145 lines
4.7 KiB
Python
145 lines
4.7 KiB
Python
# Nemubot is a smart and modulable IM bot.
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# Copyright (C) 2012-2015 Mercier Pierre-Olivier
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import logging
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logger = logging.getLogger("nemubot.treatment")
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class MessageTreater:
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"""Treat a message"""
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def __init__(self):
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from nemubot.hooks.manager import HooksManager
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self.hm = HooksManager()
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def treat_msg(self, msg):
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"""Treat a given message
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Arguments:
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msg -- the message to treat
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"""
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try:
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# Run pre-treatment: from Message to [ Message ]
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msg_gen = self._pre_treat(msg)
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m = next(msg_gen, None)
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# Run in-treatment: from Message to [ Response ]
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while m is not None:
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for response in self._in_treat(m):
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# Run post-treatment: from Response to [ Response ]
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yield from self._post_treat(response)
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m = next(msg_gen, None)
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except BaseException as e:
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logger.exception("Error occurred during the processing of the %s: "
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"%s", type(msg).__name__, msg)
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from nemubot.message import Text
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yield from self._post_treat(Text("Sorry, an error occured (%s). Feel free to open a new issue at https://github.com/nemunaire/nemubot/issues/new" % type(e).__name__,
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to=msg.to_response))
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def _pre_treat(self, msg):
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"""Modify input Messages
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Arguments:
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msg -- message to treat
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"""
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for h in self.hm.get_hooks("pre", type(msg).__name__):
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if h.can_read(msg.to, msg.server) and h.match(msg):
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res = h.run(msg)
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if isinstance(res, list):
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for i in range(len(res)):
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# Avoid infinite loop
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if res[i] != msg:
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yield from self._pre_treat(res[i])
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elif res is not None and res != msg:
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yield from self._pre_treat(res)
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elif res is None or res is False:
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break
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else:
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yield msg
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def _in_treat(self, msg):
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"""Treats Messages and returns Responses
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Arguments:
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msg -- message to treat
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"""
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res = False
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hooks = self.hm.get_hooks("in", type(msg).__name__)
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for h in hooks:
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if h.can_read(msg.to, msg.server) and h.match(msg):
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res = h.run(msg)
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if isinstance(res, list):
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for r in res:
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yield r
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elif res is not None:
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if not hasattr(res, "server") or res.server is None:
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res.server = msg.server
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yield res
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from nemubot.message.command import Command as CommandMessage
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if res is False and isinstance(msg, CommandMessage):
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from nemubot.hooks import Command as CommandHook
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from nemubot.exception import IMException
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from nemubot.tools.human import guess
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suggest = [s for s in guess(msg.cmd, [h.name for h in hooks if isinstance(h, CommandHook) and h.name is not None])]
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if len(suggest) >= 1:
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yield IMException("Unknown command %s. Would you mean: %s?" % (msg.cmd, ", ".join(suggest))).fill_response(msg)
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def _post_treat(self, msg):
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"""Modify output Messages
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Arguments:
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msg -- response to treat
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"""
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for h in self.hm.get_hooks("post"):
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if h.can_write(msg.to, msg.server) and h.match(msg):
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res = h.run(msg)
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if isinstance(res, list):
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for i in range(len(res)):
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# Avoid infinite loop
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if res[i] != msg:
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yield from self._post_treat(res[i])
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elif res is not None and res != msg:
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yield from self._post_treat(res)
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elif res is None or res is False:
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break
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else:
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yield msg
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