Initial commit: Angular frontend and Expressjs backend

worklenz-backend/src/socket.io/commands/on-task-subscriber-change.ts

@@ -0,0 +1,37 @@
+import {Server, Socket} from "socket.io";
+import db from "../../config/db";
+import {SocketEvents} from "../events";
+
+import {log_error} from "../util";
+import TasksControllerV2 from "../../controllers/tasks-controller-v2";
+
+interface ITaskSubscribeRequest {
+  mode: number;
+  task_id: string;
+  user_id: string;
+  team_member_id: string;
+}
+
+export async function on_task_subscriber_change(_io: Server, socket: Socket, data?: ITaskSubscribeRequest) {
+  if (!data) return;
+
+  try {
+    const isSubscribe = data.mode == 0;
+    const q = isSubscribe
+      ? `INSERT INTO task_subscribers (user_id, task_id, team_member_id, action)
+         VALUES ($1, $2, $3, 'WHEN_DONE');`
+      : `DELETE
+         FROM task_subscribers
+         WHERE user_id = $1
+           AND task_id = $2
+           AND team_member_id = $3;`;
+    await db.query(q, [data.user_id, data.task_id, data.team_member_id]);
+
+    const subscribers = await TasksControllerV2.getTaskSubscribers(data.task_id);
+    socket.emit(SocketEvents.TASK_SUBSCRIBERS_CHANGE.toString(), subscribers);
+
+    return;
+  } catch (error) {
+    log_error(error);
+  }
+}