init

api/server.go

@@ -0,0 +1,89 @@
+package api
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"github.com/google/uuid"
+	"github.com/gorilla/mux"
+)
+
+// Item data structure SUB
+type Item struct {
+	ID   uuid.UUID `json:"id"`
+	Name string    `json:"name"`
+}
+
+// Server data structure MAIN
+type Server struct {
+	*mux.Router   // Merge mux router comportement with Server
+	ShoppingItems []Item
+}
+
+// Server Constructor
+func NewServer() *Server {
+	server := &Server{
+		Router:        mux.NewRouter(),
+		ShoppingItems: []Item{},
+	}
+	server.InitRoutes()
+	return server
+}
+
+// Init mux router
+func (server *Server) InitRoutes() {
+	server.HandleFunc("/shopping-items", server.ListShoppingItems()).Methods("GET")
+	server.HandleFunc("/shopping-items", server.CreateShoppingItem()).Methods("POST")
+	server.HandleFunc("/shopping-items/{id}", server.RemoveShoppingItem()).Methods("DELETE")
+}
+
+// Handler create item
+func (server *Server) CreateShoppingItem() http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		var item Item
+		if err := json.NewDecoder(r.Body).Decode(&item); err != nil {
+			http.Error(w, err.Error(), http.StatusBadRequest)
+			return
+		}
+
+		item.ID = uuid.New()
+		server.ShoppingItems = append(server.ShoppingItems, item)
+
+		w.Header().Set("Content-Type", "application/json")
+		if err := json.NewEncoder(w).Encode(item); err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+	}
+}
+
+// Handler retrieve items
+func (server *Server) ListShoppingItems() http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		if err := json.NewEncoder(w).Encode(server.ShoppingItems); err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+	}
+}
+
+// Hndler remove item
+func (server *Server) RemoveShoppingItem() http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		rawID := mux.Vars(r)["id"]
+
+		itemID, err := uuid.Parse(rawID)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusBadRequest)
+			return
+		}
+
+		for i, item := range server.ShoppingItems {
+			if item.ID == itemID {
+				server.ShoppingItems = append(server.ShoppingItems[:i], server.ShoppingItems[i+1:]...)
+				break
+			}
+		}
+	}
+}