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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\install\module\requirements\task;
/**
 * Checks filesystem requirements
 */
class check_filesystem extends \phpbb\install\task_base
{
    /**
     * @var \phpbb\filesystem\filesystem_interface
     */
    protected $filesystem;
    /**
     * @var array
     */
    protected $files_to_check;
    /**
     * @var bool
     */
    protected $tests_passed;
    /**
     * @var string
     */
    protected $phpbb_root_path;
    /**
     * @var \phpbb\install\helper\iohandler\iohandler_interface
     */
    protected $response;
    /**
     * Constructor
     *
     * @param \phpbb\filesystem\filesystem_interface                $filesystem            filesystem handler
     * @param \phpbb\install\helper\iohandler\iohandler_interface    $response            response helper
     * @param string                                                $phpbb_root_path    relative path to phpBB's root
     * @param string                                                $php_ext            extension of php files
     * @param bool                                                    $check_config_php    Whether or not to check if config.php is writable
     */
    public function __construct(\phpbb\filesystem\filesystem_interface $filesystem, \phpbb\install\helper\iohandler\iohandler_interface $response, $phpbb_root_path, $php_ext, $check_config_php = true)
    {
        parent::__construct(true);
        $this->filesystem        = $filesystem;
        $this->response            = $response;
        $this->phpbb_root_path    = $phpbb_root_path;
        $this->tests_passed = false;
        // Files/Directories to check
        // All file/directory names must be relative to phpBB's root path
        $this->files_to_check = array(
            array(
                'path' => 'cache/',
                'failable' => false,
                'is_file' => false,
            ),
            array(
                'path' => 'store/',
                'failable' => false,
                'is_file' => false,
            ),
            array(
                'path' => 'files/',
                'failable' => false,
                'is_file' => false,
            ),
            array(
                'path' => 'images/avatars/upload/',
                'failable' => true,
                'is_file' => false,
            ),
        );
        if ($check_config_php)
        {
            $this->files_to_check[] = array(
                'path' => "config.$php_ext",
                'failable' => false,
                'is_file' => true,
            );
        }
    }
    /**
     * {@inheritdoc}
     */
    public function run()
    {
        $this->tests_passed = true;
        // Check files/directories to be writable
        foreach ($this->files_to_check as $file)
        {
            if ($file['is_file'])
            {
                $this->check_file($file['path'], $file['failable']);
            }
            else
            {
                $this->check_dir($file['path'], $file['failable']);
            }
        }
        return $this->tests_passed;
    }
    /**
     * Sets $this->tests_passed
     *
     * @param    bool    $is_passed
     */
    protected function set_test_passed($is_passed)
    {
        // If one test failed, tests_passed should be false
        $this->tests_passed = (!$this->tests_passed) ? false : $is_passed;
    }
    /**
     * Check if a file is readable and writable
     *
     * @param string    $file        Filename
     * @param bool        $failable    Whether failing test should interrupt installation process
     */
    protected function check_file($file, $failable = false)
    {
        $path = $this->phpbb_root_path . $file;
        $exists = $writable = true;
        // Try to create file if it does not exists
        if (!file_exists($path))
        {
            $fp = @fopen($path, 'w');
            @fclose($fp);
            try
            {
                $this->filesystem->phpbb_chmod($path,
                    \phpbb\filesystem\filesystem_interface::CHMOD_READ | \phpbb\filesystem\filesystem_interface::CHMOD_WRITE
                );
                $exists = true;
            }
            catch (\phpbb\filesystem\exception\filesystem_exception $e)
            {
                // Do nothing
            }
        }
        if (file_exists($path))
        {
            if (!$this->filesystem->is_writable($path))
            {
                $writable = false;
            }
        }
        else
        {
            $exists = $writable = false;
        }
        $this->set_test_passed(($exists && $writable) || $failable);
        if (!($exists && $writable))
        {
            $title = ($exists) ? 'FILE_NOT_WRITABLE' : 'FILE_NOT_EXISTS';
            $lang_suffix = '_EXPLAIN';
            $lang_suffix .= ($failable) ? '_OPTIONAL' : '';
            $description = array($title . $lang_suffix, $file);
            if ($failable)
            {
                $this->response->add_warning_message($title, $description);
            }
            else
            {
                $this->response->add_error_message($title, $description);
            }
        }
    }
    /**
     * Check if a directory is readable and writable
     *
     * @param string    $dir        Filename
     * @param bool        $failable    Whether failing test should abort the installation process
     */
    protected function check_dir($dir, $failable = false)
    {
        $path = $this->phpbb_root_path . $dir;
        $exists = $writable = false;
        // Try to create the directory if it does not exist
        if (!file_exists($path))
        {
            try
            {
                $this->filesystem->mkdir($path, 0777);
                $this->filesystem->phpbb_chmod($path,
                    \phpbb\filesystem\filesystem_interface::CHMOD_READ | \phpbb\filesystem\filesystem_interface::CHMOD_WRITE
                );
                $exists = true;
            }
            catch (\phpbb\filesystem\exception\filesystem_exception $e)
            {
                // Do nothing
            }
        }
        // Now really check
        if (file_exists($path) && is_dir($path))
        {
            try
            {
                $exists = true;
                $this->filesystem->phpbb_chmod($path,
                    \phpbb\filesystem\filesystem_interface::CHMOD_READ | \phpbb\filesystem\filesystem_interface::CHMOD_WRITE
                );
            }
            catch (\phpbb\filesystem\exception\filesystem_exception $e)
            {
                // Do nothing
            }
        }
        if ($this->filesystem->is_writable($path))
        {
            $writable = true;
        }
        $this->set_test_passed(($exists && $writable) || $failable);
        if (!($exists && $writable))
        {
            $title = ($exists) ? 'DIRECTORY_NOT_WRITABLE' : 'DIRECTORY_NOT_EXISTS';
            $lang_suffix = '_EXPLAIN';
            $lang_suffix .= ($failable) ? '_OPTIONAL' : '';
            $description = array($title . $lang_suffix, $dir);
            if ($failable)
            {
                $this->response->add_warning_message($title, $description);
            }
            else
            {
                $this->response->add_error_message($title, $description);
            }
        }
    }
    /**
     * {@inheritdoc}
     */
    static public function get_step_count()
    {
        return 0;
    }
    /**
     * {@inheritdoc}
     */
    public function get_task_lang_name()
    {
        return '';
    }
}