/*
 *  This file is part of uIRC. (https://git.redxen.eu/caskd/uIRC)
 *  Copyright (c) 2019, 2020 Alex-David Denes
 *
 *  uIRC is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  any later version.
 *
 *  uIRC is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with uIRC.  If not, see <https://www.gnu.org/licenses/>.
 */

#include "assemblers.h" // Assm_user()
#include "types.h"      // IRC_User

#include <assert.h>    // assert()
#include <stdbool.h>   // bool
#include <stdio.h>     // NULL snprintf()
#include <sys/types.h> // size_t

ssize_t
uirc_assembler_user(char* buf, const IRC_User* u, size_t len)
{
	assert(buf != NULL);
	assert(u != NULL);

	char* const sv = buf;

	if (u->nick != NULL) {
		if (len < 1) return -1;
		int res;
		if ((res = snprintf(buf, len, "%s", u->nick)) >= 0) {
			buf += (size_t) res;
			len -= (size_t) res;
		} else
			return -1;
	}
	if (u->user != NULL) {
		if (len < 1) return -1;
		int res;
		if ((res = snprintf(buf, len, "!%s", u->user)) >= 0) {
			buf += (size_t) res;
			len -= (size_t) res;
		} else
			return -1;
	}
	if (u->host != NULL) {
		if (len < 1) return -1;
		int res;
		if ((res = snprintf(buf, len, (u->nick != NULL || u->user != NULL) ? "@%s" : "%s", u->host)) >= 0) {
			buf += (size_t) res;
			len -= (size_t) res;
		} else
			return -1;
	}

	return buf - sv;
}