Limnoria/plugins/Aka/plugin.py

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###
# Copyright (c) 2013, Valentin Lorentz
# 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.
###
import re
import os
import sys
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import datetime
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import supybot.utils as utils
import supybot.ircdb as ircdb
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from supybot.commands import *
import supybot.plugins as plugins
import supybot.ircutils as ircutils
import supybot.callbacks as callbacks
from supybot.i18n import PluginInternationalization
_ = PluginInternationalization('Aka')
try:
import sqlalchemy
import sqlalchemy.ext
import sqlalchemy.ext.declarative
except ImportError:
sqlalchemy = None
if sqlalchemy:
Base = sqlalchemy.ext.declarative.declarative_base()
class Alias(Base):
__tablename__ = 'aliases'
id = sqlalchemy.Column(sqlalchemy.Integer, primary_key=True)
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name = sqlalchemy.Column(sqlalchemy.String, unique=True, nullable=False)
alias = sqlalchemy.Column(sqlalchemy.String, nullable=False)
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locked = sqlalchemy.Column(sqlalchemy.Boolean, nullable=False)
locked_by = sqlalchemy.Column(sqlalchemy.String, nullable=True)
locked_at = sqlalchemy.Column(sqlalchemy.DateTime, nullable=True)
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def __init__(self, name, alias):
self.name = name
self.alias = alias
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self.locked = False
self.locked_by = None
self.locked_at = None
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def __repr__(self):
return "<Alias('%r', '%r')>" % (self.name, self.alias)
# TODO: Add table for usage statistics
class SqlAlchemyAkaDB(object):
def __init__(self, filename):
self.engines = ircutils.IrcDict()
self.filename = filename
self.sqlalchemy = sqlalchemy
def close(self):
self.dbs.clear()
def get_db(self, channel):
if channel in self.engines:
engine = self.engines[channel]
else:
filename = plugins.makeChannelFilename(self.filename, channel)
exists = os.path.exists(filename)
engine = sqlalchemy.create_engine('sqlite:///' + filename)
if not exists:
Base.metadata.create_all(engine)
self.engines[channel] = engine
assert engine.execute("select 1").scalar() == 1
Session = sqlalchemy.orm.sessionmaker()
Session.configure(bind=engine)
return Session()
def has_aka(self, channel, name):
if sys.version_info[0] < 3 and isinstance(name, str):
name = name.decode('utf8')
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count = self.get_db(channel).query(Alias) \
.filter(Alias.name == name) \
.count()
return bool(count)
def get_aka_list(self, channel):
list_ = list(self.get_db(channel).query(Alias.name))
return list_
def get_alias(self, channel, name):
if sys.version_info[0] < 3 and isinstance(name, str):
name = name.decode('utf8')
try:
return self.get_db(channel).query(Alias.alias) \
.filter(Alias.name == name).one()[0]
except sqlalchemy.orm.exc.NoResultFound:
return None
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def add_aka(self, channel, name, alias):
if self.has_aka(channel, name):
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raise AkaError(_('This Aka already exists.'))
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if sys.version_info[0] < 3:
if isinstance(name, str):
name = name.decode('utf8')
if isinstance(alias, str):
alias = alias.decode('utf8')
db = self.get_db(channel)
db.add(Alias(name, alias))
db.commit()
def remove_aka(self, channel, name):
if sys.version_info[0] < 3 and isinstance(name, str):
name = name.decode('utf8')
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db = self.get_db(channel)
db.query(Alias).filter(Alias.name == name).delete()
db.commit()
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def lock_aka(self, channel, name, by):
if sys.version_info[0] < 3 and isinstance(name, str):
name = name.decode('utf8')
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db = self.get_db(channel)
try:
aka = db.query(Alias) \
.filter(Alias.name == name).one()
except sqlalchemy.orm.exc.NoResultFound:
raise AkaError(_('This Aka does not exist'))
if aka.locked:
raise AkaError(_('This Aka is already locked.'))
aka.locked = True
aka.locked_by = by
aka.locked_at = datetime.datetime.now()
db.commit()
def unlock_aka(self, channel, name, by):
if sys.version_info[0] < 3 and isinstance(name, str):
name = name.decode('utf8')
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db = self.get_db(channel)
try:
aka = db.query(Alias) \
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.filter(Alias.name == name).one()
except sqlalchemy.orm.exc.NoResultFound:
raise AkaError(_('This Aka does not exist'))
if not aka.locked:
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raise AkaError(_('This Aka is already unlocked.'))
