"""
GoogleTranslate - go out to google and translate sentences
Copyright (C) 2010  Brian S. Stephan

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
"""

import re
from urllib2 import urlopen
from urllib import urlencode

from extlib import irclib

from Module import Module

class GoogleTranslate(Module):

    """Class that translates text via Google Translate.

    http://code.google.com/apis/ajaxlanguage/documentation/
    """

    def do(self, connection, event, nick, userhost, what, admin_unlocked):
        """Query Google for weather info.

        Leaves the input alone to let google make the best guess.
        """

        match = re.search('^!translate\s+(\S+)\s+(\S+)\s+(.*)$', what)
        if match:
            fromlang = match.group(1)
            tolang = match.group(2)
            text = match.group(3)

            langpair = '%s|%s' % (fromlang, tolang)
            gt_url = 'http://ajax.googleapis.com/ajax/services/language/translate'
            params = urlencode( (('v', 1.0), ('q', text), ('langpair', langpair),) )
            content = urlopen(gt_url, params).read()
            start_idx = content.find('"translatedText":"')+18
            translation = content[start_idx:]
            end_idx = translation.find('"}, "')
            translation = translation[:end_idx]

            # do some text conversion
            translation = translation.replace('\\u0026quot;', '"')
            translation = translation.replace('\\u0026amp;', '&')
            translation = translation.replace('\\u003c', '<')
            translation = translation.replace('\\u0026lt;', '<')
            translation = translation.replace('\\u003e', '>')
            translation = translation.replace('\\u0026gt;', '>')
            translation = translation.replace('\\u0026#39;', '\'')

            return translation

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