feat: gate chat visibility by course end date

src/courseware/course/Course.jsx

@@ -91,6 +91,7 @@ const Course = ({
               courseId={courseId}
               contentToolsEnabled={course.showCalculator || course.notes.enabled}
               unitId={unitId}
+              endDate={course.end ? course.end : ''}
             />
             {enableNewSidebar === 'true' ? <NewSidebarTriggers /> : <SidebarTriggers /> }
           </>

src/courseware/course/chat/Chat.jsx

@@ -11,6 +11,7 @@ const Chat = ({
   courseId,
   contentToolsEnabled,
   unitId,
+  endDate,
 }) => {
   const VERIFIED_MODES = [
     'professional',
@@ -36,9 +37,17 @@ const Chat = ({
     && [...VERIFIED_MODES, ...AUDIT_MODES].some(mode => mode === enrollmentMode)
   );
 
+  const endDatePassed = () => {
+    const date = new Date();
+    const utcDate = date.toISOString();
+
+    return endDate ? utcDate > endDate : false; // evaluate if end date has passed only if course has end date
+  };
+
   const shouldDisplayChat = (
     enabled
     && (isEnrolled || isStaff) // display only to enrolled or staff
+    && !endDatePassed()
   );
 
   return (
@@ -59,6 +68,7 @@ Chat.propTypes = {
   courseId: PropTypes.string.isRequired,
   contentToolsEnabled: PropTypes.bool.isRequired,
   unitId: PropTypes.string.isRequired,
+  endDate: PropTypes.string.isRequired,
 };
 
 Chat.defaultProps = {

src/courseware/course/chat/Chat.test.jsx

@@ -19,6 +19,7 @@ const enabledModes = [
   'paid-executive-education', 'paid-bootcamp', 'audit', 'honor', 'unpaid-executive-education', 'unpaid-bootcamp',
 ];
 const disabledModes = [null, undefined, 'xyz'];
+const currentTime = new Date();
 
 describe('Chat', () => {
   // Generate test cases.
@@ -44,6 +45,7 @@ describe('Chat', () => {
               enabled
               courseId={courseId}
               contentToolsEnabled={false}
+              endDate={new Date(currentTime.getTime() + 10 * 60000).toISOString()}
             />
           </BrowserRouter>,
           { store },
@@ -77,6 +79,7 @@ describe('Chat', () => {
             enabled
             courseId={courseId}
             contentToolsEnabled={false}
+            endDate={new Date(currentTime.getTime() + 10 * 60000).toISOString()}
           />
         </BrowserRouter>,
         { store },
@@ -138,6 +141,7 @@ describe('Chat', () => {
               enabled={test.enabled}
               courseId={courseId}
               contentToolsEnabled={false}
+              endDate={new Date(currentTime.getTime() + 10 * 60000).toISOString()}
             />
           </BrowserRouter>,
           { store },
@@ -152,4 +156,54 @@ describe('Chat', () => {
       },
     );
   });
+
+  it('if course end date has passed, component should not be visible', async () => {
+    const store = configureStore({
+      reducer: {
+        learningAssistant: learningAssistantReducer,
+      },
+    });
+
+    render(
+      <BrowserRouter>
+        <Chat
+          enrollmentMode="verified"
+          isStaff
+          enabled
+          courseId={courseId}
+          contentToolsEnabled={false}
+          endDate={new Date(currentTime.getTime() - 10 * 60000).toISOString()}
+        />
+      </BrowserRouter>,
+      { store },
+    );
+
+    const chat = screen.queryByTestId('toggle-button');
+    expect(chat).not.toBeInTheDocument();
+  });
+
+  it('if course has no end date, component should be visible', async () => {
+    const store = configureStore({
+      reducer: {
+        learningAssistant: learningAssistantReducer,
+      },
+    });
+
+    render(
+      <BrowserRouter>
+        <Chat
+          enrollmentMode="verified"
+          isStaff
+          enabled
+          courseId={courseId}
+          contentToolsEnabled={false}
+          endDate={null}
+        />
+      </BrowserRouter>,
+      { store },
+    );
+
+    const chat = screen.queryByTestId('toggle-button');
+    expect(chat).toBeInTheDocument();
+  });
 });