: 'discussions.post.likes',
+    defaultMessage: 'likes',
+    description: 'Tooltip/alttext for like icon to tell user about like on the post',
+  },
   viewActivity: {
     id: 'discussions.post.viewActivity',
     defaultMessage: 'View activity',
     description: 'Tooltip/alttext for button to view the activity of a discussion post',
   },
+  activity: {
+    id: 'discussions.post.activity',
+    defaultMessage: 'Activity',
+    description: 'Tooltip/alttext for icon for showing icon represents activity on a post',
+  },
   postClosed: {
     id: 'discussions.post.closed',
     defaultMessage: 'Post closed for responses and comments',
@@ -71,6 +96,21 @@ const messages = defineMessages({
     id: 'discussions.editor.delete.post.description',
     defaultMessage: 'Are you sure you want to permanently delete this post?',
   },
+  deleteConfirmationDelete: {
+    id: 'discussions.post.delete.confirmation.button.delete',
+    defaultMessage: 'Delete',
+    description: 'Delete button shown on delete confirmation dialog',
+  },
+  reportPostTitle: {
+    id: 'discussions.editor.report.post.title',
+    defaultMessage: 'Report inappropriate content?',
+    description: 'Title of confirmation dialog shown when reporting a post',
+  },
+  reportPostDescription: {
+    id: 'discussions.editor.report.post.description',
+    defaultMessage: 'The discussion moderation team will review this content and take appropriate action.',
+    description: 'Text displayed in confirmation dialog when deleting a post',
+  },
   closePostModalTitle: {
     id: 'discussions.post.closePostModal.title',
     defaultMessage: 'Close post',
@@ -116,6 +156,16 @@ const messages = defineMessages({
     defaultMessage: 'No preview available',
     description: 'No preview available',
   },
+  srOnlyFollowDescription: {
+    id: 'discussions.post.follow.description',
+    defaultMessage: 'you are following this post',
+    description: 'tell screen readers if user is following a post',
+  },
+  srOnlyUnFollowDescription: {
+    id: 'discussions.post.unfollow.description',
+    defaultMessage: 'you are not following this post',
+    description: 'tell screen readers if user is not following a post',
+  },
 });
 
 export default messages;

src/discussions/topics/TopicsView.jsx

@@ -4,17 +4,15 @@ import { useDispatch, useSelector } from 'react-redux';
 import { useParams } from 'react-router';
 
 import SearchInfo from '../../components/SearchInfo';
-import { DiscussionProvider, RequestStatus } from '../../data/constants';
-import { selectSequences } from '../../data/selectors';
+import { RequestStatus } from '../../data/constants';
 import { DiscussionContext } from '../common/context';
 import { selectDiscussionProvider } from '../data/selectors';
 import NoResults from '../posts/NoResults';
+import { handleKeyDown } from '../utils';
 import { selectCategories, selectNonCoursewareTopics, selectTopicFilter } from './data/selectors';
 import { setFilter, setTopicsCount } from './data/slices';
 import { fetchCourseTopics } from './data/thunks';
-import ArchivedTopicGroup from './topic-group/ArchivedTopicGroup';
 import LegacyTopicGroup from './topic-group/LegacyTopicGroup';
-import SequenceTopicGroup from './topic-group/SequenceTopicGroup';
 import Topic from './topic-group/topic/Topic';
 import countFilteredTopics from './utils';
 
@@ -38,24 +36,6 @@ function CourseWideTopics() {
     ));
 }
 
-function CoursewareTopics() {
-  const sequences = useSelector(selectSequences);
-
-  return (
-    <>
-      { sequences?.map(
-        sequence => (
-          <SequenceTopicGroup
-            sequence={sequence}
-            key={sequence.id}
-          />
-        ),
-      )}
-      <ArchivedTopicGroup />
-    </>
-  );
-}
-
 function LegacyCoursewareTopics() {
   const { category } = useParams();
   const categories = useSelector(selectCategories)
@@ -80,20 +60,6 @@ function TopicsView() {
   const { courseId } = useContext(DiscussionContext);
   const dispatch = useDispatch();
 
