text: /**
  * MIT License
  *
  * Copyright (c) 2021 Chris
  * 
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  * copies of the Software, and to permit persons to whom the Software is
  * furnished to do so, subject to the following conditions:
  * 
  * The above copyright notice and this permission notice shall be included in all
  * copies or substantial portions of the Software.
  * 
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  **/
  
  #pragma once
  
  #include "CoreMinimal.h"
  #include "GameFramework/HUD.h"
  #include "UserInterface/Widgets/CharacterSelectWidget.h"
  #include "UserInterface/Widgets/LoginWidget.h"
  #include "MLoginHUD.generated.h"
  
  struct FCharacterData;
  
  UCLASS()
  class ALoginHUD : public AHUD
  {
  	GENERATED_BODY()
  
  public:
  
  	template<typename Widget>
  	void CreateMenuWidget();
  	void RegisterNewLoginRequestWithWidget() const;
  	void OnLogin() const;
  	void PushCharacterListToWidget(const TArray<FCharacterData>& UpdatedList) const;
  
  protected:
  
  	UPROPERTY(EditDefaultsOnly, Category = "Menu Widgets")
  	TSubclassOf<ULoginWidget> LoginScreenWidgetClass;
  
  	UPROPERTY(EditDefaultsOnly, Category = "Menu Widgets")
  	TSubclassOf<UCharacterSelectWidget> CharacterSelectWidgetClass;
  
  private:
  
  	UPROPERTY()
  	UCharacterSelectWidget* CharacterSelectWidgetPtr;
  
  	UPROPERTY()
  	ULoginWidget* LoginWidgetPtr;
  };
  
  template <typename Widget>
  void ALoginHUD::CreateMenuWidget()
  {
  	checkNoEntry();
  }
  
  template<>
  inline void ALoginHUD::CreateMenuWidget<ULoginWidget>()
  {
  	if (!LoginWidgetPtr && LoginScreenWidgetClass)
  	{
  		LoginWidgetPtr = CreateWidget<ULoginWidget>(GetOwningPlayerController(), LoginScreenWidgetClass, TEXT("LoginWidget"));
  		check(LoginWidgetPtr);
  		LoginWidgetPtr->AddToViewport();
  		return;
  	}
  
  	LoginWidgetPtr->AddToViewport();
  }
  
  template<>
  inline void ALoginHUD::CreateMenuWidget<UCharacterSelectWidget>()
  {
  	if (!CharacterSelectWidgetPtr && CharacterSelectWidgetClass)
  	{
  		CharacterSelectWidgetPtr = CreateWidget<UCharacterSelectWidget>(
  			GetOwningPlayerController(), CharacterSelectWidgetClass,TEXT("CharacterSelectWidget"));
  		check(CharacterSelectWidgetPtr);
  		CharacterSelectWidgetPtr->AddToViewport();
  		return;
  	}
  
  	CharacterSelectWidgetPtr->AddToViewport();
  }