/* Conversion routines for Magick 1.4b2 and Wrecked 1.2 databases.
 *
 * IRC Services is copyright (c) 1996-2007 Andrew Church.
 *     E-mail: <achurch@achurch.org>
 * Parts written by Andrew Kempe and others.
 * This program is free but copyrighted software; see the file COPYING for
 * details.
 */

#include "convert-db.h"

#if NICKMAX < 32
# error NICKMAX too small (must be >=32)
#elif CHANMAX < 64
# error CHANMAX too small (must be >=64)
#elif PASSMAX < 32
# error PASSMAX too small (must be >=32)
#endif

/*************************************************************************/

static void m14_load_nick(const char *sourcedir, int32 version)
{
    dbFILE *f;
    long i, j;
    int c;
    NickInfo *ni;
    NickGroupInfo *ngi;
    struct oldni_ {
	struct oldni_ *next, *prev;
	char nick[32];
	char pass[32];
	char *email;
	char *url;
	char *usermask;
	char *realname;
	time_t reg;
	time_t seen;
	long naccess;
	char **access;
	long nignore;
	char **ignore;
	long flags;
	long resv[4];
    } oldni;

    f = open_db_ver(sourcedir, "nick.db", version, version, NULL);
    for (i = 33; i < 256; i++) {
	while ((c = getc_db(f)) == 1) {
	    SAFE(read_variable(oldni, f));
	    if (version == 6) {
		time_t last_signon;
		long uin;
		SAFE(read_variable(last_signon, f));
		SAFE(read_variable(uin, f));
	    }
	    if (oldni.email)
		SAFE(read_string(&oldni.email, f));
	    if (oldni.url)
		SAFE(read_string(&oldni.url, f));
	    SAFE(read_string(&oldni.usermask, f));
	    SAFE(read_string(&oldni.realname, f));
	    ni = makenick(oldni.nick, &ngi);
	    ni->last_usermask = oldni.usermask;
	    ni->last_realname = oldni.realname;
	    ni->last_quit = NULL;
	    ni->time_registered = oldni.reg;
	    ni->last_seen = oldni.seen;
	    strscpy(ngi->pass, oldni.pass, PASSMAX);
	    ngi->url = oldni.url;
	    ngi->email = oldni.email;
	    ngi->access_count = oldni.naccess;
	    ngi->ignore_count = oldni.nignore;
	    if (version == 5)
		oldni.flags &= 0x000000FF;
	    if (oldni.flags & 0x00000001)
		ngi->flags |= NF_KILLPROTECT;
	    if (oldni.flags & 0x00000002)
		ngi->flags |= NF_SECURE;
	    if (oldni.flags & 0x00000004) {
		ni->status |= NS_VERBOTEN;
		ni->nickgroup = 0;
	    }
	    if (oldni.flags & 0x00004008)
		ni->status |= NS_NOEXPIRE;
	    if (oldni.flags & 0x00000010)
		ngi->flags |= NF_PRIVATE;
	    if (oldni.flags & 0x00000020) {
		ngi->suspendinfo = new_suspendinfo("<unknown>", NULL, 0);
		ngi->suspendinfo->reason = (char *)(
		    version==6 ? "Unknown (imported from Wrecked IRC Services)"
		               : "Unknown (imported from Magick IRC Services)"
		    );
	    }
	    if (oldni.flags & 0x00000080) {
		ni->status |= 0x8000;  /* Flag: this is a linked nick */
		ni->nickgroup = 0;
	    }
	    if (oldni.flags & 0x00000100)
		ngi->memos.memomax = 0;
	    if (oldni.flags & 0x00000200)
		ngi->flags |= NF_HIDE_EMAIL;
	    ngi->access = smalloc(ngi->access_count * sizeof(char *));
	    for (j = 0; j < ngi->access_count; j++)
		SAFE(read_string(&ngi->access[j], f));
	    ngi->ignore = smalloc(ngi->ignore_count * sizeof(char *));
	    for (j = 0; j < ngi->ignore_count; j++)
		SAFE(read_string(&ngi->ignore[j], f));
	} /* while more entries */
	if (c != 0) {
	    fprintf(stderr, "%s is corrupt, aborting.\n", f->filename);
	    exit(1);
	}
    } /* for 33..256 */
    close_db(f);

