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import {Injectable} from "@angular/core";
import {AlertController, ToastController} from "@ionic/angular";
import {File} from "@ionic-native/file/ngx";
import {FileOpener} from "@ionic-native/file-opener/ngx";
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@Injectable()
export class CommonService{
constructor(public toastCtrl:ToastController,public alertCtrl:AlertController,
private file: File, private fileOpener: FileOpener){}
/**
* JSON格式数据转化为字符串 接口调用
* @param data json格式的数据
* @returns {string}
*/
toQuery(data){
let str = '';
for (let key in data) {
if (data.hasOwnProperty(key)) {
const value = data[key];
str += key + '=' + value + '&';
}
}
str = str.substring(0, str.length - 1);
return str;
}
/**
* JSON格式对象转为form表单的格式，用来接口传递数据
* @param json 需要转化的json
* @returns {FormData} formData数据
*/
toFormData(json){
let formData = new FormData();
for(let k in json){
formData.append(k,json[k])
}
return formData;
}
/**
* 提示信息 位置：居中，延时2s
* @param message 提示文字
* @param callback 提示信息之后执行的方法
*/
async toast(message, callback?) {
let toast = await this.toastCtrl.create({
message: message,
if (callback) {
callback();
}
}
/**
* alert弹窗
* @param message 弹窗内的文字
* @param callback 如果有回调方法 就有确定、取消两个按钮，没有回调方法 则只有确认一个按钮
*/
async alert(message, callback?) {
if (callback) {
let alert = await this.alertCtrl.create({
message: message,
buttons: ['取消', {
text: "确定",
handler: data => {
callback();
}
}]
});
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}
}
/**
* 下载文件
* @param url 文件URL
*/
downloadFile(fileID,fileName) {
const xhr = new XMLHttpRequest();
const fileType = this.getFileMimeType(fileName);
const url = encodeURI(environment.domain + '/wisdomgroup/modules/common/file/download/' + fileID);
xhr.open('GET',url);
xhr.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
xhr.responseType = "blob";
xhr.addEventListener("loadstart",(ev)=>{
})
xhr.addEventListener("progress",(ev)=>{
let progress = Math.round(100.0 * ev.loaded / ev.total);
// alert(progress);
})
xhr.addEventListener("load",(ev)=>{
const blob = xhr.response;
if(blob){
let path = this.file.externalDataDirectory;
this.file.writeFile(path,fileName,blob,{ //写入文件
replace:true
}).then(
()=>{
this.fileOpener.open(path + fileName, fileType).catch((err) => {
this.alert('打开文件失败！'+err);
})
}).catch((err)=>{
this.toast("下载文件失败！")
})
}
});
xhr.addEventListener("loadend", (ev) => {
// 结束下载事件
});
xhr.addEventListener("error", (ev) => {
this.alert('下载文件失败！');
});
xhr.addEventListener("abort", (ev) => {
});
xhr.send();
}
//获取文件类型
getFileMimeType(fileName: string): string {
let fileType = fileName.substring(fileName.lastIndexOf('.') + 1, fileName.length).toLowerCase();
let mimeType: string = '';
switch (fileType) {
case 'txt':
mimeType = 'text/plain';
break;
case 'docx':
mimeType = 'application/vnd.openxmlformats-officedocument.wordprocessingml.document';
break;
case 'doc':
mimeType = 'application/msword';
break;
case 'pptx':
mimeType = 'application/vnd.openxmlformats-officedocument.presentationml.presentation';
break;
case 'ppt':
mimeType = 'application/vnd.ms-powerpoint';
break;
case 'xlsx':
mimeType = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet';
break;
case 'xls':
mimeType = 'application/vnd.ms-excel';
break;
case 'zip':
mimeType = 'application/x-zip-compressed';
break;
case 'rar':
mimeType = 'application/octet-stream';
break;
case 'pdf':
mimeType = 'application/pdf';
break;
case 'jpg':
mimeType = 'image/jpeg';
break;
case 'png':
mimeType = 'image/png';
break;
default:
mimeType = 'application/' + fileType;
break;
}
return mimeType;
}
/**
* 定义全局的log日志 开发模式 打印log 生产环境 关闭
* @param message 日志信息
*/
log(message){
if(environment.domain === ""){ //开发环境时
console.log(message);
}
}
}