import gleam/io
import squirtle.{String, Add, Replace, Remove}

pub fn main() {
  let assert Ok(doc) = squirtle.parse("{\"name\": \"John\", \"age\": 30}")

  let patches = [
    Replace(path: "/name", value: String("Jane")),
    Add(path: "/email", value: String("[email protected]")),
    Remove(path: "/age"),
  ]

  case squirtle.apply(doc, patches) {
    Ok(result) -> io.println(squirtle.to_string(result))
    // => {"name":"Jane","email":"[email protected]"}
    Error(err) -> io.println("Patch failed: " <> squirtle.error_to_string(err))
  }
}

import gleam/dict
import squirtle.{String, Int, Object}

pub fn main() {
  let old = Object(dict.from_list([#("name", String("John"))]))
  let new = Object(dict.from_list([
    #("name", String("Jane")),
    #("age", Int(30)),
  ]))

  let patches = squirtle.diff(from: old, to: new)
  // => [Replace("/name", String("Jane")), Add("/age", Int(30))]

  let assert Ok(result) = squirtle.apply(old, patches)
  // result == new
}

import gleam/dynamic/decode
import gleam/json
import squirtle

pub fn apply_patch_request(doc_json: String, patches_json: String) {
  let assert Ok(doc) = json.parse(doc_json, squirtle.decoder())
  let assert Ok(patches) = json.parse(patches_json, decode.list(squirtle.patch_decoder()))

  squirtle.apply(doc, patches)
}