Create date wrapper

src/core/core.date.js

@@ -0,0 +1,135 @@
+'use strict';
+
+var moment, luxon, DateTime;
+try {
+	moment = require('moment'); // eslint-disable-line global-require
+	moment = typeof moment === 'function' ? moment : window.moment;
+} catch (mte) {
+	try {
+		luxon = require('luxon'); // eslint-disable-line global-require
+		luxon = (luxon && luxon.DateTime) ? luxon : window.luxon;
+		DateTime = luxon && luxon.DateTime;
+	} catch (lxe) {
+		throw new Error('Chart.js - Neither Moment.js no Luxon could be found! You must include one of these date libraries to use the time scale. For more info, see https://www.chartjs.org/docs/latest/getting-started/installation.html');
+	}
+}
+
+var helpers = require('../helpers/index');
+
+var CDate = function(date) {
+	this.underlying = date;
+	this.valid = true;
+	this.initialize.apply(this, arguments);
+};
+
+helpers.extend(CDate.prototype, {
+
+	initialize: function(value) {
+		if (value === undefined) {
+			value = new Date();
+		}
+
+		if (luxon) {
+			if (typeof value === 'number') {
+				this.underlying = DateTime.fromMillis(value);
+				return;
+			}
+			if (value instanceof Date) {
+				this.underlying = DateTime.fromJSDate(value);
+				return;
+			}
+			if (value instanceof luxon) {
+				this.underlying = value;
+				return;
+			}
+			this.valid = false;
+			return
+		}
+
+		if (!(value instanceof moment)) {
+			value = moment(value);
+		}
+
+		this.underlying = value;
+	},
+
+	/**
+	 * @private
+	 */
+	_underlying: function() {
+		return luxon ? this.underlying : this.underlying.clone();
+	},
+
+	isValid: function() {
+		return this.isValid && (luxon ? this.underlying.isValid : this.underlying.isValid());
+	},
+
+	millisecond: function() {
+		return luxon ? this.underlying.millisecond : this.underlying.millisecond();
+	},
+
+	second: function() {
+		return luxon ? this.underlying.second : this.underlying.second();
+	},
+
+	minute: function() {
+		return luxon ? this.underlying.minute : this.underlying.minute();
+	},
+
+	hour: function() {
+		return luxon ? this.underlying.hour : this.underlying.hour();
+	},
+
+	isoWeekday: function(value) {
+		return this._underlying().isoWeekday(value);
+	},
+
+	startOf: function(value) {
+		return this._underlying().startOf(value);
+	},
+
+	endOf: function(value) {
+		return this._underlying().endOf(value);
+	},
+
+	valueOf: function() {
+		return this.underlying.valueOf();
+	},
+
+	toFormat: function(format) {
+		return luxon ? this.underlying.toFormat(format) : this.underlying.format(format);
+	},
+
+	add: function(value, type) {
+		if (luxon) {
+			var arg = {};
+			arg[type] = value;
+			this.underlying.plus(arg);
+		}
+		return this._underlying().add(value, type);
+	},
+
+	diff: function(other, unit) {
+		other = new CDate(other).underlying;
+		var duration = luxon ? this.underlying.diff(other)
+			: moment.duration(this.underlying.diff(other));
+		return duration.as(unit);
+	}
+
+});
+
+module.exports = {
+	CDate: CDate,
+	moment: moment,
+	defaultDisplayFormats: {
+		millisecond: 'h:mm:ss.SSS a', // 11:20:01.123 AM,
+		second: 'h:mm:ss a', // 11:20:01 AM
+		minute: 'h:mm a', // 11:20 AM
+		hour: luxon ? 'ha' : 'hA', // 5PM
+		day: luxon ? 'MMM d' : 'MMM D', // Sep 4
+		week: luxon ? 'WW' : 'll', // Week 46, or maybe "[W]WW - YYYY" ?
+		month: luxon ? 'MMM yyyy' : 'MMM YYYY', // Sept 2015
+		quarter: luxon ? '\'Q\'q - yyyy' : '[Q]Q - YYYY', // Q3 - 2015
+		year: luxon ? 'yyyy' : 'YYYY' // 2015
+	}
+};