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index.js
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index.js
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const formattingTokens = /(\[[^[]*\])|([-:/.()\s]+)|(A|a|YYYY|YY?|MM?M?M?|Do|DD?|hh?|HH?|mm?|ss?|S{1,3}|z|ZZ?)/g
const match1 = /\d/ // 0 - 9
const match2 = /\d\d/ // 00 - 99
const match3 = /\d{3}/ // 000 - 999
const match4 = /\d{4}/ // 0000 - 9999
const match1to2 = /\d\d?/ // 0 - 99
const matchUpperCaseAMPM = /[AP]M/
const matchLowerCaseAMPM = /[ap]m/
const matchSigned = /[+-]?\d+/ // -inf - inf
const matchOffset = /[+-]\d\d:?\d\d/ // +00:00 -00:00 +0000 or -0000
const matchWord = /\d*[^\s\d-:/.()]+/ // Word
let locale
function offsetFromString(string) {
const parts = string.match(/([+-]|\d\d)/g)
const minutes = +(parts[1] * 60) + +parts[2]
return minutes === 0 ? 0 : parts[0] === '+' ? -minutes : minutes // eslint-disable-line no-nested-ternary
}
const addInput = function (property) {
return function (input) {
this[property] = +input
}
}
const zoneExpressions = [matchOffset, function (input) {
const zone = this.zone || (this.zone = {})
zone.offset = offsetFromString(input)
}]
const expressions = {
A: [matchUpperCaseAMPM, function (input) {
this.afternoon = input === 'PM'
}],
a: [matchLowerCaseAMPM, function (input) {
this.afternoon = input === 'pm'
}],
S: [match1, function (input) {
this.milliseconds = +input * 100
}],
SS: [match2, function (input) {
this.milliseconds = +input * 10
}],
SSS: [match3, function (input) {
this.milliseconds = +input
}],
s: [match1to2, addInput('seconds')],
ss: [match1to2, addInput('seconds')],
m: [match1to2, addInput('minutes')],
mm: [match1to2, addInput('minutes')],
H: [match1to2, addInput('hours')],
h: [match1to2, addInput('hours')],
HH: [match1to2, addInput('hours')],
hh: [match1to2, addInput('hours')],
D: [match1to2, addInput('day')],
DD: [match2, addInput('day')],
Do: [matchWord, function (input) {
const { ordinal } = locale;
[this.day] = input.match(/\d+/)
if (!ordinal) return
for (let i = 1; i <= 31; i += 1) {
if (ordinal(i).replace(/\[|\]/g, '') === input) {
this.day = i
}
}
}],
M: [match1to2, addInput('month')],
MM: [match2, addInput('month')],
MMM: [matchWord, function (input) {
const { months, monthsShort } = locale
const matchIndex = monthsShort
? monthsShort.findIndex(month => month === input)
: months.findIndex(month => month.substr(0, 3) === input)
if (matchIndex < 0) {
throw new Error()
}
this.month = matchIndex + 1
}],
MMMM: [matchWord, function (input) {
const { months } = locale
const matchIndex = months.indexOf(input)
if (matchIndex < 0) {
throw new Error()
}
this.month = matchIndex + 1
}],
Y: [matchSigned, addInput('year')],
YY: [match2, function (input) {
input = +input
this.year = input + (input > 68 ? 1900 : 2000)
}],
YYYY: [match4, addInput('year')],
Z: zoneExpressions,
ZZ: zoneExpressions
}
function correctHours(time) {
const { afternoon } = time
if (afternoon !== undefined) {
const { hours } = time
if (afternoon) {
if (hours < 12) {
time.hours += 12
}
} else if (hours === 12) {
time.hours = 0
}
delete time.afternoon
}
}
function makeParser(format) {
const array = format.match(formattingTokens)
const { length } = array
for (let i = 0; i < length; i += 1) {
const token = array[i]
const parseTo = expressions[token]
const regex = parseTo && parseTo[0]
const parser = parseTo && parseTo[1]
if (parser) {
array[i] = { regex, parser }
} else {
array[i] = token.replace(/^\[|\]$/g, '')
}
}
return function (input) {
const time = {}
for (let i = 0, start = 0; i < length; i += 1) {
const token = array[i]
if (typeof token === 'string') {
start += token.length
} else {
const { regex, parser } = token
const part = input.substr(start)
const match = regex.exec(part)
const value = match[0]
parser.call(time, value)
start += value.length
}
}
correctHours(time)
return time
}
}
const parseFormattedInput = (input, format, utc) => {
try {
const parser = makeParser(format)
const {
year, month, day, hours, minutes, seconds, milliseconds, zone
} = parser(input)
if (zone) {
return new Date(Date.UTC(
year, month - 1, day,
hours || 0,
minutes || 0, seconds || 0, milliseconds || 0
) + (zone.offset * 60 * 1000))
}
const now = new Date()
const y = year || now.getFullYear()
const M = month > 0 ? month - 1 : now.getMonth()
const d = day || now.getDate()
const h = hours || 0
const m = minutes || 0
const s = seconds || 0
const ms = milliseconds || 0
if (utc) {
return new Date(Date.UTC(y, M, d, h, m, s, ms))
}
return new Date(y, M, d, h, m, s, ms)
} catch (e) {
return new Date('') // Invalid Date
}
}
export default (o, C, d) => {
const proto = C.prototype
const oldParse = proto.parse
proto.parse = function (cfg) {
const {
date,
format,
pl,
utc
} = cfg
this.$u = utc
if (format) {
locale = pl ? d.Ls[pl] : this.$locale()
this.$d = parseFormattedInput(date, format, utc)
this.init(cfg)
} else {
oldParse.call(this, cfg)
}
}
}