Find a JsValue in JsObject In Scala - json

Question

How can I make a recursive function which finds a JsValue in JsObject, for example:
Function input: JsObject and path as String
Examples:
Input for JsObject:
{
"name": "Zvi"
parents: {
"father": {
"name": "myFatherName",
"dob": "10/10/70"
}
}
}
and for path Example:
path = notExistsField
the output will be None
path = name
the input will be Some("Zvi")
path = parents
the output will be
Some({
"father": {
"name": "myFatherName",
"dob": "10/10/70"
}
})
parents.father
the output will be:
Some({
"name": "myFatherName",
"dob": "10/10/70"
})
parents.father.name
the output will be "myFatherName"
Tests Example:
"deepSearch" - {
val payload: JsObject = Json.parse(
"""{
| "key1": 1,
| "key2": {
| "key1": "value21",
| "key2": {
| "key1": 221
| }
| },
|}""".stripMargin).as[JsObject]
"found" - {
"nested" in {
// In Nested Object
service.deepSearch(payload,"key2.key1").get shouldBe JsString("value21")
service.deepSearch(payload,"key2.key2.key1").get shouldBe JsNumber(221)
service.deepSearch(payload,"key2.key2").get shouldBe Json.parse("{\"key1\": 221}")
}
"top-level" in {
service.deepSearch(payload,"key1").get shouldBe JsNumber(1)
}
}
"not found" - {
"nested" in {
service.deepSearch(payload,"key2.key2.key1.notExists").isEmpty shouldBe true
service.deepSearch(payload,"key2.key2.notExists").isEmpty shouldBe true
}
"top-level" in {
service.deepSearch(payload,"Boom").isEmpty shouldBe true
}
}
}

Answer 1

I did the following implementation, Is there any suggestions to prettier code
def deepSearch(payload: JsValue, path: String): JsLookupResult = {
path indexOf (".") match {
// For the Base case:
case base if base < 0 => (payload \ path)
// For the Step case:
case found if found >= 0 =>
val untilFirstDot = path.substring(0, found)
(payload \ untilFirstDot) match {
case JsDefined(newPayload) => deepSearch(newPayload, path.substring(found + 1))
case undefined: JsUndefined => undefined
}
}
}