feat: added help section for post documentation (#733)

* feat: added help section for post documentation

* refactor: refactor code

src/components/PostHelpPanel.jsx

@@ -0,0 +1,74 @@
+import React, { useState } from 'react';
+
+import {
+  Hyperlink, Icon, IconButton, IconButtonWithTooltip,
+} from '@openedx/paragon';
+import { Close, HelpOutline } from '@openedx/paragon/icons';
+
+import { useIntl } from '@edx/frontend-platform/i18n';
+
+import messages from '../discussions/posts/post-editor/messages';
+
+const PostHelpPanel = () => {
+  const intl = useIntl();
+  const [showHelpPane, setShowHelpPane] = useState(false);
+
+  return (
+    <>
+      <div className="d-flex justify-content-end">
+        <IconButtonWithTooltip
+          onClick={() => setShowHelpPane(true)}
+          alt={intl.formatMessage(messages.showHelpIcon)}
+          tooltipContent={<div>{intl.formatMessage(messages.discussionHelpTooltip)}</div>}
+          src={HelpOutline}
+          iconAs={Icon}
+          size="inline"
+          className="float-right p-3 help-icon"
+          iconClassNames="help-icon-size"
+          data-testid="help-button"
+          invertColors
+          isActive
+        />
+      </div>
+      {showHelpPane && (
+        <div
+          className="w-100 p-2 bg-light-200 rounded box-shadow-down-1 post-preview overflow-auto my-3"
+          style={{ minHeight: '200px', wordBreak: 'break-word' }}
+        >
+          <IconButton
+            onClick={() => setShowHelpPane(false)}
+            alt={intl.formatMessage(messages.actionsAlt)}
+            src={Close}
+            iconAs={Icon}
+            size="inline"
+            className="float-right p-3"
+            iconClassNames="icon-size"
+            data-testid="hide-help-button"
+          />
+          <div className="pt-2 px-3">
+            <h4 className="font-weight-bold">{intl.formatMessage(messages.discussionHelpHeader)}</h4>
+            <p className="pt-2">{intl.formatMessage(messages.discussionHelpDescription)}</p>
+            <Hyperlink
+              target="_blank"
+              className="w-100"
+              destination="https://support.edx.org/hc/en-us/sections/115004169687-Participating-in-Course-Discussions"
+              showLaunchIcon={false}
+            >
+              {intl.formatMessage(messages.discussionHelpCourseParticipation)}
+            </Hyperlink>
+            <Hyperlink
+              target="_blank"
+              className="w-100"
+              destination="https://support.edx.org/hc/en-us/articles/360000035267-Entering-math-expressions-in-course-discussions"
+              showLaunchIcon={false}
+            >
+              {intl.formatMessage(messages.discussionHelpMathExpressions)}
+            </Hyperlink>
+          </div>
+        </div>
+      )}
+    </>
+  );
+};
+
+export default React.memo(PostHelpPanel);

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

@@ -18,6 +18,7 @@ import { AppContext } from '@edx/frontend-platform/react';
 
 import { TinyMCEEditor } from '../../../components';
 import FormikErrorFeedback from '../../../components/FormikErrorFeedback';
+import PostHelpPanel from '../../../components/PostHelpPanel';
 import PostPreviewPanel from '../../../components/PostPreviewPanel';
 import useDispatchWithState from '../../../data/hooks';
 import selectCourseCohorts from '../../cohorts/data/selectors';
@@ -409,6 +410,7 @@ const PostEditor = ({
             onEditorChange={formikCompatibleHandler(handleChange, 'comment')}
             onBlur={formikCompatibleHandler(handleBlur, 'comment')}
           />
+          <PostHelpPanel />
           <FormikErrorFeedback name="comment" />
         </div>
         <PostPreviewPanel htmlNode={values.comment} isPost editExisting={editExisting} />

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

@@ -368,5 +368,34 @@ describe('PostEditor', () => {
         expect(container.querySelector('[data-testid="hide-preview-button"]')).not.toBeInTheDocument();
       });
     });
+
+    it('should show Help Panel', async () => {
+      await renderComponent(true, `/${courseId}/posts/${threadId}/edit`);
+
+      await act(async () => {
+        fireEvent.click(container.querySelector('[data-testid="help-button"]'));
+      });
+
+      await waitFor(() => {
+        expect(container.querySelector('[data-testid="hide-help-button"]')).toBeInTheDocument();
+      });
+    });
+
+    it('should hide Help Panel', async () => {
+      await renderComponent(true, `/${courseId}/posts/${threadId}/edit`);
+
+      await act(async () => {
+        fireEvent.click(container.querySelector('[data-testid="help-button"]'));
+      });
+
+      await act(async () => {
+        fireEvent.click(container.querySelector('[data-testid="hide-help-button"]'));
+      });
+
+      await waitFor(() => {
+        expect(container.querySelector('[data-testid="help-button"]')).toBeInTheDocument();
+        expect(container.querySelector('[data-testid="hide-help-button"]')).not.toBeInTheDocument();
+      });
+    });
   });
 });

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

@@ -116,6 +116,36 @@ const messages = defineMessages({
     defaultMessage: 'Show preview',
     description: 'show preview button text to allow user to see their post content.',
   },
+  showHelpIcon: {
+    id: 'discussions.editor.posts.showHelp.icon',
+    defaultMessage: 'Show Help',
+    description: 'show help icon to allow user to see important documentation.',
+  },
+  discussionHelpHeader: {
+    id: 'discussions.editor.posts.discussionHelpHeader',
+    defaultMessage: 'Discussions help',
+    description: 'header text for post help section.',
+  },
+  discussionHelpDescription: {
+    id: 'discussions.editor.posts.discussionHelpDescription',
+    defaultMessage: 'Course discussions give you the opportunity to start conversations, ask questions, and interact with other learners. See the links below to learn more:',
+    description: 'description message for post help section.',
+  },
+  discussionHelpCourseParticipation: {
+    id: 'discussions.editor.posts.discussionHelpCourseParticipation',
+    defaultMessage: 'Participating in course discussions',
+    description: 'Documentation link title for participating in course discussions.',
+  },
+  discussionHelpMathExpressions: {
+    id: 'discussions.editor.posts.discussionHelpMathExpressions',
+    defaultMessage: 'Entering math expressions in course discussions',
+    description: 'Documentation link title for entering math expressions in course discussions.',
+  },
+  discussionHelpTooltip: {
+    id: 'discussions.editor.posts.discussionHelpTooltip',
+    defaultMessage: 'Learn more about MathJax & LaTeX',
+    description: 'Tooltip help message for documentation help.',
+  },
   actionsAlt: {
     id: 'discussions.actions.label',
     defaultMessage: 'Actions menu',

src/index.scss

@@ -593,6 +593,15 @@ th, td {
   white-space: nowrap;
 }
 
+.help-icon {
+  margin: -47px -3px 0px 0px;
+}
+
+.help-icon-size {
+  height: 16px !important;
+  width: 16px !important;
+}
+
 @media only screen and (max-width: 367px) {
 
   .discussion-comments h5,
@@ -603,7 +612,8 @@ th, td {
   .pgn__modal,
   .pgn__form-label,
   .dropdown-menu,
-  .tox-tbtn {
+  .tox-tbtn, 
+  .tooltip {
     font-size: 10px !important;
   }
 
@@ -640,7 +650,8 @@ th, td {
   .pgn__form-label,
   .pgn__modal,
   .dropdown-menu,
-  .tox-tbtn {
+  .tox-tbtn,
+  .tooltip {
     font-size: 12px !important;
   }
 
@@ -659,7 +670,8 @@ th, td {
 @media only screen and (min-width: 769px) {
 
   body,
-  #main {
+  #main,
+  .tooltip {
     font-size: 14px;
   }
 }