[FIX] mail: channel notification messages are never marked as unread

When a user either joins and leaves a channel, it posts a message of
type 'notification' with either action as content.

Before this commit, such messages above were incrementing the unread
counter of the channel. As a result, the messaging menu was showing
this channel as unread with this message.

Messages of type 'notification' should never increment the unread
counter of channel.

This commit fixes the issue by preventing new messages of type
'notification' to increment the unread counter of a conversation.
This should also prevent increasing the counter of the messaging
menu, in addition to highlighting this channel as unread from the
messaging menu.

Task-Id 2059515

closes odoo/odoo#36293

Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/addons/mail/static/src/js/models/threads/searchable_thread.js b/addons/mail/static/src/js/models/threads/searchable_thread.js
index 511bc6348c8..2b9d64b2597 100644
--- a/addons/mail/static/src/js/models/threads/searchable_thread.js
+++ b/addons/mail/static/src/js/models/threads/searchable_thread.js
@@ -148,7 +148,11 @@ var SearchableThread = Thread.extend({
         if (cache.messages[index] !== message) {
             cache.messages.splice(index, 0, message);
         }
-        if (!message.isMyselfAuthor() && options.incrementUnread) {
+        if (
+            !message.isMyselfAuthor() &&
+            options.incrementUnread &&
+            message.getType() !== 'notification'
+        ) {
             this._incrementUnreadCounter();
         }
     },