报警列表,持续时间动态计算
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113
src/utils/timeConverter.ts
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113
src/utils/timeConverter.ts
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/**
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* 时间转换工具类
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* 提供时间格式化、时间差计算等功能
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*/
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export class TimeConverter {
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/**
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* 检查时间字符串是否有效
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* @param timeStr 时间字符串
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* @returns 是否有效的时间
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*/
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static isValidTime(timeStr: string): boolean {
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if (!timeStr) return false;
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return !isNaN(new Date(timeStr).getTime());
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}
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/**
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* 格式化时间
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* @param timeStr 时间字符串
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* @param format 格式,可选值: 'YYYY-MM-DD', 'HH:mm:ss', 'YYYY-MM-DD HH:mm:ss'
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* @returns 格式化后的时间字符串
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*/
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static formatTime(timeStr: string, format: 'YYYY-MM-DD' | 'HH:mm:ss' | 'YYYY-MM-DD HH:mm:ss' = 'YYYY-MM-DD HH:mm:ss'): string {
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if (!this.isValidTime(timeStr)) return '无效时间';
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const date = new Date(timeStr);
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const year = date.getFullYear();
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const month = this.padZero(date.getMonth() + 1);
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const day = this.padZero(date.getDate());
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const hours = this.padZero(date.getHours());
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const minutes = this.padZero(date.getMinutes());
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const seconds = this.padZero(date.getSeconds());
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switch (format) {
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case 'YYYY-MM-DD':
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return `${year}-${month}-${day}`;
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case 'HH:mm:ss':
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return `${hours}:${minutes}:${seconds}`;
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case 'YYYY-MM-DD HH:mm:ss':
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default:
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return `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`;
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}
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}
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/**
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* 计算与当前时间的差值(格式为 HH:mm:ss)
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* @param startTimeStr 起始时间字符串
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* @returns 格式化的时间差字符串
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*/
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static calculateTimeDiff(startTimeStr: string): string {
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if (!this.isValidTime(startTimeStr)) return '';
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const startTime = new Date(startTimeStr).getTime();
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const nowTime = new Date().getTime();
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const diffMs = nowTime - startTime;
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// 处理未来时间
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if (diffMs < 0) {
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return '00:00:00';
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}
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// 计算总秒数
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const totalSeconds = Math.floor(diffMs / 1000);
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// 计算时、分、秒
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const hours = this.padZero(Math.floor(totalSeconds / 3600));
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const minutes = this.padZero(Math.floor((totalSeconds % 3600) / 60));
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const seconds = this.padZero(totalSeconds % 60);
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return `${hours}:${minutes}:${seconds}`;
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}
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/**
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* 数字补零
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* @param num 数字
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* @returns 补零后的字符串
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*/
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private static padZero(num: number): string {
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return num < 10 ? `0${num}` : num.toString();
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}
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/**
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* 创建一个时间差更新定时器
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* @param startTimeStr 起始时间字符串
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* @param callback 回调函数,接收计算后的时间差
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* @param interval 刷新间隔(毫秒)
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* @returns 定时器ID,用于清除定时器
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*/
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static createTimeDiffTimer(
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startTimeStr: string,
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callback: (diffText: string) => void,
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interval: number = 1000
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): number {
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// 立即执行一次
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callback(this.calculateTimeDiff(startTimeStr));
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// 设置定时器
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const timerId = window.setInterval(() => {
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callback(this.calculateTimeDiff(startTimeStr));
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}, interval);
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return timerId;
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}
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/**
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* 清除时间差更新定时器
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* @param timerId 定时器ID
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*/
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static clearTimeDiffTimer(timerId: number | null): void {
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if (timerId) {
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clearInterval(timerId);
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}
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}
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}
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