@rschedule/rschedule/src/lib/rule/pipes/rev-07-by-hour-of-day.pipe.ts

A typescript library for working with recurring dates and events.

import { IByHourOfDayRuleOptions } from './07-by-hour-of-day.pipe';
import { IPipeRule, IPipeRunFn, PipeRule } from './interfaces';

export class RevByHourOfDayPipe extends PipeRule<IByHourOfDayRuleOptions>
  implements IPipeRule<IByHourOfDayRuleOptions> {
  run(args: IPipeRunFn) {
    if (args.invalidDate) {
      return this.nextPipe.run(args);
    }

    let { date } = args;

    const currentHour = date.get('hour');

    for (const hour of this.options.byHourOfDay) {
      if (currentHour < hour) continue;

      if (currentHour === hour) return this.nextPipe.run({ date });

      return this.nextValidDate(args, date.endGranularity('day').set('hour', hour));
    }

    date = date
      .endGranularity('day')
      .subtract(1, 'day')
      .set('hour', this.options.byHourOfDay[0]);

    return this.nextValidDate(args, date);
  }
}