/*
 * MultiMail offline mail reader
 * letter_header and letter_list

 Copyright (c) 1996 Toth Istvan <stoty@vma.bme.hu>
 Copyright (c) 1999 William McBrine <wmcbrine@clark.net>

 Distributed under the GNU General Public License.
 For details, see the file COPYING in the parent directory. */

#include "mmail.h"

int lsorttype;	// Outside the classes because it needs to be accessible
		// by lettercomp(), which is outside because it needs to
		// be for qsort(). :-/

// ---------------------------------------------------------------------------
// Letter header methods
// ---------------------------------------------------------------------------

letter_header::letter_header(mmail *mmA, const char *subjectA,
		const char *toA, const char *fromA, const char *dateA,
		const char *msgidA, int replyToA, int LetterIDA,
		int msgNumA, int AreaIDA, bool privatA, int lengthA,
		specific_driver *driverA, net_address &netAddrA,
		bool charsetA)
{
	dl = mmA->driverList;
	driver = driverA;
	readO = dl->getReadObject(driver);

	subject = strdupplus(subjectA);
	to = strdupplus(toA);
	from = strdupplus(fromA);
	date = strdupplus(dateA);
	msgid = strdupplus(msgidA);

	replyTo = replyToA;
	LetterID = LetterIDA;
	AreaID = AreaIDA;
	privat = privatA;
	length = lengthA;
	msgNum = msgNumA;

	netAddr = netAddrA;
	charset = charsetA;

	const char *login = mmA->resourceObject->get(LoginName);
	const char *alias = mmA->resourceObject->get(AliasName);

	personal = (!strcasecmp(to, login) || !strcasecmp(to, alias)) ||
		(!strcasecmp(from, login) || !strcasecmp(from, alias));
}

letter_header::~letter_header()
{
	delete[] subject;
	delete[] to;
	delete[] from;
	delete[] date;
}

void letter_header::changeSubject(const char *newsubj)
{
	delete[] subject;
	subject = strdupplus(newsubj);
}

void letter_header::changeTo(const char *newto)
{
	delete[] to;
	to = strdupplus(newto);
}

void letter_header::changeFrom(const char *newfrom)
{
	delete[] from;
	from = strdupplus(newfrom);
}

void letter_header::changeMsgID(const char *newmsgid)
{
	delete[] msgid;
	msgid = strdupplus(newmsgid);
}

const char *letter_header::getSubject() const
{
	return subject;
}

const char *letter_header::getTo() const
{
	return to;
}

const char *letter_header::getFrom() const
{
	return from;
}

const char *letter_header::getDate() const
{
	return date;
}

const char *letter_header::getMsgID() const
{
	return msgid;
}

int letter_header::getReplyTo() const
{
	return replyTo;
}

int letter_header::getLetterID() const
{
	return LetterID;
}

int letter_header::getAreaID() const
{
	return AreaID + dl->getOffset(driver);
}

bool letter_header::getPrivate() const
{
	return privat;
}

const char *letter_header::getBody()
{
	return driver->getBody(*this);
}

int letter_header::getLength() const
{
	return length;
}

specific_driver *letter_header::getDriver() const
{
	return driver;
}

bool letter_header::getRead()
{
	return readO->getRead(AreaID, LetterID);
}

void letter_header::setRead()
{
	readO->setRead(AreaID, LetterID, true);
}

int letter_header::getStatus()
{
	return readO->getStatus(AreaID, LetterID);
}

void letter_header::setStatus(int stat)
{
	readO->setStatus(AreaID, LetterID, stat);
}

int letter_header::getMsgNum() const
{
	return msgNum;
}

net_address &letter_header::getNetAddr()
{
	return netAddr;
}

bool letter_header::isPersonal() const
{
	return personal;
}

bool letter_header::isLatin() const
{
	return charset;
}

void letter_header::setLatin(bool charsetA)
{
	charset = charsetA;
}

// ---------------------------------------------------------------------------
// Letterlist methods
// ---------------------------------------------------------------------------

letter_list::letter_list(mmail *mmA, int areaNumberA, bool isCollA)
{
	dl = mmA->driverList;
	areaNumber = areaNumberA;
	driver = dl->getDriver(areaNumber);
	areaNumber -= dl->getOffset(driver);
	readO = dl->getReadObject(driver);
	isColl = isCollA;
	init();
}

void letter_list::init()
{
	driver->selectArea(areaNumber);
	noOfLetters = driver->getNoOfLetters();

	activeHeader = new int[noOfLetters];
	letterHeader = new letter_header *[noOfLetters];

	driver->resetLetters();
	for (int c = 0; c < noOfLetters; c++)
		letterHeader[c] = driver->getNextLetter();
	currentLetter = 0;
	shortlist = false;

	sort();
	relist();
}

letter_list::~letter_list()
{
	cleanup();
}

void letter_list::relist()
{
	int stat, c = currentLetter;
	noActive = 0;