    /* Resolve links */
    for (ni = first_nickinfo(); ni; ni = next_nickinfo()) {
	NickInfo *ni2;
	const char *last_nick;
	if (ni->status & 0x8000) {
	    ni->status &= ~0x8000;
	    ni2 = ni;
	    /* Find root nick (this will actually stop at the first nick
	     * in the path to the root that isn't marked as linked, but
	     * that's okay because such a nick will already have its
	     * nickgroup ID set correctly) */
	    do {
		last_nick = ni2->last_usermask;
		ni2 = get_nickinfo(last_nick);
	    } while (ni2 && (ni2->status & 0x8000));
	    /* Set nickgroup and last usermask field, or delete nick if an
	     * error occurred */
	    if (ni2 == ni) {
		fprintf(stderr,
			"Warning: dropping nick %s with circular link\n",
			ni->nick);
		del_nickinfo(ni);
	    } else if (!ni2) {
		fprintf(stderr, "Warning: dropping nick %s linked to"
			" nonexistent nick %s\n", ni->nick, last_nick);
		del_nickinfo(ni);
	    } else {
		ngi = get_nickgroupinfo(ni->nickgroup);
		if (ngi)
		    del_nickgroupinfo(ngi);
		ni->nickgroup = ni2->nickgroup;
		ni->last_usermask = ni2->last_usermask;
		ngi = get_nickgroupinfo(ni->nickgroup);
		if (ngi) {
		    ARRAY_EXTEND(ngi->nicks);
		    strscpy(ngi->nicks[ngi->nicks_count-1], ni->nick, NICKMAX);
		} else if (ni->nickgroup != 0) {
		    fprintf(stderr, "Warning: Nick group %d for nick %s not"
			    " found -- program bug?  Output may be corrupt.",
			    ni->nickgroup, ni->nick);
		}
	    }
	}
    }
}

/*************************************************************************/

static int16 magick_convert_level(int16 lev) {
    if (lev >= 20)
	return lev-10;
    else if (lev >= 5)
	return lev/2;
    else if (lev >= 1)
	return (lev+1)/2;
    else
	return lev;
};

static int16 wrecked_convert_level(int16 lev) {
    if (lev >= 25)
	return lev-15;
    else if (lev >= 15)
	return (lev-5)/10;
    else if (lev >= 10)
	return 4;
    else if (lev >= 5)
	return 3;
    else if (lev >= 1)
	return (lev+1) / 2;
    else
	return lev;
};


static void m14_load_chan(const char *sourcedir, int32 version)
{
    char *s;
    dbFILE *f;
    long i, j;
    int c;
    int16 tmp16;
    int16 (*my_convert_level)(int16);
    ChannelInfo *ci;
    NickInfo *ni;
    struct access_ {
	short level;
	short is_nick;
	char *name;
    } access;
    struct akick_ {
	short is_nick;
	short pad;
	char *name;
	char *reason;
    } akick;
    struct oldci_ {
	struct oldci_ *next, *prev;
	char name[64];
	char founder[32];
	char pass[32];
	char *desc;
	char *url;
	time_t reg;
	time_t used;
	long naccess;
	struct access_ *access;
	long nakick;
	struct akick_ *akick;
	char mlock_on[64], mlock_off[64];
	long mlock_limit;
	char *mlock_key;
	char *topic;
	char topic_setter[32];
	time_t topic_time;
	long flags;
	short *levels;
	long resv[3];
    } oldci;

    if (version == 6)
	my_convert_level = wrecked_convert_level;
    else
	my_convert_level = magick_convert_level;

