creates index, but only for most recent post

1 files changed, 35 insertions, 27 deletions

diff --git a/index.c b/index.c
index b617b91..e9b42a3 100644
--- a/index.c
+++ b/index.c
@@ -10,10 +10,39 @@
 
 #include <errno.h>
 
+static void insert_into(int blogdir, char *index_dir, const char *uri, const char *title)
+{
+	char index_path[FILENAME_MAX] = { 0 };
+	snprintf(index_path, sizeof(index_path), "%s/index.html", index_dir);
+
+	/* check for exisint index */
+	int old_index = openat(blogdir, index_path, O_RDONLY);
+
+	char new_path[FILENAME_MAX] = { 0 };
+	snprintf(new_path, sizeof(new_path), "%s.new", index_path);
+	int new_index = openat(blogdir, new_path, O_WRONLY | O_CREAT, 0644);
+
+	dprintf(new_index, HTML_HEAD, "index");
+	dprintf(new_index, "<a href=\"/%s\">%s</a><br>", uri, title);
+
+	if (old_index != -1) {
+		/* add old entries */
+		close(old_index);
+	}
+
+	dprintf(new_index, HTML_TAIL, current_year());
+
+	close(new_index);
+
+	renameat(blogdir, new_path, blogdir, index_path);
+}
+
 void add_to_index(const char *path, const char *title)
 {
+	/*
 	printf("Status: 200 OK\r\n");
 	printf("Content-Type: text/plain\r\n\r\n");
+	*/
 
 	int blogdir = open(DATA_DIRECTORY, O_DIRECTORY);
 	if (blogdir == -1) {
@@ -27,33 +56,12 @@ void add_to_index(const char *path, const char *title)
 		return;
 	}
 
-	char index_path[FILENAME_MAX] = { 0 };
-	snprintf(index_path, sizeof(index_path), "%s/index.html", dirname(dir));
-
-	/* open index.html */
-	int index_fd = openat(blogdir, index_path, O_RDWR | O_CREAT, 0644);
-	if (index_fd == -1) {
-		printf("open(index_path): %s\n", strerror(errno));
-		return;
-	}
-
-	/* find the end of text */
-	off_t eot = 0;
-
-	if (eot == 0) {
-		dprintf(index_fd, HTML_HEAD, "index");
-	} else {
-		ftruncate(index_fd, eot);
-	}
-
-	/* add link */
-	dprintf(index_fd, "<a href=\"/%s\">%s</a><br>", path, title);
-
-	/* (re-)add footer */
-	dprintf(index_fd, HTML_TAIL, current_year());
-
-	close(index_fd);
-
+	char *day = dirname(dir);
+	insert_into(blogdir, day, path, title);
+	char *month = dirname(day);
+	insert_into(blogdir, month, path, title);
+	char *year = dirname(month);
+	insert_into(blogdir, year, path, title);
 
 	free(dir);
 	close(blogdir);