regroup backend and frontend in app folder

app/backend/handlers/node_handler.go

@@ -0,0 +1,78 @@
+package handlers
+
+import (
+	"backend/models"
+	"backend/repositories"
+	"encoding/json"
+	"log"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/gorilla/mux"
+)
+
+type NodeHandler struct {
+	Repo *repositories.NodeRepository
+}
+
+var registeredNodes = make(map[string]models.NodeInfo)
+
+func (h *NodeHandler) HandleRegisterNode(c *gin.Context) {
+
+	var node models.NodeInfo
+
+	if err := c.ShouldBindJSON(&node); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	nodeID, err := h.Repo.RegisterNode(node)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{"id": nodeID})
+}
+
+func (h *NodeHandler) HandleRetrieveNodeList(c *gin.Context) {
+
+	log.Println("All nodes retrieved request")
+
+	registeredNodes, err := h.Repo.RetriveNodeList()
+
+	if err != nil {
+		log.Printf("Request error on retrieving all nodes: %v", err)
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Impossible de récupérer la liste des nœuds"})
+		return
+	}
+
+	log.Printf("nb nodes: %v", len(registeredNodes))
+
+	c.JSON(http.StatusOK, registeredNodes)
+}
+
+func HandleRetrieveNode(w http.ResponseWriter, r *http.Request) {
+	if r.Method != "GET" {
+		http.Error(w, "GET requested", http.StatusMethodNotAllowed)
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+
+	params := mux.Vars(r)
+	nodeID := params["id"]
+
+	node, found := registeredNodes[nodeID]
+	if found {
+		json.NewEncoder(w).Encode(node)
+	} else {
+		w.WriteHeader(http.StatusNotFound)
+
+		errorResponse := map[string]string{"error": "Node non trouvé", "id": nodeID}
+		json.NewEncoder(w).Encode(errorResponse)
+	}
+}
+
+func UpdateNodes() {
+}