<?php
/**
 *
 * createZip - 创建压缩包，for文件夹／文件
 *
 * @param type string-or-array $from
 *        => 字符串 '/path/to/source/file/or/folder/'
 *        => 或者 包含字符串的数组  array('fileA','FolderA','fileB')
 * @param type string $to
 *        => 字符串 '/path/to/output.zip'
 * @return array
 *        => array(
 *             'success' => false,        //备份成功返回1
 *             'message' => '失败原因',
 *             'data' => array(
 *                 'zipFile' => array(zip文件的信息)
 *             )
 *           )
 *
 *
 */
class Zipdump{
    function createZip($from, $to) {
        /* Init */
        $return = array(
            'success' => false,
            'message' => '',
            'data' => array(
                'zipFile' => array(
                    'name' => '',
                    'path_relative' => '',
                    'path_absolute' => '',
                    'url' => '', // 自己添加吧
                    'size' => '',
                    'exists_before' => false
                )
            )
        );

        /* Check zip class */
        if (!class_exists('ZipArchive')) {
            $return['message'] = 'Missing ZipArchive module in server.';
            return $return;
        }

        /* Check right of write for target zip file */
        $zip = new ZipArchive();
        //dd($zip);die;
        if (!is_dir(dirname($to))) {
            mkdir(dirname($to), 0755, TRUE);
        }
        if (is_file($to)) {
            $return['data']['zipFile']['exists_before'] = true;
            if ($zip->open($to, ZIPARCHIVE::OVERWRITE) !== TRUE) {
                $return['message'] = "Cannot overwrite: {$to}";
                return $return;
            }
        } else {
            if ($zip->open($to, ZIPARCHIVE::CREATE) !== TRUE) {
                $return['message'] = "Could not create archive: {$to}";
                return $return;
            }
        }


        /* Check path of source files or folder */
        $source_path_including_dir = array();
        $prefix_relative_path_for_source = '';
        if (is_array($from)) {
            foreach ($from as $path) {
                if (file_exists($path)) {
                    if ($prefix_relative_path_for_source == '') {
                        $prefix_relative_path_for_source = (is_dir($path)) ? realpath($path) : realpath(dirname($path));
                    }
                    $source_path_including_dir[] = $path;
                } else {
                    $return['message'] = 'No such file or folder: ' . $path;
                    return $return;
                }
            }
        } elseif (file_exists($from)) {
            $prefix_relative_path_for_source = (is_dir($from)) ? realpath($from) : realpath(dirname($from));
            $source_path_including_dir[] = $from;
        } else {
            $return['message'] = 'No such file or folder: ' . $from;
            return $return;
        }
        $prefix_relative_path_for_source = rtrim($prefix_relative_path_for_source, '/') . '/';


        /* Get final list of files, no folder */
        $final_list_of_files = array();
        foreach ($source_path_including_dir as $path) {
            if (is_file($path)) {
                /* File */
                $final_list_of_files[] = $path;
            } else {
                /* Folder */
                $list_of_files = self::recursive_get_files_by_path_of_folder($path);
                foreach ($list_of_files as $one) {
                    $final_list_of_files[] = $one;
                }
            }
        }
        if (!count($final_list_of_files)) {
            $return['message'] = 'No valid file or folder used to zip';
            return $return;
        }


        /* Begin to add to zip file */
        foreach ($final_list_of_files as $one_file) {
            $zip->addFile($one_file, str_replace($prefix_relative_path_for_source, '', $one_file));
        }
        $zip->close();

        /* Return */
        $return['success'] = true;
        $return['data']['zipFile']['name'] = pathinfo($to, PATHINFO_BASENAME);
        $return['data']['zipFile']['path_relative'] = $to;
        $return['data']['zipFile']['path_absolute'] = realpath($to);
        $return['data']['zipFile']['size'] = number_format(abs(filesize($to) / 1024), 2) . ' KB';
        return $return;
    }


    /**
     * 获取文件夹下的文件列表，遍历模式
     *
     * @param type $dir
     * @param type $is_tree
     * @return string
     */
    function recursive_get_files_by_path_of_folder($dir, $is_tree = false) {
        $files = array();
        $dir = preg_replace('/[\/]{1}$/i', '', $dir);
        if (is_dir($dir)) {
            if ($handle = opendir($dir)) {
                while (($file = readdir($handle)) !== false) {
                    if ($file != "." && $file != "..") {
                        if (is_dir($dir . "/" . $file)) {
                            $sub_list = self::recursive_get_files_by_path_of_folder($dir . "/" . $file, $is_tree);
                            if ($is_tree) {
                                $files[$file] = $sub_list;
                            } else {
                                foreach ($sub_list as $one_sub_file) {
                                    $files[] = $one_sub_file;
                                }
                            }
                        } else {
                            $files[] = $dir . "/" . $file;
                        }
                    }
                }
                closedir($handle);
                return $files;
            }
        } else {
            $files[] = $dir;
            return $files;
        }
    }


    /************************************************
     * 参数$from的可选形式：
     * $from = array('A.php', 'B.php', 'C.php', './folderName/')
     * $from = './folderName/';
     * $from = 'xxx.txt';
     */
    function unzipdir($fromzip,$dir){
        $zip = new ZipArchive();
        $res = $zip->open($fromzip);
        if($res) {
            // 解压缩文件到指定目录
            $zip->extractTo($dir);
            $zip->close();
        }
    }


    //$from = './folderName/';
    //$to = './res/tmp.zip';
    //$zip_result = createZip($from, $to);
    //print_r($zip_result);
}