/** 
 * @file llinventorymodel.cpp
 * @brief Implementation of the inventory model used to track agent inventory.
 *
 * $LicenseInfo:firstyear=2002&license=viewergpl$
 * 
 * Copyright (c) 2002-2009, 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.
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"
#include "llinventorymodel.h"

#include "llagent.h"
#include "llagentwearables.h"
#include "llinventorypanel.h"
#include "llinventorybridge.h"
#include "llinventoryfunctions.h"
#include "llinventoryobserver.h"
#include "llinventorypanel.h"
#include "llnotificationsutil.h"
#include "llwindow.h"
#include "llviewercontrol.h"
#include "llpreview.h" 
#include "llviewermessage.h"
#include "llviewerfoldertype.h"
#include "llviewerwindow.h"
#include "llappviewer.h"
#include "llviewerregion.h"
#include "llcallbacklist.h"
#include "llvoavatarself.h"

//#define DIFF_INVENTORY_FILES
#ifdef DIFF_INVENTORY_FILES
#include "process.h"
#endif

BOOL LLInventoryModel::sBackgroundFetchActive = FALSE;
BOOL LLInventoryModel::sAllFoldersFetched = FALSE;
BOOL LLInventoryModel::sMyInventoryFetchStarted = FALSE;
BOOL LLInventoryModel::sLibraryFetchStarted = FALSE;
S32  LLInventoryModel::sNumFetchRetries = 0;
F32  LLInventoryModel::sMinTimeBetweenFetches = 0.3f;
F32  LLInventoryModel::sMaxTimeBetweenFetches = 10.f;
BOOL LLInventoryModel::sTimelyFetchPending = FALSE;
LLFrameTimer LLInventoryModel::sFetchTimer;
S16 LLInventoryModel::sBulkFetchCount = 0;
BOOL LLInventoryModel::sFirstTimeInViewer2 = TRUE;

// Increment this if the inventory contents change in a non-backwards-compatible way.
// For viewer 2, the addition of link items makes a pre-viewer-2 cache incorrect.
const S32 LLInventoryModel::sCurrentInvCacheVersion = 2;

// RN: for some reason, using std::queue in the header file confuses the compiler which things it's an xmlrpc_queue
static std::deque<LLUUID> sFetchQueue;

///----------------------------------------------------------------------------
/// Local function declarations, constants, enums, and typedefs
///----------------------------------------------------------------------------

//BOOL decompress_file(const char* src_filename, const char* dst_filename);
const F32 MAX_TIME_FOR_SINGLE_FETCH = 10.f;
const S32 MAX_FETCH_RETRIES = 10;
const char CACHE_FORMAT_STRING[] = "%s.inv"; 

struct InventoryIDPtrLess
{
	bool operator()(const LLViewerInventoryCategory* i1, const LLViewerInventoryCategory* i2) const
	{
		return (i1->getUUID() < i2->getUUID());
	}
};

class LLCanCache : public LLInventoryCollectFunctor 
{
public:
	LLCanCache(LLInventoryModel* model) : mModel(model) {}
	virtual ~LLCanCache() {}
	virtual bool operator()(LLInventoryCategory* cat, LLInventoryItem* item);
protected:
	LLInventoryModel* mModel;
	std::set<LLUUID> mCachedCatIDs;
};

bool LLCanCache::operator()(LLInventoryCategory* cat, LLInventoryItem* item)
{
	bool rv = false;
	if(item)
	{
		if(mCachedCatIDs.find(item->getParentUUID()) != mCachedCatIDs.end())
		{
			rv = true;
		}
	}
	else if(cat)
	{
		// HACK: downcast
		LLViewerInventoryCategory* c = (LLViewerInventoryCategory*)cat;
		if(c->getVersion() != LLViewerInventoryCategory::VERSION_UNKNOWN)
		{
			S32 descendents_server = c->getDescendentCount();
			LLInventoryModel::cat_array_t* cats;
			LLInventoryModel::item_array_t* items;
			mModel->getDirectDescendentsOf(
				c->getUUID(),
				cats,
				items);
			S32 descendents_actual = 0;
			if(cats && items)
			{
				descendents_actual = cats->count() + items->count();
			}
			if(descendents_server == descendents_actual)
			{
				mCachedCatIDs.insert(c->getUUID());
				rv = true;
			}
		}
	}
	return rv;
}

/*
This namespace contains a functionality to remove LM prefixes were used to store sort order of
Favorite Landmarks in landmarks' names.
Once being in Favorites folder LM inventory Item has such prefix.
Due to another solution is implemented in EXT-3985 these prefixes should be removed.

*NOTE: It will be unnecessary after the first successful session in viewer 2.0.
Can be removed before public release.

Implementation details:
At the first run with this patch it patches all cached landmarks: removes LM sort prefixes and
updates them on the viewer and server sides.
Also it calls fetching agent's inventory to process not yet loaded landmarks too.
If fetching is successfully done it will store special per-agent empty file-marker
in the user temporary folder (where cached inventory is loaded) while caching agent's inventory.
After that in will not affect the viewer until cached marker is removed.
*/
namespace LMSortPrefix
{
	bool cleanup_done = false;
	const std::string getMarkerPath()
	{
		std::string path(gDirUtilp->getExpandedFilename(LL_PATH_CACHE, gAgentID.asString()));
		std::string marker_filename = llformat("%s-lm_prefix_marker", path.c_str());

		return marker_filename;
	}
	bool wasClean()
	{
		static bool was_clean = false;
		static bool already_init = false;
		if (already_init) return was_clean;

		already_init = true;
		std::string path_to_marker = getMarkerPath();
		was_clean = LLFile::isfile(path_to_marker);

		return was_clean;
	}

	void setLandmarksWereCleaned()
	{
		if (cleanup_done)
		{
			std::string path_to_marker = getMarkerPath();
			LLFILE* file = LLFile::fopen(path_to_marker, "w");
			if(!file)
			{
				llwarns << "unable to save marker that LM prefixes were removed: " << path_to_marker << llendl;
				return;
			}

			fclose(file);
		}
	}

	void removePrefix(LLPointer<LLViewerInventoryItem> inv_item)
	{
		if (wasClean())
		{
			LL_INFOS_ONCE("") << "Inventory was cleaned for this avatar. Patch can be removed." << LL_ENDL;
			return;
		}

		if (LLInventoryType::IT_LANDMARK != inv_item->getInventoryType()) return;

		std::string old_name = inv_item->getName();

		S32 sort_field = -1;
		std::string display_name;
		BOOL exists = LLViewerInventoryItem::extractSortFieldAndDisplayName(old_name, &sort_field, &display_name);
		if (exists && sort_field != -1)
		{
			llinfos << "Removing Landmark sort field and separator for: " << old_name << " | " << inv_item->getUUID() << llendl;
			LLUUID parent_uuid = inv_item->getParentUUID();
			if (gInventory.getCategory(parent_uuid))
			{
				llinfos << "parent folder is: " << gInventory.getCategory(parent_uuid)->getName() << llendl;
			}


			// mark item completed to avoid error while copying and updating server
			inv_item->setComplete(TRUE);
			LLPointer<LLViewerInventoryItem> new_item = new LLViewerInventoryItem(inv_item);
			new_item->rename(display_name);
			gInventory.updateItem(new_item);
			new_item->updateServer(FALSE);

			gInventory.notifyObservers();
		}
	}

	void completeCleanup()
	{
		// background fetch is completed. can save marker
		cleanup_done = true;
	}
}

///----------------------------------------------------------------------------
/// Class LLInventoryModel
///----------------------------------------------------------------------------

// global for the agent inventory.
LLInventoryModel gInventory;

// Default constructor
LLInventoryModel::LLInventoryModel()
:	mModifyMask(LLInventoryObserver::ALL),
	mChangedItemIDs(),
	mCategoryMap(),
	mItemMap(),
	mCategoryLock(),
	mItemLock(),
	mLastItem(NULL),
	mParentChildCategoryTree(),
	mParentChildItemTree(),
	mObservers(),
	mRootFolderID(),
	mLibraryRootFolderID(),
	mLibraryOwnerID(),
	mIsNotifyObservers(FALSE),
	mIsAgentInvUsable(false)
{
}

// Destroys the object
LLInventoryModel::~LLInventoryModel()
{
	cleanupInventory();
}

void LLInventoryModel::cleanupInventory()
{
	empty();
	// Deleting one observer might erase others from the list, so always pop off the front
	while (!mObservers.empty())
	{
		observer_list_t::iterator iter = mObservers.begin();
		LLInventoryObserver* observer = *iter;
		mObservers.erase(iter);
		delete observer;
	}
	mObservers.clear();
}

// This is a convenience function to check if one object has a parent
// chain up to the category specified by UUID.
BOOL LLInventoryModel::isObjectDescendentOf(const LLUUID& obj_id,
											const LLUUID& cat_id) const
{
	if (obj_id == cat_id) return TRUE;

	const LLInventoryObject* obj = getObject(obj_id);
	while(obj)
	{
		const LLUUID& parent_id = obj->getParentUUID();
		if( parent_id.isNull() )
		{
			return FALSE;
		}
		if(parent_id == cat_id)
		{
			return TRUE;
		}
		// Since we're scanning up the parents, we only need to check
		// in the category list.
		obj = getCategory(parent_id);
	}
	return FALSE;
}

const LLViewerInventoryCategory *LLInventoryModel::getFirstNondefaultParent(const LLUUID& obj_id) const
{
	const LLInventoryObject* obj = getObject(obj_id);
	const LLUUID& parent_id = obj->getParentUUID();
	while (!parent_id.isNull())
	{
		const LLViewerInventoryCategory *cat = getCategory(parent_id);
		if (!cat) break;
		const LLFolderType::EType folder_type = cat->getPreferredType();
		if (folder_type != LLFolderType::FT_NONE &&
			folder_type != LLFolderType::FT_ROOT_INVENTORY &&
			!LLFolderType::lookupIsEnsembleType(folder_type))
		{
			return cat;
		}
	}
	return NULL;
}

// Get the object by id. Returns NULL if not found.
LLInventoryObject* LLInventoryModel::getObject(const LLUUID& id) const
{
	LLViewerInventoryCategory* cat = getCategory(id);
	if (cat)
	{
		return cat;
	}
	LLViewerInventoryItem* item = getItem(id);
	if (item)
	{
		return item;
	}
	return NULL;
}

// Get the item by id. Returns NULL if not found.
LLViewerInventoryItem* LLInventoryModel::getItem(const LLUUID& id) const
{
	LLViewerInventoryItem* item = NULL;
	if(mLastItem.notNull() && mLastItem->getUUID() == id)
	{
		item = mLastItem;
	}
	else
	{
		item_map_t::const_iterator iter = mItemMap.find(id);
		if (iter != mItemMap.end())
		{
			item = iter->second;
			mLastItem = item;
		}
	}
	return item;
}

// Get the category by id. Returns NULL if not found
LLViewerInventoryCategory* LLInventoryModel::getCategory(const LLUUID& id) const
{
	LLViewerInventoryCategory* category = NULL;
	cat_map_t::const_iterator iter = mCategoryMap.find(id);
	if (iter != mCategoryMap.end())
	{
		category = iter->second;
	}
	return category;
}

S32 LLInventoryModel::getItemCount() const
{
	return mItemMap.size();
}

S32 LLInventoryModel::getCategoryCount() const
{
	return mCategoryMap.size();
}

// Return the direct descendents of the id provided. The array
// provided points straight into the guts of this object, and
// should only be used for read operations, since modifications
// may invalidate the internal state of the inventory. Set passed
// in values to NULL if the call fails.
void LLInventoryModel::getDirectDescendentsOf(const LLUUID& cat_id,
											  cat_array_t*& categories,
											  item_array_t*& items) const
{
	categories = get_ptr_in_map(mParentChildCategoryTree, cat_id);
	items = get_ptr_in_map(mParentChildItemTree, cat_id);
}

// SJB: Added version to lock the arrays to catch potential logic bugs
void LLInventoryModel::lockDirectDescendentArrays(const LLUUID& cat_id,
												  cat_array_t*& categories,
												  item_array_t*& items)
{
	getDirectDescendentsOf(cat_id, categories, items);
	if (categories)
	{
		mCategoryLock[cat_id] = true;
	}
	if (items)
	{
		mItemLock[cat_id] = true;
	}
}

void LLInventoryModel::unlockDirectDescendentArrays(const LLUUID& cat_id)
{
	mCategoryLock[cat_id] = false;
	mItemLock[cat_id] = false;
}

// findCategoryUUIDForType() returns the uuid of the category that
// specifies 'type' as what it defaults to containing. The category is
// not necessarily only for that type. *NOTE: This will create a new
// inventory category on the fly if one does not exist.
const LLUUID LLInventoryModel::findCategoryUUIDForType(LLFolderType::EType t, bool create_folder, bool find_in_library)
{
	const LLUUID &rv = findCatUUID(t, find_in_library);
	if(rv.isNull() && isInventoryUsable() && (create_folder && !find_in_library))
	{
		const LLUUID &root_id = gInventory.getRootFolderID();
		if(root_id.notNull())
		{
			return createNewCategory(root_id, t, LLStringUtil::null);
		}
	}
	return rv;
}

// Internal method which looks for a category with the specified
// preferred type. Returns LLUUID::null if not found.
const LLUUID &LLInventoryModel::findCatUUID(LLFolderType::EType preferred_type, bool find_in_library) const
{
	const LLUUID &root_id = (find_in_library) ? gInventory.getLibraryRootFolderID() : gInventory.getRootFolderID();
	if(LLFolderType::FT_ROOT_INVENTORY == preferred_type)
	{
		return root_id;
	}
	if(root_id.notNull())
	{
		cat_array_t* cats = NULL;
		cats = get_ptr_in_map(mParentChildCategoryTree, root_id);
		if(cats)
		{
			S32 count = cats->count();
			for(S32 i = 0; i < count; ++i)
			{
				if(cats->get(i)->getPreferredType() == preferred_type)
				{
					return cats->get(i)->getUUID();
				}
			}
		}
	}
	return LLUUID::null;
}

// Convenience function to create a new category. You could call
// updateCategory() with a newly generated UUID category, but this
// version will take care of details like what the name should be
// based on preferred type. Returns the UUID of the new category.
LLUUID LLInventoryModel::createNewCategory(const LLUUID& parent_id,
										   LLFolderType::EType preferred_type,
										   const std::string& pname)
{
	LLUUID id;
	if(!isInventoryUsable())
	{
		llwarns << "Inventory is broken." << llendl;
		return id;
	}

	if(LLFolderType::lookup(preferred_type) == LLFolderType::badLookup())
	{
		lldebugs << "Attempt to create undefined category." << llendl;
		return id;
	}

	id.generate();
	std::string name = pname;
	if(!pname.empty())
	{
		name.assign(pname);
	}
	else
	{
		name.assign(LLViewerFolderType::lookupNewCategoryName(preferred_type));
	}

	// Add the category to the internal representation
	LLPointer<LLViewerInventoryCategory> cat =
		new LLViewerInventoryCategory(id, parent_id, preferred_type, name, gAgent.getID());
	cat->setVersion(LLViewerInventoryCategory::VERSION_INITIAL);
	cat->setDescendentCount(0);
	LLCategoryUpdate update(cat->getParentUUID(), 1);
	accountForUpdate(update);
	updateCategory(cat);

	// Create the category on the server. We do this to prevent people
	// from munging their protected folders.
	LLMessageSystem* msg = gMessageSystem;
	msg->newMessage("CreateInventoryFolder");
	msg->nextBlock("AgentData");
	msg->addUUID("AgentID", gAgent.getID());
	msg->addUUID(_PREHASH_SessionID, gAgent.getSessionID());
	msg->nextBlock("FolderData");
	cat->packMessage(msg);
	gAgent.sendReliableMessage();

	// return the folder id of the newly created folder
	return id;
}

// Starting with the object specified, add it's descendents to the
// array provided, but do not add the inventory object specified by
// id. There is no guaranteed order. Neither array will be erased
// before adding objects to it. Do not store a copy of the pointers
// collected - use them, and collect them again later if you need to
// reference the same objects.

