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https://github.com/Steffo99/greed.git
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74 lines
No EOL
2.8 KiB
Python
74 lines
No EOL
2.8 KiB
Python
import threading
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import telegram
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import strings
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import configloader
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import sys
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import queue as queuem
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# Load the configuration
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config = configloader.load_config()
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class StopSignal:
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"""A data class that should be sent to the worker when the conversation has to be stopped abnormally."""
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def __init__(self, reason: str=""):
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self.reason = reason
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class ChatWorker:
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"""A worker for a single conversation. A new one should be created every time the /start command is sent."""
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def __init__(self, bot: telegram.Bot, chat: telegram.Chat):
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# The sending pipe is stored in the ChatWorker class, allowing the forwarding of messages to the chat process
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self.queue = queuem.Queue()
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# A new thread running the conversation handler is created, and the queue is passed to its arguments to enable the receiving of messages
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self.thread = threading.Thread(target=conversation_handler, args=(bot, chat, self.queue))
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def start(self):
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"""Start the worker process."""
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self.thread.start()
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def stop(self, reason: str=""):
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"""Gracefully stop the worker process"""
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# Send a stop message to the thread
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self.queue.put(StopSignal(reason))
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# Wait for the thread to stop
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self.thread.join()
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# TODO: maybe move these functions to a class
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def graceful_stop(bot: telegram.Bot, chat: telegram.Chat, queue):
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"""Handle the graceful stop of the process."""
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# Notify the user that the session has expired
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bot.send_message(chat.id, strings.conversation_expired)
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# End the process
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sys.exit(0)
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def receive_next_update(bot: telegram.Bot, chat: telegram.Chat, queue) -> telegram.Update:
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"""Get the next update from a pipe.
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If no update is found, block the process until one is received.
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If a stop signal is sent, try to gracefully stop the process."""
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# Pop data from the queue
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try:
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data = queue.get(timeout=int(config["Telegram"]["conversation_timeout"]))
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except queuem.Empty:
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# If the conversation times out, gracefully stop the thread
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graceful_stop(bot, chat, queue)
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# Check if the data is a stop signal instance
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if isinstance(data, StopSignal):
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# Gracefully stop the process
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graceful_stop(bot, chat, queue)
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# Return the received update
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return data
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def conversation_handler(bot: telegram.Bot, chat: telegram.Chat, queue):
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"""This function is ran once for every conversation (/start command) by a separate process."""
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# TODO: catch all the possible exceptions
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# Welcome the user to the bot
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bot.send_message(chat.id, strings.conversation_after_start)
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# TODO: Send a command list or something
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while True:
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# For now, echo the sent message
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update = receive_next_update(bot, chat, queue)
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bot.send_message(chat.id, f"{threading.current_thread().name} {update.message.text}") |