aka.locked = False
aka.locked_by = by
aka.locked_at = datetime.datetime.now()
db.commit()
def get_aka_lock(self, channel, name):
if sys.version_info[0] < 3 and isinstance(name, str):
name = name.decode('utf8')
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try:
return self.get_db(channel) \
.query(Alias.locked, Alias.locked_by, Alias.locked_at)\
.filter(Alias.name == name).one()
except sqlalchemy.orm.exc.NoResultFound:
raise AkaError(_('This Aka does not exist'))
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def getArgs(args, required=1, optional=0, wildcard=0):
if len(args) < required:
raise callbacks.ArgumentError
if len(args) < required + optional:
ret = list(args) + ([''] * (required + optional - len(args)))
elif len(args) >= required + optional:
if not wildcard:
ret = list(args[:required + optional - 1])
ret.append(' '.join(args[required + optional - 1:]))
else:
ret = list(args)
return ret
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class AkaError(Exception):
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pass
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class RecursiveAlias(AkaError):
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pass
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
AkaDB = plugins.DB('Aka', {'sqlalchemy': SqlAlchemyAkaDB})
class Aka(callbacks.Plugin):
"""Add the help for "@plugin help Aka" here
This should describe *how* to use this plugin."""
def __init__(self, irc):
self.__parent = super(Aka, self)
self.__parent.__init__(irc)
self._db = AkaDB()
def isCommandMethod(self, name):
if sys.version_info[0] < 3 and isinstance(name, str):
name = name.decode('utf8')
channel = dynamic.channel or 'global'
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return self._db.has_aka(channel, name) or \
self._db.has_aka('global', name) or \
self.__parent.isCommandMethod(name)
isCommand = isCommandMethod
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def listCommands(self):
channel = dynamic.channel or 'global'
return list(set(self._db.get_aka_list(channel) +
self._db.get_aka_list('global') +
self.__parent.listCommands()))
def getCommand(self, args):
canonicalName = callbacks.canonicalName
# All the code from here to the 'for' loop is copied from callbacks.py
assert args == map(canonicalName, args)
first = args[0]
for cb in self.cbs:
if first == cb.canonicalName():
return cb.getCommand(args)
if first == self.canonicalName() and len(args) > 1:
ret = self.getCommand(args[1:])
if ret:
return [first] + ret
for i in xrange(len(args), 0, -1):
if self.isCommandMethod(callbacks.formatCommand(args[0:i])):
return args[0:i]
return []
def getCommandMethod(self, command):
if len(command) == 1 or command[0] == self.canonicalName():
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try:
return self.__parent.getCommandMethod(command)
except AttributeError:
pass
name = callbacks.formatCommand(command)
channel = dynamic.channel or 'global'
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original = self._db.get_alias(channel, name)
if not original:
original = self._db.get_alias('global', name)
biggestDollar = findBiggestDollar(original)
biggestAt = findBiggestAt(original)
wildcard = '$*' in original
def f(irc, msg, args):
tokens = callbacks.tokenize(original)
if biggestDollar or biggestAt:
args = getArgs(args, required=biggestDollar, optional=biggestAt,
wildcard=wildcard)
def regexpReplace(m):
idx = int(m.group(1))
return args[idx-1]
def replace(tokens, replacer):
for (i, token) in enumerate(tokens):
if isinstance(token, list):
replace(token, replacer)
else:
tokens[i] = replacer(token)
replace(tokens, lambda s: dollarRe.sub(regexpReplace, s))
if biggestAt:
assert not wildcard
args = args[biggestDollar:]
replace(tokens, lambda s: atRe.sub(regexpReplace, s))
if wildcard:
assert not biggestAt
# Gotta remove the things that have already been subbed in.
i = biggestDollar
while i:
args.pop(0)
i -= 1
def everythingReplace(tokens):
for (i, token) in enumerate(tokens):
if isinstance(token, list):
if everythingReplace(token):
return
if token == '$*':
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, msg, tokens)
if biggestDollar and (wildcard or biggestAt):
flexargs = _(' at least')
else:
flexargs = ''
try:
lock = self._db.get_aka_lock(channel, name)
except AkaError:
lock = self._db.get_aka_lock('global', name)
(locked, locked_by, locked_at) = lock
if locked:
lock = ' ' + _('Locked by %s at %s') % (locked_by, locked_at)
else:
lock = ''
doc = format(_('<an alias,%s %n>\n\nAlias for %q.%s'),
flexargs, (biggestDollar, _('argument')), original, lock)
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f = utils.python.changeFunctionName(f, name, doc)
return f
def _add_aka(self, channel, name, alias):
if self.__parent.isCommandMethod(name):
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raise AkaError(_('You can\'t overwrite commands in '
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'this plugin.'))
if self._db.has_aka(channel, name):
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raise AkaError(_('This Aka already exists.'))
