feat!: implemented multigame support (#34)

Reviewed-on: #34
Co-authored-by: Janis <janis.e.20@gmx.de>
Co-committed-by: Janis <janis.e.20@gmx.de>

knockoutwhistweb/app/controllers/UserController.scala

@@ -0,0 +1,70 @@
+package controllers
+
+import auth.{AuthAction, AuthenticatedRequest}
+import logic.user.{SessionManager, UserManager}
+import play.api.*
+import play.api.mvc.*
+
+import javax.inject.*
+
+
+/**
+ * This controller creates an `Action` to handle HTTP requests to the
+ * application's home page.
+ */
+@Singleton
+class UserController @Inject()(
+                                val controllerComponents: ControllerComponents,
+                                val sessionManager: SessionManager,
+                                val userManager: UserManager,
+                                val authAction: AuthAction
+                              ) extends BaseController {
+
+  def login(): Action[AnyContent] = {
+    Action { implicit request =>
+      val session = request.cookies.get("sessionId")
+      if (session.isDefined) {
+        val possibleUser = sessionManager.getUserBySession(session.get.value)
+        if (possibleUser.isDefined) {
+          Redirect(routes.MainMenuController.mainMenu())
+        } else {
+          Ok(views.html.login.login())
+        }
+      } else {
+        Ok(views.html.login.login())
+      }
+    }
+  }
+
+  def login_Post(): Action[AnyContent] = {
+    Action { implicit request =>
+      val postData = request.body.asFormUrlEncoded
+      if (postData.isDefined) {
+        // Extract username and password from form data
+        val username = postData.get.get("username").flatMap(_.headOption).getOrElse("")
+        val password = postData.get.get("password").flatMap(_.headOption).getOrElse("")
+        val possibleUser = userManager.authenticate(username, password)
+        if (possibleUser.isDefined) {
+          Redirect(routes.MainMenuController.mainMenu()).withCookies(
+            Cookie("sessionId", sessionManager.createSession(possibleUser.get))
+          )
+        } else {
+          println("Failed login attempt for user: " + username)
+          Unauthorized("Invalid username or password")
+        }
+      } else {
+        BadRequest("Invalid form submission")
+      }
+    }
+  }
+
+  // Pass the request-handling function directly to authAction (no nested Action)
+  def logout(): Action[AnyContent] = authAction { implicit request: AuthenticatedRequest[AnyContent] =>
+    val sessionCookie = request.cookies.get("sessionId")
+    if (sessionCookie.isDefined) {
+      sessionManager.invalidateSession(sessionCookie.get.value)
+    }
+    NoContent.discardingCookies(DiscardingCookie("sessionId"))
+  }
+
+}