/* Copyright (C) 2013-2022 Greenbone AG
 *
 * SPDX-License-Identifier: AGPL-3.0-or-later
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * @file manage_acl.h
 * @brief Headers for Greenbone Vulnerability Manager: the Manage library.
 */

#ifndef _GVMD_MANAGE_ACL_H
#define _GVMD_MANAGE_ACL_H

#include "manage_sql.h"
#include <glib.h>

/**
 * @brief Generate SQL for user permission check.
 *
 * @param[in]  resource  Resource.
 */
#define ACL_USER_MAY_OPTS(resource)                                          \
  /* This part is 'Any resource type' case from acl_where_owned_user. */     \
  /* */                                                                      \
  /* Either the user is the owner. */                                        \
  " ((" resource ".owner = opts.user_id)"                                    \
  /* Or the user has super permission on all. */                             \
  "  OR EXISTS (SELECT * FROM permissions_subject"                           \
  "             WHERE name = 'Super'"                                        \
  "             AND (resource = 0))"                                         \
  /* Or the user has super permission on the owner, */                       \
  /* (directly, via the role, or via the group).    */                       \
  "  OR " resource ".owner IN (SELECT *"                                     \
  "                            FROM super_on_users)"                         \
  /* Or there's a resource-level permission. */                              \
  /* */                                                                      \
  /* This part is permission_clause in acl_where_owned_user. */              \
  "  OR EXISTS (SELECT id FROM permissions_subject"                          \
  "             WHERE resource = " resource ".id"                            \
  "             AND resource_type = opts.type"                               \
  "             AND resource_location = " G_STRINGIFY (LOCATION_TABLE)       \
  /*            Any permission. */                                           \
  "             AND (t ())))"

/**
 * @brief Generate SQL for user permission check.
 *
 * @param[in]  resource  Resource.
 */
#define ACL_USER_MAY(resource)                                        \
  "SELECT count(*) > 0 FROM permissions"                              \
  " WHERE resource = " resource                                       \
  " AND subject_location = " G_STRINGIFY (LOCATION_TABLE)             \
  " AND ((subject_type = 'user'"                                      \
  "       AND subject"                                                \
  "           = (SELECT id FROM users"                                \
  "              WHERE users.uuid = '%s'))"                           \
  "      OR (subject_type = 'group'"                                  \
  "          AND subject"                                             \
  "              IN (SELECT DISTINCT \"group\""                       \
  "                  FROM group_users"                                \
  "                  WHERE \"user\" = (SELECT id"                     \
  "                                FROM users"                        \
  "                                WHERE users.uuid"                  \
  "                                      = '%s')))"                   \
  "      OR (subject_type = 'role'"                                   \
  "          AND subject"                                             \
  "              IN (SELECT DISTINCT role"                            \
  "                  FROM role_users"                                 \
  "                  WHERE \"user\" = (SELECT id"                     \
  "                                    FROM users"                    \
  "                                    WHERE users.uuid"              \
  "                                          = '%s'))))"              \
  /* Any permission implies GET. */                                   \
  " AND ((lower (substr ('%s', 1, 3)) = 'get'"                        \
  "       AND name LIKE '%%'"                                         \
  "                     || lower (substr ('%s',"                      \
  "                                       5,"                         \
  "                                       length ('%s') - 5)))"       \
  "      OR name = lower ('%s'))"

/**
 * @brief Generate SQL for global check.
 *
 * This is the SQL clause for selecting global resources.
 */
#define ACL_IS_GLOBAL()                                    \
  "owner IS NULL"

/**
 * @brief Generate SQL for user ownership check.
 *
 * This is the SQL clause for selecting global resources and resources owned
 * directly by the user.
 *
 * Caller must organise the single argument, the user's UUID, as a string.
 */
#define ACL_USER_OWNS()                                    \
  " (owner = (SELECT users.id FROM users"                  \
  "           WHERE users.uuid = '%s'))"

/**
 * @brief Generate SQL for user ownership check.
 *
 * This is the SQL clause for selecting global resources and resources owned
 * directly by the user.
 *
 * Caller must organise the single argument, the user's UUID, as a string.
 */
#define ACL_GLOBAL_OR_USER_OWNS()                              \
  " ((" ACL_IS_GLOBAL () ")"                                   \
  "  OR (owner = (SELECT users.id FROM users"                  \
  "               WHERE users.uuid = '%s')))"

command_t *
acl_commands (gchar **);

int
acl_user_may (const char *);

int
acl_user_can_everything (const char *);

int
acl_role_can_super_everyone (const char *);

int
acl_user_can_super_everyone (const char *);

int
acl_user_has_super (const char *, user_t);

int
acl_user_is_admin (const char *);

int
acl_user_is_user (const char *);

int
acl_user_is_super_admin (const char *);

int
acl_user_is_observer (const char *);

int
acl_user_owns (const char *, resource_t, int);

int
acl_user_is_owner (const char *, const char *);

int
acl_user_owns_uuid (const char *, const char *, int);

int
acl_user_owns_trash_uuid (const char *resource, const char *uuid);

int
acl_user_has_access_uuid (const char *, const char *, const char *, int);

gchar *
acl_where_owned (const char *, const get_data_t *, int, const gchar *, resource_t,
                 array_t *, int, gchar **);

gchar *
acl_where_owned_for_get (const char *, const char *, const char *, gchar **);

gchar *
acl_users_with_access_sql (const char *, const char *, const char *);

gchar *
acl_users_with_access_where (const char *, const char *, const char *,
                             const char*);

#endif /* not _GVMD_MANAGE_ACL_H */
