Improve command experience

none/command/__init__.py

@@ -263,6 +263,10 @@ def _new_command_session(bot: CQHttp,
     :param ctx: message context
     :return: CommandSession object or None
     """
+    if not ctx['to_me']:
+        # TODO: 支持不需要 at 的命令
+        return None
+
     msg_text = str(ctx['message']).lstrip()
 
     for start in bot.config.COMMAND_START:

none/message.py

@@ -5,22 +5,31 @@ from aiocqhttp.message import MessageSegment
 
 from .command import handle_command
 from .log import logger
+from .helpers import send
 
 
 async def handle_message(bot: CQHttp, ctx: Dict[str, Any]) -> None:
     # TODO: 支持让插件自己选择是否响应没有 at 的消息
     if ctx['message_type'] != 'private':
         # group or discuss
-        first_message_seg = ctx['message'][0]
-        if first_message_seg != MessageSegment.at(ctx['self_id']):
-            return
-        del ctx['message'][0]
+        ctx['to_me'] = False
+        indexes_to_remove = []
+        for i, seg in enumerate(ctx['message']):
+            if seg == MessageSegment.at(ctx['self_id']):
+                ctx['to_me'] = True
+                indexes_to_remove.append(i)
+        for i in reversed(indexes_to_remove):
+            del ctx['message'][i]
         if not ctx['message']:
             ctx['message'].append(MessageSegment.text(''))
+    else:
+        ctx['to_me'] = True
 
     handled = await handle_command(bot, ctx)
     if handled:
         logger.debug('Message is handled as a command')
         return
-    else:
-        await bot.send(ctx, '你在说什么我看不懂诶')
+    elif ctx['to_me']:
+        await send(bot, ctx, '你在说什么我看不懂诶')
+
+    # TODO: NLP