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from pathlib import Path
from typing import Dict, List, Optional, Any, TYPE_CHECKING
from .device_model import SubvolumeModification
from ..menu import Menu, TextInput, MenuSelectionType, ListManager
from ..output import FormattedOutput
if TYPE_CHECKING:
_: Any
class SubvolumeMenu(ListManager):
def __init__(self, prompt: str, btrfs_subvols: List[SubvolumeModification]):
self._actions = [
str(_('Add subvolume')),
str(_('Edit subvolume')),
str(_('Delete subvolume'))
]
super().__init__(prompt, btrfs_subvols, [self._actions[0]], self._actions[1:])
def reformat(self, data: List[SubvolumeModification]) -> Dict[str, Optional[SubvolumeModification]]:
table = FormattedOutput.as_table(data)
rows = table.split('\n')
# these are the header rows of the table and do not map to any User obviously
# we're adding 2 spaces as prefix because the menu selector '> ' will be put before
# the selectable rows so the header has to be aligned
display_data: Dict[str, Optional[SubvolumeModification]] = {f' {rows[0]}': None, f' {rows[1]}': None}
for row, subvol in zip(rows[2:], data):
row = row.replace('|', '\\|')
display_data[row] = subvol
return display_data
def selected_action_display(self, subvolume: SubvolumeModification) -> str:
return str(subvolume.name)
def _prompt_options(self, editing: Optional[SubvolumeModification] = None) -> List[str]:
preset_options = []
if editing:
preset_options = editing.mount_options
choice = Menu(
str(_("Select the desired subvolume options ")),
['nodatacow', 'compress'],
skip=True,
preset_values=preset_options,
).run()
if choice.type_ == MenuSelectionType.Selection:
return choice.value # type: ignore
return []
def _add_subvolume(self, editing: Optional[SubvolumeModification] = None) -> Optional[SubvolumeModification]:
name = TextInput(f'\n\n{_("Subvolume name")}: ', editing.name if editing else '').run()
if not name:
return None
mountpoint = TextInput(f'{_("Subvolume mountpoint")}: ', str(editing.mountpoint) if editing else '').run()
if not mountpoint:
return None
options = self._prompt_options(editing)
subvolume = SubvolumeModification(Path(name), Path(mountpoint))
subvolume.compress = 'compress' in options
subvolume.nodatacow = 'nodatacow' in options
return subvolume
def handle_action(
self,
action: str,
entry: Optional[SubvolumeModification],
data: List[SubvolumeModification]
) -> List[SubvolumeModification]:
if action == self._actions[0]: # add
new_subvolume = self._add_subvolume()
if new_subvolume is not None:
# in case a user with the same username as an existing user
# was created we'll replace the existing one
data = [d for d in data if d.name != new_subvolume.name]
data += [new_subvolume]
elif entry is not None:
if action == self._actions[1]: # edit subvolume
new_subvolume = self._add_subvolume(entry)
if new_subvolume is not None:
# we'll remove the original subvolume and add the modified version
data = [d for d in data if d.name != entry.name and d.name != new_subvolume.name]
data += [new_subvolume]
elif action == self._actions[2]: # delete
data = [d for d in data if d != entry]
return data
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