import ot from 'dayjs'
import get from 'lodash-es/get.js'
import isbol from './isbol.mjs'
import isfun from './isfun.mjs'
import istimemsTZ from './istimemsTZ.mjs'
//core, 實際計算; 抽為獨立函數以便由呼叫端統一以try catch攔截非預期錯誤, 而不必將整段運算內縮
function core(t, tNow) {
//mnow
let mnow = ot()
if (istimemsTZ(tNow)) {
mnow = ot(tNow, 'YYYY-MM-DDTHH:mm:ss.SSSZ') //統一轉+00:00時區再計算時間差
}
//mtime
let mtime = ot(t, 'YYYY-MM-DDTHH:mm:ss.SSSZ') //統一轉+00:00時區再計算時間差
//check
if (mnow > mtime) {
return {
today: null,
msg: '',
err: '時間已過',
}
}
//day
let nowday = mnow.format('YYYY-MM-DD')
let timeday = mtime.format('YYYY-MM-DD')
let mnowday = ot(nowday, 'YYYY-MM-DD')
let mtimeday = ot(timeday, 'YYYY-MM-DD')
//diff
let iseconds = mtime.diff(mnow, 'seconds')
let iminutes = mtime.diff(mnow, 'minutes')
let ihours = mtime.diff(mnow, 'hours')
let idays = mtimeday.diff(mnowday, 'days')
let iweeks = mtimeday.diff(mnowday, 'weeks')
let imonths = mtimeday.diff(mnowday, 'months')
let iyears = mtimeday.diff(mnowday, 'years')
//c
let today
let c = '即將到來'
if (iseconds >= 0) {
today = true
c = iseconds + '秒後'
}
if (iminutes > 0) {
today = true
c = iminutes + '分鐘後'
}
if (ihours > 0) {
let hm = mtime.format('HH:mm')
if (nowday === timeday) {
today = true
c = ihours + '小時後' + '，今天' + hm
}
else {
today = false
c = ihours + '小時後' + '，明天' + hm
}
}
if (idays > 1) {
today = false
if (idays === 2) {
c = '後天'
}
else {
c = idays + '天後'
}
}
if (iweeks > 0) {
today = false
c = iweeks + '周後'
}
if (imonths > 0) {
today = false
c = imonths + '個月後'
}
if (iyears > 0) {
today = false
c = iyears + '年後'
}
return {
today,
msg: c,
err: '',
}
}
/**
* 毫秒時間轉到期時間
*
* Unit Test: {@link https://github.com/yuda-lyu/wsemi/blob/master/test/timemsTZ2expire.test.mjs Github}
* @memberOf wsemi
* @param {String} t 輸入毫秒時間字串
* @param {String} [tNow=null] 輸入現在毫秒時間字串
* @param {Object} [opt={}] 輸入設定物件，預設{}
* @param {Boolean} [opt.returnWithStateAndMsg=false] 輸入是否回傳含狀態與訊息物件布林值，若為true則回傳{ state, msg }物件，state為'success'或'error'，msg於success時為回傳結果、於error時為錯誤訊息字串，預設false
* @returns {Object} 回傳物件，含today、msg、err三欄位；t非有效毫秒時間字串時回傳{ today: null, msg: '', err: '時間格式錯誤' }，時間已過時回傳{ today: null, msg: '', err: '時間已過' }；若opt.returnWithStateAndMsg為true則回傳{ state, msg }物件，其中時間已過屬算得之結果故state仍為'success'
* @example
*
* let t
* let tNow = '2020-10-18T12:34:56.987+08:00'
* let r
*
* t = '2020-10-18T12:34:58.987+08:00'
* r = timemsTZ2expire(t, tNow)
* console.log(r)
* // => { today: true, msg: '2秒後', err: '' }
*
* t = '2020-10-18T04:34:58.987+00:00'
* r = timemsTZ2expire(t, tNow)
* console.log(r)
* // => { today: true, msg: '2秒後', err: '' }
*
* t = '2020-10-18T04:34:58.987Z'
* r = timemsTZ2expire(t, tNow)
* console.log(r)
* // => { today: true, msg: '2秒後', err: '' }
*
* t = '2020-10-18T12:34:58.123+08:00'
* r = timemsTZ2expire(t, tNow)
* console.log(r)
* // => { today: true, msg: '1秒後', err: '' }
*
* t = '2020-10-18T12:37:58.987+08:00'
* r = timemsTZ2expire(t, tNow)
* console.log(r)
* // => { today: true, msg: '3分鐘後', err: '' }
*
* t = '2020-10-18T16:37:58.987+08:00'
* r = timemsTZ2expire(t, tNow)
* console.log(r)
* // => { today: true, msg: '4小時後，今天16:37', err: '' }
*
* t = '2020-10-23T16:37:58.987+08:00'
* r = timemsTZ2expire(t, tNow)
* console.log(r)
* // => { today: false, msg: '5天後', err: '' }
*
* t = '2021-04-23T16:37:58.987+08:00'
* r = timemsTZ2expire(t, tNow)
* console.log(r)
* // => { today: false, msg: '6個月後', err: '' }
*
* t = '2028-04-23T16:37:58.987+08:00'
* r = timemsTZ2expire(t, tNow)
* console.log(r)
* // => { today: false, msg: '7年後', err: '' }
*
* t = '2018-04-23T16:37:58.987+08:00'
* r = timemsTZ2expire(t, tNow)
* console.log(r)
* // => { today: null, msg: '', err: '時間已過' }
*
*/
function timemsTZ2expire(t, tNow = null, opt = {}) {
//returnWithStateAndMsg
let returnWithStateAndMsg = get(opt, 'returnWithStateAndMsg', null)
if (!isbol(returnWithStateAndMsg)) {
returnWithStateAndMsg = false
}
//retSuccess, 算得之結果(含err為'時間已過'者)皆屬成功, 該err為業務結果而非轉換失敗
let retSuccess = (v) => {
if (returnWithStateAndMsg) {
return {
state: 'success',
msg: v,
}
}
else {
return v
}
}
//retError, 預設模式沿用既有之{ today, msg, err }失敗形狀與其中文說明, 不改變既有行為
let retError = (msg, errText) => {
if (returnWithStateAndMsg) {
return {
state: 'error',
msg,
}
}
else {
return {
today: null,
msg: '',
err: errText,
}
}
}
//check
if (!isfun(ot)) {
throw new Error(`invalid dayjs`)
}
//check
if (!istimemsTZ(t)) {
return retError('invalid t', '時間格式錯誤')
}
//r, 須攔截非預期錯誤(如dayjs解析或格式化異常), 否則會外拋至呼叫端
let r = null
try {
r = core(t, tNow)
}
catch (err) {
return retError(err.toString(), '時間轉換失敗')
}
return retSuccess(r)
}
export default timemsTZ2expire