<?php
namespace utils;

use think\facade\Env;
use Qiniu\Auth;
use Qiniu\Storage\UploadManager;

/**
 * 七牛云上传
 * Class QiniuUploader
 * @package utils
 */
class QiniuUploader
{
    protected $bucket = 'orico-cms';
    protected $accessKey = 'dOsTum4a5qvhPTBbZRPX0pIOU7PZWRX7htKjztms';
    protected $secretKey = 'KFxsGbnErkALFfeGdMa8QWTdodJbamMX0iznLe-q';

    protected $rule = [
        'fileSize' => 1024 * 1024 * 5, // 默认最大上传5M
        'fileExt' => 'jpeg,jpg,png', // 默认上传文件后缀
        'fileMime' => 'image/jpeg,image/png,image/gif' // 默认上传文件mime
    ];

    protected $dir = true;
    protected $originalName = false;
    protected $pathPrefix = '';
    protected $fileNamePrefix = 'cms_';

    protected $domain = '';

    public function __construct($conf = [])
    {
        $this->domain = Env::get("QINIU.cdn");
        if (!empty($conf['bucket'])) {
            $this->bucket = $conf['bucket'];
        }
        if (!empty($conf['accessKey'])) {
            $this->accessKey = $conf['accessKey'];
        }
        if (!empty($conf['secretKey'])) {
            $this->secretKey = $conf['secretKey'];
        }
        if (!empty($conf['pathPrefix'])) {
            $this->pathPrefix = trim($conf['pathPrefix'], '/');
        }
    }

    /**
     * 生成随机字符串
     */
    private function random($length, $type="string", $convert="0")
    {
        $conf = [
            'number' => '0123456789',
            'string' => 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ',
            'all' => 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789='
        ];
        $string = $conf[$type];
        if(!$string) {
            $string = $conf['string'];
        }
        $strlen = strlen($string) - 1;
        $char = '';
        for($i=0; $i<$length; $i++) {
            $char .= $string[mt_rand(0, $strlen)];
        }
        if($convert > 0) {
            $res = strtoupper($char);
        } elseif ($convert == 0) {
            $res = $char;
        } elseif ($convert < 0) {
            $res = strtolower($char);
        }
        return $res;
    }

    /**
     * 组装文件名
     */
    private function buildFileName() 
    {
        return $this->fileNamePrefix . time().substr(time(),-5).substr(microtime(),2,3) . $this->random(8);
    }

    /**
     * 上传验证规则
     */
    public function validate($rule) 
    {
        $this->rule = $rule;
    }

    /**
     * 上传文件到七牛云
     * @param $name
     * @param bool $multi 多文件模式
     * @param int $num  多文件模式文件数量
     * @return array
     * @throws \Exception
     */
    public function uploadFile($name,$multi=false,$num = 1)
    {
        // 构建鉴权对象
        $auth = new Auth($this->accessKey, $this->secretKey);

        // 生成上传 Token
        $token = $auth->uploadToken($this->bucket);

        // 初始化 UploadManager 对象并进行文件的上传。
        $uploadMgr = new UploadManager();

        $data = [];
        if (false === $multi) {
            $file = request()->file($name);
            $data = $this->doFileToQn($file, $uploadMgr, $token);
        } else {
            for ($i = 0;  $i < $num; $i++) {
                $file = request()->file($name)[$i];
                $data[] = $this->doFileToQn($file, $uploadMgr, $token);
            }
        }
        return $data;


    }


    /**
     * 七牛云上传本地文件,并且本地相对路由和七牛云路径完全一致
     * @param string $fullName 文件名称带全路径。/www/wwwroot/test.yulinzhihou.com/public/ueditor/php/upload/file/20210424/1619232876970230.png
     * @param string $relativePath 相对路径，注意：前面不能以斜杠开头 如：ueditor/php/upload/file/20210424/1619232876970230.png
     * @return array
     * @throws \Exception
     */
    public function uploadLocalFile($fullName,$relativePath)
    {
        // 构建鉴权对象
        $auth = new Auth($this->accessKey, $this->secretKey);
        // 生成上传 Token
        $token = $auth->uploadToken($this->bucket);
        // 初始化 UploadManager 对象并进行文件的上传。
        $uploadMgr = new UploadManager();
        $file = ltrim($relativePath,'\/');
        list($ret, $err) = $uploadMgr->putFile($token,$file,$fullName);
        if ($err !== null) {
            throw new \Exception($err);
        } else {
            return ['hash'=>$ret['hash'], 'filename'=>$ret['key'], 'remote_url'=>$this->domain . $ret['key']];
        }

    }

    /**
     * @param $file
     * @param UploadManager $uploadMgr
     * @param string $token
     * @return array
     * @throws \Exception
     */
    private function doFileToQn($file, UploadManager $uploadMgr, string $token): array
    {
        $aspectRatio = [];
        if (!empty($this->rule['aspectRatio'])) {
            $aspectRatio = $this->rule['aspectRatio'];
            unset($this->rule['aspectRatio']);
        }

        $fileName = $file->getOriginalName(); // 文件原名

        if (!$this->originalName) {
            $fileName = $this->buildFileName() . '.' . $file->extension();
            if (!$this->dir && !empty($this->pathPrefix)) {
                $fileName = $this->pathPrefix . '/' . $fileName;
            }
        }

        if ($this->dir) {
            $fileName = date('Y') . '/' . date('m') . '/' . date('d') . '/' . $fileName;
            if (!empty($this->pathPrefix)) {
                $fileName = $this->pathPrefix . '/' . $fileName;
            }
        }

        $filePath = $file->getPathname(); // 临时路径
        if (!empty($aspectRatio)) { // 验证图片宽高
            list($width, $height, $type, $attr) = getimagesize($file);
            if ($width != $aspectRatio['width'] || $height != $aspectRatio['height']) {
                throw new \Exception('图片宽高不符合');
            }
        }
        $fileType = $file->getOriginalMime();
        list($ret, $err) = $uploadMgr->putFile($token, $fileName, $filePath, null, $fileType, false);
        if ($err !== null) {
            throw new \Exception($err);
        } else {
            return ['hash' => $ret['hash'], 'filename' => $ret['key'], 'remote_url' => $this->domain . $ret['key']];
        }
    }
}