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# Copyright Pincer 2021-Present |
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# Full MIT License can be found in `LICENSE` at the project root. |
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from __future__ import annotations |
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from asyncio import ensure_future |
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from contextlib import suppress |
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from importlib import reload, import_module |
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from inspect import isclass |
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from types import ModuleType |
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from typing import TYPE_CHECKING, List |
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from . import client as _client |
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from .commands.chat_command_handler import ChatCommandHandler |
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from .commands.interactable import Interactable |
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from .exceptions import CogAlreadyExists, CogNotFound |
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if TYPE_CHECKING: |
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from typing import Type |
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from .client import Client |
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class CogManager: |
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""" |
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A class that can load and unload cogs |
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""" |
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def load_cog(self, cog: Type[Cog]): |
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"""Load a cog from a string path, setup method in COG may |
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optionally have a first argument which will contain the client! |
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:Example usage: |
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run.py |
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.. code-block:: python3 |
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from pincer import Client |
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from cogs.say import SayCommand |
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class MyClient(Client): |
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def __init__(self, *args, **kwargs): |
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self.load_cog(SayCommand) |
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super().__init__(*args, **kwargs) |
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cogs/say.py |
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.. code-block:: python3 |
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from pincer import command |
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class SayCommand(Cog): |
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@command() |
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async def say(self, message: str) -> str: |
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return message |
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Parameters |
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---------- |
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cog : Type[:class:`~pincer.cog.Cog`] |
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The cog to load. |
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""" |
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if cog in ChatCommandHandler.managers: |
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raise CogAlreadyExists( |
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f"Cog `{cog}` is trying to be loaded but already exists." |
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) |
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cog_manager = cog(self) |
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ChatCommandHandler.managers.append(cog_manager) |
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def load_cogs(self, *cogs: Type[Cog]): |
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""" |
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Loads a list of cogs |
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Parameters |
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---------- |
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\\*cogs : Type[:class:`~pincer.cog.Cog`] |
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A list of cogs to load. |
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""" |
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for cog in cogs: |
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self.load_cog(cog) |
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def load_module(self, module: ModuleType): |
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"""Loads the cogs from a module recursively. |
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Parameters |
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---------- |
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module : :class:`~types.ModuleType` |
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The module to load. |
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""" |
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for item in vars(module).values(): |
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if isinstance(item, ModuleType): |
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self.load_module(item) |
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elif item is not Cog and isclass(item) and issubclass(item, Cog): |
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self.load_cog(item) |
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def reload_cogs(self): |
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"""Reloads all of the loaded cogs""" |
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modules = [] |
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for cog in self.cogs: |
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cog.unassign() |
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mod = import_module(type(cog).__module__) |
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if mod not in modules: |
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modules.append(mod) |
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for mod in modules: |
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reload(mod) |
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for cog in self.cogs: |
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for mod in modules: |
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with suppress(AttributeError): |
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cog = getattr(mod, type(cog).__name__) |
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self.load_cog(cog) |
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ChatCommandHandler.has_been_initialized = False |
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ensure_future(ChatCommandHandler(self).initialize()) |
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@property |
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def cogs(self) -> List[Cog]: |
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"""Get a dictionary of all loaded cogs. |
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The key/value pair is import path/cog class. |
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Returns |
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------- |
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List[:class:`~pincer.cog.Cog`] |
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The list of cogs |
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""" |
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return [ |
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manager for manager in ChatCommandHandler.managers |
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if isinstance(manager, Cog) |
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] |
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class Cog(Interactable): |
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"""A cog object |
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This is an object that can register commands and message components that isn't a |
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client. It also can be loaded and unloaded at runtime so commands can be changed |
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without restarting the bot. |
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""" |
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def __init__(self, client: Client) -> None: |
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self.client = client |
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super().__init__() |
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@classmethod |
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def name(cls) -> str: |
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""" |
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Returns a unique name for this cog. |
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Returns |
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------- |
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str |
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A unique name for this cog. |
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""" |
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return f"{cls.__module__}.{cls.__name__}" |
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Pincer-org /
Pincer
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