class LLAlwaysCollect : public LLInventoryCollectFunctor
{
public:
	virtual ~LLAlwaysCollect() {}
	virtual bool operator()(LLInventoryCategory* cat,
							LLInventoryItem* item)
	{
		return TRUE;
	}
};

void LLInventoryModel::collectDescendents(const LLUUID& id,
										  cat_array_t& cats,
										  item_array_t& items,
										  BOOL include_trash)
{
	LLAlwaysCollect always;
	collectDescendentsIf(id, cats, items, include_trash, always);
}

void LLInventoryModel::collectDescendentsIf(const LLUUID& id,
											cat_array_t& cats,
											item_array_t& items,
											BOOL include_trash,
											LLInventoryCollectFunctor& add,
											BOOL follow_folder_links)
{
	// Start with categories
	if(!include_trash)
	{
		const LLUUID trash_id = findCategoryUUIDForType(LLFolderType::FT_TRASH);
		if(trash_id.notNull() && (trash_id == id))
			return;
	}
	cat_array_t* cat_array = get_ptr_in_map(mParentChildCategoryTree, id);
	if(cat_array)
	{
		S32 count = cat_array->count();
		for(S32 i = 0; i < count; ++i)
		{
			LLViewerInventoryCategory* cat = cat_array->get(i);
			if(add(cat,NULL))
			{
				cats.put(cat);
			}
			collectDescendentsIf(cat->getUUID(), cats, items, include_trash, add);
		}
	}

	LLViewerInventoryItem* item = NULL;
	item_array_t* item_array = get_ptr_in_map(mParentChildItemTree, id);

	// Follow folder links recursively.  Currently never goes more
	// than one level deep (for current outfit support)
	// Note: if making it fully recursive, need more checking against infinite loops.
	if (follow_folder_links && item_array)
	{
		S32 count = item_array->count();
		for(S32 i = 0; i < count; ++i)
		{
			item = item_array->get(i);
			if (item->getActualType() == LLAssetType::AT_LINK_FOLDER)
			{
				LLViewerInventoryCategory *linked_cat = item->getLinkedCategory();
				if (linked_cat && linked_cat->getPreferredType() != LLFolderType::FT_OUTFIT)
					// BAP - was 
					// LLAssetType::lookupIsEnsembleCategoryType(linked_cat->getPreferredType()))
					// Change back once ensemble typing is in place.
				{
					if(add(linked_cat,NULL))
					{
						// BAP should this be added here?  May not
						// matter if it's only being used in current
						// outfit traversal.
						cats.put(LLPointer<LLViewerInventoryCategory>(linked_cat));
					}
					collectDescendentsIf(linked_cat->getUUID(), cats, items, include_trash, add, FALSE);
				}
			}
		}
	}
	
	// Move onto items
	if(item_array)
	{
		S32 count = item_array->count();
		for(S32 i = 0; i < count; ++i)
		{
			item = item_array->get(i);
			if(add(NULL, item))
			{
				items.put(item);
			}
		}
	}
}

void LLInventoryModel::addChangedMaskForLinks(const LLUUID& object_id, U32 mask)
{
	const LLInventoryObject *obj = getObject(object_id);
	if (!obj || obj->getIsLinkType())
		return;

	LLInventoryModel::cat_array_t cat_array;
	LLInventoryModel::item_array_t item_array;
	LLLinkedItemIDMatches is_linked_item_match(object_id);
	collectDescendentsIf(gInventory.getRootFolderID(),
						 cat_array,
						 item_array,
						 LLInventoryModel::INCLUDE_TRASH,
						 is_linked_item_match);
	if (cat_array.empty() && item_array.empty())
	{
		return;
	}
	for (LLInventoryModel::cat_array_t::iterator cat_iter = cat_array.begin();
		 cat_iter != cat_array.end();
		 cat_iter++)
	{
		LLViewerInventoryCategory *linked_cat = (*cat_iter);
		addChangedMask(mask, linked_cat->getUUID());
	};

	for (LLInventoryModel::item_array_t::iterator iter = item_array.begin();
		 iter != item_array.end();
		 iter++)
	{
		LLViewerInventoryItem *linked_item = (*iter);
		addChangedMask(mask, linked_item->getUUID());
	};
}

const LLUUID& LLInventoryModel::getLinkedItemID(const LLUUID& object_id) const
{
	const LLInventoryItem *item = gInventory.getItem(object_id);
	if (!item)
	{
		return object_id;
	}

	// Find the base item in case this a link (if it's not a link,
	// this will just be inv_item_id)
	return item->getLinkedUUID();
}

LLInventoryModel::item_array_t LLInventoryModel::collectLinkedItems(const LLUUID& id,
																	const LLUUID& start_folder_id)
{
	item_array_t items;
	LLInventoryModel::cat_array_t cat_array;
	LLLinkedItemIDMatches is_linked_item_match(id);
	collectDescendentsIf((start_folder_id == LLUUID::null ? gInventory.getRootFolderID() : start_folder_id),
						 cat_array,
						 items,
						 LLInventoryModel::INCLUDE_TRASH,
						 is_linked_item_match);
	return items;
}

// Generates a string containing the path to the item specified by
// item_id.
void LLInventoryModel::appendPath(const LLUUID& id, std::string& path) const
{
	std::string temp;
	const LLInventoryObject* obj = getObject(id);
	LLUUID parent_id;
	if(obj) parent_id = obj->getParentUUID();
	std::string forward_slash("/");
	while(obj)
	{
		obj = getCategory(parent_id);
		if(obj)
		{
			temp.assign(forward_slash + obj->getName() + temp);
			parent_id = obj->getParentUUID();
		}
	}
	path.append(temp);
}

bool LLInventoryModel::isInventoryUsable() const
{
	bool result = false;
	if(gInventory.getRootFolderID().notNull() && mIsAgentInvUsable)
	{
		result = true;
	}
	return result;	
}

// Calling this method with an inventory item will either change an
// existing item with a matching item_id, or will add the item to the
// current inventory.
U32 LLInventoryModel::updateItem(const LLViewerInventoryItem* item)
{
	U32 mask = LLInventoryObserver::NONE;
	if(item->getUUID().isNull())
	{
		return mask;
	}

	if(!isInventoryUsable())
	{
		llwarns << "Inventory is broken." << llendl;
		return mask;
	}

	LLViewerInventoryItem* old_item = getItem(item->getUUID());
	LLPointer<LLViewerInventoryItem> new_item;
	if(old_item)
	{
		// We already have an old item, modify its values
		new_item = old_item;
		LLUUID old_parent_id = old_item->getParentUUID();
		LLUUID new_parent_id = item->getParentUUID();
			
		if(old_parent_id != new_parent_id)
		{
			// need to update the parent-child tree
			item_array_t* item_array;
			item_array = get_ptr_in_map(mParentChildItemTree, old_parent_id);
			if(item_array)
			{
				item_array->removeObj(old_item);
			}
			item_array = get_ptr_in_map(mParentChildItemTree, new_parent_id);
			if(item_array)
			{
				item_array->put(old_item);
			}
			mask |= LLInventoryObserver::STRUCTURE;
		}
		if(old_item->getName() != item->getName())
		{
			mask |= LLInventoryObserver::LABEL;
		}
		old_item->copyViewerItem(item);
		mask |= LLInventoryObserver::INTERNAL;
	}
	else
	{
		// Simply add this item
		new_item = new LLViewerInventoryItem(item);
		addItem(new_item);

		if(item->getParentUUID().isNull())
		{
			const LLUUID category_id = findCategoryUUIDForType(LLFolderType::assetTypeToFolderType(new_item->getType()));
			new_item->setParent(category_id);
			item_array_t* item_array = get_ptr_in_map(mParentChildItemTree, category_id);
			if( item_array )
			{
				// *FIX: bit of a hack to call update server from here...
				new_item->updateServer(TRUE);
				item_array->put(new_item);
			}
			else
			{
				llwarns << "Couldn't find parent-child item tree for " << new_item->getName() << llendl;
			}
		}
		else
		{
			// *NOTE: The general scheme is that if every byte of the
			// uuid is 0, except for the last one or two,the use the
			// last two bytes of the parent id, and match that up
			// against the type. For now, we're only worried about
			// lost & found.
			LLUUID parent_id = item->getParentUUID();
			if(parent_id == CATEGORIZE_LOST_AND_FOUND_ID)
			{
				parent_id = findCategoryUUIDForType(LLFolderType::FT_LOST_AND_FOUND);
				new_item->setParent(parent_id);
			}
			item_array_t* item_array = get_ptr_in_map(mParentChildItemTree, parent_id);
			if(item_array)
			{
				item_array->put(new_item);
			}
			else
			{
				// Whoops! No such parent, make one.
				llinfos << "Lost item: " << new_item->getUUID() << " - "
						<< new_item->getName() << llendl;
				parent_id = findCategoryUUIDForType(LLFolderType::FT_LOST_AND_FOUND);
				new_item->setParent(parent_id);
				item_array = get_ptr_in_map(mParentChildItemTree, parent_id);
				if(item_array)
				{
					// *FIX: bit of a hack to call update server from
					// here...
					new_item->updateServer(TRUE);
					item_array->put(new_item);
				}
				else
				{
					llwarns << "Lost and found Not there!!" << llendl;
				}
			}
		}
		mask |= LLInventoryObserver::ADD;
	}
	if(new_item->getType() == LLAssetType::AT_CALLINGCARD)
	{
		mask |= LLInventoryObserver::CALLING_CARD;
		// Handle user created calling cards.
		// Target ID is stored in the description field of the card.
		LLUUID id;
		std::string desc = new_item->getDescription();
		BOOL isId = desc.empty() ? FALSE : id.set(desc, FALSE);
		if (isId)
		{
			// Valid UUID; set the item UUID and rename it
			new_item->setCreator(id);
			std::string avatar_name;
			// Fetch the currect name
			gCacheName->get(id, FALSE, boost::bind(&LLViewerInventoryItem::onCallingCardNameLookup, new_item.get(), _1, _2, _3));
		}
	}
	else if (new_item->getType() == LLAssetType::AT_GESTURE)
	{
		mask |= LLInventoryObserver::GESTURE;
	}
	addChangedMask(mask, new_item->getUUID());
	return mask;
}

LLInventoryModel::cat_array_t* LLInventoryModel::getUnlockedCatArray(const LLUUID& id)
{
	cat_array_t* cat_array = get_ptr_in_map(mParentChildCategoryTree, id);
	if (cat_array)
	{
		llassert_always(mCategoryLock[id] == false);
	}
	return cat_array;
}

LLInventoryModel::item_array_t* LLInventoryModel::getUnlockedItemArray(const LLUUID& id)
{
	item_array_t* item_array = get_ptr_in_map(mParentChildItemTree, id);
	if (item_array)
	{
		llassert_always(mItemLock[id] == false);
	}
	return item_array;
}

// Calling this method with an inventory category will either change
// an existing item with the matching id, or it will add the category.
void LLInventoryModel::updateCategory(const LLViewerInventoryCategory* cat)
{
	if(cat->getUUID().isNull())
	{
		return;
	}

	if(!isInventoryUsable())
	{
		llwarns << "Inventory is broken." << llendl;
		return;
	}

	LLViewerInventoryCategory* old_cat = getCategory(cat->getUUID());
	if(old_cat)
	{
		// We already have an old category, modify it's values
		U32 mask = LLInventoryObserver::NONE;
		LLUUID old_parent_id = old_cat->getParentUUID();
		LLUUID new_parent_id = cat->getParentUUID();
		if(old_parent_id != new_parent_id)
		{
			// need to update the parent-child tree
			cat_array_t* cat_array;
			cat_array = getUnlockedCatArray(old_parent_id);
			if(cat_array)
			{
				cat_array->removeObj(old_cat);
			}
			cat_array = getUnlockedCatArray(new_parent_id);
			if(cat_array)
			{
				cat_array->put(old_cat);
			}
			mask |= LLInventoryObserver::STRUCTURE;
		}
		if(old_cat->getName() != cat->getName())
		{
			mask |= LLInventoryObserver::LABEL;
		}
		old_cat->copyViewerCategory(cat);
		addChangedMask(mask, cat->getUUID());
	}
	else
	{
		// add this category
		LLPointer<LLViewerInventoryCategory> new_cat = new LLViewerInventoryCategory(cat->getParentUUID());
		new_cat->copyViewerCategory(cat);
		addCategory(new_cat);

		// make sure this category is correctly referenced by it's parent.
		cat_array_t* cat_array;
		cat_array = getUnlockedCatArray(cat->getParentUUID());
		if(cat_array)
		{
			cat_array->put(new_cat);
		}

		// make space in the tree for this category's children.
		llassert_always(mCategoryLock[new_cat->getUUID()] == false);
		llassert_always(mItemLock[new_cat->getUUID()] == false);
		cat_array_t* catsp = new cat_array_t;
		item_array_t* itemsp = new item_array_t;
		mParentChildCategoryTree[new_cat->getUUID()] = catsp;
		mParentChildItemTree[new_cat->getUUID()] = itemsp;
		addChangedMask(LLInventoryObserver::ADD, cat->getUUID());
	}
}

void LLInventoryModel::moveObject(const LLUUID& object_id, const LLUUID& cat_id)
{
	lldebugs << "LLInventoryModel::moveObject()" << llendl;
	if(!isInventoryUsable())
	{
		llwarns << "Inventory is broken." << llendl;
		return;
	}

	if((object_id == cat_id) || !is_in_map(mCategoryMap, cat_id))
	{
		llwarns << "Could not move inventory object " << object_id << " to "
				<< cat_id << llendl;
		return;
	}
	LLViewerInventoryCategory* cat = getCategory(object_id);
	if(cat && (cat->getParentUUID() != cat_id))
	{
		cat_array_t* cat_array;
		cat_array = getUnlockedCatArray(cat->getParentUUID());
		if(cat_array) cat_array->removeObj(cat);
		cat_array = getUnlockedCatArray(cat_id);
		cat->setParent(cat_id);
		if(cat_array) cat_array->put(cat);
		addChangedMask(LLInventoryObserver::STRUCTURE, object_id);
		return;
	}
	LLViewerInventoryItem* item = getItem(object_id);
	if(item && (item->getParentUUID() != cat_id))
	{
		item_array_t* item_array;
		item_array = getUnlockedItemArray(item->getParentUUID());
		if(item_array) item_array->removeObj(item);
		item_array = getUnlockedItemArray(cat_id);
		item->setParent(cat_id);
		if(item_array) item_array->put(item);
		addChangedMask(LLInventoryObserver::STRUCTURE, object_id);
		return;
	}
}

// Delete a particular inventory object by ID.
void LLInventoryModel::deleteObject(const LLUUID& id)
{
	lldebugs << "LLInventoryModel::deleteObject()" << llendl;
	LLPointer<LLInventoryObject> obj = getObject(id);
	if (!obj) 
	{
		llwarns << "Deleting non-existent object [ id: " << id << " ] " << llendl;
		return;
	}
	
	lldebugs << "Deleting inventory object " << id << llendl;
	mLastItem = NULL;
	LLUUID parent_id = obj->getParentUUID();
	mCategoryMap.erase(id);
	mItemMap.erase(id);
	//mInventory.erase(id);
	item_array_t* item_list = getUnlockedItemArray(parent_id);
	if(item_list)
	{
		LLViewerInventoryItem* item = (LLViewerInventoryItem*)((LLInventoryObject*)obj);
		item_list->removeObj(item);
	}
	cat_array_t* cat_list = getUnlockedCatArray(parent_id);
	if(cat_list)
	{
		LLViewerInventoryCategory* cat = (LLViewerInventoryCategory*)((LLInventoryObject*)obj);
		cat_list->removeObj(cat);
	}
	item_list = getUnlockedItemArray(id);
	if(item_list)
	{
		delete item_list;
		mParentChildItemTree.erase(id);
	}
	cat_list = getUnlockedCatArray(id);
	if(cat_list)
	{
		delete cat_list;
		mParentChildCategoryTree.erase(id);
	}
	addChangedMask(LLInventoryObserver::REMOVE, id);
	obj = NULL; // delete obj
	updateLinkedObjectsFromPurge(id);
	gInventory.notifyObservers();
}

// Delete a particular inventory item by ID, and remove it from the server.
void LLInventoryModel::purgeObject(const LLUUID &id)
{
	lldebugs << "LLInventoryModel::purgeObject() [ id: " << id << " ] " << llendl;
	LLPointer<LLInventoryObject> obj = getObject(id);
	if(obj)
	{
		obj->removeFromServer();
		LLPreview::hide(id);
		deleteObject(id);
	}
}

void LLInventoryModel::updateLinkedObjectsFromPurge(const LLUUID &baseobj_id)
{
	LLInventoryModel::item_array_t item_array = collectLinkedItems(baseobj_id);

	// REBUILD is expensive, so clear the current change list first else
	// everything else on the changelist will also get rebuilt.
	gInventory.notifyObservers();
	for (LLInventoryModel::item_array_t::const_iterator iter = item_array.begin();
		 iter != item_array.end();
		 iter++)
	{
		const LLViewerInventoryItem *linked_item = (*iter);
		const LLUUID &item_id = linked_item->getUUID();
		if (item_id == baseobj_id) continue;
		addChangedMask(LLInventoryObserver::REBUILD, item_id);
	}
	gInventory.notifyObservers();
}

