refactoring

src/main/kotlin/eventDemo/app/entity/Player.kt

@@ -0,0 +1,36 @@
+package eventDemo.app.entity
+
+import eventDemo.configuration.PlayerIdSerializer
+import eventDemo.configuration.UUIDSerializer
+import eventDemo.libs.event.AggregateId
+import io.ktor.server.auth.Principal
+import kotlinx.serialization.Serializable
+import java.util.UUID
+
+@Serializable
+data class Player(
+    val name: String,
+    @Serializable(with = PlayerIdSerializer::class)
+    val id: PlayerId = PlayerId(UUID.randomUUID()),
+) : Principal {
+    constructor(id: String, name: String) : this(
+        name,
+        PlayerId(UUID.fromString(id)),
+    )
+
+    @JvmInline
+    value class PlayerId(
+        @Serializable(with = UUIDSerializer::class)
+        override val id: UUID = UUID.randomUUID(),
+    ) : AggregateId {
+        override fun toString(): String = id.toString()
+    }
+}
+
+@Serializable
+data class PlayerHand(
+    val player: Player,
+    val cards: List<Card> = emptyList(),
+) {
+    val count = lazy { cards.count() }
+}