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<?php
/**
* @file i18n.php
* This file is part of MOVIM.
*
* @brief A collection of functions to translate strings.
*
* @author Etenil <etenil@etenilsrealm.nl>
*
* @version 1.0
* @date 22 December 2010
*
* Copyright (C)2010 MOVIM team.
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
$language = "";
$translations = array();
/**
* Translates strings into the given langage.
*/
function t($string)
{
global $language;
global $translations;
if(isset($translations[$string])) {
return $translations[$string];
}
return $string;
}
function get_quoted_string($string)
{
$matches = array();
preg_match('#"(.+)"#', $string, $matches);
return $matches[1];
}
/**
* Parses a .po file.
*/
function parse_lang_file($pofile)
{
if(!file_exists($pofile)) {
return false;
}
// Parsing the file.
$handle = fopen($pofile, 'r');
$trans_string = array();
$msgid = "";
$msgstr = "";
$last_token = "";
while($line = fgets($handle)) {
if($line[0] == "#" || trim(rtrim($line)) == "") {
continue;
}
if(preg_match('#^msgid#', $line)) {
if($last_token == "msgstr") {
$trans_string[$msgid] = $msgstr;
}
$last_token = "msgid";
$msgid = get_quoted_string($line);
}
else if(preg_match('#^msgstr#', $line)) {
$last_token = "msgstr";
$msgstr = get_quoted_string($line);
}
else {
$$last_token .= get_quoted_string($line);
}
}
if($last_token == "msgstr") {
$trans_string[$msgid] = $msgstr;
}
fclose($handle);
return $trans_string;
}
/**
* Loads the given language.
*/
function load_language($lang)
{
global $translations;
global $language;
if($lang == $language) {
return true;
}
$translations = parse_lang_file(BASE_PATH . '/i18n/' . $lang . '.po');
$language = $lang;
return true;
}
/**
* Loads a .po file and adds the translations to the existing ones.
* Conflicting translation strings will be rejected.
*/
function load_extra_lang($directory)
{
global $translations;
global $language;
// Converting to unix path (simpler and portable.)
$directory = str_replace('\\', '/', $directory);
if($directory[-1] != '/') {
$directory .= '/';
}
$trans = parse_lang_file($directory . $language . '.po');
if(!$trans) {
return false;
}
// Merging the arrays. The existing translations have priority.
foreach($trans as $msgid => $msgstr) {
if(array_key_exists($msgid, $translations)) {
continue;
}
$translations[$msgid] = $msgstr;
}
return true;
}
?>