Limnoria/plugins/Alias.py
2003-11-25 08:23:47 +00:00

275 lines
9.9 KiB
Python

#!/usr/bin/env python
###
# Copyright (c) 2002, Jeremiah Fincher
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions, and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions, and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of the author of this software nor the name of
# contributors to this software may be used to endorse or promote products
# derived from this software without specific prior written consent.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
###
"""
Allows 'aliases' for other commands.
"""
__revision__ = "$Id$"
import plugins
import os
import re
import sets
import types
import conf
import debug
import utils
import privmsgs
import callbacks
import structures
def configure(onStart, afterConnect, advanced):
# This will be called by setup.py to configure this module. onStart and
# afterConnect are both lists. Append to onStart the commands you would
# like to be run when the bot is started; append to afterConnect the
# commands you would like to be run when the bot has finished connecting.
from questions import expect, anything, something, yn
onStart.append('load Alias')
class AliasError(Exception):
pass
class RecursiveAlias(AliasError):
pass
def findAliasCommand(s, alias):
s = re.escape(s)
r = re.compile(r'(?:(^|\[)\s*\b%s\b|\|\s*\b%s\b)' % (s, s))
return bool(r.search(alias))
dollarRe = re.compile(r'\$(\d+)')
def findBiggestDollar(alias):
dollars = dollarRe.findall(alias)
dollars = map(int, dollars)
dollars.sort()
if dollars:
return dollars[-1]
else:
return 0
atRe = re.compile(r'@(\d+)')
def findBiggestAt(alias):
ats = atRe.findall(alias)
ats = map(int, ats)
ats.sort()
if ats:
return ats[-1]
else:
return 0
def makeNewAlias(name, alias):
original = alias
if findAliasCommand(name, alias):
raise RecursiveAlias
biggestDollar = findBiggestDollar(original)
biggestAt = findBiggestAt(original)
wildcard = '$*' in original
if biggestAt and wildcard:
raise AliasError, 'Can\'t mix $* and optional args (@1, etc.)'
if original.count('$*') > 1:
raise AliasError, 'There can be only one $* in an alias.'
def f(self, irc, msg, args):
alias = original.replace('$nick', msg.nick)
if '$channel' in original:
channel = privmsgs.getChannel(msg, args)
alias = alias.replace('$channel', channel)
tokens = callbacks.tokenize(alias)
if not wildcard and biggestDollar or biggestAt:
args = privmsgs.getArgs(args,
required=biggestDollar,
optional=biggestAt)
# Gotta have a mutable sequence (for replace).
if biggestDollar + biggestAt == 1: # We got a string, no tuple.
args = [args]
def regexpReplace(m):
idx = int(m.group(1))
return args[idx-1]
def replace(tokens, replacer):
for (i, token) in enumerate(tokens):
if isinstance(token, list):
replace(token, replacer)
else:
tokens[i] = replacer(token)
replace(tokens, lambda s: dollarRe.sub(regexpReplace, s))
if biggestAt:
assert not wildcard
args = args[biggestDollar:]
replace(tokens, lambda s: atRe.sub(regexpReplace, s))
if wildcard:
assert not biggestAt
# Gotta remove the things that have already been subbed in.
i = biggestDollar
while i:
args.pop(0)
i -= 1
def everythingReplace(tokens):
for (i, token) in enumerate(tokens):
if isinstance(token, list):
if everythingReplace(token):
return
if token == '$*':
tokens[i:i+1] = args
return True
elif '$*' in token:
tokens[i] = token.replace('$*', ' '.join(args))
return True
return False
everythingReplace(tokens)
Owner = irc.getCallback('Owner')
Owner.disambiguate(irc, tokens)
self.Proxy(irc.irc, msg, tokens)
f = types.FunctionType(f.func_code, f.func_globals,
name, closure=f.func_closure)
f.__doc__ ='<an alias, %s>\n\nAlias for %r' % \
(utils.nItems(biggestDollar, 'argument'), alias)
return f
class Alias(callbacks.Privmsg):
def __init__(self):
callbacks.Privmsg.__init__(self)
filename = os.path.join(conf.dataDir, 'Aliases.db')
# Schema: {name: [alias, frozen]}
self.aliases = structures.PersistentDictionary(filename)
def __call__(self, irc, msg):
# Adding the aliases requires an Irc. So the first time we get called
# with an Irc, we add our aliases and then delete ourselves :)
for (name, (alias, frozen)) in self.aliases.iteritems():
self.addAlias(irc, name, alias, frozen)
del self.__class__.__call__
def die(self):
self.aliases.close()
def freeze(self, irc, msg, args):
"""<alias>
'Freezes' an alias so that no one else can change it.
