API extensions: Route listerens (#887)

api/server/route_listeners.go

@@ -0,0 +1,76 @@
+package server
+
+import (
+	"context"
+
+	"github.com/fnproject/fn/api/models"
+	"github.com/fnproject/fn/fnext"
+)
+
+type routeListeners []fnext.RouteListener
+
+var _ fnext.RouteListener = new(routeListeners)
+
+func (s *Server) AddRouteListener(listener fnext.RouteListener) {
+	*s.routeListeners = append(*s.routeListeners, listener)
+}
+
+func (a *routeListeners) BeforeRouteCreate(ctx context.Context, route *models.Route) error {
+	for _, l := range *a {
+		err := l.BeforeRouteCreate(ctx, route)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (a *routeListeners) AfterRouteCreate(ctx context.Context, route *models.Route) error {
+	for _, l := range *a {
+		err := l.BeforeRouteCreate(ctx, route)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (a *routeListeners) BeforeRouteUpdate(ctx context.Context, route *models.Route) error {
+	for _, l := range *a {
+		err := l.BeforeRouteUpdate(ctx, route)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (a *routeListeners) AfterRouteUpdate(ctx context.Context, route *models.Route) error {
+	for _, l := range *a {
+		err := l.AfterRouteUpdate(ctx, route)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (a *routeListeners) BeforeRouteDelete(ctx context.Context, appName string, routePath string) error {
+	for _, l := range *a {
+		err := l.BeforeRouteDelete(ctx, appName, routePath)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (a *routeListeners) AfterRouteDelete(ctx context.Context, appName string, routePath string) error {
+	for _, l := range *a {
+		err := l.AfterRouteDelete(ctx, appName, routePath)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}

api/server/server.go

@@ -111,6 +111,7 @@ type Server struct {
 	certKey         string
 	certAuthority   string
 	appListeners    *appListeners
+	routeListeners  *routeListeners
 	rootMiddlewares []fnext.Middleware
 	apiMiddlewares  []fnext.Middleware
 	promExporter    *prometheus.Exporter
@@ -516,7 +517,9 @@ func New(ctx context.Context, opts ...ServerOption) *Server {
 	s.bindHandlers(ctx)
 
 	s.appListeners = new(appListeners)
-	s.datastore = fnext.NewDatastore(s.datastore, s.appListeners)
+	s.routeListeners = new(routeListeners)
+
+	s.datastore = fnext.NewDatastore(s.datastore, s.appListeners, s.routeListeners)
 
 	return s
 }