feat(sub): subscription logic (pre release)

db/models/subscriptions.py

@@ -0,0 +1,33 @@
+import datetime
+from typing import TYPE_CHECKING
+
+from sqlalchemy import INTEGER, DateTime, Enum, ForeignKey
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from db.base import Base
+from schemas.enums import SubscriptionStatus
+
+if TYPE_CHECKING:
+    from db.models import SubscriptionAddon, User
+
+
+class Subscription(Base):
+    __tablename__ = "subscriptions"
+
+    id: Mapped[int] = mapped_column(
+        INTEGER, nullable=False, autoincrement=True, unique=True, primary_key=True
+    )
+    user_id: Mapped[int] = mapped_column(ForeignKey("users.id"), nullable=False, unique=True)
+
+    devices: Mapped[int] = mapped_column(INTEGER, nullable=False)
+    status: Mapped[SubscriptionStatus] = mapped_column(
+        Enum(SubscriptionStatus, name="subscriptionstatus"),
+        nullable=False,
+        default=SubscriptionStatus.EXPIRED,
+    )
+    expires_at: Mapped[datetime.datetime] = mapped_column(DateTime(True), nullable=False)
+
+    user: Mapped["User"] = relationship("User", back_populates="subscription", lazy="selectin")
+    addons: Mapped[list["SubscriptionAddon"]] = relationship(
+        "SubscriptionAddon", back_populates="subscription", lazy="selectin"
+    )