	while (noOfLetters && !noActive) {
		shortlist = !shortlist;
		for (currentLetter = 0; currentLetter < noOfLetters;
			currentLetter++) {

			stat = getStatus();

			if (!shortlist || (!(stat & MS_READ) ||
			    (stat & MS_MARKED)))
				activeHeader[noActive++] = currentLetter;
		}
	}

	currentLetter = c;
}

void letter_list::cleanup()
{
	while (noOfLetters)
		delete letterHeader[--noOfLetters];
	delete[] letterHeader;
	delete[] activeHeader;
}

int lmsgncomp(letter_header **a, letter_header **b)
{
	return (*a)->getLetterID() - (*b)->getLetterID();
}

int lettercomp(letter_header **a, letter_header **b)
{
	const char *x, *y;
	int d, l1, l2;

	switch(lsorttype) {
	case LS_SUBJ:
		x = (*a)->getSubject();
		y = (*b)->getSubject();
		break;
	case LS_FROM:
		x = (*a)->getFrom();
		y = (*b)->getFrom();
		break;
	default:
		x = (*a)->getTo();
		y = (*b)->getTo();
	}

	l1 = strlen(x);
	l2 = strlen(y);
	if (l2 < l1)
		l1 = l2;

	d = strncasecmp(x, y, l1);
	if (!d)
		d = lmsgncomp(a, b);

	return d;
}

void letter_list::sort()
{
	if ((noOfLetters > 1) && !isColl)
		qsort(letterHeader, noOfLetters, sizeof(letter_header *),
			(lsorttype == LS_MSGNUM) ? lmsgncomp : lettercomp);
}

void letter_list::resort()
{
	lsorttype++;
	if (lsorttype == LS_TO + 1)
		lsorttype = LS_SUBJ;
	sort();

	shortlist = !shortlist;
	relist();
}

int letter_list::noOfLetter() const
{
	return noOfLetters;
}

int letter_list::noOfActive() const
{
	return noActive;
}

const char *letter_list::getSubject() const
{
	return letterHeader[currentLetter]->getSubject();
}

const char *letter_list::getFrom() const
{
	return letterHeader[currentLetter]->getFrom();
}

int letter_list::getMsgNum() const
{
	return letterHeader[currentLetter]->getMsgNum();
}

const char *letter_list::getTo() const
{
	return letterHeader[currentLetter]->getTo();
}

const char *letter_list::getDate() const
{
	return letterHeader[currentLetter]->getDate();
}

const char *letter_list::getMsgID() const
{
	return letterHeader[currentLetter]->getMsgID();
}

int letter_list::getReplyTo() const
{
	return letterHeader[currentLetter]->getReplyTo();
}

int letter_list::getAreaID() const
{
	return letterHeader[currentLetter]->getAreaID();
}

bool letter_list::getPrivate() const
{
	return letterHeader[currentLetter]->getPrivate();
}

const char *letter_list::getBody()
{
	return letterHeader[currentLetter]->getBody();
}

int letter_list::getLength() const
{
	return letterHeader[currentLetter]->getLength();
}

net_address &letter_list::getNetAddr()
{
	return letterHeader[currentLetter]->getNetAddr();
}

bool letter_list::isPersonal() const
{
	return letterHeader[currentLetter]->isPersonal();
}

bool letter_list::isLatin() const
{
	return letterHeader[currentLetter]->isLatin();
}

bool letter_list::getRead()
{
	bool read = letterHeader[currentLetter]->getRead();
	if (isColl)
		readO->setRead(areaNumber, currentLetter, read);
	return read;
}

void letter_list::setRead()
{
	if (isColl)
		readO->setRead(areaNumber, currentLetter, true);
	letterHeader[currentLetter]->setRead();
}

int letter_list::getStatus()
{
	int stat = letterHeader[currentLetter]->getStatus();
	if (isColl)
		readO->setStatus(areaNumber, currentLetter, stat);
	return stat;
}

void letter_list::setStatus(int stat)
{
	if (isColl)
		readO->setStatus(areaNumber, currentLetter, stat);
	letterHeader[currentLetter]->setStatus(stat);
}

int letter_list::getCurrent() const
{
	return currentLetter;
}

int letter_list::getActive() const
{
	int c;

	for (c = 0; c < noActive; c++)
		if (activeHeader[c] >= currentLetter)
			break;
	return c;
}

void letter_list::gotoLetter(int newLetter)
{
	if ((newLetter >= 0) && (newLetter < noOfLetters))
		currentLetter = newLetter;
}

void letter_list::gotoActive(int activeA)
{
	if ((activeA >= 0) && (activeA < noActive))
		currentLetter = activeHeader[activeA];
}

void letter_list::rrefresh()
{
	cleanup();
	init();
}

bool letter_list::findReply(int area, int msgnum)
{
	bool found = false;

	for (int x = 0; !found && (x < noOfLetters); x++) {
		found = (letterHeader[x]->getReplyTo() == msgnum) &&
			(letterHeader[x]->getAreaID() == area);
		if (found)
			currentLetter = x;
	}

	return found;
}
