/* $Id: board.c,v 1.93 2003/03/26 11:38:04 victor Exp $ */
#include "bbs.h"
#define BRC_STRLEN 15		/* Length of board name */
#define BRC_MAXSIZE     24576
#define BRC_ITEMSIZE    (BRC_STRLEN + 1 + BRC_MAXNUM * sizeof( int ))
#define BRC_MAXNUM      80

static char    *
brc_getrecord(char *ptr, char *name, int *pnum, int *list)
{
    int             num;
    char           *tmp;

    strncpy(name, ptr, BRC_STRLEN);
    ptr += BRC_STRLEN;
    num = (*ptr++) & 0xff;
    tmp = ptr + num * sizeof(int);
    if (num > BRC_MAXNUM)
	num = BRC_MAXNUM;
    *pnum = num;
    memcpy(list, ptr, num * sizeof(int));
    return tmp;
}

static time_t   brc_expire_time;

static char    *
brc_putrecord(char *ptr, char *name, int num, int *list)
{
    if (num > 0 && list[0] > brc_expire_time) {
	if (num > BRC_MAXNUM)
	    num = BRC_MAXNUM;

	while (num > 1 && list[num - 1] < brc_expire_time)
	    num--;

	strncpy(ptr, name, BRC_STRLEN);
	ptr += BRC_STRLEN;
	*ptr++ = num;
	memcpy(ptr, list, num * sizeof(int));
	ptr += num * sizeof(int);
    }
    return ptr;
}

static int      brc_changed = 0;
static char     brc_buf[BRC_MAXSIZE];
static char     brc_name[BRC_STRLEN];
static char    *fn_boardrc = ".boardrc";
static int      brc_size;
char *brc_buf_addr=brc_buf;

void
brc_update()
{
    if (brc_changed && cuser.userlevel) {
	char            dirfile[STRLEN], *ptr;
	char            tmp_buf[BRC_MAXSIZE - BRC_ITEMSIZE], *tmp;
	char            tmp_name[BRC_STRLEN];
	int             tmp_list[BRC_MAXNUM], tmp_num;
	int             fd, tmp_size;

	ptr = brc_buf;
	if (brc_num > 0)
	    ptr = brc_putrecord(ptr, brc_name, brc_num, brc_list);

	setuserfile(dirfile, fn_boardrc);
	if ((fd = open(dirfile, O_RDONLY)) != -1) {
	    tmp_size = read(fd, tmp_buf, sizeof(tmp_buf));
	    close(fd);
	} else {
	    tmp_size = 0;
	}

	tmp = tmp_buf;
	while (tmp < &tmp_buf[tmp_size] && (*tmp >= ' ' && *tmp <= 'z')) {
	    tmp = brc_getrecord(tmp, tmp_name, &tmp_num, tmp_list);
	    if (strncmp(tmp_name, currboard, BRC_STRLEN))
		ptr = brc_putrecord(ptr, tmp_name, tmp_num, tmp_list);
	}
	brc_size = (int)(ptr - brc_buf);

	if ((fd = open(dirfile, O_WRONLY | O_CREAT, 0644)) != -1) {
	    ftruncate(fd, 0);
	    write(fd, brc_buf, brc_size);
	    close(fd);
	}
	brc_changed = 0;
    }
}

static void
read_brc_buf()
{
    char            dirfile[STRLEN];
    int             fd;

    if (brc_buf[0] == '\0') {
	setuserfile(dirfile, fn_boardrc);
	if ((fd = open(dirfile, O_RDONLY)) != -1) {
	    brc_size = read(fd, brc_buf, sizeof(brc_buf));
	    close(fd);
	} else {
	    brc_size = 0;
	}
    }
}

int
brc_initial(char *boardname)
{
    char           *ptr;
    if (strcmp(currboard, boardname) == 0) {
	return brc_num;
    }
    brc_update();
    strlcpy(currboard, boardname, sizeof(currboard));
    currbid = getbnum(currboard);
    currbrdattr = bcache[currbid - 1].brdattr;
    read_brc_buf();

    ptr = brc_buf;
    while (ptr < &brc_buf[brc_size] && (*ptr >= ' ' && *ptr <= 'z')) {
	ptr = brc_getrecord(ptr, brc_name, &brc_num, brc_list);
	if (strncmp(brc_name, currboard, BRC_STRLEN) == 0)
	    return brc_num;
    }
    strncpy(brc_name, boardname, BRC_STRLEN);
    brc_num = brc_list[0] = 1;
    return 0;
}

void
brc_addlist(char *fname)
{
    int             ftime, n, i;

    if (!cuser.userlevel)
	return;

    ftime = atoi(&fname[2]);
    if (ftime <= brc_expire_time
	 /* || fname[0] != 'M' || fname[1] != '.' */ ) {
	return;
    }
    if (brc_num <= 0) {
	brc_list[brc_num++] = ftime;
	brc_changed = 1;
	return;
    }
    if ((brc_num == 1) && (ftime < brc_list[0]))
	return;
    for (n = 0; n < brc_num; n++) {
	if (ftime == brc_list[n]) {
	    return;
	} else if (ftime > brc_list[n]) {
	    if (brc_num < BRC_MAXNUM)
		brc_num++;
	    for (i = brc_num - 1; --i >= n; brc_list[i + 1] = brc_list[i]);
	    brc_list[n] = ftime;
	    brc_changed = 1;
	    return;
	}
    }
    if (brc_num < BRC_MAXNUM) {
	brc_list[brc_num++] = ftime;
	brc_changed = 1;
    }
}

static int
brc_unread_time(time_t ftime, int bnum, int *blist)
{
    int             n;

    if (ftime <= brc_expire_time)
	return 0;

    if (brc_num <= 0)
	return 1;
    for (n = 0; n < bnum; n++) {
	if (ftime > blist[n])
	    return 1;
	else if (ftime == blist[n])
	    return 0;
    }
    return 0;
}

int
brc_unread(char *fname, int bnum, int *blist)
{
    int             ftime, n;

    ftime = atoi(&fname[2]);

    if (ftime <= brc_expire_time)
	return 0;

    if (brc_num <= 0)
	return 1;
    for (n = 0; n < bnum; n++) {
	if (ftime > blist[n])
	    return 1;
	else if (ftime == blist[n])
	    return 0;
    }
    return 0;
}

