Prevent duplicate push notifications for room reads (#11835)

1 files changed, 6 insertions, 1 deletions

diff --git a/synapse/push/httppusher.py b/synapse/push/httppusher.py

index 96559081d0..49bcc06e0b 100644
--- a/synapse/push/httppusher.py
+++ b/synapse/push/httppusher.py
@@ -109,6 +109,7 @@ class HttpPusher(Pusher):
         self.data_minus_url = {}
         self.data_minus_url.update(self.data)
         del self.data_minus_url["url"]
+        self.badge_count_last_call: Optional[int] = None
 
     def on_started(self, should_check_for_notifs: bool) -> None:
         """Called when this pusher has been started.
@@ -136,7 +137,9 @@ class HttpPusher(Pusher):
             self.user_id,
             group_by_room=self._group_unread_count_by_room,
         )
-        await self._send_badge(badge)
+        if self.badge_count_last_call is None or self.badge_count_last_call != badge:
+            self.badge_count_last_call = badge
+            await self._send_badge(badge)
 
     def on_timer(self) -> None:
         self._start_processing()
@@ -402,6 +405,8 @@ class HttpPusher(Pusher):
         rejected = []
         if "rejected" in resp:
             rejected = resp["rejected"]
+        else:
+            self.badge_count_last_call = badge
         return rejected
 
     async def _send_badge(self, badge: int) -> None: