From 15e7580119900fddf0470020c245f36b136de3f1 Mon Sep 17 00:00:00 2001
From: Zita Szupera <szuperaz@gmail.com>
Date: Thu, 29 Aug 2024 14:01:07 +0200
Subject: [PATCH] Revert "fix: unread indicator logic"

This reverts commit 0a29d99ae61241ed1d055eedc65ed7472cde107c.
---
 .../src/lib/channel.service.spec.ts           | 28 -------------------
 .../src/lib/channel.service.ts                |  8 ++----
 2 files changed, 2 insertions(+), 34 deletions(-)

diff --git a/projects/stream-chat-angular/src/lib/channel.service.spec.ts b/projects/stream-chat-angular/src/lib/channel.service.spec.ts
index 10c20d43..ce6dcb5d 100644
--- a/projects/stream-chat-angular/src/lib/channel.service.spec.ts
+++ b/projects/stream-chat-angular/src/lib/channel.service.spec.ts
@@ -2328,22 +2328,6 @@ describe('ChannelService', () => {
     expect(service.activeChannelUnreadCount).toBe(0);
   });
 
-  it(`should set last read message id to undefined if unread count is 0`, () => {
-    const activeChannel = generateMockChannels()[0];
-    activeChannel.id = 'next-active-channel';
-    activeChannel.state.read[user.id] = {
-      last_read: new Date(),
-      last_read_message_id: 'last-read-message-id',
-      unread_messages: 0,
-      user: user,
-    };
-
-    service.setAsActiveChannel(activeChannel);
-
-    expect(service.activeChannelLastReadMessageId).toBe(undefined);
-    expect(service.activeChannelUnreadCount).toBe(0);
-  });
-
   it('should be able to select empty channel as active channel', () => {
     const channel = generateMockChannels()[0];
     channel.id = 'new-empty-channel';
@@ -2548,18 +2532,6 @@ describe('ChannelService', () => {
 
     expect(service.activeChannelLastReadMessageId).toBe('last-read-message');
     expect(service.activeChannelUnreadCount).toBe(12);
-
-    events$.next({
-      eventType: 'notification.mark_unread',
-      event: {
-        channel_id: service.activeChannel?.id,
-        unread_messages: 0,
-        last_read_message_id: 'last-read-message',
-      } as Event<DefaultStreamChatGenerics>,
-    });
-
-    expect(service.activeChannelLastReadMessageId).toBe(undefined);
-    expect(service.activeChannelUnreadCount).toBe(0);
   });
 
   it('should halt marking the channel as read if an unread call was made in that session', async () => {
diff --git a/projects/stream-chat-angular/src/lib/channel.service.ts b/projects/stream-chat-angular/src/lib/channel.service.ts
index 32fede50..1f47d21b 100644
--- a/projects/stream-chat-angular/src/lib/channel.service.ts
+++ b/projects/stream-chat-angular/src/lib/channel.service.ts
@@ -557,14 +557,13 @@ export class ChannelService<
     const readState =
       channel.state.read[this.chatClientService.chatClient.user?.id || ''];
     this.activeChannelLastReadMessageId = readState?.last_read_message_id;
-    this.activeChannelUnreadCount = readState?.unread_messages || 0;
     if (
       channel.state.latestMessages[channel.state.latestMessages.length - 1]
-        ?.id === this.activeChannelLastReadMessageId ||
-      this.activeChannelUnreadCount === 0
+        ?.id === this.activeChannelLastReadMessageId
     ) {
       this.activeChannelLastReadMessageId = undefined;
     }
+    this.activeChannelUnreadCount = readState?.unread_messages || 0;
     this.watchForActiveChannelEvents(channel);
     this.addChannel(channel);
     this.activeChannelSubject.next(channel);
@@ -1514,9 +1513,6 @@ export class ChannelService<
           this.ngZone.run(() => {
             this.activeChannelLastReadMessageId = e.last_read_message_id;
             this.activeChannelUnreadCount = e.unread_messages;
-            if (this.activeChannelUnreadCount === 0) {
-              this.activeChannelLastReadMessageId = undefined;
-            }
             this.activeChannelSubject.next(this.activeChannel);
           });
         })