org.alephium.api.model.CounterRange.scala Maven / Gradle / Ivy

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// Copyright 2018 The Alephium Authors
// This file is part of the alephium project.
//
// The library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the library. If not, see .

package org.alephium.api.model

import sttp.tapir.{ValidationResult, Validator}

final case class CounterRange(start: Int, limitOpt: Option[Int])

object CounterRange {
  val MaxCounterRange: Int = 100

  val validator: Validator[CounterRange] = Validator.custom { counterRange =>
    if (counterRange.start < 0) {
      ValidationResult.Invalid(s"`start` must not be negative")
    } else {
      counterRange.limitOpt match {
        case Some(limit) =>
          if (limit <= 0) {
            ValidationResult.Invalid(s"`limit` must be larger than 0")
          } else if (limit > MaxCounterRange) {
            ValidationResult.Invalid(
              s"`limit` must not be larger than ${MaxCounterRange}"
            )
          } else {
            ValidationResult.Valid
          }
        case None =>
          if (counterRange.start > Int.MaxValue - MaxCounterRange) {
            ValidationResult.Invalid(
              s"`start` must be smaller than ${Int.MaxValue - MaxCounterRange}"
            )
          } else {
            ValidationResult.Valid
          }
      }
    }
  }
}