Add an ability to uninstall applications

internal/controllers/applications.go

@@ -21,6 +21,7 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 
 	corev1 "k8s.io/api/core/v1"
+	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/rest"
 	ctrl "sigs.k8s.io/controller-runtime"
 )
@@ -185,6 +186,46 @@ func (app *Application) Create(ctx context.Context) error {
 	return nil
 }
 
+func (app *Application) Delete(ctx context.Context) error {
+	log, err := logr.FromContext(ctx)
+	if err != nil {
+		zapLog, err := zap.NewDevelopment()
+		if err != nil {
+			panic(fmt.Sprintf("who watches the watchmen (%v)?", err))
+		}
+		log = zapr.NewLogger(zapLog)
+	}
+
+	app.Controller.GetClient()
+	conf := &rest.Config{
+		Host:        "https://kubernetes.default.svc.cluster.local:443",
+		BearerToken: app.Token,
+		TLSClientConfig: rest.TLSClientConfig{
+			Insecure: true,
+		},
+	}
+
+	clientset, err := kubernetes.NewForConfig(conf)
+	if err != nil {
+		log.Error(err, "Couldn't create a new clientset")
+		return consts.ErrSystemError
+	}
+
+	configmaps, err := clientset.CoreV1().ConfigMaps(app.UserID).List(ctx, metav1.ListOptions{LabelSelector: fmt.Sprintf("uuid=%s", app.Data.UUID)})
+	if err != nil {
+		log.Error(err, "Couldn't list configmaps")
+		return consts.ErrSystemError
+	}
+	for _, cm := range configmaps.Items {
+		if err := clientset.CoreV1().ConfigMaps(app.UserID).Delete(ctx, cm.GetName(), *metav1.NewDeleteOptions(100)); err != nil {
+			log.Error(err, "Couldn't remove configmap", "name", cm.GetName(), "namespace", cm.GetNamespace())
+			return consts.ErrSystemError
+		}
+	}
+
+	return nil
+}
+
 // func (env *Environemnt) Update(ctx context.Context) error {
 // 	if err := env.isNsVerified(ctx); err != nil {
 // 		log.Println("Can't verify ns")
@@ -253,7 +294,7 @@ func (app *Application) Create(ctx context.Context) error {
 
 // 	return nil
 // }
-// func (env *Environemnt) Delete(ctx context.Context) error {
+// func (*Environemnt) Delete(ctx context.Context) error {
 // 	env.Controller.GetClient()
 // 	conf := &rest.Config{
 // 		Host:        "https://kubernetes.default.svc.cluster.local:443",