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/* This class encapsulates the global information about a folder stored in the
	summary file.
*/
#ifndef _nsDBFolderInfo_H
#define _nsDBFolderInfo_H

#include "nsString.h"
#include "MailNewsTypes.h"
#include "mdb.h"
#include "nsMsgKeyArray.h"
#include "nsIDBFolderInfo.h"
#include <time.h>

class nsMsgDatabase;

// again, this could inherit from nsISupports, but I don't see the need as of yet.
// I'm not sure it needs to be ref-counted (but I think it does).

// I think these getters and setters really need to go through mdb and not rely on the object
// caching the values. If this somehow turns out to be prohibitively expensive, we can invent
// some sort of dirty mechanism, but I think it turns out that these values will be cached by 
// the MSG_FolderInfo's anyway.
class nsDBFolderInfo : public nsIDBFolderInfo
{
public:
	friend class nsMsgDatabase;

	nsDBFolderInfo(nsMsgDatabase *mdb);
	virtual ~nsDBFolderInfo();

    NS_DECL_ISUPPORTS
	// interface methods.
	NS_DECL_NSIDBFOLDERINFO
	// create the appropriate table and row in a new db.
	nsresult			AddToNewMDB();
	// accessor methods.

	PRBool				AddLaterKey(nsMsgKey key, PRTime until);
	PRInt32				GetNumLatered();
	nsMsgKey			GetLateredAt(PRInt32 laterIndex, PRTime pUntil);
	void				RemoveLateredAt(PRInt32 laterIndex);

	PRBool				TestFlag(PRInt32 flags);
	PRInt16				GetIMAPHierarchySeparator() ;
	void				SetIMAPHierarchySeparator(PRInt16 hierarchySeparator) ;
	void				ChangeImapTotalPendingMessages(PRInt32 delta);
	void				ChangeImapUnreadPendingMessages(PRInt32 delta) ;
	
	nsresult			InitFromExistingDB();
	// get and set arbitrary property, aka row cell value.
	nsresult	SetPropertyWithToken(mdb_token aProperty, nsString *propertyStr);
	nsresult	SetUint32PropertyWithToken(mdb_token aProperty, PRUint32 propertyValue);
	nsresult	SetInt32PropertyWithToken(mdb_token aProperty, PRInt32 propertyValue);
	nsresult	GetPropertyWithToken(mdb_token aProperty, nsString *resultProperty);
	nsresult	GetUint32PropertyWithToken(mdb_token aProperty, PRUint32 &propertyValue, PRUint32 defaultValue = 0);
	nsresult	GetInt32PropertyWithToken(mdb_token aProperty, PRInt32 &propertyValue, PRInt32 defaultValue = 0);
        nsresult        GetConstCharPtrCharacterSet(const char**result);


	nsMsgKeyArray m_lateredKeys;		// list of latered messages

protected:
	
	// initialize from appropriate table and row in existing db.
	nsresult InitMDBInfo();
	nsresult LoadMemberVariables();

        void ReleaseExternalReferences(); // let go of any references to other objects.

	PRInt32		m_folderSize;
	PRInt32		m_expungedBytes;	// sum of size of deleted messages in folder
	PRUint32	m_folderDate;
	nsMsgKey  m_highWaterMessageKey;	// largest news article number or imap uid whose header we've seen

  // m_numVisibleMessages, m_numNewMessages and m_numMessages can never be negative. 0 means 'no msgs'.
	PRInt32		m_numVisibleMessages;	// doesn't include expunged or ignored messages (but does include collapsed).
	PRInt32		m_numNewMessages;
	PRInt32		m_numMessages;		// includes expunged and ignored messages

	PRInt32		m_flags;			// folder specific flags. This holds things like re-use thread pane,
									// configured for off-line use, use default retrieval, purge article/header options
	nsMsgKey	m_lastMessageLoaded; // set by the FE's to remember the last loaded message

	PRUint16	m_version;			// for upgrading...
	PRInt16		m_IMAPHierarchySeparator;	// imap path separator

	// mail only (for now)
	
	// IMAP only
	PRInt32		m_ImapUidValidity;
	PRInt32		m_totalPendingMessages;
	PRInt32		m_unreadPendingMessages;

	// news only (for now)
	nsMsgKey	m_expiredMark;		// Highest invalid article number in group - for expiring
// the db folder info will have to know what db and row it belongs to, since it is really
// just a wrapper around the singleton folder info row in the mdb. 
	nsMsgDatabase         *m_mdb;
	nsIMdbTable           *m_mdbTable;	// singleton table in db
	nsIMdbRow             *m_mdbRow;	// singleton row in table;

        nsCString             m_charSet;
        PRBool                m_charSetOverride;
	PRBool                m_mdbTokensInitialized;

	mdb_token			m_rowScopeToken;
	mdb_token			m_tableKindToken;
	// tokens for the pre-set columns - we cache these for speed, which may be silly
	mdb_token			m_mailboxNameColumnToken;
	mdb_token			m_numVisibleMessagesColumnToken;
	mdb_token			m_numMessagesColumnToken;
	mdb_token			m_numNewMessagesColumnToken;
	mdb_token			m_flagsColumnToken;
	mdb_token			m_lastMessageLoadedColumnToken;
	mdb_token			m_folderSizeColumnToken;
	mdb_token			m_expungedBytesColumnToken;
	mdb_token			m_folderDateColumnToken;
	mdb_token			m_highWaterMessageKeyColumnToken;

	mdb_token			m_imapUidValidityColumnToken;
	mdb_token			m_totalPendingMessagesColumnToken;
	mdb_token			m_unreadPendingMessagesColumnToken;
	mdb_token			m_expiredMarkColumnToken;
	mdb_token			m_versionColumnToken;
};

#endif