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[plomtask] / plomtask / todos.py
index 80dc97c25ac481089b5760a0c8072af5f755ef08..705bd725e2ff662ab4f9f2e370e61169a413ff03 100644 (file)
 """Actionables."""
 from __future__ import annotations
 from dataclasses import dataclass
-from typing import Any
+from typing import Any, Set
 from sqlite3 import Row
 from plomtask.db import DatabaseConnection, BaseModel
-from plomtask.processes import Process
+from plomtask.processes import Process, ProcessStepsNode
+from plomtask.versioned_attributes import VersionedAttribute
 from plomtask.conditions import Condition, ConditionsRelations
 from plomtask.exceptions import (NotFoundException, BadFormatException,
                                  HandledException)
+from plomtask.dating import valid_date
 
 
 @dataclass
-class TodoStepsNode:
+class TodoNode:
     """Collects what's useful to know for Todo/Condition tree display."""
-    item: Todo | Condition
-    is_todo: bool
-    children: list[TodoStepsNode]
+    todo: Todo
     seen: bool
+    children: list[TodoNode]
 
 
-class Todo(BaseModel, ConditionsRelations):
+class Todo(BaseModel[int], ConditionsRelations):
     """Individual actionable."""
-
     # pylint: disable=too-many-instance-attributes
-
+    # pylint: disable=too-many-public-methods
     table_name = 'todos'
-    to_save = ['process_id', 'is_done', 'date']
+    to_save = ['process_id', 'is_done', 'date', 'comment', 'effort',
+               'calendarize']
+    to_save_relations = [('todo_conditions', 'todo', 'conditions', 0),
+                         ('todo_blockers', 'todo', 'blockers', 0),
+                         ('todo_enables', 'todo', 'enables', 0),
+                         ('todo_disables', 'todo', 'disables', 0),
+                         ('todo_children', 'parent', 'children', 0),
+                         ('todo_children', 'child', 'parents', 1)]
+    to_search = ['comment']
+    days_to_update: Set[str] = set()
+    children: list[Todo]
+    parents: list[Todo]
 
-    def __init__(self, id_: int | None, process: Process,
-                 is_done: bool, date: str) -> None:
-        self.set_int_id(id_)
+    # pylint: disable=too-many-arguments
+    def __init__(self, id_: int | None,
+                 process: Process,
+                 is_done: bool,
+                 date: str, comment: str = '',
+                 effort: None | float = None,
+                 calendarize: bool = False) -> None:
+        BaseModel.__init__(self, id_)
+        ConditionsRelations.__init__(self)
+        if process.id_ is None:
+            raise NotFoundException('Process of Todo without ID (not saved?)')
         self.process = process
         self._is_done = is_done
-        self.date = date
-        self.children: list[Todo] = []
-        self.parents: list[Todo] = []
-        self.conditions: list[Condition] = []
-        self.enables: list[Condition] = []
-        self.disables: list[Condition] = []
+        self.date = valid_date(date)
+        self.comment = comment
+        self.effort = effort
+        self.children = []
+        self.parents = []
+        self.calendarize = calendarize
         if not self.id_:
+            self.calendarize = self.process.calendarize
             self.conditions = self.process.conditions[:]
+            self.blockers = self.process.blockers[:]
             self.enables = self.process.enables[:]
             self.disables = self.process.disables[:]
 
