<?php
include "conn.php";
checkLogin("");

/**
 * upload demo for PHP
 * @requires xhEditor
 * 
 * @author Original ASP version by Yanis.Wang<yanis.wang@gmail.com>
 * @author PHP version modified
 * @site http://xheditor.com/
 * @licence LGPL(http://www.opensource.org/licenses/lgpl-license.php)
 * 
 * @Version: 0.9.3 (build 100504)
 *
 * 注1：本程序仅为演示用，请您根据自己需求进行相应修改，或者重开发
 */

header('Content-Type: application/json; charset=UTF-8');

// 配置参数
$inputname = 'filedata';  // 表单文件域name
$attachdir = 'u';         // 上传文件保存路径，结尾不要带/
$dirtype = 2;            // 1:按天存入目录 2:按月存入目录 3:按扩展名存目录
$maxattachsize = 5242880; // 最大上传大小，默认是5M
$upext = 'txt,rar,zip,jpg,jpeg,gif,png,swf,wmv,avi,wma,mp3,mid,pdf'; // 上传扩展名
$msgtype = 2;            // 返回上传参数的格式：1，只返回url，2，返回参数数组
$immediate = $_GET['immediate'] ?? ''; // 立即上传模式，仅为演示用
$id = $_GET['id'] ?? '';

$err = '';
$msg = "''";

// 检查文件上传
if (!isset($_FILES[$inputname])) {
    $err = "无数据提交";
} else if ($_FILES[$inputname]['error'] > 0) {
    switch($_FILES[$inputname]['error']) {
        case 1:
        case 2:
            $err = "文件大小超过 " . $maxattachsize . "字节";
            break;
        case 3:
            $err = "文件只有部分被上传";
            break;
        case 4:
            $err = "没有文件被上传";
            break;
        case 6:
            $err = "找不到临时文件夹";
            break;
        case 7:
            $err = "文件写入失败";
            break;
        default:
            $err = "未知上传错误";
    }
} else if ($_FILES[$inputname]['size'] > $maxattachsize) {
    $err = "文件大小超过 " . $maxattachsize . "字节";
} else {
    $filename = $_FILES[$inputname]['name'];
    $tmpfile = $_FILES[$inputname]['tmp_name'];
    $extension = strtolower(pathinfo($filename, PATHINFO_EXTENSION));
    
    // 检查文件类型
    $allowed_types = explode(',', $upext);
    if (!in_array($extension, $allowed_types)) {
        $err = "上传文件扩展名必需为：" . $upext;
    } else {
        // 确定存储目录
        switch($dirtype) {
            case 1:
                $attach_subdir = "day_" . date('ymd');
                break;
            case 2:
                $attach_subdir = "m" . date('ym');
                break;
            case 3:
                $attach_subdir = "ext_" . $extension;
                break;
        }
        
        $attach_dir = $attachdir . '/' . $attach_subdir . '/';
        
        // 创建目录
        if (!file_exists($attach_dir)) {
            mkdir($attach_dir, 0777, true);
        }
        
        // 生成随机文件名
        $newfilename = date('dHis') . sprintf("%02d", rand(0, 99)) . '.' . $extension;
        $target = $attach_dir . $newfilename;
        
        // 移动文件
        if (move_uploaded_file($tmpfile, $target)) {
            $imgurl = $target;
            if ($immediate == '1') {
                $target = '!' . $target;
            }
            
            if ($msgtype == 1) {
                $msg = "'" . jsonString($target) . "'";
            } else {
                $msg = "{" . 
                       "'url':'" . jsonString($target) . "'," .
                       "'localname':'" . jsonString($filename) . "'," .
                       "'id':'1'" .
                       "}";
            }
        } else {
            $err = "文件上传失败";
        }
    }
}

// 输出结果
$act = $_GET['act'] ?? '';
if ($act == 's') {
    echo "<script>parent.document.getElementById('" . $id . "').value='/system/" . $imgurl . "';location.href='imgUpload.php';</script>";
} else {
    echo json_encode([
        'err' => jsonString($err),
        'msg' => $msg
    ]);
}

/**
 * JSON字符串转义
 */
function jsonString($str) {
    return str_replace(
        ['\\', '/', "'"],
        ['\\\\', '\\/', "\\'"],
        $str
    );
}