77 lines
2.5 KiB
Python
77 lines
2.5 KiB
Python
from __future__ import annotations
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from dataclasses import dataclass, field, replace
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from decimal import Decimal
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from domain.framework.entity import Entity
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from domain.marketplace.classified_ad_id import ClassifiedAdId
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from domain.marketplace.classified_ad_state import ClassifiedAdState
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from domain.marketplace.classified_ad_text import ClassifiedAdText
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from domain.marketplace.classified_ad_title import ClassifiedAdTitle
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from domain.marketplace.domain_event import (
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ClassifiedAdPriceUpdated,
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ClassifiedAdSentForReview,
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ClassifiedAdTextUpdated,
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ClassifiedAdTitleChanged,
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DomainEvent,
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)
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from domain.marketplace.invalid_entity_state_exception import (
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InvalidEntityStateException,
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)
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from domain.marketplace.price import Price
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from domain.marketplace.user_id import UserId
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@dataclass(frozen=True)
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class ClassifiedAd(Entity):
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id: ClassifiedAdId
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_ownerId: UserId
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title: ClassifiedAdTitle
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text: ClassifiedAdText
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price: Price = field(default_factory=lambda: Price(amount=Decimal("0.00")))
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state: ClassifiedAdState | None = None
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_events: tuple[DomainEvent, ...] = ()
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def _ensure_valid_state(self):
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errors = []
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if not self.title.title:
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errors.append("title")
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if not self.text.text:
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errors.append("text")
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if self.price.amount <= 0:
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errors.append("price")
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if errors:
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raise InvalidEntityStateException(
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f"Cannot publish classified ad with missing or invalid: {', '.join(errors)}"
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)
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def request_to_publish(self):
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self._ensure_valid_state()
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updated = replace(self, state=ClassifiedAdState.PendingReview)
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return updated.raise_event(
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ClassifiedAdSentForReview(id=self.id.value)
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)
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def set_title(self, title: ClassifiedAdTitle) -> ClassifiedAd:
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updated = replace(self, title=title)
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updated._ensure_valid_state()
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return updated.raise_event(
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ClassifiedAdTitleChanged(id=self.id.value, title=title.title)
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)
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def update_text(self, text: ClassifiedAdText) -> ClassifiedAd:
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updated = replace(self, text=text)
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updated._ensure_valid_state()
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return updated.raise_event(
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ClassifiedAdTextUpdated(id=self.id.value, ad_text=text.text)
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)
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def update_price(self, price: Price) -> ClassifiedAd:
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updated = replace(self, price=price)
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updated._ensure_valid_state()
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return updated.raise_event(
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ClassifiedAdPriceUpdated(id=self.id.value, price=price.amount)
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)
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