X-Git-Url: https://plomlompom.com/repos/?a=blobdiff_plain;f=plomtask%2Fprocesses.py;h=1778e4f73b8eff992322b9b1e166f6987047e05d;hb=83266154e9140151c975586d21f393a5eb3f4ef4;hp=9705f17a5672336371ba186ff5d52cdd5fe002ef;hpb=7eb81e526c45118a295dbfc12be01f92dc809974;p=plomtask diff --git a/plomtask/processes.py b/plomtask/processes.py index 9705f17..1778e4f 100644 --- a/plomtask/processes.py +++ b/plomtask/processes.py @@ -1,11 +1,13 @@ """Collecting Processes and Process-related items.""" from __future__ import annotations from dataclasses import dataclass -from typing import Set +from typing import Set, Any +from sqlite3 import Row from plomtask.db import DatabaseConnection, BaseModel -from plomtask.misc import VersionedAttribute +from plomtask.versioned_attributes import VersionedAttribute from plomtask.conditions import Condition, ConditionsRelations -from plomtask.exceptions import NotFoundException, BadFormatException +from plomtask.exceptions import (NotFoundException, BadFormatException, + HandledException) @dataclass @@ -21,11 +23,15 @@ class ProcessStepsNode: class Process(BaseModel[int], ConditionsRelations): """Template for, and metadata for, Todos, and their arrangements.""" table_name = 'processes' + to_save_versioned = ['title', 'description', 'effort'] + to_save_relations = [('process_conditions', 'process', 'conditions'), + ('process_enables', 'process', 'enables'), + ('process_disables', 'process', 'disables')] # pylint: disable=too-many-instance-attributes def __init__(self, id_: int | None) -> None: - self.set_int_id(id_) + super().__init__(id_) self.title = VersionedAttribute(self, 'process_titles', 'UNNAMED') self.description = VersionedAttribute(self, 'process_descriptions', '') self.effort = VersionedAttribute(self, 'process_efforts', 1.0) @@ -35,34 +41,26 @@ class Process(BaseModel[int], ConditionsRelations): self.disables: list[Condition] = [] @classmethod - def by_id(cls, db_conn: DatabaseConnection, id_: int | None, - create: bool = False) -> Process: - """Collect Process, its VersionedAttributes, and its child IDs.""" - process = None - from_cache = False - if id_: - process, from_cache = super()._by_id(db_conn, id_) - if not from_cache: - if not process: - if not create: - raise NotFoundException(f'Process not found of id: {id_}') - process = Process(id_) - if isinstance(process.id_, int): - for name in ('title', 'description', 'effort'): - table = f'process_{name}s' - for row in db_conn.row_where(table, 'parent', process.id_): - getattr(process, name).history_from_row(row) - for row in db_conn.row_where('process_steps', 'owner', - process.id_): - step = ProcessStep.from_table_row(db_conn, row) - process.explicit_steps += [step] - for name in ('conditions', 'enables', 'disables'): - table = f'process_{name}' - for c_id in db_conn.column_where(table, 'condition', - 'process', process.id_): - target = getattr(process, name) - target += [Condition.by_id(db_conn, c_id)] - assert isinstance(process, Process) + def from_table_row(cls, db_conn: DatabaseConnection, + row: Row | list[Any]) -> Process: + """Make from DB row, with dependencies.""" + process = super().from_table_row(db_conn, row) + assert isinstance(process.id_, int) + for name in ('title', 'description', 'effort'): + table = f'process_{name}s' + for row_ in db_conn.row_where(table, 'parent', process.id_): + getattr(process, name).history_from_row(row_) + for row_ in db_conn.row_where('process_steps', 'owner', + process.id_): + step = ProcessStep.from_table_row(db_conn, row_) + process.explicit_steps += [step] # pylint: disable=no-member + for name in ('conditions', 'enables', 'disables'): + table = f'process_{name}' + assert isinstance(process.id_, int) + for c_id in db_conn.column_where(table, 'condition', + 'process', process.id_): + target = getattr(process, name) + target += [Condition.by_id(db_conn, c_id)] return process def used_as_step_by(self, db_conn: DatabaseConnection) -> list[Process]: @@ -161,21 +159,26 @@ class Process(BaseModel[int], ConditionsRelations): def save(self, db_conn: DatabaseConnection) -> None: """Add (or re-write) self and connected items to DB.""" - self.save_core(db_conn) + super().save(db_conn) assert isinstance(self.id_, int) - self.title.save(db_conn) - self.description.save(db_conn) - self.effort.save(db_conn) - db_conn.rewrite_relations('process_conditions', 'process', self.id_, - [[c.id_] for c in self.conditions]) - db_conn.rewrite_relations('process_enables', 'process', self.id_, - [[c.id_] for c in self.enables]) - db_conn.rewrite_relations('process_disables', 'process', self.id_, - [[c.id_] for c in self.disables]) db_conn.delete_where('process_steps', 'owner', self.id_) for step in self.explicit_steps: step.save(db_conn) + def remove(self, db_conn: DatabaseConnection) -> None: + """Remove from DB, with dependencies. + + Guard against removal of Processes in use. + """ + assert isinstance(self.id_, int) + for _ in db_conn.row_where('process_steps', 'step_process', self.id_): + raise HandledException('cannot remove Process in use') + for _ in db_conn.row_where('todos', 'process', self.id_): + raise HandledException('cannot remove Process in use') + for step in self.explicit_steps: + step.remove(db_conn) + super().remove(db_conn) + class ProcessStep(BaseModel[int]): """Sub-unit of Processes.""" @@ -184,19 +187,13 @@ class ProcessStep(BaseModel[int]): def __init__(self, id_: int | None, owner_id: int, step_process_id: int, parent_step_id: int | None) -> None: - self.set_int_id(id_) + super().__init__(id_) self.owner_id = owner_id self.step_process_id = step_process_id self.parent_step_id = parent_step_id - @classmethod - def by_id(cls, db_conn: DatabaseConnection, id_: int) -> ProcessStep: - """Retrieve ProcessStep by id_, or throw NotFoundException.""" - step, _ = super()._by_id(db_conn, id_) - if step: - return step - raise NotFoundException(f'found no ProcessStep of ID {id_}') - - def save(self, db_conn: DatabaseConnection) -> None: - """Default to simply calling self.save_core for simple cases.""" - self.save_core(db_conn) + def remove(self, db_conn: DatabaseConnection) -> None: + """Remove from DB, and owner's .explicit_steps.""" + owner = Process.by_id(db_conn, self.owner_id) + owner.explicit_steps.remove(self) + super().remove(db_conn)