Add external product prices (#47)

Co-authored-by: Niklas Fondberg <niklas.fondberg@photowall.se>

api/lib/prices.py

@@ -4,6 +4,7 @@
 from api.lib.utils import round_half_up
 from api.lib.limits import calculate_canvas_limits
 from api.lib import pwinty
+from api.models.external_print_product import get_external_print_product
 
 
 def wallpaper_m2_price(
@@ -297,6 +298,45 @@ def _price_for_poster_hanger_size(size):
     raise ValueError("Invalid poster hanger size: {}".format(size))
 
 
+def _designer_pricepremium(designer, group_id):
+    if group_id in [1,3,6]:
+        return designer.pricepremium_wallpaper
+    if group_id == 2:
+        return designer.pricepremium_canvas
+    if group_id == 7:
+        return designer.pricepremium_poster
+    if group_id == 8:
+        return designer.pricepremium_framed_print
+
+    raise ValueError("Unexpected group id: {}".format(group_id))
+
+
+def external_product_price(
+    id, market, designer=None, inquiry=None, rounded=True, inc_vat=True
+):
+    external_product = get_external_print_product(id)
+    price = external_product["price"]
+
+    price *= market.price_adjustments
+
+    if designer:
+        designer_pricepremium = _designer_pricepremium(designer, external_product["group_id"])
+        price *= (float(designer_pricepremium) / 100) + 1
+
+    if inquiry:
+        price *= (float(inquiry.pricepremium) / 100) + 1
+
+    price *= market.exchange_rate
+
+    if inc_vat:
+        price *= market.vat
+
+    if rounded:
+        price = round_half_up(price)
+
+    return price
+
+
 def framed_print_price(
     sku, market, designer=None, reseller=None, inquiry=None, rounded=True, inc_vat=True
 ):
@@ -445,8 +485,18 @@ def inquiry_price(
     hanger = kwargs.get("hanger", inquiry.hanger)
     sku = kwargs.get("sku")
     reseller = kwargs.get("reseller", inquiry.dealer_store)
+    external_id = kwargs.get("external_id")
 
-    if inquiry.product_group == "photo-wallpaper":
+    if external_id:
+        price = external_product_price(
+            id=external_id,
+            market=inquiry.market,
+            designer=inquiry.designer,
+            inquiry=inquiry,
+            rounded=False,
+            inc_vat=False,
+        )
+    elif inquiry.product_group == "photo-wallpaper":
         price = wallpaper_price(
             width,
             height,