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<?php
/*
* Copyright (c) 2009 David Soria Parra
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/

require_once 'PHP.php';
require_once 'Extension.php';

/**
* Gettext implementation in PHP
*
* @copyright (c) 2009 David Soria Parra <sn_@gmx.net>
* @author David Soria Parra <sn_@gmx.net>
*/
abstract class Gettext
{
    private static $instance = null;

    /**
* Return a translated string
*
* If the translation is not found, the original passed message
* will be returned.
*
* @param String $msg The message to translate
*
* @return Translated message
*/
    public abstract function gettext($msg);

    /**
* Return a translated string in it's plural form
*
* Returns the given $count (e.g second, third,...) plural form of the
* given string. If the id is not found and $num == 1 $msg is returned,
* otherwise $msg_plural
*
* @param String $msg The message to search for
* @param String $msg_plural A fallback plural form
* @param Integer $count Which plural form
*
* @return Translated string
*/
    public abstract function ngettext($msg1, $msg2, $count);

    /**
* Returns an instance of a gettext implementation depending on
* the capabilities of the PHP installation. If the gettext extension
* is loaded, we use the native gettext() bindings, otherwise we use
* an own implementation
*
* @param String $directory Directory to search the mo files in
* @param String $domain The current domain
* @param String $locale The local
*
* @return Gettext An instance of a Gettext implementation
*/
    public static function getInstance($directory, $domain, $locale)
    {
        $key = $directory . $domain . $locale;
        if (!isset(self::$instance[$key])) {
            if (extension_loaded('gettext')) {
                self::$instance[$key] = new Gettext_Extension($directory, $domain, $locale);
            } else {
                self::$instance[$key] = new Gettext_PHP($directory, $domain, $locale);
            }
        }

        return self::$instance[$key];
    }
}
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