Limnoria/src/configurable.py
2004-01-02 19:54:25 +00:00

288 lines
11 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.
###
__revision__ = "$Id$"
import os
import conf
import utils
import ircdb
import ircutils
import privmsgs
import callbacks
class Dictionary(object):
"""This is a dictionary to handle configuration for individual channels,
including a default configuration for channels that haven't modified their
configuration from the default.
"""
def __init__(self, seq):
self.helps = {}
self.types = {}
self.defaults = {}
self.originalNames = {}
self.unparsedValues = {}
self.channels = ircutils.IrcDict()
for (name, type, default, help) in seq:
if ',' in name:
raise ValueError, 'There can be no commas in the name.'
original = name
name = callbacks.canonicalName(name)
self.originalNames[name] = original
self.helps[name] = utils.normalizeWhitespace(help)
self.types[name] = type
self.defaults[name] = default
def __contains__(self, name):
name = callbacks.canonicalName(name)
return name in self.defaults
def get(self, name, channel=None):
name = callbacks.canonicalName(name)
if channel is not None:
try:
return self.channels[channel][name]
except KeyError:
return self.defaults[name]
else:
return self.defaults[name]
def set(self, name, value, channel=None):
name = callbacks.canonicalName(name)
if name not in self.originalNames:
raise KeyError, name
if ',' in name:
raise ValueError, 'There can be no commas in the name.'
self.unparsedValues[(channel, name)] = value
if channel is not None:
d = self.channels.setdefault(channel, {})
d[name] = self.types[name](value)
else:
self.defaults[name] = self.types[name](value)
def help(self, name):
return self.helps[callbacks.canonicalName(name)]
def names(self):
L = self.originalNames.values()
L.sort()
return L
class Error(TypeError):
pass
def BoolType(s):
s = s.lower()
if s in ('true', 'enable', 'on'):
return True
elif s in ('false', 'disable', 'off'):
return False
else:
s = 'Value must be one of on/off/true/false/enable/disable.'
raise Error, s
def StrType(s):
if s and s[0] not in '\'"' and s[-1] not in '\'"':
s = repr(s)
try:
v = utils.safeEval(s)
if type(v) is not str:
raise ValueError
except ValueError: # This catches the utils.safeEval(s) errors too.
raise Error, 'Value must be a string.'
return v
def NoSpacesStrType(s):
try:
s = StrType(s)
if len(s.split(None, 1)) > 1:
raise Error
return s
except Error:
raise Error, 'Value must be a string with no space characters.'
def RegexpStrType(s):
try:
s = StrType(s)
r = utils.perlReToPythonRe(s)
return r
except ValueError, e:
raise Error, 'Value must be a valid regular expression: %s' % e
except Error:
raise Error, 'Value must be a valid regular expression.'
def RegexpOrNoneStrType(s):
try:
if not s:
return None
else:
return RegexpStrType(s)
except Error:
raise Error, 'Value must be a valid regular expression or the ' \
'empty string, representing nothing.'
def IntType(s):
try:
return int(s)
except ValueError:
raise Error, 'Value must be an integer.'
def PositiveIntType(s):
try:
i = IntType(s)
if i > 0:
return i
else:
raise Error
except Error:
raise Error, 'Value must be a positive integer.'
class Mixin(object):
"""A mixin class to provide a "config" command that can be consistent
across all plugins, in order to unify the configuration for each plugin.
Plugins subclassing this should have a "configurables" attribute which is
a ConfigurableDictionary initialized with a list of 4-tuples of
(name, type, default, help). Name is the string name of the config
variable; type is a function taking a string and returning some value of
the type the variable is supposed to be; default is the default value the
variable should take on; help is a string that'll be returned to describe
the purpose of the config variable.
"""
def __init__(self):
className = self.__class__.__name__
self.filename = os.path.join(conf.confDir, '%s-configurable'%className)
if os.path.exists(self.filename):
fd = file(self.filename)
for line in fd:
line = line.rstrip()
(channel, name, value) = line.split(',', 2)
try:
# The eval here is to turn from "'foo'" to 'foo'.
value = eval(value)
except Exception, e:
self.log.error('Invalid configurable line: %r', line)
continue
try:
if channel == 'global':
try:
self.globalConfigurables.set(name, value)
except AttributeError:
s = 'Attempt to set non-existent global ' \
'configurable %s' % value
self.log.warning(s, name)
else:
if channel == 'default':
channel = None
else:
assert ircutils.isChannel(channel)
self.configurables.set(name, value, channel)
except Error, e: # Type error conversion.
s = 'Couldn\'t type-convert configurable %s: %s'
self.log.warning(s, name, e)
except KeyError, e:
s = 'Configurable variable %s doesn\'t exist anymore.'
self.log.warning(s, name)
def die(self):
fd = file(self.filename, 'w')
def flushDictionary(d):
L = d.unparsedValues.items()
L.sort()
for ((channel, name), value) in L:
if channel is None:
channel = 'default'
name = d.originalNames[name]
fd.write('%s,%s,%r\n' % (channel, name, value))
if hasattr(self, 'globalConfigurables'):
flushDictionary(self.globalConfigurables)
flushDictionary(self.configurables)
fd.close()
def config(self, irc, msg, args):
"""[<channel>] [<name>] [<value>]
Sets the value of config variable <name> to <value> on <channel>. If
<name> is given but <value> is not, returns the help and current value
for <name>. If neither <name> nor <value> is given, returns the valid
config variables for this plugin. <channel> is only necessary if the
message isn't sent in the channel itself.
"""
if not args: # They want a list of the configurables.
names = self.configurables.names()
if hasattr(self, 'globalConfigurables'):
names.extend(self.globalConfigurables.names())
names.sort()
irc.reply(msg, utils.commaAndify(names))
else:
try:
channel = privmsgs.getChannel(msg, args)
capability = ircdb.makeChannelCapability(channel, 'op')
except callbacks.Error:
channel = None
capability = 'admin'
(name, value) = privmsgs.getArgs(args, required=1, optional=1)
if name in self.configurables:
if value:
if ircdb.checkCapability(msg.prefix, capability):
try:
self.configurables.set(name, value, channel)
irc.reply(msg, conf.replySuccess)
except Error, e:
irc.error(msg, str(e))
else:
irc.error(msg, conf.replyNoCapability % capability)
else:
irc.reply(msg, self.configurables.help(name))
elif hasattr(self, 'globalConfigurables') and \
name in self.globalConfigurables:
if value:
if ircdb.checkCapability(msg.prefix, 'admin'):
try:
self.globalConfigurables.set(name, value, channel)
irc.reply(msg, conf.replySuccess)
except Error, e:
irc.error(msg, str(e))
else:
s = '%s is a global capability, and requires ' \
'the "admin" capability.'
irc.error(msg, s)
else:
irc.reply(msg, self.globalConfigurables.help(name))
else:
irc.error(msg, 'There is no config variable %r' % name)
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