refactors

backend/mappers.py

@@ -0,0 +1,91 @@
+"""Response mappers for converting models to API response schemas."""
+
+from models import Exchange, Invite
+from schemas import (
+    AdminExchangeResponse,
+    ExchangeResponse,
+    ExchangeUserContact,
+    InviteResponse,
+)
+
+
+class ExchangeMapper:
+    """Mapper for Exchange model to response schemas."""
+
+    @staticmethod
+    def to_response(
+        exchange: Exchange,
+        user_email: str | None = None,
+    ) -> ExchangeResponse:
+        """Convert an Exchange model to ExchangeResponse schema."""
+        email = user_email if user_email is not None else exchange.user.email
+        return ExchangeResponse(
+            id=exchange.id,
+            public_id=str(exchange.public_id),
+            user_id=exchange.user_id,
+            user_email=email,
+            slot_start=exchange.slot_start,
+            slot_end=exchange.slot_end,
+            direction=exchange.direction.value,
+            bitcoin_transfer_method=exchange.bitcoin_transfer_method.value,
+            eur_amount=exchange.eur_amount,
+            sats_amount=exchange.sats_amount,
+            market_price_eur=exchange.market_price_eur,
+            agreed_price_eur=exchange.agreed_price_eur,
+            premium_percentage=exchange.premium_percentage,
+            status=exchange.status.value,
+            created_at=exchange.created_at,
+            cancelled_at=exchange.cancelled_at,
+            completed_at=exchange.completed_at,
+        )
+
+    @staticmethod
+    def to_admin_response(exchange: Exchange) -> AdminExchangeResponse:
+        """Convert an Exchange model to AdminExchangeResponse with user contact."""
+        user = exchange.user
+        return AdminExchangeResponse(
+            id=exchange.id,
+            public_id=str(exchange.public_id),
+            user_id=exchange.user_id,
+            user_email=user.email,
+            user_contact=ExchangeUserContact(
+                email=user.email,
+                contact_email=user.contact_email,
+                telegram=user.telegram,
+                signal=user.signal,
+                nostr_npub=user.nostr_npub,
+            ),
+            slot_start=exchange.slot_start,
+            slot_end=exchange.slot_end,
+            direction=exchange.direction.value,
+            bitcoin_transfer_method=exchange.bitcoin_transfer_method.value,
+            eur_amount=exchange.eur_amount,
+            sats_amount=exchange.sats_amount,
+            market_price_eur=exchange.market_price_eur,
+            agreed_price_eur=exchange.agreed_price_eur,
+            premium_percentage=exchange.premium_percentage,
+            status=exchange.status.value,
+            created_at=exchange.created_at,
+            cancelled_at=exchange.cancelled_at,
+            completed_at=exchange.completed_at,
+        )
+
+
+class InviteMapper:
+    """Mapper for Invite model to response schemas."""
+
+    @staticmethod
+    def to_response(invite: Invite) -> InviteResponse:
+        """Build an InviteResponse from an Invite with loaded relationships."""
+        return InviteResponse(
+            id=invite.id,
+            identifier=invite.identifier,
+            godfather_id=invite.godfather_id,
+            godfather_email=invite.godfather.email,
+            status=invite.status.value,
+            used_by_id=invite.used_by_id,
+            used_by_email=invite.used_by.email if invite.used_by else None,
+            created_at=invite.created_at,
+            spent_at=invite.spent_at,
+            revoked_at=invite.revoked_at,
+        )