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<?php

/**

 * CodeIgniter

 *

 * An open source application development framework for PHP

 *

 * This content is released under the MIT License (MIT)

 *

 * Copyright (c) 2014 - 2017, British Columbia Institute of Technology

 *

 * 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.

 *

 * @package	CodeIgniter

 * @author	EllisLab Dev Team

 * @copyright	Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)

 * @copyright	Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)

 * @license	http://opensource.org/licenses/MIT	MIT License

 * @link	https://codeigniter.com

 * @since	Version 1.0.0

 * @filesource

 */

defined('BASEPATH') OR exit('No direct script access allowed');

/**

 * Language Class

 *

 * @package		CodeIgniter

 * @subpackage	Libraries

 * @category	Language

 * @author		EllisLab Dev Team

 * @link		https://codeigniter.com/user_guide/libraries/language.html

 */

class CI_Lang {

	/**

	 * List of translations

	 *

	 * @var	array

	 */

	public $language =	array();

	/**

	 * List of loaded language files

	 *

	 * @var	array

	 */

	public $is_loaded =	array();

	/**

	 * Class constructor

	 *

	 * @return	void

	 */

	public function __construct()

	{

		log_message('info', 'Language Class Initialized');

	}

	// --------------------------------------------------------------------

	/**

	 * Load a language file

	 *

	 * @param	mixed	$langfile	Language file name

	 * @param	string	$idiom		Language name (english, etc.)

	 * @param	bool	$return		Whether to return the loaded array of translations

	 * @param 	bool	$add_suffix	Whether to add suffix to $langfile

	 * @param 	string	$alt_path	Alternative path to look for the language file

	 *

	 * @return	void|string[]	Array containing translations, if $return is set to TRUE

	 */

	public function load($langfile, $idiom = '', $return = FALSE, $add_suffix = TRUE, $alt_path = '')

	{

		if (is_array($langfile))

		{

			foreach ($langfile as $value)

			{

				$this->load($value, $idiom, $return, $add_suffix, $alt_path);

			}

			return;

		}

		$langfile = str_replace('.php', '', $langfile);

		if ($add_suffix === TRUE)

		{

			$langfile = preg_replace('/_lang$/', '', $langfile).'_lang';

		}

		$langfile .= '.php';

		if (empty($idiom) OR ! preg_match('/^[a-z_-]+$/i', $idiom))

		{

			$config =& get_config();

			$idiom = empty($config['language']) ? 'english' : $config['language'];

		}

		if ($return === FALSE && isset($this->is_loaded[$langfile]) && $this->is_loaded[$langfile] === $idiom)

		{

			return;

		}

		// Load the base file, so any others found can override it

		$basepath = BASEPATH.'language/'.$idiom.'/'.$langfile;

		if (($found = file_exists($basepath)) === TRUE)

		{

			include($basepath);

		}

		// Do we have an alternative path to look in?

		if ($alt_path !== '')

		{

			$alt_path .= 'language/'.$idiom.'/'.$langfile;

			if (file_exists($alt_path))

			{

				include($alt_path);

				$found = TRUE;

			}

		}

		else

		{

			foreach (get_instance()->load->get_package_paths(TRUE) as $package_path)

			{

				$package_path .= 'language/'.$idiom.'/'.$langfile;

				if ($basepath !== $package_path && file_exists($package_path))

				{

					include($package_path);

					$found = TRUE;

					break;

				}

			}

		}

		if ($found !== TRUE)

		{

			show_error('Unable to load the requested language file: language/'.$idiom.'/'.$langfile);

		}

		if ( ! isset($lang) OR ! is_array($lang))

		{

			log_message('error', 'Language file contains no data: language/'.$idiom.'/'.$langfile);

			if ($return === TRUE)

			{

				return array();

			}

			return;

		}

		if ($return === TRUE)

		{

			return $lang;

		}

		$this->is_loaded[$langfile] = $idiom;

		$this->language = array_merge($this->language, $lang);

		log_message('info', 'Language file loaded: language/'.$idiom.'/'.$langfile);

		return TRUE;

	}

	// --------------------------------------------------------------------

	/**

	 * Language line

	 *

	 * Fetches a single line of text from the language array

	 *

	 * @param	string	$line		Language line key

	 * @param	bool	$log_errors	Whether to log an error message if the line is not found

	 * @return	string	Translation

	 */

	public function line($line, $log_errors = TRUE)

	{

		$value = isset($this->language[$line]) ? $this->language[$line] : FALSE;

		// Because killer robots like unicorns!

		if ($value === FALSE && $log_errors === TRUE)

		{

			log_message('error', 'Could not find the language line "'.$line.'"');

		}

		return $value;

	}

}