-  const handleKeyDown = (event) => {
-    const { key } = event;
-    if (key !== 'ArrowDown' && key !== 'ArrowUp') { return; }
-    const option = event.target;
-
-    let selectedOption;
-    if (key === 'ArrowDown') { selectedOption = option.nextElementSibling; }
-    if (key === 'ArrowUp') { selectedOption = option.previousElementSibling; }
-
-    if (selectedOption) {
-      selectedOption.focus();
-    }
-  };
-
   useEffect(() => {
     // Don't load till the provider information is available
     if (provider) {
@@ -118,8 +84,7 @@ function TopicsView() {
       )}
       <div className="list-group list-group-flush flex-fill" role="list" onKeyDown={e => handleKeyDown(e)}>
         <CourseWideTopics />
-        {provider === DiscussionProvider.OPEN_EDX && <CoursewareTopics />}
-        {provider === DiscussionProvider.LEGACY && <LegacyCoursewareTopics />}
+        <LegacyCoursewareTopics />
       </div>
       {
         filteredTopicsCount === 0

src/discussions/topics/TopicsView.test.jsx

@@ -1,5 +1,5 @@
 import {
-  fireEvent, render, screen, within,
+  fireEvent, render, screen,
 } from '@testing-library/react';
 import MockAdapter from 'axios-mock-adapter';
 import { IntlProvider } from 'react-intl';
@@ -10,11 +10,7 @@ import { initializeMockApp } from '@edx/frontend-platform';
 import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
 import { AppProvider } from '@edx/frontend-platform/react';
 
-import { getBlocksAPIResponse } from '../../data/__factories__';
-import { blocksAPIURL } from '../../data/api';
-import { API_BASE_URL, DiscussionProvider } from '../../data/constants';
-import { selectSequences } from '../../data/selectors';
-import { fetchCourseBlocks } from '../../data/thunks';
+import { getApiBaseUrl } from '../../data/constants';
 import { initializeStore } from '../../store';
 import { executeThunk } from '../../test-utils';
 import { DiscussionContext } from '../common/context';
@@ -26,8 +22,7 @@ import './data/__factories__';
 
 const courseId = 'course-v1:edX+DemoX+Demo_Course';
 
-const topicsApiUrl = `${API_BASE_URL}/api/discussion/v1/course_topics/${courseId}`;
-const topicsv2ApiUrl = `${API_BASE_URL}/api/discussion/v2/course_topics/${courseId}`;
+const topicsApiUrl = `${getApiBaseUrl()}/api/discussion/v1/course_topics/${courseId}`;
 let store;
 let axiosMock;
 let lastLocation;
@@ -57,131 +52,86 @@ function renderComponent() {
   );
 }
 
-describe('TopicsView', () => {
-  describe.each(['legacy', 'openedx'])('%s provider', (provider) => {
-    let inContextTopics;
-    let globalTopics;
-    let categories;
-    beforeEach(() => {
-      initializeMockApp({
-        authenticatedUser: {
-          userId: 3,
-          username: 'abc123',
-          administrator: true,
-          roles: [],
-        },
-      });
-
-      store = initializeStore({
-        config: { provider },
-        blocks: {
-          topics: {},
-        },
-      });
-      Factory.resetAll();
-      axiosMock = new MockAdapter(getAuthenticatedHttpClient());
-      lastLocation = undefined;
+describe('Legacy Topics View', () => {
+  let inContextTopics;
+  let globalTopics;
+  let categories;
+  beforeEach(() => {
+    initializeMockApp({
+      authenticatedUser: {
+        userId: 3,
+        username: 'abc123',
+        administrator: true,
+        roles: [],
+      },
     });
 
