/* eslint no-extend-native: 0 */
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(function () {
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// Defining locale
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Date.shortMonths = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
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Date.longMonths = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December']
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Date.shortDays = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat']
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Date.longDays = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday']
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// Defining patterns
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var replaceChars = {
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// Day
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d: function () { var d = this.getDate(); return (d < 10 ? '0' : '') + d },
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D: function () { return Date.shortDays[this.getDay()] },
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j: function () { return this.getDate() },
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l: function () { return Date.longDays[this.getDay()] },
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N: function () { var N = this.getDay(); return (N === 0 ? 7 : N) },
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S: function () { var S = this.getDate(); return (S % 10 === 1 && S !== 11 ? 'st' : (S % 10 === 2 && S !== 12 ? 'nd' : (S % 10 === 3 && S !== 13 ? 'rd' : 'th'))) },
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w: function () { return this.getDay() },
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z: function () { var d = new Date(this.getFullYear(), 0, 1); return Math.ceil((this - d) / 86400000) },
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// Week
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W: function () {
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var target = new Date(this.valueOf())
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var dayNr = (this.getDay() + 6) % 7
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target.setDate(target.getDate() - dayNr + 3)
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var firstThursday = target.valueOf()
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target.setMonth(0, 1)
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if (target.getDay() !== 4) {
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target.setMonth(0, 1 + ((4 - target.getDay()) + 7) % 7)
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}
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var retVal = 1 + Math.ceil((firstThursday - target) / 604800000)
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return (retVal < 10 ? '0' + retVal : retVal)
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},
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// Month
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F: function () { return Date.longMonths[this.getMonth()] },
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m: function () { var m = this.getMonth(); return (m < 9 ? '0' : '') + (m + 1) },
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M: function () { return Date.shortMonths[this.getMonth()] },
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n: function () { return this.getMonth() + 1 },
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t: function () {
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var year = this.getFullYear()
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var nextMonth = this.getMonth() + 1
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if (nextMonth === 12) {
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year = year++
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nextMonth = 0
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}
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return new Date(year, nextMonth, 0).getDate()
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},
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// Year
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L: function () { var L = this.getFullYear(); return (L % 400 === 0 || (L % 100 !== 0 && L % 4 === 0)) },
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o: function () { var d = new Date(this.valueOf()); d.setDate(d.getDate() - ((this.getDay() + 6) % 7) + 3); return d.getFullYear() },
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Y: function () { return this.getFullYear() },
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y: function () { return ('' + this.getFullYear()).substr(2) },
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// Time
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a: function () { return this.getHours() < 12 ? 'am' : 'pm' },
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A: function () { return this.getHours() < 12 ? 'AM' : 'PM' },
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B: function () { return Math.floor((((this.getUTCHours() + 1) % 24) + this.getUTCMinutes() / 60 + this.getUTCSeconds() / 3600) * 1000 / 24) },
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g: function () { return this.getHours() % 12 || 12 },
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G: function () { return this.getHours() },
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h: function () { var h = this.getHours(); return ((h % 12 || 12) < 10 ? '0' : '') + (h % 12 || 12) },
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H: function () { var H = this.getHours(); return (H < 10 ? '0' : '') + H },
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i: function () { var i = this.getMinutes(); return (i < 10 ? '0' : '') + i },
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s: function () { var s = this.getSeconds(); return (s < 10 ? '0' : '') + s },
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v: function () { var v = this.getMilliseconds(); return (v < 10 ? '00' : (v < 100 ? '0' : '')) + v },
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// Timezone
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e: function () { return Intl.DateTimeFormat().resolvedOptions().timeZone },
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I: function () {
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var DST = null
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for (var i = 0; i < 12; ++i) {
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var d = new Date(this.getFullYear(), i, 1)
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var offset = d.getTimezoneOffset()
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if (DST === null) DST = offset
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else if (offset < DST) { DST = offset; break } else if (offset > DST) break
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}
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return (this.getTimezoneOffset() === DST) | 0
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},
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O: function () { var O = this.getTimezoneOffset(); return (-O < 0 ? '-' : '+') + (Math.abs(O / 60) < 10 ? '0' : '') + Math.floor(Math.abs(O / 60)) + (Math.abs(O % 60) === 0 ? '00' : ((Math.abs(O % 60) < 10 ? '0' : '')) + (Math.abs(O % 60))) },
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P: function () { var P = this.getTimezoneOffset(); return (-P < 0 ? '-' : '+') + (Math.abs(P / 60) < 10 ? '0' : '') + Math.floor(Math.abs(P / 60)) + ':' + (Math.abs(P % 60) === 0 ? '00' : ((Math.abs(P % 60) < 10 ? '0' : '')) + (Math.abs(P % 60))) },
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T: function () { var tz = this.toLocaleTimeString(navigator.language, {timeZoneName: 'short'}).split(' '); return tz[tz.length - 1] },
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Z: function () { return -this.getTimezoneOffset() * 60 },
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// Full Date/Time
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c: function () { return this.format('Y-m-d\\TH:i:sP') },
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r: function () { return this.toString() },
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U: function () { return Math.floor(this.getTime() / 1000) }
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}
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// Simulates PHP's date function
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Date.prototype.format = function (format) {
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var date = this
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return format.replace(/(\\?)(.)/g, function (_, esc, chr) {
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return (esc === '' && replaceChars[chr]) ? replaceChars[chr].call(date) : chr
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})
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}
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}).call(this)
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