894adb1e43
This will make it convenient to include these bots in Zulip API releases on pypi. Fix #5009.
115 lines
4.2 KiB
Python
115 lines
4.2 KiB
Python
from random import randint
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import logging
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import requests
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XKCD_TEMPLATE_URL = 'https://xkcd.com/%s/info.0.json'
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LATEST_XKCD_URL = 'https://xkcd.com/info.0.json'
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class XkcdHandler(object):
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'''
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This plugin provides several commands that can be used for fetch a comic
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strip from https://xkcd.com. The bot looks for messages starting with
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"@mention-bot" and responds with a message with the comic based on provided
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commands.
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'''
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def usage(self):
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return '''
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This plugin allows users to fetch a comic strip provided by
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https://xkcd.com. Users should preface the command with "@mention-bot".
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There are several commands to use this bot:
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- @mention-bot help -> To show all commands the bot supports.
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- @mention-bot latest -> To fetch the latest comic strip from xkcd.
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- @mention-bot random -> To fetch a random comic strip from xkcd.
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- @mention-bot <comic_id> -> To fetch a comic strip based on
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`<comic_id>`, e.g `@mention-bot 1234`.
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'''
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def handle_message(self, message, client, state_handler):
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xkcd_bot_response = get_xkcd_bot_response(message)
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client.send_reply(message, xkcd_bot_response)
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class XkcdBotCommand(object):
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LATEST = 0
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RANDOM = 1
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COMIC_ID = 2
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class XkcdNotFoundError(Exception):
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pass
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class XkcdServerError(Exception):
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pass
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def get_xkcd_bot_response(message):
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original_content = message['content'].strip()
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command = original_content.strip()
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commands_help = ("%s"
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"\n* `@xkcd help` to show this help message."
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"\n* `@xkcd latest` to fetch the latest comic strip from xkcd."
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"\n* `@xkcd random` to fetch a random comic strip from xkcd."
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"\n* `@xkcd <comic id>` to fetch a comic strip based on `<comic id>` "
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"e.g `@xkcd 1234`.")
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try:
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if command == 'help':
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return commands_help % ('xkcd bot supports these commands:')
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elif command == 'latest':
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fetched = fetch_xkcd_query(XkcdBotCommand.LATEST)
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elif command == 'random':
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fetched = fetch_xkcd_query(XkcdBotCommand.RANDOM)
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elif command.isdigit():
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fetched = fetch_xkcd_query(XkcdBotCommand.COMIC_ID, command)
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else:
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return commands_help % ('xkcd bot only supports these commands:')
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except (requests.exceptions.ConnectionError, XkcdServerError):
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logging.exception('Connection error occurred when trying to connect to xkcd server')
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return 'Sorry, I cannot process your request right now, please try again later!'
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except XkcdNotFoundError:
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logging.exception('XKCD server responded 404 when trying to fetch comic with id %s'
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% (command))
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return 'Sorry, there is likely no xkcd comic strip with id: #%s' % (command,)
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else:
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return ("#%s: **%s**\n[%s](%s)" % (fetched['num'],
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fetched['title'],
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fetched['alt'],
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fetched['img']))
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def fetch_xkcd_query(mode, comic_id=None):
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try:
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if mode == XkcdBotCommand.LATEST: # Fetch the latest comic strip.
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url = LATEST_XKCD_URL
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elif mode == XkcdBotCommand.RANDOM: # Fetch a random comic strip.
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latest = requests.get(LATEST_XKCD_URL)
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if latest.status_code != 200:
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raise XkcdServerError()
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latest_id = latest.json()['num']
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random_id = randint(1, latest_id)
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url = XKCD_TEMPLATE_URL % (str(random_id))
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elif mode == XkcdBotCommand.COMIC_ID: # Fetch specific comic strip by id number.
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if comic_id is None:
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raise Exception('Missing comic_id argument')
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url = XKCD_TEMPLATE_URL % (comic_id)
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fetched = requests.get(url)
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if fetched.status_code == 404:
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raise XkcdNotFoundError()
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elif fetched.status_code != 200:
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raise XkcdServerError()
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xkcd_json = fetched.json()
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except requests.exceptions.ConnectionError as e:
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logging.warning(e)
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raise
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return xkcd_json
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handler_class = XkcdHandler
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