cron4s.expr.CronExpr.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.expr

import cats.Show

import shapeless._

/**
  * Representation of a valid CRON expression as an AST
  *
  * @author Antonio Alonso Dominguez
  */
final case class CronExpr(
    seconds: SecondsNode,
    minutes: MinutesNode,
    hours: HoursNode,
    daysOfMonth: DaysOfMonthNode,
    months: MonthsNode,
    daysOfWeek: DaysOfWeekNode) {

  private[cron4s] lazy val raw: RawCronExpr = Generic[CronExpr].to(this)

  /**
    * Time part of the CRON expression
    */
  lazy val timePart: TimeCronExpr = TimeCronExpr(seconds, minutes, hours)

  /**
    * Date part of the CRON expression
    */
  lazy val datePart: DateCronExpr = DateCronExpr(daysOfMonth, months, daysOfWeek)

  override lazy val toString: String =
    raw.map(ops.show).toList.mkString(" ")

}

object CronExpr {

  implicit val CronExprShow: Show[CronExpr] =
    Show.fromToString[CronExpr]

}