mirror of
https://github.com/Cog-Creators/Red-DiscordBot.git
synced 2025-11-06 03:08:55 -05:00
3d6020b9cf
* basic caching layer * bit more work, now with an upper size to the cache * cache fix * smarter cache invalidation * One more cache case * Put in a bare skeleton of something else still needed * more logic handling improvements * more work, still not finished * mass-resolve is done in theory, but needs testing * small bugfixin + comments * add note about before/after hooks * LRU-dict fix * when making comments about optimizations, provide historical context * fmt pass
683 lines
25 KiB
Python
683 lines
25 KiB
Python
from copy import copy
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import contextlib
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import asyncio
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import discord
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from redbot.core import commands
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from redbot.core.bot import Red
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from redbot.core import checks
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from redbot.core.config import Config
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from redbot.core.i18n import Translator, cog_i18n
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from redbot.core.utils.caching import LRUDict
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from .resolvers import val_if_check_is_valid, resolve_models, entries_from_ctx
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from .yaml_handler import yamlset_acl, yamlget_acl
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from .converters import CogOrCommand, RuleType
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from .mass_resolution import mass_resolve
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_models = ["owner", "guildowner", "admin", "mod", "all"]
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_ = Translator("Permissions", __file__)
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REACTS = {"\N{WHITE HEAVY CHECK MARK}": True, "\N{NEGATIVE SQUARED CROSS MARK}": False}
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Y_OR_N = {"y": True, "yes": True, "n": False, "no": False}
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@cog_i18n(_)
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class Permissions:
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"""
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A high level permission model
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"""
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# Not sure if we will use admin or mod models in core red
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# but they are explicitly supported
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resolution_order = {k: _models[:i] for i, k in enumerate(_models, 1)}
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def __init__(self, bot: Red):
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self.bot = bot
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self.config = Config.get_conf(self, identifier=78631113035100160, force_registration=True)
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self.config.register_global(owner_models={})
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self.config.register_guild(owner_models={})
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self.cache = LRUDict(size=25000) # This can be tuned later
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async def get_user_ctx_overrides(self, ctx: commands.Context) -> dict:
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"""
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This takes a context object, and returns a dict of
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allowed: list of commands
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denied: list of commands
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default: list of commands
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representing how permissions interacts with the
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user, channel, guild, and (possibly) voice channel
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for all commands on the bot (not just the one in the context object)
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This mainly exists for use by the help formatter,
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but others may find it useful
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Unlike the rest of the permission system, if other models are added later,
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due to optimizations made for this, this needs to be adjusted accordingly
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This does not account for before and after permission hooks,
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these need to be checked seperately
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"""
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return await mass_resolve(ctx=ctx, config=self.config)
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async def __global_check(self, ctx: commands.Context) -> bool:
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"""
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Yes, this is needed on top of hooking into checks.py
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to ensure that unchecked commands can still be managed by permissions
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This should return True in the case of no overrides
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defering to check logic
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This works since all checks must be True to run
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"""
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v = await self.check_overrides(ctx, "all")
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if v is False:
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return False
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return True
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async def check_overrides(self, ctx: commands.Context, level: str) -> bool:
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"""
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This checks for any overrides in the permission model
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Parameters
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----------
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ctx: `redbot.core.context.commands.Context`
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The context of the command
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level: `str`
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One of 'owner', 'guildowner', 'admin', 'mod', 'all'
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Returns
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-------
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bool
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a trinary value using None + bool to resolve permissions for
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checks.py
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"""
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if await ctx.bot.is_owner(ctx.author):
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return True
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before = [
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getattr(cog, "_{0.__class__.__name__}__red_permissions_before".format(cog), None)
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for cog in ctx.bot.cogs.values()
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]
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for check in before:
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if check is None:
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continue
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override = await val_if_check_is_valid(check=check, ctx=ctx, level=level)
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if override is not None:
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return override
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# checked ids + configureable to be checked against
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cache_tup = entries_from_ctx(ctx) + (
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ctx.cog.__class__.__name__,
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ctx.command.qualified_name,
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)
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if cache_tup in self.cache:
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override = self.cache[cache_tup]
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if override is not None:
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return override
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else:
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for model in self.resolution_order[level]:
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if ctx.guild is None and model != "owner":
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break
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override_model = getattr(self, model + "_model", None)
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override = await override_model(ctx) if override_model else None
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if override is not None:
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self.cache[cache_tup] = override
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return override
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# This is intentional not being in an else block
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self.cache[cache_tup] = None
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after = [
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getattr(cog, "_{0.__class__.__name__}__red_permissions_after".format(cog), None)
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for cog in ctx.bot.cogs.values()
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]
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for check in after:
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override = await val_if_check_is_valid(check=check, ctx=ctx, level=level)
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if override is not None:
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return override
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return None
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async def owner_model(self, ctx: commands.Context) -> bool:
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"""
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Handles owner level overrides
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"""
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async with self.config.owner_models() as models:
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return resolve_models(ctx=ctx, models=models)
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async def guildowner_model(self, ctx: commands.Context) -> bool:
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"""
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Handles guild level overrides
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"""
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if ctx.guild is None:
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return None
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async with self.config.guild(ctx.guild).owner_models() as models:
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return resolve_models(ctx=ctx, models=models)
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# Either of the below function signatures could be used
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# without any other modifications required at a later date
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#
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# async def admin_model(self, ctx: commands.Context) -> bool:
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# async def mod_model(self, ctx: commands.Context) -> bool:
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@commands.group(aliases=["p"])
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async def permissions(self, ctx: commands.Context):
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"""
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Permission management tools
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"""
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pass
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@permissions.command()
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async def explain(self, ctx: commands.Context):
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"""
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Provides a detailed explanation of how the permission model functions
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"""
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# Apologies in advance for the translators out there...
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message = _(
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"This cog extends the default permission model of the bot. "
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"By default, many commands are restricted based on what "
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"the command can do."
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"\n"
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"Any command that could impact the host machine, "
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"is generally owner only."
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"\n"
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"Commands that take administrative or moderator "
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"actions in servers generally require a mod or an admin."
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"\n"
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"This cog allows you to refine some of those settings. "
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"You can allow wider or narrower "
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"access to most commands using it."
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"\n\n"
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"When additional rules are set using this cog, "
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"those rules will be checked prior to "
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"checking for the default restrictions of the command. "
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"\n"
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"Rules set globally (by the owner) are checked first, "
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"then rules set for guilds. If multiple global or guild "
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"rules apply to the case, the order they are checked is:"
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"\n"
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"1. Rules about a user.\n"
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"2. Rules about the voice channel a user is in.\n"
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"3. Rules about the text channel a command was issued in.\n"
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"4. Rules about a role the user has "
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"(The highest role they have with a rule will be used).\n"
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"5. Rules about the guild a user is in (Owner level only)."
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"\n\nFor more details, please read the official documentation."
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)
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await ctx.maybe_send_embed(message)
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@permissions.command(name="canrun")
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async def _test_permission_model(
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self, ctx: commands.Context, user: discord.Member, *, command: str
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):
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"""
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This checks if someone can run a command in the current location
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"""
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if not command:
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return await ctx.send_help()
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message = copy(ctx.message)
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message.author = user
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message.content = "{}{}".format(ctx.prefix, command)
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com = self.bot.get_command(command)
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if com is None:
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out = _("No such command")
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else:
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try:
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testcontext = await self.bot.get_context(message, cls=commands.Context)
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can = await com.can_run(testcontext) and all(
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[await p.can_run(testcontext) for p in com.parents]
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)
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except commands.CheckFailure:
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can = False
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out = (
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_("That user can run the specified command.")
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if can
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else _("That user can not run the specified command.")
