2018-07-01 11:01:24 +08:00
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from collections import namedtuple
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from typing import Dict, Any
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from aiocache import cached
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from aiocqhttp import CQHttp, Error as CQHttpError
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PRIVATE_FRIEND = 0x0001
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PRIVATE_GROUP = 0x0002
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PRIVATE_DISCUSS = 0x0004
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PRIVATE_OTHER = 0x0008
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PRIVATE = 0x000F
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DISCUSS = 0x00F0
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GROUP_MEMBER = 0x0100
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GROUP_ADMIN = 0x0200
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GROUP_OWNER = 0x0400
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GROUP = 0x0F00
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SUPERUSER = 0xF000
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EVERYBODY = 0xFFFF
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IS_NOBODY = 0x0000
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IS_PRIVATE_FRIEND = PRIVATE_FRIEND
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IS_PRIVATE_GROUP = PRIVATE_GROUP
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IS_PRIVATE_DISCUSS = PRIVATE_DISCUSS
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IS_PRIVATE_OTHER = PRIVATE_OTHER
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IS_PRIVATE = PRIVATE
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IS_DISCUSS = DISCUSS
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IS_GROUP_MEMBER = GROUP_MEMBER
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IS_GROUP_ADMIN = GROUP_MEMBER | GROUP_ADMIN
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IS_GROUP_OWNER = GROUP_ADMIN | GROUP_OWNER
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IS_GROUP = GROUP
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IS_SUPERUSER = 0xFFFF
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_min_context_fields = (
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'message_type',
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'sub_type',
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'user_id',
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'discuss_id',
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'group_id',
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'anonymous',
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)
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_MinContext = namedtuple('MinContext', _min_context_fields)
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async def check_permission(bot: CQHttp, ctx: Dict[str, Any],
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permission_required: int) -> bool:
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2018-07-01 20:01:05 +08:00
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"""
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Check if the context has the permission required.
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:param bot: CQHttp instance
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:param ctx: message context
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:param permission_required: permission required
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:return: the context has the permission
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"""
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2018-07-01 11:01:24 +08:00
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min_ctx_kwargs = {}
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for field in _min_context_fields:
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if field in ctx:
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min_ctx_kwargs[field] = ctx[field]
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else:
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min_ctx_kwargs[field] = None
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min_ctx = _MinContext(**min_ctx_kwargs)
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return await _check(bot, min_ctx, permission_required)
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2018-07-01 20:01:05 +08:00
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@cached(ttl=2 * 60) # cache the result for 2 minute
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2018-07-01 11:01:24 +08:00
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async def _check(bot: CQHttp, min_ctx: _MinContext,
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permission_required: int) -> bool:
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permission = 0
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if min_ctx.user_id in bot.config.SUPERUSERS:
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permission |= IS_SUPERUSER
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if min_ctx.message_type == 'private':
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if min_ctx.sub_type == 'friend':
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permission |= IS_PRIVATE_FRIEND
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elif min_ctx.sub_type == 'group':
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permission |= IS_PRIVATE_GROUP
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elif min_ctx.sub_type == 'discuss':
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permission |= IS_PRIVATE_DISCUSS
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elif min_ctx.sub_type == 'other':
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permission |= IS_PRIVATE_OTHER
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elif min_ctx.message_type == 'group':
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permission |= IS_GROUP_MEMBER
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if not min_ctx.anonymous:
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try:
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member_info = await bot.get_group_member_info(
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group_id=min_ctx.group_id,
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user_id=min_ctx.user_id,
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no_cache=True
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)
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if member_info:
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if member_info['role'] == 'owner':
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permission |= IS_GROUP_OWNER
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elif member_info['role'] == 'admin':
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permission |= IS_GROUP_ADMIN
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except CQHttpError:
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pass
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elif min_ctx.message_type == 'discuss':
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permission |= IS_DISCUSS
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return bool(permission & permission_required)
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