first commit

app/services/assets.py

@@ -0,0 +1,18 @@
+import hashlib
+from functools import lru_cache
+from pathlib import Path
+
+from flask import url_for
+
+
+@lru_cache(maxsize=128)
+def asset_version(file_path: str) -> str:
+    path = Path(file_path)
+    if not path.exists():
+        return '0'
+    return hashlib.md5(path.read_bytes()).hexdigest()[:10]
+
+
+def asset_url(relative_path: str) -> str:
+    base_path = Path(__file__).resolve().parent.parent / 'static' / relative_path
+    return url_for('static', filename=relative_path, v=asset_version(str(base_path)))