Reads for recursive search paths

gistfile1.scala

// Reads for recursive path
def recursiveSearchReads[T : Reads](path: JsPath) = Reads[Seq[T]] { json =>
  path.apply(json).map(_.validate[T]).foldLeft[JsResult[Seq[T]]](JsSuccess(Nil)) {
    case (JsError(a), JsError(b)) => JsError(a ++ b)
    case (err: JsError, _) => err
    case (_, err: JsError) => err
    case (JsSuccess(ts, _), JsSuccess(t, _)) => JsSuccess(ts :+ t)
  }.repath(path)
}

// Reads for recursive path of arrays, flattened
def recursiveSearchReadsFlatten[T : Reads](path: JsPath) = Reads[Seq[T]] { json =>
  path.apply(json).map(_.validate[Seq[T]]).reduceLeft[JsResult[Seq[T]]] {
    case (JsError(a), JsError(b)) => JsError(a ++ b)
    case (err: JsError, _) => err
    case (_, err: JsError) => err
    case (JsSuccess(a, _), JsSuccess(b, _)) => JsSuccess(a ++ b)
  }.repath(path)
}

Actually we don't have it because nobody asked for it IMHO :D

The equivalent of Future.sequence for JsResult would be cool too.
I thought I had written it somewhere but I don't find it anymore!

I also believe some Reads based on JsZipper would be far more powerful...