"""
name = privmsgs.getArgs(args)
name = callbacks.canonicalName(name)
if hasattr(self, name) and self.isCommand(name):
self.aliases[name][1] = True
irc.reply(msg, conf.replySuccess)
else:
irc.error(msg, 'There is no such alias.')
freeze = privmsgs.checkCapability(freeze, 'admin')
def unfreeze(self, irc, msg, args):
"""<alias>
'Unfreezes' an alias so that people can define new aliases over it.
"""
name = privmsgs.getArgs(args)
name = callbacks.canonicalName(name)
if hasattr(self, name) and self.isCommand(name):
self.aliases[name][1] = False
irc.reply(msg, conf.replySuccess)
else:
irc.error(msg, 'There is no such alias.')
unfreeze = privmsgs.checkCapability(unfreeze, 'admin')
_invalidCharsRe = re.compile(r'[\[\]\s]')
def addAlias(self, irc, name, alias, freeze=False):
if self._invalidCharsRe.search(name):
raise AliasError, 'Names cannot contain spaces or square brackets.'
if conf.enablePipeSyntax and '|' in name:
raise AliasError, 'Names cannot contain pipes.'
realName = callbacks.canonicalName(name)
if name != realName:
s = 'That name isn\'t valid. Try %r instead.' % realName
raise AliasError, s
name = realName
cbs = callbacks.findCallbackForCommand(irc, name)
if [cb for cb in cbs if cb != self]:
s = 'A command with the name %r already exists.' % name
raise AliasError, s
if name in self.aliases:
(currentAlias, frozen) = self.aliases[name]
if frozen and currentAlias != alias:
raise AliasError, 'Alias %r is frozen.' % name
try:
f = makeNewAlias(name, alias)
except RecursiveAlias:
raise AliasError, 'You can\'t define a recursive alias.'
setattr(self.__class__, name, f)
self.aliases[name] = [alias, freeze]
def removeAlias(self, name, evenIfFrozen=False):
name = callbacks.canonicalName(name)
if hasattr(self, name) and self.isCommand(name):
if evenIfFrozen or not self.aliases[name][1]:
delattr(self.__class__, name)
del self.aliases[name]
else:
raise AliasError, 'That alias is frozen.'
else:
raise AliasError, 'There is no such alias.'
def add(self, irc, msg, args):
"""<name> <alias>
Defines an alias <name> that executes <alias>. The <alias>
should be in the standard "command argument [nestedcommand argument]"
format. $[digit] (like $1, $2, etc.) can be used to represent
arguments to the alias; they'll be filled with the first, second, etc.
arguments. @1, @2 can be used for optional arguments. $* simply
means "all remaining arguments," and cannot be combined with optional
arguments.
"""
(name, alias) = privmsgs.getArgs(args, required=2)
try:
self.addAlias(irc, name, alias)
irc.reply(msg, conf.replySuccess)
except AliasError, e:
irc.error(msg, str(e))
def remove(self, irc, msg, args):
"""<name>
Removes the given alias, if unfrozen.
"""
name = privmsgs.getArgs(args)
try:
self.removeAlias(name)
irc.reply(msg, conf.replySuccess)
except AliasError, e:
irc.error(msg, str(e))
Class = Alias
# vim:set shiftwidth=4 tabstop=8 expandtab textwidth=78: