feat: creatives and external channels

src/domain/target_channel.py

@@ -0,0 +1,44 @@
+import uuid
+from enum import StrEnum
+from typing import TYPE_CHECKING
+
+from sqlalchemy import BigInteger, ForeignKey
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from src import domain
+
+if TYPE_CHECKING:
+    from . import ExternalChannel, creative, user
+
+
+class TargetChannelStatus(StrEnum):
+    ACTIVE = 'active'
+    INACTIVE = 'inactive'
+    ARCHIVED = 'archived'
+
+
+class TargetChannel(domain.Base):
+    telegram_id: Mapped[int] = mapped_column(BigInteger, unique=True, index=True)
+    title: Mapped[str]
+    username: Mapped[str | None] = mapped_column(index=True)
+    status: Mapped[TargetChannelStatus]
+
+    # Relationship with user
+    user_id: Mapped[uuid.UUID] = mapped_column(ForeignKey('users.id'), index=True)
+    user: Mapped['user.User'] = relationship(back_populates='target_channels')
+
+    # M2M relationship with external channels
+    external_channels: Mapped[list['ExternalChannel']] = relationship(
+        secondary='target_channel_external_channels',
+        back_populates='target_channels',
+    )
+
+    creatives: Mapped[list['creative.Creative']] = relationship(back_populates='target_channel')
+
+    @property
+    def is_active(self) -> bool:
+        return self.status == domain.TargetChannelStatus.ACTIVE
+
+    @is_active.setter
+    def is_active(self, value: bool) -> None:
+        self.status = domain.TargetChannelStatus.ACTIVE if value else domain.TargetChannelStatus.INACTIVE