circe_attempt

import cats.syntax.either._
import io.circe._
import io.circe.optics.JsonPath._
import io.circe.parser._

val json = parse(s"""
      {
        "items": [
          {
            "identifiers": [
              {
                "identifierScheme": "antarctica",
                "value": "husvik"
              },
              {
                "identifierScheme": "greece",
                "value": "spinalonga"
              },
              {
                "identifierScheme": "ireland",
                "value": "waterfoot"
              }
            ],
            "type": "ghost towns"
          },
          {
            "identifiers": [
              {
                "identifierScheme": "ocean",
                "value": "atlantis"
              },
              {
                "identifierScheme": "regal",
                "value": "camelot"
              }
            ],
            "type": "mythological places"
          }
        ],
        "title": "A letter about loss",
        "lettering": "things we lose have a way of coming back to us in the end, if not always in the way we expect",
        "subjects": [
          {
            "label": "Loss and grief",
            "type": "Concept"
          },
          {
            "label": "Resurrection and renaming",
            "identifiers": [
              {
                "identifierScheme": "england",
                "value": "lundenwic"
              },
              {
                "identifierScheme": "scotland",
                "value": "dunedin"
              }
            ],
            "type": "cities that were renamed"
          }
        ]
      }
      """).getOrElse(Json.Null)

val pathToObjectWithIdentifiers = root
  .each.filter(j => j.isArray)
  .each.filter(j=> j.asObject.exists(obj => obj.contains("identifiers")))

//getting all objects with identifiers works
val objectsWithIdentifiers = pathToObjectWithIdentifiers.obj.getAll(json)
print(objectsWithIdentifiers.size)

//this does not compile
pathToObjectWithIdentifiers.each
      .modify((json: JsonObject) => {
    json.+:(("canonicalId", Json.fromString("hgsvd")))})