WIP
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Chris Chen
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export class DateUtils {
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// public static getIntervalDays(from: Date, to: Date, daysOfYear: DaysOfYear = DaysOfYear.ThirtyDaysPerMonth, countEndDate: boolean = false): number {
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// let isNegative = false;
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// if (from > to) {
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// isNegative = true;
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// let temp = new Date(to);
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// to = from;
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// from = temp;
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// }
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// var days = 0;
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// if (from && to) {
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// //Get date without time
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// from = new Date(from.getFullYear(), from.getMonth(), from.getDate());
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// to = new Date(to.getFullYear(), to.getMonth(), to.getDate());
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// var differenceTime = to.getTime() - from.getTime();
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// if (differenceTime > 0) {
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// if (daysOfYear == DaysOfYear.ThirtyDaysPerMonth) {
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// var fromYear = from.getFullYear();
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// var toYear = to.getFullYear();
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// var fromMonth = from.getMonth() + 1;
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// var toMonth = to.getMonth() + 1;
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// var fromDays = from.getDate() > 30 ? 30 : from.getDate();
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// var toDays = to.getDate();
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// days += 30 - fromDays;
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// days += toDays;
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// //calculate full 12 months years
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// if (toYear > (fromYear + 1)) {
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// days += (toYear - fromYear - 1) * 12 * 30;
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// }
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// //if it's two different years, calculate the interval months
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// if (toYear > fromYear) {
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// days += (12 - fromMonth) * 30;
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// days += (toMonth - 1) * 30;
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// }
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// else {
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// //same year
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// days += (toMonth - fromMonth - 1) * 30
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// }
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// }
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// else {
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// // To calculate the no. of days between two dates
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// days = Math.round(differenceTime / (1000 * 3600 * 24));
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// }
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// }
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// }
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// return (days + (countEndDate ? 1 : 0)) * (isNegative ? -1 : 1);
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// }
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public static addDays(date: Date, days: number): Date {
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if (date) {
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var result = new Date(date);
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result.setDate(result.getDate() + days);
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return result;
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}
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return date;
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}
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public static format(date: Date, format: string = 'MM/dd/yyyy hh:mm:ss', nullFormat: string = ''): string {
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if (date) {
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var z = {
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M: date.getMonth() + 1,
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d: date.getDate(),
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H: date.getHours(),
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h: (date.getHours() == 0 ? date.getHours() + 12 : date.getHours() > 12 ? date.getHours() - 12 : date.getHours()),
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m: date.getMinutes(),
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s: date.getSeconds(),
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a: (date.getHours() > 11 ? 'PM' : 'AM')
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};
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format = format.replace(/(M+|d+|H+|h+|m+|s+|a+)/g, function (v) {
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return ((v.length > 1 ? "0" : "") + z[v.slice(-1) as keyof typeof z]).slice(-2);
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});
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return format.replace(/(y+)/g, function (v) {
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return date.getFullYear().toString().slice(-v.length)
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});
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}
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return nullFormat;
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}
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public static isValidDate(d: Date): boolean {
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return d instanceof Date && d.getTime() == d.getTime();
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}
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public static parse(value: string | Date | null | undefined, changeToLocalTime = false): Date | null {
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if (value) {
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if (typeof value === 'string' && value.includes('-')) {
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value = this.parseLocalDate(value);
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return value;
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}
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value = new Date(value);
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if (changeToLocalTime) {
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//todo: change to local time from UTC
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}
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} else {
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return null;
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}
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return value
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}
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public static parseLocalDate(localDate: string): Date {
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const [year, month, day] = localDate.split('-').map(Number);
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return new Date(year, month, day);
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}
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public static toLocalDate(date: Date): string {
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return this.format(date, 'yyyy-MM-dd');
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}
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public static getToday(endOfDay: boolean = false): Date {
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let value = new Date();
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if (!endOfDay) {
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value.setHours(0, 0, 0, 0);
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}
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else {
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value.setHours(23, 59, 59, 999);
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}
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return value
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}
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public static getBeginOfDate(value: Date): Date {
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if (value) {
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value = new Date(value);
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value.setHours(0, 0, 0, 0);
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}
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return value
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}
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public static getEndOfDate(value: Date): Date {
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if (value) {
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value = new Date(value);
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value.setHours(23, 59, 59, 999);
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}
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return value
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}
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public static getEndOfMonth(value: Date): Date {
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if (value) {
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return new Date(value.getFullYear(), value.getMonth() + 1, 0)
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}
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return value;
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}
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public static getFirstDayOfCurrentMonth = (): Date => {
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const now = new Date();
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return new Date(now.getFullYear(), now.getMonth(), 1);
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};
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public static getLastDayOfCurrentMonth = (): Date => {
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const now = new Date();
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return new Date(now.getFullYear(), now.getMonth() + 1, 0);
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};
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public static isSameDate(date: Date, comparison: Date): boolean {
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if (!date || !comparison) return (!date && !comparison);
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date = this.parse(date, false) as Date;
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comparison = this.parse(comparison, false) as Date;
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return date.getFullYear() == comparison.getFullYear() && date.getMonth() == comparison.getMonth() && date.getDate() == comparison.getDate();
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}
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public static getTimeStamp() {
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var now = new Date();
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return ((now.getMonth() + 1) + '/' + (now.getDate()) + '/' + now.getFullYear() + " " + now.getHours() + ':'
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+ ((now.getMinutes() < 10) ? ("0" + now.getMinutes()) : (now.getMinutes())) + ':' + ((now.getSeconds() < 10) ? ("0" + now
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.getSeconds()) : (now.getSeconds())));
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}
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public static getDatesBetween(startDate: Date, endDate: Date): Date[] {
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startDate = this.getBeginOfDate(startDate);
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endDate = this.getBeginOfDate(endDate);
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let result = [startDate];
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if (startDate < endDate) {
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let tempDate = new Date(startDate);
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while (tempDate < endDate) {
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tempDate = this.addDays(tempDate, 1);
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result.push(tempDate);
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}
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}
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return result;
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}
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/**
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* Returns the stored time value in milliseconds since midnight, January 1, 1970 UTC., return 0 if date is null
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*/
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public static getTime(date?: Date): number {
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return date != null ? date.getTime() : 0;
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}
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}
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