Add optional file ID to document state

jupyter_ydoc/ybasedoc.py

@@ -110,6 +110,16 @@ def path(self) -> Optional[str]:
  """
  return self._ystate.get("path")
 
+ @property
+ def file_id(self) -> Optional[str]:
+ """
+ Returns document's file ID.
+
+ :return: Document's file ID.
+ :rtype: Optional[str]
+ """
+ return self._ystate.get("file_id")
+
  @path.setter
  def path(self, value: str) -> None:
  """
@@ -121,6 +131,17 @@ def path(self, value: str) -> None:
  with self._ydoc.begin_transaction() as t:
  self._ystate.set(t, "path", value)
 
+ @file_id.setter
+ def file_id(self, value: str) -> None:
+ """
+ Sets document's file ID.
+
+ :param value: Document's file ID.
+ :type value: str
+ """
+ with self._ydoc.begin_transaction() as t:
+ self._ystate.set(t, "file_id", value)
+
  @abstractmethod
  def get(self) -> Any:
  """

jupyter_ydoc/ynotebook.py

@@ -254,7 +254,7 @@ def set(self, value: Dict) -> None:
  self._ymeta.pop(t, key)
  if cells_len:
  self._ycells.delete_range(t, 0, cells_len)
- for key in [k for k in self._ystate if k not in ("dirty", "path")]:
+ for key in [k for k in self._ystate if k not in ("dirty", "path", "file_id")]:
  self._ystate.pop(t, key)
 
  # initialize document