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#ifndef nsLocalUndoTxn_h__
#define nsLocalUndoTxn_h__

#include "msgCore.h"
#include "nsIMsgFolder.h"
#include "nsMailboxService.h"
#include "nsMsgTxn.h"
#include "nsMsgKeyArray.h"
#include "nsCOMPtr.h"
#include "nsIUrlListener.h"
#include "nsIWeakReference.h"

#define NS_LOCALMOVECOPYMSGTXN_IID \
{ /* 874363b4-242e-11d3-afad-001083002da8 */ \
	0x874363b4, 0x242e, 0x11d3, \
	{ 0xaf, 0xad, 0x00, 0x10, 0x83, 0x00, 0x2d, 0xa8 } }

class nsLocalUndoFolderListener;

class nsLocalMoveCopyMsgTxn : public nsMsgTxn
{
public:
    NS_DEFINE_STATIC_IID_ACCESSOR(NS_LOCALMOVECOPYMSGTXN_IID)

	nsLocalMoveCopyMsgTxn();
    nsLocalMoveCopyMsgTxn(nsIMsgFolder *srcFolder,
						  nsIMsgFolder *dstFolder,
						  PRBool isMove);
    virtual ~nsLocalMoveCopyMsgTxn();

    NS_DECL_ISUPPORTS_INHERITED

    // overloading nsITransaction methods
    NS_IMETHOD UndoTransaction(void);
    NS_IMETHOD RedoTransaction(void);

    // helper
    nsresult AddSrcKey(nsMsgKey aKey);
		nsresult AddSrcStatusOffset(PRUint32 statusOffset);
    nsresult AddDstKey(nsMsgKey aKey);
    nsresult AddDstMsgSize(PRUint32 msgSize);
    nsresult SetSrcFolder(nsIMsgFolder* srcFolder);
    nsresult GetSrcIsImap(PRBool *isImap);
    nsresult SetDstFolder(nsIMsgFolder* dstFolder);
    nsresult Init(nsIMsgFolder* srcFolder,
				  nsIMsgFolder* dstFolder,
				  PRBool isMove);
    nsresult UndoImapDeleteFlag(nsIMsgFolder* aFolder, 
                                nsMsgKeyArray& aKeyArray,
                                PRBool deleteFlag);
    nsresult UndoTransactionInternal();
  
private:
    nsWeakPtr m_srcFolder;
    nsMsgKeyArray m_srcKeyArray; // used when src is local or imap
		nsUInt32Array m_srcStatusOffsetArray; // used when src is local
    nsWeakPtr m_dstFolder;
    nsMsgKeyArray m_dstKeyArray;
    PRBool m_isMove;
    PRBool m_srcIsImap4;
    nsUInt32Array m_dstSizeArray;
    nsLocalUndoFolderListener *mUndoFolderListener;
};

class nsLocalUndoFolderListener : public nsIFolderListener
{
public:
  NS_DECL_ISUPPORTS
  NS_DECL_NSIFOLDERLISTENER

  nsLocalUndoFolderListener(nsLocalMoveCopyMsgTxn *aTxn, nsIMsgFolder *aFolder);
  virtual ~nsLocalUndoFolderListener();
 
private:
  nsLocalMoveCopyMsgTxn *mTxn;
  nsIMsgFolder *mFolder;
};

#endif