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)
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await ctx.send(out)
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@checks.is_owner()
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@permissions.command(name="setglobalacl")
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async def owner_set_acl(self, ctx: commands.Context):
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"""
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Take a YAML file upload to set permissions from
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"""
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if not ctx.message.attachments:
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return await ctx.send(_("You must upload a file."))
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try:
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await yamlset_acl(ctx, config=self.config.owner_models, update=False)
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except Exception as e:
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print(e)
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return await ctx.send(_("Invalid syntax."))
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else:
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await ctx.send(_("Rules set."))
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self.invalidate_cache()
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@checks.is_owner()
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@permissions.command(name="getglobalacl")
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async def owner_get_acl(self, ctx: commands.Context):
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"""
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Dumps a YAML file with the current owner level permissions
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"""
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await yamlget_acl(ctx, config=self.config.owner_models)
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@commands.guild_only()
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@checks.guildowner_or_permissions(administrator=True)
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@permissions.command(name="setguildacl")
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async def guild_set_acl(self, ctx: commands.Context):
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"""
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Take a YAML file upload to set permissions from
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"""
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if not ctx.message.attachments:
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return await ctx.send(_("You must upload a file."))
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try:
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await yamlset_acl(ctx, config=self.config.guild(ctx.guild).owner_models, update=False)
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except Exception as e:
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print(e)
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return await ctx.send(_("Invalid syntax."))
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else:
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await ctx.send(_("Rules set."))
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self.invalidate_cache(ctx.guild.id)
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@commands.guild_only()
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@checks.guildowner_or_permissions(administrator=True)
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@permissions.command(name="getguildacl")
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async def guild_get_acl(self, ctx: commands.Context):
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"""
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Dumps a YAML file with the current owner level permissions
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"""
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await yamlget_acl(ctx, config=self.config.guild(ctx.guild).owner_models)
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@commands.guild_only()
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@checks.guildowner_or_permissions(administrator=True)
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@permissions.command(name="updateguildacl")
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async def guild_update_acl(self, ctx: commands.Context):
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"""
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Take a YAML file upload to update permissions from
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Use this to not lose existing rules
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"""
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if not ctx.message.attachments:
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return await ctx.send(_("You must upload a file."))
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try:
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await yamlset_acl(ctx, config=self.config.guild(ctx.guild).owner_models, update=True)
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except Exception as e:
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print(e)
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return await ctx.send(_("Invalid syntax."))
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else:
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await ctx.send(_("Rules set."))
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self.invalidate_cache(ctx.guild.id)
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@checks.is_owner()
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@permissions.command(name="updateglobalacl")
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async def owner_update_acl(self, ctx: commands.Context):
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"""
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Take a YAML file upload to update permissions from
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Use this to not lose existing rules
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"""
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if not ctx.message.attachments:
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return await ctx.send(_("You must upload a file."))
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try:
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await yamlset_acl(ctx, config=self.config.owner_models, update=True)
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except Exception as e:
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print(e)
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return await ctx.send(_("Invalid syntax."))
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else:
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await ctx.send(_("Rules set."))
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self.invalidate_cache()
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@checks.is_owner()
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@permissions.command(name="addglobalrule")
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async def add_to_global_rule(
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self,
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ctx: commands.Context,
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allow_or_deny: RuleType,
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cog_or_command: CogOrCommand,
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who_or_what: str,
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):
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"""
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Adds something to the rules
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allow_or_deny: "allow" or "deny", depending on the rule to modify
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cog_or_command: case sensitive cog or command name
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nested commands should be space seperated, but enclosed in quotes
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who_or_what: what to add to the rule list.
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For best results, use an ID or mention
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The bot will try to uniquely match even without,
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but a failure to do so will raise an error
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This can be a user, role, channel, or guild
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"""
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obj = self.find_object_uniquely(who_or_what)
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if not obj:
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return await ctx.send(_("No unique matches. Try using an ID or mention."))
