feat(edge/update): remote update structure [EE-4040] (#7553)

api/http/middlewares/featureflag.go

@@ -0,0 +1,25 @@
+package middlewares
+
+import (
+	"net/http"
+
+	"github.com/gorilla/mux"
+	httperror "github.com/portainer/libhttp/error"
+	portainer "github.com/portainer/portainer/api"
+	"github.com/portainer/portainer/api/dataservices"
+)
+
+func FeatureFlag(settingsService dataservices.SettingsService, feature portainer.Feature) mux.MiddlewareFunc {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(rw http.ResponseWriter, request *http.Request) {
+			enabled := settingsService.IsFeatureFlagEnabled(feature)
+
+			if !enabled {
+				httperror.WriteError(rw, http.StatusForbidden, "This feature is not enabled", nil)
+				return
+			}
+
+			next.ServeHTTP(rw, request)
+		})
+	}
+}

api/http/middlewares/withitem.go

@@ -0,0 +1,59 @@
+package middlewares
+
+import (
+	"context"
+	"errors"
+	"net/http"
+
+	"github.com/gorilla/mux"
+	httperror "github.com/portainer/libhttp/error"
+	"github.com/portainer/libhttp/request"
+	bolterrors "github.com/portainer/portainer/api/dataservices/errors"
+)
+
+type ItemContextKey string
+
+type ItemGetter[TId ~int, TObject any] func(id TId) (*TObject, error)
+
+func WithItem[TId ~int, TObject any](getter ItemGetter[TId, TObject], idParam string, contextKey ItemContextKey) mux.MiddlewareFunc {
+	if idParam == "" {
+		idParam = "id"
+	}
+
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
+			itemId, err := request.RetrieveNumericRouteVariableValue(req, idParam)
+			if err != nil {
+				httperror.WriteError(rw, http.StatusBadRequest, "Invalid  identifier route variable", err)
+				return
+			}
+
+			item, err := getter(TId(itemId))
+			if err != nil {
+				statusCode := http.StatusInternalServerError
+				if err == bolterrors.ErrObjectNotFound {
+					statusCode = http.StatusNotFound
+				}
+				httperror.WriteError(rw, statusCode, "Unable to find a object with the specified identifier inside the database", err)
+
+				return
+			}
+			ctx := context.WithValue(req.Context(), contextKey, item)
+			next.ServeHTTP(rw, req.WithContext(ctx))
+		})
+	}
+}
+
+func FetchItem[T any](request *http.Request, contextKey string) (*T, error) {
+	contextData := request.Context().Value(contextKey)
+	if contextData == nil {
+		return nil, errors.New("unable to find item in request context")
+	}
+
+	item, ok := contextData.(*T)
+	if !ok {
+		return nil, errors.New("unable to cast context item")
+	}
+
+	return item, nil
+}