-    async function setupMockResponse() {
-      if (provider === 'legacy') {
-        axiosMock
-          .onGet(topicsApiUrl)
-          .reply(200, {
-            courseware_topics: Factory.buildList('category', 2),
-            non_courseware_topics: Factory.buildList('topic', 3, {}, { topicPrefix: 'ncw' }),
-          });
-        await executeThunk(fetchCourseTopics(courseId), store.dispatch, store.getState);
-        const state = store.getState();
-        categories = state.topics.categoryIds;
-        globalTopics = selectNonCoursewareTopics(state);
-        inContextTopics = selectCoursewareTopics(state);
-      } else {
-        const blocksAPIResponse = getBlocksAPIResponse(true);
-        const ids = Object.values(blocksAPIResponse.blocks).filter(block => block.type === 'vertical')
-          .map(block => block.block_id);
-        const deletedIds = [
-          'block-v1:edX+DemoX+Demo_Course+type@vertical+block@deleted-vertical-1',
-          'block-v1:edX+DemoX+Demo_Course+type@vertical+block@deleted-vertical-2',
-        ];
-        const data = [
-          ...Factory.buildList('topic.v2', 2, { usage_key: null }, { topicPrefix: 'ncw' }),
-          ...ids.map(id => Factory.build('topic.v2', { id })),
-          ...deletedIds.map(id => Factory.build('topic.v2', { id, enabled_in_context: false }, { topicPrefix: 'archived ' })),
-        ];
-
-        axiosMock
-          .onGet(topicsv2ApiUrl)
-          .reply(200, data);
-        axiosMock.onGet(blocksAPIURL)
-          .reply(200, getBlocksAPIResponse(true));
-        axiosMock.onAny().networkError();
-        await executeThunk(fetchCourseBlocks(courseId, 'abc123'), store.dispatch, store.getState);
-        await executeThunk(fetchCourseTopics(courseId), store.dispatch, store.getState);
-        const state = store.getState();
-        categories = selectSequences(state);
-        globalTopics = selectNonCoursewareTopics(state);
-        inContextTopics = selectCoursewareTopics(state);
-      }
-    }
-
-    it('displays non-courseware topics', async () => {
-      await setupMockResponse();
-      renderComponent();
-
-      globalTopics.forEach(topic => {
-        expect(screen.queryByText(topic.name)).toBeInTheDocument();
-      });
+    store = initializeStore({
+      config: { provider: 'legacy' },
+      blocks: {
+        topics: {},
+      },
     });
+    Factory.resetAll();
+    axiosMock = new MockAdapter(getAuthenticatedHttpClient());
+    lastLocation = undefined;
+  });
 
-    it('displays non-courseware outside of a topic group', async () => {
-      await setupMockResponse();
-      renderComponent();
-
-      categories.forEach(category => {
-        // For the new provider categories are blocks so use the display name
-        // otherwise use the category itself which is a string
-        expect(screen.queryByText(category.displayName || category)).toBeInTheDocument();
+  async function setupMockResponse() {
+    axiosMock
+      .onGet(topicsApiUrl)
+      .reply(200, {
+        courseware_topics: Factory.buildList('category', 2),
+        non_courseware_topics: Factory.buildList('topic', 3, {}, { topicPrefix: 'ncw' }),
       });
+    await executeThunk(fetchCourseTopics(courseId), store.dispatch, store.getState);
+    const state = store.getState();
+    categories = state.topics.categoryIds;
+    globalTopics = selectNonCoursewareTopics(state);
+    inContextTopics = selectCoursewareTopics(state);
+  }
 
-      const topicGroups = screen.queryAllByTestId('topic-group');
-      // For the new provider there should be a section for archived topics
-      expect(topicGroups).toHaveLength(
-        provider === DiscussionProvider.LEGACY
-          ? categories.length
-          : categories.length + 1,
-      );
-    });
+  it('displays non-courseware topics', async () => {
+    await setupMockResponse();
+    renderComponent();
 
