/*	$OpenBSD: rlog.c,v 1.41 2006/04/14 01:11:07 deraadt Exp $	*/
/*
 * Copyright (c) 2005 Joris Vink <joris@openbsd.org>
 * Copyright (c) 2005, 2006 Xavier Santolaria <xsa@openbsd.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL  DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "includes.h"

#include "rcsprog.h"
#include "diff.h"

static void	rlog_file(const char *, const char *);
static void	rlog_rev_print(struct rcs_delta *);
static u_int	rlog_rev_select(void);

#define RLOG_OPTSTRING	"hLl::NqRr::s:TtVw::x::z::"
#define REVSEP		"----------------------------"
#define REVEND \
 "============================================================================="

static int hflag, Lflag, lflag, rflag, tflag, Nflag, wflag;
static char *llist = NULL;
static char *slist = NULL;
static char *wlist = NULL;
static char *revisions = NULL;
static RCSFILE *file;

void
rlog_usage(void)
{
	fprintf(stderr,
	    "usage: rlog [-bhLNqRtV] [-ddates] [-l[lockers]] [-r[revs]]\n"
	    "            [-sstates] [-w[logins]] [-xsuffixes]\n"
	    "            [-ztz] file ...\n");
}

int
rlog_main(int argc, char **argv)
{
	int Rflag;
	int i, ch;
	char fpath[MAXPATHLEN];

	hflag = Rflag = rflag = 0;
	while ((ch = rcs_getopt(argc, argv, RLOG_OPTSTRING)) != -1) {
		switch (ch) {
		case 'h':
			hflag = 1;
			break;
		case 'L':
			Lflag = 1;
			break;
		case 'l':
			lflag = 1;
			llist = rcs_optarg;
			break;
		case 'N':
			Nflag = 1;
			break;
		case 'q':
			verbose = 0;
			break;
		case 'R':
			Rflag = 1;
			break;
		case 'r':
			rflag = 1;
			revisions = rcs_optarg;
			break;
		case 's':
			slist = rcs_optarg;
			break;
		case 'T':
			/*
			 * kept for compatibility
			 */
			break;
		case 't':
			tflag = 1;
			break;
		case 'V':
			printf("%s\n", rcs_version);
			exit(0);
			/* NOTREACHED */
		case 'w':
			wflag = 1;
			wlist = rcs_optarg;
			break;
		case 'x':
			/* Use blank extension if none given. */
			rcs_suffixes = rcs_optarg ? rcs_optarg : "";
			break;
		case 'z':
			timezone_flag = rcs_optarg;
			break;
		default:
			(usage());
			exit(1);
		}
	}

	argc -= rcs_optind;
	argv += rcs_optind;

	if (argc == 0) {
		cvs_log(LP_ERR, "no input file");
		(usage)();
		exit(1);
	}

	if (hflag == 1 && tflag == 1) {
		cvs_log(LP_WARN, "warning: -t overrides -h.");
		hflag = 0;
	}

	for (i = 0; i < argc; i++) {
		if (rcs_statfile(argv[i], fpath, sizeof(fpath)) < 0)
			continue;

		if ((file = rcs_open(fpath, RCS_READ|RCS_PARSE_FULLY)) == NULL)
			continue;

		if (Lflag == 1 && TAILQ_EMPTY(&(file->rf_locks))) {
			rcs_close(file);
			continue;
		}

		if (Rflag == 1) {
			printf("%s\n", fpath);
			rcs_close(file);
			continue;
		}

		rlog_file(argv[i], fpath);

		rcs_close(file);
	}

	return (0);
}

static void
rlog_file(const char *fname, const char *fpath)
{
	char numb[64];
	u_int nrev;
	struct rcs_sym *sym;
	struct rcs_access *acp;
	struct rcs_delta *rdp;
	struct rcs_lock *lkp;

	if (rflag == 1)
		nrev = rlog_rev_select();
	else
		nrev = file->rf_ndelta;

