Ignore ack and notification counts if notifications are blocked by the device (#27570)

* Ignore performance counts if notifications are blocked by the device

* Change the endpoint to allow more information

* Add tests and API description

* Remove wrong test

* Address feedback

* Only update the cache when there is no error

* Follow same casing as other props

* use one single endpoint

* Fix tests

* Fix i18n

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

server/channels/api4/system.go

@@ -674,7 +674,19 @@ func pushNotificationAck(c *Context, w http.ResponseWriter, r *http.Request) {
 	}
 
 	if ack.NotificationType == model.PushTypeMessage {
-		c.App.CountNotificationAck(model.NotificationTypePush, ack.ClientPlatform)
+		session := c.AppContext.Session()
+		ignoreNotificationACK := session.Props[model.SessionPropDeviceNotificationDisabled] == "true"
+		if ignoreNotificationACK && ack.ClientPlatform == "ios" {
+			// iOS doesn't send ack when the notificications are disabled
+			// so we restore the value the moment we receive an ack
+			c.App.SetExtraSessionProps(session, map[string]string{
+				model.SessionPropDeviceNotificationDisabled: "false",
+			})
+			c.App.ClearSessionCacheForUser(session.UserId)
+		}
+		if !ignoreNotificationACK {
+			c.App.CountNotificationAck(model.NotificationTypePush, ack.ClientPlatform)
+		}
 	}
 
 	err := c.App.SendAckToPushProxy(&ack)