/** 
* @file   llavatarfolder.h
* @brief  Header file for llavatarfolder
* @author Gilbert@lindenlab.com
*
* $LicenseInfo:firstyear=2013&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2013, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
* $/LicenseInfo$
*/
#ifndef LL_LLPERSONMODELCOMMON_H
#define LL_LLPERSONMODELCOMMON_H

#include "../llui/llfolderviewitem.h"
#include "../llui/llfolderviewmodel.h"

class LLPersonTabModel;
class LLPersonModel;

// Conversation items: we hold a list of those and create an LLFolderViewItem widget for each  
// that we tuck into the mConversationsListPanel. 
class LLPersonModelCommon : public LLFolderViewModelItemCommon
{
public:

	LLPersonModelCommon(std::string name, LLFolderViewModelInterface& root_view_model);
	LLPersonModelCommon(LLFolderViewModelInterface& root_view_model);
	virtual ~LLPersonModelCommon();

	// Stub those things we won't really be using in this conversation context
	virtual const std::string& getName() const { return mName; }
	virtual const std::string& getDisplayName() const { return mName; }
	virtual const std::string& getSearchableName() const { return mName; }
	virtual LLPointer<LLUIImage> getIcon() const { return NULL; }
	virtual LLPointer<LLUIImage> getOpenIcon() const { return getIcon(); }
	virtual LLFontGL::StyleFlags getLabelStyle() const { return LLFontGL::NORMAL; }
	virtual std::string getLabelSuffix() const { return LLStringUtil::null; }
	virtual BOOL isItemRenameable() const { return TRUE; }
	virtual BOOL renameItem(const std::string& new_name) { mName = new_name; return TRUE; }
	virtual BOOL isItemMovable( void ) const { return FALSE; }
	virtual BOOL isItemRemovable( void ) const { return FALSE; }
	virtual BOOL isItemInTrash( void) const { return FALSE; }
	virtual BOOL removeItem() { return FALSE; }
	virtual void removeBatch(std::vector<LLFolderViewModelItem*>& batch) { }
	virtual void move( LLFolderViewModelItem* parent_listener ) { }
	virtual BOOL isItemCopyable() const { return FALSE; }
	virtual BOOL copyToClipboard() const { return FALSE; }
	virtual BOOL cutToClipboard() const { return FALSE; }
	virtual BOOL isClipboardPasteable() const { return FALSE; }
	virtual void pasteFromClipboard() { }
	virtual void pasteLinkFromClipboard() { }
	virtual void buildContextMenu(LLMenuGL& menu, U32 flags) { }
	virtual BOOL isUpToDate() const { return TRUE; }
	virtual bool hasChildren() const { return FALSE; }

	virtual bool potentiallyVisible() { return true; }
	virtual bool filter( LLFolderViewFilter& filter) { return false; }
	virtual bool descendantsPassedFilter(S32 filter_generation = -1) { return true; }
	virtual void setPassedFilter(bool passed, S32 filter_generation, std::string::size_type string_offset = std::string::npos, std::string::size_type string_size = 0) { }
	virtual bool passedFilter(S32 filter_generation = -1) { return true; }

	// The action callbacks
	virtual void performAction(LLInventoryModel* model, std::string action);
	virtual void openItem( void );
	virtual void closeItem( void );
	virtual void previewItem( void );
	virtual void selectItem(void) { } 
	virtual void showProperties(void);

	// This method will be called to determine if a drop can be
	// performed, and will set drop to TRUE if a drop is
	// requested. 
	// Returns TRUE if a drop is possible/happened, FALSE otherwise.
	virtual BOOL dragOrDrop(MASK mask, BOOL drop,
		EDragAndDropType cargo_type,
		void* cargo_data,
		std::string& tooltip_msg) { return FALSE; }

	const LLUUID& getID() {return mID;}
	void postEvent(const std::string& event_type, LLPersonTabModel* session, LLPersonModel* participant);

protected:

	std::string mName;	// Name of the session or the participant
	LLUUID mID;
};	

class LLPersonTabModel : public LLPersonModelCommon
{
public:
	LLPersonTabModel(std::string display_name, LLFolderViewModelInterface& root_view_model);
	LLPersonTabModel(LLFolderViewModelInterface& root_view_model);