// This is a method which collects the descendents of the id
// provided. If the category is not found, no action is
// taken. This method goes through the long winded process of
// cancelling any calling cards, removing server representation of
// folders, items, etc in a fairly efficient manner.
void LLInventoryModel::purgeDescendentsOf(const LLUUID& id)
{
	EHasChildren children = categoryHasChildren(id);
	if(children == CHILDREN_NO)
	{
		llinfos << "Not purging descendents of " << id << llendl;
		return;
	}
	LLPointer<LLViewerInventoryCategory> cat = getCategory(id);
	if(cat.notNull())
	{
		// do the cache accounting
		llinfos << "LLInventoryModel::purgeDescendentsOf " << cat->getName()
				<< llendl;
		S32 descendents = cat->getDescendentCount();
		if(descendents > 0)
		{
			LLCategoryUpdate up(id, -descendents);
			accountForUpdate(up);
		}

		// we know that descendent count is 0, aide since the
		// accounting may actually not do an update, we should force
		// it here.
		cat->setDescendentCount(0);

		// send it upstream
		LLMessageSystem* msg = gMessageSystem;
		msg->newMessage("PurgeInventoryDescendents");
		msg->nextBlock("AgentData");
		msg->addUUID("AgentID", gAgent.getID());
		msg->addUUID("SessionID", gAgent.getSessionID());
		msg->nextBlock("InventoryData");
		msg->addUUID("FolderID", id);
		gAgent.sendReliableMessage();

		// unceremoniously remove anything we have locally stored.
		cat_array_t categories;
		item_array_t items;
		collectDescendents(id,
						   categories,
						   items,
						   INCLUDE_TRASH);
		S32 count = items.count();
		S32 i;
		for(i = 0; i < count; ++i)
		{
			deleteObject(items.get(i)->getUUID());
		}
		count = categories.count();
		for(i = 0; i < count; ++i)
		{
			deleteObject(categories.get(i)->getUUID());
		}
	}
}

void LLInventoryModel::deleteFromServer(LLDynamicArray<LLUUID>& category_ids,
										LLDynamicArray<LLUUID>& item_ids)
{
	// Store off tre UUIDS of parents which are being deleted (thus no
	// need to increment) and the parents which are being modified. We
	// have to increment the version of the parent with each message
	// sent upstream since the dataserver will increment each unique
	// parent per update message.
	std::set<LLUUID> ignore_parents;
	update_map_t inc_parents;

	S32 i;
	S32 count = category_ids.count();
	BOOL start_new_message = TRUE;
	LLMessageSystem* msg = gMessageSystem;
	LLPointer<LLViewerInventoryCategory> cat;
	for(i = 0; i < count; i++)
	{
		if(start_new_message)
		{
			start_new_message = FALSE;
			msg->newMessageFast(_PREHASH_RemoveInventoryObjects);
			msg->nextBlockFast(_PREHASH_AgentData);
			msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID());
			msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID());
		}
		LLUUID cat_id = category_ids.get(i);

		msg->nextBlockFast(_PREHASH_FolderData);
		msg->addUUIDFast(_PREHASH_FolderID, cat_id);
		cat = getCategory(cat_id);
		ignore_parents.insert(cat_id);
		addChangedMask(LLInventoryObserver::REMOVE | LLInventoryObserver::STRUCTURE, cat_id);
		if(cat.notNull() && (ignore_parents.find(cat->getParentUUID())==ignore_parents.end()))
		{
			--inc_parents[cat->getParentUUID()];
		}
		if(msg->isSendFullFast(_PREHASH_FolderData))
		{
			start_new_message = TRUE;
			msg->nextBlockFast(_PREHASH_ItemData);
			msg->addUUIDFast(_PREHASH_ItemID, LLUUID::null);
			gAgent.sendReliableMessage();
			accountForUpdate(inc_parents);
			inc_parents.clear();
		}
	}

	count = item_ids.count();
	std::set<LLUUID>::iterator not_ignored = ignore_parents.end();
	LLPointer<LLViewerInventoryItem> item;
	if((0 == count) && (!start_new_message))
	{
		msg->nextBlockFast(_PREHASH_ItemData);
		msg->addUUIDFast(_PREHASH_ItemID, LLUUID::null);
	}
	for(i = 0; i < count; i++)
	{
		if(start_new_message)
		{
			start_new_message = FALSE;
			msg->newMessageFast(_PREHASH_RemoveInventoryObjects);
			msg->nextBlockFast(_PREHASH_AgentData);
			msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID());
			msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID());
			msg->nextBlockFast(_PREHASH_FolderData);
			msg->addUUIDFast(_PREHASH_FolderID, LLUUID::null);
		}
		LLUUID item_id = item_ids.get(i);
		msg->nextBlockFast(_PREHASH_ItemData);
		msg->addUUIDFast(_PREHASH_ItemID, item_id);
		item = getItem(item_id);
		addChangedMask(LLInventoryObserver::REMOVE | LLInventoryObserver::STRUCTURE, item_id);
		if(item.notNull() && (ignore_parents.find(item->getParentUUID()) == not_ignored))
		{
			--inc_parents[item->getParentUUID()];
		}
		if(msg->isSendFullFast(_PREHASH_ItemData))
		{
			start_new_message = TRUE;
			gAgent.sendReliableMessage();
			accountForUpdate(inc_parents);
			inc_parents.clear();
		}
	}
	if(!start_new_message)
	{
		gAgent.sendReliableMessage();
		accountForUpdate(inc_parents);
	}
}

// Add/remove an observer. If the observer is destroyed, be sure to
// remove it.
void LLInventoryModel::addObserver(LLInventoryObserver* observer)
{
	mObservers.insert(observer);
}
	
void LLInventoryModel::removeObserver(LLInventoryObserver* observer)
{
	mObservers.erase(observer);
}

BOOL LLInventoryModel::containsObserver(LLInventoryObserver* observer) const
{
	return mObservers.find(observer) != mObservers.end();
}

void LLInventoryModel::idleNotifyObservers()
{
	if (mModifyMask == LLInventoryObserver::NONE && (mChangedItemIDs.size() == 0))
	{
		return;
	}
	notifyObservers("");
}

// Call this method when it's time to update everyone on a new state.
// The optional argument 'service_name' is used by Agent Inventory Service [DEV-20328]
void LLInventoryModel::notifyObservers(const std::string service_name)
{
	if (mIsNotifyObservers)
	{
		// Within notifyObservers, something called notifyObservers
		// again.  This type of recursion is unsafe because it causes items to be 
		// processed twice, and this can easily lead to infinite loops.
		llwarns << "Call was made to notifyObservers within notifyObservers!" << llendl;
		return;
	}

	mIsNotifyObservers = TRUE;
	for (observer_list_t::iterator iter = mObservers.begin();
		 iter != mObservers.end(); )
	{
		LLInventoryObserver* observer = *iter;
		
		if (service_name.empty())
		{
			observer->changed(mModifyMask);
		}
		else
		{
			observer->mMessageName = service_name;
			observer->changed(mModifyMask);
		}

		// safe way to increment since changed may delete entries! (@!##%@!@&*!)
		iter = mObservers.upper_bound(observer); 
	}

	mModifyMask = LLInventoryObserver::NONE;
	mChangedItemIDs.clear();
	mIsNotifyObservers = FALSE;
}

// store flag for change
// and id of object change applies to
void LLInventoryModel::addChangedMask(U32 mask, const LLUUID& referent) 
{ 
	if (mIsNotifyObservers)
	{
		// Something marked an item for change within a call to notifyObservers
		// (which is in the process of processing the list of items marked for change).
		// This means the change may fail to be processed.
		llwarns << "Adding changed mask within notify observers!  Change will likely be lost." << llendl;
	}
	
	mModifyMask |= mask; 
	if (referent.notNull())
	{
		mChangedItemIDs.insert(referent);
	}
	
	// Update all linked items.  Starting with just LABEL because I'm
	// not sure what else might need to be accounted for this.
	if (mModifyMask & LLInventoryObserver::LABEL)
	{
		addChangedMaskForLinks(referent, LLInventoryObserver::LABEL);
	}
}

// This method to prepares a set of mock inventory which provides
// minimal functionality before the actual arrival of inventory.
/*
void LLInventoryModel::mock(const LLUUID& root_id)
{
	llinfos << "LLInventoryModel::mock() " << root_id << llendl;
	if(root_id.isNull())
	{
		llwarns << "Not a valid root id" << llendl;
		return;
	}
	LLPointer<LLViewerInventoryCategory> cat = new LLViewerInventoryCategory(
		root_id,
		LLUUID::null,
		LLAssetType::AT_CATEGORY,
		LLFolderType::lookupNewCategoryName(LLFolderType::FT_ROOT_INVENTORY),
		gAgent.getID());
	addCategory(cat);
	gInventory.buildParentChildMap();
}
*/

//If we get back a normal response, handle it here
void  LLInventoryModel::fetchInventoryResponder::result(const LLSD& content)
{	
	start_new_inventory_observer();

	/*LLUUID agent_id;
	agent_id = content["agent_id"].asUUID();
	if(agent_id != gAgent.getID())
	{
		llwarns << "Got a inventory update for the wrong agent: " << agent_id
				<< llendl;
		return;
	}*/
	item_array_t items;
	update_map_t update;
	S32 count = content["items"].size();
	bool all_one_folder = true;
	LLUUID folder_id;
	// Does this loop ever execute more than once?
	for(S32 i = 0; i < count; ++i)
	{
		LLPointer<LLViewerInventoryItem> titem = new LLViewerInventoryItem;
		titem->unpackMessage(content["items"][i]);
		
		lldebugs << "LLInventoryModel::messageUpdateCore() item id:"
				 << titem->getUUID() << llendl;
		items.push_back(titem);
		// examine update for changes.
		LLViewerInventoryItem* itemp = gInventory.getItem(titem->getUUID());
		if(itemp)
		{
			if(titem->getParentUUID() == itemp->getParentUUID())
			{
				update[titem->getParentUUID()];
			}
			else
			{
				++update[titem->getParentUUID()];
				--update[itemp->getParentUUID()];
			}
		}
		else
		{
			++update[titem->getParentUUID()];
		}
		if (folder_id.isNull())
		{
			folder_id = titem->getParentUUID();
		}
		else
		{
			all_one_folder = false;
		}
	}

	U32 changes = 0x0;
	//as above, this loop never seems to loop more than once per call
	for (item_array_t::iterator it = items.begin(); it != items.end(); ++it)
	{
		changes |= gInventory.updateItem(*it);
	}
	gInventory.notifyObservers("fetchinventory");
	gViewerWindow->getWindow()->decBusyCount();
}

//If we get back an error (not found, etc...), handle it here
void LLInventoryModel::fetchInventoryResponder::error(U32 status, const std::string& reason)
{
	llinfos << "fetchInventory::error "
		<< status << ": " << reason << llendl;
	gInventory.notifyObservers("fetchinventory");
}

bool LLInventoryModel::fetchDescendentsOf(const LLUUID& folder_id)
{
	if(folder_id.isNull()) 
	{
		llwarns << "Calling fetch descendents on NULL folder id!" << llendl;
		return false;
	}
	LLViewerInventoryCategory* cat = getCategory(folder_id);
	if(!cat)
	{
		llwarns << "Asked to fetch descendents of non-existent folder: "
				<< folder_id << llendl;
		return false;
	}
	//S32 known_descendents = 0;
	///cat_array_t* categories = get_ptr_in_map(mParentChildCategoryTree, folder_id);
	//item_array_t* items = get_ptr_in_map(mParentChildItemTree, folder_id);
	//if(categories)
	//{
	//	known_descendents += categories->count();
	//}
	//if(items)
	//{
	//	known_descendents += items->count();
	//}
	return cat->fetchDescendents();
}

//Initialize statics.
bool LLInventoryModel::isBulkFetchProcessingComplete()
{
	return sFetchQueue.empty() && sBulkFetchCount<=0;
}

class LLInventoryModelFetchDescendentsResponder: public LLHTTPClient::Responder
{
	public:
		LLInventoryModelFetchDescendentsResponder(const LLSD& request_sd) : mRequestSD(request_sd) {};
		//LLInventoryModelFetchDescendentsResponder() {};
		void result(const LLSD& content);
		void error(U32 status, const std::string& reason);
	public:
		typedef std::vector<LLViewerInventoryCategory*> folder_ref_t;
	protected:
		LLSD mRequestSD;
};

//If we get back a normal response, handle it here
void  LLInventoryModelFetchDescendentsResponder::result(const LLSD& content)
{
	if (content.has("folders"))	
	{

		for(LLSD::array_const_iterator folder_it = content["folders"].beginArray();
			folder_it != content["folders"].endArray();
			++folder_it)
		{	
			LLSD folder_sd = *folder_it;
			

			//LLUUID agent_id = folder_sd["agent_id"];

			//if(agent_id != gAgent.getID())	//This should never happen.
			//{
			//	llwarns << "Got a UpdateInventoryItem for the wrong agent."
			//			<< llendl;
			//	break;
			//}

			LLUUID parent_id = folder_sd["folder_id"];
			LLUUID owner_id = folder_sd["owner_id"];
			S32    version  = (S32)folder_sd["version"].asInteger();
			S32    descendents = (S32)folder_sd["descendents"].asInteger();
			LLPointer<LLViewerInventoryCategory> tcategory = new LLViewerInventoryCategory(owner_id);

            if (parent_id.isNull())
            {
			    LLPointer<LLViewerInventoryItem> titem = new LLViewerInventoryItem;
			    for(LLSD::array_const_iterator item_it = folder_sd["items"].beginArray();
				    item_it != folder_sd["items"].endArray();
				    ++item_it)
			    {	
                    const LLUUID lost_uuid = gInventory.findCategoryUUIDForType(LLFolderType::FT_LOST_AND_FOUND);
                    if (lost_uuid.notNull())
                    {
				        LLSD item = *item_it;
				        titem->unpackMessage(item);
				
                        LLInventoryModel::update_list_t update;
                        LLInventoryModel::LLCategoryUpdate new_folder(lost_uuid, 1);
                        update.push_back(new_folder);
                        gInventory.accountForUpdate(update);

                        titem->setParent(lost_uuid);
                        titem->updateParentOnServer(FALSE);
                        gInventory.updateItem(titem);
                        gInventory.notifyObservers("fetchDescendents");
                        
                    }
                }
            }

	        LLViewerInventoryCategory* pcat = gInventory.getCategory(parent_id);
			if (!pcat)
			{
				continue;
			}

			for(LLSD::array_const_iterator category_it = folder_sd["categories"].beginArray();
				category_it != folder_sd["categories"].endArray();
				++category_it)
			{	
				LLSD category = *category_it;
				tcategory->fromLLSD(category); 
							
				if (LLInventoryModel::sMyInventoryFetchStarted ||
					LLInventoryModel::sLibraryFetchStarted)
				{
					sFetchQueue.push_back(tcategory->getUUID());
				}
				else if ( !gInventory.isCategoryComplete(tcategory->getUUID()) )
				{
					gInventory.updateCategory(tcategory);
				}

			}
			LLPointer<LLViewerInventoryItem> titem = new LLViewerInventoryItem;
			for(LLSD::array_const_iterator item_it = folder_sd["items"].beginArray();
				item_it != folder_sd["items"].endArray();
				++item_it)
			{	
				LLSD item = *item_it;
				titem->unpackMessage(item);
				
				gInventory.updateItem(titem);
			}

			// set version and descendentcount according to message.
			LLViewerInventoryCategory* cat = gInventory.getCategory(parent_id);
			if(cat)
			{
				cat->setVersion(version);
				cat->setDescendentCount(descendents);
				cat->determineFolderType();
			}

		}
	}
		
	if (content.has("bad_folders"))
	{
		for(LLSD::array_const_iterator folder_it = content["bad_folders"].beginArray();
			folder_it != content["bad_folders"].endArray();
			++folder_it)
		{	
			LLSD folder_sd = *folder_it;
			
			//These folders failed on the dataserver.  We probably don't want to retry them.
			llinfos << "Folder " << folder_sd["folder_id"].asString() 
					<< "Error: " << folder_sd["error"].asString() << llendl;
		}
	}

	LLInventoryModel::incrBulkFetch(-1);
	
	if (LLInventoryModel::isBulkFetchProcessingComplete())
	{
		llinfos << "Inventory fetch completed" << llendl;
		LLInventoryModel::setAllFoldersFetched();
	}
	
	gInventory.notifyObservers("fetchDescendents");
}

//If we get back an error (not found, etc...), handle it here
void LLInventoryModelFetchDescendentsResponder::error(U32 status, const std::string& reason)
{
	llinfos << "LLInventoryModelFetchDescendentsResponder::error "
		<< status << ": " << reason << llendl;
						
	LLInventoryModel::incrBulkFetch(-1);

	if (status==499)		//timed out.  Let's be awesome!
	{
		for(LLSD::array_const_iterator folder_it = mRequestSD["folders"].beginArray();
			folder_it != mRequestSD["folders"].endArray();
			++folder_it)
		{	
			LLSD folder_sd = *folder_it;
			LLUUID folder_id = folder_sd["folder_id"];
			sFetchQueue.push_front(folder_id);
		}
	}
	else
	{
		if (LLInventoryModel::isBulkFetchProcessingComplete())
		{
			LLInventoryModel::setAllFoldersFetched();
		}
	}
	gInventory.notifyObservers("fetchDescendents");
}

//static   Bundle up a bunch of requests to send all at once.
void LLInventoryModel::bulkFetch(std::string url)
{
	//Background fetch is called from gIdleCallbacks in a loop until background fetch is stopped.
	//If there are items in sFetchQueue, we want to check the time since the last bulkFetch was 
	//sent.  If it exceeds our retry time, go ahead and fire off another batch.  
	//Stopbackgroundfetch will be run from the Responder instead of here.  

