improving look and feel

src/models/file_metadata.py

@@ -0,0 +1,23 @@
+import os
+import time
+
+class FileMetadata:
+    def __init__(self, code, file_path, max_downloads=1, expiry_hours=24):
+        self.code = code
+        self.file_path = file_path
+        self.max_downloads = max_downloads
+        self.expiry_time = time.time() + (expiry_hours * 3600)
+        self.download_count = 0
+
+    def is_expired(self):
+        return time.time() > self.expiry_time
+
+    def increment_download_count(self):
+        self.download_count += 1
+
+    def can_download(self):
+        return self.download_count < self.max_downloads and not self.is_expired()
+
+    def delete_file(self):
+        if os.path.exists(self.file_path):
+            os.remove(self.file_path)