openrw/rwengine/include/loaders/BackgroundLoader.hpp

#pragma once

#include <WorkContext.hpp>
#include <data/ResourceHandle.hpp>
#include <core/FileIndex.hpp>

/**
 * Implementation of a worker that loads a resource in the background.
 */
template<class T, class L> class BackgroundLoaderJob : public WorkJob
{
public:
	typedef typename ResourceHandle<T>::Ref TypeRef;

	BackgroundLoaderJob(WorkContext* context, FileIndex* index, const std::string& file, const TypeRef& ref)
	:WorkJob(context), index(index), filename(file), resourceRef(ref)
	{ }

	void work()
	{
		data = index->openFile(filename);
	}


	void complete()
	{
		if( data )
		{
			L loader;
			
			resourceRef->resource = loader.loadFromMemory(data);
			resourceRef->state = RW::Loaded;
		}
	}
private:
	FileIndex* index;
	std::string filename;
	FileHandle data;
	TypeRef resourceRef;
};