services/orders/usecase/business/orderSorter.go
package business
import (
"sort"
"strings"
"go.kicksware.com/api/services/orders/core/model"
)
type OrderSorter struct {
items []*model.Order
property string
}
func NewSorter(items []*model.Order, property string) (s *OrderSorter) {
s = &OrderSorter{}
s.items = items
s.property = property
return s
}
func (s *OrderSorter) Len() int { return len(s.items) }
func (s *OrderSorter) Swap(i, j int) { s.items[i], s.items[j] = s.items[j], s.items[i] }
func (s *OrderSorter) Less(i, j int) bool {
switch strings.ToLower(s.property) {
case "price":
return s.items[i].Price < s.items[j].Price
case "released":
return s.items[i].OrderedAt.Sub(s.items[j].OrderedAt).Hours() < 0
default:
return s.items[i].UniqueID < s.items[j].UniqueID
}
}
func (s *OrderSorter) Asc() []*model.Order {
sort.Sort(s)
return s.items
}
func (s *OrderSorter) Desc() []*model.Order {
sort.Sort(sort.Reverse(s))
return s.items
}
func (s *OrderSorter) Sort(desc bool) []*model.Order {
if desc {
return s.Desc()
}
return s.Asc();
}