gnu-social/lib/language.php

<?php
/**
 * Laconica, the distributed open-source microblogging tool
 *
 * utility functions for i18n
 *
 * PHP version 5
 *
 * LICENCE: This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * @category I18n
 * @package  Laconica
 * @author   Matthew Gregg <matthew.gregg@gmail.com>
 * @author   Ciaran Gultnieks <ciaran@ciarang.com>
 * @author   Evan Prodromou <evan@controlyourself.ca>
 * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
 * @link     http://laconi.ca/
 */

if (!defined('LACONICA')) {
    exit(1);
}

/**
 * Content negotiation for language codes
 *
 * @param string $httplang HTTP Accept-Language header
 *
 * @return string language code for best language match
 */

function client_prefered_language($httplang)
{
    $client_langs = array();

    $all_languages = common_config('site', 'languages');

    preg_match_all('"(((\S\S)-?(\S\S)?)(;q=([0-9.]+))?)\s*(,\s*|$)"',
                   strtolower($httplang), $httplang);

    for ($i = 0; $i < count($httplang); $i++) {
        if (!empty($httplang[2][$i])) {
            // if no q default to 1.0
            $client_langs[$httplang[2][$i]] =
              ($httplang[6][$i]? (float) $httplang[6][$i] : 1.0);
        }
        if (!empty($httplang[3][$i]) && empty($client_langs[$httplang[3][$i]])) {
            // if a catchall default 0.01 lower
            $client_langs[$httplang[3][$i]] =
              ($httplang[6][$i]? (float) $httplang[6][$i]-0.01 : 0.99);
        }
    }
    // sort in decending q
    arsort($client_langs);

    foreach ($client_langs as $lang => $q) {
        if (isset($all_languages[$lang])) {
            return($all_languages[$lang]['lang']);
        }
    }
    return false;
}

/**
 * returns a simple code -> name mapping for languages
 *
 * @return array map of available languages by code to language name.
 */

function get_nice_language_list()
{
    $nice_lang = array();

    $all_languages = common_config('site', 'languages');

    foreach ($all_languages as $lang) {
        $nice_lang = $nice_lang + array($lang['lang'] => $lang['name']);
    }
    return $nice_lang;
}

/**
 * Get a list of all languages that are enabled in the default config
 *
 * This should ONLY be called when setting up the default config in common.php.
 * Any other attempt to get a list of lanugages should instead call
 * common_config('site','languages')
 *
 * @return array mapping of language codes to language info
 */

function get_all_languages()
{
    return
      array('en-us' => array('q' => 1, 'lang' => 'en_US',
                             'name' => 'English (US)', 'direction' => 'ltr'),
            'en-nz' => array('q' => 1, 'lang' => 'en_NZ',
                             'name' => 'English (NZ)', 'direction' => 'ltr'),
            'en-gb' => array('q' => 1, 'lang' => 'en_GB',
                             'name' => 'English (British)', 'direction' => 'ltr'),
            'en' => array('q' => 1, 'lang' => 'en',
                          'name' => 'English', 'direction' => 'ltr'),
            'da' => array('q' => 0.1, 'lang' => 'da_DK',
                          'name' => 'Danish', 'direction' => 'ltr'),
            'nl' => array('q' => 1, 'lang' => 'nl_NL',
                          'name' => 'Dutch', 'direction' => 'ltr'),
            'eo' => array('q' => 0.1, 'lang' => 'eo',
                          'name' => 'Esperanto', 'direction' => 'ltr'),
            'fr-fr' => array('q' => 0.9, 'lang' => 'fr_FR',
                             'name' => 'French', 'direction' => 'ltr'),
            'de' => array('q' => 1, 'lang' => 'de_DE',
                          'name' => 'German', 'direction' => 'ltr'),
            'it' => array('q' => 1, 'lang' => 'it_IT',
                          'name' => 'Italian', 'direction' => 'ltr'),
            'ko' => array('q' => 0.1, 'lang' => 'ko',
                          'name' => 'Korean', 'direction' => 'ltr'),
            'nb' => array('q' => 1, 'lang' => 'nb_NO',
                          'name' => 'Norwegian (bokmal)', 'direction' => 'ltr'),
            'pt' => array('q' => 0.2, 'lang' => 'pt',
                          'name' => 'Portuguese', 'direction' => 'ltr'),
            'pt-br' => array('q' => 1, 'lang' => 'pt_BR',
                             'name' => 'Portuguese Brazil', 'direction' => 'ltr'),
            'es' => array('q' => 1, 'lang' => 'es',
                          'name' => 'Spanish', 'direction' => 'ltr'),
            'tr' => array('q' => 1, 'lang' => 'tr_TR',
                          'name' => 'Turkish', 'direction' => 'ltr'),
            'uk' => array('q' => 1, 'lang' => 'uk_UA',
                          'name' => 'Ukrainian', 'direction' => 'ltr'),
            'pl' => array('q' => 1, 'lang' => 'pl_PL',
                          'name' => 'Polish', 'direction' => 'ltr'),
            'mk' => array('q' => 1, 'lang' => 'mk_MK',
                          'name' => 'Macedonian', 'direction' => 'ltr'),
            'jp' => array('q' => 0.1, 'lang' => 'ja_JP',
                          'name' => 'Japanese', 'direction' => 'ltr'),
            'cs' => array('q' => 1, 'lang' => 'cs_CZ',
                          'name' => 'Czech', 'direction' => 'ltr'),
            'ca' => array('q' => 1, 'lang' => 'ca_ES',
                          'name' => 'Catalan', 'direction' => 'ltr'),
            );
}