Add external product prices (#47)

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

api/models/external_print_product.py

@@ -0,0 +1,46 @@
+# coding=UTF-8
+
+from api.extensions import db
+from api.lib.utils import lru_with_ttl
+
+@lru_with_ttl(ttl_seconds=300)
+def get_all_external_print_products():
+    sql="select external_product_id, price_sek, group_id from external_print_products"
+    result = db.session.execute(sql)
+    rows = result.fetchall()
+
+    prices = {}
+    for row in rows:
+        external_id = row[0]
+        price = float(row[1])
+        group_id = row[2]
+        prices[external_id] = {"price": price, "group_id": group_id}
+
+    return prices
+
+
+def get_external_print_product(id):
+    all = get_all_external_print_products()
+
+    if id not in all:
+        raise ValueError("Invalid external product id: {}".format(id))
+
+    external_product = all.get(id)
+
+    return external_product
+
+
+def get_cheapest_canvas_product():
+    sql = "select external_product_id from external_print_products where group_id = 2 order by price_sek limit 1"
+    result = db.session.execute(sql)
+    external_id = result.first()[0]
+
+    return external_id
+
+
+def get_cheapest_poster_product():
+    sql = "select external_product_id from external_print_products where group_id in (7,8) order by price_sek limit 1"
+    result = db.session.execute(sql)
+    external_id = result.first()[0]
+
+    return external_id