"""Non-doable elements of ProcessStep/Todo chains."""
from __future__ import annotations
+from typing import Any
from sqlite3 import Row
from plomtask.db import DatabaseConnection, BaseModel
-from plomtask.misc import VersionedAttribute
-from plomtask.exceptions import NotFoundException
+from plomtask.versioned_attributes import VersionedAttribute
+from plomtask.exceptions import HandledException
-class Condition(BaseModel):
- """Non Process-dependency for ProcessSteps and Todos."""
+class Condition(BaseModel[int]):
+ """Non-Process dependency for ProcessSteps and Todos."""
table_name = 'conditions'
to_save = ['is_active']
def __init__(self, id_: int | None, is_active: bool = False) -> None:
- self.set_int_id(id_)
+ super().__init__(id_)
self.is_active = is_active
self.title = VersionedAttribute(self, 'condition_titles', 'UNNAMED')
self.description = VersionedAttribute(self, 'condition_descriptions',
'')
+ def __lt__(self, other: Condition) -> bool:
+ assert isinstance(self.id_, int)
+ assert isinstance(other.id_, int)
+ return self.id_ < other.id_
+
@classmethod
def from_table_row(cls, db_conn: DatabaseConnection,
- row: Row) -> Condition:
+ row: Row | list[Any]) -> Condition:
"""Build condition from row, including VersionedAttributes."""
condition = super().from_table_row(db_conn, row)
- assert isinstance(condition, Condition)
- for title_row in db_conn.exec('SELECT * FROM condition_titles '
- 'WHERE parent_id = ?', (row[0],)):
- condition.title.history[title_row[1]]\
- = title_row[2] # pylint: disable=no-member
- for desc_row in db_conn.exec('SELECT * FROM condition_descriptions '
- 'WHERE parent_id = ?', (row[0],)):
- condition.description.history[desc_row[1]]\
- = desc_row[2] # pylint: disable=no-member
- return condition
-
- @classmethod
- def all(cls, db_conn: DatabaseConnection) -> list[Condition]:
- """Collect all Conditions and their VersionedAttributes."""
- conditions = {}
- for id_, condition in db_conn.cached_conditions.items():
- conditions[id_] = condition
- already_recorded = conditions.keys()
- for row in db_conn.exec('SELECT id FROM conditions'):
- if row[0] not in already_recorded:
- condition = cls.by_id(db_conn, row[0])
- conditions[condition.id_] = condition
- return list(conditions.values())
-
- @classmethod
- def by_id(cls, db_conn: DatabaseConnection, id_: int | None,
- create: bool = False) -> Condition:
- """Collect (or create) Condition and its VersionedAttributes."""
- condition = None
- if id_ in db_conn.cached_conditions.keys():
- condition = db_conn.cached_conditions[id_]
- else:
- for row in db_conn.exec('SELECT * FROM conditions WHERE id = ?',
- (id_,)):
- condition = cls.from_table_row(db_conn, row)
- break
- if not condition:
- if not create:
- raise NotFoundException(f'Condition not found of id: {id_}')
- condition = cls(id_, False)
+ for name in ('title', 'description'):
+ table_name = f'condition_{name}s'
+ for row_ in db_conn.row_where(table_name, 'parent', row[0]):
+ getattr(condition, name).history_from_row(row_)
return condition
def save(self, db_conn: DatabaseConnection) -> None:
self.save_core(db_conn)
self.title.save(db_conn)
self.description.save(db_conn)
- assert isinstance(self.id_, int)
- db_conn.cached_conditions[self.id_] = self
+
+ def remove(self, db_conn: DatabaseConnection) -> None:
+ """Remove from DB, with VersionedAttributes.
+
+ Checks for Todos and Processes that depend on Condition, prohibits
+ deletion if found.
+ """
+ if self.id_ is None:
+ raise HandledException('cannot remove unsaved item')
+ for item in ('process', 'todo'):
+ for attr in ('conditions', 'enables', 'disables'):
+ table_name = f'{item}_{attr}'
+ for _ in db_conn.row_where(table_name, 'condition', self.id_):
+ raise HandledException('cannot remove Condition in use')
+ db_conn.delete_where('condition_titles', 'parent', self.id_)
+ db_conn.delete_where('condition_descriptions', 'parent', self.id_)
+ super().remove(db_conn)
+
+
+class ConditionsRelations:
+ """Methods for handling relations to Conditions, for Todo and Process."""
+
+ def set_conditions(self, db_conn: DatabaseConnection, ids: list[int],
+ target: str = 'conditions') -> None:
+ """Set self.[target] to Conditions identified by ids."""
+ target_list = getattr(self, target)
+ while len(target_list) > 0:
+ target_list.pop()
+ for id_ in ids:
+ target_list += [Condition.by_id(db_conn, id_)]
+
+ def set_enables(self, db_conn: DatabaseConnection,
+ ids: list[int]) -> None:
+ """Set self.enables to Conditions identified by ids."""
+ self.set_conditions(db_conn, ids, 'enables')
+
+ def set_disables(self, db_conn: DatabaseConnection,
+ ids: list[int]) -> None:
+ """Set self.disables to Conditions identified by ids."""
+ self.set_conditions(db_conn, ids, 'disables')