//*******************************************************
// MessageFolder Object: Keeps a folder of CMessage objects
// Using the three constructors, folders can be stored either
//	1) default folder: "c:\MsgFldr
//	2) user chosen folder name in current directory
//	3) User chosen folder name in given path
// AUTHOR: Chris Wild
// DATE: July 25, 1997
//*******************************************************
#ifndef MESSAGEFOLDER_H
#define MESSAGEFOLDER_H
#include "Message.h"
#include "ListMsgs.h"
#include <windows.h>
typedef int msgID;
//typedef int bool;
const int NULL_ID = 0;
class CMsgFolder
{
public:
	
	//************* constructors and destructors
	CMsgFolder();	// default
	// opens (or creates a folder called "folderName" in current directory
	CMsgFolder(const char* folderName);
	// opens (or creates) a folder called "folderName in "path"
	CMsgFolder(const char* path, const char* folderName);
	// Writes out open messages and folder information
	~CMsgFolder();
	
	// Puts a message in the folder
	bool PostMsg(const CMessage& msg);
	
	// PRE: message with "messageID" exists
	// gets message with ID "messageId"
	CMessage GetMsg(msgID messageId) const;
	
	// PRE: message with "messageID" exists
	// topic points to a string big enough to hold topic string
	// POST: if exists, returns true and topic of this message
	//	else returns false
	bool GetMsgTopic(msgID messageId, char* topic) const;
	
	// PRE: message with "messageID" exists
	// POST: deletes this message (renumbering messages)
	bool DeleteMsg(msgID messageID);
	
	// POST: returns the number of messages in this folder
	int NumMsgs() const;

	// POST: Closes this folder making it undefined
	// returns false if problem closing folder else true
	bool CloseMsgFolder();

	// POST: Open folder with "folderName"
	// returns true is opened successfully else false
	bool OpenMsgFolder(const char* folderName);
private:
	char* folderName;
	HANDLE messages; // handle to open message folder
	CListMsgs msgList;	// list of available messages
	int nextMsgNum;	// unique number for next message
	bool verifyFolder(const char*); // opens(creates) message folder
};

#endif