Classic Domain

Основывается на книге Эрика Эванса "Domain Driven Design: tackling complexity in the heart of software".

Предоставляет базовые примитивы для описания языка предметной области -

• Value (Объект-значение)
• Entity (Сущность)
• Root (Корень агрегата)
• Repository (Хранилище)
• Criteria (Критерий)

Пример:

from datetime import datetime
from dataclasses import dataclass
from classic.domain.criteria import Criteria


@dataclass
class Task:
    created_at: datetime
    finished_at: datetime


@dataclass
class TaskOlderThan(Criteria[Task]):
    date: datetime

    def is_satisfied_by(self, candidate: Task) -> bool:
        return candidate.created_at < self.date


@dataclass
class TaskObsolete(Criteria[Task]):
    days_to_work: int

    def is_satisfied_by(self, candidate: Task) -> bool:
        days_spent = candidate.finished_at - candidate.created_at
        return days_spent.days > self.days_to_work


some_task = Task(
    created_at=datetime(2024, 1, 1),
    finished_at=datetime(2024, 1, 10),
)
criteria = TaskObsolete(3) & TaskOlderThan(datetime(2024, 1, 31))
assert criteria.is_satisfied_by(some_task)

some_task = Task(
    created_at=datetime(2024, 1, 1),
    finished_at=datetime(2024, 1, 1),
)
criteria = TaskObsolete(3) & TaskOlderThan(datetime(2024, 1, 31))
assert not criteria.is_satisfied_by(some_task)