added store

store.go

@@ -0,0 +1,65 @@
+package main
+
+import (
+	"errors"
+)
+
+type store struct {
+	cakes  []cake
+	orders []order
+}
+
+func NewStore() *store {
+	var out store
+	out.cakes = make([]cake, 0)
+	out.orders = make([]order, 0)
+	return &out
+}
+
+func (s *store) getCakes() []cake {
+	return s.cakes
+}
+
+func (s *store) saveCake(newCake cake) int {
+	if newCake.ID == -1 {
+		newCake.ID = len(s.cakes)
+		s.cakes = append(s.cakes, newCake)
+		return newCake.ID
+	}
+	for i := range s.cakes {
+		if s.cakes[i].ID == newCake.ID {
+			s.cakes[i] = newCake
+			break
+		}
+	}
+	return newCake.ID
+}
+
+func (s *store) getOrder(id int) (order, error) {
+	for _, e := range s.orders {
+		if e.ID == id {
+			return e, nil
+		}
+	}
+	return order{}, errors.New("order not found")
+}
+
+func (s *store) getOrders() []order {
+	return s.orders
+}
+
+func (s *store) saveOrder(newOrder order) int {
+	if newOrder.ID == -1 {
+		newOrder.ID = len(s.orders)
+		s.orders = append(s.orders, newOrder)
+		return newOrder.ID
+	}
+
+	for i := range s.orders {
+		if s.orders[i].ID == newOrder.ID {
+			s.orders[i] = newOrder
+			break
+		}
+	}
+	return newOrder.ID
+}