	S16 max_concurrent_fetches=8;
	F32 new_min_time = 0.5f;			//HACK!  Clean this up when old code goes away entirely.
	if (sMinTimeBetweenFetches < new_min_time) sMinTimeBetweenFetches=new_min_time;  //HACK!  See above.
	
	if(gDisconnected 
	|| sBulkFetchCount > max_concurrent_fetches
	|| sFetchTimer.getElapsedTimeF32() < sMinTimeBetweenFetches)
	{
		return; // just bail if we are disconnected.
	}	

	U32 folder_count=0;
	U32 max_batch_size=5;

	U32 sort_order = gSavedSettings.getU32("InventorySortOrder") & 0x1;

	LLSD body;
	LLSD body_lib;
	while( !(sFetchQueue.empty() ) && (folder_count < max_batch_size) )
	{
        if (sFetchQueue.front().isNull()) //DEV-17797
        {
			LLSD folder_sd;
			folder_sd["folder_id"]		= LLUUID::null.asString();
			folder_sd["owner_id"]		= gAgent.getID();
			folder_sd["sort_order"]		= (LLSD::Integer)sort_order;
			folder_sd["fetch_folders"]	= (LLSD::Boolean)FALSE;
			folder_sd["fetch_items"]	= (LLSD::Boolean)TRUE;
			body["folders"].append(folder_sd);
            folder_count++;
        }
        else
        {
				

		    LLViewerInventoryCategory* cat = gInventory.getCategory(sFetchQueue.front());
		
		    if (cat)
		    {
			    if ( LLViewerInventoryCategory::VERSION_UNKNOWN == cat->getVersion())
			    {
				    LLSD folder_sd;
				    folder_sd["folder_id"]		= cat->getUUID();
				    folder_sd["owner_id"]		= cat->getOwnerID();
				    folder_sd["sort_order"]		= (LLSD::Integer)sort_order;
				    folder_sd["fetch_folders"]	= TRUE; //(LLSD::Boolean)sFullFetchStarted;
				    folder_sd["fetch_items"]	= (LLSD::Boolean)TRUE;
				    
				    if (ALEXANDRIA_LINDEN_ID == cat->getOwnerID())
					    body_lib["folders"].append(folder_sd);
				    else
					    body["folders"].append(folder_sd);
				    folder_count++;
			    }
			    if (sMyInventoryFetchStarted ||
					sLibraryFetchStarted)
			    {	//Already have this folder but append child folders to list.
				    // add all children to queue
				    parent_cat_map_t::iterator cat_it = gInventory.mParentChildCategoryTree.find(cat->getUUID());
				    if (cat_it != gInventory.mParentChildCategoryTree.end())
				    {
					    cat_array_t* child_categories = cat_it->second;
    
					    for (S32 child_num = 0; child_num < child_categories->count(); child_num++)
					    {
						    sFetchQueue.push_back(child_categories->get(child_num)->getUUID());
					    }
				    }
    
			    }
		    }
        }
		sFetchQueue.pop_front();
	}
		
		if (folder_count > 0)
		{
			sBulkFetchCount++;
			if (body["folders"].size())
			{
				LLHTTPClient::post(url, body, new LLInventoryModelFetchDescendentsResponder(body),300.0);
			}
			if (body_lib["folders"].size())
			{
				std::string url_lib = gAgent.getRegion()->getCapability("FetchLibDescendents");
				LLHTTPClient::post(url_lib, body_lib, new LLInventoryModelFetchDescendentsResponder(body_lib),300.0);
			}
			sFetchTimer.reset();
		}
	else if (isBulkFetchProcessingComplete())
	{
		setAllFoldersFetched();
	}	
}

bool fetchQueueContainsNoDescendentsOf(const LLUUID& cat_id)
{
	for (std::deque<LLUUID>::iterator it = sFetchQueue.begin();
		 it != sFetchQueue.end(); ++it)
	{
		const LLUUID& fetch_id = *it;
		if (gInventory.isObjectDescendentOf(fetch_id, cat_id))
			return false;
	}
	return true;
}

/* static */
bool LLInventoryModel::libraryFetchStarted()
{
	return sLibraryFetchStarted;
}

/* static */
bool LLInventoryModel::libraryFetchCompleted()
{
	return libraryFetchStarted() && fetchQueueContainsNoDescendentsOf(gInventory.getLibraryRootFolderID());
}

/* static */
bool LLInventoryModel::libraryFetchInProgress()
{
	return libraryFetchStarted() && !libraryFetchCompleted();
}
	
/* static */
bool LLInventoryModel::myInventoryFetchStarted()
{
	return sMyInventoryFetchStarted;
}

/* static */
bool LLInventoryModel::myInventoryFetchCompleted()
{
	return myInventoryFetchStarted() && fetchQueueContainsNoDescendentsOf(gInventory.getRootFolderID());
}

/* static */
bool LLInventoryModel::myInventoryFetchInProgress()
{
	return myInventoryFetchStarted() && !myInventoryFetchCompleted();
}

// static
bool LLInventoryModel::isEverythingFetched()
{
	return sAllFoldersFetched;
}

//static
BOOL LLInventoryModel::backgroundFetchActive()
{
	return sBackgroundFetchActive;
}

void LLInventoryModel::startBackgroundFetch(const LLUUID& cat_id)
{
	if (!sAllFoldersFetched)
	{
		sBackgroundFetchActive = TRUE;
		if (cat_id.isNull())
		{
			if (!sMyInventoryFetchStarted)
			{
				sMyInventoryFetchStarted = TRUE;
				sFetchQueue.push_back(gInventory.getRootFolderID());
				gIdleCallbacks.addFunction(&LLInventoryModel::backgroundFetch, NULL);
			}
			if (!sLibraryFetchStarted)
			{
				sLibraryFetchStarted = TRUE;
				sFetchQueue.push_back(gInventory.getLibraryRootFolderID());
				gIdleCallbacks.addFunction(&LLInventoryModel::backgroundFetch, NULL);
			}
		}
		else
		{
			// specific folder requests go to front of queue
			if (sFetchQueue.empty() || sFetchQueue.front() != cat_id)
			{
				sFetchQueue.push_front(cat_id);
				gIdleCallbacks.addFunction(&LLInventoryModel::backgroundFetch, NULL);
			}
			if (cat_id == gInventory.getLibraryRootFolderID())
			{
				sLibraryFetchStarted = TRUE;
			}
			if (cat_id == gInventory.getRootFolderID())
			{
				sMyInventoryFetchStarted = TRUE;
			}
		}
	}
}

//static
void LLInventoryModel::findLostItems()
{
	sBackgroundFetchActive = TRUE;
    sFetchQueue.push_back(LLUUID::null);
    gIdleCallbacks.addFunction(&LLInventoryModel::backgroundFetch, NULL);
}

//static
void LLInventoryModel::stopBackgroundFetch()
{
	if (sBackgroundFetchActive)
	{
		sBackgroundFetchActive = FALSE;
		gIdleCallbacks.deleteFunction(&LLInventoryModel::backgroundFetch, NULL);
		sBulkFetchCount=0;
		sMinTimeBetweenFetches=0.0f;

		LMSortPrefix::completeCleanup();
	}
}

// static
void LLInventoryModel::setAllFoldersFetched()
{
	if (sMyInventoryFetchStarted &&
		sLibraryFetchStarted)
	{
		sAllFoldersFetched = TRUE;
	}
	stopBackgroundFetch();
}

//static 
void LLInventoryModel::backgroundFetch(void*)
{
	if (sBackgroundFetchActive && gAgent.getRegion())
	{
		//If we'll be using the capability, we'll be sending batches and the background thing isn't as important.
		std::string url = gAgent.getRegion()->getCapability("WebFetchInventoryDescendents");   
		if (!url.empty()) 
		{
			bulkFetch(url);
			return;
		}
		
		//DEPRECATED OLD CODE FOLLOWS.
		// no more categories to fetch, stop fetch process
		if (sFetchQueue.empty())
		{
			llinfos << "Inventory fetch completed" << llendl;

			setAllFoldersFetched();
			return;
		}

		F32 fast_fetch_time = lerp(sMinTimeBetweenFetches, sMaxTimeBetweenFetches, 0.1f);
		F32 slow_fetch_time = lerp(sMinTimeBetweenFetches, sMaxTimeBetweenFetches, 0.5f);
		if (sTimelyFetchPending && sFetchTimer.getElapsedTimeF32() > slow_fetch_time)
		{
			// double timeouts on failure
			sMinTimeBetweenFetches = llmin(sMinTimeBetweenFetches * 2.f, 10.f);
			sMaxTimeBetweenFetches = llmin(sMaxTimeBetweenFetches * 2.f, 120.f);
			llinfos << "Inventory fetch times grown to (" << sMinTimeBetweenFetches << ", " << sMaxTimeBetweenFetches << ")" << llendl;
			// fetch is no longer considered "timely" although we will wait for full time-out
			sTimelyFetchPending = FALSE;
		}

		while(1)
		{
			if (sFetchQueue.empty())
			{
				break;
			}

			if(gDisconnected)
			{
				// just bail if we are disconnected.
				break;
			}

			LLViewerInventoryCategory* cat = gInventory.getCategory(sFetchQueue.front());

			// category has been deleted, remove from queue.
			if (!cat)
			{
				sFetchQueue.pop_front();
				continue;
			}
			
			if (sFetchTimer.getElapsedTimeF32() > sMinTimeBetweenFetches && 
				LLViewerInventoryCategory::VERSION_UNKNOWN == cat->getVersion())
			{
				// category exists but has no children yet, fetch the descendants
				// for now, just request every time and rely on retry timer to throttle
				if (cat->fetchDescendents())
				{
					sFetchTimer.reset();
					sTimelyFetchPending = TRUE;
				}
				else
				{
					//  The catagory also tracks if it has expired and here it says it hasn't
					//  yet.  Get out of here because nothing is going to happen until we
					//  update the timers.
					break;
				}
			}
			// do I have all my children?
			else if (gInventory.isCategoryComplete(sFetchQueue.front()))
			{
				// finished with this category, remove from queue
				sFetchQueue.pop_front();

				// add all children to queue
				parent_cat_map_t::iterator cat_it = gInventory.mParentChildCategoryTree.find(cat->getUUID());
				if (cat_it != gInventory.mParentChildCategoryTree.end())
				{
					cat_array_t* child_categories = cat_it->second;

					for (S32 child_num = 0; child_num < child_categories->count(); child_num++)
					{
						sFetchQueue.push_back(child_categories->get(child_num)->getUUID());
					}
				}

				// we received a response in less than the fast time
				if (sTimelyFetchPending && sFetchTimer.getElapsedTimeF32() < fast_fetch_time)
				{
					// shrink timeouts based on success
					sMinTimeBetweenFetches = llmax(sMinTimeBetweenFetches * 0.8f, 0.3f);
					sMaxTimeBetweenFetches = llmax(sMaxTimeBetweenFetches * 0.8f, 10.f);
					//llinfos << "Inventory fetch times shrunk to (" << sMinTimeBetweenFetches << ", " << sMaxTimeBetweenFetches << ")" << llendl;
				}

				sTimelyFetchPending = FALSE;
				continue;
			}
			else if (sFetchTimer.getElapsedTimeF32() > sMaxTimeBetweenFetches)
			{
				// received first packet, but our num descendants does not match db's num descendants
				// so try again later
				LLUUID fetch_id = sFetchQueue.front();
				sFetchQueue.pop_front();

				if (sNumFetchRetries++ < MAX_FETCH_RETRIES)
				{
					// push on back of queue
					sFetchQueue.push_back(fetch_id);
				}
				sTimelyFetchPending = FALSE;
				sFetchTimer.reset();
				break;
			}

			// not enough time has elapsed to do a new fetch
			break;
		}
	}
}

void LLInventoryModel::cache(
	const LLUUID& parent_folder_id,
	const LLUUID& agent_id)
{
	if (getRootFolderID() == parent_folder_id)
	{
		// *TODO: mantipov: can be removed before public release, EXT-3985
		//save marker to avoid fetching inventory on future sessions
		LMSortPrefix::setLandmarksWereCleaned();
	}

	lldebugs << "Caching " << parent_folder_id << " for " << agent_id
			 << llendl;
	LLViewerInventoryCategory* root_cat = getCategory(parent_folder_id);
	if(!root_cat) return;
	cat_array_t categories;
	categories.put(root_cat);
	item_array_t items;

	LLCanCache can_cache(this);
	can_cache(root_cat, NULL);
	collectDescendentsIf(
		parent_folder_id,
		categories,
		items,
		INCLUDE_TRASH,
		can_cache);
	std::string agent_id_str;
	std::string inventory_filename;
	agent_id.toString(agent_id_str);
	std::string path(gDirUtilp->getExpandedFilename(LL_PATH_CACHE, agent_id_str));
	inventory_filename = llformat(CACHE_FORMAT_STRING, path.c_str());
	saveToFile(inventory_filename, categories, items);
	std::string gzip_filename(inventory_filename);
	gzip_filename.append(".gz");
	if(gzip_file(inventory_filename, gzip_filename))
	{
		lldebugs << "Successfully compressed " << inventory_filename << llendl;
		LLFile::remove(inventory_filename);
	}
	else
	{
		llwarns << "Unable to compress " << inventory_filename << llendl;
	}
}


void LLInventoryModel::addCategory(LLViewerInventoryCategory* category)
{
	//llinfos << "LLInventoryModel::addCategory()" << llendl;
	if(category)
	{
		// Insert category uniquely into the map
		mCategoryMap[category->getUUID()] = category; // LLPointer will deref and delete the old one
		//mInventory[category->getUUID()] = category;
	}
}

void LLInventoryModel::addItem(LLViewerInventoryItem* item)
{
	//llinfos << "LLInventoryModel::addItem()" << llendl;

	// This can happen if assettype enums from llassettype.h ever change.
	// For example, there is a known backwards compatibility issue in some viewer prototypes prior to when 
	// the AT_LINK enum changed from 23 to 24.
	if ((item->getType() == LLAssetType::AT_NONE)
		|| LLAssetType::lookup(item->getType()) == LLAssetType::badLookup())
	{
		llwarns << "Got bad asset type for item [ name: " << item->getName() << " type: " << item->getType() << " inv-type: " << item->getInventoryType() << " ], ignoring." << llendl;
		return;
	}
	if(item)
	{
		// This condition means that we tried to add a link without the baseobj being in memory.
		// The item will show up as a broken link.
		if (item->getIsBrokenLink())
		{
			llinfos << "Adding broken link [ name: " << item->getName() << " itemID: " << item->getUUID() << " assetID: " << item->getAssetUUID() << " )  parent: " << item->getParentUUID() << llendl;
		}
		mItemMap[item->getUUID()] = item;
	}
}

