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Improve placement of Todos and Conditions in Day view.
[plomtask] / plomtask / todos.py
index fd72af6bf8c0842f2a2727185c2b4c3f707a20d4..336ec0350830ce5dfbdf5e85a92b3945608835d9 100644 (file)
@@ -1,15 +1,20 @@
 """Actionables."""
 from __future__ import annotations
+from collections import namedtuple
 from typing import Any
 from sqlite3 import Row
 from plomtask.db import DatabaseConnection, BaseModel
 from plomtask.processes import Process
-from plomtask.conditions import Condition
+from plomtask.conditions import Condition, ConditionsRelations
 from plomtask.exceptions import (NotFoundException, BadFormatException,
                                  HandledException)
 
 
-class Todo(BaseModel):
+TodoStepsNode = namedtuple('TodoStepsNode',
+                           ('item', 'is_todo', 'children', 'seen'))
+
+
+class Todo(BaseModel, ConditionsRelations):
     """Individual actionable."""
 
     # pylint: disable=too-many-instance-attributes
@@ -26,12 +31,12 @@ class Todo(BaseModel):
         self.children: list[Todo] = []
         self.parents: list[Todo] = []
         self.conditions: list[Condition] = []
-        self.fulfills: list[Condition] = []
-        self.undoes: list[Condition] = []
+        self.enables: list[Condition] = []
+        self.disables: list[Condition] = []
         if not self.id_:
             self.conditions = process.conditions[:]
-            self.fulfills = process.fulfills[:]
-            self.undoes = process.undoes[:]
+            self.enables = process.enables[:]
+            self.disables = process.disables[:]
 
     @classmethod
     def from_table_row(cls, db_conn: DatabaseConnection,
@@ -59,7 +64,7 @@ class Todo(BaseModel):
             for t_id in db_conn.column_where('todo_children', 'parent',
                                              'child', id_):
                 todo.parents += [cls.by_id(db_conn, t_id)]
-            for name in ('conditions', 'fulfills', 'undoes'):
+            for name in ('conditions', 'enables', 'disables'):
                 table = f'todo_{name}'
                 for cond_id in db_conn.column_where(table, 'condition',
                                                     'todo', todo.id_):
@@ -76,31 +81,30 @@ class Todo(BaseModel):
             todos += [cls.by_id(db_conn, id_)]
         return todos
 
+    @staticmethod
+    def _x_ablers_for_at(db_conn: DatabaseConnection, name: str,
+                         cond: Condition, date: str) -> list[Todo]:
+        """Collect all Todos of day that [name] condition."""
+        assert isinstance(cond.id_, int)
+        x_ablers = []
+        table = f'todo_{name}'
+        for id_ in db_conn.column_where(table, 'todo', 'condition', cond.id_):
+            todo = Todo.by_id(db_conn, id_)
+            if todo.date == date:
+                x_ablers += [todo]
+        return x_ablers
+
     @classmethod
-    def enablers_for_at(cls, db_conn: DatabaseConnection, condition: Condition,
-                        date: str) -> list[Todo]:
+    def enablers_for_at(cls, db_conn: DatabaseConnection,
+                        condition: Condition, date: str) -> list[Todo]:
         """Collect all Todos of day that enable condition."""
-        assert isinstance(condition.id_, int)
-        enablers = []
-        for id_ in db_conn.column_where('todo_fulfills', 'todo', 'condition',
-                                        condition.id_):
-            todo = cls.by_id(db_conn, id_)
-            if todo.date == date:
-                enablers += [todo]
-        return enablers
+        return cls._x_ablers_for_at(db_conn, 'enables', condition, date)
 
     @classmethod
     def disablers_for_at(cls, db_conn: DatabaseConnection,
                          condition: Condition, date: str) -> list[Todo]:
         """Collect all Todos of day that disable condition."""
-        assert isinstance(condition.id_, int)
-        disablers = []
-        for id_ in db_conn.column_where('todo_undoes', 'todo', 'condition',
-                                        condition.id_):
-            todo = cls.by_id(db_conn, id_)
-            if todo.date == date:
-                disablers += [todo]
-        return disablers
+        return cls._x_ablers_for_at(db_conn, 'disables', condition, date)
 
     @property
     def is_doable(self) -> bool:
@@ -130,28 +134,40 @@ class Todo(BaseModel):
         if self._is_done != value:
             self._is_done = value
             if value is True:
-                for condition in self.fulfills:
+                for condition in self.enables:
                     condition.is_active = True
-                for condition in self.undoes:
+                for condition in self.disables:
                     condition.is_active = False
 
-    def set_undoes(self, db_conn: DatabaseConnection, ids: list[int]) -> None:
-        """Set self.undoes to Conditions identified by ids."""
-        self.set_conditions(db_conn, ids, 'undoes')
-
-    def set_fulfills(self, db_conn: DatabaseConnection,
-                     ids: list[int]) -> None:
-        """Set self.fulfills to Conditions identified by ids."""
-        self.set_conditions(db_conn, ids, 'fulfills')
-
-    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 get_step_tree(self, seen_todos: set[int],
+                      seen_conditions: set[int]) -> TodoStepsNode:
+        """Return tree of depended-on Todos and Conditions."""
+
+        def make_node(step: Todo | Condition) -> TodoStepsNode:
+            assert isinstance(step.id_, int)
+            is_todo = isinstance(step, Todo)
+            children = []
+            if is_todo:
+                assert isinstance(step, Todo)
+                seen = step.id_ in seen_todos
+                seen_todos.add(step.id_)
+                potentially_enabled = set()
+                for child in step.children:
+                    for condition in child.enables:
+                        potentially_enabled.add(condition)
+                    children += [make_node(child)]
+                for condition in [c for c in step.conditions
+                                  if (not c.is_active)
+                                  and (c not in potentially_enabled)]:
+                    children += [make_node(condition)]
+            else:
+                assert isinstance(step, Condition)
+                seen = step.id_ in seen_conditions
+                seen_conditions.add(step.id_)
+            return TodoStepsNode(step, is_todo, children, seen)
+
+        node = make_node(self)
+        return node
 
     def add_child(self, child: Todo) -> None:
         """Add child to self.children, guard against recursion"""
@@ -181,7 +197,7 @@ class Todo(BaseModel):
                                   [[c.id_] for c in self.children])
         db_conn.rewrite_relations('todo_conditions', 'todo', self.id_,
                                   [[c.id_] for c in self.conditions])
-        db_conn.rewrite_relations('todo_fulfills', 'todo', self.id_,
-                                  [[c.id_] for c in self.fulfills])
-        db_conn.rewrite_relations('todo_undoes', 'todo', self.id_,
-                                  [[c.id_] for c in self.undoes])
+        db_conn.rewrite_relations('todo_enables', 'todo', self.id_,
+                                  [[c.id_] for c in self.enables])
+        db_conn.rewrite_relations('todo_disables', 'todo', self.id_,
+                                  [[c.id_] for c in self.disables])