Add models for recurring transactions
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src/app/recurringtransactions/recurringtransaction.ts
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197
src/app/recurringtransactions/recurringtransaction.ts
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export class RecurringTransaction {
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id: string = '';
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title: string;
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description: string = null;
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frequency: Frequency;
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start: Date = new Date();
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end?: Date;
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amount: number;
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expense = true;
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categoryId: string;
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budgetId: string;
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createdBy: string;
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}
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export class Frequency {
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unit: FrequencyUnit;
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count: number;
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time: Time;
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amount?: (void | Set<DayOfWeek> | DayOfMonth | DayOfYear);
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private constructor(unit: FrequencyUnit, count: number, time: Time, amount?: (void | Set<DayOfWeek> | DayOfMonth | DayOfYear) = null) {
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this.unit = unit;
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this.count = count;
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this.time = time;
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this.amount = amount;
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}
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static Daily(count: number, time: Time): Frequency {
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return new Frequency(FrequencyUnit.DAILY, count, time);
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}
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static Weekly(count: number, time: Time, daysOfWeek: Set<DayOfWeek>): Frequency {
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return new Frequency(FrequencyUnit.WEEKLY, count, time, daysOfWeek)
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}
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static Monthly(count: number, time: Time, dayOfMonth: DayOfMonth): Frequency {
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return new Frequency(FrequencyUnit.MONTHLY, count, time, dayOfMonth)
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}
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static Yearly(count: number, time: Time, dayOfYear: DayOfYear): Frequency {
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return new Frequency(FrequencyUnit.YEARLY, count, time, dayOfYear)
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}
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static parse(s: string): Frequency {
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const parts = s.split(';');
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let count: number, time: Time;
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switch (parts[0]) {
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case 'D':
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count = Number.parseInt(parts[1]);
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time = Time.parse(parts[2]);
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return this.Daily(count, time);
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case 'W':
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count = Number.parseInt(parts[1]);
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time = Time.parse(parts[3]);
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const daysOfWeek = new Set(parts[2].split(',').map(day => DayOfWeek[day]));
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return this.Weekly(count, time, daysOfWeek);
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case 'M':
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count = Number.parseInt(parts[1]);
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time = Time.parse(parts[3]);
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const dayOfMonth = DayOfMonth.parse(parts[2]);
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return this.Monthly(count, time, dayOfMonth);
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case 'Y':
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count = Number.parseInt(parts[1]);
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time = Time.parse(parts[3]);
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const dayOfYear = DayOfYear.parse(parts[2]);
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return this.Yearly(count, time, dayOfYear);
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default:
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throw new Error(`Invalid Frequency format: ${s}`);
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}
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}
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}
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export enum FrequencyUnit {
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DAILY = 'D',
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WEEKLY = 'W',
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MONTHLY = 'M',
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YEARLY = 'Y',
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}
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export class Time {
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hours: number;
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minutes: number;
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seconds: number;
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constructor(hours: number, minutes: number, seconds: number) {
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this.hours = hours;
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this.minutes = minutes;
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this.seconds = seconds;
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}
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toString(): string {
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return [
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String(this.hours).padStart(2, '0'),
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String(this.minutes).padStart(2, '0'),
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String(this.seconds).padStart(2, '0'),
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].join(':')
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}
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static parse(s: string): Time {
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if (!s.match(/[0-9]{2}:[0-9]{2}:[0-9]{2}/) {
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throw new Error('Invalid time format. Time must be formatted as HH:mm:ss');
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}
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const parts = s.split(':').map(part => Number.parseInt(part));
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return new Time(parts[0], parts[1], parts[2]);
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}
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}
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export enum Position {
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DAY = 'DAY',
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FIRST = 'FIRST',
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SECOND = 'SECOND',
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THIRD = 'THIRD',
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FOURTH = 'FOURTH',
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LAST = 'LAST',
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}
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export enum DayOfWeek {
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MONDAY = 'MONDAY',
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TUESDAY = 'TUESDAY',
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WEDNESDAY = 'WEDNESDAY',
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THURSDAY = 'THURSDAY',
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FRIDAY = 'FRIDAY',
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SATURDAY = 'SATURDAY',
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SUNDAY = 'SUNDAY',
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}
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export class DayOfMonth {
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position: Position;
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day: (number | DayOfWeek);
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private constructor(position: Position, day: (number | DayOfWeek)) {
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this.position = position;
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this.day = day;
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}
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static Each(day: number): DayOfMonth {
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if (day < 1 || day > 31) {
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throw new Error('Day must be between 1 and 31');
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}
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return new DayOfMonth(Position.DAY, day);
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}
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static PositionalDayOfWeek(position: Position, day: DayOfWeek): DayOfMonth {
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if (position === Position.DAY) {
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throw new Error('Use DayOfMonth.Each() to create a monthly recurring transaction on the same calendar day');
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}
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return new DayOfMonth(position, day)
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}
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static parse(s: string): DayOfMonth {
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const parts = s.split('-');
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const position = Position[parts[0]];
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if (position === Position.DAY) {
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return DayOfMonth.Each(Number.parseInt(parts[1]));
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} else {
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return DayOfMonth.PositionalDayOfWeek(position, DayOfWeek[parts[1]]);
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}
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}
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}
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export class DayOfYear {
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month: number;
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day: number;
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constructor(month: number, day: number) {
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this.month = month;
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this.day = day;
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}
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static parse(s: string): DayOfYear {
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if (!s.match(/[0-9]{2}-[0-9]{2}/)) {
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throw new Error(`Invalid format for DayOfYear: ${s}`)
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}
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const parts = s.split('-').map(part => Number.parseInt(part));
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if (parts[0] < 1 || parts[0] > 12) {
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throw new Error(`Invalid month for DayOfYear: ${parts[0]}`);
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}
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let maxDay: number;
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switch (parts[0]) {
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case 2:
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maxDay = 29;
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break;
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case 4:
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case 6:
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case 9:
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case 11:
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maxDay = 30;
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break;
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default:
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maxDay = 31;
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}
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if (parts[1] < 1 || parts[1] > maxDay) {
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throw new Error(`Invalid day for DayOfYear: ${parts[0]}`);
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}
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return new DayOfYear(parts[0], parts[1]);
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}
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}
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