+    @classmethod
+    def by_date_range(cls, db_conn: DatabaseConnection,
+                      date_range: tuple[str, str] = ('', '')) -> list[Todo]:
+        """Collect Todos of Days within date_range."""
+        todos, _, _ = cls.by_date_range_with_limits(db_conn, date_range)
+        return todos
+
+    @classmethod
+    def create_with_children(cls, db_conn: DatabaseConnection,
+                             process_id: int, date: str) -> Todo:
+        """Create Todo of process for date, ensure children."""
+
+        def key_order_func(n: ProcessStepsNode) -> int:
+            assert isinstance(n.process.id_, int)
+            return n.process.id_
+
+        def walk_steps(parent: Todo, step_node: ProcessStepsNode) -> Todo:
+            adoptables = [t for t in cls.by_date(db_conn, date)
+                          if (t not in parent.children)
+                          and (t != parent)
+                          and step_node.process == t.process]
+            satisfier = None
+            for adoptable in adoptables:
+                satisfier = adoptable
+                break
+            if not satisfier:
+                satisfier = cls(None, step_node.process, False, date)
+                satisfier.save(db_conn)
+            sub_step_nodes = list(step_node.steps.values())
+            sub_step_nodes.sort(key=key_order_func)
+            for sub_node in sub_step_nodes:
+                if sub_node.is_suppressed:
+                    continue
+                n_slots = len([n for n in sub_step_nodes
+                               if n.process == sub_node.process])
+                filled_slots = len([t for t in satisfier.children
+                                    if t.process == sub_node.process])
+                # if we did not newly create satisfier, it may already fill
+                # some step dependencies, so only fill what remains open
+                if n_slots - filled_slots > 0:
+                    satisfier.add_child(walk_steps(satisfier, sub_node))
+            satisfier.save(db_conn)
+            return satisfier
+
+        process = Process.by_id(db_conn, process_id)
+        todo = cls(None, process, False, date)
+        todo.save(db_conn)
+        steps_tree = process.get_steps(db_conn)
+        for step_node in steps_tree.values():
+            if step_node.is_suppressed:
+                continue
+            todo.add_child(walk_steps(todo, step_node))
+        todo.save(db_conn)
+        return todo
+
     @classmethod
     def from_table_row(cls, db_conn: DatabaseConnection,
                        row: Row | list[Any]) -> Todo:
-        """Make from DB row, write to DB cache."""
+        """Make from DB row, with dependencies."""
         if row[1] == 0:
             raise NotFoundException('calling Todo of '
                                     'unsaved Process')
         row_as_list = list(row)
         row_as_list[1] = Process.by_id(db_conn, row[1])
         todo = super().from_table_row(db_conn, row_as_list)
-        assert isinstance(todo, Todo)
+        assert isinstance(todo.id_, int)
+        for t_id in db_conn.column_where('todo_children', 'child',
+                                         'parent', todo.id_):
+            todo.children += [cls.by_id(db_conn, t_id)]
+        for t_id in db_conn.column_where('todo_children', 'parent',
+                                         'child', todo.id_):
+            todo.parents += [cls.by_id(db_conn, t_id)]
+        for name in ('conditions', 'blockers', 'enables', 'disables'):
+            table = f'todo_{name}'
+            assert isinstance(todo.id_, int)
+            for cond_id in db_conn.column_where(table, 'condition',
+                                                'todo', todo.id_):
+                target = getattr(todo, name)
+                target += [Condition.by_id(db_conn, cond_id)]
         return todo
 
     @classmethod
-    def by_id(cls, db_conn: DatabaseConnection, id_: int) -> Todo:
-        """Get Todo of .id_=id_ and children (from DB cache if possible)."""
-        todo, from_cache = super()._by_id(db_conn, id_)
-        if todo is None:
-            raise NotFoundException(f'Todo of ID not found: {id_}')
-        if not from_cache:
-            for t_id in db_conn.column_where('todo_children', 'child',
-                                             'parent', id_):
-                todo.children += [cls.by_id(db_conn, t_id)]
-            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', 'enables', 'disables'):
-                table = f'todo_{name}'
-                for cond_id in db_conn.column_where(table, 'condition',
-                                                    'todo', todo.id_):
-                    target = getattr(todo, name)
-                    target += [Condition.by_id(db_conn, cond_id)]
-        assert isinstance(todo, Todo)
-        return todo
+    def by_process_id(cls, db_conn: DatabaseConnection,
+                      process_id: int | None) -> list[Todo]:
+        """Collect all Todos of Process of process_id."""
+        return [t for t in cls.all(db_conn) if t.process.id_ == process_id]
 
     @classmethod
     def by_date(cls, db_conn: DatabaseConnection, date: str) -> list[Todo]:
         """Collect all Todos for Day of date."""
-        todos = []
-        for id_ in db_conn.column_where('todos', 'id', 'day', date):
-            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]:
-        """Collect all Todos of day that enable condition."""
-        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."""
-        return cls._x_ablers_for_at(db_conn, 'disables', condition, date)
+        return cls.by_date_range(db_conn, (date, date))
 
     @property
     def is_doable(self) -> bool:
@@ -120,23 +165,33 @@ class Todo(BaseModel, ConditionsRelations):
         for condition in self.conditions:
             if not condition.is_active:
                 return False
+        for condition in self.blockers:
+            if condition.is_active:
+                return False
         return True
 
     @property
-    def process_id(self) -> int | str | None:
-        """Return ID of tasked Process."""
-        return self.process.id_
+    def is_deletable(self) -> bool:
+        """Decide whether self be deletable (not if preserve-worthy values)."""
+        if self.comment:
+            return False
+        if self.effort and self.effort >= 0:
+            return False
+        return True
 