	printf("\nRCS file: %s", fpath);
	printf("\nWorking file: %s", fname);
	printf("\nhead:");
	if (file->rf_head != NULL)
		printf(" %s", rcsnum_tostr(file->rf_head, numb, sizeof(numb)));

	printf("\nbranch:");
	if (rcs_branch_get(file) != NULL) {
		printf(" %s", rcsnum_tostr(rcs_branch_get(file),
		    numb, sizeof(numb)));
	}

	printf("\nlocks: %s", (file->rf_flags & RCS_SLOCK) ? "strict" : "");
	TAILQ_FOREACH(lkp, &(file->rf_locks), rl_list)
		printf("\n\t%s: %s", lkp->rl_name,
		    rcsnum_tostr(lkp->rl_num, numb, sizeof(numb)));
	printf("\naccess list:\n");
	TAILQ_FOREACH(acp, &(file->rf_access), ra_list)
		printf("\t%s\n", acp->ra_name);

	if (Nflag == 0) {
		printf("symbolic names:\n");
		TAILQ_FOREACH(sym, &(file->rf_symbols), rs_list) {
			printf("\t%s: %s\n", sym->rs_name,
			    rcsnum_tostr(sym->rs_num, numb, sizeof(numb)));
		}
	}

	printf("keyword substitution: %s\n",
	    file->rf_expand == NULL ? "kv" : file->rf_expand);

	printf("total revisions: %u", file->rf_ndelta);

	if (file->rf_head != NULL && hflag == 0 && tflag == 0)
		printf(";\tselected revisions: %u", nrev);

	printf("\n");


	if (hflag == 0 || tflag == 1)
		printf("description:\n%s", file->rf_desc);

	if (hflag == 0 && tflag == 0) {
		TAILQ_FOREACH(rdp, &(file->rf_delta), rd_list) {
			/*
			 * if selections are enabled verify that entry is
			 * selected.
			 */
			if (rflag == 0 || (rdp->rd_flags & RCS_RD_SELECT))
				rlog_rev_print(rdp);
		}
	}

	printf("%s\n", REVEND);
}

static void
rlog_rev_print(struct rcs_delta *rdp)
{
	int i, found;
	struct tm t;
	char *author, numb[64], *fmt, timeb[64];
	struct cvs_argvector *largv, *sargv, *wargv;

	i = found = 0;
	author = NULL;

	/* -l[lockers] */
	if (lflag == 1) {
		/* if no locks at all, abort. */
		if (TAILQ_EMPTY(&(file->rf_locks)))
			return;
		else
			if (rdp->rd_locker != NULL)
				found++;

		if (llist != NULL) {
			/* if locker is empty, no need to go further. */
			if (rdp->rd_locker == NULL)
				return;
			largv = cvs_strsplit(llist, ",");
			for (i = 0; largv->argv[i] != NULL; i++) {
				if (strcmp(rdp->rd_locker, largv->argv[i])
				    == 0) {
					found++;
					break;
				}
				found = 0;
			}
			cvs_argv_destroy(largv);
		}
	}

	/* -sstates */
	if (slist != NULL) {
		sargv = cvs_strsplit(slist, ",");
		for (i = 0; sargv->argv[i] != NULL; i++) {
			if (strcmp(rdp->rd_state, sargv->argv[i]) == 0) {
				found++;
				break;
			}
			found = 0;
		}
		cvs_argv_destroy(sargv);
	}

