65 lines
1.7 KiB
TypeScript
65 lines
1.7 KiB
TypeScript
import { DomainError } from '@/shared/exceptions'
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export class Month {
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constructor(public readonly value: string) {
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if (!/^\d{4}-\d{2}$/.test(value)) {
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throw new DomainError('月份格式错误，应为YYYY-MM')
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}
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}
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static current(): Month {
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const now = new Date()
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const year = now.getFullYear()
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const month = String(now.getMonth() + 1).padStart(2, '0')
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return new Month(`${year}-${month}`)
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}
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static create(value: string): Month {
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return new Month(value)
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}
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static fromDate(date: Date): Month {
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const year = date.getFullYear()
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const month = String(date.getMonth() + 1).padStart(2, '0')
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return new Month(`${year}-${month}`)
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}
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next(): Month {
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const [year, month] = this.value.split('-').map(Number)
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const nextMonth = month === 12 ? 1 : month + 1
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const nextYear = month === 12 ? year + 1 : year
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return new Month(`${nextYear}-${String(nextMonth).padStart(2, '0')}`)
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}
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previous(): Month {
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const [year, month] = this.value.split('-').map(Number)
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const prevMonth = month === 1 ? 12 : month - 1
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const prevYear = month === 1 ? year - 1 : year
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return new Month(`${prevYear}-${String(prevMonth).padStart(2, '0')}`)
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}
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equals(other: Month): boolean {
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return this.value === other.value
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}
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isAfter(other: Month): boolean {
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return this.value > other.value
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}
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isBefore(other: Month): boolean {
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return this.value < other.value
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}
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toString(): string {
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return this.value
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}
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getYear(): number {
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return parseInt(this.value.split('-')[0])
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}
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getMonth(): number {
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return parseInt(this.value.split('-')[1])
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}
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}
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