def save_uuid(self, uuid: QUuid) -> str:
""" Store a Quuid and return a integer id as string to minimize file save/load effort.
This method should only be used on file saving!
"""
uuid_str = uuid.toString()
if uuid_str in self.item_ids:
return self.item_ids[uuid_str]
self.str_ids += 1
str_id = str(self.str_ids)
self.item_ids[uuid_str] = str_id
return str_id
class KnechtModelIdentifiers(QObject):
debug_preset = False
debug_ref = False
check_recurring_id = QUuid()
def __init__(self, parent_model):
""" ID Manager stores item identifiers for the parent model
:param modules.itemview.model.KnechtModel parent_model:
"""
super(KnechtModelIdentifiers, self).__init__(parent=parent_model)
self.model = parent_model
self._presets = IdStorage()
self._references = IdStorage()
self.invalid_references = IdStorage()
self.recursive_items = list()
def preset_id_changed(self, _id: QUuid, item: KnechtItem,
add: bool) -> None:
""" Preset Ids updated from model """
# -- Remove from Id storage --
if not add:
self._presets.remove_item(item)
if self.debug_preset:
LOGGER.debug(
f'Removed Preset {_id.toString()[-5:-1]}['
f'{len(self._presets.items):02d}] - {item.data(0)[:3]}{item.data(1)[:10]} - {self.model}'
)
return
# -- Add to Id storage --
if is_valid_uuid(_id):
self._presets.add(_id, item)
if self.debug_preset:
LOGGER.debug(
f'Added Preset {_id.toString()[-5:-1]}['
f'{len(self._presets.items):02d}] - {item.data(0)[:3]}{item.data(1)[:10]} - {self.model}'
)
def reference_id_changed(self,
_id: QUuid,
item: KnechtItem,
add: bool,
invalid: bool = False) -> None:
""" Reference Ids updated from model """
# -- Add invalid reference --
if invalid and add:
self.invalid_references.add(_id, item)
if self.debug_ref:
LOGGER.debug(
f'Adding invalid Reference {_id.toString()[-5:-1]}['
f'{len(self.invalid_references.items):02d}] {item.data(1)[:10]} - {self.model}'
)
# -- Remove invalid reference --
elif invalid and not add:
self.invalid_references.remove_item(item)
if self.debug_ref:
LOGGER.debug(
f'Removing from invalid References ['
f'{len(self.invalid_references.items):02d}] {item.data(1)[:10]} - {self.model}'
)
# -- Remove from Id storage --
elif not invalid and not add:
self._references.remove_item(item)
if self.debug_ref:
LOGGER.debug(
f'Removed Reference {_id.toString()[-5:-1]}['
f'{len(self._references.items):02d}] {item.data(1)[:10]} - {self.model}'
)
# -- Add to Id storage --
elif not invalid and add:
self.invalid_references.remove_item(item)
self._references.add(_id, item)
if self.debug_ref:
LOGGER.debug(
f'Added Reference {_id.toString()[-5:-1]}['
f'{len(self._references.items):02d}] - {item.data(1)[:10]} - {self.model}'
)
def is_item_referenced_preset(self, preset: KnechtItem) -> bool:
if self._references.has_id(preset.preset_id):
return True
return False
def is_item_reference(self, reference: KnechtItem) -> bool:
if self._references.has_item(reference):
return True
return False
def is_index_referenced_preset(self, index: QModelIndex) -> bool:
item = self.model.get_item(index)
if item and self._references.has_id(item.preset_id):
return True
return False
def is_index_reference(self, index: QModelIndex):
item = self.model.get_item(index)
if item and self._references.has_item(item):
return True
return False
def is_id_existing_preset(self, _id: QUuid):
return self._presets.has_id(_id)
def has_invalid_references(self) -> bool:
return self.invalid_references.has_items()
def has_recursive_items(self) -> bool:
if self.recursive_items:
return True
return False
def iterate_presets(self):
return self._presets.item_iterator()
def iterate_references(self):
return self._references.item_iterator()
def iterate_invalid_references(self):
return self.invalid_references.item_iterator()
def iterate_recursive_items(self):
yield from self.recursive_items
def validate_reference(self, _id):
if not self._presets.get_item(_id):
return False
return True
def get_preset_id_from_index(
self, preset_index: QModelIndex) -> Union[QUuid, None]:
item = self.model.get_item(preset_index)
if item:
return item.preset_id
def get_reference_id_from_index(
self, preset_index: QModelIndex) -> Union[QUuid, None]:
item = self.model.get_item(preset_index)
if item:
return item.reference
def get_preset_from_reference_index(
self, index: QModelIndex) -> Union[None, KnechtItem]:
referenced_id = self.get_reference_id_from_index(index)
return self._presets.get_item(referenced_id)
def get_references_from_preset_index(
self, index: QModelIndex) -> Iterable[KnechtItem]:
preset_id = self.get_preset_id_from_index(index)
return self._references.get_all_items_by_id(preset_id)
def get_references_from_id(self, _id):
return self._references.get_all_items_by_id(_id)
def get_preset_from_id(self, _id):
return self._presets.get_item(_id)
def get_invalid_references_indices(
self, proxy_model: QSortFilterProxyModel = None):
""" Get indices to all invalid references """
return self._convert_items_to_indices(
self.iterate_invalid_references(), proxy_model)
def get_recursive_indices(self, proxy_model: QSortFilterProxyModel = None):
""" Get indices to all recursive references """
return self._convert_items_to_indices(self.iterate_recursive_items(),
proxy_model)
def get_references_by_indices(
self,
index_list: Iterable[QModelIndex],
proxy_model: QSortFilterProxyModel = None,
) -> Tuple[Iterable[QModelIndex], Iterable[QModelIndex]]:
""" Get referenced presets and reference indices.
Provide a list of model indices and get two separate lists
containing:
* all referenced preset items linked from the provided reference indices
* all reference items linking to the provided preset indices
*IMPORTANT* The returned indices will have their column at 0
:param Iterable[QModelIndex] index_list: the indices to look up
:param QSortFilterProxyModel proxy_model: the proxy model the results should be mapped to
:rtype Tuple[Iterable[QModelIndex], Iterable[QModelIndex]]: (list(), list())
:returns : Tuple with list of referenced Presets and list of reference indices.
"""
reference_items = list()
referenced_presets = list()
# --- Collect referenced items ---
for index in index_list:
if self.is_index_referenced_preset(index):
reference_items += self.get_references_from_preset_index(index)
continue
if self.is_index_reference(index):
referenced_presets.append(
self.get_preset_from_reference_index(index))
reference_index_ls = [
idx for idx in self._convert_items_to_indices(
reference_items, proxy_model)
]
preset_index_ls = [
idx for idx in self._convert_items_to_indices(
referenced_presets, proxy_model)
]
return preset_index_ls, reference_index_ls
def get_all_links_from_index(self, index: QModelIndex):
""" Get *all* indices that have the same id as the provided index
*IMPORTANT* The returned indices will have their column at 0
:returns Iterable[QModelIndex]: All references and presets with matching id
"""
linked_items = list()
if self.is_index_referenced_preset(index):
linked_items += self.get_references_from_preset_index(index)
if self.is_index_reference(index):
reference_id = self.get_reference_id_from_index(index)
linked_items += self.get_references_from_id(reference_id)
linked_items.append(self.get_preset_from_id(reference_id))
index_ls = [
idx for idx in self._convert_items_to_indices(linked_items)
]
if index in index_ls:
index_ls.remove(index)
return index_ls
def reset_recursive_items(self):
self.recursive_items = list()
def get_recursive_items(self,
preset) -> List[Tuple[KnechtItem, KnechtItem]]:
""" Check every know preset in the model for recursive references.
:returns [ (KnechtItem, KnechtItem) ]: List containing recursive preset item and
child item causing the recursion as pair inside a tuple.
"""
self.check_recurring_id = preset.preset_id
recursive_preset, recursive_child = self._check_preset(preset, 0)
if recursive_preset or recursive_child:
if recursive_preset not in self.recursive_items:
self.recursive_items.append(recursive_preset)
if recursive_child not in self.recursive_items:
self.recursive_items.append(recursive_child)
return self.recursive_items
def _check_preset(
self,
preset: KnechtItem,
depth: int = 0
) -> Union[Tuple[KnechtItem, KnechtItem], Tuple[None, None]]:
if depth > 10:
return None, None
for child in preset.iter_children():
ref_id = child.reference
if not isinstance(ref_id, QUuid):
continue
if ref_id == self.check_recurring_id:
return preset, child
referenced_preset = self.get_preset_from_id(ref_id)
if referenced_preset:
depth += 1
recursive_preset, recursive_child = self._check_preset(
referenced_preset, depth)
if recursive_preset:
return recursive_preset, recursive_child
return None, None
def _convert_items_to_indices(
self,
items: Iterable[KnechtItem],
proxy_model: QSortFilterProxyModel = None
) -> Iterator[QModelIndex]:
for item in items:
index = self.model.get_index_from_item(item)
proxy_index = None
if proxy_model:
proxy_index = proxy_model.mapFromSource(index)
if proxy_index:
yield proxy_index
continue
if index:
yield index
def setUp(self):
self.original = QUuid("67C8770B-44F1-410A-AB9A-F9B5446F13EE")
def testFromString(self):
uuidString = '{fc69b59e-cc34-4436-a43c-ee95d128b8c5}'
uuid = QUuid(uuidString)
self.assertTrue(not uuid.isNull())
self.assertEqual(uuid.toString(), uuidString)