// Empty the entire contents
void LLInventoryModel::empty()
{
//	llinfos << "LLInventoryModel::empty()" << llendl;
	std::for_each(
		mParentChildCategoryTree.begin(),
		mParentChildCategoryTree.end(),
		DeletePairedPointer());
	mParentChildCategoryTree.clear();
	std::for_each(
		mParentChildItemTree.begin(),
		mParentChildItemTree.end(),
		DeletePairedPointer());
	mParentChildItemTree.clear();
	mCategoryMap.clear(); // remove all references (should delete entries)
	mItemMap.clear(); // remove all references (should delete entries)
	mLastItem = NULL;
	//mInventory.clear();
}

void LLInventoryModel::accountForUpdate(const LLCategoryUpdate& update) const
{
	LLViewerInventoryCategory* cat = getCategory(update.mCategoryID);
	if(cat)
	{
		bool accounted = false;
		S32 version = cat->getVersion();
		if(version != LLViewerInventoryCategory::VERSION_UNKNOWN)
		{
			S32 descendents_server = cat->getDescendentCount();
			LLInventoryModel::cat_array_t* cats;
			LLInventoryModel::item_array_t* items;
			getDirectDescendentsOf(update.mCategoryID, cats, items);
			S32 descendents_actual = 0;
			if(cats && items)
			{
				descendents_actual = cats->count() + items->count();
			}
			if(descendents_server == descendents_actual)
			{
				accounted = true;
				descendents_actual += update.mDescendentDelta;
				cat->setDescendentCount(descendents_actual);
				cat->setVersion(++version);
				lldebugs << "accounted: '" << cat->getName() << "' "
						 << version << " with " << descendents_actual
						 << " descendents." << llendl;
			}
		}
		if(!accounted)
		{
			// Error condition, this means that the category did not register that
			// it got new descendents (perhaps because it is still being loaded)
			// which means its descendent count will be wrong.
			llwarns << "Accounting failed for '" << cat->getName() << "' version:"
					 << version << llendl;
		}
	}
	else
	{
		llwarns << "No category found for update " << update.mCategoryID << llendl;
	}
}

void LLInventoryModel::accountForUpdate(
	const LLInventoryModel::update_list_t& update)
{
	update_list_t::const_iterator it = update.begin();
	update_list_t::const_iterator end = update.end();
	for(; it != end; ++it)
	{
		accountForUpdate(*it);
	}
}

void LLInventoryModel::accountForUpdate(
	const LLInventoryModel::update_map_t& update)
{
	LLCategoryUpdate up;
	update_map_t::const_iterator it = update.begin();
	update_map_t::const_iterator end = update.end();
	for(; it != end; ++it)
	{
		up.mCategoryID = (*it).first;
		up.mDescendentDelta = (*it).second.mValue;
		accountForUpdate(up);
	}
}


/*
void LLInventoryModel::incrementCategoryVersion(const LLUUID& category_id)
{
	LLViewerInventoryCategory* cat = getCategory(category_id);
	if(cat)
	{
		S32 version = cat->getVersion();
		if(LLViewerInventoryCategory::VERSION_UNKNOWN != version)
		{
			cat->setVersion(version + 1);
			llinfos << "IncrementVersion: " << cat->getName() << " "
					<< cat->getVersion() << llendl;
		}
		else
		{
			llinfos << "Attempt to increment version when unknown: "
					<< category_id << llendl;
		}
	}
	else
	{
		llinfos << "Attempt to increment category: " << category_id << llendl;
	}
}
void LLInventoryModel::incrementCategorySetVersion(
	const std::set<LLUUID>& categories)
{
	if(!categories.empty())
	{ 
		std::set<LLUUID>::const_iterator it = categories.begin();
		std::set<LLUUID>::const_iterator end = categories.end();
		for(; it != end; ++it)
		{
			incrementCategoryVersion(*it);
		}
	}
}
*/


LLInventoryModel::EHasChildren LLInventoryModel::categoryHasChildren(
	const LLUUID& cat_id) const
{
	LLViewerInventoryCategory* cat = getCategory(cat_id);
	if(!cat) return CHILDREN_NO;
	if(cat->getDescendentCount() > 0)
	{
		return CHILDREN_YES;
	}
	if(cat->getDescendentCount() == 0)
	{
		return CHILDREN_NO;
	}
	if((cat->getDescendentCount() == LLViewerInventoryCategory::DESCENDENT_COUNT_UNKNOWN)
	   || (cat->getVersion() == LLViewerInventoryCategory::VERSION_UNKNOWN))
	{
		return CHILDREN_MAYBE;
	}

	// Shouldn't have to run this, but who knows.
	parent_cat_map_t::const_iterator cat_it = mParentChildCategoryTree.find(cat->getUUID());
	if (cat_it != mParentChildCategoryTree.end() && cat_it->second->count() > 0)
	{
		return CHILDREN_YES;
	}
	parent_item_map_t::const_iterator item_it = mParentChildItemTree.find(cat->getUUID());
	if (item_it != mParentChildItemTree.end() && item_it->second->count() > 0)
	{
		return CHILDREN_YES;
	}

	return CHILDREN_NO;
}

bool LLInventoryModel::isCategoryComplete(const LLUUID& cat_id) const
{
	LLViewerInventoryCategory* cat = getCategory(cat_id);
	if(cat && (cat->getVersion()!=LLViewerInventoryCategory::VERSION_UNKNOWN))
	{
		S32 descendents_server = cat->getDescendentCount();
		LLInventoryModel::cat_array_t* cats;
		LLInventoryModel::item_array_t* items;
		getDirectDescendentsOf(cat_id, cats, items);
		S32 descendents_actual = 0;
		if(cats && items)
		{
			descendents_actual = cats->count() + items->count();
		}
		if(descendents_server == descendents_actual)
		{
			return true;
		}
	}
	return false;
}

bool LLInventoryModel::loadSkeleton(
	const LLSD& options,
	const LLUUID& owner_id)
{
	lldebugs << "importing inventory skeleton for " << owner_id << llendl;

	typedef std::set<LLPointer<LLViewerInventoryCategory>, InventoryIDPtrLess> cat_set_t;
	cat_set_t temp_cats;
	bool rv = true;

	for(LLSD::array_const_iterator it = options.beginArray(),
		end = options.endArray(); it != end; ++it)
	{
		LLSD name = (*it)["name"];
		LLSD folder_id = (*it)["folder_id"];
		LLSD parent_id = (*it)["parent_id"];
		LLSD version = (*it)["version"];
		if(name.isDefined()
			&& folder_id.isDefined()
			&& parent_id.isDefined()
			&& version.isDefined()
			&& folder_id.asUUID().notNull() // if an id is null, it locks the viewer.
			) 		
		{
			LLPointer<LLViewerInventoryCategory> cat = new LLViewerInventoryCategory(owner_id);
			cat->rename(name.asString());
			cat->setUUID(folder_id.asUUID());
			cat->setParent(parent_id.asUUID());

			LLFolderType::EType preferred_type = LLFolderType::FT_NONE;
			LLSD type_default = (*it)["type_default"];
			if(type_default.isDefined())
            {
				preferred_type = (LLFolderType::EType)type_default.asInteger();
            }
            cat->setPreferredType(preferred_type);
			cat->setVersion(version.asInteger());
            temp_cats.insert(cat);
		}
		else
		{
			llwarns << "Unable to import near " << name.asString() << llendl;
            rv = false;
		}
	}

	S32 cached_category_count = 0;
	S32 cached_item_count = 0;
	if(!temp_cats.empty())
	{
		update_map_t child_counts;
		cat_array_t categories;
		item_array_t items;
		cat_set_t invalid_categories; // Used to mark categories that weren't successfully loaded.
		std::string owner_id_str;
		owner_id.toString(owner_id_str);
		std::string path(gDirUtilp->getExpandedFilename(LL_PATH_CACHE, owner_id_str));
		std::string inventory_filename;
		inventory_filename = llformat(CACHE_FORMAT_STRING, path.c_str());
		const S32 NO_VERSION = LLViewerInventoryCategory::VERSION_UNKNOWN;
		std::string gzip_filename(inventory_filename);
		gzip_filename.append(".gz");
		LLFILE* fp = LLFile::fopen(gzip_filename, "rb");
		bool remove_inventory_file = false;
		if(fp)
		{
			fclose(fp);
			fp = NULL;
			if(gunzip_file(gzip_filename, inventory_filename))
			{
				// we only want to remove the inventory file if it was
				// gzipped before we loaded, and we successfully
				// gunziped it.
				remove_inventory_file = true;
			}
			else
			{
				llinfos << "Unable to gunzip " << gzip_filename << llendl;
			}
		}
		bool is_cache_obsolete = false;
		if(loadFromFile(inventory_filename, categories, items, is_cache_obsolete))
		{
			// We were able to find a cache of files. So, use what we
			// found to generate a set of categories we should add. We
			// will go through each category loaded and if the version
			// does not match, invalidate the version.
			S32 count = categories.count();
			cat_set_t::iterator not_cached = temp_cats.end();
			std::set<LLUUID> cached_ids;
			for(S32 i = 0; i < count; ++i)
			{
				LLViewerInventoryCategory* cat = categories[i];
				cat_set_t::iterator cit = temp_cats.find(cat);
				if (cit == temp_cats.end())
				{
					continue; // cache corruption?? not sure why this happens -SJB
				}
				LLViewerInventoryCategory* tcat = *cit;
				
				// we can safely ignore anything loaded from file, but
				// not sent down in the skeleton.
				if(cit == not_cached)
				{
					continue;
				}
				if(cat->getVersion() != tcat->getVersion())
				{
					// if the cached version does not match the server version,
					// throw away the version we have so we can fetch the
					// correct contents the next time the viewer opens the folder.
					tcat->setVersion(NO_VERSION);
				}
				else
				{
					cached_ids.insert(tcat->getUUID());
				}
			}

			// go ahead and add the cats returned during the download
			std::set<LLUUID>::const_iterator not_cached_id = cached_ids.end();
			cached_category_count = cached_ids.size();
			for(cat_set_t::iterator it = temp_cats.begin(); it != temp_cats.end(); ++it)
			{
				if(cached_ids.find((*it)->getUUID()) == not_cached_id)
				{
					// this check is performed so that we do not
					// mark new folders in the skeleton (and not in cache)
					// as being cached.
					LLViewerInventoryCategory *llvic = (*it);
					llvic->setVersion(NO_VERSION);
				}
				addCategory(*it);
				++child_counts[(*it)->getParentUUID()];
			}

			// Add all the items loaded which are parented to a
			// category with a correctly cached parent
			S32 bad_link_count = 0;
			cat_map_t::iterator unparented = mCategoryMap.end();
			for(item_array_t::const_iterator item_iter = items.begin();
				item_iter != items.end();
				++item_iter)
			{
				LLViewerInventoryItem *item = (*item_iter).get();
				const cat_map_t::iterator cit = mCategoryMap.find(item->getParentUUID());
				
				if(cit != unparented)
				{
					const LLViewerInventoryCategory* cat = cit->second.get();
					if(cat->getVersion() != NO_VERSION)
					{
						// This can happen if the linked object's baseobj is removed from the cache but the linked object is still in the cache.
						if (item->getIsBrokenLink())
						{
							bad_link_count++;
							lldebugs << "Attempted to add cached link item without baseobj present ( name: "
									 << item->getName() << " itemID: " << item->getUUID()
									 << " assetID: " << item->getAssetUUID()
									 << " ).  Ignoring and invalidating " << cat->getName() << " . " << llendl;
							invalid_categories.insert(cit->second);
							continue;
						}
						addItem(item);
						cached_item_count += 1;
						++child_counts[cat->getUUID()];
					}
				}
			}
			if (bad_link_count > 0)
			{
				llinfos << "Attempted to add " << bad_link_count
						<< " cached link items without baseobj present. "
						<< "The corresponding categories were invalidated." << llendl;
			}
		}
		else
		{
			// go ahead and add everything after stripping the version
			// information.
			for(cat_set_t::iterator it = temp_cats.begin(); it != temp_cats.end(); ++it)
			{
				LLViewerInventoryCategory *llvic = (*it);
				llvic->setVersion(NO_VERSION);
				addCategory(*it);
			}
		}

		// At this point, we need to set the known descendents for each
		// category which successfully cached so that we do not
		// needlessly fetch descendents for categories which we have.
		update_map_t::const_iterator no_child_counts = child_counts.end();
		for(cat_set_t::iterator it = temp_cats.begin(); it != temp_cats.end(); ++it)
		{
			LLViewerInventoryCategory* cat = (*it).get();
			if(cat->getVersion() != NO_VERSION)
			{
				update_map_t::const_iterator the_count = child_counts.find(cat->getUUID());
				if(the_count != no_child_counts)
				{
					const S32 num_descendents = (*the_count).second.mValue;
					cat->setDescendentCount(num_descendents);
				}
				else
				{
					cat->setDescendentCount(0);
				}
			}
		}

		// Invalidate all categories that failed fetching descendents for whatever
		// reason (e.g. one of the descendents was a broken link).
		for (cat_set_t::iterator invalid_cat_it = invalid_categories.begin();
			 invalid_cat_it != invalid_categories.end();
			 invalid_cat_it++)
		{
			LLViewerInventoryCategory* cat = (*invalid_cat_it).get();
			cat->setVersion(NO_VERSION);
			llinfos << "Invalidating category name: " << cat->getName() << " UUID: " << cat->getUUID() << " due to invalid descendents cache" << llendl;
		}

		if(remove_inventory_file)
		{
			// clean up the gunzipped file.
			LLFile::remove(inventory_filename);
		}
		if(is_cache_obsolete)
		{
			// If out of date, remove the gzipped file too.
			llwarns << "Inv cache out of date, removing" << llendl;
			LLFile::remove(gzip_filename);
		}
		categories.clear(); // will unref and delete entries
	}

	llinfos << "Successfully loaded " << cached_category_count
			<< " categories and " << cached_item_count << " items from cache."
			<< llendl;

	return rv;
}

bool LLInventoryModel::loadMeat(const LLSD& options, const LLUUID& owner_id)
{
	llinfos << "importing inventory for " << owner_id << llendl;
	bool rv = true;
	for(LLSD::array_const_iterator it = options.beginArray(),
		end = options.endArray(); it != end; ++it)
	{
		LLSD name = (*it)["name"];
		LLSD item_id = (*it)["item_id"];
		LLSD parent_id = (*it)["parent_id"];
		LLSD asset_type = (*it)["type"];
		LLSD data_id = (*it)["data_id"];
		if(name.isDefined() 
			&& item_id.isDefined()
			&& parent_id.isDefined()
			&& asset_type.isDefined()
			&& data_id.isDefined())
		{
			LLPointer<LLViewerInventoryItem> item = new LLViewerInventoryItem;
			item->rename(name.asString());
			item->setUUID(item_id.asUUID());
			item->setParent(parent_id.asUUID());
			LLAssetType::EType type = (LLAssetType::EType)asset_type.asInteger();
            item->setType(type);

			LLSD llsd_inv_type = (*it)["inv_type"];
			if(llsd_inv_type.isDefined())
            {
				LLInventoryType::EType inv_type = (LLInventoryType::EType)llsd_inv_type.asInteger();
                item->setInventoryType(inv_type);
            }

            if(LLAssetType::AT_CALLINGCARD == type)
            {
                LLPermissions perm;
				perm.init(data_id.asUUID(), owner_id, LLUUID::null, LLUUID::null);
                item->setPermissions(perm);
            }
            else
            {
				LLPermissions default_perm;
				default_perm.init(LLUUID::null, owner_id, LLUUID::null, LLUUID::null);
				LLSD llsd_perm_mask = (*it)["perm_mask"];
				if(llsd_perm_mask.isDefined())
                {
					PermissionMask perm_mask = llsd_perm_mask.asInteger();
					default_perm.initMasks(
						perm_mask, perm_mask, perm_mask, perm_mask, perm_mask);
				}
				else
				{
					default_perm.initMasks(
						PERM_NONE, PERM_NONE, PERM_NONE, PERM_NONE, PERM_NONE);
				}
				item->setPermissions(default_perm);
				item->setAssetUUID(data_id.asUUID());
            }

			LLSD flags = (*it)["flags"];
			if(flags.isDefined())
            {
				// Not sure how well LLSD.asInteger() maps to 
				// unsigned long - using strtoul()
				item->setFlags(strtoul(flags.asString().c_str(), NULL, 0));
            }

			LLSD time = (*it)["time"];
			if(time.isDefined())
            {
				item->setCreationDate(time.asInteger());
            }
            addItem(item);
		}
		else
		{
			llwarns << "Unable to import near " << name.asString() << llendl;
            rv = false;
		}
	}
	return rv;
}

// This is a brute force method to rebuild the entire parent-child
// relations. The overall operation has O(NlogN) performance, which
// should be sufficient for our needs. 
void LLInventoryModel::buildParentChildMap()
{
	llinfos << "LLInventoryModel::buildParentChildMap()" << llendl;

	// *NOTE: I am skipping the logic around folder version
	// synchronization here because it seems if a folder is lost, we
	// might actually want to invalidate it at that point - not
	// attempt to cache. More time & thought is necessary.