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model_type, type_name = cog_or_command
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async with self.config.owner_models() as models:
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data = {k: v for k, v in models.items()}
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if model_type not in data:
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data[model_type] = {}
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if type_name not in data[model_type]:
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data[model_type][type_name] = {}
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if allow_or_deny not in data[model_type][type_name]:
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data[model_type][type_name][allow_or_deny] = []
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if obj in data[model_type][type_name][allow_or_deny]:
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return await ctx.send(_("That rule already exists."))
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data[model_type][type_name][allow_or_deny].append(obj)
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models.update(data)
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await ctx.send(_("Rule added."))
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self.invalidate_cache(type_name, obj)
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@commands.guild_only()
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@checks.guildowner_or_permissions(administrator=True)
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@permissions.command(name="addguildrule")
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async def add_to_guild_rule(
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self,
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ctx: commands.Context,
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allow_or_deny: RuleType,
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cog_or_command: CogOrCommand,
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who_or_what: str,
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):
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"""
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Adds something to the rules
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allow_or_deny: "allow" or "deny", depending on the rule to modify
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cog_or_command: case sensitive cog or command name
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nested commands should be space seperated, but enclosed in quotes
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who_or_what: what to add to the rule list.
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For best results, use an ID or mention
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The bot will try to uniquely match even without,
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but a failure to do so will raise an error
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This can be a user, role, channel, or guild
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"""
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obj = self.find_object_uniquely(who_or_what)
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if not obj:
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return await ctx.send(_("No unique matches. Try using an ID or mention."))
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model_type, type_name = cog_or_command
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async with self.config.guild(ctx.guild).owner_models() as models:
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data = {k: v for k, v in models.items()}
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if model_type not in data:
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data[model_type] = {}
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if type_name not in data[model_type]:
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data[model_type][type_name] = {}
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if allow_or_deny not in data[model_type][type_name]:
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data[model_type][type_name][allow_or_deny] = []
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if obj in data[model_type][type_name][allow_or_deny]:
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return await ctx.send(_("That rule already exists."))
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data[model_type][type_name][allow_or_deny].append(obj)
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models.update(data)
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await ctx.send(_("Rule added."))
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self.invalidate_cache(type_name, obj)
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@checks.is_owner()
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@permissions.command(name="removeglobalrule")
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async def rem_from_global_rule(
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self,
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ctx: commands.Context,
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allow_or_deny: RuleType,
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cog_or_command: CogOrCommand,
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who_or_what: str,
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):
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"""
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removes something from the rules
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allow_or_deny: "allow" or "deny", depending on the rule to modify
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cog_or_command: case sensitive cog or command name
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nested commands should be space seperated, but enclosed in quotes
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who_or_what: what to add to the rule list.
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For best results, use an ID or mention
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The bot will try to uniquely match even without,
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but a failure to do so will raise an error
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This can be a user, role, channel, or guild
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"""
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obj = self.find_object_uniquely(who_or_what)
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if not obj:
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return await ctx.send(_("No unique matches. Try using an ID or mention."))
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model_type, type_name = cog_or_command
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async with self.config.owner_models() as models:
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data = {k: v for k, v in models.items()}
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if model_type not in data:
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data[model_type] = {}
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if type_name not in data[model_type]:
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data[model_type][type_name] = {}
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if allow_or_deny not in data[model_type][type_name]:
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data[model_type][type_name][allow_or_deny] = []
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if obj not in data[model_type][type_name][allow_or_deny]:
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return await ctx.send(_("That rule doesn't exist."))
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data[model_type][type_name][allow_or_deny].remove(obj)
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models.update(data)
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await ctx.send(_("Rule removed."))
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self.invalidate_cache(obj, type_name)
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@commands.guild_only()
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@checks.guildowner_or_permissions(administrator=True)
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@permissions.command(name="removeguildrule")
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async def rem_from_guild_rule(
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self,
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ctx: commands.Context,
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allow_or_deny: RuleType,
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cog_or_command: CogOrCommand,
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who_or_what: str,
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):
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"""
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removes something from the rules
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allow_or_deny: "allow" or "deny", depending on the rule to modify
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cog_or_command: case sensitive cog or command name
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nested commands should be space seperated, but enclosed in quotes
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who_or_what: what to add to the rule list.
