ZIO learning - learning&testing zio-json features / published by https://github.com/dacr/code-examples-manager #3cfd0c94-0e36-4ddf-848d-5de9dba757d5/ce13a78cb527b443c646a6838d329619a55c43d3

zio-learning-json-1-hello.sc

// summary : ZIO learning - learning&testing zio-json features
// keywords : scala, zio, learning, json, pure-functional, @testable
// publish : gist
// authors : David Crosson
// license : Apache NON-AI License Version 2.0 (https://raw.githubusercontent.com/non-ai-licenses/non-ai-licenses/main/NON-AI-APACHE2)
// id : 3cfd0c94-0e36-4ddf-848d-5de9dba757d5
// created-on : 2021-04-09T17:24:04Z
// managed-by : https://github.com/dacr/code-examples-manager
// run-with : scala-cli $file

// ---------------------
//> using scala  "3.2.2"
//> using dep "dev.zio::zio:2.0.13"
//> using dep "dev.zio::zio-json:0.5.0"
//> using options "-Yretain-trees" // When case classes are using default values
// ---------------------

import zio.*
import zio.json.*
import java.time.Instant

case class Address(
  town: String,
  country: String,
  planet: Option[String]
) derives JsonCodec

case class Person(
  name: String,
  age: Int,
  birthDate: Instant,
  addresses: List[Address]
) derives JsonCodec

object Encapsulated extends ZIOAppDefault:
  val json =
    """{
      |  "name":"joe",
      |  "age":42,
      |  "birthDate":"2021-04-09T17:19:17.000Z",
      |  "addresses":[ {"town":"london","country":"uk"} ]
      |}""".stripMargin

  def run =
    for
      person <- ZIO.fromEither(json.fromJson[Person])
      _      <- Console.printLine(person.toJsonPretty)
    yield ()

Encapsulated.main(Array.empty)