/** 
 * @file llinventory.h
 * @brief LLInventoryItem and LLInventoryCategory class declaration.
 *
 * $LicenseInfo:firstyear=2001&license=viewergpl$
 * 
 * Copyright (c) 2001-2009, Linden Research, Inc.
 * 
 * Second Life Viewer Source Code
 * The source code in this file ("Source Code") is provided by Linden Lab
 * to you under the terms of the GNU General Public License, version 2.0
 * ("GPL"), unless you have obtained a separate licensing agreement
 * ("Other License"), formally executed by you and Linden Lab.  Terms of
 * the GPL can be found in doc/GPL-license.txt in this distribution, or
 * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
 * 
 * There are special exceptions to the terms and conditions of the GPL as
 * it is applied to this Source Code. View the full text of the exception
 * in the file doc/FLOSS-exception.txt in this software distribution, or
 * online at
 * http://secondlifegrid.net/programs/open_source/licensing/flossexception
 * 
 * By copying, modifying or distributing this software, you acknowledge
 * that you have read and understood your obligations described above,
 * and agree to abide by those obligations.
 * 
 * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
 * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
 * COMPLETENESS OR PERFORMANCE.
 * $/LicenseInfo$
 */

#ifndef LL_LLINVENTORY_H
#define LL_LLINVENTORY_H

#include <functional>

#include "lldarray.h"
#include "llfoldertype.h"
#include "llinventorytype.h"
#include "llmemtype.h"
#include "llpermissions.h"
#include "llrefcount.h"
#include "llsaleinfo.h"
#include "llsd.h"
#include "lluuid.h"

// consts for Key field in the task inventory update message
extern const U8 TASK_INVENTORY_ITEM_KEY;
extern const U8 TASK_INVENTORY_ASSET_KEY;

// anonymous enumeration to specify a max inventory buffer size for
// use in packBinaryBucket()
enum
{
	MAX_INVENTORY_BUFFER_SIZE = 1024
};



//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Class LLInventoryObject
//
// This is the base class for inventory objects that handles the
// common code between items and categories. The 'mParentUUID' member
// means the parent category since all inventory objects except each
// user's root category are in some category. Each user's root
// category will have mParentUUID==LLUUID::null.
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

class LLMessageSystem;

class LLInventoryObject : public LLRefCount
{
protected:
	LLUUID mUUID;
	LLUUID mParentUUID;
	LLAssetType::EType mType;
	std::string mName;

protected:
	virtual ~LLInventoryObject( void );
	
public:
	MEM_TYPE_NEW(LLMemType::MTYPE_INVENTORY);
	LLInventoryObject(const LLUUID& uuid, const LLUUID& parent_uuid,
					  LLAssetType::EType type, const std::string& name);
	LLInventoryObject();
	void copyObject(const LLInventoryObject* other); // LLRefCount requires custom copy

	// accessors
	virtual const LLUUID& getUUID() const;
	const LLUUID& getParentUUID() const;
	virtual const LLUUID& getLinkedUUID() const; // get the inventoryID that this item points to, else this item's inventoryID
	virtual const std::string& getName() const;
	virtual LLAssetType::EType getType() const;
	LLAssetType::EType getActualType() const; // bypasses indirection for linked items
	BOOL getIsLinkType() const;
	// mutators - will not call updateServer();
	void setUUID(const LLUUID& new_uuid);
	virtual void rename(const std::string& new_name);
	void setParent(const LLUUID& new_parent);
	void setType(LLAssetType::EType type);

	// file support - implemented here so that a minimal information
	// set can be transmitted between simulator and viewer.
// 	virtual BOOL importFile(LLFILE* fp);
	virtual BOOL exportFile(LLFILE* fp, BOOL include_asset_key = TRUE) const;

	virtual BOOL importLegacyStream(std::istream& input_stream);
	virtual BOOL exportLegacyStream(std::ostream& output_stream, BOOL include_asset_key = TRUE) const;

	// virtual methods
	virtual void removeFromServer();
	virtual void updateParentOnServer(BOOL) const;
	virtual void updateServer(BOOL) const;
};

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Class LLInventoryItem
//
// An inventory item represents something that the current user has in
// their inventory.
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

class LLInventoryItem : public LLInventoryObject
{
public:
	typedef LLDynamicArray<LLPointer<LLInventoryItem> > item_array_t;
	
protected:
	LLPermissions mPermissions;
	LLUUID mAssetUUID;
	std::string mDescription;
	LLSaleInfo mSaleInfo;
	LLInventoryType::EType mInventoryType;
	U32 mFlags;
	time_t mCreationDate;	// seconds from 1/1/1970, UTC

public:

	/**
	 * Anonymous enumeration for specifying the inventory item flags.
	 */
	enum
	{
		// The shared flags at the top are shared among all inventory
		// types. After that section, all values of flags are type
		// dependent.  The shared flags will start at 2^30 and work
		// down while item type specific flags will start at 2^0 and
		// work up.
		II_FLAGS_NONE = 0,


		//
		// Shared flags
		//
		//

		// This value means that the asset has only one reference in
		// the system. If the inventory item is deleted, or the asset
		// id updated, then we can remove the old reference.
		II_FLAGS_SHARED_SINGLE_REFERENCE = 0x40000000,


		//
		// Landmark flags
		//
		II_FLAGS_LANDMARK_VISITED = 1,

		//
		// Object flags
		//

		// flag to indicate that object permissions should have next
		// owner perm be more restrictive on rez. We bump this into
		// the second byte of the flags since the low byte is used to
		// track attachment points.
		II_FLAGS_OBJECT_SLAM_PERM = 0x100,

		// flag to indicate that the object sale information has been changed.
		II_FLAGS_OBJECT_SLAM_SALE = 0x1000,

		// These flags specify which permissions masks to overwrite
		// upon rez.  Normally, if no permissions slam (above) or
		// overwrite flags are set, the asset's permissions are
		// used and the inventory's permissions are ignored.  If
		// any of these flags are set, the inventory's permissions
		// take precedence.
		II_FLAGS_OBJECT_PERM_OVERWRITE_BASE			= 0x010000,
		II_FLAGS_OBJECT_PERM_OVERWRITE_OWNER		= 0x020000,
		II_FLAGS_OBJECT_PERM_OVERWRITE_GROUP		= 0x040000,
		II_FLAGS_OBJECT_PERM_OVERWRITE_EVERYONE		= 0x080000,
		II_FLAGS_OBJECT_PERM_OVERWRITE_NEXT_OWNER	= 0x100000,

 		// flag to indicate whether an object that is returned is composed 
		// of muiltiple items or not.
		II_FLAGS_OBJECT_HAS_MULTIPLE_ITEMS			= 0x200000,

		//
		// wearables use the low order byte of flags to store the
		// EWearableType enumeration found in newview/llwearable.h
		//
		II_FLAGS_WEARABLES_MASK = 0xff,

		// these bits need to be cleared whenever the asset_id is updated
		// on a pre-existing inventory item (DEV-28098 and DEV-30997)
		II_FLAGS_PERM_OVERWRITE_MASK  =   II_FLAGS_OBJECT_SLAM_PERM 
										| II_FLAGS_OBJECT_SLAM_SALE 
										| II_FLAGS_OBJECT_PERM_OVERWRITE_BASE
										| II_FLAGS_OBJECT_PERM_OVERWRITE_OWNER
										| II_FLAGS_OBJECT_PERM_OVERWRITE_GROUP
										| II_FLAGS_OBJECT_PERM_OVERWRITE_EVERYONE
										| II_FLAGS_OBJECT_PERM_OVERWRITE_NEXT_OWNER,
	};

protected:
	~LLInventoryItem(); // ref counted

public:

	MEM_TYPE_NEW(LLMemType::MTYPE_INVENTORY);
	LLInventoryItem(const LLUUID& uuid,
					const LLUUID& parent_uuid,
					const LLPermissions& permissions,
					const LLUUID& asset_uuid,
					LLAssetType::EType type,
					LLInventoryType::EType inv_type,
					const std::string& name, 
					const std::string& desc,
					const LLSaleInfo& sale_info,
					U32 flags,
					S32 creation_date_utc);
	LLInventoryItem();
	// Create a copy of an inventory item from a pointer to another item
	// Note: Because InventoryItems are ref counted, reference copy (a = b)
	// is prohibited
	LLInventoryItem(const LLInventoryItem* other);
	virtual void copyItem(const LLInventoryItem* other); // LLRefCount requires custom copy

	void generateUUID() { mUUID.generate(); }
	
	// accessors
	virtual const LLUUID& getLinkedUUID() const;
	virtual const LLPermissions& getPermissions() const;
	virtual const LLUUID& getCreatorUUID() const;
	virtual const LLUUID& getAssetUUID() const;
	virtual const std::string& getDescription() const;
	virtual const LLSaleInfo& getSaleInfo() const;
	virtual LLInventoryType::EType getInventoryType() const;
	virtual U32 getFlags() const;
	virtual time_t getCreationDate() const;
	virtual U32 getCRC32() const; // really more of a checksum.
	
