Calendar/src/v2/core/DateService.ts

import dayjs from 'dayjs';
import { ITimeFormatConfig } from './ITimeFormatConfig';

export class DateService {
  constructor(private config: ITimeFormatConfig) {}

  parseISO(isoString: string): Date {
    return dayjs(isoString).toDate();
  }

  getDayName(date: Date, format: 'short' | 'long' = 'short'): string {
    return new Intl.DateTimeFormat(this.config.locale, { weekday: format }).format(date);
  }

  getWeekDates(offset = 0): string[] {
    const monday = dayjs().startOf('week').add(1, 'day').add(offset, 'week');
    return Array.from({ length: 7 }, (_, i) =>
      monday.add(i, 'day').format('YYYY-MM-DD')
    );
  }
}