var moment = require('../module/moment'); var DateUtil = require('./DateUtil'); var util = require('../util'); /** * @constructor TimeStep * The class TimeStep is an iterator for dates. You provide a start date and an * end date. The class itself determines the best scale (step size) based on the * provided start Date, end Date, and minimumStep. * * If minimumStep is provided, the step size is chosen as close as possible * to the minimumStep but larger than minimumStep. If minimumStep is not * provided, the scale is set to 1 DAY. * The minimumStep should correspond with the onscreen size of about 6 characters * * Alternatively, you can set a scale by hand. * After creation, you can initialize the class by executing first(). Then you * can iterate from the start date to the end date via next(). You can check if * the end date is reached with the function hasNext(). After each step, you can * retrieve the current date via getCurrent(). * The TimeStep has scales ranging from milliseconds, seconds, minutes, hours, * days, to years. * * Version: 1.2 * * @param {Date} [start] The start date, for example new Date(2010, 9, 21) * or new Date(2010, 9, 21, 23, 45, 00) * @param {Date} [end] The end date * @param {Number} [minimumStep] Optional. Minimum step size in milliseconds */ function TimeStep(start, end, minimumStep, hiddenDates) { this.moment = moment; // variables this.current = this.moment(); this._start = this.moment(); this._end = this.moment(); this.autoScale = true; this.scale = 'day'; this.step = 1; // initialize the range this.setRange(start, end, minimumStep); // hidden Dates options this.switchedDay = false; this.switchedMonth = false; this.switchedYear = false; if (Array.isArray(hiddenDates)) { this.hiddenDates = hiddenDates; } else if (hiddenDates != undefined) { this.hiddenDates = [hiddenDates]; } else { this.hiddenDates = []; } this.format = TimeStep.FORMAT; // default formatting } // Time formatting TimeStep.FORMAT = { minorLabels: { millisecond:'SSS', second: 's', minute: 'HH:mm', hour: 'HH:mm', weekday: 'ddd D', day: 'D', week: 'w', month: 'MMM', year: 'YYYY' }, majorLabels: { millisecond:'HH:mm:ss', second: 'D MMMM HH:mm', minute: 'ddd D MMMM', hour: 'ddd D MMMM', weekday: 'MMMM YYYY', day: 'MMMM YYYY', week: 'MMMM YYYY', month: 'YYYY', year: '' } }; /** * Set custom constructor function for moment. Can be used to set dates * to UTC or to set a utcOffset. * @param {function} moment */ TimeStep.prototype.setMoment = function (moment) { this.moment = moment; // update the date properties, can have a new utcOffset this.current = this.moment(this.current.valueOf()); this._start = this.moment(this._start.valueOf()); this._end = this.moment(this._end.valueOf()); }; /** * Set custom formatting for the minor an major labels of the TimeStep. * Both `minorLabels` and `majorLabels` are an Object with properties: * 'millisecond', 'second', 'minute', 'hour', 'weekday', 'day', 'week', 'month', 'year'. * @param {{minorLabels: Object, majorLabels: Object}} format */ TimeStep.prototype.setFormat = function (format) { var defaultFormat = util.deepExtend({}, TimeStep.FORMAT); this.format = util.deepExtend(defaultFormat, format); }; /** * Set a new range * If minimumStep is provided, the step size is chosen as close as possible * to the minimumStep but larger than minimumStep. If minimumStep is not * provided, the scale is set to 1 DAY. * The minimumStep should correspond with the onscreen size of about 6 characters * @param {Date} [start] The start date and time. * @param {Date} [end] The end date and time. * @param {int} [minimumStep] Optional. Minimum step size in milliseconds */ TimeStep.prototype.setRange = function(start, end, minimumStep) { if (!(start instanceof Date) || !