    f = open_db_ver(sourcedir, "chan.db", version, version, NULL);
    for (i = 33; i < 256; i++) {
	while ((c = getc_db(f)) == 1) {
	    SAFE(read_variable(oldci, f));
	    SAFE(read_string(&oldci.desc, f));
	    if (oldci.url)
		SAFE(read_string(&oldci.url, f));
	    if (oldci.mlock_key)
		SAFE(read_string(&oldci.mlock_key, f));
	    if (oldci.topic)
		SAFE(read_string(&oldci.topic, f));
	    ci = makechan(oldci.name);
	    if (*oldci.founder) {
		ni = get_nickinfo(oldci.founder);
		if (!ni) {
		    fprintf(stderr,
			    "Warning: Founder %s for channel %s not found\n",
			    oldci.founder, oldci.name);
		} else if (ni->status & NS_VERBOTEN) {
		    fprintf(stderr, "Warning: Founder %s for channel %s is a"
			    " forbidden nick\n", oldci.founder, oldci.name);
		} else if (!ni->nickgroup) {
		    fprintf(stderr, "Warning: Founder %s for channel %s has"
			    " an invalid nickname record (bug?)\n",
			    oldci.founder, oldci.name);
		} else {
		    ci->founder = ni->nickgroup;
		}
	    }
	    strscpy(ci->founderpass, oldci.pass, PASSMAX);
	    ci->desc = oldci.desc;
	    ci->url = oldci.url;
	    ci->time_registered = oldci.reg;
	    ci->last_used = oldci.used;
	    ci->access_count = oldci.naccess;
	    ci->akick_count = oldci.nakick;
	    ci->mlock_on = scalloc(64, 1);
	    strscpy(ci->mlock_on, oldci.mlock_on, 64);
	    ci->mlock_off = scalloc(64, 1);
	    strscpy(ci->mlock_off, oldci.mlock_off, 64);
	    ci->mlock_limit = oldci.mlock_limit;
	    ci->mlock_key = oldci.mlock_key;
	    ci->last_topic = oldci.topic;
	    strscpy(ci->last_topic_setter, oldci.topic_setter, NICKMAX);
	    ci->last_topic_time = oldci.topic_time;
	    ci->memos.memomax = MEMOMAX_DEFAULT;
	    if (version == 5)
		oldci.flags &= 0x000003FF;
	    if (oldci.flags & 0x00000001)
		ci->flags |= CI_KEEPTOPIC;
	    if (oldci.flags & 0x00000002)
		ci->flags |= CI_SECUREOPS;
	    if (oldci.flags & 0x00000004)
		ci->flags |= CI_PRIVATE;
	    if (oldci.flags & 0x00000008)
		ci->flags |= CI_TOPICLOCK;
	    if (oldci.flags & 0x00000010)
		ci->flags |= CI_RESTRICTED;
	    if (oldci.flags & 0x00000020)
		ci->flags |= CI_LEAVEOPS;
	    if (oldci.flags & 0x00000040)
		ci->flags |= CI_SECURE;
	    if (oldci.flags & 0x00000080)
		ci->flags |= CI_VERBOTEN;
	    if (oldci.flags & 0x00000100) {
		ci->suspendinfo = new_suspendinfo("<unknown>", NULL, 0);
		ci->suspendinfo->reason = (char *)(
		    version==6 ? "Unknown (imported from Wrecked IRC Services)"
		               : "Unknown (imported from Magick IRC Services)"
		    );
	    }
	    if (oldci.flags & 0x00000400)
		ci->flags |= CI_NOEXPIRE;

	    ci->access = scalloc(sizeof(ChanAccess), ci->access_count);
	    for (j = 0; j < oldci.naccess; j++) {
		SAFE(read_variable(access, f));
		ci->access[j].nickgroup = (access.is_nick == 1);  /* in_use */
		ci->access[j].level =
		    convert_acclev(my_convert_level(access.level));
	    }
	    for (j = 0; j < oldci.naccess; j++) {
		SAFE(read_string(&s, f));
		if (!s) {
		    ci->access[j].nickgroup = 0;
		    continue;
		}
		if (ci->access[j].nickgroup) {
		    ni = get_nickinfo(s);
		    ci->access[j].nickgroup = ni ? ni->nickgroup : 0;
		}
	    }

	    ci->akick = scalloc(sizeof(AutoKick), oldci.nakick);
	    for (j = 0; j < oldci.nakick; j++) {
		SAFE(read_variable(akick, f));
		/* `lastused' field temporarily used to hold `is_nick' */
		ci->akick[j].lastused = akick.is_nick;
		ci->akick[j].reason = akick.reason;
		strscpy(ci->akick[j].who, "<unknown>", NICKMAX);
		ci->akick[j].set = time(NULL);
	    }
	    for (j = 0; j < oldci.nakick; j++) {
		SAFE(read_string(&ci->akick[j].mask, f));
		if (ci->akick[j].lastused) {  /* was `is_nick' */
		    char *s = smalloc(strlen(ci->akick[j].mask)+5);
		    sprintf(s, "%s!*@*", ci->akick[j].mask);
		    free(ci->akick[j].mask);
		    ci->akick[j].mask = s;
		}
		ci->akick[j].lastused = 0;
		if (ci->akick[j].reason) {
		    SAFE(read_string(&ci->akick[j].reason, f));
		    if (!ci->akick[j].mask && ci->akick[j].reason)
			ci->akick[j].reason = NULL;
		}
	    }

	    SAFE(read_int16(&tmp16, f));
	    for (j = tmp16; j > 0; j--)
		SAFE(read_int16(&tmp16, f));

