Function generateCronExpression

apps/sim/lib/workflows/schedules/utils.ts:326–362

(
  scheduleType: string,
  scheduleValues: ReturnType<typeof getScheduleTimeValues>
)

 * @returns Cron expression string representing the schedule in local time
 */
export function generateCronExpression(
  scheduleType: string,
  scheduleValues: ReturnType<typeof getScheduleTimeValues>
): string {
  switch (scheduleType) {
    case 'minutes':
      return `*/${scheduleValues.minutesInterval} * * * *`

    case 'hourly':
      return `${scheduleValues.hourlyMinute} * * * *`

    case 'daily': {
      const [hours, minutes] = scheduleValues.dailyTime
      return `${minutes} ${hours} * * *`
    }

    case 'weekly': {
      const [hours, minutes] = scheduleValues.weeklyTime
      return `${minutes} ${hours} * * ${scheduleValues.weeklyDay}`
    }

    case 'monthly': {
      const [hours, minutes] = scheduleValues.monthlyTime
      return `${minutes} ${hours} ${scheduleValues.monthlyDay} * *`
    }

    case 'custom': {
      if (!scheduleValues.cronExpression?.trim()) {
        throw new Error('Custom schedule requires a valid cron expression')
      }
      return scheduleValues.cronExpression
    }

    default:
      throw new Error(`Unsupported schedule type: ${scheduleType}`)
  }
}

/**
 * Calculate the next run time based on schedule configuration