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102 lines
3.5 KiB
102 lines
3.5 KiB
import pluralize from "pluralize";
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import {
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addDays, addMonths, addYears,
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endOfDay, endOfMonth, endOfWeek, endOfYear,
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startOfDay, startOfMonth, startOfWeek, startOfYear
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} from "./time";
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export interface DateRange {
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name: string
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calculate(date: Date): [Date, Date]
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}
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function dateRangeCallback(name: string, calculate: (date: Date) => [Date, Date]): DateRange {
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return {name, calculate};
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}
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export class RelativeDateRange {
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private duration: number
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private unit: "day" | "month" | "year"
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public name: string
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constructor(duration: number, unit: "day" | "month" | "year") {
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this.duration = duration;
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this.unit = unit;
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if (this.duration < 0) {
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this.name = `Last ${-this.duration} ${pluralize(this.unit, -this.duration)}`;
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} else {
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this.name = `Next ${this.duration} ${pluralize(this.unit, this.duration)}`;
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}
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}
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calculate(date: Date): [Date, Date] {
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switch (this.unit) {
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case "day": {
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return this.duration < 0
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? [ startOfDay(addDays(date, this.duration)), endOfDay(date) ]
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: [ startOfDay(date), endOfDay(addDays(date, this.duration)) ];
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}
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case "month": {
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return this.duration < 0
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? [ startOfDay(addMonths(date, this.duration)), endOfDay(date) ]
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: [ startOfDay(date), endOfDay(addMonths(date, this.duration)) ];
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}
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case "year": {
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return this.duration < 0
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? [ startOfDay(addYears(date, this.duration)), endOfDay(date) ]
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: [ startOfDay(date), endOfDay(addYears(date, this.duration)) ];
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}
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}
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}
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}
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export function customDateRange(from: Date, to: Date): DateRange {
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return {name: "Specific Dates", calculate: () => [from, to]}
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}
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const thisWeek = dateRangeCallback("This week", date => [startOfWeek(date), endOfWeek(date)]);
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const nextWeek = dateRangeCallback("Next week", date => [startOfWeek(addDays(date, 7)), endOfWeek(addDays(date, 7))]);
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const lastWeek = dateRangeCallback("Last week", date => [startOfWeek(addDays(date, -7)), endOfWeek(addDays(date, -7))]);
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const thisMonth = dateRangeCallback("This month", date => [startOfMonth(date), endOfMonth(date)]);
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const nextMonth = dateRangeCallback("Next month", date => [startOfMonth(addMonths(date, 1)), endOfMonth(addMonths(date, 1))]);
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const lastMonth = dateRangeCallback("Last month", date => [startOfMonth(addMonths(date, -1)), endOfMonth(addMonths(date, -1))]);
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const thisYear = dateRangeCallback("This year", date => [startOfYear(date), endOfYear(date)]);
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const nextYear = dateRangeCallback("Next year", date => [startOfYear(addYears(date, 1)), endOfYear(addYears(date, 1))]);
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const lastYear = dateRangeCallback("Last year", date => [startOfYear(addYears(date, -1)), endOfYear(addYears(date, -1))]);
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export const allOffsets: DateRange[] = [
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thisWeek,
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nextWeek,
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new RelativeDateRange(7, "day"),
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lastWeek,
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new RelativeDateRange(-7, "day"),
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thisMonth,
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nextMonth,
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new RelativeDateRange(30, "day"),
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new RelativeDateRange(90, "day"),
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lastMonth,
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new RelativeDateRange(-30, "day"),
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new RelativeDateRange(-90, "day"),
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thisYear,
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nextYear,
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new RelativeDateRange(1, "year"),
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lastYear,
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new RelativeDateRange(-1, "year"),
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];
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export function rangeFromDates(from: Date, to: Date, options: DateRange[]): DateRange {
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for (const option of options) {
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const [from2, to2] = option.calculate(new Date());
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if (from2.getTime() == from.getTime() && to2.getTime() === to.getTime()) {
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return option;
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}
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}
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return customDateRange(from, to);
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}
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export const pastOffsets: DateRange[] = allOffsets.filter(r => !r.name.startsWith("Next"));
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