(end instanceof Date)) { throw "No legal start or end date in method setRange"; } this._start = (start != undefined) ? this.moment(start.valueOf()) : new Date(); this._end = (end != undefined) ? this.moment(end.valueOf()) : new Date(); if (this.autoScale) { this.setMinimumStep(minimumStep); } }; /** * Set the range iterator to the start date. */ TimeStep.prototype.start = function() { this.current = this._start.clone(); this.roundToMinor(); }; /** * Round the current date to the first minor date value * This must be executed once when the current date is set to start Date */ TimeStep.prototype.roundToMinor = function() { // round to floor // to prevent year & month scales rounding down to the first day of week we perform this separately if (this.scale == 'week') { this.current.weekday(0); } // IMPORTANT: we have no breaks in this switch! (this is no bug) // noinspection FallThroughInSwitchStatementJS switch (this.scale) { case 'year': this.current.year(this.step * Math.floor(this.current.year() / this.step)); this.current.month(0); case 'month': this.current.date(1); case 'week': // intentional fall through case 'day': // intentional fall through case 'weekday': this.current.hours(0); case 'hour': this.current.minutes(0); case 'minute': this.current.seconds(0); case 'second': this.current.milliseconds(0); //case 'millisecond': // nothing to do for milliseconds } if (this.step != 1) { // round down to the first minor value that is a multiple of the current step size switch (this.scale) { case 'millisecond': this.current.subtract(this.current.milliseconds() % this.step, 'milliseconds'); break; case 'second': this.current.subtract(this.current.seconds() % this.step, 'seconds'); break; case 'minute': this.current.subtract(this.current.minutes() % this.step, 'minutes'); break; case 'hour': this.current.subtract(this.current.hours() % this.step, 'hours'); break; case 'weekday': // intentional fall through case 'day': this.current.subtract((this.current.date() - 1) % this.step, 'day'); break; case 'week': this.current.subtract(this.current.week() % this.step, 'week'); break; case 'month': this.current.subtract(this.current.month() % this.step, 'month'); break; case 'year': this.current.subtract(this.current.year() % this.step, 'year'); break; default: break; } } }; /** * Check if the there is a next step * @return {boolean} true if the current date has not passed the end date */ TimeStep.prototype.hasNext = function () { return (this.current.valueOf() <= this._end.valueOf()); }; /** * Do the next step */ TimeStep.prototype.next = function() { var prev = this.current.valueOf(); // Two cases, needed to prevent issues with switching daylight savings // (end of March and end of October) switch (this.scale) { case 'millisecond': this.current.add(this.step, 'millisecond'); break; case 'second': this.current.add(this.step, 'second'); break; case 'minute': this.current.add(this.step, 'minute'); break; case 'hour': this.current.add(this.step, 'hour'); if (this.current.month() < 6) { this.current.subtract(this.current.hours() % this.step, 'hour'); } else { if (this.current.hours() % this.step !== 0) { this.current.add(this.step - this.current.hours() % this.step, 'hour'); } } break; case 'weekday': // intentional fall through case 'day': this.current.add(this.step, 'day'); break; case 'week': if (this.current.weekday() !== 0){ // we had a month break not correlating with a week's start before this.current.weekday(0); // switch back to week cycles this.current.add(this.step, 'week'); } else { // first day of the week var nextWeek = this.current.clone(); nextWeek.add(1, 'week'); if(nextWeek.isSame(this.current, 'month')){ // is the first day of the next week in the same month? this.current.add(this.step, 'week'); // the default case } else { // inject a step at each first day of the month this.current.add(this.step, 'week'); this.current.date(1); } } break; case 'month': this.current.add(this.step, 'month'); break; case 'year': this.current.add(this.step, 'year'); break; default: break; } if (this.step != 1) { // round down to the correct major value switch (this.scale) { case 'millisecond': if(this.current.milliseconds() > 0 && this.current.milliseconds() < this.step) this.current.milliseconds(0); break; case 'second': if(this.current.seconds() > 0 && this.current.seconds() < this.step) this.current.seconds(0); break; case 'minute': if(this.current.minutes() > 0 && this.current.minutes() < this.step) this.current.minutes(0); break; case 'hour': if(this.current.hours() > 0 && this.current.hours() < this.step) this.current.hours(0); break; case 'weekday': // intentional fall through case 