	LLPointer<LLUIImage> getIcon() const { return NULL; }
	void addParticipant(LLPersonModel* participant);
	void removeParticipant(LLPersonModel* participant);
	void removeParticipant(const LLUUID& participant_id);
	void clearParticipants();
	LLPersonModel* findParticipant(const LLUUID& person_id);

private:
};

class LLPersonModel : public LLPersonModelCommon
{
public:
	LLPersonModel(const LLUUID& agent_id, const std::string display_name, LLFolderViewModelInterface& root_view_model);
	LLPersonModel(LLFolderViewModelInterface& root_view_model);

	LLUUID getAgentID();

private:
	LLUUID mAgentID;
};

// Filtering functional object

class LLPersonViewFilter : public LLFolderViewFilter
{
public:

	enum ESortOrderType
	{
		SO_NAME = 0,						// Sort by name
		SO_DATE = 0x1,						// Sort by date (most recent)
		SO_SESSION_TYPE = 0x2,				// Sort by type (valid only for sessions)
		SO_DISTANCE = 0x3,					// Sort by distance (valid only for participants in nearby chat)
	};
	// Default sort order is by type for sessions and by date for participants
	static const U32 SO_DEFAULT = (SO_SESSION_TYPE << 16) | (SO_DATE);

	LLPersonViewFilter();
	~LLPersonViewFilter() {}

	void 				setFilterSubString(const std::string& string);
	std::string::size_type getFilterStringSize() const;
	bool 				check(const LLFolderViewModelItem* item);
	bool				showAllResults() const;
	std::string::size_type getStringMatchOffset(LLFolderViewModelItem* item) const;
 	bool 				isActive() const;
	bool 				isModified() const;
	void 				clearModified();
   
	bool				checkFolder(const LLFolderViewModelItem* folder) const { return true; }
    
	void 				setEmptyLookupMessage(const std::string& message) { }
	std::string			getEmptyLookupMessage() const { return mEmpty; }

	const std::string& 	getName() const { return mEmpty; }
	const std::string& 	getFilterText() { return mEmpty; }
	void 				setModified(EFilterModified behavior = FILTER_RESTART) { }

	void 				setFilterCount(S32 count) { }
	S32 				getFilterCount() const { return 0; }
	void 				decrementFilterCount() { }

	bool 				isDefault() const { return true; }
	bool 				isNotDefault() const { return false; }
	void 				markDefault() { }
	void 				resetDefault() { }

	S32 				getCurrentGeneration() const { return 0; }
	S32 				getFirstSuccessGeneration() const { return 0; }
	S32 				getFirstRequiredGeneration() const { return 0; }
    
private:
	std::string         mEmpty;
	std::string			mFilterSubString;
	EFilterModified 	mFilterModified;
};

class LLPersonViewSort
{
public:
	LLPersonViewSort(U32 order = LLPersonViewFilter::SO_DEFAULT) : mSortOrder(order) { }

	bool operator()(const LLPersonModelCommon* const& a, const LLPersonModelCommon* const& b) const {return false;}
	operator U32() const { return mSortOrder; }
private:
	// Note: we're treating this value as a sort order bitmask as done in other places in the code (e.g. inventory)
	U32  mSortOrder;
};


class LLPersonFolderViewModel
	: public  LLFolderViewModel<LLPersonViewSort, LLPersonModelCommon, LLPersonModelCommon, LLPersonViewFilter>
{
public:
	typedef LLFolderViewModel<LLPersonViewSort, LLPersonModelCommon, LLPersonModelCommon, LLPersonViewFilter> base_t;

	void sort(LLFolderViewFolder* folder) { base_t::sort(folder);}
	bool startDrag(std::vector<LLFolderViewModelItem*>& items) { return false; } // We do not allow drag of conversation items
};


#endif // LL_LLPERSONMODELCOMMON_H