	// First the categories. We'll copy all of the categories into a
	// temporary container to iterate over (oh for real iterators.)
	// While we're at it, we'll allocate the arrays in the trees.
	cat_array_t cats;
	cat_array_t* catsp;
	item_array_t* itemsp;
	
	for(cat_map_t::iterator cit = mCategoryMap.begin(); cit != mCategoryMap.end(); ++cit)
	{
		LLViewerInventoryCategory* cat = cit->second;
		cats.put(cat);
		if (mParentChildCategoryTree.count(cat->getUUID()) == 0)
		{
			llassert_always(mCategoryLock[cat->getUUID()] == false);
			catsp = new cat_array_t;
			mParentChildCategoryTree[cat->getUUID()] = catsp;
		}
		if (mParentChildItemTree.count(cat->getUUID()) == 0)
		{
			llassert_always(mItemLock[cat->getUUID()] == false);
			itemsp = new item_array_t;
			mParentChildItemTree[cat->getUUID()] = itemsp;
		}
	}

	// Insert a special parent for the root - so that lookups on
	// LLUUID::null as the parent work correctly. This is kind of a
	// blatent wastes of space since we allocate a block of memory for
	// the array, but whatever - it's not that much space.
	if (mParentChildCategoryTree.count(LLUUID::null) == 0)
	{
		catsp = new cat_array_t;
		mParentChildCategoryTree[LLUUID::null] = catsp;
	}

	// Now we have a structure with all of the categories that we can
	// iterate over and insert into the correct place in the child
	// category tree. 
	S32 count = cats.count();
	S32 i;
	S32 lost = 0;
	for(i = 0; i < count; ++i)
	{
		LLViewerInventoryCategory* cat = cats.get(i);
		catsp = getUnlockedCatArray(cat->getParentUUID());
		if(catsp)
		{
			catsp->put(cat);
		}
		else
		{
			// *NOTE: This process could be a lot more efficient if we
			// used the new MoveInventoryFolder message, but we would
			// have to continue to do the update & build here. So, to
			// implement it, we would need a set or map of uuid pairs
			// which would be (folder_id, new_parent_id) to be sent up
			// to the server.
			llinfos << "Lost categroy: " << cat->getUUID() << " - "
					<< cat->getName() << llendl;
			++lost;
			// plop it into the lost & found.
			LLFolderType::EType pref = cat->getPreferredType();
			if(LLFolderType::FT_NONE == pref)
			{
				cat->setParent(findCategoryUUIDForType(LLFolderType::FT_LOST_AND_FOUND));
			}
			else if(LLFolderType::FT_ROOT_INVENTORY == pref)
			{
				// it's the root
				cat->setParent(LLUUID::null);
			}
			else
			{
				// it's a protected folder.
				cat->setParent(gInventory.getRootFolderID());
			}
			cat->updateServer(TRUE);
			catsp = getUnlockedCatArray(cat->getParentUUID());
			if(catsp)
			{
				catsp->put(cat);
			}
			else
			{		
				llwarns << "Lost and found Not there!!" << llendl;
			}
		}
	}
	if(lost)
	{
		llwarns << "Found  " << lost << " lost categories." << llendl;
	}

	const BOOL COF_exists = (findCategoryUUIDForType(LLFolderType::FT_CURRENT_OUTFIT, FALSE) != LLUUID::null);
	sFirstTimeInViewer2 = !COF_exists || gAgent.isFirstLogin();


	// Now the items. We allocated in the last step, so now all we
	// have to do is iterate over the items and put them in the right
	// place.
	item_array_t items;
	if(!mItemMap.empty())
	{
		LLPointer<LLViewerInventoryItem> item;
		for(item_map_t::iterator iit = mItemMap.begin(); iit != mItemMap.end(); ++iit)
		{
			item = (*iit).second;
			items.put(item);
		}
	}
	count = items.count();
	lost = 0;
	std::vector<LLUUID> lost_item_ids;
	for(i = 0; i < count; ++i)
	{
		LLPointer<LLViewerInventoryItem> item;
		item = items.get(i);
		itemsp = getUnlockedItemArray(item->getParentUUID());
		if(itemsp)
		{
			itemsp->put(item);
		}
		else
		{
			llinfos << "Lost item: " << item->getUUID() << " - "
					<< item->getName() << llendl;
			++lost;
			// plop it into the lost & found.
			//
			item->setParent(findCategoryUUIDForType(LLFolderType::FT_LOST_AND_FOUND));
			// move it later using a special message to move items. If
			// we update server here, the client might crash.
			//item->updateServer();
			lost_item_ids.push_back(item->getUUID());
			itemsp = getUnlockedItemArray(item->getParentUUID());
			if(itemsp)
			{
				itemsp->put(item);
			}
			else
			{
				llwarns << "Lost and found Not there!!" << llendl;
			}
		}
	}
	if(lost)
	{
		llwarns << "Found " << lost << " lost items." << llendl;
		LLMessageSystem* msg = gMessageSystem;
		BOOL start_new_message = TRUE;
		const LLUUID lnf = findCategoryUUIDForType(LLFolderType::FT_LOST_AND_FOUND);
		for(std::vector<LLUUID>::iterator it = lost_item_ids.begin() ; it < lost_item_ids.end(); ++it)
		{
			if(start_new_message)
			{
				start_new_message = FALSE;
				msg->newMessageFast(_PREHASH_MoveInventoryItem);
				msg->nextBlockFast(_PREHASH_AgentData);
				msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID());
				msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID());
				msg->addBOOLFast(_PREHASH_Stamp, FALSE);
			}
			msg->nextBlockFast(_PREHASH_InventoryData);
			msg->addUUIDFast(_PREHASH_ItemID, (*it));
			msg->addUUIDFast(_PREHASH_FolderID, lnf);
			msg->addString("NewName", NULL);
			if(msg->isSendFull(NULL))
			{
				start_new_message = TRUE;
				gAgent.sendReliableMessage();
			}
		}
		if(!start_new_message)
		{
			gAgent.sendReliableMessage();
		}
	}

	const LLUUID &agent_inv_root_id = gInventory.getRootFolderID();
	if (agent_inv_root_id.notNull())
	{
		cat_array_t* catsp = get_ptr_in_map(mParentChildCategoryTree, agent_inv_root_id);
		if(catsp)
		{
			// *HACK - fix root inventory folder
			// some accounts has pbroken inventory root folders
			
			std::string name = "My Inventory";
			LLUUID prev_root_id = mRootFolderID;
			for (parent_cat_map_t::const_iterator it = mParentChildCategoryTree.begin(),
					 it_end = mParentChildCategoryTree.end(); it != it_end; ++it)
			{
				cat_array_t* cat_array = it->second;
				for (cat_array_t::const_iterator cat_it = cat_array->begin(),
						 cat_it_end = cat_array->end(); cat_it != cat_it_end; ++cat_it)
					{
					LLPointer<LLViewerInventoryCategory> category = *cat_it;

					if(category && category->getPreferredType() != LLFolderType::FT_ROOT_INVENTORY)
						continue;
					if ( category && 0 == LLStringUtil::compareInsensitive(name, category->getName()) )
					{
						if(category->getUUID()!=mRootFolderID)
						{
							LLUUID& new_inv_root_folder_id = const_cast<LLUUID&>(mRootFolderID);
							new_inv_root_folder_id = category->getUUID();
						}
					}
				}
			}

			// 'My Inventory',
			// root of the agent's inv found.
			// The inv tree is built.
			mIsAgentInvUsable = true;

			{// *TODO: mantipov: can be removed before public release, EXT-3985
				/*
				*HACK: mantipov: to cleanup landmarks were marked with sort index prefix in name.
				Is necessary to be called once per account after EXT-3985 is implemented.
				So, let fetch agent's inventory, processing will be done in processInventoryDescendents()
				Should be removed before public release.
				*/
				if (!LMSortPrefix::wasClean())
				{
					cat_array_t cats;
					item_array_t items;
					collectDescendents(agent_inv_root_id, cats, items, INCLUDE_TRASH);

					for (item_array_t::const_iterator it= items.begin(); it != items.end(); ++it)
					{
						LMSortPrefix::removePrefix(*it);
					}

					gInventory.startBackgroundFetch(agent_inv_root_id);
				}
			}

			llinfos << "Inventory initialized, notifying observers" << llendl;
			addChangedMask(LLInventoryObserver::ALL, LLUUID::null);
			notifyObservers();
		}
	}
}

struct LLUUIDAndName
{
	LLUUIDAndName() {}
	LLUUIDAndName(const LLUUID& id, const std::string& name);
	bool operator==(const LLUUIDAndName& rhs) const;
	bool operator<(const LLUUIDAndName& rhs) const;
	bool operator>(const LLUUIDAndName& rhs) const;

	LLUUID mID;
	std::string mName;
};

LLUUIDAndName::LLUUIDAndName(const LLUUID& id, const std::string& name) :
	mID(id), mName(name)
{
}

bool LLUUIDAndName::operator==(const LLUUIDAndName& rhs) const
{
	return ((mID == rhs.mID) && (mName == rhs.mName));
}

bool LLUUIDAndName::operator<(const LLUUIDAndName& rhs) const
{
	return (mID < rhs.mID);
}

bool LLUUIDAndName::operator>(const LLUUIDAndName& rhs) const
{
	return (mID > rhs.mID);
}

// Given the current state of the inventory items, figure out the
// clone information. *FIX: This is sub-optimal, since we can insert
// this information snurgically, but this makes sure the implementation
// works before we worry about optimization.
//void LLInventoryModel::recalculateCloneInformation()
//{
//	//dumpInventory();
//
//	// This implements a 'multi-map' like structure to keep track of
//	// how many clones we find.
//	typedef LLDynamicArray<LLViewerInventoryItem*> viewer_item_array_t;
//	typedef std::map<LLUUIDAndName, viewer_item_array_t*> clone_map_t;
//	clone_map_t clone_map;
//	LLUUIDAndName id_and_name;
//	viewer_item_array_t* clones = NULL;
//	LLViewerInventoryItem* item = NULL;
//	for(item = (LLViewerInventoryItem*)mItemMap.getFirstData();
//		item != NULL;
//		item = (LLViewerInventoryItem*)mItemMap.getNextData())
//	{
//		if(item->getType() == LLAssetType::AT_CALLINGCARD)
//		{
//			// if it's a calling card, we key off of the creator id, not
//			// the asset id.
//			id_and_name.mID = item->getCreatorUUID();
//		}
//		else
//		{
//			// if it's not a calling card, we key clones from the
//			// asset id.
//			id_and_name.mID = item->getAssetUUID();
//		}
//		if(id_and_name.mID == LLUUID::null)
//		{
//			continue;
//		}
//		id_and_name.mName = item->getName();
//		if(clone_map.checkData(id_and_name))
//		{
//			clones = clone_map.getData(id_and_name);
//		}
//		else
//		{
//			clones = new viewer_item_array_t;
//			clone_map.addData(id_and_name, clones);
//		}
//		clones->put(item);
//	}
//
//	S32 count = 0;
//	for(clones = clone_map.getFirstData();
//		clones != NULL;
//		clones = clone_map.getNextData())
//	{
//		count = clones->count();
//		for(S32 i = 0; i < count; i++)
//		{
//			item = clones->get(i);
//			item->setCloneCount(count - 1);
//			//clones[i] = NULL;
//		}
//		delete clones;
//	}
//	clone_map.removeAllData();
//	//dumpInventory();
//}

// static
bool LLInventoryModel::loadFromFile(const std::string& filename,
									LLInventoryModel::cat_array_t& categories,
									LLInventoryModel::item_array_t& items,
									bool &is_cache_obsolete)
{
	if(filename.empty())
	{
		llerrs << "Filename is Null!" << llendl;
		return false;
	}
	llinfos << "LLInventoryModel::loadFromFile(" << filename << ")" << llendl;
	LLFILE* file = LLFile::fopen(filename, "rb");		/*Flawfinder: ignore*/
	if(!file)
	{
		llinfos << "unable to load inventory from: " << filename << llendl;
		return false;
	}
	// *NOTE: This buffer size is hard coded into scanf() below.
	char buffer[MAX_STRING];		/*Flawfinder: ignore*/
	char keyword[MAX_STRING];		/*Flawfinder: ignore*/
	char value[MAX_STRING];			/*Flawfinder: ignore*/
	is_cache_obsolete = true;  		// Obsolete until proven current
	while(!feof(file) && fgets(buffer, MAX_STRING, file)) 
	{
		sscanf(buffer, " %126s %126s", keyword, value);	/* Flawfinder: ignore */
		if(0 == strcmp("inv_cache_version", keyword))
		{
			S32 version;
			int succ = sscanf(value,"%d",&version);
			if ((1 == succ) && (version == sCurrentInvCacheVersion))
			{
				// Cache is up to date
				is_cache_obsolete = false;
				continue;
			}
			else
			{
				// Cache is out of date
				break;
			}
		}
		else if(0 == strcmp("inv_category", keyword))
		{
			if (is_cache_obsolete)
				break;
			
			LLPointer<LLViewerInventoryCategory> inv_cat = new LLViewerInventoryCategory(LLUUID::null);
			if(inv_cat->importFileLocal(file))
			{
				categories.put(inv_cat);
			}
			else
			{
				llwarns << "loadInventoryFromFile().  Ignoring invalid inventory category: " << inv_cat->getName() << llendl;
				//delete inv_cat; // automatic when inv_cat is reassigned or destroyed
			}
		}
		else if(0 == strcmp("inv_item", keyword))
		{
			if (is_cache_obsolete)
				break;

			LLPointer<LLViewerInventoryItem> inv_item = new LLViewerInventoryItem;
			if( inv_item->importFileLocal(file) )
			{
				// *FIX: Need a better solution, this prevents the
				// application from freezing, but breaks inventory
				// caching.
				if(inv_item->getUUID().isNull())
				{
					//delete inv_item; // automatic when inv_cat is reassigned or destroyed
					llwarns << "Ignoring inventory with null item id: "
							<< inv_item->getName() << llendl;
						
				}
				else
				{
					items.put(inv_item);
				}
			}
			else
			{
				llwarns << "loadInventoryFromFile().  Ignoring invalid inventory item: " << inv_item->getName() << llendl;
				//delete inv_item; // automatic when inv_cat is reassigned or destroyed
			}
		}
		else
		{
			llwarns << "Unknown token in inventory file '" << keyword << "'"
					<< llendl;
		}
	}
	fclose(file);
	if (is_cache_obsolete)
		return false;
	return true;
}

// static
bool LLInventoryModel::saveToFile(const std::string& filename,
								  const cat_array_t& categories,
								  const item_array_t& items)
{
	if(filename.empty())
	{
		llerrs << "Filename is Null!" << llendl;
		return false;
	}
	llinfos << "LLInventoryModel::saveToFile(" << filename << ")" << llendl;
	LLFILE* file = LLFile::fopen(filename, "wb");		/*Flawfinder: ignore*/
	if(!file)
	{
		llwarns << "unable to save inventory to: " << filename << llendl;
		return false;
	}

	fprintf(file, "\tinv_cache_version\t%d\n",sCurrentInvCacheVersion);
	S32 count = categories.count();
	S32 i;
	for(i = 0; i < count; ++i)
	{
		LLViewerInventoryCategory* cat = categories[i];
		if(cat->getVersion() != LLViewerInventoryCategory::VERSION_UNKNOWN)
		{
			cat->exportFileLocal(file);
		}
	}

	count = items.count();
	for(i = 0; i < count; ++i)
	{
		items[i]->exportFile(file);
	}

	fclose(file);
	return true;
}

// message handling functionality
// static
void LLInventoryModel::registerCallbacks(LLMessageSystem* msg)
{
	//msg->setHandlerFuncFast(_PREHASH_InventoryUpdate,
	//					processInventoryUpdate,
	//					NULL);
	//msg->setHandlerFuncFast(_PREHASH_UseCachedInventory,
	//					processUseCachedInventory,
	//					NULL);
	msg->setHandlerFuncFast(_PREHASH_UpdateCreateInventoryItem,
						processUpdateCreateInventoryItem,
						NULL);
	msg->setHandlerFuncFast(_PREHASH_RemoveInventoryItem,
						processRemoveInventoryItem,
						NULL);
	msg->setHandlerFuncFast(_PREHASH_UpdateInventoryFolder,
						processUpdateInventoryFolder,
						NULL);
	msg->setHandlerFuncFast(_PREHASH_RemoveInventoryFolder,
						processRemoveInventoryFolder,
						NULL);
	//msg->setHandlerFuncFast(_PREHASH_ExchangeCallingCard,
	//						processExchangeCallingcard,
	//						NULL);
	//msg->setHandlerFuncFast(_PREHASH_AddCallingCard,
	//					processAddCallingcard,
	//					NULL);
	//msg->setHandlerFuncFast(_PREHASH_DeclineCallingCard,
	//					processDeclineCallingcard,
	//					NULL);
	msg->setHandlerFuncFast(_PREHASH_SaveAssetIntoInventory,
						processSaveAssetIntoInventory,
						NULL);
	msg->setHandlerFuncFast(_PREHASH_BulkUpdateInventory,
							processBulkUpdateInventory,
							NULL);
	msg->setHandlerFunc("InventoryDescendents", processInventoryDescendents);
	msg->setHandlerFunc("MoveInventoryItem", processMoveInventoryItem);
	msg->setHandlerFunc("FetchInventoryReply", processFetchInventoryReply);
}


