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