262 lines
7.4 KiB
Python
262 lines
7.4 KiB
Python
# -*- coding: utf-8 -*-
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import random
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import re
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import string
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import sys
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import threading
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import traceback
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import six
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from six import string_types
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# Python3 queue support.
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try:
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import Queue
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except ImportError:
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import queue as Queue
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import logging
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logger = logging.getLogger('TeleBot')
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thread_local = threading.local()
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class WorkerThread(threading.Thread):
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count = 0
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def __init__(self, exception_callback=None, queue=None, name=None):
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if not name:
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name = "WorkerThread{0}".format(self.__class__.count + 1)
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self.__class__.count += 1
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if not queue:
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queue = Queue.Queue()
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threading.Thread.__init__(self, name=name)
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self.queue = queue
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self.daemon = True
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self.received_task_event = threading.Event()
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self.done_event = threading.Event()
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self.exception_event = threading.Event()
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self.continue_event = threading.Event()
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self.exception_callback = exception_callback
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self.exc_info = None
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self._running = True
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self.start()
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def run(self):
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while self._running:
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try:
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task, args, kwargs = self.queue.get(block=True, timeout=.5)
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self.continue_event.clear()
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self.received_task_event.clear()
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self.done_event.clear()
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self.exception_event.clear()
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logger.debug("Received task")
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self.received_task_event.set()
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task(*args, **kwargs)
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logger.debug("Task complete")
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self.done_event.set()
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except Queue.Empty:
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pass
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except Exception as e:
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logger.error(type(e).__name__ + " occurred, args=" + str(e.args) + "\n" + traceback.format_exc())
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self.exc_info = sys.exc_info()
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self.exception_event.set()
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if self.exception_callback:
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self.exception_callback(self, self.exc_info)
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self.continue_event.wait()
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def put(self, task, *args, **kwargs):
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self.queue.put((task, args, kwargs))
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def raise_exceptions(self):
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if self.exception_event.is_set():
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six.reraise(self.exc_info[0], self.exc_info[1], self.exc_info[2])
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def clear_exceptions(self):
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self.exception_event.clear()
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self.continue_event.set()
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def stop(self):
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self._running = False
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class ThreadPool:
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def __init__(self, num_threads=2):
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self.tasks = Queue.Queue()
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self.workers = [WorkerThread(self.on_exception, self.tasks) for _ in range(num_threads)]
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self.num_threads = num_threads
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self.exception_event = threading.Event()
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self.exc_info = None
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def put(self, func, *args, **kwargs):
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self.tasks.put((func, args, kwargs))
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def on_exception(self, worker_thread, exc_info):
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self.exc_info = exc_info
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self.exception_event.set()
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worker_thread.continue_event.set()
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def raise_exceptions(self):
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if self.exception_event.is_set():
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six.reraise(self.exc_info[0], self.exc_info[1], self.exc_info[2])
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def clear_exceptions(self):
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self.exception_event.clear()
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def close(self):
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for worker in self.workers:
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worker.stop()
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for worker in self.workers:
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worker.join()
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class AsyncTask:
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def __init__(self, target, *args, **kwargs):
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self.target = target
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self.args = args
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self.kwargs = kwargs
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self.done = False
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self.thread = threading.Thread(target=self._run)
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self.thread.start()
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def _run(self):
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try:
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self.result = self.target(*self.args, **self.kwargs)
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except:
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self.result = sys.exc_info()
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self.done = True
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def wait(self):
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if not self.done:
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self.thread.join()
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if isinstance(self.result, BaseException):
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six.reraise(self.result[0], self.result[1], self.result[2])
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else:
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return self.result
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def async_dec():
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def decorator(fn):
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def wrapper(*args, **kwargs):
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return AsyncTask(fn, *args, **kwargs)
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return wrapper
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return decorator
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def is_string(var):
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return isinstance(var, string_types)
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def is_command(text):
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"""
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Checks if `text` is a command. Telegram chat commands start with the '/' character.
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:param text: Text to check.
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:return: True if `text` is a command, else False.
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"""
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return text.startswith('/')
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def extract_command(text):
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"""
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Extracts the command from `text` (minus the '/') if `text` is a command (see is_command).
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If `text` is not a command, this function returns None.
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Examples:
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extract_command('/help'): 'help'
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extract_command('/help@BotName'): 'help'
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extract_command('/search black eyed peas'): 'search'
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extract_command('Good day to you'): None
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:param text: String to extract the command from
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:return: the command if `text` is a command (according to is_command), else None.
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"""
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return text.split()[0].split('@')[0][1:] if is_command(text) else None
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def split_string(text, chars_per_string):
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"""
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Splits one string into multiple strings, with a maximum amount of `chars_per_string` characters per string.
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This is very useful for splitting one giant message into multiples.
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:param text: The text to split
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:param chars_per_string: The number of characters per line the text is split into.
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:return: The splitted text as a list of strings.
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"""
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return [text[i:i + chars_per_string] for i in range(0, len(text), chars_per_string)]
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# CREDITS TO http://stackoverflow.com/questions/12317940#answer-12320352
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def or_set(self):
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self._set()
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self.changed()
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def or_clear(self):
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self._clear()
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self.changed()
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def orify(e, changed_callback):
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e._set = e.set
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e._clear = e.clear
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e.changed = changed_callback
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e.set = lambda: or_set(e)
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e.clear = lambda: or_clear(e)
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def OrEvent(*events):
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or_event = threading.Event()
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def changed():
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bools = [e.is_set() for e in events]
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if any(bools):
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or_event.set()
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else:
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or_event.clear()
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def busy_wait():
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while not or_event.is_set():
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or_event._wait(3)
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for e in events:
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orify(e, changed)
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or_event._wait = or_event.wait
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or_event.wait = busy_wait
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changed()
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return or_event
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def extract_arguments(text):
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"""
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Returns the argument after the command.
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Examples:
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extract_arguments("/get name"): 'name'
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extract_arguments("/get"): ''
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extract_arguments("/get@botName name"): 'name'
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:param text: String to extract the arguments from a command
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:return: the arguments if `text` is a command (according to is_command), else None.
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"""
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regexp = re.compile("/\w*(@\w*)*\s*([\s\S]*)",re.IGNORECASE)
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result = regexp.match(text)
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return result.group(2) if is_command(text) else None
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def per_thread(key, construct_value):
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try:
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return getattr(thread_local, key)
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except AttributeError:
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value = construct_value()
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setattr(thread_local, key, value)
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return value
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def generate_random_token():
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return ''.join(random.sample(string.ascii_letters, 16)) |