Return empty arrays rather than null

pkg/restaurants/fresh.go

@@ -17,6 +17,7 @@ type FreshRestaurant struct {
 
 func MakeFreshRestaurant(url string, name string) FreshRestaurant {
 	restaurant := FreshRestaurant{}
+	restaurant.SetDefaultValues()
 	restaurant.url = url
 	restaurant.name = name
 	return restaurant
@@ -24,6 +25,7 @@ func MakeFreshRestaurant(url string, name string) FreshRestaurant {
 
 func NewFreshRestaurant(url string, name string) *FreshRestaurant {
 	restaurant := new(FreshRestaurant)
+	restaurant.SetDefaultValues()
 	restaurant.url = url
 	restaurant.name = name
 	return restaurant

pkg/restaurants/menicka.go

@@ -16,6 +16,7 @@ type MenickaRestaurant struct {
 
 func MakeMenickaRestaurant(url string, name string) MenickaRestaurant {
 	restaurant := MenickaRestaurant{}
+	restaurant.SetDefaultValues()
 	restaurant.url = url
 	restaurant.name = name
 	return restaurant
@@ -23,6 +24,7 @@ func MakeMenickaRestaurant(url string, name string) MenickaRestaurant {
 
 func NewMenickaRestaurant(url string, name string) *MenickaRestaurant {
 	restaurant := new(MenickaRestaurant)
+	restaurant.SetDefaultValues()
 	restaurant.url = url
 	restaurant.name = name
 	return restaurant

pkg/restaurants/menu.go

@@ -8,6 +8,10 @@ type Menu struct {
 	day   string
 }
 
+func MakeMenuDefault() Menu {
+	return Menu{make([]Meal, 0), true, ""}
+}
+
 func MakeMenu(meals []Meal, day string) Menu {
 	return Menu{meals, true, day}
 }

pkg/restaurants/restaurant.go

@@ -28,6 +28,13 @@ type RestaurantJSON struct {
 	PermanentMeals []Meal `json:"permanentmeals"`
 }
 
+func (restaurant *Restaurant) SetDefaultValues() {
+	restaurant.url = ""
+	restaurant.name = ""
+	restaurant.menus = [7]Menu{}
+	restaurant.permanent = []Meal{}
+}
+
 func (restaurant *Restaurant) AddPermanent(isSoup bool, name string, desc string, price int) {
 	restaurant.AddPermanentMeal(MakeMeal(isSoup, name, desc, price))
 }
@@ -42,7 +49,7 @@ func (restaurant Restaurant) GetMenus() [7]Menu {
 
 func (restaurant *Restaurant) clearMenus() {
 	for i := 0; i < 7; i++ {
-		restaurant.menus[i] = Menu{}
+		restaurant.menus[i] = MakeMenuDefault()
 	}
 }