'day': if(this.current.date() < this.step+1) this.current.date(1); break; case 'week': if(this.current.week() < this.step) this.current.week(1); break; // week numbering starts at 1, not 0 case 'month': if(this.current.month() < this.step) this.current.month(0); break; case 'year': break; // nothing to do for year default: break; } } // safety mechanism: if current time is still unchanged, move to the end if (this.current.valueOf() == prev) { this.current = this._end.clone(); } // Reset switches for year, month and day. Will get set to true where appropriate in DateUtil.stepOverHiddenDates this.switchedDay = false; this.switchedMonth = false; this.switchedYear = false; DateUtil.stepOverHiddenDates(this.moment, this, prev); }; /** * Get the current datetime * @return {Moment} current The current date */ TimeStep.prototype.getCurrent = function() { return this.current; }; /** * Set a custom scale. Autoscaling will be disabled. * For example setScale('minute', 5) will result * in minor steps of 5 minutes, and major steps of an hour. * * @param {{scale: string, step: number}} params * An object containing two properties: * - A string 'scale'. Choose from 'millisecond', 'second', * 'minute', 'hour', 'weekday', 'day', 'week', 'month', 'year'. * - A number 'step'. A step size, by default 1. * Choose for example 1, 2, 5, or 10. */ TimeStep.prototype.setScale = function(params) { if (params && typeof params.scale == 'string') { this.scale = params.scale; this.step = params.step > 0 ? params.step : 1; this.autoScale = false; } }; /** * Enable or disable autoscaling * @param {boolean} enable If true, autoascaling is set true */ TimeStep.prototype.setAutoScale = function (enable) { this.autoScale = enable; }; /** * Automatically determine the scale that bests fits the provided minimum step * @param {Number} [minimumStep] The minimum step size in milliseconds */ TimeStep.prototype.setMinimumStep = function(minimumStep) { if (minimumStep == undefined) { return; } //var b = asc + ds; var stepYear = (1000 * 60 * 60 * 24 * 30 * 12); var stepMonth = (1000 * 60 * 60 * 24 * 30); var stepDay = (1000 * 60 * 60 * 24); var stepHour = (1000 * 60 * 60); var stepMinute = (1000 * 60); var stepSecond = (1000); var stepMillisecond= (1); // find the smallest step that is larger than the provided minimumStep if (stepYear*1000 > minimumStep) {this.scale = 'year'; this.step = 1000;} if (stepYear*500 > minimumStep) {this.scale = 'year'; this.step = 500;} if (stepYear*100 > minimumStep) {this.scale = 'year'; this.step = 100;} if (stepYear*50 > minimumStep) {this.scale = 'year'; this.step = 50;} if (stepYear*10 > minimumStep) {this.scale = 'year'; this.step = 10;} if (stepYear*5 > minimumStep) {this.scale = 'year'; this.step = 5;} if (stepYear > minimumStep) {this.scale = 'year'; this.step = 1;} if (stepMonth*3 > minimumStep) {this.scale = 'month'; this.step = 3;} if (stepMonth > minimumStep) {this.scale = 'month'; this.step = 1;} if (stepDay*5 > minimumStep) {this.scale = 'day'; this.step = 5;} if (stepDay*2 > minimumStep) {this.scale = 'day'; this.step = 2;} if (stepDay > minimumStep) {this.scale = 'day'; this.step = 1;} if (stepDay/2 > minimumStep) {this.scale = 'weekday'; this.step = 1;} if (stepHour*4 > minimumStep) {this.scale = 'hour'; this.step = 4;} if (stepHour > minimumStep) {this.scale = 'hour'; this.step = 1;} if (stepMinute*15 > minimumStep) {this.scale = 'minute'; this.step = 15;} if (stepMinute*10 > minimumStep) {this.scale = 'minute'; this.step = 10;} if (stepMinute*5 > minimumStep) {this.scale = 'minute'; this.step = 5;} if (stepMinute > minimumStep) {this.scale = 'minute'; this.step = 1;} if (stepSecond*15 > minimumStep) {this.scale = 'second'; this.step = 15;} if (stepSecond*10 > minimumStep) {this.scale = 'second'; this.step = 10;} if (stepSecond*5 > minimumStep) {this.scale = 'second'; this.step = 5;} if (stepSecond > minimumStep) {this.scale = 'second'; this.step = 1;} if (stepMillisecond*200 > minimumStep) {this.scale = 'millisecond'; this.step = 200;} if (stepMillisecond*100 > minimumStep) {this.scale = 'millisecond'; this.step = 100;} if (stepMillisecond*50 > minimumStep) {this.scale = 'millisecond'; this.step = 50;} if (stepMillisecond*10 > minimumStep) {this.scale = 'millisecond'; this.step = 10;} if (stepMillisecond*5 > minimumStep) {this.scale = 'millisecond'; this.step = 5;} if (stepMillisecond > minimumStep) {this.scale = 'millisecond'; this.step = 1;} }; /** * Snap a date to a rounded value. * The snap intervals are dependent on the current scale and step. * Static function * @param {Date} date the date to be snapped. * @param {string} scale Current scale, can be 'millisecond', 'second', * 'minute', 'hour', 'weekday, 'day', 'week', 'month', 'year'. * @param {number} step Current step (1, 2, 4, 5, ... * @return {Date} snappedDate */ TimeStep.snap = function(date, scale, step) { var clone = moment(date); if (scale == 'year') { var year = clone.year() + Math.round(clone.month() / 12); clone.year(Math.round(year / step) * step); clone.month(0); clone.date(0); clone.hours(0); clone.minutes(0); clone.seconds(0); clone.milliseconds(0); } else if (scale == 'month') { if (clone.date() > 15) { clone.date(1); clone.add(1, 'month'); // important: first set Date to 1, after that change the month. } else { clone.date(1); } clone.hours(0); clone.minutes(0); clone.seconds(0); clone.milliseconds(0); } else if (scale == 'week') { if (clone.weekday() > 2) { // doing it the momentjs locale aware way clone.weekday(0); clone.add(1, 'week'); } else { clone.weekday(0); } clone.hours(0); clone.minutes(0); clone.seconds(0); clone.milliseconds(0); } else if (scale == 'day') { //noinspection FallthroughInSwitchStatementJS switch (step) { case 5: case 2: clone.hours(Math.round(clone.hours() / 24) * 24); break; default: clone.hours(Math.round(clone.hours() / 12) * 12); break; } clone.minutes(0); clone.seconds(0); clone.milliseconds(0); } else if (scale == 'weekday') { //noinspection FallthroughInSwitchStatementJS switch (step) { case 5: case 2: clone.hours(Math.round(clone.hours() / 12) * 12); break; default: clone.hours(Math.round(clone.hours() / 6) * 6); break; } clone.minutes(0); clone.seconds(0); clone.milliseconds(0); } else if (scale == 'hour') { switch (step) { case 4: clone.minutes(Math.round(clone.minutes() / 60) * 60); break; default: clone.minutes(Math.round(clone.minutes() / 30) * 30); break; } clone.seconds(0); clone.milliseconds(0); } else if (scale == 'minute') { //noinspection FallthroughInSwitchStatementJS switch (step) { case 15: case 10: clone.minutes(Math.round(clone.minutes() / 5) * 5); clone.seconds(0); break; case 5: clone.seconds(Math.round(clone.seconds() / 60) * 60); break; default: clone.seconds(Math.round(clone.seconds() / 30) * 30); break; } clone.milliseconds(0); } else if (scale == 'second') { //noinspection FallthroughInSwitchStatementJS switch (step) { case 15: case 10: clone.seconds(Math.round(clone.seconds() / 5) * 5); clone.milliseconds(0); break; case 5: clone.milliseconds(Math.round(clone.milliseconds() / 1000) * 1000); break; default: clone.milliseconds(Math.round(clone.milliseconds() / 500) * 500); break; } } else if (scale == 'millisecond') { var _step = step > 5 ? step / 2 : 1; clone.milliseconds(Math.round(clone.milliseconds() / _step) * _step); } return clone; }; /** * Check if the current value is a major value (for example when the step * is DAY, a major value is each first day of the MONTH) * @return {boolean} true if current date is major, else false. */ TimeStep.prototype.isMajor = function() { if (this.switchedYear == true) { switch (this.scale) { case 'year': case 'month': case 'week': case 'weekday': case 'day': case 'hour': case 'minute': case 'second': case 'millisecond': return true; default: return false; } } else if (this.switchedMonth == true) { switch (this.scale) { case 'week': case 'weekday': case 'day': case 'hour': case 'minute': case 'second': case 'millisecond': return true; default: return false; } } else if (this.switchedDay == true) { switch (this.scale) { case 'millisecond': case 'second': case 'minute': case 'hour': return true; default: return false; } } var date = this.moment(this.current); switch (this.scale) { case 'millisecond': return (date.milliseconds() == 0); case 'second': return (date.seconds() == 0); case 'minute': return (date.hours() == 0) && (date.minutes() == 0); case 'hour': return (date.hours() == 0); case 'weekday': // intentional