Initial attempt at removing appservice bot power level requirements

mautrix_telegram/commands/portal.py

@@ -128,11 +128,6 @@ async def bridge(evt: CommandEvent):
     if not await _has_access_to(room_id, evt.az.intent, evt.sender, "bridge"):
         return await evt.reply("You do not have the permissions to bridge that room.")
 
-    levels = await evt.az.intent.get_power_levels(room_id)
-    power_level_error = _check_power_levels(levels, evt.az.bot_mxid)
-    if power_level_error:
-        return await evt.reply(power_level_error)
-
     # The /id bot command provides the prefixed ID, so we assume
     tgid = evt.args[0]
     if tgid.startswith("-100"):
@@ -258,21 +253,6 @@ async def _get_initial_state(evt: CommandEvent):
     return title, about, levels
 
 
-def _check_power_levels(levels: dict, bot_mxid: str):
-    try:
-        if levels["users"][bot_mxid] < 100:
-            raise ValueError()
-    except (TypeError, KeyError, ValueError):
-        return (f"Please give [the bridge bot](https://matrix.to/#/{bot_mxid}) a power level of "
-                "100 before creating or bridging a Telegram chat.")
-
-    for user, level in levels["users"].items():
-        if level >= 100 and user != bot_mxid:
-            return (f"Please make sure only the bridge bot has power level above 99 before "
-                    f"creating or bridging a Telegram chat.\n\n"
-                    f"Use power level 95 instead of 100 for admins.")
-
-
 @command_handler()
 async def create(evt: CommandEvent):
     type = evt.args[0] if len(evt.args) > 0 else "group"
@@ -287,10 +267,6 @@ async def create(evt: CommandEvent):
     if not title:
         return await evt.reply("Please set a title before creating a Telegram chat.")
 
-    power_level_error = _check_power_levels(levels, evt.az.bot_mxid)
-    if power_level_error:
-        return await evt.reply(power_level_error)
-
     supergroup = type == "supergroup"
     type = {
         "supergroup": "channel",

mautrix_telegram/portal.py

@@ -284,6 +284,8 @@ class Portal:
             levels["users"] = {
                 self.main_intent.mxid: 100
             }
+        else:
+            levels["users"][self.main_intent.mxid] = 100
         return levels
 
     @property
@@ -799,7 +801,8 @@ class Portal:
             self.bot.add_chat(self.tgid, self.peer_type)
 
         levels = await self.main_intent.get_power_levels(self.mxid)
-        levels = self._get_base_power_levels(levels, entity)
+        if self._get_bot_level(levels) == 100:
+            levels = self._get_base_power_levels(levels, entity)
         already_saved = await self.handle_matrix_power_levels(source, levels["users"], {})
         if not already_saved:
             await self.main_intent.set_power_levels(self.mxid, levels)
@@ -1060,18 +1063,29 @@ class Portal:
         return 0
 
     @staticmethod
-    def _participant_to_power_levels(levels, user, new_level):
+    def _participant_to_power_levels(levels, user, new_level, bot_level):
+        new_level = min(new_level, bot_level)
         user_level_defined = user.mxid in levels["users"]
-        user_has_right_level = (levels["users"][user.mxid] == new_level
-                                if user_level_defined else new_level == 0)
-        if not user_has_right_level:
+        default_level = levels["users_default"] if "users_default" in levels else 0
+        user_level = levels["users"][user.mxid] if user_level_defined else default_level
+        if user_level != new_level and user_level < bot_level:
             levels["users"][user.mxid] = new_level
             return True
         return False
 
+    def _get_bot_level(self, levels):
+        try:
+            return levels["users"][self.main_intent.mxid]
+        except KeyError:
+            try:
+                return levels["users_default"]
+            except KeyError:
+                return 0
+
     def _participants_to_power_levels(self, participants, levels):
+        bot_level = self._get_bot_level(levels)
         changed = False
-        admin_power_level = 75 if self.peer_type == "channel" else 50
+        admin_power_level = min(75 if self.peer_type == "channel" else 50, bot_level)
         if levels["events"]["m.room.power_levels"] != admin_power_level:
             changed = True
             levels["events"]["m.room.power_levels"] = admin_power_level
@@ -1083,10 +1097,12 @@ class Portal:
 
             if user:
                 user.register_portal(self)
-                changed = self._participant_to_power_levels(levels, user, new_level) or changed
+                changed = self._participant_to_power_levels(levels, user, new_level,
+                                                            bot_level) or changed
 
             if puppet:
-                changed = self._participant_to_power_levels(levels, puppet, new_level) or changed
+                changed = self._participant_to_power_levels(levels, puppet, new_level,
+                                                            bot_level) or changed
         return changed
 
     async def update_telegram_participants(self, participants, levels=None):
@@ -1101,7 +1117,10 @@ class Portal:
         levels["invite"] = level
         levels["events"]["m.room.name"] = level
         levels["events"]["m.room.avatar"] = level
-        await self.main_intent.set_power_levels(self.mxid, levels)
+        try:
+            await self.main_intent.set_power_levels(self.mxid, levels)
+        except MatrixRequestError:
+            pass
 
     # endregion
     # region Database conversion