Add events

backend/app/models/swap_request.py

@@ -0,0 +1,62 @@
+from datetime import datetime
+from enum import Enum
+from sqlalchemy import DateTime, ForeignKey, String
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.core.database import Base
+
+
+class SwapRequestStatus(str, Enum):
+    PENDING = "pending"
+    ACCEPTED = "accepted"
+    DECLINED = "declined"
+    CANCELLED = "cancelled"  # Cancelled by requester or event ended
+
+
+class SwapRequest(Base):
+    __tablename__ = "swap_requests"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    event_id: Mapped[int] = mapped_column(
+        ForeignKey("events.id", ondelete="CASCADE"),
+        index=True
+    )
+    from_participant_id: Mapped[int] = mapped_column(
+        ForeignKey("participants.id", ondelete="CASCADE"),
+        index=True
+    )
+    to_participant_id: Mapped[int] = mapped_column(
+        ForeignKey("participants.id", ondelete="CASCADE"),
+        index=True
+    )
+    from_assignment_id: Mapped[int] = mapped_column(
+        ForeignKey("assignments.id", ondelete="CASCADE")
+    )
+    to_assignment_id: Mapped[int] = mapped_column(
+        ForeignKey("assignments.id", ondelete="CASCADE")
+    )
+    status: Mapped[str] = mapped_column(
+        String(20),
+        default=SwapRequestStatus.PENDING.value
+    )
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+    responded_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
+
+    # Relationships
+    event: Mapped["Event"] = relationship("Event")
+    from_participant: Mapped["Participant"] = relationship(
+        "Participant",
+        foreign_keys=[from_participant_id]
+    )
+    to_participant: Mapped["Participant"] = relationship(
+        "Participant",
+        foreign_keys=[to_participant_id]
+    )
+    from_assignment: Mapped["Assignment"] = relationship(
+        "Assignment",
+        foreign_keys=[from_assignment_id]
+    )
+    to_assignment: Mapped["Assignment"] = relationship(
+        "Assignment",
+        foreign_keys=[to_assignment_id]
+    )