displaying bar graph, fetching distributions message

src/shared/messages/CourseDataMessages.ts

@@ -0,0 +1,9 @@
+import { Course } from '../types/Course';
+
+export default interface CourseDataMessages {
+    /**
+     * Gets the distribution of grades for the given course
+     * @returns an array of the number of students in each grade range from A+ to F, with the index of the array corresponding to the grade range
+     */
+    getDistribution: (data: { course: Course }) => number[] | undefined;
+}

src/shared/messages/TabMessages.ts

@@ -1,6 +1,4 @@
 /**
  * This is a type with all the message definitions that can be sent TO specific tabs
  */
-export default interface TAB_MESSAGES {
-    reAnalyzePage: (data: { url: string }) => void;
-}
+export default interface TAB_MESSAGES {}

src/shared/messages/index.ts

@@ -3,18 +3,21 @@ import TAB_MESSAGES from './TabMessages';
 import BrowserActionMessages from './BrowserActionMessages';
 import HotReloadingMessages from './HotReloadingMessages';
 import TabManagementMessages from './TabManagementMessages';
+import CourseDataMessages from './CourseDataMessages';
 
 /**
  * This is a type with all the message definitions that can be sent TO the background script
  */
-export type BACKGROUND_MESSAGES = BrowserActionMessages & TabManagementMessages & HotReloadingMessages;
+export type BACKGROUND_MESSAGES = BrowserActionMessages &
+    TabManagementMessages &
+    HotReloadingMessages &
+    CourseDataMessages;
 
 /**
  * A utility object that can be used to send type-safe messages to the background script
  */
 export const bMessenger = createMessenger<BACKGROUND_MESSAGES>('background');
 
-
 /**
  * A utility object that can be used to send type-safe messages to specific tabs
  */