UnrealEngineUWP/Engine/Plugins/Runtime/StateTree/Source/StateTreeModule/Public/Blueprint/StateTreeConditionBlueprintBase.h

// Copyright Epic Games, Inc. All Rights Reserved.

#pragma once

#include "CoreMinimal.h"
#include "Templates/SubclassOf.h"
#include "StateTreeTypes.h"
#include "StateTreeConditionBase.h"
#include "StateTreePropertyBindings.h"
#include "StateTreeItemBlueprintBase.h"
#include "StateTreeConditionBlueprintBase.generated.h"

struct FStateTreeExecutionContext;

/*
 * Base class for Blueprint based Conditions. 
 */
UCLASS(Abstract, Blueprintable)
class STATETREEMODULE_API UStateTreeConditionBlueprintBase : public UStateTreeItemBlueprintBase
{
	GENERATED_BODY()
public:

	UFUNCTION(BlueprintImplementableEvent)
	bool ReceiveTestCondition(AActor* OwnerActor);

	virtual bool TestCondition(FStateTreeExecutionContext& Context);
};

/**
 * Wrapper for Blueprint based Conditions.
 */
USTRUCT()
struct STATETREEMODULE_API FStateTreeBlueprintConditionWrapper : public FStateTreeConditionBase
{
	GENERATED_BODY()

	virtual const UStruct* GetInstanceDataType() const override { return ConditionClass; };
	virtual bool Link(FStateTreeLinker& Linker) override;
	virtual bool TestCondition(FStateTreeExecutionContext& Context) const override;

#if WITH_EDITOR
	/** @return Rich text description of the condition. */
	virtual FText GetDescription(const FGuid& ID, FStateTreeDataView InstanceData, const IStateTreeBindingLookup& BindingLookup) const;
#endif
	
	UPROPERTY()
	TSubclassOf<UStateTreeConditionBlueprintBase> ConditionClass = nullptr;

	TArray<FStateTreeBlueprintExternalDataHandle> ExternalDataHandles;
};