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biggestDollar = findBiggestDollar(alias)
biggestAt = findBiggestAt(alias)
wildcard = '$*' in alias
if biggestAt and wildcard:
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raise AkaError(_('Can\'t mix $* and optional args (@1, etc.)'))
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if alias.count('$*') > 1:
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raise AkaError(_('There can be only one $* in an alias.'))
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self._db.add_aka(channel, name, alias)
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def _remove_aka(self, channel, name, evenIfLocked=False):
if not evenIfLocked:
(locked, by, at) = self._db.get_aka_lock(channel, name)
if locked:
raise AkaError(_('This Aka is locked.'))
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self._db.remove_aka(channel, name)
def add(self, irc, msg, args, optlist, name, alias):
"""[--channel <#channel>] <name> <command>
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Defines an alias <name> that executes <command>. The <command>
should be in the standard "command argument [nestedcommand argument]"
arguments to the alias; they'll be filled with the first, second, etc.
arguments. $1, $2, etc. can be used for required arguments. @1, @2,
etc. can be used for optional arguments. $* simply means "all
remaining arguments," and cannot be combined with optional arguments.
"""
channel = 'global'
for (option, arg) in optlist:
if option == 'channel':
if not ircutils.isChannel(arg):
irc.error(_('%r is not a valid channel.') % arg,
Raise=True)
channel = arg
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if ' ' not in alias:
# If it's a single word, they probably want $*.
alias += ' $*'
try:
self._add_aka(channel, name, alias)
self.log.info('Adding Aka %r for %r (from %s)' % (
name, alias, msg.prefix))
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irc.replySuccess()
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except AkaError as e:
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irc.error(str(e))
add = wrap(add, [getopts({
'channel': 'somethingWithoutSpaces',
}), 'something', 'text'])
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def remove(self, irc, msg, args, optlist, name):
"""[--channel <#channel>] <name>
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Removes the given alias, if unlocked.
"""
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channel = 'global'
for (option, arg) in optlist:
if option == 'channel':
if not ircutils.isChannel(arg):
irc.error(_('%r is not a valid channel.') % arg,
Raise=True)
channel = arg
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try:
self._remove_aka(channel, name)
self.log.info('Removing Aka %r (from %s)' % (name, msg.prefix))
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irc.replySuccess()
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except AkaError as e:
irc.error(str(e))
remove = wrap(remove, [getopts({
'channel': 'somethingWithoutSpaces',
}), 'something'])
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def _checkManageCapabilities(self, irc, msg, channel):
"""Check if the user has any of the required capabilities to manage
the regexp database."""
if channel != 'global':
capability = ircdb.makeChannelCapability(channel, 'op')
else:
capability = 'admin'
if not ircdb.checkCapability(msg.prefix, capability):
irc.errorNoCapability(capability, Raise=True)
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def lock(self, irc, msg, args, optlist, user, name):
"""[--channel <#channel>] <alias>
Locks an alias so that no one else can change it.
"""
channel = 'global'
for (option, arg) in optlist:
if option == 'channel':
if not ircutils.isChannel(arg):
irc.error(_('%r is not a valid channel.') % arg,
Raise=True)
channel = arg
self._checkManageCapabilities(irc, msg, channel)
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try:
self._db.lock_aka(channel, name, user.name)
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except AkaError as e:
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irc.error(str(e))
else:
irc.replySuccess()
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lock = wrap(lock, [getopts({
'channel': 'somethingWithoutSpaces',
}), 'user', 'something'])
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def unlock(self, irc, msg, args, optlist, user, name):
"""[--channel <#channel>] <alias>
Unlocks an alias so that people can define new aliases over it.
"""
channel = 'global'
for (option, arg) in optlist:
if option == 'channel':
if not ircutils.isChannel(arg):
irc.error(_('%r is not a valid channel.') % arg,
Raise=True)
channel = arg
self._checkManageCapabilities(irc, msg, channel)
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try:
self._db.unlock_aka(channel, name, user.name)
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except AkaError as e:
irc.error(str(e))
else:
irc.replySuccess()
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unlock = wrap(unlock, [getopts({
'channel': 'somethingWithoutSpaces',
}), 'user', 'something'])
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Class = Aka
# vim:set shiftwidth=4 softtabstop=4 expandtab textwidth=79: