import http from './http'
import api from './api'
import wx from "weixin-js-sdk";
export default {
    getConfig() {
        http
            .get(api.getWechatConfig, {
                url: window.location.href
            }).then(res => {
                if (res.code == 0) {
                    var config = res.data;
                    wx.config({
                        appId: config.appId, // 必填，公眾號的唯一標識
                        timestamp: config.timestamp, // 必填，生成簽名的時間戳
                        nonceStr: config.nonceStr, // 必填，生成簽名的隨機串
                        signature: config.signature, // 必填，簽名
                        jsApiList: ["checkJsApi", "chooseImage", "previewImage", "getLocalImgData"]
                    });
                }
            });
    },
    selectImg(callback) {
        wx.chooseImage({
            count: 1,
            success(res) {
                var localid = res.localIds[0];
                wx.getLocalImgData({
                    localId: localid,
                    success(res) {
                        var localData = res.localData;
                        if (localData.indexOf("data:image") == 0) {
                            localData = localData.replace("jgp", "jpeg");
                        } else {
                            localData = "data:image/jpeg;base64," + localData.replace(/\n/g, "");
                        }
                        callback(localData);
                    }
                });
            }
        });
    }
}

dataURItoBlob(dataURI) {
    var mimeString = dataURI.split(',')[0].split(':')[1].split(';')[0]; // mime類型
    var byteString = atob(dataURI.split(',')[1]); //base64 解碼
    var arrayBuffer = new ArrayBuffer(byteString.length); //創建緩沖數組
    var intArray = new Uint8Array(arrayBuffer); //創建視圖
    for (var i = 0; i < byteString.length; i++) {
        intArray[i] = byteString.charCodeAt(i);
    }
    return new Blob([intArray], {
        type: mimeString
    });
}

var data = new FormData();
var bob = util.dataURItoBlob(localData);
data.append("hold_pic", bob);