//////////////////////////////////////////////////////////////
//
// ConsoleOutput
//
// This class can optionally be used by the GameMode
// blueprint to help implement the console window. There is
// no requirement that the blueprint use this class, it can
// implement the console window any way it wants, this is
// just here in case it is desired.
//
// This class stores the text that's in the unreal console.
// It stores it as one great big string, which contains
// newlines to denote line breaks.
//
// This class also contains a 'dirty' bit.  Each time
// somebody appends a line of text to the console, the dirty
// bit is automatically set.  The bit can be checked using
// 'IsDirty' and cleared using 'ClearDirty'.  This makes it
// so that you don't have to update the unreal widget unless
// the text has actually changed.
//
//////////////////////////////////////////////////////////////

#pragma once

#include "Containers/UnrealString.h"

#include "ConsoleOutput.generated.h"


UCLASS(BlueprintType)
class UlxConsoleOutput : public UObject
{
	GENERATED_BODY()

private:
	FString Content;
	bool Dirty;

private:
	// Truncate the console to a reasonable number of
	// lines.  The length is hardwired.
	void Truncate();

	// Add a newline if there isn't one.  Returns true if it changed anything.
	bool MaybeAppendNewline();

	// Append text.  Returns true if it changed anything.
	bool MaybeAppendText(const FString& text);

public:
	// Append a line of text to the console.
	UFUNCTION(BlueprintCallable)
	void Append(const FString& text);

	// Append a line of text to the console on a line by itself.
	UFUNCTION(BlueprintCallable)
	void AppendLine(const FString& text);

	// Get the console text as a string.
	UFUNCTION(BlueprintCallable)
	const FString& Get() const { return Content;  }
	
	// Return if the dirty flag is set.
	UFUNCTION(BlueprintCallable)
	bool IsDirty() const { return Dirty; }

	// Clear the dirty flag.
	UFUNCTION(BlueprintCallable)
	void ClearDirty() { Dirty = false;  }
};