fall through case 'day': return (date.date() == 1); case 'week': return (date.date() == 1); case 'month': return (date.month() == 0); case 'year': return false; default: return false; } }; /** * Returns formatted text for the minor axislabel, depending on the current * date and the scale. For example when scale is MINUTE, the current time is * formatted as "hh:mm". * @param {Date} [date] custom date. if not provided, current date is taken */ TimeStep.prototype.getLabelMinor = function(date) { if (date == undefined) { date = this.current; } if (date instanceof Date) { date = this.moment(date) } if (typeof(this.format.minorLabels) === "function") { return this.format.minorLabels(date, this.scale, this.step); } var format = this.format.minorLabels[this.scale]; // noinspection FallThroughInSwitchStatementJS switch (this.scale) { case 'week': if(this.isMajor() && date.weekday() !== 0){ return ""; } default: return (format && format.length > 0) ? this.moment(date).format(format) : ''; } }; /** * Returns formatted text for the major axis label, depending on the current * date and the scale. For example when scale is MINUTE, the major scale is * hours, and the hour will be formatted as "hh". * @param {Date} [date] custom date. if not provided, current date is taken */ TimeStep.prototype.getLabelMajor = function(date) { if (date == undefined) { date = this.current; } if (date instanceof Date) { date = this.moment(date) } if (typeof(this.format.majorLabels) === "function") { return this.format.majorLabels(date, this.scale, this.step); } var format = this.format.majorLabels[this.scale]; return (format && format.length > 0) ? this.moment(date).format(format) : ''; }; TimeStep.prototype.getClassName = function() { var _moment = this.moment; var m = this.moment(this.current); var current = m.locale ? m.locale('en') : m.lang('en'); // old versions of moment have .lang() function var step = this.step; var classNames = []; function even(value) { return (value / step % 2 == 0) ? ' vis-even' : ' vis-odd'; } function today(date) { if (date.isSame(new Date(), 'day')) { return ' vis-today'; } if (date.isSame(_moment().add(1, 'day'), 'day')) { return ' vis-tomorrow'; } if (date.isSame(_moment().add(-1, 'day'), 'day')) { return ' vis-yesterday'; } return ''; } function currentWeek(date) { return date.isSame(new Date(), 'week') ? ' vis-current-week' : ''; } function currentMonth(date) { return date.isSame(new Date(), 'month') ? ' vis-current-month' : ''; } function currentYear(date) { return date.isSame(new Date(), 'year') ? ' vis-current-year' : ''; } switch (this.scale) { case 'millisecond': classNames.push(today(current)); classNames.push(even(current.milliseconds())); break; case 'second': classNames.push(today(current)); classNames.push(even(current.seconds())); break; case 'minute': classNames.push(today(current)); classNames.push(even(current.minutes())); break; case 'hour': classNames.push('vis-h' + current.hours() + this.step == 4 ? '-h' + (current.hours() + 4) : ''); classNames.push(today(current)); classNames.push(even(current.hours())); break; case 'weekday': classNames.push('vis-' + current.format('dddd').toLowerCase()); classNames.push(today(current)); classNames.push(currentWeek(current)); classNames.push(even(current.date())); break; case 'day': classNames.push('vis-day' + current.date()); classNames.push('vis-' + current.format('MMMM').toLowerCase()); classNames.push(today(current)); classNames.push(currentMonth(current)); classNames.push(this.step <= 2 ? today(current) : ''); classNames.push(this.step <= 2 ? 'vis-' + current.format('dddd').toLowerCase() : ''); classNames.push(even(current.date() - 1)); break; case 'week': classNames.push('vis-week' + current.format('w')); classNames.push(currentWeek(current)); classNames.push(even(current.week())); break; case 'month': classNames.push('vis-' + current.format('MMMM').toLowerCase()); classNames.push(currentMonth(current)); classNames.push(even(current.month())); break; case 'year': classNames.push('vis-year' + current.year()); classNames.push(currentYear(current)); classNames.push(even(current.year())); break; } return classNames.filter(String).join(" "); }; module.exports = TimeStep;