Notifications refactor (#5151

* Ongoing

* refactor

* test

* Add cleanup task

* refactor

server/queues/tasks/CommentUpdatedNotificationsTask.ts

@@ -0,0 +1,57 @@
+import { NotificationEventType } from "@shared/types";
+import { Comment, Document, Notification, User } from "@server/models";
+import ProsemirrorHelper from "@server/models/helpers/ProsemirrorHelper";
+import { CommentEvent, CommentUpdateEvent } from "@server/types";
+import BaseTask, { TaskPriority } from "./BaseTask";
+
+export default class CommentUpdatedNotificationsTask extends BaseTask<
+  CommentEvent
+> {
+  public async perform(event: CommentUpdateEvent) {
+    const [document, comment] = await Promise.all([
+      Document.scope("withCollection").findOne({
+        where: {
+          id: event.documentId,
+        },
+      }),
+      Comment.findByPk(event.modelId),
+    ]);
+    if (!document || !comment) {
+      return;
+    }
+
+    const mentions = ProsemirrorHelper.parseMentions(
+      ProsemirrorHelper.toProsemirror(comment.data)
+    ).filter((mention) => event.data.newMentionIds.includes(mention.id));
+    if (mentions.length === 0) {
+      return;
+    }
+
+    for (const mention of mentions) {
+      const recipient = await User.findByPk(mention.modelId);
+
+      if (
+        recipient &&
+        recipient.id !== mention.actorId &&
+        recipient.subscribedToEventType(
+          NotificationEventType.MentionedInComment
+        )
+      ) {
+        await Notification.create({
+          event: NotificationEventType.MentionedInComment,
+          userId: recipient.id,
+          actorId: mention.actorId,
+          teamId: document.teamId,
+          documentId: document.id,
+        });
+      }
+    }
+  }
+
+  public get options() {
+    return {
+      attempts: 1,
+      priority: TaskPriority.Background,
+    };
+  }
+}