MTPyroger/pyrogram/client/dispatcher/dispatcher.py

# Pyrogram - Telegram MTProto API Client Library for Python
# Copyright (C) 2017-2018 Dan Tès <https://github.com/delivrance>
#
# This file is part of Pyrogram.
#
# Pyrogram is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Pyrogram is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Pyrogram.  If not, see <http://www.gnu.org/licenses/>.

import logging
import threading
from collections import OrderedDict
from queue import Queue
from threading import Thread

import pyrogram
from pyrogram.api import types
from ..ext import utils
from ..handlers import RawUpdateHandler, CallbackQueryHandler, MessageHandler

log = logging.getLogger(__name__)


class Dispatcher:
    NEW_MESSAGE_UPDATES = (
        types.UpdateNewMessage,
        types.UpdateNewChannelMessage
    )

    EDIT_MESSAGE_UPDATES = (
        types.UpdateEditMessage,
        types.UpdateEditChannelMessage
    )

    MESSAGE_UPDATES = NEW_MESSAGE_UPDATES + EDIT_MESSAGE_UPDATES

    def __init__(self, client, workers):
        self.client = client
        self.workers = workers
        self.workers_list = []
        self.updates = Queue()
        self.groups = OrderedDict()

        self._handler_lock = threading.Lock()

    def start(self):
        for i in range(self.workers):
            self.workers_list.append(
                Thread(
                    target=self.update_worker,
                    name="UpdateWorker#{}".format(i + 1)
                )
            )

            self.workers_list[-1].start()

    def stop(self):
        for _ in range(self.workers):
            self.updates.put(None)

        for i in self.workers_list:
            i.join()

        self.workers_list.clear()

    def add_handler(self, handler, group: int):
        with self._handler_lock:
            if group not in self.groups:
                self.groups[group] = []
                self.groups = OrderedDict(sorted(self.groups.items()))

            self.groups[group].append(handler)

    def remove_handler(self, handler, group: int):
        with self._handler_lock:
            if group not in self.groups:
                raise ValueError("Group {} does not exist. "
                                 "Handler was not removed.".format(group))
            self.groups[group].remove(handler)

    def dispatch(self, update, users: dict = None, chats: dict = None, is_raw: bool = False):
        with self._handler_lock:
            for group in self.groups.values():
                for handler in group:
                    if is_raw:
                        if not isinstance(handler, RawUpdateHandler):
                            continue

                        args = (self.client, update, users, chats)
                    else:
                        message = (update.message
                                   or update.channel_post
                                   or update.edited_message
                                   or update.edited_channel_post)

                        callback_query = update.callback_query

                        if message and isinstance(handler, MessageHandler):
                            if not handler.check(message):
                                continue

                            args = (self.client, message)
                        elif callback_query and isinstance(handler, CallbackQueryHandler):
                            if not handler.check(callback_query):
                                continue

                            args = (self.client, callback_query)
                        else:
                            continue

                    handler.callback(*args)
                    break

    def update_worker(self):
        name = threading.current_thread().name
        log.debug("{} started".format(name))

        while True:
            update = self.updates.get()

            if update is None:
                break

            try:
                users = {i.id: i for i in update[1]}
                chats = {i.id: i for i in update[2]}
                update = update[0]

                self.dispatch(update, users=users, chats=chats, is_raw=True)

                if isinstance(update, Dispatcher.MESSAGE_UPDATES):
                    if isinstance(update.message, types.Message):
                        parser = utils.parse_message
                    elif isinstance(update.message, types.MessageService):
                        parser = utils.parse_message_service
                    else:
                        continue

                    message = parser(
                        self.client,
                        update.message,
                        users,
                        chats
                    )

                    is_edited_message = isinstance(update, Dispatcher.EDIT_MESSAGE_UPDATES)

                    self.dispatch(
                        pyrogram.Update(
                            message=((message if message.chat.type != "channel"
                                      else None) if not is_edited_message
                                     else None),
                            edited_message=((message if message.chat.type != "channel"
                                             else None) if is_edited_message
                                            else None),
                            channel_post=((message if message.chat.type == "channel"
                                           else None) if not is_edited_message
                                          else None),
                            edited_channel_post=((message if message.chat.type == "channel"
                                                  else None) if is_edited_message
                                                 else None)
                        )
                    )
                elif isinstance(update, types.UpdateBotCallbackQuery):
                    self.dispatch(
                        pyrogram.Update(
                            callback_query=utils.parse_callback_query(
                                self.client, update, users
                            )
                        )
                    )
                else:
                    continue
            except Exception as e:
                log.error(e, exc_info=True)

        log.debug("{} stopped".format(name))