Persist session items to a JSON file on disk.
| 18 | |
| 19 | |
| 20 | class FileSession(Session): |
| 21 | """Persist session items to a JSON file on disk.""" |
| 22 | |
| 23 | session_settings: SessionSettings | None = None |
| 24 | |
| 25 | def __init__(self, *, dir: str | Path | None = None, session_id: str | None = None) -> None: |
| 26 | self._dir = Path(dir) if dir is not None else Path.cwd() / ".agents-sessions" |
| 27 | self.session_id = session_id or "" |
| 28 | # Ensure the directory exists up front so subsequent file operations do not race. |
| 29 | self._dir.mkdir(parents=True, exist_ok=True) |
| 30 | |
| 31 | async def _ensure_session_id(self) -> str: |
| 32 | if not self.session_id: |
| 33 | timestamp = datetime.now().strftime("%Y%m%d%H%M%S") |
| 34 | # Prefix with wall-clock time so recent sessions are easy to spot on disk. |
| 35 | self.session_id = f"{timestamp}-{uuid4().hex[:12]}" |
| 36 | await asyncio.to_thread(self._dir.mkdir, parents=True, exist_ok=True) |
| 37 | file_path = self._items_path(self.session_id) |
| 38 | if not file_path.exists(): |
| 39 | await asyncio.to_thread(file_path.write_text, "[]", encoding="utf-8") |
| 40 | return self.session_id |
| 41 | |
| 42 | async def get_session_id(self) -> str: |
| 43 | """Return the session id, creating one if needed.""" |
| 44 | return await self._ensure_session_id() |
| 45 | |
| 46 | async def get_items(self, limit: int | None = None) -> list[Any]: |
| 47 | session_id = await self._ensure_session_id() |
| 48 | items = await self._read_items(session_id) |
| 49 | if limit is not None and limit >= 0: |
| 50 | return items[-limit:] |
| 51 | return items |
| 52 | |
| 53 | async def add_items(self, items: list[Any]) -> None: |
| 54 | if not items: |
| 55 | return |
| 56 | session_id = await self._ensure_session_id() |
| 57 | current = await self._read_items(session_id) |
| 58 | # Deep-copy via JSON to avoid persisting live references that might mutate later. |
| 59 | cloned = json.loads(json.dumps(items)) |
| 60 | await self._write_items(session_id, current + cloned) |
| 61 | |
| 62 | async def pop_item(self) -> Any | None: |
| 63 | session_id = await self._ensure_session_id() |
| 64 | items = await self._read_items(session_id) |
| 65 | if not items: |
| 66 | return None |
| 67 | popped = items.pop() |
| 68 | await self._write_items(session_id, items) |
| 69 | return popped |
| 70 | |
| 71 | async def clear_session(self) -> None: |
| 72 | if not self.session_id: |
| 73 | return |
| 74 | file_path = self._items_path(self.session_id) |
| 75 | state_path = self._state_path(self.session_id) |
| 76 | try: |
| 77 | await asyncio.to_thread(file_path.unlink) |
no outgoing calls
no test coverage detected