#define BRD_UNREAD 1
#define BRD_FAV    2
#define BRD_LINE   4
#define BRD_TAG    8

#define FAVNB      ".favnb"
#define B_TOTAL(bptr)        (SHM->total[(bptr)->bid - 1])
#define B_LASTPOSTTIME(bptr) (SHM->lastposttime[(bptr)->bid - 1])
#define B_BH(bptr)           (&bcache[(bptr)->bid - 1])
typedef struct {
    int             bid;
    unsigned char   myattr;
} __attribute__ ((packed)) boardstat_t;

typedef struct {
    short           bid;
    char            attr;
    time_t          lastvisit;
} fav_board_t;

typedef struct {
#ifdef MEM_CHECK
    int             memcheck;
#endif
    short           nDatas;
    short           nAllocs;
    char            nLines;
    fav_board_t  b[0];
} fav_t;
    
static boardstat_t *nbrd = NULL;
char   favchange = 0, choose_board_depth = 0;
fav_t *fav;
static short    brdnum;
static char     yank_flag = 1;

int cmpfav(const void *a, const void *b)
{
    if( *(short *)a > ((fav_board_t *)b)->bid )
	return 1;
    else if( *(short *)a == ((fav_board_t *)b)->bid )
	return 0;
    return -1;
}

fav_board_t *getfav(short bid)
{
    int i;
    for(i = 0; i < fav->nDatas; i++)
	if(fav->b[i].bid == bid)
	    break;
    return i == fav->nDatas ? NULL : &fav->b[i];
}

char getfavattr(short bid)
{
    fav_board_t *ptr = getfav(bid);
    if( ptr == NULL )
	return 0; // default here
    else
	return ptr->attr;
}

time_t getfavtime(short bid)
{
    fav_board_t *ptr = getfav(bid);
    if( ptr == NULL )
	return login_start_time; // default here
    else
	return ptr->lastvisit;
}

void movefav(int old, int new)
{
    boardstat_t tmp;
    fav_board_t *des, *src, *ptr1, *ptr2, t;

    if( !(src = getfav(nbrd[old].bid)) || !(des = getfav(nbrd[new].bid)) )
	return;
    
    t = *src;
    tmp = nbrd[old];
    if(new < old){
	for(ptr1 = ptr2 = src; ptr1 > des && ptr2 > des; ptr1--)
	    if(ptr1->attr & BRD_FAV){
		*ptr2 = *(ptr1 - 1);
		ptr2--;
		while(ptr2 > des && !(ptr2->attr & BRD_FAV))
		    ptr2--;
	    }
	for( ; old > new; old--)
	   nbrd[old] = nbrd[old - 1]; 
    }
    else{
	for(ptr1 = ptr2 = src; ptr1 < des && ptr2 < des; ptr1++)
	    if(ptr1->attr & BRD_FAV){
		*ptr2 = *(ptr1 + 1);
		ptr2++;
		while(ptr2 < des && !(ptr2->attr & BRD_FAV))
		    ptr2++;
	    }
	for( ; old < new; old++)
	   nbrd[old] = nbrd[old + 1]; 
    }
    nbrd[new] = tmp;
    *des = t;
}

void delfavline(int bid, int num)
{
    int i;

    movefav(num, --brdnum);
    fav->nLines++;
    fav->nDatas--;

    for(i = 0; i < fav->nDatas; i++)
	if(fav->b[i].bid < bid)
	    fav->b[i].bid++;
    for(i = 0; i < brdnum; i++)
	if(nbrd[i].bid < bid)
	    nbrd[i].bid++;
}

void setfav(short bid, char attr, char mode, time_t t)
{
    /* mode: 0: 設成 off, 1: 設成 on, 2: 反相 */
    fav_board_t *ptr = getfav(bid);
    if( ptr != NULL ){
	if( mode == 2 )
	    ptr->attr ^= attr;
	else if( mode )
	    ptr->attr |= attr;
	else
	    ptr->attr &= ~attr;
	if( t )
	    ptr->lastvisit = t;
    }
    else{
	int     where;
	if( fav->nDatas == fav->nAllocs ){
#ifdef DEBUG
	    vmsg("realloc fav");
#endif
	    fav = realloc(fav,
		    sizeof(fav_t) +
		    sizeof(fav_board_t) *
		    (16 + fav->nAllocs));
	    fav->nAllocs += 16;
	}

	// insertion sort:
	if(!(attr & BRD_LINE)){
	    for( where = 0 ; where < fav->nDatas ; ++where )
		if( fav->b[where].bid > bid )
		    break;
	    if( where != fav->nDatas ){
		int     i;
		for( i = fav->nDatas - 1 ; i >= where ; --i )
		    fav->b[i + 1] = fav->b[i];
	    }

	    fav->b[where].bid = bid ;
	    fav->b[where].attr = mode ? attr : 0;
	}
	else{
	    where = fav->nDatas;
	    fav->b[where].bid = --(fav->nLines);
	    fav->b[where].attr = attr;
	}
	
	fav->b[where].lastvisit = t ? t : login_start_time;
	fav->nDatas++;
    }
}

void imovefav(int old)
{
    char buf[5];
    int new;
    
    getdata(b_lines - 1, 0, "請輸入新次序:", buf, sizeof(buf), DOECHO);
    new = atoi(buf) - 1;
    if (new < 0 || brdnum <= new){
	vmsg("輸入範圍有誤!");
	return;
    }
    movefav(old, new);
}

