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# Copyright (c) 2018 Ultimaker B.V.
# Cura is released under the terms of the LGPLv3 or higher.
from typing import Dict, Optional, Tuple, TYPE_CHECKING
from UM.Logger import Logger
from cura.Backups.Backup import Backup
if TYPE_CHECKING:
from cura.CuraApplication import CuraApplication
class BackupsManager:
"""
The BackupsManager is responsible for managing the creating and restoring of
back-ups.
Back-ups themselves are represented in a different class.
"""
def __init__(self, application: "CuraApplication") -> None:
self._application = application
def createBackup(self) -> Tuple[Optional[bytes], Optional[Dict[str, str]]]:
"""
Get a back-up of the current configuration.
:return: A tuple containing a ZipFile (the actual back-up) and a dict containing some metadata (like version).
"""
self._disableAutoSave()
backup = Backup(self._application)
backup.makeFromCurrent()
self._enableAutoSave()
# We don't return a Backup here because we want plugins only to interact with our API and not full objects.
return backup.zip_file, backup.meta_data
def restoreBackup(self, zip_file: bytes, meta_data: Dict[str, str]) -> None:
"""
Restore a back-up from a given ZipFile.
:param zip_file: A bytes object containing the actual back-up.
:param meta_data: A dict containing some metadata that is needed to restore the back-up correctly.
"""
if not meta_data.get("cura_release", None):
# If there is no "cura_release" specified in the meta data, we don't execute a backup restore.
Logger.log("w", "Tried to restore a backup without specifying a Cura version number.")
return
self._disableAutoSave()
backup = Backup(self._application, zip_file = zip_file, meta_data = meta_data)
restored = backup.restore()
if restored:
# At this point, Cura will need to restart for the changes to take effect.
# We don't want to store the data at this point as that would override the just-restored backup.
self._application.windowClosed(save_data = False)
def _disableAutoSave(self) -> None:
"""Here we (try to) disable the saving as it might interfere with restoring a back-up."""
self._application.enableSave(False)
auto_save = self._application.getAutoSave()
# The auto save is only not created if the application has not yet started.
if auto_save:
auto_save.setEnabled(False)
else:
Logger.log("e", "Unable to disable the autosave as application init has not been completed")
def _enableAutoSave(self) -> None:
"""Re-enable auto-save and other saving after we're done."""
self._application.enableSave(True)
auto_save = self._application.getAutoSave()
# The auto save is only not created if the application has not yet started.
if auto_save:
auto_save.setEnabled(True)
else:
Logger.log("e", "Unable to enable the autosave as application init has not been completed")
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