angular2-moment/calendar.pipe.js

"use strict";
/* angular2-moment (c) 2015, 2016 Uri Shaked / MIT Licence */
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Object.defineProperty(exports, "__esModule", { value: true });
var core_1 = require("@angular/core");
var moment = require("moment");
// under systemjs, moment is actually exported as the default export, so we account for that
var momentConstructor = moment.default || moment;
var CalendarPipe = /** @class */ (function () {
    function CalendarPipe(cdRef, ngZone) {
        var _this = this;
        this.cdRef = cdRef;
        this.ngZone = ngZone;
        // using a single static timer for all instances of this pipe for performance reasons
        CalendarPipe_1.initTimer(ngZone);
        CalendarPipe_1.refs++;
        // values such as Today will need to be replaced with Yesterday after midnight,
        // so make sure we subscribe to an EventEmitter that we set up to emit at midnight
        this.midnightSub = CalendarPipe_1.midnight.subscribe(function () {
            _this.ngZone.run(function () { return _this.cdRef.markForCheck(); });
        });
    }
    CalendarPipe_1 = CalendarPipe;
    CalendarPipe.prototype.transform = function (value) {
        var args = [];
        for (var _i = 1; _i < arguments.length; _i++) {
            args[_i - 1] = arguments[_i];
        }
        var formats = null;
        var referenceTime = null;
        for (var i = 0, len = args.length; i < len; i++) {
            if (args[i] !== null) {
                if (typeof args[i] === 'object' && !moment.isMoment(args[i])) {
                    formats = args[i];
                }
                else {
                    referenceTime = momentConstructor(args[i]);
                }
            }
        }
        return momentConstructor(value).calendar(referenceTime, formats);
    };
    CalendarPipe.prototype.ngOnDestroy = function () {
        if (CalendarPipe_1.refs > 0) {
            CalendarPipe_1.refs--;
        }
        if (CalendarPipe_1.refs === 0) {
            CalendarPipe_1.removeTimer();
        }
        this.midnightSub.unsubscribe();
    };
    CalendarPipe.initTimer = function (ngZone) {
        // initialize the timer
        if (!CalendarPipe_1.midnight) {
            CalendarPipe_1.midnight = new core_1.EventEmitter();
            if (typeof window !== 'undefined') {
                var timeToUpdate_1 = CalendarPipe_1._getMillisecondsUntilUpdate();
                CalendarPipe_1.timer = ngZone.runOutsideAngular(function () {
                    return window.setTimeout(function () {
                        // emit the current date
                        CalendarPipe_1.midnight.emit(new Date());
                        // refresh the timer
                        CalendarPipe_1.removeTimer();
                        CalendarPipe_1.initTimer(ngZone);
                    }, timeToUpdate_1);
                });
            }
        }
    };
    CalendarPipe.removeTimer = function () {
        if (CalendarPipe_1.timer) {
            window.clearTimeout(CalendarPipe_1.timer);
            CalendarPipe_1.timer = null;
            CalendarPipe_1.midnight = null;
        }
    };
    CalendarPipe._getMillisecondsUntilUpdate = function () {
        var now = momentConstructor();
        var tomorrow = momentConstructor().startOf('day').add(1, 'days');
        var timeToMidnight = tomorrow.valueOf() - now.valueOf();
        return timeToMidnight + 1000; // 1 second after midnight
    };
    /**
     * @private Internal reference counter, so we can clean up when no instances are in use
     * @type {number}
     */
    CalendarPipe.refs = 0;
    CalendarPipe = CalendarPipe_1 = __decorate([
        core_1.Pipe({ name: 'amCalendar', pure: false }),
        __metadata("design:paramtypes", [core_1.ChangeDetectorRef, core_1.NgZone])
    ], CalendarPipe);
    return CalendarPipe;
    var CalendarPipe_1;
}());
exports.CalendarPipe = CalendarPipe;
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