1 """Non-doable elements of ProcessStep/Todo chains."""
2 from __future__ import annotations
3 from plomtask.db import DatabaseConnection, BaseModel
4 from plomtask.versioned_attributes import VersionedAttribute
5 from plomtask.exceptions import HandledException
8 class Condition(BaseModel[int]):
9 """Non-Process dependency for ProcessSteps and Todos."""
10 table_name = 'conditions'
11 to_save_simples = ['is_active']
12 versioned_defaults = {'title': 'UNNAMED', 'description': ''}
13 to_search = ['title.newest', 'description.newest']
14 can_create_by_id = True
15 sorters = {'is_active': lambda c: c.is_active,
16 'title': lambda c: c.title.newest}
18 def __init__(self, id_: int | None, is_active: bool = False) -> None:
20 self.is_active = is_active
21 for name in ['title', 'description']:
22 attr = VersionedAttribute(self, f'condition_{name}s',
23 self.versioned_defaults[name])
24 setattr(self, name, attr)
26 def remove(self, db_conn: DatabaseConnection) -> None:
27 """Remove from DB, with VersionedAttributes.
29 Checks for Todos and Processes that depend on Condition, prohibits
32 if self.id_ is not None:
33 for item in ('process', 'todo'):
34 for attr in ('conditions', 'blockers', 'enables', 'disables'):
35 table_name = f'{item}_{attr}'
36 for _ in db_conn.row_where(table_name, 'condition',
38 msg = 'cannot remove Condition in use'
39 raise HandledException(msg)
40 super().remove(db_conn)
43 class ConditionsRelations:
44 """Methods for handling relations to Conditions, for Todo and Process."""
46 def __init__(self) -> None:
47 self.conditions: list[Condition] = []
48 self.blockers: list[Condition] = []
49 self.enables: list[Condition] = []
50 self.disables: list[Condition] = []
52 def set_conditions(self, db_conn: DatabaseConnection, ids: list[int],
53 target: str = 'conditions') -> None:
54 """Set self.[target] to Conditions identified by ids."""
55 target_list = getattr(self, target)
56 while len(target_list) > 0:
59 target_list += [Condition.by_id(db_conn, id_)]
61 def set_blockers(self, db_conn: DatabaseConnection,
62 ids: list[int]) -> None:
63 """Set self.enables to Conditions identified by ids."""
64 self.set_conditions(db_conn, ids, 'blockers')
66 def set_enables(self, db_conn: DatabaseConnection,
67 ids: list[int]) -> None:
68 """Set self.enables to Conditions identified by ids."""
69 self.set_conditions(db_conn, ids, 'enables')
71 def set_disables(self, db_conn: DatabaseConnection,
72 ids: list[int]) -> None:
73 """Set self.disables to Conditions identified by ids."""
74 self.set_conditions(db_conn, ids, 'disables')