Name saved files with county, data type, and data date

web/server.py

@@ -278,6 +278,15 @@ def list_files():
 
     return jsonify(files)
 
+@app.route('/api/latest-date')
+def latest_date():
+    """Return the folder name that /data/latest symlinks to (used as data date in filenames)."""
+    try:
+        target = os.path.basename(os.path.realpath('/data/latest'))
+        return jsonify({'date': target})
+    except Exception:
+        return jsonify({'date': ''})
+
 @app.route('/data/<path:filename>')
 def serve_data(filename):
     """Serve GeoJSON files"""