/* SPDX-License-Identifier: GPL-3.0-only */
/* SPDX-FileCopyrightText: 2026 afiw <afiw@linuxposting.xyz> */

/*
 * can - query filesystem permissions
 * Copyright (C) 2026 afiw <afiw@linuxposting.xyz>
 *
 * This program 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, exclusively version 3 of the License.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#include <errno.h>
#include <string.h>
#include <sys/stat.h>
#include "action.h"

int action_of_cstring(char const* cstring) {
  if (strcmp(cstring, "read") == 0) {
    return ACTION_READ; }
  else if (strcmp(cstring, "write") == 0) {
    return ACTION_WRITE; }
  else if (strcmp(cstring, "edit") == 0) {
    return ACTION_WRITE; }
  else if (strcmp(cstring, "execute") == 0) {
    return ACTION_EXECUTE; }
  else if (strcmp(cstring, "run") == 0) {
    return ACTION_EXECUTE; }
  errno = EINVAL;
  return -1; }

mode_t user_bit_of_action(enum action action) {
  return (mode_t[]){ [ACTION_READ] = S_IRUSR,
                     [ACTION_WRITE] = S_IWUSR,
                     [ACTION_EXECUTE] = S_IXUSR }[action]; }

mode_t group_bit_of_action(enum action action) {
  return (mode_t[]){ [ACTION_READ] = S_IRGRP,
                     [ACTION_WRITE] = S_IWGRP,
                     [ACTION_EXECUTE] = S_IXGRP }[action]; }

mode_t other_bit_of_action(enum action action) {
  return (mode_t[]){ [ACTION_READ] = S_IROTH,
                     [ACTION_WRITE] = S_IWOTH,
                     [ACTION_EXECUTE] = S_IXOTH }[action]; }