text: // Copyright (c) 2019 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //      http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  package backupbucket
  
  import (
  	extensionshandler "github.com/gardener/gardener/extensions/pkg/handler"
  	extensionspredicate "github.com/gardener/gardener/extensions/pkg/predicate"
  
  	corev1 "k8s.io/api/core/v1"
  	"sigs.k8s.io/controller-runtime/pkg/controller"
  	"sigs.k8s.io/controller-runtime/pkg/handler"
  	"sigs.k8s.io/controller-runtime/pkg/manager"
  	"sigs.k8s.io/controller-runtime/pkg/predicate"
  	"sigs.k8s.io/controller-runtime/pkg/source"
  
  	extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
  )
  
  const (
  	// FinalizerName is the backupbucket controller finalizer.
  	FinalizerName = "extensions.gardener.cloud/backupbucket"
  	// ControllerName is the name of the controller
  	ControllerName = "backupbucket_controller"
  )
  
  // AddArgs are arguments for adding a BackupBucket controller to a manager.
  type AddArgs struct {
  	// Actuator is a BackupBucket actuator.
  	Actuator Actuator
  	// ControllerOptions are the controller options used for creating a controller.
  	// The options.Reconciler is always overridden with a reconciler created from the
  	// given actuator.
  	ControllerOptions controller.Options
  	// Predicates are the predicates to use.
  	// If unset, GenerationChangedPredicate will be used.
  	Predicates []predicate.Predicate
  	// Type is the type of the resource considered for reconciliation.
  	Type string
  	// IgnoreOperationAnnotation specifies whether to ignore the operation annotation or not.
  	// If the annotation is not ignored, the extension controller will only reconcile
  	// with a present operation annotation typically set during a reconcile (e.g in the maintenance time) by the
  	// gardenlet.
  	IgnoreOperationAnnotation bool
  }
  
  // DefaultPredicates returns the default predicates for a BackupBucket reconciler.
  func DefaultPredicates(ignoreOperationAnnotation bool) []predicate.Predicate {
  	if ignoreOperationAnnotation {
  		return []predicate.Predicate{
  			predicate.GenerationChangedPredicate{},
  		}
  	}
  
  	return []predicate.Predicate{
  		predicate.Or(
  			extensionspredicate.HasOperationAnnotation(),
  			extensionspredicate.LastOperationNotSuccessful(),
  			extensionspredicate.IsDeleting(),
  		),
  	}
  }
  
  // Add creates a new BackupBucket Controller and adds it to the Manager.
  // and Start it when the Manager is Started.
  func Add(mgr manager.Manager, args AddArgs) error {
  	args.ControllerOptions.Reconciler = NewReconciler(mgr, args.Actuator)
  	predicates := extensionspredicate.AddTypePredicate(args.Predicates, args.Type)
  	return add(mgr, args, predicates)
  }
  
  // add adds a new Controller to mgr with r as the reconcile.Reconciler
  func add(mgr manager.Manager, args AddArgs, predicates []predicate.Predicate) error {
  	ctrl, err := controller.New(ControllerName, mgr, args.ControllerOptions)
  	if err != nil {
  		return err
  	}
  
  	if args.IgnoreOperationAnnotation {
  		if err := ctrl.Watch(&source.Kind{Type: &corev1.Secret{}}, &extensionshandler.EnqueueRequestsFromMapFunc{ToRequests: extensionshandler.SimpleMapper(SecretToBackupBucketMapper(predicates), extensionshandler.UpdateWithNew)}); err != nil {
  			return err
  		}
  	}
  
  	return ctrl.Watch(&source.Kind{Type: &extensionsv1alpha1.BackupBucket{}}, &handler.EnqueueRequestForObject{}, predicates...)
  }
  