mirror of
https://github.com/Mikaela/Limnoria.git
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256 lines
10 KiB
Python
256 lines
10 KiB
Python
###
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# Copyright (c) 2015, Michael Daniel Telatynski <postmaster@webdevguru.co.uk>
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# Copyright (c) 2015-2020, James Lu <james@overdrivenetworks.com>
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# Copyright (c) 2020-2021, Valentin Lorentz
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright notice,
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# this list of conditions, and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions, and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# * Neither the name of the author of this software nor the name of
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# contributors to this software may be used to endorse or promote products
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# derived from this software without specific prior written consent.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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###
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from supybot.commands import *
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from supybot.commands import ProcessTimeoutError
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import supybot.plugins as plugins
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import supybot.ircmsgs as ircmsgs
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import supybot.callbacks as callbacks
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import supybot.ircutils as ircutils
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import supybot.ircdb as ircdb
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import supybot.utils as utils
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import re
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import sys
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try:
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from supybot.i18n import PluginInternationalization
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_ = PluginInternationalization('SedRegex')
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except ImportError:
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_ = lambda x: x
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from .constants import SED_REGEX, TAG_SEEN, TAG_IS_REGEX
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# Replace newlines and friends with things like literal "\n" (backslash and "n")
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axe_spaces = utils.str.MultipleReplacer({'\n': '\\n', '\t': '\\t', '\r': '\\r'})
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class SearchNotFoundError(Exception):
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pass
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class SedRegex(callbacks.PluginRegexp):
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"""
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Enable SedRegex on the desired channels:
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``config channel #yourchannel plugins.sedregex.enable True``
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After enabling SedRegex, typing a regex in the form
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``s/text/replacement/`` will make the bot announce replacements.
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::
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20:24 <jlu5> helli world
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20:24 <jlu5> s/i/o/
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20:24 <Limnoria> jlu5 meant to say: hello world
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You can also do ``othernick: s/text/replacement/`` to only replace
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messages from a certain user. Supybot ignores are respected by the plugin,
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and messages from ignored users will only be considered if their nick is
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explicitly given.
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Regex flags
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^^^^^^^^^^^
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The following regex flags (i.e. the ``g`` in ``s/abc/def/g``, etc.) are
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supported:
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- ``i``: case insensitive replacement
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- ``g``: replace all occurences of the original text
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- ``s``: *(custom flag specific to this plugin)* replace only messages
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from the caller
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"""
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threaded = True
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public = True
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unaddressedRegexps = ['replacer']
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flags = 0 # Make callback matching case sensitive
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@staticmethod
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def _unpack_sed(expr):
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if '\0' in expr:
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raise ValueError('Expression can\'t contain NUL')
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delim = expr[1]
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escaped_expr = ''
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for (i, c) in enumerate(expr):
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if c == delim and i > 0:
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if expr[i - 1] == '\\':
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escaped_expr = escaped_expr[:-1] + '\0'
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continue
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escaped_expr += c
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match = SED_REGEX.search(escaped_expr)
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if not match:
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return
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groups = match.groupdict()
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pattern = groups['pattern'].replace('\0', delim)
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replacement = groups['replacement'].replace('\0', delim)
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if groups['flags']:
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raw_flags = set(groups['flags'])
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else:
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raw_flags = set()
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flags = 0
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count = 1
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for flag in raw_flags:
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if flag == 'g':
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count = 0
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if flag == 'i':
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flags |= re.IGNORECASE
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pattern = re.compile(pattern, flags)
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return (pattern, replacement, count, raw_flags)
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# Tag all messages that SedRegex has seen before. This slightly optimizes the ignoreRegex
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# feature as all messages tagged with SedRegex.seen but not SedRegex.isRegex is NOT a regexp.
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# If we didn't have this tag, we'd have to run a regexp match on each message in the history
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# to check if it's a regexp, as there could've been regexp-like messages sent before
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# SedRegex was enabled.
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def doNotice(self, irc, msg):
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if self.registryValue('enable', msg.channel, irc.network):
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msg.tag(TAG_SEEN)
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def doPrivmsg(self, irc, msg):
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# callbacks.PluginRegexp works by defining doPrivmsg(), we don't want to overwrite
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# its behaviour
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super().doPrivmsg(irc, msg)
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self.doNotice(irc, msg)
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# SedRegex main routine. This is called automatically by callbacks.PluginRegexp on every
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# message that matches the SED_REGEX expression defined in constants.py
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# The actual regexp is passed into PluginRegexp by setting __doc__ equal to the regexp.
