<?php

/**

 * Smarty write file plugin

 *

 * @package    Smarty

 * @subpackage PluginsInternal

 * @author     Monte Ohrt

 */

/**

 * Smarty Internal Write File Class

 *

 * @package    Smarty

 * @subpackage PluginsInternal

 */

class Smarty_Internal_Write_File {

    /**

     * Writes file in a safe way to disk

     *

     * @param  string $_filepath complete filepath

     * @param  string $_contents file content

     * @param  Smarty $smarty smarty instance

     *

     * @throws SmartyException

     * @return boolean true

     */

    public function writeFile($_filepath, $_contents, Smarty $smarty) {

        $_error_reporting = error_reporting();

        error_reporting($_error_reporting & ~E_NOTICE & ~E_WARNING);

        if ($smarty->_file_perms !== null) {

            $old_umask = umask(0);

        }

        $_dirpath = dirname($_filepath);

        // if subdirs, create dir structure

        if ($_dirpath !== '.' && !file_exists($_dirpath)) {

            mkdir($_dirpath, $smarty->_dir_perms === null ? 0777 : $smarty->_dir_perms, true);

        }

        // write to tmp file, then move to overt file lock race condition

        $_tmp_file = $_dirpath . DS . str_replace(array('.', ','), '_', uniqid('wrt', true));

        if (!file_put_contents($_tmp_file, $_contents)) {

            error_reporting($_error_reporting);

            throw new SmartyException("unable to write file {$_tmp_file}");

        }

        /*

         * Windows' rename() fails if the destination exists,

         * Linux' rename() properly handles the overwrite.

         * Simply unlink()ing a file might cause other processes

         * currently reading that file to fail, but linux' rename()

         * seems to be smart enough to handle that for us.

         */

        if (Smarty::$_IS_WINDOWS) {

            // remove original file

            if (is_file($_filepath)) {

                @unlink($_filepath);

            }

            // rename tmp file

            $success = @rename($_tmp_file, $_filepath);

        } else {

            // rename tmp file

            $success = @rename($_tmp_file, $_filepath);

            if (!$success) {

                // remove original file

                if (is_file($_filepath)) {

                    @unlink($_filepath);

                }

                // rename tmp file

                $success = @rename($_tmp_file, $_filepath);

            }

        }

        if (!$success) {

            error_reporting($_error_reporting);

            throw new SmartyException("unable to write file {$_filepath}");

        }

        if ($smarty->_file_perms !== null) {

            // set file permissions

            chmod($_filepath, $smarty->_file_perms);

            umask($old_umask);

        }

        error_reporting($_error_reporting);

        return true;

    }

}