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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2013 Olaf Wintermann. 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. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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.
 */

#ifndef AUTH_H
#define	AUTH_H

#include <sys/types.h>
#include <inttypes.h>
#include "../public/auth.h"

#include <ucx/map.h>

#ifdef	__cplusplus
extern "C" {
#endif

typedef struct {
    User     user;
    char     *authdb;
    sstr_t   *groups;
    size_t   numgroups;
    char     *password;
    uint32_t ref;
} CachedUser;

typedef struct user_cache_elm UserCacheElm;
struct user_cache_elm {
    CachedUser       *user;
    UserCacheElm     *next_user; // next elm in the cached user list
    UcxKey           key;        // key to access this element
    size_t           slot;       // slot in the map
    UserCacheElm     *next_elm;  // next element in this map slot
    time_t           created;
};

typedef struct {
    UserCacheElm  **map;
    size_t        size;
    size_t        count;
    size_t        max_users;
    UserCacheElm  *head;
    UserCacheElm  *trail;
} UserCache;

void auth_cache_init();

User* auth_cache_get(char *authdb, char *user);
void auth_cache_add(
        char *authdb,
        User *user,
        char *password,
        char **groups,
        size_t numgroups);

void auth_cache_remove_from_map(UserCacheElm *elm);

int cached_user_verify_password(CachedUser *user, char *password);
int cached_user_check_group(CachedUser *user, char *group);
void cached_user_unref(CachedUser *user);
void cached_user_delete(CachedUser *user);

#ifdef	__cplusplus
}
#endif

#endif	/* AUTH_H */