119 lines
3.4 KiB
JavaScript
119 lines
3.4 KiB
JavaScript
/**
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* All Hail Discordia! - this script prints Discordian date using system date.
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*
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* lang: JavaScript
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* author: jklu
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* contributors: JamesMcGuigan
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*
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* changelog:
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* - Modified to return same output syntax as unix ddate + module.exports - James McGuigan, 2/Chaos/3183
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*
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* source: https://rosettacode.org/wiki/Discordian_date#JavaScript
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*/
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var seasons = [
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"Chaos", "Discord", "Confusion",
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"Bureaucracy", "The Aftermath"
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];
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var weekday = [
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"Sweetmorn", "Boomtime", "Pungenday",
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"Prickle-Prickle", "Setting Orange"
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];
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var apostle = [
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"Mungday", "Mojoday", "Syaday",
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"Zaraday", "Maladay"
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];
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var holiday = [
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"Chaoflux", "Discoflux", "Confuflux",
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"Bureflux", "Afflux"
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];
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Date.prototype.isLeapYear = function() {
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var year = this.getFullYear();
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if( (year & 3) !== 0 ) { return false; }
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return ((year % 100) !== 0 || (year % 400) === 0);
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};
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// Get Day of Year
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Date.prototype.getDOY = function() {
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var dayCount = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334];
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var mn = this.getMonth();
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var dn = this.getDate();
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var dayOfYear = dayCount[mn] + dn;
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if( mn > 1 && this.isLeapYear() ) { dayOfYear++; }
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return dayOfYear;
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};
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Date.prototype.isToday = function() {
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var today = new Date();
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return this.getDate() === today.getDate()
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&& this.getMonth() === today.getMonth()
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&& this.getFullYear() === today.getFullYear()
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;
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};
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function discordianDate(date) {
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if( !date ) { date = new Date(); }
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var y = date.getFullYear();
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var yold = y + 1166;
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var dayOfYear = date.getDOY();
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var celebrateHoliday = null;
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if( date.isLeapYear() ) {
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if( dayOfYear == 60 ) {
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celebrateHoliday = "St. Tib's Day";
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}
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else if( dayOfYear > 60 ) {
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dayOfYear--;
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}
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}
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dayOfYear--;
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var divDay = Math.floor(dayOfYear / 73);
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var seasonDay = (dayOfYear % 73) + 1;
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if( seasonDay == 5 ) {
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celebrateHoliday = apostle[divDay];
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}
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if( seasonDay == 50 ) {
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celebrateHoliday = holiday[divDay];
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}
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var season = seasons[divDay];
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var dayOfWeek = weekday[dayOfYear % 5];
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var nth = (seasonDay % 10 == 1) ? 'st'
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: (seasonDay % 10 == 2) ? 'nd'
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: (seasonDay % 10 == 3) ? 'rd'
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: 'th';
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return "" //(date.isToday() ? "Today is " : '')
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+ dayOfWeek
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+ ", the " + seasonDay + nth
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+ " day of " + season
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+ " in the YOLD " + yold
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+ (celebrateHoliday ? ". Celebrate " + celebrateHoliday + "!" : '')
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;
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}
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function test(y, m, d, result) {
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console.assert((discordianDate(new Date(y, m, d)) == result), [y, m, d, discordianDate(new Date(y, m, d)), result]);
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}
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// Only run test code if node calls this file directly
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if( require.main === module ) {
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console.log(discordianDate(new Date(Date.now())));
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test(2010, 6, 22, "Pungenday, the 57th day of Confusion in the YOLD 3176");
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test(2012, 1, 28, "Prickle-Prickle, the 59th day of Chaos in the YOLD 3178");
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test(2012, 1, 29, "Setting Orange, the 60th day of Chaos in the YOLD 3178. Celebrate St. Tib's Day!");
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test(2012, 2, 1, "Setting Orange, the 60th day of Chaos in the YOLD 3178");
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test(2010, 0, 5, "Setting Orange, the 5th day of Chaos in the YOLD 3176. Celebrate Mungday!");
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test(2011, 4, 3, "Pungenday, the 50th day of Discord in the YOLD 3177. Celebrate Discoflux!");
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test(2015, 9, 19, "Boomtime, the 73rd day of Bureaucracy in the YOLD 3181");
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}
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module.exports = discordianDate;
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