/*
 * Copyright (c) 2021 joshua stein <jcs@jcs.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef __USER_H__
#define __USER_H__

#include "sha2.h"

#define AUTH_USER_OK		1
#define AUTH_USER_FAILED	2
#define AUTH_USER_GUEST		3
#define AUTH_USER_SIGNUP	4

#define GUEST_USERNAME		"guest"

struct user {
	unsigned long id;
	char username[DB_USERNAME_LENGTH + 1];
	char password_hash[SHA256_DIGEST_STRING_LENGTH + 1]; /* 66 */
	char password_salt[SHA256_DIGEST_STRING_LENGTH + 1];
	unsigned long created_at;
	unsigned long last_seen_at;
	short is_sysop;
	short is_enabled;
	unsigned long last_motd_seen;
};

struct username_cache {
	unsigned long id;
	char username[DB_USERNAME_LENGTH + 1];
};

void user_cache_usernames(void);
bool user_save(struct user *user);
struct user * user_find(unsigned long id);
struct user * user_find_by_username(const char *username);
struct username_cache * user_username(unsigned long id);
short user_authenticate(struct user *user, const char *password);
bool user_set_password(struct user *user, const char *password);
bool user_valid_username(struct user *user, char *username, char **error);
bool user_username_is_banned(char *username);
unsigned long user_first_sysop_id(void);
void user_change_password(struct session *s, struct user *user);
void user_delete(struct user *user);

#endif