feat: BAC-39 Authentication (#114)

Reviewed-on: #114
Co-authored-by: Janis <janis.e.20@gmx.de>
Co-committed-by: Janis <janis.e.20@gmx.de>

knockoutwhistweb/app/model/sessions/UserSession.scala

@@ -26,8 +26,11 @@ class UserSession(val user: User, val host: Boolean, val gameLobby: GameLobby) e
         else canInteract = Some(InteractionType.Card)
       case _ =>
     }
+    
+    lock.lock()
     websocketActor.foreach(_.solveRequests())
     websocketActor.foreach(_.transmitEventToClient(event))
+    lock.unlock()
   }
 
   override def id: UUID = user.id

knockoutwhistweb/app/model/users/UserEntity.scala

@@ -0,0 +1,80 @@
+package model.users
+
+import jakarta.persistence.*
+
+import java.time.LocalDateTime
+import java.util.UUID
+import scala.compiletime.uninitialized
+
+@Entity
+@Table(name = "users")
+class UserEntity {
+
+  @Id
+  @GeneratedValue(strategy = GenerationType.IDENTITY)
+  var id: Long = uninitialized
+
+  @Column(name = "uuid", nullable = false, unique = true)
+  var uuid: UUID = uninitialized
+
+  @Column(name = "username", nullable = false, unique = true)
+  var username: String = uninitialized
+
+  @Column(name = "password_hash", nullable = false)
+  var passwordHash: String = uninitialized
+
+  @Column(name = "openid_provider")
+  var openidProvider: String = uninitialized
+
+  @Column(name = "openid_provider_id")
+  var openidProviderId: String = uninitialized
+
+  @Column(name = "created_at", nullable = false)
+  var createdAt: LocalDateTime = uninitialized
+
+  @Column(name = "updated_at", nullable = false)
+  var updatedAt: LocalDateTime = uninitialized
+
+  @PrePersist
+  def onCreate(): Unit = {
+    val now = LocalDateTime.now()
+    createdAt = now
+    updatedAt = now
+    if (uuid == null) {
+      uuid = UUID.randomUUID()
+    }
+  }
+
+  @PreUpdate
+  def onUpdate(): Unit = {
+    updatedAt = LocalDateTime.now()
+  }
+
+  def toUser: User = {
+    User(
+      internalId = id,
+      id = uuid,
+      name = username,
+      passwordHash = passwordHash
+    )
+  }
+}
+
+object UserEntity {
+  def fromUser(user: User): UserEntity = {
+    val entity = new UserEntity()
+    entity.uuid = user.id
+    entity.username = user.name
+    entity.passwordHash = user.passwordHash
+    entity
+  }
+
+  def fromOpenIDUser(username: String, userInfo: services.OpenIDUserInfo): UserEntity = {
+    val entity = new UserEntity()
+    entity.username = username
+    entity.passwordHash = "" // No password for OpenID users
+    entity.openidProvider = userInfo.provider
+    entity.openidProviderId = userInfo.id
+    entity
+  }
+}