#define BRD_OLD 0
#define BRD_NEW 1
#define BRD_END 2

void updatenewfav(int mode)
{
    /* mode: 0: don't write to fav  1: write to fav */
    int i, fd;
    char fname[80], *brd;

    if(!(cuser.uflag2 & FAVNEW_FLAG))
	return;

    setuserfile(fname, FAVNB);

    if( (fd = open(fname, O_RDWR, 0600)) != -1 ){

	brd = (char *)malloc((numboards + 1) * sizeof(char));
	read(fd, brd, (numboards + 1) * sizeof(char));
	
	for(i = 0; i < numboards && brd[i] != BRD_END; i++){
	    if(brd[i] == BRD_NEW && Ben_Perm(&bcache[i])){
		if(mode)
		    setfav(i + 1, BRD_FAV, 1, 0);
		brd[i] = BRD_OLD;
	    }
	}
	if( i != numboards )
	    for(i-- ; i < numboards; i++){
		if(Ben_Perm(&bcache[i])){
		    if(mode)
			setfav(i + 1, BRD_FAV, 1, 0);
		    brd[i] = BRD_OLD;
		}
		else
		    brd[i] = BRD_NEW;
	    }

	brd[i] = BRD_END;
	
	lseek(fd, 0, SEEK_SET);
	write(fd, brd, (numboards + 1 ) * sizeof(char));
	free(brd);
	close(fd);
    }
}

void load_brdbuf(void)
{
    static  char    firsttime = 1;
    int     fd, r, w;
    char    fname[80];

    setuserfile(fname, ".fav3");
    if( (fd = open(fname, O_RDONLY)) == -1 ){
	// not found.
	int i;
	char favrec;
	fav = (fav_t *)malloc(sizeof(fav_t) +
				    sizeof(fav_board_t) * 16);
	fav->nDatas = 0;
	fav->nAllocs = 16;
	fav->nLines = 0;
	favchange = 1;

	setuserfile(fname, ".fav2");

	if( (fd = open(fname, O_RDONLY)) != -1 ){
	    for( i = 1; i <= numboards; i++){
		if(read(fd, &favrec, sizeof(char)) < 0)
		    break;
		if( (favrec & BRD_FAV) )
		    setfav(i, BRD_FAV, 1, 0);
	    }
	    close(fd);
	}
    }
    else{
	short   nDatas;
	char    nLines;
	read(fd, &nDatas, sizeof(nDatas));
	read(fd, &nLines, sizeof(nLines));
	fav = (fav_t *)malloc(sizeof(fav_t) +
				    sizeof(fav_board_t) * (nDatas + 16));
	fav->nDatas = nDatas;
	fav->nAllocs = nDatas + 16;
	fav->nLines = nLines;
	read(fd, fav->b, sizeof(fav_board_t) * nDatas);
	close(fd);
    }

    // check if fav is correct
    for( r = w = 0 ; r < fav->nDatas ; ++r )
	if( fav->b[r].attr & BRD_FAV )                 // 須是 BRD_FAV
	    if( (fav->b[r].bid < 0) ||                 // 分隔線
		(fav->b[r].bid > 0 &&                  // bid > 0 且該看板存在
		 bcache[fav->b[r].bid - 1].brdname[0]) )
		fav->b[w++] = fav->b[r];
    fav->nDatas = w;

    updatenewfav(1);
#ifdef MEM_CHECK
	fav->memcheck = MEM_CHECK;
#endif
    firsttime = 0;
}

void
init_brdbuf()
{
    brc_expire_time = login_start_time - 365 * 86400;
}

void
save_brdbuf(void)
{
    int     r, w, fd;
    char    fname[80];
    if( !fav )
	return;
    /*
      favchange is not implement yet 
      if( !favchange )
          return;
    */
#ifdef MEM_CHECK
    if( fav->memcheck != MEM_CHECK )
	return;
#endif

    for( r = w = 0 ; r < fav->nDatas ; ++r )
	if( fav->b[r].attr & BRD_FAV && bcache[fav->b[r].bid - 1].brdname[0])
	    fav->b[w++] = fav->b[r];
    fav->nDatas = w;
    setuserfile(fname, ".fav3");
    if( (fd = open(fname, O_WRONLY | O_CREAT, 0600)) != -1 ){
	int i;
	write(fd, &fav->nDatas, sizeof(short));
	write(fd, &fav->nLines, sizeof(char));
	for(i = 0; i < fav->nDatas; i++)
	    if(fav->b[i].attr & BRD_FAV)
		write(fd, &fav->b[i], sizeof(fav_board_t));
	close(fd);
    }
    free(fav);
    fav = NULL;
}

int
Ben_Perm(boardheader_t * bptr)
{
    register int    level, brdattr;
    register char  *ptr;

    level = bptr->level;
    brdattr = bptr->brdattr;

    if (HAS_PERM(PERM_SYSOP))
	return 1;

    ptr = bptr->BM;
    if (is_BM(ptr))
	return 1;

    /* 祕密看板：核對首席板主的好友名單 */

    if (brdattr & BRD_HIDE) {	/* 隱藏 */
	if (hbflcheck((int)(bptr - bcache) + 1, currutmp->uid)) {
	    if (brdattr & BRD_POSTMASK)
		return 0;
	    else
		return 2;
	} else
	    return 1;
    }
    /* 限制閱讀權限 */
    if (level && !(brdattr & BRD_POSTMASK) && !HAS_PERM(level))
	return 0;

    return 1;
}

#if 0
static int
have_author(char *brdname)
{
    char            dirname[100];

    snprintf(dirname, sizeof(dirname),
	     "正在搜尋作者[33m%s[m 看板:[1;33m%s[0m.....",
	     currauthor, brdname);
    move(b_lines, 0);
    clrtoeol();
    outs(dirname);
    refresh();

    setbdir(dirname, brdname);
    str_lower(currowner, currauthor);

    return search_rec(dirname, cmpfowner);
}
#endif

static int
check_newpost(boardstat_t * ptr)
{				/* Ptt 改 */
    int             tbrc_list[BRC_MAXNUM], tbrc_num;
    char            bname[BRC_STRLEN];
    char           *po;
    time_t          ftime;

    ptr->myattr &= ~BRD_UNREAD;
    if (B_BH(ptr)->brdattr & BRD_GROUPBOARD)
	return 0;

