2 from __future__ import annotations
3 from dataclasses import dataclass
5 from sqlite3 import Row
6 from plomtask.db import DatabaseConnection, BaseModel
7 from plomtask.processes import Process
8 from plomtask.conditions import Condition, ConditionsRelations
9 from plomtask.exceptions import (NotFoundException, BadFormatException,
15 """Collects what's useful to know for Todo/Condition tree display."""
18 children: list[TodoNode]
21 class Todo(BaseModel[int], ConditionsRelations):
22 """Individual actionable."""
23 # pylint: disable=too-many-instance-attributes
25 to_save = ['process_id', 'is_done', 'date']
26 to_save_relations = [('todo_conditions', 'todo', 'conditions'),
27 ('todo_enables', 'todo', 'enables'),
28 ('todo_disables', 'todo', 'disables'),
29 ('todo_children', 'parent', 'children'),
30 ('todo_children', 'child', 'parents')]
32 def __init__(self, id_: int | None, process: Process,
33 is_done: bool, date: str) -> None:
35 if process.id_ is None:
36 raise NotFoundException('Process of Todo without ID (not saved?)')
37 self.process = process
38 self._is_done = is_done
40 self.children: list[Todo] = []
41 self.parents: list[Todo] = []
42 self.conditions: list[Condition] = []
43 self.enables: list[Condition] = []
44 self.disables: list[Condition] = []
46 self.conditions = self.process.conditions[:]
47 self.enables = self.process.enables[:]
48 self.disables = self.process.disables[:]
51 def from_table_row(cls, db_conn: DatabaseConnection,
52 row: Row | list[Any]) -> Todo:
53 """Make from DB row, with dependencies."""
55 raise NotFoundException('calling Todo of '
57 row_as_list = list(row)
58 row_as_list[1] = Process.by_id(db_conn, row[1])
59 todo = super().from_table_row(db_conn, row_as_list)
60 assert isinstance(todo.id_, int)
61 for t_id in db_conn.column_where('todo_children', 'child',
63 # pylint: disable=no-member
64 todo.children += [cls.by_id(db_conn, t_id)]
65 for t_id in db_conn.column_where('todo_children', 'parent',
67 # pylint: disable=no-member
68 todo.parents += [cls.by_id(db_conn, t_id)]
69 for name in ('conditions', 'enables', 'disables'):
70 table = f'todo_{name}'
71 assert isinstance(todo.id_, int)
72 for cond_id in db_conn.column_where(table, 'condition',
74 target = getattr(todo, name)
75 target += [Condition.by_id(db_conn, cond_id)]
79 def by_date(cls, db_conn: DatabaseConnection, date: str) -> list[Todo]:
80 """Collect all Todos for Day of date."""
82 for id_ in db_conn.column_where('todos', 'id', 'day', date):
83 todos += [cls.by_id(db_conn, id_)]
87 def is_doable(self) -> bool:
88 """Decide whether .is_done settable based on children, Conditions."""
89 for child in self.children:
92 for condition in self.conditions:
93 if not condition.is_active:
98 def process_id(self) -> int | str | None:
99 """Needed for super().save to save Processes as attributes."""
100 return self.process.id_
103 def unsatisfied_dependencies(self) -> list[int]:
104 """Return Process IDs of .process.explicit_steps not in .children."""
105 unsatisfied = [s.step_process_id for s in self.process.explicit_steps
106 if s.parent_step_id is None]
107 for child_process_id in [c.process.id_ for c in self.children]:
108 if child_process_id in unsatisfied:
109 unsatisfied.remove(child_process_id)
113 def is_done(self) -> bool:
114 """Wrapper around self._is_done so we can control its setter."""
118 def is_done(self, value: bool) -> None:
119 if value != self.is_done and not self.is_doable:
120 raise BadFormatException('cannot change doneness of undoable Todo')
121 if self._is_done != value:
122 self._is_done = value
124 for condition in self.enables:
125 condition.is_active = True
126 for condition in self.disables:
127 condition.is_active = False
129 def adopt_from(self, todos: list[Todo]) -> bool:
130 """As far as possible, fill unsatisfied dependencies from todos."""
132 for process_id in self.unsatisfied_dependencies:
133 for todo in [t for t in todos if t.process.id_ == process_id
134 and t not in self.children]:
140 def make_missing_children(self, db_conn: DatabaseConnection) -> None:
141 """Fill unsatisfied dependencies with new Todos."""
142 for process_id in self.unsatisfied_dependencies:
143 process = Process.by_id(db_conn, process_id)
144 todo = self.__class__(None, process, False, self.date)
148 def get_step_tree(self, seen_todos: set[int]) -> TodoNode:
149 """Return tree of depended-on Todos."""
151 def make_node(todo: Todo) -> TodoNode:
153 seen = todo.id_ in seen_todos
154 assert isinstance(todo.id_, int)
155 seen_todos.add(todo.id_)
156 for child in todo.children:
157 children += [make_node(child)]
158 return TodoNode(todo, seen, children)
160 return make_node(self)
162 def add_child(self, child: Todo) -> None:
163 """Add child to self.children, avoid recursion, update parenthoods."""
165 def walk_steps(node: Todo) -> None:
166 if node.id_ == self.id_:
167 raise BadFormatException('bad child choice causes recursion')
168 for child in node.children:
172 raise HandledException('Can only add children to saved Todos.')
173 if child.id_ is None:
174 raise HandledException('Can only add saved children to Todos.')
175 if child in self.children:
176 raise BadFormatException('cannot adopt same child twice')
178 self.children += [child]
179 child.parents += [self]
181 def remove_child(self, child: Todo) -> None:
182 """Remove child from self.children, update counter relations."""
183 if child not in self.children:
184 raise HandledException('Cannot remove un-parented child.')
185 self.children.remove(child)
186 child.parents.remove(self)
188 def remove(self, db_conn: DatabaseConnection) -> None:
189 """Remove from DB, including relations."""
190 children_to_remove = self.children[:]
191 parents_to_remove = self.parents[:]
192 for child in children_to_remove:
193 self.remove_child(child)
194 for parent in parents_to_remove:
195 parent.remove_child(self)
196 super().remove(db_conn)