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def replacer(self, irc, msg, regex):
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if not self.registryValue('enable', msg.channel, irc.network):
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return
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self.log.debug("SedRegex: running on %s/%s for %s", irc.network, msg.channel, regex)
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iterable = reversed(irc.state.history)
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msg.tag(TAG_IS_REGEX)
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try:
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(pattern, replacement, count, flags) = self._unpack_sed(msg.args[1])
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except Exception as e:
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self.log.warning(_("SedRegex parser error: %s"), e, exc_info=True)
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if self.registryValue('displayErrors', msg.channel, irc.network):
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irc.error('%s.%s: %s' % (e.__class__.__module__, e.__class__.__name__, e))
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return
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next(iterable)
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if 's' in flags: # Special 's' flag lets the bot only look at self messages
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target = msg.nick
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else:
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target = regex.group('nick')
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if not ircutils.isNick(str(target)):
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return
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regex_timeout = self.registryValue('processTimeout')
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try:
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message = process(self._replacer_process, irc, msg,
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target, pattern, replacement, count, iterable,
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timeout=regex_timeout, pn=self.name(), cn='replacer')
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except ProcessTimeoutError:
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irc.error(_("Search timed out."))
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except SearchNotFoundError:
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irc.error(_("Search not found in the last %i IRC messages on this network.") %
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len(irc.state.history))
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except Exception as e:
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self.log.warning(_("SedRegex replacer error: %s"), e, exc_info=True)
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if self.registryValue('displayErrors', msg.channel, irc.network):
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irc.error('%s.%s: %s' % (e.__class__.__module__,
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e.__class__.__name__, e))
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else:
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irc.reply(message, prefixNick=False)
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replacer.__doc__ = SED_REGEX.pattern
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def _replacer_process(self, irc, msg, target, pattern, replacement, count, messages):
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for m in messages:
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if m.command in ('PRIVMSG', 'NOTICE') and \
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ircutils.strEqual(m.args[0], msg.args[0]) and m.tagged('receivedBy') == irc:
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if target and m.nick != target:
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continue
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# Don't snarf ignored users' messages unless specifically
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# told to.
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if ircdb.checkIgnored(m.prefix) and not target:
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continue
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# When running substitutions, ignore the "* nick" part of any actions.
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action = ircmsgs.isAction(m)
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if action:
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text = ircmsgs.unAction(m)
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else:
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text = m.args[1]
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# Test messages sent before SedRegex was activated. Mark them all as seen
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# so we only need to do this check once per message.
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if not m.tagged(TAG_SEEN):
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m.tag(TAG_SEEN)
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if SED_REGEX.match(m.args[1]):
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m.tag(TAG_IS_REGEX)
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# Ignore messages containing a regexp if ignoreRegex is on.
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if self.registryValue('ignoreRegex', msg.channel, irc.network) and m.tagged(TAG_IS_REGEX):
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self.log.debug("Skipping message %s because it is tagged as isRegex", m.args[1])
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continue
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if m.nick == msg.nick:
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messageprefix = msg.nick
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else:
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messageprefix = '%s thinks %s' % (msg.nick, m.nick)
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try:
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replace_result = pattern.search(text)
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if replace_result:
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if self.registryValue('boldReplacementText',
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msg.channel, irc.network):
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replacement = ircutils.bold(replacement)
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subst = pattern.sub(replacement, text, count)
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if action: # If the message was an ACTION, prepend the nick back.
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subst = '* %s %s' % (m.nick, subst)
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subst = axe_spaces(subst)
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return _("%s meant to say: %s") % \
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(messageprefix, subst)
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except Exception as e:
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self.log.warning(_("SedRegex error: %s"), e, exc_info=True)
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raise
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self.log.debug(_("SedRegex: Search %r not found in the last %i messages of %s."),
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msg.args[1], len(irc.state.history), msg.args[0])
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raise SearchNotFoundError()
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Class = SedRegex
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# vim:set shiftwidth=4 softtabstop=4 expandtab textwidth=79:
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