	// mutators - will not call updateServer(), and will never fail
	// (though it may correct to sane values)
	void setAssetUUID(const LLUUID& asset_id);
	void setDescription(const std::string& new_desc);
	void setSaleInfo(const LLSaleInfo& sale_info);
	void setPermissions(const LLPermissions& perm);
	void setInventoryType(LLInventoryType::EType inv_type);
	void setFlags(U32 flags);
	void setCreationDate(time_t creation_date_utc);

	// Check for changes in permissions masks and sale info
	// and set the corresponding bits in mFlags
	void accumulatePermissionSlamBits(const LLInventoryItem& old_item);
	
	// This is currently only used in the Viewer to handle calling cards
	// where the creator is actually used to store the target.
	void setCreator(const LLUUID& creator) { mPermissions.setCreator(creator); }

	// Put this inventory item onto the current outgoing mesage. It
	// assumes you have already called nextBlock().
	virtual void packMessage(LLMessageSystem* msg) const;

	// unpack returns TRUE if the inventory item came through the
	// network ok. It uses a simple crc check which is defeatable, but
	// we want to detect network mangling somehow.
	virtual BOOL unpackMessage(LLMessageSystem* msg, const char* block, S32 block_num = 0);
	// file support
	virtual BOOL importFile(LLFILE* fp);
	virtual BOOL exportFile(LLFILE* fp, BOOL include_asset_key = TRUE) const;

	virtual BOOL importLegacyStream(std::istream& input_stream);
	virtual BOOL exportLegacyStream(std::ostream& output_stream, BOOL include_asset_key = TRUE) const;

	// helper functions

	// pack all information needed to reconstruct this item into the given binary bucket.
	// perm_override is optional
	S32 packBinaryBucket(U8* bin_bucket, LLPermissions* perm_override = NULL) const;
	void unpackBinaryBucket(U8* bin_bucket, S32 bin_bucket_size);
	LLSD asLLSD() const;
	void asLLSD( LLSD& sd ) const;
	bool fromLLSD(const LLSD& sd);

};

BOOL item_dictionary_sort(LLInventoryItem* a,LLInventoryItem* b);
BOOL item_date_sort(LLInventoryItem* a, LLInventoryItem* b);


//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Class LLInventoryCategory
//
// An instance of this class represents a category of inventory
// items. Users come with a set of default categories, and can create
// new ones as needed.
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

class LLInventoryCategory : public LLInventoryObject
{
public:
	typedef LLDynamicArray<LLPointer<LLInventoryCategory> > cat_array_t;

protected:
	~LLInventoryCategory();
	
public:
	MEM_TYPE_NEW(LLMemType::MTYPE_INVENTORY);
	LLInventoryCategory(const LLUUID& uuid, const LLUUID& parent_uuid,
						LLFolderType::EType preferred_type,
						const std::string& name);
	LLInventoryCategory();
	LLInventoryCategory(const LLInventoryCategory* other);
	void copyCategory(const LLInventoryCategory* other); // LLRefCount requires custom copy

	// accessors and mutators
	LLFolderType::EType getPreferredType() const;
	void setPreferredType(LLFolderType::EType type);
	// For messaging system support
	virtual void packMessage(LLMessageSystem* msg) const;
	virtual void unpackMessage(LLMessageSystem* msg, const char* block, S32 block_num = 0);

	LLSD asLLSD() const;
	bool fromLLSD(const LLSD& sd);

	// file support
	virtual BOOL importFile(LLFILE* fp);
	virtual BOOL exportFile(LLFILE* fp, BOOL include_asset_key = TRUE) const;

	virtual BOOL importLegacyStream(std::istream& input_stream);
	virtual BOOL exportLegacyStream(std::ostream& output_stream, BOOL include_asset_key = TRUE) const;

protected:
	// May be the type that this category was "meant" to hold (although it may hold any type).	
	LLFolderType::EType	mPreferredType;		
};


//-----------------------------------------------------------------------------
// Useful bits
//-----------------------------------------------------------------------------

typedef std::list<LLPointer<LLInventoryObject> > InventoryObjectList;

// These functions convert between structured data and an inventory
// item, appropriate for serialization.
LLSD ll_create_sd_from_inventory_item(LLPointer<LLInventoryItem> item);
//LLPointer<LLInventoryItem> ll_create_item_from_sd(const LLSD& sd_item);
LLSD ll_create_sd_from_inventory_category(LLPointer<LLInventoryCategory> cat);
LLPointer<LLInventoryCategory> ll_create_category_from_sd(const LLSD& sd_cat);

#endif // LL_LLINVENTORY_H
