iview/src/components/time/time.js

/**
 * @param {Number} timeStamp 判断时间戳格式是否是毫秒
 * @returns {Boolean}
 */
// const isMillisecond = timeStamp => {
//     const timeStr = String(timeStamp)
//     return timeStr.length > 10
// }

/**
 * @param {Number} timeStamp 传入的时间戳
 * @param {Number} currentTime 当前时间时间戳
 * @returns {Boolean} 传入的时间戳是否早于当前时间戳
 */
const isEarly = (timeStamp, currentTime) => {
    return timeStamp <= currentTime;
};

/**
 * @param {Number} num 数值
 * @returns {String} 处理后的字符串
 * @description 如果传入的数值小于10，即位数只有1位，则在前面补充0
 */
const getHandledValue = num => {
    return num < 10 ? '0' + num : num;
};

/**
 * @param {Number} timeStamp 传入的时间戳
 * @param {Number} startType 要返回的时间字符串的格式类型，传入'year'则返回年开头的完整时间
 */
const getDate = (timeStamp, startType) => {
    const d = new Date(timeStamp * 1000);
    const year = d.getFullYear();
    const month = getHandledValue(d.getMonth() + 1);
    const date = getHandledValue(d.getDate());
    const hours = getHandledValue(d.getHours());
    const minutes = getHandledValue(d.getMinutes());
    const second = getHandledValue(d.getSeconds());
    let resStr = '';
    if (startType === 'year') resStr = year + '-' + month + '-' + date + ' ' + hours + ':' + minutes + ':' + second;
    else resStr = month + '-' + date + ' ' + hours + ':' + minutes;
    return resStr;
};

/**
 * @param {String|Number} timeStamp 时间戳
 * @returns {String} 相对时间字符串
 */
export const getRelativeTime = timeStamp => {
    // 判断当前传入的时间戳是秒格式还是毫秒
    const IS_MILLISECOND = true;
    // 如果是毫秒格式则转为秒格式
    if (IS_MILLISECOND) Math.floor(timeStamp /= 1000);
    // 传入的时间戳可以是数值或字符串类型，这里统一转为数值类型
    timeStamp = Number(timeStamp);
    // 获取当前时间时间戳
    const currentTime = Math.floor(Date.parse(new Date()) / 1000);
    // 判断传入时间戳是否早于当前时间戳
    const IS_EARLY = isEarly(timeStamp, currentTime);
    // 获取两个时间戳差值
    let diff = currentTime - timeStamp;
    // 如果IS_EARLY为false则差值取反
    if (!IS_EARLY) diff = -diff;
    let resStr = '';
    const dirStr = IS_EARLY ? '前' : '后';
    // 少于等于59秒
    if (diff < 1) resStr = '刚刚';
    else if (diff <= 59) resStr = parseInt(diff) + '秒' + dirStr;
    // 多于59秒，少于等于59分钟59秒
    else if (diff > 59 && diff <= 3599) resStr = Math.ceil(diff / 60) + '分钟' + dirStr;
    // 多于59分钟59秒，少于等于23小时59分钟59秒
    else if (diff > 3599 && diff <= 86399) resStr = Math.ceil(diff / 3600) + '小时' + dirStr;
    // 多于23小时59分钟59秒，少于等于29天59分钟59秒
    else if (diff > 86399 && diff <= 2623859) resStr = Math.ceil(diff / 86400) + '天' + dirStr;
    // 多于29天59分钟59秒，少于364天23小时59分钟59秒，且传入的时间戳早于当前
    else if (diff > 2623859 && diff <= 31567859 && IS_EARLY) resStr = getDate(timeStamp);
    else resStr = getDate(timeStamp, 'year');
    return resStr;
};

export default function (timestamp) {
    return getRelativeTime(timestamp);
}