add(core): open filesystem while adding library path

wordarr/api/fs.py

@@ -0,0 +1,28 @@
+from pathlib import Path
+
+from fastapi import APIRouter
+
+router = APIRouter(prefix="/api/fs", tags=["fs"])
+
+
+@router.get("/browse")
+def browse(path: str = "/"):
+    """List subdirectories for path autocompletion in the library form.
+
+    If `path` ends with '/', its children are listed; otherwise the children
+    of the parent that match the typed last segment.
+    """
+    p = Path(path)
+    if path.endswith("/"):
+        base, prefix = p, ""
+    else:
+        base, prefix = p.parent, p.name.lower()
+    try:
+        dirs = sorted(
+            str(d) for d in base.iterdir()
+            if d.is_dir() and not d.name.startswith(".")
+            and d.name.lower().startswith(prefix)
+        )
+    except OSError:
+        dirs = []
+    return {"dirs": dirs[:50]}