Handling non-default nested Json Reads - scala

Question

So I have following JSON:
{
"senderEmail" : "sender#email.com",
"recipientEmails" : ["first#email.com", "second#email.com"]
}
and would like to map it to case class:
case class Payload (senderEmail: String, recipientEmails: Seq[String])
using Play's Json Reads with email validator.
While it's trivial for a senderEmail, I'm having trouble with recipientEmails since it's both Seq and email so this will not work:
implicit val payloadRead: Reads[Payload] = (
(JsPath \ "senderEmail").read[String](Reads.email) and
(JsPath \ "recipientEmails").read[Seq[String]](Reads.seq))(Payload.apply _)
I'm getting overloaded method value read with alternatives.
So how can I combine both Reads.seq and Reads.email?

Answer 1

Just keep it simple ...
scala> import play.api.libs.json._
scala> import play.api.libs.functional.syntax._
scala> case class Payload (senderEmail: String, recipientEmails: Seq[String])
defined class Payload
scala> implicit val reads: Reads[Payload] = (
| (JsPath \ "senderEmail").read(Reads.email) and
| (JsPath \ "recipientEmails").read(Reads.seq(Reads.email))
| )(Payload.apply _)
reads: play.api.libs.json.Reads[Payload] = play.api.libs.json.Reads$$...
scala> Json.parse("""{
| "senderEmail" : "sender#email.com",
| "recipientEmails" : ["first#email.com", "second#email.com"]
| }""").validate[Payload]
res0: play.api.libs.json.JsResult[Payload] = JsSuccess(Payload(sender#email.com,Vector(first#email.com, second#email.com)),)