-    if (provider === DiscussionProvider.OPEN_EDX) {
-      it('displays archived topics', async () => {
-        await setupMockResponse();
-        renderComponent();
-        const archivedTopicGroup = screen.queryAllByTestId('topic-group').pop();
-        expect(archivedTopicGroup).toHaveTextContent(/archived/i);
-        const archivedTopicLinks = within(archivedTopicGroup).queryAllByRole('option');
-        expect(archivedTopicLinks).toHaveLength(2);
-      });
-    }
-
-    it('displays courseware topics', async () => {
-      await setupMockResponse();
-      renderComponent();
-
-      inContextTopics.forEach(topic => {
-        expect(screen.queryByText(topic.name)).toBeInTheDocument();
-      });
-    });
-
-    it('clicking on courseware topic (category) takes to category page', async () => {
-      await setupMockResponse();
-      renderComponent();
-
-      const categoryName = categories[0].displayName || categories[0];
-      const categoryPath = provider === 'legacy' ? categoryName : categories[0].id;
-      const topic = await screen.findByText(categoryName);
-      fireEvent.click(topic);
-      expect(lastLocation.pathname.endsWith(`/category/${categoryPath}`)).toBeTruthy();
+    globalTopics.forEach(topic => {
+      expect(screen.queryByText(topic.name)).toBeInTheDocument();
     });
   });
+
+  it('displays non-courseware outside of a topic group', async () => {
+    await setupMockResponse();
+    renderComponent();
+
+    categories.forEach(category => {
+      // For the new provider categories are blocks so use the display name
+      // otherwise use the category itself which is a string
+      expect(screen.queryByText(category.displayName || category)).toBeInTheDocument();
+    });
+
+    const topicGroups = screen.queryAllByTestId('topic-group');
+    // For the new provider there should be a section for archived topics
+    expect(topicGroups).toHaveLength(categories.length);
+  });
+
+  it('displays courseware topics', async () => {
+    await setupMockResponse();
+    renderComponent();
+
+    inContextTopics.forEach(topic => {
+      expect(screen.queryByText(topic.name)).toBeInTheDocument();
+    });
+  });
+
+  it('clicking on courseware topic (category) takes to category page', async () => {
+    await setupMockResponse();
+    renderComponent();
+
+    const categoryName = categories[0].displayName || categories[0];
+    const categoryPath = categoryName;
+    const topic = await screen.findByText(categoryName);
+    fireEvent.click(topic);
+    expect(lastLocation.pathname.endsWith(`/category/${categoryPath}`)).toBeTruthy();
+  });
 });

src/discussions/topics/data/api.js

@@ -1,21 +1,10 @@
 /* eslint-disable import/prefer-default-export */
 import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
 
-import { API_BASE_URL } from '../../../data/constants';
+import { getApiBaseUrl } from '../../../data/constants';
 
 export async function getCourseTopics(courseId, topicIds) {
-  const url = `${API_BASE_URL}/api/discussion/v1/course_topics/${courseId}`;
-  const params = {};
-  if (topicIds) {
-    params.topic_id = topicIds.join(',');
-  }
-  const { data } = await getAuthenticatedHttpClient()
-    .get(url);
-  return data;
-}
-
-export async function getCourseTopicsV2(courseId, topicIds) {
-  const url = `${API_BASE_URL}/api/discussion/v2/course_topics/${courseId}`;
+  const url = `${getApiBaseUrl()}/api/discussion/v1/course_topics/${courseId}`;
   const params = {};
   if (topicIds) {
     params.topic_id = topicIds.join(',');

src/discussions/topics/data/selectors.js

@@ -2,10 +2,6 @@
 
 import { createSelector } from '@reduxjs/toolkit';
 
-import { DiscussionProvider } from '../../../data/constants';
-import { selectSequences } from '../../../data/selectors';
-import { selectDiscussionProvider } from '../../data/selectors';
-
 export const selectTopicFilter = state => state.topics.filter.trim()
   .toLowerCase();
 
@@ -19,29 +15,22 @@ export const selectTopicsInCategory = (categoryId) => state => (
 
 export const selectTopics = state => state.topics.topics;
 export const selectCoursewareTopics = createSelector(
-  selectDiscussionProvider,
   selectCategories,
   selectTopicCategoryMap,
   selectTopics,
-  selectSequences,
-  (provider, categoryIds, topicsInCategory, topics, sequences) => (
-    provider === DiscussionProvider.LEGACY
-      ? categoryIds.map(category => ({
-        id: category,
-        name: category,
-        topics: topicsInCategory[category].map(id => topics[id]),
-      }))
-      : sequences.map(sequence => ({
-        id: sequence.id,
-        name: sequence.displayName,
-        topics: sequence.topics.map(topicId => ({ id: topicId, name: topics[topicId]?.name || 'unnamed' })),
-      }))
+  (categoryIds, topicsInCategory, topics) => (
+    categoryIds.map(category => ({
+      id: category,
+      name: category,
+      topics: topicsInCategory[category].map(id => topics[id]),
+    }))
   ),
 );
 
 export const selectNonCoursewareIds = state => state.topics.nonCoursewareIds;
 
