/
shoppingcart.go
94 lines (69 loc) · 1.51 KB
/
shoppingcart.go
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package models
import (
"encoding/json"
"log"
"strings"
)
type ShoppingCartItem struct {
ProductSKU string `json:"productSKU"`
Quantity int `json:"quantity"`
}
type ShoppingCart struct {
Items map[string]*ShoppingCartItem `json:"items"`
}
func NewShoppingCart() *ShoppingCart {
items := make(map[string]*ShoppingCartItem)
return &ShoppingCart{Items: items}
}
func (s *ShoppingCart) ItemTotal() int {
return len(s.Items)
}
func (s *ShoppingCart) IsEmpty() bool {
if len(s.Items) > 0 {
return false
} else {
return true
}
}
func (s *ShoppingCart) AddItem(sku string) {
if s.Items == nil {
s.Items = make(map[string]*ShoppingCartItem)
}
_, ok := s.Items[sku]
if ok {
s.Items[sku].Quantity += 1
} else {
item := ShoppingCartItem{ProductSKU: sku, Quantity: 1}
s.Items[sku] = &item
}
}
func (s *ShoppingCart) RemoveItem(sku string) bool {
_, ok := s.Items[sku]
if ok {
delete(s.Items, sku)
return true
} else {
return false
}
}
func (s *ShoppingCart) UpdateItemQuantity(sku string, quantity int) bool {
_, ok := s.Items[sku]
if ok {
s.Items[sku].Quantity += 1
return true
} else {
return false
}
}
func SerializeShoppingCart(s *ShoppingCart) []byte {
jsonData, err := json.Marshal(s)
if err != nil {
log.Print("Encountered error when attempting to marshal json: ", err)
}
return jsonData
}
func UnserializeShoppingCart(jsonData []byte) *ShoppingCart {
var s *ShoppingCart = &ShoppingCart{}
json.NewDecoder(strings.NewReader(string(jsonData))).Decode(s)
return s
}