    if (B_TOTAL(ptr) == 0)
	setbtotal(ptr->bid);
    if (B_TOTAL(ptr) == 0)
	return 0;
    ftime = B_LASTPOSTTIME(ptr);
    read_brc_buf();
    po = brc_buf;
    while (po < &brc_buf[brc_size] && (*po >= ' ' && *po <= 'z')) {
	po = brc_getrecord(po, bname, &tbrc_num, tbrc_list);
	if (strncmp(bname, B_BH(ptr)->brdname, BRC_STRLEN) == 0) {
	    if (brc_unread_time(ftime, tbrc_num, tbrc_list)) {
		ptr->myattr |= BRD_UNREAD;
	    }
	    return 1;
	}
    }

    ptr->myattr |= BRD_UNREAD;
    return 1;
}

static void
load_uidofgid(const int gid, const int type)
{
    boardheader_t  *bptr, *currbptr;
    int             n, childcount = 0;
    currbptr = &bcache[gid - 1];
    for (n = 0; n < numboards; ++n) {
	bptr = SHM->bsorted[type][n];
	if (bptr->brdname[0] == '\0')
	    continue;
	if (bptr->gid == gid) {
	    if (currbptr == &bcache[gid - 1])
		currbptr->firstchild[type] = bptr;
	    else {
		currbptr->next[type] = bptr;
		currbptr->parent = &bcache[gid - 1];
	    }
	    childcount++;
	    currbptr = bptr;
	}
    }
    bcache[gid - 1].childcount = childcount;
    if (currbptr == &bcache[gid - 1])
	currbptr->firstchild[type] = (boardheader_t *) ~ 0;
    else
	currbptr->next[type] = (boardheader_t *) ~ 0;
}
static boardstat_t *
addnewbrdstat(int n, int state)
{
    boardstat_t    *ptr;

    ptr = &nbrd[brdnum++];
    //boardheader_t  *bptr = &bcache[n];
    //ptr->total = &(SHM->total[n]);
    //ptr->lastposttime = &(SHM->lastposttime[n]);
    
    ptr->bid = n + 1;
    ptr->myattr = getfavattr(ptr->bid);
    if ((B_BH(ptr)->brdattr & BRD_HIDE) && state == 1)
	B_BH(ptr)->brdattr |= BRD_POSTMASK;
    check_newpost(ptr);
    return ptr;
}

static int
cmpboardfriends(const void *brd, const void *tmp)
{
    return ((B_BH((boardstat_t*)tmp)->nuser) -
	    (B_BH((boardstat_t*)brd)->nuser));
}

static int
favcmpboardname(const void *brd, const void *tmp)
{
    int     b1 = ((fav_board_t *)brd)->bid;
    int     b2 = ((fav_board_t *)tmp)->bid;

    if( b1 <= 0 || b2 <= 0 ) // 分隔線
	return 1;

    return strcasecmp(bcache[b1 - 1].brdname, bcache[b2 - 1].brdname);
}

static int
favcmpboardclass(const void *brd, const void *tmp)
{
    int     b1 = ((fav_board_t *)brd)->bid;
    int     b2 = ((fav_board_t *)tmp)->bid;
    int     cmp;

    if( b1 <= 0 || b2 <= 0 ) // 分隔線
	return 1;

    cmp = strncasecmp(bcache[b1 - 1].title, bcache[b2 - 1].title, 4);
    if( cmp )
	return cmp;
    else
	return strcasecmp(bcache[b1 - 1].brdname, bcache[b2 - 1].brdname);
}

static void
load_boards(char *key)
{
    boardheader_t  *bptr = NULL;
    int             type = cuser.uflag & BRDSORT_FLAG ? 1 : 0;
    int             i, n;
    int             state;
#ifdef CRITICAL_MEMORY
    boardstat_t    *tmpnbrd;
#endif

    if (class_bid > 0) {
	bptr = &bcache[class_bid - 1];
	if (bptr->firstchild[type] == NULL || bptr->childcount <= 0)
	    load_uidofgid(class_bid, type);
    }
    brdnum = 0;
    if (nbrd) {
        free(nbrd);
	nbrd = NULL;
    }
    if (class_bid <= 0) {
	nbrd = (boardstat_t *) MALLOC(sizeof(boardstat_t) * numboards);
	if( yank_flag == 0 ){ // fav mode
	    for( i = 0 ; i < fav->nDatas ; ++i ){
		if( fav->b[i].attr & (BRD_FAV | BRD_LINE) )
		    addnewbrdstat(fav->b[i].bid - 1, BRD_LINE);
		else if (fav->b[i].attr & BRD_FAV && (state = Ben_Perm( (bptr = &bcache[ fav->b[i].bid - 1 ]))))
		    addnewbrdstat(fav->b[i].bid - 1, state);
	    }
	}
	else{ // general case
	    for (i = 0; i < numboards; i++) {
		if ((bptr = SHM->bsorted[type][i]) == NULL)
		    continue;
		n = (int)(bptr - bcache);
		if (!bptr->brdname[0] ||
			(bptr->brdattr & BRD_GROUPBOARD) ||
			!((state = Ben_Perm(bptr)) || (currmode & MODE_MENU)) ||
			(key[0] && !strcasestr(bptr->title, key)) ||
			(class_bid == -1 && bptr->nuser < 5))
		    continue;
		addnewbrdstat(n, state);
	    }
	}
	if (class_bid == -1)
	    qsort(nbrd, brdnum, sizeof(boardstat_t), cmpboardfriends);

    } else {
	nbrd = (boardstat_t *) MALLOC(bptr->childcount * sizeof(boardstat_t));
#if 1
	for (bptr = bptr->firstchild[type]; bptr != (boardheader_t *) ~ 0;
	     bptr = bptr->next[type]) {
	    n = (int)(bptr - bcache);
	    if (!((state = Ben_Perm(bptr)) || (currmode & MODE_MENU))
		|| (yank_flag == 0 && !(getfavattr(n) & BRD_FAV)) ||
		(key[0] && !strcasestr(bptr->title, key)))
		continue;
	    addnewbrdstat(n, state);
	}
#endif
    }
#ifndef CRITICAL_MEMORY
    nbrd = realloc(nbrd, sizeof(boardstat_t) * brdnum);
#else
    tmpnbrd = (boardstat_t *) malloc(sizeof(boardstat_t) * brdnum);
    memcpy(tmpnbrd, nbrd, sizeof(boardstat_t) * brdnum);
    FREE(nbrd);
    nbrd = tmpnbrd;
#endif
}

