Moved SPA definition to a new file

spoolman/client.py

@@ -0,0 +1,25 @@
+"""Functions for providing the client interface."""
+
+# ruff: noqa: PTH118
+
+import os
+from typing import Union
+
+from fastapi.staticfiles import StaticFiles
+
+
+class SinglePageApplication(StaticFiles):
+    """Serve a single page application."""
+
+    def __init__(self, directory: str) -> None:
+        """Construct."""
+        super().__init__(directory=directory, packages=None, html=True, check_dir=True)
+
+    def lookup_path(self, path: str) -> tuple[str, Union[os.stat_result, None]]:
+        """Return index.html if the requested file cannot be found."""
+        full_path, stat_result = super().lookup_path(path)
+
+        if stat_result is None:
+            return super().lookup_path("index.html")
+
+        return (full_path, stat_result)