mirror of
https://github.com/LonamiWebs/Telethon.git
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Separate update requests from the TelegramClient
This commit is contained in:
Lonami Exo
parent
ac2e59b472
commit
fb8b052754
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@ -1,206 +1,2 @@
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import logging
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import warnings
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from ..tl.functions.updates import GetDifferenceRequest
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from ..tl.types.updates import (
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DifferenceSlice, DifferenceEmpty, Difference, DifferenceTooLong
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)
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try:
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import socks
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except ImportError:
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socks = None
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from .telegrambaseclient import TelegramBaseClient
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from .. import events
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from ..tl.types import (
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UpdateNewMessage, Updates
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)
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__log__ = logging.getLogger(__name__)
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class TelegramClient(TelegramBaseClient):
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"""
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Initializes the Telegram client with the specified API ID and Hash. This
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is identical to the `telethon.telegram_bare_client.TelegramBareClient`
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but it contains "friendly methods", so please refer to its documentation
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to know what parameters you can use when creating a new instance.
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"""
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# region Telegram requests functions
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# region Event handling
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def on(self, event):
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"""
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Decorator helper method around add_event_handler().
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Args:
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event (`_EventBuilder` | `type`):
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The event builder class or instance to be used,
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for instance ``events.NewMessage``.
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"""
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def decorator(f):
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self.add_event_handler(f, event)
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return f
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return decorator
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def _check_events_pending_resolve(self):
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if self._events_pending_resolve:
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for event in self._events_pending_resolve:
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event.resolve(self)
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self._events_pending_resolve.clear()
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def _on_handler(self, update):
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for builder, callback in self._event_builders:
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event = builder.build(update)
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if event:
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if hasattr(event, '_set_client'):
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event._set_client(self)
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else:
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event._client = self
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event.original_update = update
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try:
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callback(event)
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except events.StopPropagation:
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__log__.debug(
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"Event handler '{}' stopped chain of "
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"propagation for event {}."
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.format(callback.__name__, type(event).__name__)
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)
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break
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def add_event_handler(self, callback, event=None):
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"""
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Registers the given callback to be called on the specified event.
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Args:
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callback (`callable`):
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The callable function accepting one parameter to be used.
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event (`_EventBuilder` | `type`, optional):
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The event builder class or instance to be used,
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for instance ``events.NewMessage``.
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If left unspecified, `telethon.events.raw.Raw` (the
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:tl:`Update` objects with no further processing) will
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be passed instead.
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"""
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if self.updates.workers is None:
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warnings.warn(
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"You have not setup any workers, so you won't receive updates."
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" Pass update_workers=1 when creating the TelegramClient,"
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" or set client.self.updates.workers = 1"
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)
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self.updates.handler = self._on_handler
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if isinstance(event, type):
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event = event()
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elif not event:
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event = events.Raw()
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if self.is_user_authorized():
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event.resolve(self)
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self._check_events_pending_resolve()
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else:
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self._events_pending_resolve.append(event)
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self._event_builders.append((event, callback))
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def remove_event_handler(self, callback, event=None):
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"""
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Inverse operation of :meth:`add_event_handler`.
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If no event is given, all events for this callback are removed.
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Returns how many callbacks were removed.
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"""
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found = 0
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if event and not isinstance(event, type):
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event = type(event)
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i = len(self._event_builders)
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while i:
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i -= 1
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ev, cb = self._event_builders[i]
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if cb == callback and (not event or isinstance(ev, event)):
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del self._event_builders[i]
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found += 1
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return found
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def list_event_handlers(self):
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"""
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Lists all added event handlers, returning a list of pairs
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consisting of (callback, event).
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"""
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return [(callback, event) for event, callback in self._event_builders]
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def add_update_handler(self, handler):
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"""Deprecated, see :meth:`add_event_handler`."""
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warnings.warn(
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'add_update_handler is deprecated, use the @client.on syntax '
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'or add_event_handler(callback, events.Raw) instead (see '
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'https://telethon.rtfd.io/en/latest/extra/basic/working-'
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'with-updates.html)'
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)
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return self.add_event_handler(handler, events.Raw)
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def remove_update_handler(self, handler):
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return self.remove_event_handler(handler)
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def list_update_handlers(self):
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return [callback for callback, _ in self.list_event_handlers()]
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def catch_up(self):
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state = self.session.get_update_state(0)
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if not state or not state.pts:
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return
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self.session.catching_up = True
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try:
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while True:
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d = self(GetDifferenceRequest(state.pts, state.date, state.qts))
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if isinstance(d, DifferenceEmpty):
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state.date = d.date
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state.seq = d.seq
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break
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elif isinstance(d, (DifferenceSlice, Difference)):
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if isinstance(d, Difference):
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state = d.state
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elif d.intermediate_state.pts > state.pts:
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state = d.intermediate_state
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else:
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# TODO Figure out why other applications can rely on
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# using always the intermediate_state to eventually
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# reach a DifferenceEmpty, but that leads to an
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# infinite loop here (so check against old pts to stop)
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break
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self.updates.process(Updates(
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users=d.users,
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chats=d.chats,
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date=state.date,
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seq=state.seq,
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updates=d.other_updates + [UpdateNewMessage(m, 0, 0)
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for m in d.new_messages]
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))
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elif isinstance(d, DifferenceTooLong):
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break
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finally:
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self.session.set_update_state(0, state)
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self.session.catching_up = False
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# endregion
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# region Small utilities to make users' life easier
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def _set_connected_and_authorized(self):
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super()._set_connected_and_authorized()
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self._check_events_pending_resolve()
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# endregion
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class TelegramClient:
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pass
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176
telethon/client/updates.py
Normal file
176
telethon/client/updates.py
Normal file
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@ -0,0 +1,176 @@
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import warnings
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from .users import UserMethods
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from ..tl import types, functions
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from .. import events
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import logging
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__log__ = logging.getLogger(__name__)
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class UpdateMethods(UserMethods):
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# region Public methods
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def on(self, event):
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"""
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Decorator helper method around add_event_handler().