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For best results, use an ID or mention
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The bot will try to uniquely match even without,
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but a failure to do so will raise an error
|
|
This can be a user, role, channel, or guild
|
|
"""
|
|
obj = self.find_object_uniquely(who_or_what)
|
|
if not obj:
|
|
return await ctx.send(_("No unique matches. Try using an ID or mention."))
|
|
model_type, type_name = cog_or_command
|
|
async with self.config.guild(ctx.guild).owner_models() as models:
|
|
data = {k: v for k, v in models.items()}
|
|
if model_type not in data:
|
|
data[model_type] = {}
|
|
if type_name not in data[model_type]:
|
|
data[model_type][type_name] = {}
|
|
if allow_or_deny not in data[model_type][type_name]:
|
|
data[model_type][type_name][allow_or_deny] = []
|
|
|
|
if obj not in data[model_type][type_name][allow_or_deny]:
|
|
return await ctx.send(_("That rule doesn't exist."))
|
|
|
|
data[model_type][type_name][allow_or_deny].remove(obj)
|
|
models.update(data)
|
|
await ctx.send(_("Rule removed."))
|
|
self.invalidate_cache(obj, type_name)
|
|
|
|
@commands.guild_only()
|
|
@checks.guildowner_or_permissions(administrator=True)
|
|
@permissions.command(name="setdefaultguildrule")
|
|
async def set_default_guild_rule(
|
|
self, ctx: commands.Context, cog_or_command: CogOrCommand, allow_or_deny: RuleType = None
|
|
):
|
|
"""
|
|
Sets the default behavior for a cog or command if no rule is set
|
|
|
|
Use with a cog or command and no setting to clear the default and defer to
|
|
normal check logic
|
|
"""
|
|
if allow_or_deny:
|
|
val_to_set = {"allow": True, "deny": False}.get(allow_or_deny)
|
|
else:
|
|
val_to_set = None
|
|
|
|
model_type, type_name = cog_or_command
|
|
async with self.config.guild(ctx.guild).owner_models() as models:
|
|
data = {k: v for k, v in models.items()}
|
|
if model_type not in data:
|
|
data[model_type] = {}
|
|
if type_name not in data[model_type]:
|
|
data[model_type][type_name] = {}
|
|
|
|
data[model_type][type_name]["default"] = val_to_set
|
|
|
|
models.update(data)
|
|
await ctx.send(_("Default set."))
|
|
self.invalidate_cache(type_name)
|
|
|
|
@checks.is_owner()
|
|
@permissions.command(name="setdefaultglobalrule")
|
|
async def set_default_global_rule(
|
|
self, ctx: commands.Context, cog_or_command: CogOrCommand, allow_or_deny: RuleType = None
|
|
):
|
|
"""
|
|
Sets the default behavior for a cog or command if no rule is set
|
|
|
|
Use with a cog or command and no setting to clear the default and defer to
|
|
normal check logic
|
|
"""
|
|
|
|
if allow_or_deny:
|
|
val_to_set = {"allow": True, "deny": False}.get(allow_or_deny)
|
|
else:
|
|
val_to_set = None
|
|
|
|
model_type, type_name = cog_or_command
|
|
async with self.config.owner_models() as models:
|
|
data = {k: v for k, v in models.items()}
|
|
if model_type not in data:
|
|
data[model_type] = {}
|
|
if type_name not in data[model_type]:
|
|
data[model_type][type_name] = {}
|
|
|
|
data[model_type][type_name]["default"] = val_to_set
|
|
|
|
models.update(data)
|
|
await ctx.send(_("Default set."))