	    /* Only insert in list if founder is found or channel is
	     * forbidden */
	    if (ci->founder || (ci->flags & CI_VERBOTEN))
		add_channelinfo(ci);
	} /* while more entries */
	if (c != 0) {
	    fprintf(stderr, "%s is corrupt, aborting.\n", f->filename);
	    exit(1);
	}
    } /* for 33..256 */

    close_db(f);
}

/*************************************************************************/

static void m14_load_memo(const char *sourcedir, int32 version)
{
    char *s;
    dbFILE *f;
    struct memo_ {
	char sender[32];
	long number;
	time_t time;
	char *text;
	long resv[4];
    } memo;
    struct memolist_ {
	struct memolist_ *next, *prev;
	char nick[32];
	long n_memos;
	Memo *memos;
	long resv[4];
    } memolist;
    NickGroupInfo *ngi;
    Memo *m = NULL;
    long i, j, flags = 0;
    int c;

    f = open_db_ver(sourcedir, "memo.db", version, version, NULL);
    for (i = 33; i < 256; i++) {
	while ((c = getc_db(f)) == 1) {
	    SAFE(read_variable(memolist, f));
	    ngi = get_nickgroupinfo_by_nick(memolist.nick);
	    if (ngi) {
		ngi->memos.memos_count = memolist.n_memos;
		m = scalloc(sizeof(*m), ngi->memos.memos_count);
		ngi->memos.memos = m;
	    }
	    for (j = 0; j < memolist.n_memos; j++) {
		SAFE(read_variable(memo, f));
		if (version == 6) {
		    SAFE(read_variable(flags, f));
		    flags = memo.resv[0] & 1;
		}
		if (ngi) {
		    m[j].number = memo.number;
		    if (flags & 1)
			m[j].flags |= MF_UNREAD;
		    m[j].time = memo.time;
		    strscpy(m[j].sender, memo.sender, NICKMAX);
		}
	    }
	    for (j = 0; j < memolist.n_memos; j++) {
		SAFE(read_string(&s, f));
		if (ngi)
		    m[j].text = s;
	    }
	}
	if (c != 0) {
	    fprintf(stderr, "%s is corrupt, aborting.\n", f->filename);
	    exit(1);
	}
    }
    close_db(f);
}

/*************************************************************************/

static void m14_load_sop(const char *sourcedir, int32 version)
{
    char nick[32];
    dbFILE *f;
    int16 n, i;

    f = open_db_ver(sourcedir, "sop.db", version, version, NULL);
    SAFE(read_int16(&n, f));
    for (i = 0; i < n; i++) {
	SAFE(read_buffer(nick, f));
	set_os_priv(nick, NP_SERVADMIN);
    }
    close_db(f);
}

/*************************************************************************/

static void m14_load_akill(const char *sourcedir, int32 version)
{
    dbFILE *f;
    int16 i, n;
    MaskData *md;
    struct akill_ {
	char *mask;
	char *reason;
	char who[32];
	time_t time;
    } akill;

    f = open_db_ver(sourcedir, "akill.db", version, version, NULL);
    SAFE(read_int16(&n, f));
    md = scalloc(sizeof(*md), n);
    for (i = 0; i < n; i++) {
	SAFE(read_variable(akill, f));
	strscpy(md[i].who, akill.who, NICKMAX);
	md[i].time = akill.time;
	md[i].expires = 0;
    }
    for (i = 0; i < n; i++) {
	SAFE(read_string(&md[i].mask, f));
	SAFE(read_string(&md[i].reason, f));
	add_maskdata(MD_AKILL, &md[i]);
    }
    close_db(f);
}

/*************************************************************************/

static void m14_load_clone(const char *sourcedir, int32 version)
{
    dbFILE *f;
    int16 i, n;
    MaskData *md;
    struct allow_ {
	char *host;
	int amount;
	char *reason;
	char who[32];
	time_t time;
    } allow;

    f = open_db_ver(sourcedir, "clone.db", version, version, NULL);
    SAFE(read_int16(&n, f));
    md = scalloc(sizeof(*md), n);
    for (i = 0; i < n; i++) {
	SAFE(read_variable(allow, f));
	strscpy(md[i].who, allow.who, NICKMAX);
	md[i].limit = allow.amount;
	md[i].time = allow.time;
	md[i].expires = 0;
	md[i].num = i+1;
    }
    for (i = 0; i < n; i++) {
	SAFE(read_string(&md[i].mask, f));
	SAFE(read_string(&md[i].reason, f));
	add_maskdata(MD_EXCEPTION, &md[i]);
    }
    close_db(f);
}

