141 lines
5.8 KiB
Python
141 lines
5.8 KiB
Python
import asyncio
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import rethinkdb as r
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from discord.ext import commands
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import discord
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from . import config
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from . import utilities
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loop = asyncio.get_event_loop()
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def should_ignore(ctx):
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if ctx.message.guild is None:
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return False
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ignored = ctx.bot.cache.ignored[ctx.guild.id]
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if not ignored:
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return False
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return ctx.message.author.id in ignored['members'] or ctx.message.channel.id in ignored['channels']
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async def check_not_restricted(ctx):
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# Return true if this is a private channel, we'll handle that in the registering of the command
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if type(ctx.message.channel) is discord.DMChannel:
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return True
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# First get all the restrictions
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restrictions = ctx.bot.cache.restrictions[ctx.guild.id]
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# Now lets check the "from" restrictions
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for from_restriction in restrictions.get('from', []):
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# Get the source and destination
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# Source should ALWAYS be a command in this case
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source = from_restriction.get('source')
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destination = from_restriction.get('destination')
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# Special check for what the "disable" command produces
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if destination == "everyone" and ctx.command.qualified_name == source:
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return False
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# Convert destination to the object we want
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destination = await utilities.convert(ctx, destination)
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# If we couldn't find the destination, just continue with other restrictions
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# Also if this restriction we're checking isn't for this command
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if destination is None or source != ctx.command.qualified_name:
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continue
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# This means that the type of restriction we have is `command from channel`
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# Which means we do not want commands to be ran in this channel
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if destination == ctx.message.channel:
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return False
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# This type is `command from Role` meaning anyone with this role can't run this command
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elif destination in ctx.message.author.roles:
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return False
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# This is `command from Member` meaning this user specifically cannot run this command
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elif destination == ctx.message.author:
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return False
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# If we are here, then there are no blacklists stopping this from running
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# Now for the to restrictions this is a little different, we need to make a whitelist and
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# see if our current channel is in this whitelist, as well as any whitelisted roles are in the author's roles
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# Only if there is no whitelist, do we want to blanket return True
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to_restrictions = restrictions.get('to', [])
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if len(to_restrictions) == 0:
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return True
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# Otherwise there is a whitelist, and we need to start it
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whitelisted_channels = []
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whitelisted_roles = []
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for to_restriction in to_restrictions:
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# Get the source and destination
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# Source should ALWAYS be a command in this case
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source = to_restriction.get('source')
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destination = to_restriction.get('destination')
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# Convert destination to the object we want
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destination = await utilities.convert(ctx, destination)
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# If we couldn't find the destination, just continue with other restrictions
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# Also if this restriction we're checking isn't for this command
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if destination is None or source != ctx.command.qualified_name:
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continue
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# Append to our two whitelists depending on what type this is
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if isinstance(destination, discord.TextChannel):
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whitelisted_channels.append(destination)
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elif isinstance(destination, discord.Role):
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whitelisted_roles.append(destination)
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if whitelisted_channels:
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if ctx.channel not in whitelisted_channels:
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return False
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if whitelisted_roles:
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if not any(x in ctx.message.author.roles for x in whitelisted_roles):
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return False
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# If we have passed all of these, then we are allowed to run this command
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# This looks like a whole lot, but all of these lists will be very tiny in almost all cases
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# And only delving deep into the specific lists that may be large, will we finally see "large" lists
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# Which means this still will not be slow in other cases
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return True
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def has_perms(ctx, **perms):
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# Return true if this is a private channel, we'll handle that in the registering of the command
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if type(ctx.message.channel) is discord.DMChannel:
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return True
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# Get the member permissions so that we can compare
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guild_perms = ctx.message.author.guild_permissions
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channel_perms = ctx.message.author.permissions_in(ctx.message.channel)
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# Currently the library doesn't handle administrator overrides..so lets do this manually
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if guild_perms.administrator:
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return True
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# Next, set the default permissions if one is not used, based on what was passed
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# This will be overriden later, if we have custom permissions
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required_perm = discord.Permissions.none()
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for perm, setting in perms.items():
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setattr(required_perm, perm, setting)
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required_perm_value = ctx.bot.cache.custom_permissions[ctx.guild.id].get(ctx.command.qualified_name)
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if required_perm_value:
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required_perm = discord.Permissions(required_perm_value)
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# Now just check if the person running the command has these permissions
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return guild_perms >= required_perm or channel_perms >= required_perm
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def can_run(**kwargs):
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async def predicate(ctx):
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# Next check if it requires any certain permissions
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if kwargs and not has_perms(ctx, **kwargs):
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return False
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# Next...check custom restrictions
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if not await check_not_restricted(ctx):
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return False
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# Then if the user/channel should be ignored
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if should_ignore(ctx):
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return False
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# Otherwise....we're good
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return True
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predicate.perms = kwargs
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return commands.check(predicate)
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