Source code for prsctrl_gui.app_state.setup_info_db

""""Singleton" module for the GUI's :class:`.MeasurementSetupInfo` :class:`database <.SettingsDb>`.
"""

from devctrl.utility.settings_db import SettingsDb
from prsctrl.utility.setup import MeasurementSetupInfo
_db = None



def get() -> SettingsDb[str, MeasurementSetupInfo]:
    """Get the initialized instance.

    :raises RuntimeError: If database is not initialized.
    :return: Instance that was set using :func:`init`.
    """
    if not isinstance(_db, SettingsDb):
        raise RuntimeError(f"Database not initialized. Call init() first. (_db = '{_db}')")
    return _db




def init(db: SettingsDb[str, MeasurementSetupInfo]):
    """Initialized the instance.

    :raises RuntimeError: If the instance is already initialized.
    """
    global _db
    if isinstance(_db, SettingsDb):
        raise RuntimeError(f"{_db.__class__.__name__}[{_db._settings_class.__name__}] is already initialized.")
    _db = db