static int
search_board()
{
    int             num;
    char            genbuf[IDLEN + 2];
    move(0, 0);
    clrtoeol();
    CreateNameList();
    for (num = 0; num < brdnum; num++)
	AddNameList(B_BH(&nbrd[num])->brdname);
    namecomplete(MSG_SELECT_BOARD, genbuf);
    FreeNameList();
    toplev = NULL;

    for (num = 0; num < brdnum; num++)
	if (!strcasecmp(B_BH(&nbrd[num])->brdname, genbuf))
	    return num;
    return -1;
}

static int
unread_position(char *dirfile, boardstat_t * ptr)
{
    fileheader_t    fh;
    char            fname[FNLEN];
    register int    num, fd, step, total;

    total = B_TOTAL(ptr);
    num = total + 1;
    if ((ptr->myattr & BRD_UNREAD) && (fd = open(dirfile, O_RDWR)) > 0) {
	if (!brc_initial(B_BH(ptr)->brdname)) {
	    num = 1;
	} else {
	    num = total - 1;
	    step = 4;
	    while (num > 0) {
		lseek(fd, (off_t) (num * sizeof(fh)), SEEK_SET);
		if (read(fd, fname, FNLEN) <= 0 ||
		    !brc_unread(fname, brc_num, brc_list))
		    break;
		num -= step;
		if (step < 32)
		    step += step >> 1;
	    }
	    if (num < 0)
		num = 0;
	    while (num < total) {
		lseek(fd, (off_t) (num * sizeof(fh)), SEEK_SET);
		if (read(fd, fname, FNLEN) <= 0 ||
		    brc_unread(fname, brc_num, brc_list))
		    break;
		num++;
	    }
	}
	close(fd);
    }
    if (num < 0)
	num = 0;
    return num;
}

static void
brdlist_foot()
{
    prints("\033[34;46m  選擇看板  \033[31;47m  (c)\033[30m新文章模式  "
	   "\033[31m(v/V)\033[30m標記已讀/未讀  \033[31m(y)\033[30m篩選%s"
	   "  \033[31m(z)\033[30m切換選擇  \033[m",
	   yank_flag == 0 ? "最愛" : yank_flag == 1 ? "部份" : "全部");
}

static void
show_brdlist(int head, int clsflag, int newflag)
{
    int             myrow = 2;
    if (class_bid == 1) {
	currstat = CLASS;
	myrow = 6;
	showtitle("分類看板", BBSName);
	movie(0);
	move(1, 0);
	outs(
	    "                                                              "
	    "◣  ╭—\033[33m●\n"
	    "                                                    ╬—  \033[m "
	    "◢█\033[47m⊙\033[40m██◣╤\n"
	    "  \033[44m   ︿︿︿︿︿︿︿︿                               "
	    "\033[33m║\033[m\033[44m ◣◢███▼▼▼║ \033[m\n"
	    "  \033[44m                                                  "
	    "\033[33m  \033[m\033[44m ◤◥███▲▲▲ ║\033[m\n"
	    "                                  ︿︿︿︿︿︿︿︿    \033[33m"
	    "│\033[m   ◥████◤ ║\n"
	    "                                                      \033[33m╫"
	    "——\033[m  ◤      —＋\033[m");
    } else if (clsflag) {
	showtitle("看板列表", BBSName);
	prints("[←]主選單 [→]閱\讀 [↑↓]選擇 [y]載入 [S]排序 [/]搜尋 "
	       "[TAB]文摘‧看板 [h]求助\n"
	       "\033[7m%-20s 類別 轉信%-31s人氣 板    主     \033[m",
	       newflag ? "總數 未讀 看  板" : "  編號  看  板",
	       "  中   文   敘   述");
	move(b_lines, 0);
	brdlist_foot();
    }
    if (brdnum > 0) {
	boardstat_t    *ptr;
	char    *color[8] = {"", "\033[32m",
	    "\033[33m", "\033[36m", "\033[34m", "\033[1m",
	"\033[1;32m", "\033[1;33m"};
	char    *unread[2] = {"\33[37m  \033[m", "\033[1;31mˇ\033[m"};

	while (++myrow < b_lines) {
	    move(myrow, 0);
	    clrtoeol();
	    if (head < brdnum) {
		ptr = &nbrd[head++];
		if(ptr->myattr & BRD_LINE){
		    prints("%5d   ------------      ------------------------------------------", head, ptr->bid);
		    continue;
		}
		if (class_bid == 1)
		    prints("          ");
		if (!newflag) {
		    prints("%5d%c%s", head,
			   !(B_BH(ptr)->brdattr & BRD_HIDE) ? ' ' :
			   (B_BH(ptr)->brdattr & BRD_POSTMASK) ? ')' : '-',
			   (ptr->myattr & BRD_TAG) ? "D " :
			   (B_BH(ptr)->brdattr & BRD_GROUPBOARD) ? "  " :
			   unread[ptr->myattr & BRD_UNREAD]);
		} else {
		    if (newflag) {
			if ((B_BH(ptr)->brdattr & BRD_GROUPBOARD))
			    prints("        ");
			else
			    prints("%6d%s", (int)(B_TOTAL(ptr)),
				    unread[ptr->myattr & BRD_UNREAD]);
		    }
		}
		if (class_bid != 1) {
		    prints("%s%-13s\033[m%s%5.5s\033[0;37m%2.2s\033[m"
			    "%-34.34s",
			    (ptr->myattr & BRD_FAV) ? "\033[1;36m" : "",
			    B_BH(ptr)->brdname,
			    color[(unsigned int)
			    (B_BH(ptr)->title[1] + B_BH(ptr)->title[2] +
			     B_BH(ptr)->title[3] + B_BH(ptr)->title[0]) & 07],
			    B_BH(ptr)->title, B_BH(ptr)->title + 5, B_BH(ptr)->title + 7);

