How to validate Complete in AKKA-HTTP - json

Question

I want to validate the result of the complete function of my API, the Response generates a null when it can not transform the String to a Json type, I do not want it to generate null but say: "not found", this is my route:
val route = pathPrefix("auth") {
path("signIn") {
pathEndOrSingleSlash {
post {
entity(as[LoginPassword]) { loginPassword =>
val a = signIn(loginPassword.login, loginPassword.password).map(_.asJson)
if(signIn(loginPassword.login, loginPassword.password).map(_.asJson) == null){
complete(states.map(_.asJson))
}else {
def getObject : Option[Any] = Option(signIn(loginPassword.login, loginPassword.password).map(_.asJson))
val ahh = signIn(loginPassword.login, loginPassword.password).map(_.asJson)
if(getObject.isEmpty || getObject == null){ ///////NOT FOUND
complete("Not Found")
}else {
complete(signIn(loginPassword.login, loginPassword.password).map(_.asJson)
}
//complete(signIn(loginPassword.login, loginPassword.password).map(_.asJson))
}
}
}
}
}
this does not work, since it always enters the else within the condition, responding a Json when it gets the value in BD and null when not.
Function Sign
def signIn(login: String, password: String): Future[Option[TokenEntity]] = {
db.run(users.filter(u => u.username === login).result).flatMap { users =>
users.find(user => Bcrypt.validate(password, user.password)) match {
case Some(user) => db.run(tokens.filter(_.userId === user.id).result.headOption).flatMap {
case Some(token) => Future.successful(Some(token))
case None => createToken(user).map(token => Some(token))
}
case None => Future.successful(None)
}
}
}
The Json library I use is: Json
Some help? Thanks.

Answer 1

I stopped to think things through and how to solve what I needed and first to validate that it was a valid response was to analyze the response of signIn:
Assign the response to a val
val token = signIn(loginPassword.login, loginPassword.password)
token is of type: Future[Option[TokenEntity]] and I need to work with: Option[TokenEntity] and validate if it is a correct answer:
val response = token.map(_ match {
case Some(token) => prepareHttpResponse(StatusCodes.OK, token.asJson.toString)
case None => prepareHttpResponse(StatusCodes.Unauthorized, "{reason: \"not found\"")
})
if it is valid I respond in format Json the Token but I respond with: not found
finally was:
val route = pathPrefix("auth") {
path("signIn") {
post {
entity(as[LoginPassword]) { loginPassword =>
val token = signIn(loginPassword.login, loginPassword.password)
val response = token.map(_ match {
case Some(token) => prepareHttpResponse(StatusCodes.OK, token.asJson.toString)
case None => prepareHttpResponse(StatusCodes.Unauthorized, "{reason: \"not found\"")
})
complete(response)
}
}
}