"use strict";

const Service = require("egg").Service;
const OSS = require('ali-oss');
function fileToBlob(file) {
    // 创建 FileReader 对象
    let reader = new FileReader();
    return new Promise(resolve => {
        // FileReader 添加 load 事件
        reader.addEventListener('load', (e) => {
            let blob;
            if (typeof e.target.result === 'object') {
                blob = new Blob([e.target.result])
            } else {
                blob = e.target.result
            }
            resolve(blob)
        })
        // FileReader 以 ArrayBuffer 格式 读取 File 对象中数据
        reader.readAsArrayBuffer(file)
    })
}



class ImageService extends Service {
    /**
     * 保存图片
     * @param {*} showPath 图片展示路径
     * @param {*} dicomInfo dicom信息
     * @param {*} user_id user_id
     */
    async downloadImage(path, osPath, config) {
        try {
            const client = new OSS({
                region: config.region,
                accessKeyId: config.accessKeyId,
                accessKeySecret: config.accessKeySecret,
                bucket: config.bucket
            });
            const result = await client.get(path, osPath);
            return result
        } catch (e) {
            console.log(e)
        }
    }
    async dcmUpload (name, file, config){
        const client = new OSS({
            region: config.region,
            accessKeyId: config.accessKeyId,
            accessKeySecret: config.accessKeySecret,
            bucket: config.bucket
        });
        return new Promise(async resolve => {
            try {
                let res = await client.put(name, file)
                resolve({
                    ...res,
                })
            } catch (e) {
                resolve(false)
                console.log(e)
            }
        })
    }
}
module.exports = ImageService;