-export const selectNonCoursewareTopics = state => state.topics.nonCoursewareIds.map(id => state.topics.topics[id]);
+export const selectNonCoursewareTopics = state => state.topics.nonCoursewareIds?.map(id => state.topics.topics[id])
+  || [];
 
 export const selectTopic = topicId => state => state.topics.topics[topicId];
 

src/discussions/topics/data/slices.js

@@ -11,8 +11,6 @@ const topicsSlice = createSlice({
     categoryIds: [],
     // List of all non-courseware topics
     nonCoursewareIds: [],
-    // Topics that have been archived
-    archivedIds: [],
     // Mapping of all topics in each category
     topicsInCategory: {},
     // Map of topics ids to topic data
@@ -32,7 +30,6 @@ const topicsSlice = createSlice({
       state.topics = payload.topics;
       state.nonCoursewareIds = payload.nonCoursewareIds;
       state.categoryIds = payload.categoryIds;
-      state.archivedIds = payload.archivedIds;
       state.topicsInCategory = payload.topicsInCategory;
     },
     fetchCourseTopicsFailed: (state) => {

src/discussions/topics/data/thunks.js

@@ -2,8 +2,7 @@
 import { camelCaseObject } from '@edx/frontend-platform';
 import { logError } from '@edx/frontend-platform/logging';
 
-import { DiscussionProvider } from '../../../data/constants';
-import { getCourseTopics, getCourseTopicsV2 } from './api';
+import { getCourseTopics } from './api';
 import { fetchCourseTopicsFailed, fetchCourseTopicsRequest, fetchCourseTopicsSuccess } from './slices';
 
 function normaliseTopics(data) {
@@ -26,34 +25,12 @@ function normaliseTopics(data) {
   };
 }
 
-function normaliseTopicsV2(data) {
-  const nonCoursewareIds = [];
-  const topics = {};
-  const archivedIds = [];
-  data.forEach(topic => {
-    if (!topic.enabledInContext) {
-      archivedIds.push(topic.id);
-    } else if (topic.usageKey === null) {
-      nonCoursewareIds.push(topic.id);
-    }
-    topics[topic.id] = topic;
-  });
-  return {
-    topics, nonCoursewareIds, archivedIds,
-  };
-}
-
 export function fetchCourseTopics(courseId) {
-  return async (dispatch, getState) => {
+  return async (dispatch) => {
     try {
-      const { config } = getState();
       dispatch(fetchCourseTopicsRequest({ courseId }));
-      let data = {};
-      if (config.provider === DiscussionProvider.LEGACY) {
-        data = normaliseTopics(camelCaseObject(await getCourseTopics(courseId)));
-      } else if (config.provider === DiscussionProvider.OPEN_EDX) {
-        data = normaliseTopicsV2(camelCaseObject(await getCourseTopicsV2(courseId)));
-      }
+
+      const data = normaliseTopics(camelCaseObject(await getCourseTopics(courseId)));
       dispatch(fetchCourseTopicsSuccess(data));
     } catch (error) {
       dispatch(fetchCourseTopicsFailed());
@@ -61,16 +38,3 @@ export function fetchCourseTopics(courseId) {
     }
   };
 }
-
-export function fetchCourseTopicsV2(courseId) {
-  return async (dispatch) => {
-    try {
-      dispatch(fetchCourseTopicsRequest({ courseId }));
-      const data = await getCourseTopicsV2(courseId);
-      dispatch(fetchCourseTopicsSuccess(normaliseTopicsV2(camelCaseObject(data))));
-    } catch (error) {
-      dispatch(fetchCourseTopicsFailed());
-      logError(error);
-    }
-  };
-}

src/discussions/topics/utils.js

@@ -10,7 +10,7 @@ export default function countFilteredTopics(topicsSelector, provider) {
     ? item.name.toLowerCase().includes(query)
     : true
   ));
-  count += nonCoursewareTopicsList.length;
+  count += nonCoursewareTopicsList?.length;
   // Counting legacy topics
   if (provider === DiscussionProvider.LEGACY) {
     const categories = topicsSelector?.categoryIds;