	/* -w[logins] */
	if (wflag == 1) {
		if (wlist != NULL) {
			wargv = cvs_strsplit(wlist, ",");
			for (i = 0; wargv->argv[i] != NULL; i++) {
				if (strcmp(rdp->rd_author, wargv->argv[i])
				    == 0) {
					found++;
					break;
				}
				found = 0;
			}
			cvs_argv_destroy(wargv);
		} else {
			if ((author = getlogin()) == NULL)
				fatal("getlogin failed");

			if (strcmp(rdp->rd_author, author) == 0)
				found++;
		}
	}

	/* XXX dirty... */
	if ((((slist != NULL && wflag == 1) ||
	    (slist != NULL && lflag == 1) ||
	    (lflag == 1 && wflag == 1)) && found < 2) ||
	    (((slist != NULL && lflag == 1 && wflag == 1) ||
	    (slist != NULL || lflag == 1 || wflag == 1)) && found == 0))
		return;

	printf("%s\n", REVSEP);

	rcsnum_tostr(rdp->rd_num, numb, sizeof(numb));

	printf("revision %s", numb);
	if (rdp->rd_locker != NULL)
		printf("\tlocked by: %s;", rdp->rd_locker);

	if (timezone_flag != NULL) {
		rcs_set_tz(timezone_flag, rdp, &t);
		fmt = "%Y/%m/%d %H:%M:%S%z";
	} else {
		t = rdp->rd_date;
		fmt = "%Y/%m/%d %H:%M:%S";
	}

	strftime(timeb, sizeof(timeb), fmt, &t);

	printf("\ndate: %s;  author: %s;  state: %s;\n", timeb, rdp->rd_author,
	    rdp->rd_state);

	printf("%s", rdp->rd_log);
}

static u_int
rlog_rev_select(void)
{
	int i;
	u_int nrev;
	char *ep;
	char *lstr, *rstr;
	struct rcs_delta *rdp;
	struct cvs_argvector *revargv, *revrange;
	RCSNUM lnum, rnum;

	nrev = 0;
	(void)memset(&lnum, 0, sizeof(lnum));
	(void)memset(&rnum, 0, sizeof(rnum));

	if (revisions == NULL) {
		TAILQ_FOREACH(rdp, &file->rf_delta, rd_list)
			if (rcsnum_cmp(rdp->rd_num, file->rf_head, 0) == 0) {
				rdp->rd_flags |= RCS_RD_SELECT;
				return (1);
			}
		return (0);
	}

	revargv = cvs_strsplit(revisions, ",");
	for (i = 0; revargv->argv[i] != NULL; i++) {
		revrange = cvs_strsplit(revargv->argv[i], ":");
		if (revrange->argv[0] == NULL)
			/* should not happen */
			fatal("invalid revision range: %s", revargv->argv[i]);
		else if (revrange->argv[1] == NULL)
			lstr = rstr = revrange->argv[0];
		else {
			if (revrange->argv[2] != NULL)
				fatal("invalid revision range: %s",
					revargv->argv[i]);
			lstr = revrange->argv[0];
			rstr = revrange->argv[1];
			if (strcmp(lstr, "") == 0)
				lstr = NULL;
			if (strcmp(rstr, "") == 0)
				rstr = NULL;
		}

		if (lstr == NULL)
			lstr = RCS_HEAD_INIT;
		if (rcsnum_aton(lstr, &ep, &lnum) == 0 || (*ep != '\0'))
			fatal("invalid revision: %s", lstr);

		if (rstr != NULL) {
			if (rcsnum_aton(rstr, &ep, &rnum) == 0 || (*ep != '\0'))
				fatal("invalid revision: %s", rstr);
		} else
			rcsnum_cpy(file->rf_head, &rnum, 0);

		cvs_argv_destroy(revrange);

		TAILQ_FOREACH(rdp, &file->rf_delta, rd_list)
			if (rcsnum_cmp(rdp->rd_num, &lnum, 0) <= 0 &&
			    rcsnum_cmp(rdp->rd_num, &rnum, 0) >= 0 &&
			    !(rdp->rd_flags & RCS_RD_SELECT)) {
				rdp->rd_flags |= RCS_RD_SELECT;
				nrev++;
			}
	}
	cvs_argv_destroy(revargv);

	if (lnum.rn_id != NULL)
		xfree(lnum.rn_id);
	if (rnum.rn_id != NULL)
		xfree(rnum.rn_id);

	return (nrev);
}