Add full_info flag in /userdata endpoint to list out file size and last modified timestamp (#4905)

* Add full_info flag in /userdata endpoint to list out file size and last modified timestamp

* nit

tests-unit/prompt_server_test/user_manager_test.py

@@ -0,0 +1,90 @@
+import pytest
+import os
+from aiohttp import web
+from app.user_manager import UserManager
+
+pytestmark = (
+    pytest.mark.asyncio
+)  # This applies the asyncio mark to all test functions in the module
+
+
+@pytest.fixture
+def user_manager(tmp_path):
+    um = UserManager()
+    um.get_request_user_filepath = lambda req, file, **kwargs: os.path.join(
+        tmp_path, file
+    )
+    return um
+
+
+@pytest.fixture
+def app(user_manager):
+    app = web.Application()
+    routes = web.RouteTableDef()
+    user_manager.add_routes(routes)
+    app.add_routes(routes)
+    return app
+
+
+async def test_listuserdata_empty_directory(aiohttp_client, app, tmp_path):
+    client = await aiohttp_client(app)
+    resp = await client.get("/userdata?dir=test_dir")
+    assert resp.status == 404
+
+
+async def test_listuserdata_with_files(aiohttp_client, app, tmp_path):
+    os.makedirs(tmp_path / "test_dir")
+    with open(tmp_path / "test_dir" / "file1.txt", "w") as f:
+        f.write("test content")
+
+    client = await aiohttp_client(app)
+    resp = await client.get("/userdata?dir=test_dir")
+    assert resp.status == 200
+    assert await resp.json() == ["file1.txt"]
+
+
+async def test_listuserdata_recursive(aiohttp_client, app, tmp_path):
+    os.makedirs(tmp_path / "test_dir" / "subdir")
+    with open(tmp_path / "test_dir" / "file1.txt", "w") as f:
+        f.write("test content")
+    with open(tmp_path / "test_dir" / "subdir" / "file2.txt", "w") as f:
+        f.write("test content")
+
+    client = await aiohttp_client(app)
+    resp = await client.get("/userdata?dir=test_dir&recurse=true")
+    assert resp.status == 200
+    assert set(await resp.json()) == {"file1.txt", os.path.join("subdir", "file2.txt")}
+
+
+async def test_listuserdata_full_info(aiohttp_client, app, tmp_path):
+    os.makedirs(tmp_path / "test_dir")
+    with open(tmp_path / "test_dir" / "file1.txt", "w") as f:
+        f.write("test content")
+
+    client = await aiohttp_client(app)
+    resp = await client.get("/userdata?dir=test_dir&full_info=true")
+    assert resp.status == 200
+    result = await resp.json()
+    assert len(result) == 1
+    assert result[0]["path"] == "file1.txt"
+    assert "size" in result[0]
+    assert "modified" in result[0]
+
+
+async def test_listuserdata_split_path(aiohttp_client, app, tmp_path):
+    os.makedirs(tmp_path / "test_dir" / "subdir")
+    with open(tmp_path / "test_dir" / "subdir" / "file1.txt", "w") as f:
+        f.write("test content")
+
+    client = await aiohttp_client(app)
+    resp = await client.get("/userdata?dir=test_dir&recurse=true&split=true")
+    assert resp.status == 200
+    assert await resp.json() == [
+        [os.path.join("subdir", "file1.txt"), "subdir", "file1.txt"]
+    ]
+
+
+async def test_listuserdata_invalid_directory(aiohttp_client, app):
+    client = await aiohttp_client(app)
+    resp = await client.get("/userdata?dir=")
+    assert resp.status == 400