Add hook to re/unload UI assets

ui/module.go

@@ -1,13 +1,51 @@
 package ui
 
 import (
+	"context"
+
+	resources "github.com/cookieo9/resources-go"
+	"github.com/safing/portbase/log"
 	"github.com/safing/portbase/modules"
 )
 
+const (
+	eventReload = "reload"
+)
+
+var (
+	module *modules.Module
+)
+
 func init() {
-	modules.Register("ui", prep, nil, nil, "api", "updates")
+	module = modules.Register("ui", prep, start, nil, "api", "updates")
 }
 
 func prep() error {
+	module.RegisterEvent(eventReload)
+
 	return registerRoutes()
 }
+
+func start() error {
+	return module.RegisterEventHook("ui", eventReload, "reload assets", reloadUI)
+}
+
+func reloadUI(ctx context.Context, _ interface{}) error {
+	log.Info("core: user/UI requested UI reload")
+
+	appsLock.Lock()
+	defer appsLock.Unlock()
+
+	// close all bundles
+	for id, bundle := range apps {
+		err := bundle.Close()
+		if err != nil {
+			log.Warningf("ui: failed to close bundle %s: %s", id, err)
+		}
+	}
+
+	// reset index
+	apps = make(map[string]*resources.BundleSequence)
+
+	return nil
+}