		    if (B_BH(ptr)->brdattr & BRD_BAD)
			prints(" X ");
		    else if (B_BH(ptr)->nuser >= 100)
			prints("\033[1mHOT\033[m");
		    else if (B_BH(ptr)->nuser > 50)
			prints("\033[1;31m%2d\033[m ", B_BH(ptr)->nuser);
		    else if (B_BH(ptr)->nuser > 10)
			prints("\033[1;33m%2d\033[m ", B_BH(ptr)->nuser);
		    else if (B_BH(ptr)->nuser > 0)
			prints("%2d ", B_BH(ptr)->nuser);
		    else
			prints(" %c ", B_BH(ptr)->bvote ? 'V' : ' ');
		    prints("%.*s\033[K", t_columns - 67, B_BH(ptr)->BM);
		} else {
		    prints("%-40.40s %.*s", B_BH(ptr)->title + 7,
			   t_columns - 67, B_BH(ptr)->BM);
		}
	    }
	    clrtoeol();
	}
    }
}

static char    *choosebrdhelp[] = {
    "\0看板選單輔助說明",
    "\01基本指令",
    "(p)(↑)/(n)(↓)上一個看板 / 下一個看板",
    "(P)(^B)(PgUp)  上一頁看板",
    "(N)(^F)(PgDn)  下一頁看板",
    "($)/(s)/(/)    最後一個看板 / 搜尋看板 / 以中文搜尋看板關鍵字",
    "(數字)         跳至該項目",
    "\01進階指令",
    "(^W)           迷路了 我在哪裡",
    "(r)(→)(Rtn)   進入多功\能閱\讀選單",
    "(q)(←)        回到主選單",
    "(y/Z)          我的最愛,訂閱\看板,所有看板/訂閱\新開看板",
    "(L)            加入分隔線至我的最愛",
    "(v/V)          通通看完/全部未讀",
    "(S)            按照字母/分類排序/自訂順序(我的最愛裡)",
    "(t/^T/^A/^D)   標記看板/取消所有標記/ 將已標記者加入/移出我的最愛",
    "(m/M)          把看板加入或移出我的最愛,移除分隔線/搬移我的最愛",
    "\01小組長指令",
    "(E/W/B)        設定看板/設定小組備忘/開新看板",
    "(^P)           移動已標記看板到此分類",
    NULL
};


static void
set_menu_BM(char *BM)
{
    if (HAS_PERM(PERM_ALLBOARD) || is_BM(BM)) {
	currmode |= MODE_MENU;
	cuser.userlevel |= PERM_SYSSUBOP;
    }
}

static char    *privateboard =
"\n\n\n\n         對不起 此板目前只准看板好友進入  請先向板主申請入境許\可";

static void
choose_board(int newflag)
{
    static int      num = 0;
    boardstat_t    *ptr;
    int             head = -1, ch = 0, currmodetmp, tmp, tmp1, bidtmp;
    char            keyword[13] = "";

    setutmpmode(newflag ? READNEW : READBRD);
    if( fav == NULL )
	load_brdbuf();
    ++choose_board_depth;
    brdnum = 0;
    if (!cuser.userlevel)	/* guest yank all boards */
	yank_flag = 2;

    do {
	if (brdnum <= 0) {
	    load_boards(keyword);
	    if (brdnum <= 0) {
		if (keyword[0] != 0) {
		    mprints(b_lines - 1, 0, "沒有任何看板標題有此關鍵字 "
			    "(板主應注意看板標題命名)");
		    pressanykey();
		    keyword[0] = 0;
		    brdnum = -1;
		    continue;
		}
		if (yank_flag < 2) {
		    brdnum = -1;
		    yank_flag++;
		    continue;
		}
		if (HAS_PERM(PERM_SYSOP) || (currmode & MODE_MENU)) {
		    if (m_newbrd(0) == -1)
			break;
		    brdnum = -1;
		    continue;
		} else
		    break;
	    }
	    head = -1;
	}
	if (num < 0)
	    num = 0;
	else if (num >= brdnum)
	    num = brdnum - 1;

	if (head < 0) {
	    if (newflag) {
		tmp = num;
		while (num < brdnum) {
		    ptr = &nbrd[num];
		    if (ptr->myattr & BRD_UNREAD)
			break;
		    num++;
		}
		if (num >= brdnum)
		    num = tmp;
	    }
	    head = (num / p_lines) * p_lines;
	    show_brdlist(head, 1, newflag);
	} else if (num < head || num >= head + p_lines) {
	    head = (num / p_lines) * p_lines;
	    show_brdlist(head, 0, newflag);
	}
	if (class_bid == 1)
	    ch = cursor_key(7 + num - head, 10);
	else
	    ch = cursor_key(3 + num - head, 0);