     @property
-    def unsatisfied_dependencies(self) -> list[int]:
-        """Return Process IDs of .process.explicit_steps not in .children."""
-        unsatisfied = [s.step_process_id for s in self.process.explicit_steps
-                       if s.parent_step_id is None]
-        for child_process_id in [c.process.id_ for c in self.children]:
-            if child_process_id in unsatisfied:
-                assert isinstance(child_process_id, int)
-                unsatisfied.remove(child_process_id)
-        return unsatisfied
+    def performed_effort(self) -> float:
+        """Return performed effort, i.e. self.effort or default if done.."""
+        if self.effort is not None:
+            return self.effort
+        if self.is_done:
+            return self.effort_then
+        return 0
+
+    @property
+    def process_id(self) -> int | str | None:
+        """Needed for super().save to save Processes as attributes."""
+        return self.process.id_
 
     @property
     def is_done(self) -> bool:
@@ -155,51 +210,62 @@ class Todo(BaseModel, ConditionsRelations):
                 for condition in self.disables:
                     condition.is_active = False
 
-    def adopt_from(self, todos: list[Todo]) -> None:
-        """As far as possible, fill unsatisfied dependencies from todos."""
-        for process_id in self.unsatisfied_dependencies:
-            for todo in [t for t in todos if t.process.id_ == process_id
-                         and t not in self.children]:
-                self.add_child(todo)
-                break
+    @property
+    def title(self) -> VersionedAttribute:
+        """Shortcut to .process.title."""
+        return self.process.title
 
-    def make_missing_children(self, db_conn: DatabaseConnection) -> None:
-        """Fill unsatisfied dependencies with new Todos."""
-        for process_id in self.unsatisfied_dependencies:
-            process = Process.by_id(db_conn, process_id)
-            todo = self.__class__(None, process, False, self.date)
-            todo.save(db_conn)
-            self.add_child(todo)
-
-    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)
+    @property
+    def title_then(self) -> str:
+        """Shortcut to .process.title.at(self.date)"""
+        title_then = self.process.title.at(self.date)
+        assert isinstance(title_then, str)
+        return title_then
+
+    @property
+    def effort_then(self) -> float:
+        """Shortcut to .process.effort.at(self.date)"""
+        effort_then = self.process.effort.at(self.date)
+        assert isinstance(effort_then, float)
+        return effort_then
+
+    @property
+    def has_doneness_in_path(self) -> bool:
+        """Check whether self is done or has any children that are."""
+        if self.is_done:
+            return True
+        for child in self.children:
+            if child.is_done:
+                return True
+            if child.has_doneness_in_path:
+                return True
+        return False
+
+    def get_step_tree(self, seen_todos: set[int]) -> TodoNode:
+        """Return tree of depended-on Todos."""
+
+        def make_node(todo: Todo) -> TodoNode:
             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
+            seen = todo.id_ in seen_todos
+            assert isinstance(todo.id_, int)
+            seen_todos.add(todo.id_)
+            for child in todo.children:
+                children += [make_node(child)]
+            return TodoNode(todo, seen, children)
+
+        return make_node(self)
+
+    @property
+    def tree_effort(self) -> float:
+        """Return sum of performed efforts of self and all descendants."""
+
+        def walk_tree(node: Todo) -> float:
+            local_effort = 0.0
+            for child in node.children:
+                local_effort += walk_tree(child)
+            return node.performed_effort + local_effort
+
+        return walk_tree(self)
 
     def add_child(self, child: Todo) -> None:
         """Add child to self.children, avoid recursion, update parenthoods."""
@@ -228,17 +294,25 @@ class Todo(BaseModel, ConditionsRelations):
         child.parents.remove(self)
 
     def save(self, db_conn: DatabaseConnection) -> None:
-        """Write self and children to DB and its cache."""
-        if self.process.id_ is None:
-            raise NotFoundException('Process of Todo without ID (not saved?)')
-        self.save_core(db_conn)
-        assert isinstance(self.id_, int)
-        db_conn.cached_todos[self.id_] = self
-        db_conn.rewrite_relations('todo_children', 'parent', self.id_,
-                                  [[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_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])
+        """On save calls, also check if auto-deletion by effort < 0."""
+        if self.effort and self.effort < 0 and self.is_deletable:
+            self.remove(db_conn)
+            return
+        if self.id_ is None:
+            self.__class__.days_to_update.add(self.date)
+        super().save(db_conn)
+        for condition in self.enables + self.disables + self.conditions:
+            condition.save(db_conn)
+
+    def remove(self, db_conn: DatabaseConnection) -> None:
+        """Remove from DB, including relations."""
+        if not self.is_deletable:
+            raise HandledException('Cannot remove non-deletable Todo.')
+        self.__class__.days_to_update.add(self.date)
+        children_to_remove = self.children[:]
+        parents_to_remove = self.parents[:]
+        for child in children_to_remove:
+            self.remove_child(child)
+        for parent in parents_to_remove:
+            parent.remove_child(self)
+        super().remove(db_conn)