// 	static
void LLInventoryModel::processUpdateCreateInventoryItem(LLMessageSystem* msg, void**)
{
	// do accounting and highlight new items if they arrive
	if (gInventory.messageUpdateCore(msg, true))
	{
		U32 callback_id;
		LLUUID item_id;
		msg->getUUIDFast(_PREHASH_InventoryData, _PREHASH_ItemID, item_id);
		msg->getU32Fast(_PREHASH_InventoryData, _PREHASH_CallbackID, callback_id);

		gInventoryCallbacks.fire(callback_id, item_id);
	}

}

// static
void LLInventoryModel::processFetchInventoryReply(LLMessageSystem* msg, void**)
{
	// no accounting
	gInventory.messageUpdateCore(msg, false);
}


bool LLInventoryModel::messageUpdateCore(LLMessageSystem* msg, bool account)
{
	//make sure our added inventory observer is active
	start_new_inventory_observer();

	LLUUID agent_id;
	msg->getUUIDFast(_PREHASH_AgentData, _PREHASH_AgentID, agent_id);
	if(agent_id != gAgent.getID())
	{
		llwarns << "Got a inventory update for the wrong agent: " << agent_id
				<< llendl;
		return false;
	}
	item_array_t items;
	update_map_t update;
	S32 count = msg->getNumberOfBlocksFast(_PREHASH_InventoryData);
	bool all_one_folder = true;
	LLUUID folder_id;
	// Does this loop ever execute more than once?
	for(S32 i = 0; i < count; ++i)
	{
		LLPointer<LLViewerInventoryItem> titem = new LLViewerInventoryItem;
		titem->unpackMessage(msg, _PREHASH_InventoryData, i);
		lldebugs << "LLInventoryModel::messageUpdateCore() item id:"
				 << titem->getUUID() << llendl;
		items.push_back(titem);
		// examine update for changes.
		LLViewerInventoryItem* itemp = gInventory.getItem(titem->getUUID());
		if(itemp)
		{
			if(titem->getParentUUID() == itemp->getParentUUID())
			{
				update[titem->getParentUUID()];
			}
			else
			{
				++update[titem->getParentUUID()];
				--update[itemp->getParentUUID()];
			}
		}
		else
		{
			++update[titem->getParentUUID()];
		}
		if (folder_id.isNull())
		{
			folder_id = titem->getParentUUID();
		}
		else
		{
			all_one_folder = false;
		}
	}
	if(account)
	{
		gInventory.accountForUpdate(update);
	}

	U32 changes = 0x0;
	//as above, this loop never seems to loop more than once per call
	for (item_array_t::iterator it = items.begin(); it != items.end(); ++it)
	{
		changes |= gInventory.updateItem(*it);
	}
	gInventory.notifyObservers();
	gViewerWindow->getWindow()->decBusyCount();

	return true;
}

// 	static
void LLInventoryModel::processRemoveInventoryItem(LLMessageSystem* msg, void**)
{
	lldebugs << "LLInventoryModel::processRemoveInventoryItem()" << llendl;
	LLUUID agent_id, item_id;
	msg->getUUIDFast(_PREHASH_AgentData, _PREHASH_AgentID, agent_id);
	if(agent_id != gAgent.getID())
	{
		llwarns << "Got a RemoveInventoryItem for the wrong agent."
				<< llendl;
		return;
	}
	S32 count = msg->getNumberOfBlocksFast(_PREHASH_InventoryData);
	std::vector<LLUUID> item_ids;
	update_map_t update;
	for(S32 i = 0; i < count; ++i)
	{
		msg->getUUIDFast(_PREHASH_InventoryData, _PREHASH_ItemID, item_id, i);
		LLViewerInventoryItem* itemp = gInventory.getItem(item_id);
		if(itemp)
		{
			// we only bother with the delete and account if we found
			// the item - this is usually a back-up for permissions,
			// so frequently the item will already be gone.
			--update[itemp->getParentUUID()];
			item_ids.push_back(item_id);
		}
	}
	gInventory.accountForUpdate(update);
	for(std::vector<LLUUID>::iterator it = item_ids.begin(); it != item_ids.end(); ++it)
	{
		gInventory.deleteObject(*it);
	}
	gInventory.notifyObservers();
}

// 	static
void LLInventoryModel::processUpdateInventoryFolder(LLMessageSystem* msg,
													void**)
{
	lldebugs << "LLInventoryModel::processUpdateInventoryFolder()" << llendl;
	LLUUID agent_id, folder_id, parent_id;
	//char name[DB_INV_ITEM_NAME_BUF_SIZE];
	msg->getUUIDFast(_PREHASH_FolderData, _PREHASH_AgentID, agent_id);
	if(agent_id != gAgent.getID())
	{
		llwarns << "Got an UpdateInventoryFolder for the wrong agent."
				<< llendl;
		return;
	}
	LLPointer<LLViewerInventoryCategory> lastfolder; // hack
	cat_array_t folders;
	update_map_t update;
	S32 count = msg->getNumberOfBlocksFast(_PREHASH_FolderData);
	for(S32 i = 0; i < count; ++i)
	{
		LLPointer<LLViewerInventoryCategory> tfolder = new LLViewerInventoryCategory(gAgent.getID());
		lastfolder = tfolder;
		tfolder->unpackMessage(msg, _PREHASH_FolderData, i);
		// make sure it's not a protected folder
		tfolder->setPreferredType(LLFolderType::FT_NONE);
		folders.push_back(tfolder);
		// examine update for changes.
		LLViewerInventoryCategory* folderp = gInventory.getCategory(tfolder->getUUID());
		if(folderp)
		{
			if(tfolder->getParentUUID() == folderp->getParentUUID())
			{
				update[tfolder->getParentUUID()];
			}
			else
			{
				++update[tfolder->getParentUUID()];
				--update[folderp->getParentUUID()];
			}
		}
		else
		{
			++update[tfolder->getParentUUID()];
		}
	}
	gInventory.accountForUpdate(update);
	for (cat_array_t::iterator it = folders.begin(); it != folders.end(); ++it)
	{
		gInventory.updateCategory(*it);
	}
	gInventory.notifyObservers();

	// *HACK: Do the 'show' logic for a new item in the inventory.
	LLInventoryPanel *active_panel = LLInventoryPanel::getActiveInventoryPanel();
	if (active_panel)
	{
		active_panel->setSelection(lastfolder->getUUID(), TAKE_FOCUS_NO);
	}
}

// 	static
void LLInventoryModel::processRemoveInventoryFolder(LLMessageSystem* msg,
													void**)
{
	lldebugs << "LLInventoryModel::processRemoveInventoryFolder()" << llendl;
	LLUUID agent_id, folder_id;
	msg->getUUIDFast(_PREHASH_FolderData, _PREHASH_AgentID, agent_id);
	if(agent_id != gAgent.getID())
	{
		llwarns << "Got a RemoveInventoryFolder for the wrong agent."
				<< llendl;
		return;
	}
	std::vector<LLUUID> folder_ids;
	update_map_t update;
	S32 count = msg->getNumberOfBlocksFast(_PREHASH_FolderData);
	for(S32 i = 0; i < count; ++i)
	{
		msg->getUUIDFast(_PREHASH_FolderData, _PREHASH_FolderID, folder_id, i);
		LLViewerInventoryCategory* folderp = gInventory.getCategory(folder_id);
		if(folderp)
		{
			--update[folderp->getParentUUID()];
			folder_ids.push_back(folder_id);
		}
	}
	gInventory.accountForUpdate(update);
	for(std::vector<LLUUID>::iterator it = folder_ids.begin(); it != folder_ids.end(); ++it)
	{
		gInventory.deleteObject(*it);
	}
	gInventory.notifyObservers();
}

// 	static
void LLInventoryModel::processSaveAssetIntoInventory(LLMessageSystem* msg,
													 void**)
{
	LLUUID agent_id;
	msg->getUUIDFast(_PREHASH_AgentData, _PREHASH_AgentID, agent_id);
	if(agent_id != gAgent.getID())
	{
		llwarns << "Got a SaveAssetIntoInventory message for the wrong agent."
				<< llendl;
		return;
	}

	LLUUID item_id;
	msg->getUUIDFast(_PREHASH_InventoryData, _PREHASH_ItemID, item_id);

	// The viewer ignores the asset id because this message is only
	// used for attachments/objects, so the asset id is not used in
	// the viewer anyway.
	lldebugs << "LLInventoryModel::processSaveAssetIntoInventory itemID="
		<< item_id << llendl;
	LLViewerInventoryItem* item = gInventory.getItem( item_id );
	if( item )
	{
		LLCategoryUpdate up(item->getParentUUID(), 0);
		gInventory.accountForUpdate(up);
		gInventory.addChangedMask( LLInventoryObserver::INTERNAL, item_id);
		gInventory.notifyObservers();
	}
	else
	{
		llinfos << "LLInventoryModel::processSaveAssetIntoInventory item"
			" not found: " << item_id << llendl;
	}
	if(gViewerWindow)
	{
		gViewerWindow->getWindow()->decBusyCount();
	}
}

struct InventoryCallbackInfo
{
	InventoryCallbackInfo(U32 callback, const LLUUID& inv_id) :
		mCallback(callback), mInvID(inv_id) {}
	U32 mCallback;
	LLUUID mInvID;
};

// static
void LLInventoryModel::processBulkUpdateInventory(LLMessageSystem* msg, void**)
{
	LLUUID agent_id;
	msg->getUUIDFast(_PREHASH_AgentData, _PREHASH_AgentID, agent_id);
	if(agent_id != gAgent.getID())
	{
		llwarns << "Got a BulkUpdateInventory for the wrong agent." << llendl;
		return;
	}
	LLUUID tid;
	msg->getUUIDFast(_PREHASH_AgentData, _PREHASH_TransactionID, tid);
	llinfos << "Bulk inventory: " << tid << llendl;

	update_map_t update;
	cat_array_t folders;
	S32 count;
	S32 i;
	count = msg->getNumberOfBlocksFast(_PREHASH_FolderData);
	for(i = 0; i < count; ++i)
	{
		LLPointer<LLViewerInventoryCategory> tfolder = new LLViewerInventoryCategory(gAgent.getID());
		tfolder->unpackMessage(msg, _PREHASH_FolderData, i);
		//llinfos << "unpaked folder '" << tfolder->getName() << "' ("
		//		<< tfolder->getUUID() << ") in " << tfolder->getParentUUID()
		//		<< llendl;
		if(tfolder->getUUID().notNull())
		{
			folders.push_back(tfolder);
			LLViewerInventoryCategory* folderp = gInventory.getCategory(tfolder->getUUID());
			if(folderp)
			{
				if(tfolder->getParentUUID() == folderp->getParentUUID())
				{
					update[tfolder->getParentUUID()];
				}
				else
				{
					++update[tfolder->getParentUUID()];
					--update[folderp->getParentUUID()];
				}
			}
			else
			{
				// we could not find the folder, so it is probably
				// new. However, we only want to attempt accounting
				// for the parent if we can find the parent.
				folderp = gInventory.getCategory(tfolder->getParentUUID());
				if(folderp)
				{
					++update[tfolder->getParentUUID()];
				}
			}
		}
	}


	count = msg->getNumberOfBlocksFast(_PREHASH_ItemData);
	std::vector<LLUUID> wearable_ids;
	item_array_t items;
	std::list<InventoryCallbackInfo> cblist;
	for(i = 0; i < count; ++i)
	{
		LLPointer<LLViewerInventoryItem> titem = new LLViewerInventoryItem;
		titem->unpackMessage(msg, _PREHASH_ItemData, i);
		//llinfos << "unpaked item '" << titem->getName() << "' in "
		//		<< titem->getParentUUID() << llendl;
		U32 callback_id;
		msg->getU32Fast(_PREHASH_ItemData, _PREHASH_CallbackID, callback_id);
		if(titem->getUUID().notNull())
		{
			items.push_back(titem);
			cblist.push_back(InventoryCallbackInfo(callback_id, titem->getUUID()));
			if (titem->getInventoryType() == LLInventoryType::IT_WEARABLE)
			{
				wearable_ids.push_back(titem->getUUID());
			}
			// examine update for changes.
			LLViewerInventoryItem* itemp = gInventory.getItem(titem->getUUID());
			if(itemp)
			{
				if(titem->getParentUUID() == itemp->getParentUUID())
				{
					update[titem->getParentUUID()];
				}
				else
				{
					++update[titem->getParentUUID()];
					--update[itemp->getParentUUID()];
				}
			}
			else
			{
				LLViewerInventoryCategory* folderp = gInventory.getCategory(titem->getParentUUID());
				if(folderp)
				{
					++update[titem->getParentUUID()];
				}
			}
		}
		else
		{
			cblist.push_back(InventoryCallbackInfo(callback_id, LLUUID::null));
		}
	}
	gInventory.accountForUpdate(update);

	for (cat_array_t::iterator cit = folders.begin(); cit != folders.end(); ++cit)
	{
		gInventory.updateCategory(*cit);
	}
	for (item_array_t::iterator iit = items.begin(); iit != items.end(); ++iit)
	{
		gInventory.updateItem(*iit);
	}
	gInventory.notifyObservers();

	// The incoming inventory could span more than one BulkInventoryUpdate packet,
	// so record the transaction ID for this purchase, then wear all clothing
	// that comes in as part of that transaction ID.  JC
	if (LLInventoryState::sWearNewClothing)
	{
		LLInventoryState::sWearNewClothingTransactionID = tid;
		LLInventoryState::sWearNewClothing = FALSE;
	}

	if (tid == LLInventoryState::sWearNewClothingTransactionID)
	{
		count = wearable_ids.size();
		for (i = 0; i < count; ++i)
		{
			LLViewerInventoryItem* wearable_item;
			wearable_item = gInventory.getItem(wearable_ids[i]);
			wear_inventory_item_on_avatar(wearable_item);
		}
	}

	std::list<InventoryCallbackInfo>::iterator inv_it;
	for (inv_it = cblist.begin(); inv_it != cblist.end(); ++inv_it)
	{
		InventoryCallbackInfo cbinfo = (*inv_it);
		gInventoryCallbacks.fire(cbinfo.mCallback, cbinfo.mInvID);
	}
	// Don't show the inventory.  We used to call showAgentInventory here.
	//LLFloaterInventory* view = LLFloaterInventory::getActiveInventory();
	//if(view)
	//{
	//	const BOOL take_keyboard_focus = FALSE;
	//	view->setSelection(category.getUUID(), take_keyboard_focus );
	//	LLView* focus_view = gFocusMgr.getKeyboardFocus();
	//	LLFocusMgr::FocusLostCallback callback = gFocusMgr.getFocusCallback();
	//	// HACK to open inventory offers that are accepted.  This information
	//	// really needs to flow through the instant messages and inventory
	//	// transfer/update messages.
	//	if (LLFloaterInventory::sOpenNextNewItem)
	//	{
	//		view->openSelected();
	//		LLFloaterInventory::sOpenNextNewItem = FALSE;
	//	}
	//
	//	// restore keyboard focus
	//	gFocusMgr.setKeyboardFocus(focus_view);
	//}
}

// static
void LLInventoryModel::processInventoryDescendents(LLMessageSystem* msg,void**)
{
	LLUUID agent_id;
	msg->getUUIDFast(_PREHASH_AgentData, _PREHASH_AgentID, agent_id);
	if(agent_id != gAgent.getID())
	{
		llwarns << "Got a UpdateInventoryItem for the wrong agent." << llendl;
		return;
	}
	LLUUID parent_id;
	msg->getUUID("AgentData", "FolderID", parent_id);
	LLUUID owner_id;
	msg->getUUID("AgentData", "OwnerID", owner_id);
	S32 version;
	msg->getS32("AgentData", "Version", version);
	S32 descendents;
	msg->getS32("AgentData", "Descendents", descendents);

	S32 i;
	S32 count = msg->getNumberOfBlocksFast(_PREHASH_FolderData);
	LLPointer<LLViewerInventoryCategory> tcategory = new LLViewerInventoryCategory(owner_id);
	for(i = 0; i < count; ++i)
	{
		tcategory->unpackMessage(msg, _PREHASH_FolderData, i);
		gInventory.updateCategory(tcategory);
	}

	count = msg->getNumberOfBlocksFast(_PREHASH_ItemData);
	LLPointer<LLViewerInventoryItem> titem = new LLViewerInventoryItem;
	for(i = 0; i < count; ++i)
	{
		titem->unpackMessage(msg, _PREHASH_ItemData, i);
		// If the item has already been added (e.g. from link prefetch), then it doesn't need to be re-added.
		if (gInventory.getItem(titem->getUUID()))
		{
			lldebugs << "Skipping prefetched item [ Name: " << titem->getName() << " | Type: " << titem->getActualType() << " | ItemUUID: " << titem->getUUID() << " ] " << llendl;
			continue;
		}
		gInventory.updateItem(titem);

