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<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/
namespace phpbb\language;
use \phpbb\language\exception\language_file_not_found;
/**
* Language file loader
*/
class language_file_loader
{
/**
* @var string Path to phpBB's root
*/
protected $phpbb_root_path;
/**
* @var string Extension of PHP files
*/
protected $php_ext;
/**
* @var \phpbb\extension\manager Extension manager
*/
protected $extension_manager;
/**
* Constructor
*
* @param string $phpbb_root_path Path to phpBB's root
* @param string $php_ext Extension of PHP files
*/
public function __construct($phpbb_root_path, $php_ext)
{
$this->phpbb_root_path = $phpbb_root_path;
$this->php_ext = $php_ext;
$this->extension_manager = null;
}
/**
* Extension manager setter
*
* @param \phpbb\extension\manager $extension_manager Extension manager
*/
public function set_extension_manager(\phpbb\extension\manager $extension_manager)
{
$this->extension_manager = $extension_manager;
}
/**
* Loads language array for the given component
*
* @param string $component Name of the language component
* @param string|array $locale ISO code of the language to load, or array of ISO codes if you want to
* specify additional language fallback steps
* @param array $lang Array reference containing language strings
*/
public function load($component, $locale, &$lang)
{
$locale = (array) $locale;
// Determine path to language directory
$path = $this->phpbb_root_path . 'language/';
$this->load_file($path, $component, $locale, $lang);
}
/**
* Loads language array for the given extension component
*
* @param string $extension Name of the extension
* @param string $component Name of the language component
* @param string|array $locale ISO code of the language to load, or array of ISO codes if you want to
* specify additional language fallback steps
* @param array $lang Array reference containing language strings
*/
public function load_extension($extension, $component, $locale, &$lang)
{
// Check if extension manager was loaded
if ($this->extension_manager === null)
{
// If not, let's return
return;
}
$locale = (array) $locale;
// Determine path to language directory
$path = $this->extension_manager->get_extension_path($extension, true) . 'language/';
$this->load_file($path, $component, $locale, $lang);
}
/**
* Prepares language file loading
*
* @param string $path Path to search for file in
* @param string $component Name of the language component
* @param array $locale Array containing language fallback options
* @param array $lang Array reference of language strings
*/
protected function load_file($path, $component, $locale, &$lang)
{
// This is BC stuff and not the best idea as it makes language fallback
// implementation quite hard like below.
if (strpos($this->phpbb_root_path . $component, $path) === 0)
{
// Filter out the path
$path_diff = str_replace($path, '', dirname($this->phpbb_root_path . $component));
$language_file = basename($component, '.' . $this->php_ext);
$component = '';
// This step is needed to resolve language/en/subdir style $component
// $path already points to the language base directory so we need to eliminate
// the first directory from the path (that should be the language directory)
$path_diff_parts = explode('/', $path_diff);
if (count($path_diff_parts) > 1)
{
array_shift($path_diff_parts);
$component = implode('/', $path_diff_parts) . '/';
}
$component .= $language_file;
}
// Determine filename
$filename = $component . '.' . $this->php_ext;
// Determine path to file
$file_path = $this->get_language_file_path($path, $filename, $locale);
// Load language array
$this->load_language_file($file_path, $lang);
}
/**
* This function implements language fallback logic
*
* @param string $path Path to language directory
* @param string $filename Filename to load language strings from
*
* @return string Relative path to language file
*
* @throws language_file_not_found When the path to the file cannot be resolved
*/
protected function get_language_file_path($path, $filename, $locales)
{
$language_file_path = $filename;
// Language fallback logic
foreach ($locales as $locale)
{
$language_file_path = $path . $locale . '/' . $filename;
// If we are in install, try to use the updated version, when available
if (defined('IN_INSTALL'))
{
$install_language_path = str_replace('language/', 'install/update/new/language/', $language_file_path);
if (file_exists($install_language_path))
{
return $install_language_path;
}
}
if (file_exists($language_file_path))
{
return $language_file_path;
}
}
// The language file is not exist
throw new language_file_not_found('Language file ' . $language_file_path . ' couldn\'t be opened.');
}
/**
* Loads language file
*
* @param string $path Path to language file to load
* @param array $lang Reference of the array of language strings
*/
protected function load_language_file($path, &$lang)
{
// Do not suppress error if in DEBUG mode
if (defined('DEBUG'))
{
include $path;
}
else
{
@include $path;
}
}
}
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