/*************************************************************************/

static void m14_load_message(const char *sourcedir, int32 version)
{
    dbFILE *f;
    int16 i, n;
    NewsItem *news;
    struct message_ {
	char *text;
	int type;
	char who[32];
	time_t time;
    } msg;

    f = open_db_ver(sourcedir, "message.db", version, version, NULL);
    SAFE(read_int16(&n, f));
    news = scalloc(sizeof(*news), n);
    for (i = 0; i < n; i++) {
	SAFE(read_variable(msg, f));
	news[i].type = msg.type;
	strscpy(news[i].who, msg.who, NICKMAX);
	news[i].time = msg.time;
    }
    for (i = 0; i < n; i++) {
	SAFE(read_string(&news[i].text, f));
	add_news(&news[i]);
    }
    close_db(f);
}

/*************************************************************************/
/*************************************************************************/

static const char *check_magick_14b2(const char *sourcedir)
{
    FILE *f;
    char buf[PATH_MAX+1];

    snprintf(buf, sizeof(buf), "%s/message.db", sourcedir);
    f = fopen(buf, "rb");
    if (f) {
	int ver;
	ver  = fgetc(f)<<24;
	ver |= fgetc(f)<<16;
	ver |= fgetc(f)<<8;
	ver |= fgetc(f);
	fclose(f);
	if (ver == 5)
	    return "Magick 1.4b2";
    }
    return NULL;
}

static void load_magick_14b2(const char *sourcedir, int verbose, int ac,
			     char **av)
{
    if (ac > 1) {
	fprintf(stderr, "Unrecognized option %s\n", av[1]);
	usage(av[0]);
    }
    if (verbose)
	fprintf(stderr, "Loading nick.db...\n");
    m14_load_nick(sourcedir, 5);
    if (verbose)
	fprintf(stderr, "Loading chan.db...\n");
    m14_load_chan(sourcedir, 5);
    if (verbose)
	fprintf(stderr, "Loading memo.db...\n");
    m14_load_memo(sourcedir, 5);
    if (verbose)
	fprintf(stderr, "Loading sop.db...\n");
    m14_load_sop(sourcedir, 5);
    if (verbose)
	fprintf(stderr, "Loading akill.db...\n");
    m14_load_akill(sourcedir, 5);
    if (verbose)
	fprintf(stderr, "Loading clone.db...\n");
    m14_load_clone(sourcedir, 5);
    if (verbose)
	fprintf(stderr, "Loading message.db...\n");
    m14_load_message(sourcedir, 5);
}

/*************************************************************************/
/*************************************************************************/

static const char *check_wrecked_1_2(const char *sourcedir)
{
    FILE *f;
    char buf[PATH_MAX+1];

    snprintf(buf, sizeof(buf), "%s/message.db", sourcedir);
    f = fopen(buf, "rb");
    if (f) {
	int ver;
	ver  = fgetc(f)<<24;
	ver |= fgetc(f)<<16;
	ver |= fgetc(f)<<8;
	ver |= fgetc(f);
	fclose(f);
	if (ver == 6)
	    return "Wrecked 1.2.0";
    }
    return NULL;
}

static void load_wrecked_1_2(const char *sourcedir, int verbose, int ac,
			     char **av)
{
    if (ac > 1) {
	fprintf(stderr, "Unrecognized option %s\n", av[1]);
	usage(av[0]);
    }
    if (verbose)
	fprintf(stderr, "Loading nick.db...\n");
    m14_load_nick(sourcedir, 6);
    if (verbose)
	fprintf(stderr, "Loading chan.db...\n");
    m14_load_chan(sourcedir, 6);
    if (verbose)
	fprintf(stderr, "Loading memo.db...\n");
    m14_load_memo(sourcedir, 6);
    if (verbose)
	fprintf(stderr, "Loading sop.db...\n");
    m14_load_sop(sourcedir, 6);
    if (verbose)
	fprintf(stderr, "Loading akill.db...\n");
    m14_load_akill(sourcedir, 6);
    if (verbose)
	fprintf(stderr, "Loading clone.db...\n");
    m14_load_clone(sourcedir, 6);
    if (verbose)
	fprintf(stderr, "Loading message.db...\n");
    m14_load_message(sourcedir, 6);
}

/*************************************************************************/
/*************************************************************************/

DBTypeInfo dbtype_magick_14b2 = {
    "magick-1.4",
    check_magick_14b2,
    load_magick_14b2
};

DBTypeInfo dbtype_wrecked_1_2 = {
    "wrecked-1.2",
    check_wrecked_1_2,
    load_wrecked_1_2
};

/*************************************************************************/