		{// *TODO: mantipov: can be removed before public release, EXT-3985
			LMSortPrefix::removePrefix(titem);
		}
	}

	// set version and descendentcount according to message.
	LLViewerInventoryCategory* cat = gInventory.getCategory(parent_id);
	if(cat)
	{
		cat->setVersion(version);
		cat->setDescendentCount(descendents);
		// Get this UUID on the changed list so that whatever's listening for it
		// will get triggered.
		gInventory.addChangedMask(LLInventoryObserver::INTERNAL, cat->getUUID());
	}
	gInventory.notifyObservers();
}

// static
void LLInventoryModel::processMoveInventoryItem(LLMessageSystem* msg, void**)
{
	lldebugs << "LLInventoryModel::processMoveInventoryItem()" << llendl;
	LLUUID agent_id;
	msg->getUUIDFast(_PREHASH_AgentData, _PREHASH_AgentID, agent_id);
	if(agent_id != gAgent.getID())
	{
		llwarns << "Got a MoveInventoryItem message for the wrong agent."
				<< llendl;
		return;
	}

	LLUUID item_id;
	LLUUID folder_id;
	std::string new_name;
	bool anything_changed = false;
	S32 count = msg->getNumberOfBlocksFast(_PREHASH_InventoryData);
	for(S32 i = 0; i < count; ++i)
	{
		msg->getUUIDFast(_PREHASH_InventoryData, _PREHASH_ItemID, item_id, i);
		LLViewerInventoryItem* item = gInventory.getItem(item_id);
		if(item)
		{
			LLPointer<LLViewerInventoryItem> new_item = new LLViewerInventoryItem(item);
			msg->getUUIDFast(_PREHASH_InventoryData, _PREHASH_FolderID, folder_id, i);
			msg->getString("InventoryData", "NewName", new_name, i);

			lldebugs << "moving item " << item_id << " to folder "
					 << folder_id << llendl;
			update_list_t update;
			LLCategoryUpdate old_folder(item->getParentUUID(), -1);
			update.push_back(old_folder);
			LLCategoryUpdate new_folder(folder_id, 1);
			update.push_back(new_folder);
			gInventory.accountForUpdate(update);

			new_item->setParent(folder_id);
			if (new_name.length() > 0)
			{
				new_item->rename(new_name);
			}
			gInventory.updateItem(new_item);
			anything_changed = true;
		}
		else
		{
			llinfos << "LLInventoryModel::processMoveInventoryItem item not found: " << item_id << llendl;
		}
	}
	if(anything_changed)
	{
		gInventory.notifyObservers();
	}
}

//----------------------------------------------------------------------------

// Trash: LLFolderType::FT_TRASH, "ConfirmEmptyTrash"
// Lost&Found: LLFolderType::FT_LOST_AND_FOUND, "ConfirmEmptyLostAndFound"

bool LLInventoryModel::callbackEmptyFolderType(const LLSD& notification, const LLSD& response, LLFolderType::EType preferred_type)
{
	S32 option = LLNotificationsUtil::getSelectedOption(notification, response);
	if (option == 0) // YES
	{
		const LLUUID folder_id = findCategoryUUIDForType(preferred_type);
		purgeDescendentsOf(folder_id);
		notifyObservers();
	}
	return false;
}

void LLInventoryModel::emptyFolderType(const std::string notification, LLFolderType::EType preferred_type)
{
	if (!notification.empty())
	{
		LLNotificationsUtil::add(notification, LLSD(), LLSD(),
										boost::bind(&LLInventoryModel::callbackEmptyFolderType, this, _1, _2, preferred_type));
	}
	else
	{
		const LLUUID folder_id = findCategoryUUIDForType(preferred_type);
		purgeDescendentsOf(folder_id);
		notifyObservers();
	}
}

//----------------------------------------------------------------------------

void LLInventoryModel::removeItem(const LLUUID& item_id)
{
	LLViewerInventoryItem* item = getItem(item_id);
	const LLUUID new_parent = findCategoryUUIDForType(LLFolderType::FT_TRASH);
	if (item && item->getParentUUID() != new_parent)
	{
		LLInventoryModel::update_list_t update;
		LLInventoryModel::LLCategoryUpdate old_folder(item->getParentUUID(),-1);
		update.push_back(old_folder);
		LLInventoryModel::LLCategoryUpdate new_folder(new_parent, 1);
		update.push_back(new_folder);
		accountForUpdate(update);

		LLPointer<LLViewerInventoryItem> new_item = new LLViewerInventoryItem(item);
		new_item->setParent(new_parent);
		new_item->updateParentOnServer(TRUE);
		updateItem(new_item);
		notifyObservers();
	}
}

const LLUUID &LLInventoryModel::getRootFolderID() const
{
	return mRootFolderID;
}

void LLInventoryModel::setRootFolderID(const LLUUID& val)
{
	mRootFolderID = val;
}

const LLUUID &LLInventoryModel::getLibraryRootFolderID() const
{
	return mLibraryRootFolderID;
}

void LLInventoryModel::setLibraryRootFolderID(const LLUUID& val)
{
	mLibraryRootFolderID = val;
}

const LLUUID &LLInventoryModel::getLibraryOwnerID() const
{
	return mLibraryOwnerID;
}

void LLInventoryModel::setLibraryOwnerID(const LLUUID& val)
{
	mLibraryOwnerID = val;
}

// static
BOOL LLInventoryModel::getIsFirstTimeInViewer2()
{
	// Do not call this before parentchild map is built.
	if (!gInventory.mIsAgentInvUsable)
	{
		llwarns << "Parent Child Map not yet built; guessing as first time in viewer2." << llendl;
		return TRUE;
	}

	return sFirstTimeInViewer2;
}

static LLInventoryModel::item_array_t::iterator find_item_iter_by_uuid(LLInventoryModel::item_array_t& items, const LLUUID& id)
{
	LLInventoryModel::item_array_t::iterator result = items.end();

	for (LLInventoryModel::item_array_t::iterator i = items.begin(); i != items.end(); ++i)
	{
		if ((*i)->getUUID() == id)
		{
			result = i;
			break;
		}
	}

	return result;
}

// static
void LLInventoryModel::updateItemsOrder(LLInventoryModel::item_array_t& items, const LLUUID& src_item_id, const LLUUID& dest_item_id)
{
	LLInventoryModel::item_array_t::iterator it_src = find_item_iter_by_uuid(items, src_item_id);
	LLInventoryModel::item_array_t::iterator it_dest = find_item_iter_by_uuid(items, dest_item_id);

	if (it_src == items.end() || it_dest == items.end()) return;

	LLViewerInventoryItem* src_item = *it_src;
	items.erase(it_src);
	
	// target iterator can not be valid because the container was changed, so update it.
	it_dest = find_item_iter_by_uuid(items, dest_item_id);
	items.insert(it_dest, src_item);
}

void LLInventoryModel::saveItemsOrder(const LLInventoryModel::item_array_t& items)
{
	int sortField = 0;

	// current order is saved by setting incremental values (1, 2, 3, ...) for the sort field
	for (item_array_t::const_iterator i = items.begin(); i != items.end(); ++i)
	{
		LLViewerInventoryItem* item = *i;

		item->setSortField(++sortField);
		item->setComplete(TRUE);
		item->updateServer(FALSE);

		updateItem(item);

		// Tell the parent folder to refresh its sort order.
		addChangedMask(LLInventoryObserver::SORT, item->getParentUUID());
	}

	notifyObservers();
}

// See also LLInventorySort where landmarks in the Favorites folder are sorted.
class LLViewerInventoryItemSort
{
public:
	bool operator()(const LLPointer<LLViewerInventoryItem>& a, const LLPointer<LLViewerInventoryItem>& b)
	{
		return a->getSortField() < b->getSortField();
	}
};

/**
 * Sorts passed items by LLViewerInventoryItem sort field.
 *
 * @param[in, out] items - array of items, not sorted.
 */
static void rearrange_item_order_by_sort_field(LLInventoryModel::item_array_t& items)
{
	static LLViewerInventoryItemSort sort_functor;
	std::sort(items.begin(), items.end(), sort_functor);
}

void LLInventoryModel::rearrangeFavoriteLandmarks(const LLUUID& source_item_id, const LLUUID& target_item_id)
{
	LLInventoryModel::cat_array_t cats;
	LLInventoryModel::item_array_t items;
	LLIsType is_type(LLAssetType::AT_LANDMARK);
	LLUUID favorites_id = gInventory.findCategoryUUIDForType(LLFolderType::FT_FAVORITE);
	gInventory.collectDescendentsIf(favorites_id, cats, items, LLInventoryModel::EXCLUDE_TRASH, is_type);

	// ensure items are sorted properly before changing order. EXT-3498
	rearrange_item_order_by_sort_field(items);

	// update order
	updateItemsOrder(items, source_item_id, target_item_id);

	saveItemsOrder(items);
}

//----------------------------------------------------------------------------

// *NOTE: DEBUG functionality
void LLInventoryModel::dumpInventory() const
{
	llinfos << "\nBegin Inventory Dump\n**********************:" << llendl;
	llinfos << "mCategory[] contains " << mCategoryMap.size() << " items." << llendl;
	for(cat_map_t::const_iterator cit = mCategoryMap.begin(); cit != mCategoryMap.end(); ++cit)
	{
		const LLViewerInventoryCategory* cat = cit->second;
		if(cat)
		{
			llinfos << "  " <<  cat->getUUID() << " '" << cat->getName() << "' "
					<< cat->getVersion() << " " << cat->getDescendentCount()
					<< llendl;
		}
		else
		{
			llinfos << "  NULL!" << llendl;
		}
	}	
	llinfos << "mItemMap[] contains " << mItemMap.size() << " items." << llendl;
	for(item_map_t::const_iterator iit = mItemMap.begin(); iit != mItemMap.end(); ++iit)
	{
		const LLViewerInventoryItem* item = iit->second;
		if(item)
		{
			llinfos << "  " << item->getUUID() << " "
					<< item->getName() << llendl;
		}
		else
		{
			llinfos << "  NULL!" << llendl;
		}
	}
	llinfos << "\n**********************\nEnd Inventory Dump" << llendl;
}

///----------------------------------------------------------------------------
/// LLInventoryCollectFunctor implementations
///----------------------------------------------------------------------------

// static
bool LLInventoryCollectFunctor::itemTransferCommonlyAllowed(LLInventoryItem* item)
{
	if (!item)
		return false;

	bool allowed = false;
	LLVOAvatarSelf* my_avatar = NULL;

	switch(item->getType())
	{
	case LLAssetType::AT_CALLINGCARD:
		// not allowed
		break;
		
	case LLAssetType::AT_OBJECT:
		my_avatar = gAgent.getAvatarObject();
		if(my_avatar && !my_avatar->isWearingAttachment(item->getUUID()))
		{
			allowed = true;
		}
		break;
		
	case LLAssetType::AT_BODYPART:
	case LLAssetType::AT_CLOTHING:
		if(!gAgentWearables.isWearingItem(item->getUUID()))
		{
			allowed = true;
		}
		break;
		
	default:
		allowed = true;
		break;
	}

	return allowed;
}

bool LLIsType::operator()(LLInventoryCategory* cat, LLInventoryItem* item)
{
	if(mType == LLAssetType::AT_CATEGORY)
	{
		if(cat) return TRUE;
	}
	if(item)
	{
		if(item->getType() == mType) return TRUE;
	}
	return FALSE;
}

bool LLIsNotType::operator()(LLInventoryCategory* cat, LLInventoryItem* item)
{
	if(mType == LLAssetType::AT_CATEGORY)
	{
		if(cat) return FALSE;
	}
	if(item)
	{
		if(item->getType() == mType) return FALSE;
		else return TRUE;
	}
	return TRUE;
}

bool LLIsTypeWithPermissions::operator()(LLInventoryCategory* cat, LLInventoryItem* item)
{
	if(mType == LLAssetType::AT_CATEGORY)
	{
		if(cat) 
		{
			return TRUE;
		}
	}
	if(item)
	{
		if(item->getType() == mType)
		{
			LLPermissions perm = item->getPermissions();
			if ((perm.getMaskBase() & mPerm) == mPerm)
			{
				return TRUE;
			}
		}
	}
	return FALSE;
}


//bool LLIsClone::operator()(LLInventoryCategory* cat, LLInventoryItem* item)
//{
//	if(cat) return FALSE;
//	if(item)
//	{
//		if(mItemMap->getType() == LLAssetType::AT_CALLINGCARD)
//		{
//			if((item->getType() == LLAssetType::AT_CALLINGCARD)
//			   && !(item->getCreatorUUID().isNull())
//			   && (item->getCreatorUUID() == mItemMap->getCreatorUUID()))
//			{
//				return TRUE;
//			}
//		}
//		else
//		{
//			if((item->getType() == mItemMap->getType())
//			   && !(item->getAssetUUID().isNull())
//			   && (item->getAssetUUID() == mItemMap->getAssetUUID())
//			   && (item->getName() == mItemMap->getName()))
//			{
//				return TRUE;
//			}
//		}
//	}
//	return FALSE;
//}

bool LLBuddyCollector::operator()(LLInventoryCategory* cat,
								  LLInventoryItem* item)
{
	if(item)
	{
		if((LLAssetType::AT_CALLINGCARD == item->getType())
		   && (!item->getCreatorUUID().isNull())
		   && (item->getCreatorUUID() != gAgent.getID()))
		{
			return true;
		}
	}
	return false;
}


bool LLUniqueBuddyCollector::operator()(LLInventoryCategory* cat,
										LLInventoryItem* item)
{
	if(item)
	{
		if((LLAssetType::AT_CALLINGCARD == item->getType())
 		   && (item->getCreatorUUID().notNull())
 		   && (item->getCreatorUUID() != gAgent.getID()))
		{
			mSeen.insert(item->getCreatorUUID());
			return true;
		}
	}
	return false;
}


bool LLParticularBuddyCollector::operator()(LLInventoryCategory* cat,
											LLInventoryItem* item)
{
	if(item)
	{
		if((LLAssetType::AT_CALLINGCARD == item->getType())
		   && (item->getCreatorUUID() == mBuddyID))
		{
			return TRUE;
		}
	}
	return FALSE;
}


bool LLNameCategoryCollector::operator()(
	LLInventoryCategory* cat, LLInventoryItem* item)
{
	if(cat)
	{
		if (!LLStringUtil::compareInsensitive(mName, cat->getName()))
		{
			return true;
		}
	}
	return false;
}

///----------------------------------------------------------------------------
/// LLAssetIDMatches 
///----------------------------------------------------------------------------
bool LLAssetIDMatches::operator()(LLInventoryCategory* cat, LLInventoryItem* item)
{
	return (item && item->getAssetUUID() == mAssetID);
}

///----------------------------------------------------------------------------
/// LLLinkedItemIDMatches 
///----------------------------------------------------------------------------
bool LLLinkedItemIDMatches::operator()(LLInventoryCategory* cat, LLInventoryItem* item)
{
	return (item && 
			(item->getIsLinkType()) &&
			(item->getLinkedUUID() == mBaseItemID)); // A linked item's assetID will be the compared-to item's itemID.
}

///----------------------------------------------------------------------------
/// Local function definitions
///----------------------------------------------------------------------------


/*
BOOL decompress_file(const char* src_filename, const char* dst_filename)
{
	BOOL rv = FALSE;
	gzFile src = NULL;
	U8* buffer = NULL;
	LLFILE* dst = NULL;
	S32 bytes = 0;
	const S32 DECOMPRESS_BUFFER_SIZE = 32000;

	// open the files
	src = gzopen(src_filename, "rb");
	if(!src) goto err_decompress;
	dst = LLFile::fopen(dst_filename, "wb");
	if(!dst) goto err_decompress;

	// decompress.
	buffer = new U8[DECOMPRESS_BUFFER_SIZE + 1];

	do
	{
		bytes = gzread(src, buffer, DECOMPRESS_BUFFER_SIZE);
		if (bytes < 0)
		{
			goto err_decompress;
		}

		fwrite(buffer, bytes, 1, dst);
	} while(gzeof(src) == 0);

	// success
	rv = TRUE;

 err_decompress:
	if(src != NULL) gzclose(src);
	if(buffer != NULL) delete[] buffer;
	if(dst != NULL) fclose(dst);
	return rv;
}
*/