SHADE_Y3/SHADE_Managed/src/Engine/GameObject.cxx

/************************************************************************************//*!
\file           GameObject.cxx
\author         Tng Kah Wei, kahwei.tng, 390009620
\par            email: kahwei.tng\@digipen.edu
\date           Oct 28, 2021
\brief          Contains the definition of the functions for the GameObject managed class.

                Note: This file is written in C++17/CLI.
 
Copyright (C) 2021 DigiPen Institute of Technology.
Reproduction or disclosure of this file or its contents without the prior written consent 
of DigiPen Institute of Technology is prohibited.
*//*************************************************************************************/
// Precompiled Headers
#include "SHpch.h"
// Primary Header
#include "GameObject.hxx"
// External Dependencies
#include "ECS_Base/Managers/SHEntityManager.h"
// Project Headers
#include "ECS.hxx"
#include "Scripts/ScriptStore.hxx"

namespace SHADE
{
    /*---------------------------------------------------------------------------------*/
    /* Static Functions                                                                */
    /*---------------------------------------------------------------------------------*/
    GameObject GameObject::Create()
    {
        return GameObject(SHEntityManager::CreateEntity());
    }

    void GameObject::Destroy(GameObject obj)
    {
        SHEntityManager::DestroyEntity(static_cast<EntityID>(obj.GetEntity()));
    }

    System::Nullable<GameObject> GameObject::Find(System::String ^ name)
    {
        // Search the GameObjectLibrary for an Entity with the specified name
        throw gcnew System::NotImplementedException();
    }
    
    /*---------------------------------------------------------------------------------*/
    /* Properties                                                                      */
    /*---------------------------------------------------------------------------------*/
    System::String^ GameObject::Name::get()
    {
        return Convert::ToCLI(GetNativeEntity().name);
        
    }    
    bool GameObject::IsActiveSelf::get()
    {
        return GetNativeEntity().GetActive();
    }
    bool GameObject::IsActiveInHierarchy::get()
    {
        return true; // TODO: Update once we have an equivalent on the Entity object
    }
    
    /*---------------------------------------------------------------------------------*/
    /* GameObject Property Functions                                                   */
    /*---------------------------------------------------------------------------------*/
    void GameObject::SetName(System::String^ name)
    {
        GetNativeEntity().name = Convert::ToNative(name);
    }
    void GameObject::SetActive(bool active)
    {
        GetNativeEntity().SetActive(active);
    }

    /*---------------------------------------------------------------------------------*/
    /* Component Functions                                                             */
    /*---------------------------------------------------------------------------------*/
    generic <typename T>
    T GameObject::AddComponent()
    {
        return ECS::AddComponent<T>(entity);
    }

    generic <typename T>
    T GameObject::GetComponent()
    {
        return ECS::GetComponent<T>(entity);
    }

    generic <typename T>
    T GameObject::GetComponentInChildren()
    {
        return ECS::GetComponentInChildren<T>(entity);
    }

    generic <typename T>
    T GameObject::EnsureComponent()
    {
        return ECS::EnsureComponent<T>(entity);
    }

    generic <typename T>
    void GameObject::RemoveComponent()
    {
        ECS::RemoveComponent<T>(entity);
    }
    
    /*---------------------------------------------------------------------------------*/
    /* Script Access Functions                                                         */
    /*---------------------------------------------------------------------------------*/
    generic <typename T>
    T GameObject::AddScript()
    {
        return ScriptStore::AddScript<T>(entity);
    }

    generic <typename T>
    T GameObject::GetScript()
    {
        return ScriptStore::GetScript<T>(entity);
    }

    generic <typename T>
    T GameObject::GetScriptInChildren()
    {
        return ScriptStore::GetScriptInChildren<T>(entity);
    }

    generic <typename T>
    System::Collections::Generic::IEnumerable<T>^ GameObject::GetScripts()
    {
        return ScriptStore::GetScripts<T>(entity);
    }

    generic <typename T>
    void GameObject::RemoveScript()
    {
        ScriptStore::RemoveScript<T>(entity);
    }

    /*---------------------------------------------------------------------------------*/
    /* Constructors                                                                    */
    /*---------------------------------------------------------------------------------*/
    GameObject::GameObject(const SHEntity& entity)
    : entity { entity.GetEID() }
    {}

    GameObject::GameObject(Entity entity)
    : entity { entity }
    {}
    
    /*---------------------------------------------------------------------------------*/
    /* Getters                                                                         */
    /*---------------------------------------------------------------------------------*/
    SHEntity& GameObject::GetNativeEntity()
    {
        SHEntity* nativeEntity = SHEntityManager::GetEntityByID(entity);
        if (nativeEntity == nullptr)
            throw gcnew System::InvalidOperationException("[GameObject] Unable to obtain native Entity for GameObject.");

        return *nativeEntity;
    }

    /*---------------------------------------------------------------------------------*/
    /* IEquatable                                                                      */
    /*---------------------------------------------------------------------------------*/
    bool GameObject::Equals(GameObject other)
    {
        return entity == other.entity;
    }
    
    /*---------------------------------------------------------------------------------*/
    /* Object                                                                          */
    /*---------------------------------------------------------------------------------*/
    bool GameObject::Equals(Object^ o)
    {
        try
        {
            GameObject^ cmp = safe_cast<GameObject^>(o);
            return Equals(cmp);
        }
        catch (System::InvalidCastException^)
        {
            return false;
        }
    }

    int GameObject::GetHashCode()
    {
        return entity.GetHashCode();
    }

    bool GameObject::operator==(GameObject lhs, GameObject rhs)
    {
        return lhs.Equals(rhs);
    }

    bool GameObject::operator!=(GameObject lhs, GameObject rhs)
    {
        return !(lhs == rhs);
    }
}