absg/Source/SpaceBattler/Private/StateMachineSubsystem.cpp

// Fill out your copyright notice in the Description page of Project Settings.


#include "StateMachineSubsystem.h"

void UStateMachineSubsystem::Initialize(FSubsystemCollectionBase& Collection)
{
	Super::Initialize(Collection);
	CurrentState = EGameState::MainMenu;
	UE_LOG(LogTemp, Display, TEXT("Starting game state machine in MAINMENU state"))
}

bool UStateMachineSubsystem::ChangeState(const EGameState NewState)
{
	// Exit from old state
	switch (CurrentState)
	{
	case EGameState::MainMenu:
		switch(NewState)
		{
		case EGameState::Battle:
			UE_LOG(LogTemp, Display, TEXT("Entering BATTLE state from MAINMENU"))
			break;
		default:
			UE_LOG(LogTemp, Error, TEXT("NewState is invalid from MAINMENU state: %hhd"), NewState)
			return false;
		}
		break;
	case EGameState::Battle:
		switch(NewState)
		{
		case EGameState::Battle:
			UE_LOG(LogTemp, Warning, TEXT("Entering BATTLE state from BATTLE.  Should only be possible when debugging"))
			break;
		case EGameState::BattleMenu:
			UE_LOG(LogTemp, Display, TEXT("Entering BATTLEMENU state from BATTLE"))
			break;
		case EGameState::GameOver:
			UE_LOG(LogTemp, Display, TEXT("Entering GAMEOVER state from BATTLE"))
			break;
		case EGameState::Victory:
			UE_LOG(LogTemp, Display, TEXT("Entering VICTORY state from BATTLE"))
			break;
		default:
			UE_LOG(LogTemp, Error, TEXT("NewState is invalid from BATTLE state: %hhd"), NewState)
			return false;
		}
		break;
	case EGameState::BattleMenu:
		switch(NewState)
		{
		case EGameState::Battle:
			UE_LOG(LogTemp, Display, TEXT("Entering BATTLE state from BATTLEMENU"))
			break;
		default:
			UE_LOG(LogTemp, Error, TEXT("NewState is invalid from BATTLEMENU state: %hhd"), NewState)
			return false;
		}
		break;
	case EGameState::GameOver:
		switch(NewState)
		{
		case EGameState::MainMenu:
			UE_LOG(LogTemp, Display, TEXT("Entering MAINMENU state from GAMEOVER"))
			break;
		default:
			UE_LOG(LogTemp, Error, TEXT("NewState is invalid from GAMEOVER: %hhd"), NewState)
			return false;
		}
		break;
	case EGameState::Victory:
		switch(NewState)
		{
		case EGameState::MainMenu:
			UE_LOG(LogTemp, Display, TEXT("Entering MAINMENU state from VICTORY"))
				break;
		default:
			UE_LOG(LogTemp, Error, TEXT("NewState is invalid from VICTORY: %hhd"), NewState)
			return false;
		}
	default:
		UE_LOG(LogTemp, Error, TEXT("Leaving unknown state, this is a problem"))
		return false;
	}

	CurrentState = NewState;
	StateChangedDelegate.Broadcast(NewState);
	return true;
}