feat: handle unsubscribe

src/domain/__init__.py

@@ -11,6 +11,7 @@ __all__ = (
     'TargetChannelStatus',
     'CreativeStatus',
     'PlacementStatus',
+    'SubscriptionStatus',
     'InviteLinkType',
     'PostViewsAvailability',
     'LoginToken',
@@ -49,6 +50,6 @@ from .login_token import LoginToken
 from .placement import InviteLinkType, Placement, PlacementStatus, PostViewsAvailability
 from .placement_views_history import PlacementViewsHistory
 from .subscriber import Subscriber
-from .subscription import Subscription
+from .subscription import Subscription, SubscriptionStatus
 from .target_channel import TargetChannel, TargetChannelStatus
 from .user import User

src/domain/base.py

@@ -8,7 +8,6 @@ from sqlalchemy.types import DateTime
 
 
 def _camel_to_snake(name: str) -> str:
-    """Convert CamelCase to snake_case."""
     name = re.sub('(.)([A-Z][a-z]+)', r'\1_\2', name)
     return re.sub('([a-z0-9])([A-Z])', r'\1_\2', name).lower()
 

src/domain/subscription.py

@@ -1,4 +1,6 @@
+import datetime
 import uuid
+from enum import StrEnum
 from typing import TYPE_CHECKING
 
 from sqlalchemy import ForeignKey
@@ -11,10 +13,18 @@ if TYPE_CHECKING:
     from .subscriber import Subscriber
 
 
+class SubscriptionStatus(StrEnum):
+    ACTIVE = 'active'
+    UNSUBSCRIBED = 'unsubscribed'
+
+
 class Subscription(domain.Base):
     placement_id: Mapped[uuid.UUID] = mapped_column(ForeignKey('placement.id'), index=True)
     subscriber_id: Mapped[uuid.UUID] = mapped_column(ForeignKey('subscriber.id'), index=True)
+    target_channel_id: Mapped[uuid.UUID] = mapped_column(ForeignKey('target_channel.id'), index=True)
     invite_link: Mapped[str] = mapped_column(index=True)  # По которой пришёл пользователь
+    status: Mapped[SubscriptionStatus] = mapped_column(default=SubscriptionStatus.ACTIVE)
+    unsubscribed_at: Mapped[datetime.datetime | None]
 
     # Relationships
     placement: Mapped['Placement'] = relationship(back_populates='subscriptions')