Started working on a refactored version

src/entry.c

@@ -0,0 +1,23 @@
+#include "entry.h"
+
+#include "utils.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+
+bool is_entry_id_valid(const char* entry_id) {
+	if (entry_id == NULL)
+		return false;
+
+	size_t length = strlen(entry_id);
+
+	if (length == 0 || length > MAX_ENTRY_LENGTH)
+		return false;
+
+	for (size_t i = 0; i < length; i++)
+		if (entry_id[i] == '/')
+			return false;
+
+	return true;
+}