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268 lines
9.6 KiB
Python
268 lines
9.6 KiB
Python
#!/usr/bin/env python
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###
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# Copyright (c) 2002, Jeremiah Fincher
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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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"""
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Allows 'aliases' for other commands.
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"""
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import plugins
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import os
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import re
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import sets
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import types
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import conf
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import debug
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import utils
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import privmsgs
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import callbacks
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import structures
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def configure(onStart, afterConnect, advanced):
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# This will be called by setup.py to configure this module. onStart and
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# afterConnect are both lists. Append to onStart the commands you would
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# like to be run when the bot is started; append to afterConnect the
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# commands you would like to be run when the bot has finished connecting.
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from questions import expect, anything, something, yn
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onStart.append('load Alias')
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class AliasError(Exception):
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pass
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class RecursiveAlias(AliasError):
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pass
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def findAliasCommand(s, alias):
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s = re.escape(s)
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r = re.compile(r'(?:(^|\[)\s*\b%s\b|\|\s*\b%s\b)' % (s, s))
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return bool(r.search(alias))
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dollarRe = re.compile(r'\$(\d+)')
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def findBiggestDollar(alias):
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dollars = dollarRe.findall(alias)
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dollars = map(int, dollars)
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dollars.sort()
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if dollars:
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return dollars[-1]
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else:
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return 0
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atRe = re.compile(r'@(\d+)')
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def findBiggestAt(alias):
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ats = atRe.findall(alias)
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ats = map(int, ats)
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ats.sort()
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if ats:
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return ats[-1]
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else:
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return 0
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def makeNewAlias(name, alias):
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original = alias
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if findAliasCommand(name, alias):
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raise RecursiveAlias
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biggestDollar = findBiggestDollar(original)
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biggestAt = findBiggestAt(original)
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wildcard = '$*' in original
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if biggestAt and wildcard:
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raise AliasError, 'Can\'t mix $* and optional args (@1, etc.)'
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if original.count('$*') > 1:
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raise AliasError, 'There can be only one $* in an alias.'
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def f(self, irc, msg, args):
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alias = original.replace('$nick', msg.nick)
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if '$channel' in original:
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channel = privmsgs.getChannel(msg, args)
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alias = alias.replace('$channel', channel)
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tokens = callbacks.tokenize(alias)
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if not wildcard and biggestDollar or biggestAt:
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args = privmsgs.getArgs(args,
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required=biggestDollar,
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optional=biggestAt)
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# Gotta have a mutable sequence (for replace).
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if biggestDollar + biggestAt == 1: # We got a string, no tuple.
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args = [args]
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def regexpReplace(m):
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idx = int(m.group(1))
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return args[idx-1]
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def replace(tokens, replacer):
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for (i, token) in enumerate(tokens):
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if isinstance(token, list):
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replace(token, replacer)
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else:
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tokens[i] = replacer(token)
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replace(tokens, lambda s: dollarRe.sub(regexpReplace, s))
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if biggestAt:
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assert not wildcard
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args = args[biggestDollar:]
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replace(tokens, lambda s: atRe.sub(regexpReplace, s))
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if wildcard:
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assert not biggestAt
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# Gotta remove the things that have already been subbed in.
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i = biggestDollar
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while i:
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args.pop(0)
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i -= 1
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def everythingReplace(tokens):
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for (i, token) in enumerate(tokens):
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if isinstance(token, list):
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if everythingReplace(token):
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return
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if token == '$*':
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tokens[i:i+1] = args
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return True
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elif '$*' in token:
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tokens[i] = token.replace('$*', ' '.join(args))
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return True
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return False
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everythingReplace(tokens)
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self.Proxy(irc.irc, msg, tokens)
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f = types.FunctionType(f.func_code, f.func_globals,
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name, closure=f.func_closure)
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f.__doc__ ='<an alias, %s>\n\nAlias for %r' % \
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(utils.nItems(biggestDollar, 'argument'), alias)
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return f
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class Alias(callbacks.Privmsg):
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def __init__(self):
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callbacks.Privmsg.__init__(self)
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filename = os.path.join(conf.dataDir, 'Aliases.db')
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# Schema: {name: [alias, frozen]}
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self.aliases = structures.PersistentDictionary(filename)
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def __call__(self, irc, msg):
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# Adding the aliases requires an Irc. So the first time we get called
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# with an Irc, we add our aliases and then delete ourselves :)
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for (name, (alias, frozen)) in self.aliases.iteritems():
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self.addAlias(irc, name, alias, frozen)
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del self.__class__.__call__
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def die(self):
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self.aliases.close()
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def freeze(self, irc, msg, args):
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"""<alias>
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'Freezes' an alias so that no one else can change it.
