Refactor

src/main/kotlin/eventDemo/app/actions/playNewCard/PlayCardCommandHandler.kt

@@ -0,0 +1,26 @@
+package eventDemo.app.actions.playNewCard
+
+import eventDemo.shared.command.GameCommandStream
+import eventDemo.shared.event.CardIsPlayedEvent
+import eventDemo.shared.event.GameEventStream
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+
+/**
+ * Listen [PlayCardCommand] on [GameCommandStream], check the validity and execute the action.
+ * This action produces a new [CardIsPlayedEvent]
+ */
+class PlayCardCommandHandler(
+    private val commandStream: GameCommandStream,
+    private val eventStream: GameEventStream,
+) {
+    operator fun invoke() {
+        CoroutineScope(Dispatchers.IO).launch {
+            commandStream.process {
+                // TODO check the command can be executed
+                eventStream.publish(CardIsPlayedEvent(it.payload.game.id, it.payload.card))
+            }
+        }
+    }
+}