feat(messenger): SENT/READ status on thread chats + mark-read helper

src/api/friends/MessengerThread.test.ts

@@ -0,0 +1,26 @@
+import { describe, expect, it } from 'vitest';
+import { MessengerFriend } from './MessengerFriend';
+import { MessengerThread } from './MessengerThread';
+import { MessengerThreadChat } from './MessengerThreadChat';
+
+const makeThread = (participantId: number): MessengerThread =>
+{
+    const friend = new MessengerFriend();
+    friend.id = participantId;
+    return new MessengerThread(friend);
+};
+
+describe('MessengerThread.setMessagesReadFromUser', () =>
+{
+    it('marks only the given user\'s messages as READ', () =>
+    {
+        const thread = makeThread(7);
+        const mine = thread.addMessage(100, 'a', 0, null, MessengerThreadChat.CHAT);
+        const theirs = thread.addMessage(7, 'b', 0, null, MessengerThreadChat.CHAT);
+
+        thread.setMessagesReadFromUser(100);
+
+        expect(mine.status).toBe(MessengerThreadChat.READ);
+        expect(theirs.status).toBe(MessengerThreadChat.SENT);
+    });
+});