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"""
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name = privmsgs.getArgs(args)
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name = callbacks.canonicalName(name)
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if hasattr(self, name) and self.isCommand(name):
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self.aliases[name][1] = True
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irc.reply(msg, conf.replySuccess)
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else:
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irc.error(msg, 'There is no such alias.')
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freeze = privmsgs.checkCapability(freeze, 'admin')
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def unfreeze(self, irc, msg, args):
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"""<alias>
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'Unfreezes' an alias so that people can define new aliases over it.
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"""
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name = privmsgs.getArgs(args)
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name = callbacks.canonicalName(name)
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if hasattr(self, name) and self.isCommand(name):
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self.aliases[name][1] = False
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irc.reply(msg, conf.replySuccess)
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else:
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irc.error(msg, 'There is no such alias.')
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unfreeze = privmsgs.checkCapability(unfreeze, 'admin')
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_invalidCharsRe = re.compile(r'[\[\]\s]')
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def addAlias(self, irc, name, alias, freeze=False):
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if self._invalidCharsRe.search(name):
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raise AliasError, 'Names cannot contain spaces or square brackets.'
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if conf.enablePipeSyntax and '|' in name:
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raise AliasError, 'Names cannot contain pipes.'
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realName = callbacks.canonicalName(name)
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if name != realName:
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s = 'That name isn\'t valid. Try %r instead.' % realName
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raise AliasError, s
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name = realName
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cbs = callbacks.findCallbackForCommand(irc, name)
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if [cb for cb in cbs if cb != self]:
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s = 'A command with the name %r already exists.' % name
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raise AliasError, s
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if name in self.aliases:
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(currentAlias, frozen) = self.aliases[name]
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if frozen and currentAlias != alias:
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raise AliasError, 'Alias %r is frozen.' % name
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try:
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f = makeNewAlias(name, alias)
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except RecursiveAlias:
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raise AliasError, 'You can\'t define a recursive alias.'
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setattr(self.__class__, name, f)
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self.aliases[name] = [alias, freeze]
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def removeAlias(self, name, evenIfFrozen=False):
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name = callbacks.canonicalName(name)
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if hasattr(self, name) and self.isCommand(name):
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if evenIfFrozen or not self.aliases[name][1]:
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delattr(self.__class__, name)
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del self.aliases[name]
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else:
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raise AliasError, 'That alias is frozen.'
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else:
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raise AliasError, 'There is no such alias.'
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def add(self, irc, msg, args):
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"""<name> <alias commands>
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Defines an alias <name> for the commands <commands>. The <commands>
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should be in the standard [command argument [nestedcommand argument]]
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format. Underscores can be used to represent arguments to the alias
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itself; for instance ...
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"""
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(name, alias) = privmsgs.getArgs(args, required=2)
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try:
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self.addAlias(irc, name, alias)
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irc.reply(msg, conf.replySuccess)
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except AliasError, e:
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irc.error(msg, str(e))
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def remove(self, irc, msg, args):
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"""<name>
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Removes the given alias, if unfrozen.
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"""
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name = privmsgs.getArgs(args)
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try:
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self.removeAlias(name)
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irc.reply(msg, conf.replySuccess)
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except AliasError, e:
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irc.error(msg, str(e))
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Class = Alias
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# vim:set shiftwidth=4 tabstop=8 expandtab textwidth=78:
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