Merge branch 'feat/max_concurrency' into 'master'

gateway: add max_concurrency support

See merge request litecord/litecord!82

litecord/blueprints/gateway.py

@@ -51,6 +51,14 @@ async def api_gateway_bot():
         user_id,
     )
 
+    max_concurrency = await app.db.fetchval(
+        """select max_concurrency
+        from users
+        where id = $1
+        """,
+        user_id,
+    )
+
     shards = max(int(guild_count / 1000), 1)
 
     # get _ws.session ratelimit
@@ -78,7 +86,7 @@ async def api_gateway_bot():
                 "total": bucket.requests,
                 "remaining": bucket._tokens,
                 "reset_after": int(reset_after_ts * 1000),
-                "max_concurrency": 1,
+                "max_concurrency": max_concurrency,
             },
         }
     )

litecord/gateway/websocket.py

@@ -791,7 +791,15 @@ class GatewayWebsocket:
         except (Unauthorized, Forbidden):
             raise WebsocketClose(4004, "Authentication failed")
 
-        await self._connect_ratelimit(user_id)
+        max_concurrency = await self.app.db.fetchval(
+            """select max_concurrency
+            from users
+            where id = $1
+            """,
+            user_id,
+        )
+
+        await self._connect_ratelimit(f"{str(user_id)}%{shard[0]%max_concurrency}")
 
         bot = await self.app.db.fetchval(
             """

manage/cmd/migration/scripts/14_max_concurrency.sql

@@ -0,0 +1,3 @@
+alter table users
+    add column max_concurrency int not null default 1
+    check(bot = true or max_concurrency = 1);

manage/cmd/users.py

@@ -94,6 +94,42 @@ async def adduser(ctx, args):
     print(f'\tdiscrim: {user["discriminator"]}')
 
 
+async def set_max_concurrency(ctx, args):
+    """Update the `max_concurrency` for a bot.
+    This can only be set for bot accounts!
+    """
+
+    if int(args.max_concurrency) < 1:
+        return print("max_concurrency must be >0")
+
+    bot = await ctx.db.fetchval(
+        """
+        select bot
+        from users
+        where id = $1
+        """,
+        int(args.user_id),
+    )
+
+    if bot == None:
+        return print("user not found")
+
+    if bot == False:
+        return print("user must be a bot")
+
+    await ctx.db.execute(
+        """
+        update users
+        set max_concurrency = $1
+        where id = $2
+        """,
+        int(args.max_concurrency),
+        int(args.user_id),
+    )
+
+    print(f"OK: set max_concurrency={args.max_concurrency} for {args.user_id}")
+
+
 async def addbot(ctx, args):
     uid, _ = await create_user(args.username, args.email, args.password)
 
@@ -216,6 +252,17 @@ def setup(subparser):
 
     setup_test_parser.set_defaults(func=adduser)
 
+    set_max_concurrency_parser = subparser.add_parser(
+        "set_max_concurrency",
+        help="set `max_concurrency` for a user",
+        description=set_max_concurrency.__doc__,
+    )
+    set_max_concurrency_parser.add_argument("user_id")
+    set_max_concurrency_parser.add_argument(
+        "max_concurrency", help="the `max_concurrency` value to set"
+    )
+    set_max_concurrency_parser.set_defaults(func=set_max_concurrency)
+
     addbot_parser = subparser.add_parser("addbot", help="create a bot")
 
     addbot_parser.add_argument("username", help="username of the bot")