feat: support app.k8s.io applications paging query

Signed-off-by: Nhongming <talonwan@yunify.com>

cmd/ks-apiserver/app/server.go

@@ -291,6 +291,26 @@ func WaitForResourceSync(stopCh <-chan struct{}) error {
 	ksInformerFactory.Start(stopCh)
 	ksInformerFactory.WaitForCacheSync(stopCh)
 
+	appInformerFactory := informers.AppSharedInformerFactory()
+
+	appGVRs := []schema.GroupVersionResource{
+		{Group: "app.k8s.io", Version: "v1beta1", Resource: "applications"},
+	}
+
+	for _, gvr := range appGVRs {
+		if !isResourceExists(gvr) {
+			klog.Warningf("resource %s not exists in the cluster", gvr)
+		} else {
+			_, err := appInformerFactory.ForResource(gvr)
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	appInformerFactory.Start(stopCh)
+	appInformerFactory.WaitForCacheSync(stopCh)
+
 	klog.V(0).Info("Finished caching objects")
 
 	return nil

pkg/informers/informers.go

@@ -18,6 +18,7 @@
 package informers
 
 import (
+	applicationinformers "github.com/kubernetes-sigs/application/pkg/client/informers/externalversions"
 	s2iinformers "github.com/kubesphere/s2ioperator/pkg/client/informers/externalversions"
 	k8sinformers "k8s.io/client-go/informers"
 	ksinformers "kubesphere.io/kubesphere/pkg/client/informers/externalversions"
@@ -32,9 +33,11 @@ var (
 	k8sOnce            sync.Once
 	s2iOnce            sync.Once
 	ksOnce             sync.Once
+	appOnce            sync.Once
 	informerFactory    k8sinformers.SharedInformerFactory
 	s2iInformerFactory s2iinformers.SharedInformerFactory
 	ksInformerFactory  ksinformers.SharedInformerFactory
+	appInformerFactory applicationinformers.SharedInformerFactory
 )
 
 func SharedInformerFactory() k8sinformers.SharedInformerFactory {
@@ -60,3 +63,11 @@ func KsSharedInformerFactory() ksinformers.SharedInformerFactory {
 	})
 	return ksInformerFactory
 }
+
+func AppSharedInformerFactory() applicationinformers.SharedInformerFactory {
+	appOnce.Do(func() {
+		appClient := client.ClientSets().K8s().Application()
+		appInformerFactory = applicationinformers.NewSharedInformerFactory(appClient, defaultResync)
+	})
+	return appInformerFactory
+}

pkg/models/resources/appplications.go

+/*
+ *
+ * Copyright 2019 The KubeSphere Authors.
+ *
+ * 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 resources
+
+import (
+	"github.com/kubernetes-sigs/application/pkg/apis/app/v1beta1"
+	"k8s.io/apimachinery/pkg/labels"
+	"kubesphere.io/kubesphere/pkg/constants"
+	"kubesphere.io/kubesphere/pkg/informers"
+	"kubesphere.io/kubesphere/pkg/server/params"
+	"kubesphere.io/kubesphere/pkg/utils/sliceutil"
+	"sort"
+	"strings"
+)
+
+type appSearcher struct {
+}
+
+func (*appSearcher) get(namespace, name string) (interface{}, error) {
+	return informers.AppSharedInformerFactory().App().V1beta1().Applications().Lister().Applications(namespace).Get(name)
+}
+
+// exactly Match
+func (*appSearcher) match(match map[string]string, item *v1beta1.Application) bool {
+	for k, v := range match {
+		switch k {
+		case Name:
+			names := strings.Split(v, "|")
+			if !sliceutil.HasString(names, item.Name) {
+				return false
+			}
+		case Keyword:
+			if !strings.Contains(item.Name, v) && !searchFuzzy(item.Labels, "", v) && !searchFuzzy(item.Annotations, "", v) {
+				return false
+			}
+		default:
+			// label not exist or value not equal
+			if val, ok := item.Labels[k]; !ok || val != v {
+				return false
+			}
+		}
+	}
+	return true
+}
+
+// Fuzzy searchInNamespace
+func (*appSearcher) fuzzy(fuzzy map[string]string, item *v1beta1.Application) bool {
+	for k, v := range fuzzy {
+		switch k {
+		case Name:
+			if !strings.Contains(item.Name, v) && !strings.Contains(item.Annotations[constants.DisplayNameAnnotationKey], v) {
+				return false
+			}
+		case Label:
+			if !searchFuzzy(item.Labels, "", v) {
+				return false
+			}
+		case annotation:
+			if !searchFuzzy(item.Annotations, "", v) {
+				return false
+			}
+			return false
+		case app:
+			if !strings.Contains(item.Labels[chart], v) && !strings.Contains(item.Labels[release], v) {
+				return false
+			}
+		default:
+			if !searchFuzzy(item.Labels, k, v) {
+				return false
+			}
+		}
+	}
+	return true
+}
+
+func (*appSearcher) compare(a, b *v1beta1.Application, orderBy string) bool {
+	switch orderBy {
+	case CreateTime:
+		return a.CreationTimestamp.Time.Before(b.CreationTimestamp.Time)
+	case Name:
+		fallthrough
+	default:
+		return strings.Compare(a.Name, b.Name) <= 0
+	}
+}
+
+func (s *appSearcher) search(namespace string, conditions *params.Conditions, orderBy string, reverse bool) ([]interface{}, error) {
+	apps, err := informers.AppSharedInformerFactory().App().V1beta1().Applications().Lister().Applications(namespace).List(labels.Everything())
+
+	if err != nil {
+		return nil, err
+	}
+
+	result := make([]*v1beta1.Application, 0)
+
+	if len(conditions.Match) == 0 && len(conditions.Fuzzy) == 0 {
+		result = apps
+	} else {
+		for _, item := range apps {
+			if s.match(conditions.Match, item) && s.fuzzy(conditions.Fuzzy, item) {
+				result = append(result, item)
+			}
+		}
+	}
+	sort.Slice(result, func(i, j int) bool {
+		if reverse {
+			tmp := i
+			i = j
+			j = tmp
+		}
+		return s.compare(result[i], result[j], orderBy)
+	})
+
+	r := make([]interface{}, 0)
+	for _, i := range result {
+		r = append(r, i)
+	}
+	return r, nil
+}