|
|
self.invalidate_cache(type_name)
|
|
|
|
@checks.is_owner()
|
|
@permissions.command(name="clearglobalsettings")
|
|
async def clear_globals(self, ctx: commands.Context):
|
|
"""
|
|
Clears all global rules.
|
|
"""
|
|
await self._confirm_then_clear_rules(ctx, is_guild=False)
|
|
self.invalidate_cache()
|
|
|
|
@commands.guild_only()
|
|
@checks.guildowner_or_permissions(administrator=True)
|
|
@permissions.command(name="clearguildsettings")
|
|
async def clear_guild_settings(self, ctx: commands.Context):
|
|
"""
|
|
Clears all guild rules.
|
|
"""
|
|
await self._confirm_then_clear_rules(ctx, is_guild=True)
|
|
self.invalidate_cache(ctx.guild.id)
|
|
|
|
async def _confirm_then_clear_rules(self, ctx: commands.Context, is_guild: bool):
|
|
if ctx.guild.me.permissions_in(ctx.channel).add_reactions:
|
|
m = await ctx.send(_("Are you sure?"))
|
|
for r in REACTS.keys():
|
|
await m.add_reaction(r)
|
|
try:
|
|
reaction, user = await self.bot.wait_for(
|
|
"reaction_add",
|
|
check=lambda r, u: u == ctx.author and str(r) in REACTS,
|
|
timeout=30,
|
|
)
|
|
except asyncio.TimeoutError:
|
|
return await ctx.send(_("Ok, try responding with an emoji next time."))
|
|
|
|
agreed = REACTS.get(str(reaction))
|
|
else:
|
|
await ctx.send(_("Are you sure? (y/n)"))
|
|
try:
|
|
message = await self.bot.wait_for(
|
|
"message",
|
|
check=lambda m: m.author == ctx.author and m.content in Y_OR_N,
|
|
timeout=30,
|
|
)
|
|
except asyncio.TimeoutError:
|
|
return await ctx.send(_("Ok, try responding with yes or no next time."))
|
|
|
|
agreed = Y_OR_N.get(message.content.lower())
|
|
|
|
if agreed:
|
|
if is_guild:
|
|
await self.config.guild(ctx.guild).owner_models.clear()
|
|
await ctx.send(_("Guild settings cleared."))
|
|
else:
|
|
await self.config.owner_models.clear()
|
|
await ctx.send(_("Global settings cleared."))
|
|
else:
|
|
await ctx.send(_("Okay."))
|
|
|
|
def invalidate_cache(self, *to_invalidate):
|
|
"""
|
|
Either invalidates the entire cache (if given no objects)
|
|
or does a partial invalidation based on passed objects
|
|
"""
|
|
if len(to_invalidate) == 0:
|
|
self.cache.clear()
|
|
return
|
|
# LRUDict inherits from ordered dict, hence the syntax below
|
|
stil_valid = [
|
|
(k, v) for k, v in self.cache.items() if not any(obj in k for obj in to_invalidate)
|
|
]
|
|
self.cache = LRUDict(*stil_valid, size=self.cache.size)
|
|
|
|
def find_object_uniquely(self, info: str) -> int:
|
|
"""
|
|
Finds an object uniquely, returns it's id or returns None
|
|
"""
|
|
if info is None:
|
|
return None
|
|
objs = []
|
|
|
|
objs.extend(self.bot.users)
|
|
for guild in self.bot.guilds:
|
|
objs.extend(guild.roles)
|
|
objs.extend(guild.channels)
|
|
|
|
try:
|
|
_id = int(info)
|
|
except ValueError:
|
|
_id = None
|
|
|
|
for function in (
|
|
lambda x: x.id == _id,
|
|
lambda x: x.mention == info,
|
|
lambda x: str(x) == info,
|
|
lambda x: x.name == info,
|
|
lambda x: (x.nick if hasattr(x, "nick") else None) == info,
|
|
):
|
|
canidates = list(filter(function, objs))
|
|
if len(canidates) == 1:
|
|
return canidates[0].id
|
|
|
|
return None
|