	switch (ch) {
	case Ctrl('W'):
	    whereami(0, NULL, NULL);
	    head = -1;
	    break;
	case 'e':
	case KEY_LEFT:
	case EOF:
	    ch = 'q';
	case 'q':
	    if (keyword[0]) {
		keyword[0] = 0;
		brdnum = -1;
		ch = ' ';
	    }
	    break;
	case 'c':
	    show_brdlist(head, 1, newflag ^= 1);
	    break;
	case KEY_PGUP:
	case 'P':
	case 'b':
	case Ctrl('B'):
	    if (num) {
		num -= p_lines;
		break;
	    }
	case KEY_END:
	case '$':
	    num = brdnum - 1;
	    break;
	case ' ':
	case KEY_PGDN:
	case 'N':
	case Ctrl('F'):
	    if (num == brdnum - 1)
		num = 0;
	    else
		num += p_lines;
	    break;
	case Ctrl('C'):
	    cal();
	    show_brdlist(head, 1, newflag);
	    break;
	case Ctrl('I'):
	    t_idle();
	    show_brdlist(head, 1, newflag);
	    break;
	case KEY_UP:
	case 'p':
	case 'k':
	    if (num-- <= 0)
		num = brdnum - 1;
	    break;
	case 't':
#if 1
	    ptr = &nbrd[num];
	    favchange = 1;
	    setfav(ptr->bid, BRD_TAG, 2, 0);
	    ptr->myattr ^= BRD_TAG;
	    head = 9999;
#endif
	case KEY_DOWN:
	case 'n':
	case 'j':
	    if (++num < brdnum)
		break;
	case '0':
	case KEY_HOME:
	    num = 0;
	    break;
	case '1':
	case '2':
	case '3':
	case '4':
	case '5':
	case '6':
	case '7':
	case '8':
	case '9':
	    if ((tmp = search_num(ch, brdnum)) >= 0)
		num = tmp;
	    brdlist_foot();
	    break;
	case 'F':
	case 'f':
	    if (class_bid>0 && HAS_PERM(PERM_SYSOP)) {
		bcache[class_bid - 1].firstchild[cuser.uflag & BRDSORT_FLAG ? 1 : 0]
		    = NULL;
		brdnum = -1;
	    }
	    break;
	case 'h':
	    show_help(choosebrdhelp);
	    show_brdlist(head, 1, newflag);
	    break;
	case '/':
	    getdata_buf(b_lines - 1, 0, "請輸入看板中文關鍵字:",
			keyword, sizeof(keyword), DOECHO);
	    brdnum = -1;
	    break;
	case 'S':
	    cuser.uflag ^= BRDSORT_FLAG;
	    if(yank_flag == 0){
		if(cuser.uflag & BRDSORT_FLAG){
		    vmsg("favcmpboardclass");
		    qsort(&fav->b, fav->nDatas, sizeof(fav_board_t), 
			  favcmpboardclass);
		}
		else{
		    vmsg("favcmpboardname");
		    qsort(&fav->b, fav->nDatas, sizeof(fav_board_t), 
			  favcmpboardname);
		}
	    }
	    brdnum = -1;
	    break;
	case 'y':
	    yank_flag = (yank_flag + 1) % 2;
	    brdnum = -1;
	    break;
	case Ctrl('D'):
#if 1
	    for (tmp = 0; tmp < fav->nDatas; tmp++) {
		if (fav->b[tmp].attr & BRD_TAG) {
		    favchange = 1;
		    fav->b[tmp].attr &= ~BRD_FAV;
		    fav->b[tmp].attr &= ~BRD_TAG;
		}
#endif
	    }
	    brdnum = -1;
	    break;
	case Ctrl('A'):
#if 1
	    for (tmp = 0; tmp < fav->nDatas; tmp++) {
		if (fav->b[tmp].attr & BRD_TAG) {
		    favchange = 1;
		    fav->b[tmp].attr |= BRD_FAV;
		    fav->b[tmp].attr &= ~BRD_TAG;
		}
	    }
#endif
	    brdnum = -1;
	    break;
	case Ctrl('T'):
#if 1
	    for (tmp = 0; tmp < fav->nDatas; tmp++)
		fav->b[tmp].attr &= ~BRD_TAG;
	    favchange = 1;
	    brdnum = -1;
#endif
	    break;
	case Ctrl('P'):
#if 1
	    if (class_bid != 0 &&
		(HAS_PERM(PERM_SYSOP) || (currmode & MODE_MENU))) {
		for (tmp = 0; tmp < fav->nDatas; tmp++) {
		    boardheader_t  *bh = &bcache[tmp];
		    if (!(fav->b[tmp].attr & BRD_TAG) || bh->gid == class_bid)
			continue;
		    favchange = 1;
		    fav->b[tmp].attr &= ~BRD_TAG;
		    if (bh->gid != class_bid) {
			bh->gid = class_bid;
			substitute_record(FN_BOARD, bh,
					  sizeof(boardheader_t), tmp + 1);
			reset_board(tmp + 1);
			log_usies("SetBoardGID", bh->brdname);
		    }
		}
		brdnum = -1;
	    }
#endif
	    break;
	case 'L':
	    if (HAS_PERM(PERM_BASIC)) {
		if(fav->nDatas > FAVMAX){
		    vmsg("你的最愛太多了啦 真花心");
		    break;
		}
		setfav(0, BRD_FAV | BRD_LINE, 1, 0);
		nbrd[brdnum].bid = fav->nLines;
		nbrd[brdnum].myattr = (BRD_FAV | BRD_LINE);
		movefav(brdnum++, num);
		favchange = 1;
		head = 9999;
	    }
	    break;
	case 'm':
	    if (HAS_PERM(PERM_BASIC)) {
		if(nbrd[num].myattr & BRD_LINE){
		    delfavline(nbrd[num].bid, num);
		}
		else if(fav->nDatas > FAVMAX){
		    vmsg("你的最愛太多了啦 真花心");
		    break;
		}
		else{
		    setfav(nbrd[num].bid, BRD_FAV, 2, 0);
		    nbrd[num].myattr ^= BRD_FAV;
		}
		favchange = 1;
		head = 9999;
	    }
	    break;
	case 'M':
	    if (HAS_PERM(PERM_BASIC)) {
		imovefav(num);
		favchange = 1;
		head = 9999;
	    }
	    break;
	case 'z':
	    vmsg("嘿嘿 這個功\能已經被我的最愛取代掉了喔!");
	    break;
	case 'Z':
	    cuser.uflag2 ^= FAVNEW_FLAG;
	    if(cuser.uflag2 & FAVNEW_FLAG){
		int fd;
		char fname[80];

		setuserfile(fname, FAVNB);

