feat: submission celebration, extension guardrails, and Unit Hub rework

src/app/api/models/notification.ts

@@ -4,9 +4,10 @@ import {Entity} from 'ngx-entity-service';
  * Something that happened which the signed in user should be told about.
  *
  * `notificationType` is the category the user's preferences switch on, one of
- * task, feedback, portfolio, extension or general. The api gates delivery on
- * the first three against the receive_*_notifications columns, so the web app
- * never has to check a preference before rendering one of these.
+ * task, feedback, portfolio, extension, general or unit_hub. The api gates
+ * delivery on task, feedback, portfolio and unit_hub against the
+ * receive_*_notifications columns, so the web app never has to check a
+ * preference before rendering one of these.
  *
  * `event` is the stable, specific hook (for example `task_comment_created`).
  * Presentation can vary by event without inferring meaning from message text.
@@ -42,6 +43,13 @@ export class Notification extends Entity {
   commentId?: number | null;
   groupId?: number | null;
 
+  /**
+   * The Unit Hub announcement or session a unit_hub notification is about.
+   * Null once it has been deleted, undefined from an api that predates them.
+   */
+  announcementId?: number | null;
+  sessionId?: number | null;
+
   /**
    * When the user read this, or null while it is still unread.
    */

src/app/api/models/task-comment/task-comment.ts

@@ -22,6 +22,12 @@ export class TaskComment extends Entity {
   recipientReadTime: string;
   commentType: string = 'text';
   isNew: boolean;
+  /**
+   * True when OnTrack wrote this comment rather than a person. It is stored
+   * against the tutor for the task, because a comment needs an author, so
+   * without this it reads as something that tutor said.
+   */
+  automated = false;
   replyToId: number;
   attachmentFileName?: string;
   attachmentMimeType?: string;