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Tagless, non-blocking data access library for Postgres.

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// Copyright (c) 2018-2021 by Rob Norris
// This software is licensed under the MIT License (MIT).
// For more information see LICENSE or https://opensource.org/licenses/MIT

package skunk.util

import cats.Functor
import cats.effect.Ref
import cats.syntax.all._

trait Namer[F[_]] {
  def nextName(prefix: String): F[String]
}

object Namer {

  def apply[F[_]: Functor: Ref.Make]: F[Namer[F]] =
    Ref[F].of(1).map { ctr =>
      new Namer[F] {
        override def nextName(prefix: String): F[String] =
          ctr.modify(n => (n + 1, s"${prefix}_$n"))
      }
    }

}