248 lines
8.1 KiB
Python
248 lines
8.1 KiB
Python
# maubot - A plugin-based Matrix bot system.
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# Copyright (C) 2018 Tulir Asokan
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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from typing import Dict, List, Optional
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from asyncio import AbstractEventLoop
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import logging
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import io
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from sqlalchemy.orm import Session
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from ruamel.yaml.comments import CommentedMap
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from ruamel.yaml import YAML
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from mautrix.util.config import BaseProxyConfig, RecursiveDict
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from mautrix.types import UserID
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from .db import DBPlugin
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from .config import Config
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from .client import Client
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from .loader import PluginLoader
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from .plugin_base import Plugin
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log = logging.getLogger("maubot.plugin")
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yaml = YAML()
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yaml.indent(4)
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class PluginInstance:
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db: Session = None
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mb_config: Config = None
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loop: AbstractEventLoop = None
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cache: Dict[str, 'PluginInstance'] = {}
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plugin_directories: List[str] = []
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log: logging.Logger
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loader: PluginLoader
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client: Client
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plugin: Plugin
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config: BaseProxyConfig
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base_cfg: RecursiveDict[CommentedMap]
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started: bool
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def __init__(self, db_instance: DBPlugin):
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self.db_instance = db_instance
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self.log = logging.getLogger(f"maubot.plugin.{self.id}")
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self.config = None
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self.started = False
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self.loader = None
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self.client = None
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self.plugin = None
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self.base_cfg = None
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self.cache[self.id] = self
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def to_dict(self) -> dict:
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return {
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"id": self.id,
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"type": self.type,
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"enabled": self.enabled,
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"started": self.started,
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"primary_user": self.primary_user,
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"config": self.db_instance.config,
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}
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def load(self) -> None:
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try:
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self.loader = PluginLoader.find(self.type)
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except KeyError:
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self.log.error(f"Failed to find loader for type {self.type}")
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self.db_instance.enabled = False
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return
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self.client = Client.get(self.primary_user)
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if not self.client:
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self.log.error(f"Failed to get client for user {self.primary_user}")
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self.db_instance.enabled = False
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return
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self.log.debug("Plugin instance dependencies loaded")
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self.loader.references.add(self)
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self.client.references.add(self)
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def delete(self) -> None:
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if self.loader is not None:
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self.loader.references.remove(self)
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if self.client is not None:
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self.client.references.remove(self)
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try:
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del self.cache[self.id]
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except KeyError:
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pass
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self.db.delete(self.db_instance)
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self.db.commit()
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# TODO delete plugin db
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def load_config(self) -> CommentedMap:
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return yaml.load(self.db_instance.config)
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def save_config(self, data: RecursiveDict[CommentedMap]) -> None:
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buf = io.StringIO()
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yaml.dump(data, buf)
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self.db_instance.config = buf.getvalue()
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async def start(self) -> None:
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if self.started:
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self.log.warning("Ignoring start() call to already started plugin")
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return
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elif not self.enabled:
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self.log.warning("Plugin disabled, not starting.")
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return
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cls = await self.loader.load()
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config_class = cls.get_config_class()
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if config_class:
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try:
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base = await self.loader.read_file("base-config.yaml")
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self.base_cfg = RecursiveDict(yaml.load(base.decode("utf-8")), CommentedMap)
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except (FileNotFoundError, KeyError):
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self.base_cfg = None
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self.config = config_class(self.load_config, lambda: self.base_cfg, self.save_config)
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self.plugin = cls(self.client.client, self.loop, self.client.http_client, self.id,
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self.log, self.config, self.mb_config["plugin_directories.db"])
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try:
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await self.plugin.start()
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except Exception:
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self.log.exception("Failed to start instance")
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self.db_instance.enabled = False
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return
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self.started = True
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self.log.info(f"Started instance of {self.loader.id} v{self.loader.version} "
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f"with user {self.client.id}")
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async def stop(self) -> None:
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if not self.started:
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self.log.warning("Ignoring stop() call to non-running plugin")
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return
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self.log.debug("Stopping plugin instance...")
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self.started = False
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try:
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await self.plugin.stop()
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except Exception:
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self.log.exception("Failed to stop instance")
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self.plugin = None
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@classmethod
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def get(cls, instance_id: str, db_instance: Optional[DBPlugin] = None
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) -> Optional['PluginInstance']:
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try:
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return cls.cache[instance_id]
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except KeyError:
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db_instance = db_instance or DBPlugin.query.get(instance_id)
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if not db_instance:
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return None
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return PluginInstance(db_instance)
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@classmethod
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def all(cls) -> List['PluginInstance']:
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return [cls.get(plugin.id, plugin) for plugin in DBPlugin.query.all()]
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def update_id(self, new_id: str) -> None:
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if new_id is not None and new_id != self.id:
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self.db_instance.id = new_id
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def update_config(self, config: str) -> None:
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if not config or self.db_instance.config == config:
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return
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self.db_instance.config = config
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if self.started and self.plugin is not None:
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self.plugin.on_external_config_update()
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async def update_primary_user(self, primary_user: UserID) -> bool:
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if not primary_user or primary_user == self.primary_user:
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return True
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client = Client.get(primary_user)
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if not client:
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return False
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await self.stop()
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self.db_instance.primary_user = client.id
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self.client.references.remove(self)
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self.client = client
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self.client.references.add(self)
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await self.start()
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self.log.debug(f"Primary user switched to {self.client.id}")
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return True
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async def update_type(self, type: str) -> bool:
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if not type or type == self.type:
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return True
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try:
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loader = PluginLoader.find(type)
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except KeyError:
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return False
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await self.stop()
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self.db_instance.type = loader.id
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self.loader.references.remove(self)
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self.loader = loader
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self.loader.references.add(self)
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await self.start()
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self.log.debug(f"Type switched to {self.loader.id}")
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return True
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async def update_started(self, started: bool) -> None:
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if started is not None and started != self.started:
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await (self.start() if started else self.stop())
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def update_enabled(self, enabled: bool) -> None:
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if enabled is not None and enabled != self.enabled:
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self.db_instance.enabled = enabled
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# region Properties
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@property
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def id(self) -> str:
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return self.db_instance.id
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@id.setter
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def id(self, value: str) -> None:
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self.db_instance.id = value
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@property
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def type(self) -> str:
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return self.db_instance.type
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@property
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def enabled(self) -> bool:
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return self.db_instance.enabled
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@property
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def primary_user(self) -> UserID:
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return self.db_instance.primary_user
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# endregion
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def init(db: Session, config: Config, loop: AbstractEventLoop) -> List[PluginInstance]:
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PluginInstance.db = db
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PluginInstance.mb_config = config
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PluginInstance.loop = loop
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return PluginInstance.all()
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