Class BaseState

nextpy/backend/state.py:160–1265

The state of the app.

class BaseState(Base, ABC, extra=pydantic.Extra.allow):
    """The state of the app."""

    # A map from the var name to the var.
    vars: ClassVar[Dict[str, Var]] = {}

    # The base vars of the class.
    base_vars: ClassVar[Dict[str, BaseVar]] = {}

    # The computed vars of the class.
    computed_vars: ClassVar[Dict[str, ComputedVar]] = {}

    # Vars inherited by the parent state.
    inherited_vars: ClassVar[Dict[str, Var]] = {}

    # Backend vars that are never sent to the client.
    backend_vars: ClassVar[Dict[str, Any]] = {}

    # Backend vars inherited
    inherited_backend_vars: ClassVar[Dict[str, Any]] = {}

    # The event handlers.
    event_handlers: ClassVar[Dict[str, EventHandler]] = {}

    # A set of subclassses of this class.
    class_subclasses: ClassVar[Set[Type[BaseState]]] = set()

    # Mapping of var name to set of computed variables that depend on it
    _computed_var_dependencies: ClassVar[Dict[str, Set[str]]] = {}

    # Mapping of var name to set of substates that depend on it
    _substate_var_dependencies: ClassVar[Dict[str, Set[str]]] = {}

    # Set of vars which always need to be recomputed
    _always_dirty_computed_vars: ClassVar[Set[str]] = set()

    # Set of substates which always need to be recomputed
    _always_dirty_substates: ClassVar[Set[str]] = set()

    # The parent state.
    parent_state: Optional[BaseState] = None

    # The substates of the state.
    substates: Dict[str, BaseState] = {}

    # The set of dirty vars.
    dirty_vars: Set[str] = set()

    # The set of dirty substates.
    dirty_substates: Set[str] = set()

    # The routing path that triggered the state
    router_data: Dict[str, Any] = {}

    # Per-instance copy of backend variable values
    _backend_vars: Dict[str, Any] = {}

    # The router data for the current page