Upstream spencermountain/spacetime state of the touched files before d9eaced13f
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// javascript setX methods like setDate() can't be used because of the local bias
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//these methods wrap around them.
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import ms from '../../data/milliseconds.js'
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import { mapping } from '../../data/months.js'
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import walkTo from './walk.js'
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import { isLeapYear } from '../../fns.js'
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import { getMonthLength } from './_model.js'
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const validate = (n) => {
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//handle number as a string
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if (typeof n === 'string') {
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n = parseInt(n, 10)
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}
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return n
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}
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const order = ['year', 'month', 'date', 'hour', 'minute', 'second', 'millisecond']
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//reduce hostile micro-changes when moving dates by millisecond
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const confirm = (s, tmp, unit) => {
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const n = order.indexOf(unit)
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const arr = order.slice(n, order.length)
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for (let i = 0; i < arr.length; i++) {
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const want = tmp[arr[i]]()
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s[arr[i]](want)
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}
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return s
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}
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// allow specifying setter direction
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const fwdBkwd = function (s, old, goFwd, unit) {
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if (goFwd === true && s.isBefore(old)) {
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s = s.add(1, unit)
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} else if (goFwd === false && s.isAfter(old)) {
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s = s.minus(1, unit)
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}
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return s
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}
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const milliseconds = function (s, n) {
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n = validate(n)
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const current = s.millisecond()
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const diff = current - n //milliseconds to shift by
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return s.epoch - diff
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}
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const seconds = function (s, n, goFwd) {
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n = validate(n)
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const old = s.clone()
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const diff = s.second() - n
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const shift = diff * ms.second
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s.epoch = s.epoch - shift
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s = fwdBkwd(s, old, goFwd, 'minute') // specify direction
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return s.epoch
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}
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const minutes = function (s, n, goFwd) {
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n = validate(n)
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const old = s.clone()
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const diff = s.minute() - n
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const shift = diff * ms.minute
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s.epoch -= shift
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confirm(s, old, 'second')
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s = fwdBkwd(s, old, goFwd, 'hour') // specify direction
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return s.epoch
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}
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const hours = function (s, n, goFwd) {
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n = validate(n)
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if (n >= 24) {
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n = 24
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} else if (n < 0) {
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n = 0
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}
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const old = s.clone()
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let diff = s.hour() - n
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let shift = diff * ms.hour
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s.epoch -= shift
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// oops, did we change the day?
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if (s.date() !== old.date()) {
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s = old.clone()
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if (diff > 1) {
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diff -= 1
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}
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if (diff < 1) {
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diff += 1
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}
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shift = diff * ms.hour
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s.epoch -= shift
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}
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walkTo(s, {
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hour: n
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})
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confirm(s, old, 'minute')
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s = fwdBkwd(s, old, goFwd, 'day') // specify direction
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return s.epoch
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}
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const time = function (s, str, goFwd) {
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let m = str.match(/([0-9]{1,2})[:h]([0-9]{1,2})(:[0-9]{1,2})? ?(am|pm)?/)
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if (!m) {
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//fallback to support just '2am'
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m = str.match(/([0-9]{1,2}) ?(am|pm)/)
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if (!m) {
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return null // invalid time string - mark as invalid
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}
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m.splice(2, 0, '0') //add implicit 0 minutes
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m.splice(3, 0, '') //add implicit seconds
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}
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let h24 = false
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let hour = parseInt(m[1], 10)
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let minute = parseInt(m[2], 10)
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if (minute >= 60) {
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minute = 59
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}
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if (hour > 12) {
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h24 = true
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}
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//make the hour into proper 24h time
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if (h24 === false) {
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if (m[4] === 'am' && hour === 12) {
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//12am is midnight
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hour = 0
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}
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if (m[4] === 'pm' && hour < 12) {
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//12pm is noon
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hour += 12
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}
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}
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// handle seconds
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m[3] = m[3] || ''
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m[3] = m[3].replace(/:/, '')
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const sec = parseInt(m[3], 10) || 0
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const old = s.clone()
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s = s.hour(hour)
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s = s.minute(minute)
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s = s.second(sec)
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s = s.millisecond(0)
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s = fwdBkwd(s, old, goFwd, 'day') // specify direction
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return s.epoch
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}
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const date = function (s, n, goFwd) {
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n = validate(n)
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//avoid setting february 31st (leap-aware, same as add())
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if (n > 28) {
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const max = getMonthLength(s.month(), s.year())
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if (n > max) {
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n = max
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}
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}
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//avoid setting < 0
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if (n <= 0) {
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n = 1
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}
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const old = s.clone()
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walkTo(s, {
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date: n
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})
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s = fwdBkwd(s, old, goFwd, 'month') // specify direction
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return s.epoch
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}
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const month = function (s, n, goFwd) {
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if (typeof n === 'string') {
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if (n === 'sept') {
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n = 'sep'
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}
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n = mapping()[n.toLowerCase()]
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}
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n = validate(n)
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//don't go past december
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if (n >= 12) {
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n = 11
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}
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if (n <= 0) {
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n = 0
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}
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let d = s.date()
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//there's no 30th of february, etc. (leap-aware, same as add())
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const max = getMonthLength(n, s.year())
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if (d > max) {
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//make it as close as we can..
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d = max
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}
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const old = s.clone()
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walkTo(s, {
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month: n,
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date: d
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})
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s = fwdBkwd(s, old, goFwd, 'year') // specify direction
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return s.epoch
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}
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const year = function (s, n) {
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// support '97
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if (typeof n === 'string' && /^'[0-9]{2}$/.test(n)) {
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n = n.replace(/'/, '').trim()
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n = Number(n)
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// '89 is 1989
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if (n > 30) {
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//change this in 10y
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n = 1900 + n
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} else {
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// '12 is 2012
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n = 2000 + n
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}
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}
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n = validate(n)
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walkTo(s, {
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year: n
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})
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return s.epoch
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}
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const week = function (s, n, goFwd) {
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const old = s.clone()
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n = validate(n)
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// don't set week=1, if we're already week=1 in late december
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// because this could send us to another year
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if (n === 1) {
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if (s.monthName() === 'december' && s.date() >= 29) {
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if (s.week() === 1) {
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return s
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}
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}
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}
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// get the first week of the year
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s = s.month(0)
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s = s.date(1)
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s = s.day('monday', false)//go backwards to monday
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// did we go back too far?
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if (s.monthName() === 'december' && s.date() < 29) {
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s = s.add(1, 'week')
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}
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n -= 1 //1-based
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s = s.add(n, 'weeks')
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s = fwdBkwd(s, old, goFwd, 'year') // specify direction
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return s
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}
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const dayOfYear = function (s, n, goFwd) {
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n = validate(n)
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const old = s.clone()
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n -= 1 //days are 1-based
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if (n <= 0) {
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n = 0
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} else if (n >= 365) {
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if (isLeapYear(s.year())) {
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n = 365
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} else {
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n = 364
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}
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}
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s = s.startOf('year')
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s = s.add(n, 'day')
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confirm(s, old, 'hour')
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s = fwdBkwd(s, old, goFwd, 'year') // specify direction
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return s.epoch
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}
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export {
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milliseconds,
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seconds,
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minutes,
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hours,
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time,
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date,
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month,
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year,
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week,
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dayOfYear,
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}
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