Refactor

agenda/utils.py

@@ -1,5 +1,6 @@
 """Utility functions."""
 
+import os
 from datetime import date, datetime, timezone
 
 
@@ -65,3 +66,14 @@ def filename_timestamp(filename: str, ext: str) -> tuple[datetime, str] | None:
     except ValueError:
         return None
     return (ts, filename)
+
+
+def get_most_recent_file(directory: str, ext: str) -> str | None:
+    """Get most recent file from directory."""
+    existing = [
+        x for x in (filename_timestamp(f, ext) for f in os.listdir(directory)) if x
+    ]
+    if not existing:
+        return None
+    existing.sort(reverse=True)
+    return os.path.join(directory, existing[0][1])