shopping balancer finished

service/planner/service/shopping.go

@@ -70,15 +70,78 @@ func GetShoppingList(id int) ([]*model.ShoppingLists, error) {
 					}
 				}
 			}
-			meal, err := GetMeal(v.MealID)
-			if err != nil {
-				return nil, err
+			if lowestDuration != 255*time.Hour*24*365 {
+				meal, err := GetMeal(v.MealID)
+				if err != nil {
+					return nil, err
+				}
+
+				key := dates[currentIdx].Format(time.DateOnly)
+				userList.Lists[key] = append(userList.Lists[key], meal.Ingredients...)
 			}
-			key := dates[currentIdx].Format(time.DateOnly)
-			userList.Lists[key] = append(userList.Lists[key], meal.Ingredients...)
 		}
 	}
-
 	result = append(result, &userList)
+	for _, groupId := range user.GroupIds {
+		group, err := GetGroup(groupId)
+		if err != nil {
+			continue
+		}
+		var groupList model.ShoppingLists
+		groupList.Name = group.Name
+		groupList.Lists = make(map[string][]*model.Ingredient)
+		groupDates := make(map[int][]time.Time)
+		for _, userId := range group.UserIDs {
+			groupUser, err := GetUser(userId)
+			if err != nil {
+				continue
+			}
+			for _, v := range groupUser.ShoppingDates {
+				date, err := time.Parse(time.RFC3339, v.Date)
+				if err != nil {
+					return nil, err
+				}
+				timeNow := time.Now().Truncate(24 * time.Hour)
+				log.Infof("Compare time (%s, %s)", timeNow.Format(time.DateOnly), date.Format(time.DateOnly))
+				if timeNow.Equal(date) || timeNow.Before(date) {
+					groupDates[userId] = append(groupDates[userId], date)
+				}
+			}
+		}
+
+		if len(group.Meals) != 0 {
+			for _, v := range group.Meals {
+				date, err := time.Parse(time.RFC3339, v.Date)
+				if err != nil {
+					return nil, err
+				}
+				currentUserId := 0
+				currentIdx := 0
+				lowestDuration := 255 * time.Hour * 24 * 365
+				for id, dates := range groupDates {
+					for idx, d := range dates {
+						if date.Equal(d) || date.After(d) {
+							if date.Sub(d) < lowestDuration {
+								currentUserId = id
+								currentIdx = idx
+								lowestDuration = date.Sub(d)
+							}
+						}
+					}
+				}
+				if lowestDuration != 255*time.Hour*24*365 {
+					if currentUserId == id {
+						meal, err := GetMeal(v.MealID)
+						if err != nil {
+							return nil, err
+						}
+						key := groupDates[currentUserId][currentIdx].Format(time.DateOnly)
+						groupList.Lists[key] = append(groupList.Lists[key], meal.Ingredients...)
+					}
+				}
+			}
+		}
+		result = append(result, &groupList)
+	}
 	return result, nil
 }