Bridge changes to permissions from Telegram

CHANGELOG.md

@@ -11,6 +11,7 @@
 ### Improved
 * Redacting reactions on Matrix no longer removes the user's other reactions to
   the same message (premium users can have up to 3 reactions per message).
+* Changes to default user permissions on Telegram are now bridged.
 
 ### Fixed
 

mautrix_telegram/abstract_user.py

@@ -41,6 +41,7 @@ from telethon.tl.types import (
     TypeUpdate,
     UpdateChannel,
     UpdateChannelUserTyping,
+    UpdateChatDefaultBannedRights,
     UpdateChatParticipantAdmin,
     UpdateChatParticipants,
     UpdateChatUserTyping,
@@ -346,6 +347,8 @@ class AbstractUser(ABC):
             await self.update_admin(update)
         elif isinstance(update, UpdateChatParticipants):
             await self.update_participants(update)
+        elif isinstance(update, UpdateChatDefaultBannedRights):
+            await self.update_default_banned_rights(update)
         elif isinstance(update, (UpdatePinnedMessages, UpdatePinnedChannelMessages)):
             await self.update_pinned_messages(update)
         elif isinstance(update, (UpdateUserName, UpdateUserPhoto)):
@@ -392,6 +395,12 @@ class AbstractUser(ABC):
         if portal and portal.mxid:
             await portal.update_power_levels(update.participants.participants)
 
+    @staticmethod
+    async def update_default_banned_rights(update: UpdateChatDefaultBannedRights) -> None:
+        portal = await po.Portal.get_by_entity(update.peer)
+        if portal and portal.mxid:
+            await portal.update_default_banned_rights(update.default_banned_rights)
+
     async def update_read_receipt(self, update: UpdateReadHistoryOutbox) -> None:
         if not isinstance(update.peer, PeerUser):
             self.log.debug("Unexpected read receipt peer: %s", update.peer)

mautrix_telegram/portal.py

@@ -65,6 +65,7 @@ from telethon.tl.types import (
     Channel,
     ChannelFull,
     Chat,
+    ChatBannedRights,
     ChatFull,
     ChatPhoto,
     ChatPhotoEmpty,
@@ -994,6 +995,12 @@ class Portal(DBPortal, BasePortal):
         if await putil.participants_to_power_levels(self, users, levels):
             await self.main_intent.set_power_levels(self.mxid, levels)
 
+    async def update_default_banned_rights(self, dbr: ChatBannedRights) -> None:
+        self.log.debug("Default rights in chat changed: %s", dbr)
+        levels = await self.main_intent.get_power_levels(self.mxid)
+        levels = putil.get_base_power_levels(self, levels, dbr=dbr)
+        await self.main_intent.set_power_levels(self.mxid, levels)
+
     async def _add_bot_chat(self, bot: User) -> None:
         if self.bot and bot.id == self.bot.tgid:
             await self.bot.add_chat(self.tgid, self.peer_type)

mautrix_telegram/portal_util/power_levels.py

@@ -34,8 +34,12 @@ from ..types import TelegramID
 
 
 def get_base_power_levels(
-    portal: po.Portal, levels: PowerLevelContent = None, entity: TypeChat = None
+    portal: po.Portal,
+    levels: PowerLevelContent = None,
+    entity: TypeChat | None = None,
+    dbr: ChatBannedRights | None = None,
 ) -> PowerLevelContent:
+    is_initial = not levels
     levels = levels or PowerLevelContent()
     if portal.peer_type == "user":
         overrides = portal.config["bridge.initial_power_level_overrides.user"]
@@ -51,7 +55,7 @@ def get_base_power_levels(
         levels.events_default = overrides.get("events_default", 0)
     else:
         overrides = portal.config["bridge.initial_power_level_overrides.group"]
-        dbr = entity.default_banned_rights
+        dbr = dbr or entity.default_banned_rights
         if not dbr:
             portal.log.debug(f"default_banned_rights is None in {entity}")
             dbr = ChatBannedRights(
@@ -80,16 +84,14 @@ def get_base_power_levels(
         levels.events_default = overrides.get(
             "events_default",
             50
-            if portal.peer_type == "channel" and not entity.megagroup or dbr.send_messages
+            if portal.peer_type == "channel" and not portal.megagroup or dbr.send_messages
             else 0,
         )
     for evt_type, value in overrides.get("events", {}).items():
         levels.events[EventType.find(evt_type)] = value
     userlevel_overrides = overrides.get("users", {})
-    bot_level = levels.get_user_level(portal.main_intent.mxid)
+    if is_initial:
-    for user, user_level in levels.users.items():
+        levels.users.update(userlevel_overrides)
-        if user_level < bot_level:
-            levels.users[user] = userlevel_overrides.get(user, 0)
     if portal.main_intent.mxid not in levels.users:
         levels.users[portal.main_intent.mxid] = 100
     return levels