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import {Injectable} from '@angular/core';
@Injectable()
export class UtilService {
startTime;
stoppedStatus = true;
constructor() {
}
/*
* 生成uuid算法,碰撞率低于1/2^^122
* @param x 0-9或a-f范围内的一个32位十六进制数
*/
generateUUID() {
let d = new Date().getTime();
let uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, (c) => {
let r = (d + Math.random() * 16) % 16 | 0;
d = Math.floor(d / 16);
return (c === 'x' ? r : (r & 0x3 | 0x8)).toString(16);
});
return uuid;
}
/**
* 计算程序执行时间
* @type {{startTime: {}, timeSpan: number, start: Timer.start, stop: Timer.stop, getTimeSpan: Timer.getTimeSpan}}
*/
start() {
if (this.stoppedStatus) {
this.startTime = new Date().getTime();
this.stoppedStatus = false;
}
}
pause() {
let startTime = this.startTime;
if (startTime) {
let t = new Date().getTime() - startTime;
return t;
} else {
return -1;
}
};
stop() {
let startTime = this.startTime;
if (startTime) {
this.stoppedStatus = true;
let t = new Date().getTime() - startTime;
return t;
} else {
this.stoppedStatus = true;
return -1;
}
}
}