Add permission

none/helpers.py

@@ -1,4 +1,6 @@
-from typing import Dict, Any
+from typing import Dict, Any, Union, List
+
+from aiocqhttp import CQHttp, Error as CQHttpError
 
 
 def context_source(ctx: Dict[str, Any]) -> str:
@@ -10,3 +12,13 @@ def context_source(ctx: Dict[str, Any]) -> str:
     if ctx.get('user_id'):
         src += 'p%s' % ctx['user_id']
     return src
+
+
+async def send(bot: CQHttp, ctx: Dict[str, Any],
+               message: Union[str, Dict[str, Any], List[Dict[str, Any]]],
+               *, ignore_failure: bool = True) -> None:
+    try:
+        await bot.send(ctx, message)
+    except CQHttpError:
+        if not ignore_failure:
+            raise