Limnoria/plugins/Currency.py

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#!/usr/bin/env python
###
# Copyright (c) 2004, James Vega
# 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.
###
"""
Provides commands which interface with various websites to perform currency
conversions.
"""
__revision__ = "$Id$"
__author__ = ''
import re
import conf
import utils
import ircutils
import privmsgs
import registry
import webutils
import callbacks
class CurrencyCommand(registry.String):
def setValue(self, s):
m = Currency.currencyCommands
if s not in m:
raise registry.InvalidRegistryValue,\
'Command must be one of %s' % utils.commaAndify(m)
else:
method = getattr(Currency, s)
Currency.convert.im_func.__doc__ = method.__doc__
registry.String.setValue(self, s)
class Currency(callbacks.Privmsg):
currencyCommands = ['xe', 'yahoo']
threaded = True
_symbolError = 'Currency must be denoted by it\'s 3-letter symbol.'
def convert(self, irc, msg, args):
# This specifically does not have a docstring.
channel = None
if ircutils.isChannel(msg.args[0]):
channel = msg.args[0]
realCommandName = self.registryValue('command', channel)
realCommand = getattr(self, realCommandName)
realCommand(irc, msg, args)
_xeCurrError = re.compile(r'The following error occurred:<BR><BR>\s+'
r'(.*)</body>', re.I | re.S)
_xeConvert = re.compile(r'<TD[^>]+><FONT[^>]+>\s+([\d.]+\s+\w{3}\s+='
r'\s+[\d.]+\s+\w{3})', re.I | re.S)
def xe(self, irc, msg, args):
"""[<number>] <currency1> to <currency2>
Converts from <currency1> to <currency2>. If number isn't given, it
defaults to 1.
"""
(number, curr1, curr2) = privmsgs.getArgs(args, required=2,
optional=1)
try:
int(number)
except ValueError:
curr2 = curr1
curr1 = number
number = "1"
curr1 = curr1.lower()
curr2 = curr2.lower()
if curr2.startswith('to '):
curr2 = curr2[3:]
if len(curr1) != 3 or len(curr2) != 3:
irc.error(self._symbolError)
return
url = 'http://www.xe.com/ucc/convert.cgi?Amount=%s&From=%s&To=%s'
try:
text = webutils.getUrl(url % (number, curr1, curr2))
except webutils.WebError, e:
irc.error(str(e))
return
err = self._xeCurrError.search(text)
if err is not None:
irc.error('You used an incorrect currency symbol.')
return
conv = self._xeConvert.search(text)
if conv is not None:
irc.reply(conv.group(1))
return
else:
irc.error('XE must\'ve changed the format of their site.')
return
_yahooConvert = re.compile(r'\w{6}=X</a></td><td class[^>]+><b>([\d.]+)'
r'</b></td><td class[^>]+>\w{3} \d\d?</td><td'
r' class=[^>]+>[\d.]+</td><td class[^>]+><b>'
r'([\d.]+)', re.I | re.S)
def yahoo(self, irc, msg, args):
"""[<number>] <currency1> to <currency2>
Converts from <currency1> to <currency2>. If number isn't given, it
defaults to 1.
"""
(number, curr1, curr2) = privmsgs.getArgs(args, required=2,
optional=1)
try:
int(number)
except ValueError:
curr2 = curr1
curr1 = number
number = "1"
curr1 = curr1.lower()
curr2 = curr2.lower()
if curr2.startswith('to '):
curr2 = curr2[3:]
if len(curr1) != 3 or len(curr2) != 3:
irc.error(self._symbolError)
return
url = 'http://finance.yahoo.com/currency/convert?amt=%s&from=%s&'\
'to=%s&submit=Convert'
try:
text = webutils.getUrl(url % (number, curr1, curr2))
except webutils.WebError, e:
irc.error(str(e))
return
conv = self._yahooConvert.search(text)
if conv is not None:
irc.reply('%s %s = %s %s' % (conv.group(1), curr1.upper(),
conv.group(2), curr2.upper()))
return
else:
irc.error('Either you used the wrong currency symbol(s) or Yahoo '
'changed the format of their site.')
return
conf.registerPlugin('Currency')
conf.registerChannelValue(conf.supybot.plugins.Currency, 'command',
CurrencyCommand('xe', """Sets the default command to use when retrieving
the currency conversion. Command must be one of %s.""" %
utils.commaAndify(Currency.currencyCommands, And='or')))
Class = Currency
# vim:set shiftwidth=4 tabstop=8 expandtab textwidth=78: