mirror of
https://github.com/LonamiWebs/Telethon.git
synced 2024-11-30 05:13:45 +03:00
275 lines
10 KiB
Python
275 lines
10 KiB
Python
import asyncio
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import inspect
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import itertools
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import random
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import sys
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import time
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import traceback
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import typing
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import logging
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import inspect
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import bisect
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import warnings
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from collections import deque
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from ..errors._rpcbase import RpcError
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from .._events.raw import Raw
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from .._events.base import StopPropagation, EventBuilder, EventHandler
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from .._events.filters import make_filter, NotResolved
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from .._misc import utils
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from .. import _tl
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if typing.TYPE_CHECKING:
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from .telegramclient import TelegramClient
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Callback = typing.Callable[[typing.Any], typing.Any]
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async def set_receive_updates(self: 'TelegramClient', receive_updates):
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self._no_updates = not receive_updates
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if receive_updates:
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await self(_tl.fn.updates.GetState())
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async def run_until_disconnected(self: 'TelegramClient'):
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# Make a high-level request to notify that we want updates
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await self(_tl.fn.updates.GetState())
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await self._sender.wait_disconnected()
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def on(self: 'TelegramClient', *events, priority=0, **filters):
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def decorator(f):
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for event in events:
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self.add_event_handler(f, event, priority=priority, **filters)
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return f
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return decorator
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def add_event_handler(
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self: 'TelegramClient',
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callback=None,
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event=None,
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priority=0,
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**filters
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):
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if callback is None:
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return functools.partial(add_event_handler, self, event=event, priority=priority, **filters)
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if event is None:
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for param in inspect.signature(callback).parameters.values():
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event = None if param.annotation is inspect.Signature.empty else param.annotation
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break # only check the first parameter
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if event is None:
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event = Raw
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if not inspect.iscoroutinefunction(callback):
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raise TypeError(f'callback was not an async def function: {callback!r}')
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if not isinstance(event, type):
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raise TypeError(f'event type was not a type (an instance of something was probably used): {event!r}')
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if not isinstance(priority, int):
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raise TypeError(f'priority was not an integer: {priority!r}')
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if not issubclass(event, EventBuilder):
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try:
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if event.SUBCLASS_OF_ID != 0x9f89304e:
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raise TypeError(f'invalid raw update type for the event handler: {event!r}')
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if 'types' in filters:
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warnings.warn('"types" filter is ignored when the event type already is a raw update')
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filters['types'] = event
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event = Raw
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except AttributeError:
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raise TypeError(f'unrecognized event handler type: {param.annotation!r}')
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handler = EventHandler(event, callback, priority, make_filter(**filters))
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if self._dispatching_update_handlers:
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# Now that there's a copy, we're no longer dispatching from the old update_handlers,
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# so we can modify it. This is why we can turn the flag off.
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self._update_handlers = self._update_handlers[:]
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self._dispatching_update_handlers = False
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bisect.insort(self._update_handlers, handler)
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return handler
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def remove_event_handler(
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self: 'TelegramClient',
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callback,
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event,
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priority,
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):
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if callback is None and event is None and priority is None:
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raise ValueError('must specify at least one of callback, event or priority')
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if not self._update_handlers:
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return [] # won't be removing anything (some code paths rely on non-empty lists)
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if self._dispatching_update_handlers:
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# May be an unnecessary copy if nothing was removed, but that's not a big deal.
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self._update_handlers = self._update_handlers[:]
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self._dispatching_update_handlers = False
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if isinstance(callback, EventHandler):
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if event is not None or priority is not None:
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warnings.warn('event and priority are ignored when removing EventHandler instances')
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index = bisect.bisect_left(self._update_handlers, callback)
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try:
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if self._update_handlers[index] == callback:
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return [self._update_handlers.pop(index)]
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except IndexError:
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pass
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return []
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if priority is not None:
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# can binary-search (using a dummy EventHandler)
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index = bisect.bisect_right(self._update_handlers, EventHandler(None, None, priority, None))
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try:
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while self._update_handlers[index].priority == priority:
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index += 1
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except IndexError:
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pass
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removed = []
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while index > 0 and self._update_handlers[index - 1].priority == priority:
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index -= 1
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if callback is not None and self._update_handlers[index].callback != callback:
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continue
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if event is not None and self._update_handlers[index].event != event:
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continue
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removed.append(self._update_handlers.pop(index))
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return removed
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# slow-path, remove all matching
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removed = []
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for index, handler in reversed(enumerate(self._update_handlers)):
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if callback is not None and handler.callback != callback:
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continue
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if event is not None and handler.event != event:
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continue
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removed.append(self._update_handlers.pop(index))
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return removed
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def list_event_handlers(self: 'TelegramClient')\
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-> 'typing.Sequence[typing.Tuple[Callback, EventBuilder]]':
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return self._update_handlers[:]
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async def catch_up(self: 'TelegramClient'):
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# The update loop is probably blocked on either timeout or an update to arrive.
