From 39fea719bfb70e431c1cdd7e121bdf3ccf1c80db Mon Sep 17 00:00:00 2001
From: whaffman <whaffman@student.codam.nl>
Date: Thu, 24 Apr 2025 11:40:35 +0200
Subject: [PATCH] valid_arguments

---
 inc/parser.h                 |  3 ++-
 src/main.c                   |  7 ++---
 src/parser/valid_arguments.c | 50 ++++++++++++++++++++++++++++++++++++
 3 files changed, 54 insertions(+), 6 deletions(-)
 create mode 100644 src/parser/valid_arguments.c

diff --git a/inc/parser.h b/inc/parser.h
index 8caecf6..7e31609 100644
--- a/inc/parser.h
+++ b/inc/parser.h
@@ -6,7 +6,7 @@
 /*   By: whaffman <whaffman@student.codam.nl>         +#+                     */
 /*                                                   +#+                      */
 /*   Created: 2025/04/19 14:41:55 by whaffman      #+#    #+#                 */
-/*   Updated: 2025/04/23 12:28:37 by whaffman      ########   odam.nl         */
+/*   Updated: 2025/04/24 11:38:31 by whaffman      ########   odam.nl         */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -28,5 +28,6 @@ int				parse_file(char *buffer, t_map *map);
 void			print_config(t_map *map);
 t_tile			**copy_map(t_tile **grid, int width, int height);
 char			**pointer_lines(char *buffer, char c);
+int				valid_arguments(int argc, char **argv);
 
 #endif
\ No newline at end of file
diff --git a/src/main.c b/src/main.c
index 35d6d35..3fbb717 100644
--- a/src/main.c
+++ b/src/main.c
@@ -6,7 +6,7 @@
 /*   By: qmennen <qmennen@student.codam.nl>           +#+                     */
 /*                                                   +#+                      */
 /*   Created: 2025/04/15 16:01:29 by qmennen       #+#    #+#                 */
-/*   Updated: 2025/04/23 11:58:04 by whaffman      ########   odam.nl         */
+/*   Updated: 2025/04/24 11:39:05 by whaffman      ########   odam.nl         */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -18,11 +18,8 @@ int	main(int argc, char **argv)
 
 	errno = 0;
 	game = NULL;
-	if (argc != 2)
-	{
-		ft_putstr_fd("Usage: ./cub3d <map.cub>\n", 2);
+	if (!valid_arguments(argc, argv))
 		return (EXIT_FAILURE);
-	}
 	if (!initialize_cub3d(&game, argv[1]))
 	{
 		perror("initialize_cub3d");
diff --git a/src/parser/valid_arguments.c b/src/parser/valid_arguments.c
new file mode 100644
index 0000000..6c34884
--- /dev/null
+++ b/src/parser/valid_arguments.c
@@ -0,0 +1,50 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        ::::::::            */
+/*   valid_arguments.c                                  :+:    :+:            */
+/*                                                     +:+                    */
+/*   By: whaffman <whaffman@student.codam.nl>         +#+                     */
+/*                                                   +#+                      */
+/*   Created: 2025/04/24 11:28:55 by whaffman      #+#    #+#                 */
+/*   Updated: 2025/04/24 11:38:05 by whaffman      ########   odam.nl         */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "cub3d.h"
+#include "libft.h"
+
+static int	valid_extension(char *filename)
+{
+	int		len;
+
+	len = ft_strlen(filename);
+	if (len < 4)
+		return (FAILURE);
+	if (!ft_strncmp(filename + len - 4, ".cub", 4))
+		return (SUCCESS);
+	return (FAILURE);
+}
+
+int	valid_arguments(int argc, char **argv)
+{
+	int		fd;
+
+	if (argc != 2)
+		return (ft_putstr_fd("Usage: ./cub3d <map.cub>\n", 2), FAILURE);
+	if (!valid_extension(argv[1]))
+	{
+		ft_putstr_fd("Error: Invalid file extension. Expected .cub\n", 2);
+		return (FAILURE);
+	}
+	fd = open(argv[1], O_RDONLY);
+	if (fd < 0)
+		return (perror("Error opening file"), FAILURE);
+	if (read(fd, NULL, 0) < 0)
+	{
+		perror("Error reading file");
+		close(fd);
+		return (FAILURE);
+	}
+	close(open(argv[1], O_RDONLY));
+	return (SUCCESS);
+}