pkg/models/resources/resources.go

@@ -42,6 +42,7 @@ func init() {
 	resources[S2iBuilders] = &s2iBuilderSearcher{}
 	resources[S2iRuns] = &s2iRunSearcher{}
 	resources[HorizontalPodAutoscalers] = &hpaSearcher{}
+	resources[Applications] = &appSearcher{}
 
 	resources[Nodes] = &nodeSearcher{}
 	resources[Namespaces] = &namespaceSearcher{}
@@ -103,6 +104,7 @@ const (
 	Services                 = "services"
 	StatefulSets             = "statefulsets"
 	HorizontalPodAutoscalers = "horizontalpodautoscalers"
+	Applications             = "applications"
 	Nodes                    = "nodes"
 	Namespaces               = "namespaces"
 	StorageClasses           = "storageclasses"

pkg/simple/client/k8s/kubernetes.go

 package k8s
 
 import (
+	applicationclientset "github.com/kubernetes-sigs/application/pkg/client/clientset/versioned"
 	s2i "github.com/kubesphere/s2ioperator/pkg/client/clientset/versioned"
 	"k8s.io/client-go/discovery"
 	"k8s.io/client-go/kubernetes"
@@ -22,6 +23,8 @@ type KubernetesClient struct {
 
 	s2i *s2i.Clientset
 
+	application *applicationclientset.Clientset
+
 	master string
 
 	config *rest.Config
@@ -42,6 +45,7 @@ func NewKubernetesClientOrDie(options *KubernetesOptions) *KubernetesClient {
 		discoveryClient: discovery.NewDiscoveryClientForConfigOrDie(config),
 		ks:              kubesphere.NewForConfigOrDie(config),
 		s2i:             s2i.NewForConfigOrDie(config),
+		application:     applicationclientset.NewForConfigOrDie(config),
 		master:          config.Host,
 		config:          config,
 	}
@@ -84,6 +88,11 @@ func NewKubernetesClient(options *KubernetesOptions) (*KubernetesClient, error)
 		return nil, err
 	}
 
+	k.application, err = applicationclientset.NewForConfig(config)
+	if err != nil {
+		return nil, err
+	}
+
 	k.master = options.Master
 	k.config = config
 
@@ -106,6 +115,10 @@ func (k *KubernetesClient) S2i() s2i.Interface {
 	return k.s2i
 }
 
+func (k *KubernetesClient) Application() applicationclientset.Interface {
+	return k.application
+}
+
 // master address used to generate kubeconfig for downloading
 func (k *KubernetesClient) Master() string {
 	return k.master