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# Unblock the loop by pushing a dummy update which will always trigger a gap.
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# This, in return, causes the update loop to catch up.
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await self._updates_queue.put(_tl.UpdatesTooLong())
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async def _update_loop(self: 'TelegramClient'):
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try:
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updates_to_dispatch = deque()
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while self.is_connected():
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if updates_to_dispatch:
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await _dispatch(self, *updates_to_dispatch.popleft())
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continue
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get_diff = self._message_box.get_difference()
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if get_diff:
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self._log[__name__].info('Getting difference for account updates')
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diff = await self(get_diff)
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updates, users, chats = self._message_box.apply_difference(diff, self._entity_cache)
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updates_to_dispatch.extend(_preprocess_updates(self, updates, users, chats))
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continue
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get_diff = self._message_box.get_channel_difference(self._entity_cache)
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if get_diff:
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self._log[__name__].info('Getting difference for channel updates')
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diff = await self(get_diff)
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updates, users, chats = self._message_box.apply_channel_difference(get_diff, diff, self._entity_cache)
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updates_to_dispatch.extend(_preprocess_updates(self, updates, users, chats))
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continue
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deadline = self._message_box.check_deadlines()
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try:
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updates = await asyncio.wait_for(
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self._updates_queue.get(),
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deadline - asyncio.get_running_loop().time()
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)
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except asyncio.TimeoutError:
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self._log[__name__].info('Timeout waiting for updates expired')
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continue
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processed = []
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users, chats = self._message_box.process_updates(updates, self._entity_cache, processed)
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updates_to_dispatch.extend(_preprocess_updates(self, processed, users, chats))
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except Exception:
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self._log[__name__].exception('Fatal error handling updates (this is a bug in Telethon, please report it)')
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def _preprocess_updates(self, updates, users, chats):
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self._entity_cache.extend(users, chats)
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entities = Entities(self, users, chats)
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return ((u, entities) for u in updates)
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class Entities:
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def __init__(self, client, users, chats):
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self.self_id = client._session_state.user_id
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self._entities = {e.id: e for e in itertools.chain(
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(User(client, u) for u in users),
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(Chat(client, c) for u in chats),
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)}
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def get(self, client, peer):
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if not peer:
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return None
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id = utils.get_peer_id(peer)
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try:
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return self._entities[id]
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except KeyError:
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entity = client._entity_cache.get(query.user_id)
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if not entity:
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raise RuntimeError('Update is missing a hash but did not trigger a gap')
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self._entities[entity.id] = User(client, entity) if entity.is_user else Chat(client, entity)
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return self._entities[entity.id]
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async def _dispatch(self, update, entities):
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self._dispatching_update_handlers = True
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try:
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event_cache = {}
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for handler in self._update_handlers:
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event, entities = event_cache.get(handler._event)
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if not event:
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# build can fail if we're missing an access hash; we want this to crash
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event_cache[handler._event] = event = handler._event._build(self, update, entities)
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while True:
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# filters can be modified at any time, and there can be any amount of them which are not yet resolved
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try:
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if handler._filter(event):
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try:
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await handler._callback(event)
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except StopPropagation:
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return
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except Exception:
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name = getattr(handler._callback, '__name__', repr(handler._callback))
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self._log[__name__].exception('Unhandled exception on %s (this is likely a bug in your code)', name)
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except NotResolved as nr:
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try:
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await nr.unresolved.resolve()
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continue
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except Exception as e:
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# we cannot really do much about this; it might be a temporary network issue
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warnings.warn(f'failed to resolve filter, handler will be skipped: {e}: {nr.unresolved!r}')
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except Exception as e:
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# invalid filter (e.g. types when types were not used as input)
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warnings.warn(f'invalid filter applied, handler will be skipped: {e}: {e.filter!r}')
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# we only want to continue on unresolved filter (to check if there are more unresolved)
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break
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finally:
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self._dispatching_update_handlers = False
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