From 3cf6416f4c179619499c974cb4a0a9c5138406bb Mon Sep 17 00:00:00 2001
From: Alejandro Metke Jimenez <ametke@squareup.com>
Date: Thu, 4 Dec 2025 17:02:48 +1000
Subject: [PATCH] Add serialisation plugin and fix hurdle and hurdle responses
 class structure to be serialisable automatically

---
 lib/build.gradle.kts                             |  1 +
 .../main/kotlin/xyz/block/domainapi/DomainApi.kt | 16 +++++++++++-----
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/lib/build.gradle.kts b/lib/build.gradle.kts
index 93c1ad1..e56965a 100644
--- a/lib/build.gradle.kts
+++ b/lib/build.gradle.kts
@@ -2,6 +2,7 @@ plugins {
   id("java-library")
   id("org.jetbrains.kotlin.jvm")
   id("com.vanniktech.maven.publish") version "0.34.0"
+  kotlin("plugin.serialization") version "1.9.0"
 }
 
 repositories {
diff --git a/lib/src/main/kotlin/xyz/block/domainapi/DomainApi.kt b/lib/src/main/kotlin/xyz/block/domainapi/DomainApi.kt
index 9d8c3fd..a593ccf 100644
--- a/lib/src/main/kotlin/xyz/block/domainapi/DomainApi.kt
+++ b/lib/src/main/kotlin/xyz/block/domainapi/DomainApi.kt
@@ -170,7 +170,10 @@ sealed class UserInteraction<REQUIREMENT_ID> {
  * Represents an input into the system for a requirement.
  */
 @Serializable
-sealed class Input<REQUIREMENT_ID>(val id: REQUIREMENT_ID, val result: ResultCode) {
+sealed class Input<REQUIREMENT_ID> {
+  abstract val id: REQUIREMENT_ID
+  abstract val result: ResultCode
+
   /**
    * Represents the response to a server sent to the client.
    *
@@ -178,8 +181,10 @@ sealed class Input<REQUIREMENT_ID>(val id: REQUIREMENT_ID, val result: ResultCod
    * @param code The result of attempting to overcome the hurdle.
    */
   @Serializable
-  open class HurdleResponse<REQUIREMENT_ID>(id: REQUIREMENT_ID, code: ResultCode) :
-    Input<REQUIREMENT_ID>(id, code)
+  open class HurdleResponse<REQUIREMENT_ID>(
+    override val id: REQUIREMENT_ID,
+    override val result: ResultCode
+  ) : Input<REQUIREMENT_ID>()
 
   /**
    * A result sent to the business process as part of a resume operation. If there is specific data
@@ -190,8 +195,9 @@ sealed class Input<REQUIREMENT_ID>(val id: REQUIREMENT_ID, val result: ResultCod
    * @param id The id of the requirement whose result is needed to resume the process.
    */
   @Serializable
-  open class ResumeResult<REQUIREMENT_ID>(id: REQUIREMENT_ID) :
-    Input<REQUIREMENT_ID>(id, ResultCode.CLEARED)
+  open class ResumeResult<REQUIREMENT_ID>(override val id: REQUIREMENT_ID) : Input<REQUIREMENT_ID>() {
+    override val result: ResultCode = ResultCode.CLEARED
+  }
 }
 
 /** The possible results of attempting to overcome a hurdle. */