<?php


use Aws\S3\S3Client;
use Model\Main\Config\DbModel;

class AwsOss
{
    const IMG = 1;
    const MP4_VIDEO = 2;

    /**
     * 获取解密后 base64文件
     * @cli php cli.php Test getObjectUrl
     * @param string $url
     * @param int $fileType 1 图片 2 mp4视频
     * @return string
     * @throws \Exception
     */
    public static function getUrlBase64(string $url, int $fileType)
    {
        $config = DbModel::formatDbConfig(AwsOss::AWS_OSS_PUBLIC_TAG);

        return self::getKycBase64File($url, $config, $fileType);
    }

    /**
     * 获取二进制加密文件
     * @param $url
     * @param array $config aws 桶配置
     * @param int $fileType 1 图片类型 2 视频类型(mp4)
     * @return string
     * @throws \Exception
     */
    private static function getKycBase64File($url, array $config, $fileType = self::IMG)
    {
        $bucket = $config['bucket'];
        $sdKParams = $config['sdk_params'];

        $fileKey = trim(parse_url($url)['path'], '/'); // 一定不能带 /

        $s3Client = new S3Client($sdKParams);
        // 下载文件资源
        $result = $s3Client->getObject(['Bucket' => $bucket, 'Key' => $fileKey]);

        $fileSourceObj = $result['Body'] ?? "";
        if ('' === $fileSourceObj) {
            throw new \Exception('文件资源拉取失败');
        }

        if ($fileType == 1) {
            $type = getimagesizefromstring($fileSourceObj)['mime']; //获取二进制流图片格式
        } else {
            $type = 'audio/mp4';
        }

        return 'data:' . $type . ';base64,' . chunk_split(base64_encode($fileSourceObj));
    }

}