		if( (fd = open(fname, O_RDONLY, 0600)) != -1 ){
		    close(fd);
		    updatenewfav(0);
		}
		else{
		    int i;
		    char stat;
		    if( (fd = open(fname, O_WRONLY | O_CREAT, 0600)) != -1 ){
			for(i = 0; i < numboards; i++){
			    stat = Ben_Perm(&bcache[i]) ? BRD_OLD : BRD_NEW;
			    write(fd, &stat, sizeof(char));
			}
			stat = BRD_END;
			write(fd, &stat, sizeof(char));
			close(fd);
		    }
		}
	    }
	    vmsg((cuser.uflag2 & FAVNEW_FLAG) ? "切換為訂閱\新看板模式" : "切換為正常模式");
	    break;
	case 'v':
	case 'V':
#if 1
	    ptr = &nbrd[num];
	    brc_initial(B_BH(ptr)->brdname);
	    if (ch == 'v') {
		ptr->myattr &= ~BRD_UNREAD;
		favchange = 1;
		brc_list[0] = now;
		setfav(ptr->bid, 0, 0, now);
	    } else {
		favchange = 1;
		brc_list[0] = 1;
		setfav(ptr->bid, 0, 0, 1);
		ptr->myattr |= BRD_UNREAD;
	    }
	    brc_num = brc_changed = 1;
	    brc_update();
	    show_brdlist(head, 0, newflag);
#endif
	    break;
	case 's':
	    if ((tmp = search_board()) == -1) {
		show_brdlist(head, 1, newflag);
		break;
	    }
	    num = tmp;
	    break;
	case 'E':
	    if (HAS_PERM(PERM_SYSOP) || (currmode & MODE_MENU)) {
		ptr = &nbrd[num];
		move(1, 1);
		clrtobot();
		m_mod_board(B_BH(ptr)->brdname);
		brdnum = -1;
	    }
	    break;
	case 'R':
	    if (HAS_PERM(PERM_SYSOP) || (currmode & MODE_MENU)) {
		m_newbrd(1);
		brdnum = -1;
	    }
	    break;
	case 'B':
	    if (HAS_PERM(PERM_SYSOP) || (currmode & MODE_MENU)) {
		m_newbrd(0);
		brdnum = -1;
	    }
	    break;
	case 'W':
	    if (class_bid > 0 &&
		(HAS_PERM(PERM_SYSOP) || (currmode & MODE_MENU))) {
		char            buf[128];
		setbpath(buf, bcache[class_bid - 1].brdname);
		mkdir(buf, 0755);	/* Ptt:開群組目錄 */
		b_note_edit_bname(class_bid);
		brdnum = -1;
	    }
	    break;
	case KEY_RIGHT:
	case '\n':
	case '\r':
	case 'r':
	    {
		char            buf[STRLEN];

		ptr = &nbrd[num];
		if(ptr->myattr & BRD_LINE)
		    break;

		if (!(B_BH(ptr)->brdattr & BRD_GROUPBOARD)) {	/* 非sub class */
		    if (!(B_BH(ptr)->brdattr & BRD_HIDE) ||
			(B_BH(ptr)->brdattr & BRD_POSTMASK)) {
			brc_initial(B_BH(ptr)->brdname);

			if (newflag) {
			    setbdir(buf, currboard);
			    tmp = unread_position(buf, ptr);
			    head = tmp - t_lines / 2;
			    getkeep(buf, head > 1 ? head : 1, tmp + 1);
			}
			board_visit_time = getfavtime(ptr->bid);
			Read();
			check_newpost(ptr);
			head = -1;
			setutmpmode(newflag ? READNEW : READBRD);
		    } else {
			setbfile(buf, B_BH(ptr)->brdname, FN_APPLICATION);
			if (more(buf, YEA) == -1) {
			    move(1, 0);
			    clrtobot();
			    outs(privateboard);
			    pressanykey();
			}
			head = -1;
		    }
		} else {	/* sub class */
		    move(12, 1);
		    bidtmp = class_bid;
		    currmodetmp = currmode;
		    tmp1 = num;
		    num = 0;
		    if (!(B_BH(ptr)->brdattr & BRD_TOP))
			class_bid = ptr->bid;
		    else
			class_bid = -1;	/* 熱門群組用 */

		    if (!(currmode & MODE_MENU))	/* 如果還沒有小組長權限 */
			set_menu_BM(B_BH(ptr)->BM);

		    if (now < B_BH(ptr)->bupdate) {
			setbfile(buf, B_BH(ptr)->brdname, fn_notes);
			if (more(buf, NA) != -1)
			    pressanykey();
		    }
		    tmp = currutmp->brc_id;
		    setutmpbid(ptr->bid);
		    free(nbrd);
		    nbrd = NULL;
			if (yank_flag == 0 ) {
			    yank_flag = 1;
			    choose_board(0);
			    yank_flag = 0;
		    }
			else
			    choose_board(0);
		    currmode = currmodetmp;	/* 離開板板後就把權限拿掉喔 */
		    num = tmp1;
		    class_bid = bidtmp;
		    setutmpbid(tmp);
		    brdnum = -1;
		}
	    }
	}
    } while (ch != 'q');
    free(nbrd);
    nbrd = NULL;
    --choose_board_depth;
}

int
root_board()
{
    class_bid = 1;
    yank_flag = 1;
    choose_board(0);
    return 0;
}

int
Boards()
{
    class_bid = 0;
    yank_flag = 0;
    choose_board(0);
    return 0;
}


int
New()
{
    int             mode0 = currutmp->mode;
    int             stat0 = currstat;

    class_bid = 0;
    choose_board(1);
    currutmp->mode = mode0;
    currstat = stat0;
    return 0;
}

/*
 * int v_favorite(){ char fname[256]; char inbuf[2048]; FILE* fp; int nGroup;
 * char* strtmp;
 * 
 * setuserfile(fname,str_favorite);
 * 
 * if (!(fp=fopen(fname,"r"))) return -1; move(0,0); clrtobot();
 * fgets(inbuf,sizeof(inbuf),fp); nGroup=atoi(inbuf);
 * 
 * currutmp->nGroup=0; currutmp->ninRoot=0;
 * 
 * while(nGroup!=currutmp->nGroup+1){ fgets(inbuf,sizeof(inbuf),fp);
 * prints("%s\n",strtmp=strtok(inbuf," \n"));
 * strcpy(currutmp->gfavorite[currutmp->nGroup++],strtmp);
 * while((strtmp=strtok(NULL, " \n"))){ prints("     %s
 * %d\n",strtmp,getbnum(strtmp)); } currutmp->nGroup++; }
 * prints("+++%d+++\n",currutmp->nGroup);
 * 
 * fgets(inbuf,sizeof(inbuf),fp);
 * 
 * for(strtmp=strtok(inbuf, " \n");strtmp;strtmp=strtok(NULL, " \n")){ if
 * (strtmp[0]!='#') prints("*** %s %d\n",strtmp, getbnum(strtmp)); else
 * prints("*** %s %d\n",strtmp+1, -1); currutmp->ninRoot++; }
 * 
 * fclose(fp); pressanykey(); return 0; }
 */