cron4s.CronField.scala Maven / Gradle / Ivy

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CRON expression parser for Scala

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/*
 * Copyright 2017 Antonio Alonso Dominguez
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cron4s

import cats.{Eq, Show}

/**
  * Each of the different fields supported in CRON expressions
  *
  * @author Antonio Alonso Dominguez
  */
sealed trait CronField extends Serializable
object CronField extends CronFieldInstances {

  sealed trait Second extends CronField
  case object Second extends Second

  sealed trait Minute extends CronField
  case object Minute extends Minute

  sealed trait Hour extends CronField
  case object Hour extends Hour

  sealed trait DayOfMonth extends CronField
  case object DayOfMonth extends DayOfMonth

  sealed trait Month extends CronField
  case object Month extends Month

  sealed trait DayOfWeek extends CronField
  case object DayOfWeek extends DayOfWeek

  final val All: List[CronField] = List(Second, Minute, Hour, DayOfMonth, Month, DayOfWeek)

}

private[cron4s] trait CronFieldInstances {

  implicit val cronFieldEq: Eq[CronField] = Eq.fromUniversalEquals[CronField]

  implicit val cronFieldShow: Show[CronField] = Show.fromToString

}