Limnoria/plugins/Alias.py

268 lines
9.6 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.
"""
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)
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 commands>
Defines an alias <name> for the commands <commands>. The <commands>
should be in the standard [command argument [nestedcommand argument]]
format. Underscores can be used to represent arguments to the alias
itself; for instance ...
"""
(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: