fix: first section celebration

Fix the first section celebration modal showing logic.

On Nutmeg+ it's shown only after the page reload or after going directly
to the second section from the course home. Going through the course
with the Next/Previous buttons has no effect (which worked on Maple).

Notes:
- the weekly goal has the same showing logic, but I assume that is
correct behavior so no changes are added for it in this commit.
- showing a celebration modal for the first section completion when
going directly to the first unit of the second section seems to be a bug
(reproduces on Maple too)

src/courseware/course/Course.jsx

@@ -1,4 +1,4 @@
-import React, { useState } from 'react';
+import React, { useEffect, useState } from 'react';
 import PropTypes from 'prop-types';
 import { Helmet } from 'react-helmet';
 import { useDispatch } from 'react-redux';
@@ -43,10 +43,8 @@ const Course = ({
 
   // Below the tabs, above the breadcrumbs alerts (appearing in the order listed here)
   const dispatch = useDispatch();
-  const celebrateFirstSection = celebrations && celebrations.firstSection;
-  const [firstSectionCelebrationOpen, setFirstSectionCelebrationOpen] = useState(
-    shouldCelebrateOnSectionLoad(courseId, sequenceId, celebrateFirstSection, dispatch, celebrations),
-  );
+
+  const [firstSectionCelebrationOpen, setFirstSectionCelebrationOpen] = useState(false);
   // If streakLengthToCelebrate is populated, that modal takes precedence. Wait til the next load to display
   // the weekly goal celebration modal.
   const [weeklyGoalCelebrationOpen, setWeeklyGoalCelebrationOpen] = useState(
@@ -68,6 +66,17 @@ const Course = ({
     }
   }
 
+  useEffect(() => {
+    const celebrateFirstSection = celebrations && celebrations.firstSection;
+    setFirstSectionCelebrationOpen(shouldCelebrateOnSectionLoad(
+      courseId,
+      sequenceId,
+      celebrateFirstSection,
+      dispatch,
+      celebrations,
+    ));
+  }, [sequenceId]);
+
   return (
     <SidebarProvider courseId={courseId} unitId={unitId}>
       <Helmet>

src/courseware/course/celebration/CelebrationModal.jsx

@@ -9,6 +9,7 @@ import {
   useWindowSize,
 } from '@edx/paragon';
 
+import { useDispatch } from 'react-redux';
 import ClapsMobile from './assets/claps_280x201.gif';
 import ClapsTablet from './assets/claps_456x328.gif';
 import messages from './messages';
@@ -19,12 +20,13 @@ import { useModel } from '../../../generic/model-store';
 const CelebrationModal = ({
   courseId, intl, isOpen, onClose, ...rest
 }) => {
-  const { org } = useModel('courseHomeMeta', courseId);
+  const { org, celebrations } = useModel('courseHomeMeta', courseId);
+  const dispatch = useDispatch();
   const wideScreen = useWindowSize().width >= breakpoints.small.minWidth;
 
   useEffect(() => {
     if (isOpen) {
-      recordFirstSectionCelebration(org, courseId);
+      recordFirstSectionCelebration(org, courseId, celebrations, dispatch);
     }
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [isOpen]);

src/courseware/course/celebration/utils.jsx

@@ -15,9 +15,20 @@ function handleNextSectionCelebration(sequenceId, nextSequenceId) {
   });
 }
 
-function recordFirstSectionCelebration(org, courseId) {
+function recordFirstSectionCelebration(org, courseId, celebrations, dispatch) {
   // Tell the LMS
   postCelebrationComplete(courseId, { first_section: false });
+  // Update our local copy of course data from LMS
+  dispatch(updateModel({
+    modelType: 'courseHomeMeta',
+    model: {
+      id: courseId,
+      celebrations: {
+        ...celebrations,
+        firstSection: false,
+      },
+    },
+  }));
 
   // Tell our analytics
   const { administrator } = getAuthenticatedUser();

src/courseware/course/celebration/utils.test.jsx

@@ -0,0 +1,15 @@
+import { recordFirstSectionCelebration } from './utils';
+
+jest.mock('@edx/frontend-platform/analytics');
+jest.mock('./data/api');
+jest.mock('@edx/frontend-platform/auth', () => ({
+  getAuthenticatedUser: jest.fn(() => ({ administrator: 'admin' })),
+}));
+
+describe('recordFirstSectionCelebration', () => {
+  it('updates the local copy of the course data from the LMS', async () => {
+    const dispatchMock = jest.fn();
+    recordFirstSectionCelebration('org', 'courseId', 'celebration', dispatchMock);
+    expect(dispatchMock).toHaveBeenCalled();
+  });
+});