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/**
 * @file llmaterialmgr.h
 * @brief Material manager
 *
 * $LicenseInfo:firstyear=2006&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#ifndef LL_LLMATERIALMGR_H
#define LL_LLMATERIALMGR_H

#include "llmaterial.h"
#include "llmaterialid.h"
#include "llsingleton.h"
#include "httprequest.h"
#include "httpheaders.h"
#include "httpoptions.h"

class LLViewerRegion;

class LLMaterialMgr : public LLSingleton<LLMaterialMgr>
{
	LLSINGLETON(LLMaterialMgr);
	virtual ~LLMaterialMgr();

public:
	typedef std::map<LLMaterialID, LLMaterialPtr> material_map_t;

	typedef boost::signals2::signal<void (const LLMaterialID&, const LLMaterialPtr)> get_callback_t;
	const LLMaterialPtr         get(const LLUUID& region_id, const LLMaterialID& material_id);
	boost::signals2::connection get(const LLUUID& region_id, const LLMaterialID& material_id, get_callback_t::slot_type cb);

	typedef boost::signals2::signal<void (const LLMaterialID&, const LLMaterialPtr, U32 te)> get_callback_te_t;
	boost::signals2::connection getTE(const LLUUID& region_id, const LLMaterialID& material_id, U32 te, get_callback_te_t::slot_type cb);

	typedef boost::signals2::signal<void (const LLUUID&, const material_map_t&)> getall_callback_t;
	void                        getAll(const LLUUID& region_id);
	boost::signals2::connection getAll(const LLUUID& region_id, getall_callback_t::slot_type cb);
	void put(const LLUUID& object_id, const U8 te, const LLMaterial& material);
	void remove(const LLUUID& object_id, const U8 te);
	
	//explicitly add new material to material manager
	void setLocalMaterial(const LLUUID& region_id, LLMaterialPtr material_ptr);

private:
	void clearGetQueues(const LLUUID& region_id);
	bool isGetPending(const LLUUID& region_id, const LLMaterialID& material_id) const;
	bool isGetAllPending(const LLUUID& region_id) const;
	void markGetPending(const LLUUID& region_id, const LLMaterialID& material_id);
	const LLMaterialPtr setMaterial(const LLUUID& region_id, const LLMaterialID& material_id, const LLSD& material_data);
	void setMaterialCallbacks(const LLMaterialID& material_id, const LLMaterialPtr material_ptr);
	
	static void onIdle(void*);

    static void CapsRecvForRegion(const LLUUID& regionId, LLUUID regionTest, std::string pumpname);

	void processGetQueue();
    void processGetQueueCoro();
	void onGetResponse(bool success, const LLSD& content, const LLUUID& region_id);
	void processGetAllQueue();
    void processGetAllQueueCoro(LLUUID regionId);
	void onGetAllResponse(bool success, const LLSD& content, const LLUUID& region_id);
	void processPutQueue();
	void onPutResponse(bool success, const LLSD& content);
	void onRegionRemoved(LLViewerRegion* regionp);

private:
	// struct for TE-specific material ID query
	class TEMaterialPair
	{
	public:

		U32 te;
		LLMaterialID materialID;

		bool operator==(const TEMaterialPair& b) const { return (materialID == b.materialID) && (te == b.te); }
	};
	
	friend inline bool operator<(
		const LLMaterialMgr::TEMaterialPair& lhs,
		const LLMaterialMgr::TEMaterialPair& rhs)
	{
		return (lhs.te	< rhs.te) ? TRUE :
			(lhs.materialID < rhs.materialID);
	}

	struct TEMaterialPairHasher
	{
		enum { bucket_size = 8 };
		size_t operator()(const TEMaterialPair& key_value) const { return *((size_t*)key_value.materialID.get());  } // cheesy, but effective
		bool   operator()(const TEMaterialPair& left, const TEMaterialPair& right) const { return left < right; }
	};

	typedef std::set<LLMaterialID> material_queue_t;
	typedef std::map<LLUUID, material_queue_t> get_queue_t;
	typedef std::pair<const LLUUID, LLMaterialID> pending_material_t;
	typedef std::map<const pending_material_t, F64> get_pending_map_t;
	typedef std::map<LLMaterialID, get_callback_t*> get_callback_map_t;


	typedef boost::unordered_map<TEMaterialPair, get_callback_te_t*, TEMaterialPairHasher> get_callback_te_map_t;
	typedef std::set<LLUUID> getall_queue_t;
	typedef std::map<LLUUID, F64> getall_pending_map_t;
	typedef std::map<LLUUID, getall_callback_t*> getall_callback_map_t;
	typedef std::map<U8, LLMaterial> facematerial_map_t;
	typedef std::map<LLUUID, facematerial_map_t> put_queue_t;


	get_queue_t				mGetQueue;
    uuid_set_t              mRegionGets;
	get_pending_map_t		mGetPending;
	get_callback_map_t		mGetCallbacks;

	get_callback_te_map_t	mGetTECallbacks;
	getall_queue_t			mGetAllQueue;
	getall_queue_t			mGetAllRequested;
	getall_pending_map_t	mGetAllPending;
	getall_callback_map_t	mGetAllCallbacks;
	put_queue_t				mPutQueue;
	material_map_t			mMaterials;

	LLCore::HttpRequest::ptr_t		mHttpRequest;
	LLCore::HttpHeaders::ptr_t		mHttpHeaders;
	LLCore::HttpOptions::ptr_t		mHttpOptions;
	LLCore::HttpRequest::policy_t	mHttpPolicy;

	U32 getMaxEntries(const LLViewerRegion* regionp);
};

#endif // LL_LLMATERIALMGR_H