Program Listing for File ecs_factory.h

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#pragma once

#include "common/common.h"
#include "core/resource_files/text_resource_file.h"

#include "scene.h"
#include "entity.h"

#include "utility/component_array.h"

typedef unsigned int ComponentID;
class Component;

class BaseComponentSet
{
public:
    virtual bool addComponent(Entity& owner, const JSON::json& componentData, bool checks = true) = 0;
    virtual bool addDefaultComponent(Entity& owner, bool checks) = 0;
    virtual bool removeComponent(Entity& entity) = 0;
    virtual const String& getName() const = 0;
    virtual const String& getCategory() const = 0;
    virtual const ComponentID& getID() const = 0;
};

template <class T>
class ComponentSet : public BaseComponentSet
{
    ComponentArray<T> m_Instances;

public:
    ComponentSet() = default;
    ComponentSet(const ComponentSet&) = delete;
    ComponentSet& operator=(const ComponentSet&) = delete;

    ComponentArray<T>& getAll() { return m_Instances; }

    bool addComponent(Entity& owner, const JSON::json& componentData, bool checks) override
    {
        if (!owner.hasComponent(T::s_ID))
        {
            m_Instances.emplace_back(owner, componentData);

            if (checks && !owner.onAllComponentsAdded())
            {
                if (owner.hasComponent(T::s_ID))
                {
                    owner.removeComponent(T::s_ID, true);
                }
                return false;
            }
            return true;
        }

        WARN("Entity already has a " + T::s_Name + ": " + owner.getFullName());
        return false;
    }

    bool addDefaultComponent(Entity& owner, bool checks) override
    {
        return addComponent(owner, JSON::json::object(), checks);
    }

    bool removeComponent(Entity& entity) override
    {
        return m_Instances.erase(entity);
    }

    const String& getName() const override { return T::s_Name; };
    const String& getCategory() const override { return T::s_Category; };
    const ComponentID& getID() const override { return T::s_ID; };
};

namespace ECSFactory
{
extern HashMap<String, Ptr<BaseComponentSet>> s_ComponentSets;

void Initialize();

void FillEntity(Entity& entity, const JSON::json& entityJSON);
void FillEntityFromFile(Entity& entity, TextResourceFile* textResourceFile);
void FillRootEntity(Entity& root);

void CopyEntity(Entity& entity, Entity& copyTarget);
String GetComponentNameByID(ComponentID componentID);
ComponentID GetComponentIDByName(const String& componentName);

bool AddComponent(Entity& entity, ComponentID componentID, const JSON::json& componentData, bool checks = true);
bool AddDefaultComponent(Entity& entity, ComponentID componentID, bool checks = true);
bool RemoveComponent(Entity& entity, ComponentID componentID);
};