Limnoria/plugins/Babelfish.py

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"""
Babelfish-related commands.
"""

import supybot

__revision__ = "$Id$"
__author__ = supybot.authors.jamessan

import sets
import random
from itertools import imap

import babelfish

import supybot.conf as conf
import supybot.utils as utils
import supybot.privmsgs as privmsgs
import supybot.registry as registry
import supybot.callbacks as callbacks

class Languages(registry.OnlySomeStrings):
    validStrings = tuple(map(str.capitalize, babelfish.available_languages))
    normalize = staticmethod(str.capitalize)

class SpaceSeparatedListOfLanguages(registry.SeparatedListOf):
    List = sets.Set
    Value = Languages
    def splitter(self, s):
        return s.split()
    joiner = ' '.join

conf.registerPlugin('Babelfish')
conf.registerChannelValue(conf.supybot.plugins.Babelfish, 'languages',
    SpaceSeparatedListOfLanguages(babelfish.available_languages, """Determines
    which languages are available for translation; valid input is a list of
    languages separated by spaces."""))

class Babelfish(callbacks.Privmsg):
    threaded = True
    _abbrevs = utils.abbrev(imap(str.lower, babelfish.available_languages))
    _abbrevs['de'] = 'german'
    _abbrevs['jp'] = 'japanese'
    _abbrevs['kr'] = 'korean'
    _abbrevs['es'] = 'spanish'
    _abbrevs['pt'] = 'portuguese'
    _abbrevs['it'] = 'italian'
    _abbrevs['zh'] = 'chinese'
    for language in babelfish.available_languages:
        _abbrevs[language] = language

    def _getLang(self, fromLang, toLang, chan):
        fromLang = self._abbrevs[fromLang.lower()]
        toLang = self._abbrevs[toLang.lower()]
        languages = map(str.lower, self.registryValue('languages',chan))
        if fromLang not in languages:
            fromLang = None
        if toLang not in languages:
            toLang = None
        return (fromLang, toLang)

    def languages(self, irc, msg, args):
        """takes no arguments

        Returns the languages that Babelfish can translate to/from.
        """
        irc.reply(utils.commaAndify(babelfish.available_languages))

    def translate(self, irc, msg, args):
        """<from-language> [to] <to-language> <text>

        Returns <text> translated from <from-language> into <to-language>.
        Beware that translating to or from languages that use multi-byte
        characters may result in some very odd results.
        """
        if len(args) >= 2 and args[1] == 'to':
            args.pop(1)
        (fromLang, toLang, text) = privmsgs.getArgs(args, required=3)
        chan = msg.args[0]
        try:
            (fromLang, toLang) = self._getLang(fromLang, toLang, chan)
            if not fromLang or not toLang:
                langs = self.registryValue('languages', chan)
                if not langs:
                    irc.error('I do not speak any other languages.')
                    return
                else:
                    irc.error('I only speak %s.' % utils.commaAndify(langs))
                    return
            translation = babelfish.translate(text, fromLang, toLang)
            irc.reply(translation)
        except (KeyError, babelfish.LanguageNotAvailableError), e:
            languages = self.registryValue('languages', chan)
            if languages:
                languages = 'Valid languages include %s' % \
                        utils.commaAndify(sorted(languages))
            else:
                languages = 'I do not speak any other languages.'
            irc.errorInvalid('language', str(e), languages)
        except babelfish.BabelizerIOError, e:
            irc.error(str(e))
        except babelfish.BabelfishChangedError, e:
            irc.error('Babelfish has foiled our plans by changing its '
                      'webpage format.')

    def babelize(self, irc, msg, args):
        """<from-language> <to-language> <text>

        Translates <text> repeatedly between <from-language> and <to-language>
        until it doesn't change anymore or 12 times, whichever is fewer.  One
        of the languages must be English.
        """
        (fromLang, toLang, text) = privmsgs.getArgs(args, required=3)
        chan = msg.args[0]
        try:
            (fromLang, toLang) = self._getLang(fromLang, toLang, chan)
            if fromLang != 'english' and toLang != 'english':
                irc.error('One language in babelize must be English.')
                return
            if not fromLang or not toLang:
                langs = self.registryValue('languages', chan)
                if not langs:
                    irc.error('I do not speak any other languages.')
                    return
                else:
                    irc.error('I only speak %s.' % utils.commaAndify(langs,
                                                                     And='or'))
                    return
            translations = babelfish.babelize(text, fromLang, toLang)
            irc.reply(utils.htmlToText(translations[-1]))
        except (KeyError, babelfish.LanguageNotAvailableError), e:
            languages = self.registryValue('languages', chan)
            if languages:
                languages = 'Valid languages include %s' % \
                        utils.commaAndify(sorted(languages))
            else:
                languages = 'I do not speak any other languages.'
            irc.errorInvalid('language', str(e), languages)
        except babelfish.BabelizerIOError, e:
            irc.reply(e)
        except babelfish.BabelfishChangedError, e:
            irc.reply('Babelfish has foiled our plans by changing its '
                      'webpage format.')

    def randomlanguage(self, irc, msg, args):
        """[<allow-english>]

        Returns a random language supported by babelfish.  If <allow-english>
        is provided, will include English in the list of possible languages.
        """
        allowEnglish = privmsgs.getArgs(args, required=0, optional=1)
        languages = self.registryValue('languages', msg.args[0])
        if not languages:
            irc.error('I can\'t speak any other languages.')
        language = random.choice(languages)
        while not allowEnglish and language == 'English':
            language = random.choice(languages)
        irc.reply(language)

Class = Babelfish

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