plomlompom.com Git - plomtask/blob - plomtask/conditions.py

   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
   6
   7
   8 class Condition(BaseModel[int]):
   9     """Non-Process dependency for ProcessSteps and Todos."""
  10     table_name = 'conditions'
  11     to_save = ['is_active']
  12     to_save_versioned = ['title', 'description']
  13     to_search = ['title.newest', 'description.newest']
  14     can_create_by_id = True
  15
  16     def __init__(self, id_: int | None, is_active: bool = False) -> None:
  17         super().__init__(id_)
  18         self.is_active = is_active
  19         self.title = VersionedAttribute(self, 'condition_titles', 'UNNAMED')
  20         self.description = VersionedAttribute(self, 'condition_descriptions',
  21                                               '')
  22
  23     def remove(self, db_conn: DatabaseConnection) -> None:
  24         """Remove from DB, with VersionedAttributes.
  25
  26         Checks for Todos and Processes that depend on Condition, prohibits
  27         deletion if found.
  28         """
  29         if self.id_ is not None:
  30             for item in ('process', 'todo'):
  31                 for attr in ('conditions', 'blockers', 'enables', 'disables'):
  32                     table_name = f'{item}_{attr}'
  33                     for _ in db_conn.row_where(table_name, 'condition',
  34                                                self.id_):
  35                         msg = 'cannot remove Condition in use'
  36                         raise HandledException(msg)
  37         super().remove(db_conn)
  38
  39
  40 class ConditionsRelations:
  41     """Methods for handling relations to Conditions, for Todo and Process."""
  42
  43     def __init__(self) -> None:
  44         self.conditions: list[Condition] = []
  45         self.blockers: list[Condition] = []
  46         self.enables: list[Condition] = []
  47         self.disables: list[Condition] = []
  48
  49     def set_conditions(self, db_conn: DatabaseConnection, ids: list[int],
  50                        target: str = 'conditions') -> None:
  51         """Set self.[target] to Conditions identified by ids."""
  52         target_list = getattr(self, target)
  53         while len(target_list) > 0:
  54             target_list.pop()
  55         for id_ in ids:
  56             target_list += [Condition.by_id(db_conn, id_)]
  57
  58     def set_blockers(self, db_conn: DatabaseConnection,
  59                      ids: list[int]) -> None:
  60         """Set self.enables to Conditions identified by ids."""
  61         self.set_conditions(db_conn, ids, 'blockers')
  62
  63     def set_enables(self, db_conn: DatabaseConnection,
  64                     ids: list[int]) -> None:
  65         """Set self.enables to Conditions identified by ids."""
  66         self.set_conditions(db_conn, ids, 'enables')
  67
  68     def set_disables(self, db_conn: DatabaseConnection,
  69                      ids: list[int]) -> None:
  70         """Set self.disables to Conditions identified by ids."""
  71         self.set_conditions(db_conn, ids, 'disables')