#!/usr/bin/python

## languageBackend.py - Contains the backend code needed for system-config-language
## Copyright (C) 2002, 2003 Red Hat, Inc.
## Copyright (C) 2002, 2003 Brent Fox <bfox@redhat.com>

## 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 2 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, write to the Free Software
## Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

import string
import os

##
## I18N
## 
import gettext
gettext.bindtextdomain ("system-config-language", "/usr/share/locale")
gettext.textdomain ("system-config-language")
_=gettext.gettext

class LanguageBackend:
    def getInstalledLangs(self):
        self.originalFile = None
        path = '/etc/sysconfig/i18n'
        if os.access(path, os.R_OK) == 0:
            return None, None
        else:
            fd = open(path, "r")
            self.originalFile = fd.readlines()
            fd.close()

            defaultLang = None
            langs = None

            for line in self.originalFile:
                if line[:5] == "LANG=":
                    defaultLang = string.replace(line[5:], '"', '')
                    defaultLang = string.strip(defaultLang)
                if line[:9] == "SUPPORTED":
                    langs = string.replace(line[10:], '"', '')
                    langs = string.strip(langs)
                    langs = string.split(langs, ':')

            if langs:
                for lang in langs:
                    #Chop off any encoding data.  We don't really need it
                    langBase = self.removeEncoding(lang)
                    langs[langs.index(lang)] = langBase

            if defaultLang:
                defaultLang = self.removeEncoding(defaultLang)
            else:
                defaultLang = "en_US"
            
            return defaultLang, langs

    def removeEncoding(self, lang):
        if '.' in lang:
            langBase = string.split(lang, '.')
            return langBase[0]
        elif '@' in lang:
            langBase = string.split(lang, '@')
            return langBase[0]
        else:
            return lang

    def readTable(self):
        lines = None
        fd = None
        try:
            fd = open("locale-list", "r")
        except:
            try:
                fd = open("/usr/share/system-config-language/locale-list", "r")
            except:
                pass

        if fd:
            lines = fd.readlines()
            fd.close()

        if not lines:
            raise RuntimeError, (_("Cannot find locale-list"))
        else:
            return lines

    def writeI18N(self, defaultLang, modules, sysfont, sysfontacm):
        fd = open('/etc/sysconfig/i18n', 'w')
        if self.originalFile:
            for line in self.originalFile:
                if line[:5] == "LANG=":
                    fd.write('LANG="' + defaultLang + '"\n')
                    #XXX - horrible hack to make simplified chinese work
                    if defaultLang == "zh_CN.GB18030":
                        fd.write('LANGUAGE="zh_CN.GB18030:zh_CN.GB2312:zh_CN"\n')

                elif line[:8] == "SYSFONT=":
                    fd.write('SYSFONT="' + sysfont + '"\n')                
                elif line[:11] == 'SYSFONTACM=':
                    fd.write('SYSFONTACM="' + sysfontacm + '"\n')
                elif line[:9] == 'LANGUAGE=':
                    #XXX - horrible hack to make simplified chinese work
                    if defaultLang != "zh_CN.GB18030":
                        pass
                else:
                    fd.write(line)

        else:
            fd.write('LANG="' + defaultLang + '"\n')
            if modules:
                fd.write('SUPPORTED="' + modules + '"\n')
            fd.write('SYSFONT="' + sysfont + '"\n')
            if sysfontacm != "utf8":
                fd.write('SYSFONTACM="' + sysfontacm + '"\n')

            #XXX - horrible hack to make simplified chinese work
            if defaultLang == "zh_CN.GB18030":
                fd.write('LANGUAGE="zh_CN.GB18030:zh_CN.GB2312:zh_CN"\n')


        fd.close()