1 /*
2  *  Make.org Core API
3  *  Copyright (C) 2020 Make.org
4  *
5  * This program is free software: you can redistribute it and/or modify
6  *  it under the terms of the GNU Affero General Public License as
7  *  published by the Free Software Foundation, either version 3 of the
8  *  License, or (at your option) any later version.
9  *
10  *  This program is distributed in the hope that it will be useful,
11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  *  GNU Affero General Public License for more details.
14  *
15  *  You should have received a copy of the GNU Affero General Public License
16  *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
17  *
18  */
19 
20 package org.make.api.technical
21 
22 import akka.http.scaladsl.common.RepeatedValueReceptacle
23 import akka.http.scaladsl.server.directives.ParameterDirectives.ParamSpec
24 import akka.http.scaladsl.server.Directives
25 import akka.http.scaladsl.unmarshalling.FromStringUnmarshaller
26 
27 final case class CsvReceptacle[T](underlying: RepeatedValueReceptacle[Seq[T]])
28 
29 object CsvReceptacle extends Directives {
30 
31   implicit class RepeatedCsvFlatteningParamOps(val name: String) extends AnyVal {
32     def csv[T]: CsvReceptacle[T] = CsvReceptacle(name.as[Seq[T]].*)
33   }
34 
35   implicit def paramSpec[T: FromStringUnmarshaller](a: CsvReceptacle[T]): ParamSpec.Aux[Option[Seq[T]]] =
36     ParamSpec(
37       ParamSpec.forRepVR(a.underlying).get.map(nested => if (nested.isEmpty) None else Some(nested.flatten.toSeq))
38     )
39 
40 }