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Args:
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event (`_EventBuilder` | `type`):
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The event builder class or instance to be used,
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for instance ``events.NewMessage``.
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"""
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def decorator(f):
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self.add_event_handler(f, event)
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return f
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return decorator
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def add_event_handler(self, callback, event=None):
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"""
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Registers the given callback to be called on the specified event.
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Args:
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callback (`callable`):
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The callable function accepting one parameter to be used.
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event (`_EventBuilder` | `type`, optional):
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The event builder class or instance to be used,
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for instance ``events.NewMessage``.
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If left unspecified, `telethon.events.raw.Raw` (the
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:tl:`Update` objects with no further processing) will
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be passed instead.
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"""
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self.updates.handler = self._on_handler
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if isinstance(event, type):
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event = event()
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elif not event:
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event = events.Raw()
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self._events_pending_resolve.append(event)
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self._event_builders.append((event, callback))
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def remove_event_handler(self, callback, event=None):
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"""
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Inverse operation of :meth:`add_event_handler`.
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If no event is given, all events for this callback are removed.
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Returns how many callbacks were removed.
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"""
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found = 0
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if event and not isinstance(event, type):
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event = type(event)
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i = len(self._event_builders)
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while i:
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i -= 1
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ev, cb = self._event_builders[i]
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if cb == callback and (not event or isinstance(ev, event)):
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del self._event_builders[i]
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found += 1
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return found
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def list_event_handlers(self):
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"""
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Lists all added event handlers, returning a list of pairs
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consisting of (callback, event).
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"""
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return [(callback, event) for event, callback in self._event_builders]
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def add_update_handler(self, handler):
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"""Deprecated, see :meth:`add_event_handler`."""
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warnings.warn(
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'add_update_handler is deprecated, use the @client.on syntax '
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'or add_event_handler(callback, events.Raw) instead (see '
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'https://telethon.rtfd.io/en/latest/extra/basic/working-'
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'with-updates.html)'
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)
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return self.add_event_handler(handler, events.Raw)
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def remove_update_handler(self, handler):
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return self.remove_event_handler(handler)
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def list_update_handlers(self):
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return [callback for callback, _ in self.list_event_handlers()]
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async def catch_up(self):
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state = self.session.get_update_state(0)
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if not state or not state.pts:
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return
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self.session.catching_up = True
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try:
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while True:
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d = await self(functions.updates.GetDifferenceRequest(
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state.pts, state.date, state.qts))
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if isinstance(d, types.updates.DifferenceEmpty):
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state.date = d.date
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state.seq = d.seq
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break
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elif isinstance(d, (types.updates.DifferenceSlice,
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types.updates.Difference)):
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if isinstance(d, types.updates.Difference):
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state = d.state
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elif d.intermediate_state.pts > state.pts:
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state = d.intermediate_state
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else:
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# TODO Figure out why other applications can rely on
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# using always the intermediate_state to eventually
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# reach a DifferenceEmpty, but that leads to an
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# infinite loop here (so check against old pts to stop)
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break
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self.updates.process(types.Updates(
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users=d.users,
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chats=d.chats,
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date=state.date,
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seq=state.seq,
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updates=d.other_updates + [
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types.UpdateNewMessage(m, 0, 0)
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for m in d.new_messages
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]
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))
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elif isinstance(d, types.updates.DifferenceTooLong):
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break
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finally:
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self.session.set_update_state(0, state)
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self.session.catching_up = False
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# endregion
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# region Private methods
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async def _on_handler(self, update):
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if self._events_pending_resolve:
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for event in self._events_pending_resolve:
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await event.resolve(self)
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self._events_pending_resolve.clear()
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for builder, callback in self._event_builders:
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event = builder.build(update)
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if event:
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if hasattr(event, '_set_client'):
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event._set_client(self)
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else:
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event._client = self
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event.original_update = update
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try:
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await callback(event)
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except events.StopPropagation:
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__log__.debug(
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"Event handler '{}' stopped chain of "
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"propagation for event {}."
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.format(callback.__name__,
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type(event).__name__)
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)
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break
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except:
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__log__.exception('Unhandled exception on {}'
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.format(callback.__name__))
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# endregion
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