browse: build download url for files

1 files changed, 138 insertions, 0 deletions

diff --git a/file.c b/file.c
new file mode 100644
index 0000000..fba9682
--- /dev/null
+++ b/file.c
@@ -0,0 +1,138 @@
+/*
+ * Copyright 2023, Vincent Douillet <vincent@vdouillet.fr>
+ *
+ * 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.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ * may be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * 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.
+ */
+
+#include <sys/stat.h>
+
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "config.h"
+#include "file.h"
+#include "url.h"
+#include "util.h"
+
+void
+file_free(struct file * file)
+{
+	if (file == NULL)
+		return;
+
+	if (file->path != NULL) {
+		free(file->path);
+		file->path = NULL;
+	}
+	if (file->name != NULL) {
+		free(file->name);
+		file->name = NULL;
+	}
+	if (file->action_url != NULL) {
+		free(file->action_url);
+		file->action_url = NULL;
+	}
+	free(file);
+}
+
+static bool
+ext_cmp(char *ext, char **ext_list)
+{
+	int 	i;
+
+	for (i = 0; ext_list[i] != NULL; i++) {
+		if (strcmp(ext, ext_list[i]) == 0)
+			return true;
+	}
+
+	return false;
+}
+
+static bool
+find_type(struct file * f)
+{
+	char   *ext;
+	char   *video_ext[] = {"mp4", "mkv", "avi", NULL};
+	char   *audio_ext[] = {"mp3", "flac", "aac", NULL};
+	char   *text_ext[] = {"txt", "doc", "docx", "odt", NULL};
+	char 	path[PATH_MAX];
+	struct stat sb;
+	size_t 	path_len;
+
+	path_len = url_build(path, PATH_MAX, DATA_DIR, f->path, f->name, NULL);
+	if (path_len == 0 || path_len >= PATH_MAX)
+		return false;
+
+	if (stat(path, &sb) != 0)
+		return false;
+
+	f->is_dir = S_ISDIR(sb.st_mode);
+
+	ext = strrchr(f->name, '.');
+	if (!ext || ext == f->name) {
+		f->type = OTHER;
+		return true;
+	}
+	ext++;
+	if (ext_cmp(ext, audio_ext))
+		f->type = AUDIO;
+	else if (ext_cmp(ext, video_ext))
+		f->type = VIDEO;
+	else if (ext_cmp(ext, text_ext))
+		f->type = TEXT;
+	else
+		f->type = OTHER;
+
+	return true;
+}
+
+struct file *
+file_new(char *dir, size_t dir_len, char *name, size_t name_len)
+{
+	struct file *file;
+
+	file = (struct file *) calloc(1, sizeof(struct file));
+	if (file == NULL)
+		return NULL;
+
+	file->path = v_strcpy(dir, dir_len);
+	if (file->path == NULL) {
+		file_free(file);
+		return NULL;
+	}
+	file->name = v_strcpy(name, name_len);
+	if (file->name == NULL) {
+		file_free(file);
+		return NULL;
+	}
+	if (!find_type(file)) {
+		file_free(file);
+		return NULL;
+	}
+	return file;
+}