/
shoppingcart.go
124 lines (105 loc) · 3.66 KB
/
shoppingcart.go
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package endpoints
import (
"bytes"
"encoding/json"
"log"
"net/http"
"strings"
"github.com/EngineerKamesh/igb/igweb/common"
"github.com/EngineerKamesh/igb/igweb/shared/models"
)
func GetShoppingCartItemsEndpoint(env *common.Env) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
var cart *models.ShoppingCart
igwSession, _ := env.Store.Get(r, "igweb-session")
if _, ok := igwSession.Values["shoppingCart"]; ok == true {
// Shopping cart exists in session
decoder := json.NewDecoder(strings.NewReader(string(igwSession.Values["shoppingCart"].([]byte))))
err := decoder.Decode(&cart)
if err != nil {
log.Print("Encountered error when attempting to decode json data from session: ", err)
}
products := env.DB.GetProductsInShoppingCart(cart)
w.Header().Set("Content-Type", "application/json")
json.NewEncoder(w).Encode(products)
} else {
// Shopping cart doesn't exist in session
cart = nil
w.Header().Set("Content-Type", "application/json")
json.NewEncoder(w).Encode(cart)
return
}
})
}
func AddItemToShoppingCartEndpoint(env *common.Env) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
igwSession, _ := env.Store.Get(r, "igweb-session")
decoder := json.NewDecoder(r.Body)
var m map[string]string
err := decoder.Decode(&m)
if err != nil {
log.Print("Encountered error when attempting to decode json data from request body: ", err)
}
defer r.Body.Close()
var cart *models.ShoppingCart
if _, ok := igwSession.Values["shoppingCart"]; ok == true {
// Shopping Cart Exists in Session
decoder := json.NewDecoder(strings.NewReader(string(igwSession.Values["shoppingCart"].([]byte))))
err := decoder.Decode(&cart)
if err != nil {
log.Print("Encountered error when attempting to decode json data from session: ", err)
}
} else {
// Shopping Cart Doesn't Exist in Session, Create a New One
cart = models.NewShoppingCart()
}
cart.AddItem(m["productSKU"])
b := new(bytes.Buffer)
w.Header().Set("Content-Type", "application/json")
err = json.NewEncoder(b).Encode(cart)
if err != nil {
log.Print("Encountered error when attempting to encode cart struct as json data: ", err)
}
igwSession.Values["shoppingCart"] = b.Bytes()
igwSession.Save(r, w)
w.Write([]byte("OK"))
})
}
func RemoveItemFromShoppingCartEndpoint(env *common.Env) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
igwSession, _ := env.Store.Get(r, "igweb-session")
decoder := json.NewDecoder(r.Body)
var m map[string]string
err := decoder.Decode(&m)
if err != nil {
log.Print("Encountered error when attempting to decode json data from request body: ", err)
}
defer r.Body.Close()
var cart *models.ShoppingCart
if _, ok := igwSession.Values["shoppingCart"]; ok == true {
// Shopping Cart Exists in Session
decoder := json.NewDecoder(strings.NewReader(string(igwSession.Values["shoppingCart"].([]byte))))
err := decoder.Decode(&cart)
if err != nil {
log.Print("Encountered error when attempting to decode json data from session: ", err)
}
} else {
// Shopping Cart Doesn't Exist in Session, Create a New One
cart = models.NewShoppingCart()
}
for k, v := range cart.Items {
if v.ProductSKU == m["productSKU"] {
delete(cart.Items, k)
}
}
b := new(bytes.Buffer)
w.Header().Set("Content-Type", "application/json")
err = json.NewEncoder(b).Encode(cart)
if err != nil {
log.Print("Encountered error when attempting to encode cart struct as json data: ", err)
}
igwSession.Values["shoppingCart"] = b.Bytes()
igwSession.Save(r, w)
w.Write([]byte("OK"))
})
}