Add an endpoint to submit an order to printful

1 files changed, 38 insertions, 0 deletions

diff --git a/thallium-backend/src/routes/orders.py b/thallium-backend/src/routes/orders.py
new file mode 100644
index 0000000..c5126a8
--- /dev/null
+++ b/thallium-backend/src/routes/orders.py
@@ -0,0 +1,38 @@
+import logging
+
+from fastapi import APIRouter, Depends, HTTPException, Request
+from sqlalchemy import select
+
+from src.auth import TokenAuth
+from src.dto import Order, OrderCreate, Voucher
+from src.orm import Voucher as DBVoucher
+from src.settings import DBSession, PrintfulClient
+
+router = APIRouter(prefix="/orders", tags=["Orders"], dependencies=[Depends(TokenAuth(allow_vouchers=True))])
+
+log = logging.getLogger(__name__)
+
+
[email protected]("/")
+async def create_order(request: Request, db: DBSession, client: PrintfulClient, order: OrderCreate) -> Order | None:
+    """
+    Create the order in printful and deduct the order cost from the voucher.
+
+    If the voucher does not have enough funds, the order is cancelled.
+    """
+    resp = await client.post("/orders", json=order.as_printful_payload(), params={"confirm": False})
+    resp.raise_for_status()
+    submitted_order = Order.model_validate(resp.json()["result"])
+
+    voucher: Voucher = request.state.voucher
+    stmt = select(DBVoucher).where(DBVoucher.id == voucher.id).with_for_update()
+    db_voucher = await db.scalar(stmt)
+    if submitted_order.costs.total > db_voucher.balance:
+        await client.delete(f"/orders/{submitted_order.id}")
+        raise HTTPException(
+            status_code=400,
+            detail=f"Order totals {submitted_order.costs.total}, only {db_voucher.balance} remaining on voucher.",
+        )
+
+    db_voucher.balance = db_voucher.balance - submitted_order.costs.total
+    return submitted_order