kubevela/pkg/velaql/providers/query/handler.go

/*
 Copyright 2021. The KubeVela 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 query

import (
	stdctx "context"

	corev1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
	"k8s.io/apimachinery/pkg/runtime/schema"
	"sigs.k8s.io/controller-runtime/pkg/client"

	"github.com/oam-dev/kubevela/pkg/cue/model/value"
	"github.com/oam-dev/kubevela/pkg/multicluster"
	wfContext "github.com/oam-dev/kubevela/pkg/workflow/context"
	"github.com/oam-dev/kubevela/pkg/workflow/providers"
	"github.com/oam-dev/kubevela/pkg/workflow/types"
)

const (
	// ProviderName is provider name for install.
	ProviderName = "query"
	// HelmReleaseKind is the kind of HelmRelease
	HelmReleaseKind = "HelmRelease"
)

var fluxcdGroupVersion = schema.GroupVersion{Group: "helm.toolkit.fluxcd.io", Version: "v2beta1"}

type provider struct {
	cli client.Client
}

// AppResources represent resources created by app
type AppResources struct {
	Revision       int64             `json:"revision"`
	PublishVersion string            `json:"publishVersion"`
	DeployVersion  string            `json:"deployVersion"`
	Metadata       metav1.ObjectMeta `json:"metadata"`
	Components     []Component       `json:"components"`
}

// Component group resources rendered by ApplicationComponent
type Component struct {
	Name      string     `json:"name"`
	Resources []Resource `json:"resources"`
}

// Resource refer to an object with cluster info
type Resource struct {
	Cluster string                     `json:"cluster"`
	Object  *unstructured.Unstructured `json:"object"`
}

// Option is the query option
type Option struct {
	Name               string        `json:"name"`
	Namespace          string        `json:"namespace"`
	Components         []string      `json:"components,omitempty"`
	Filter             ClusterFilter `json:"filter,omitempty"`
	EnableHistoryQuery bool          `json:"enableHistoryQuery,omitempty"`
}

// ClusterFilter filter resource created by component
type ClusterFilter struct {
	Cluster          string `json:"cluster,omitempty"`
	ClusterNamespace string `json:"clusterNamespace,omitempty"`
}

// ListResourcesInApp lists CRs created by Application
func (h *provider) ListResourcesInApp(ctx wfContext.Context, v *value.Value, act types.Action) error {
	val, err := v.LookupValue("app")
	if err != nil {
		return err
	}
	opt := Option{}
	if err = val.UnmarshalTo(&opt); err != nil {
		return err
	}
	collector := NewAppCollector(h.cli, opt)
	appResList, err := collector.CollectResourceFromApp()
	if err != nil {
		return v.FillObject(err.Error(), "err")
	}
	return v.FillObject(appResList, "list")
}

func (h *provider) CollectPods(ctx wfContext.Context, v *value.Value, act types.Action) error {
	val, err := v.LookupValue("value")
	if err != nil {
		return err
	}
	cluster, err := v.GetString("cluster")
	if err != nil {
		return err
	}
	obj := new(unstructured.Unstructured)
	if err = val.UnmarshalTo(obj); err != nil {
		return err
	}

	var pods []*unstructured.Unstructured
	var collector PodCollector

	switch obj.GroupVersionKind() {
	case fluxcdGroupVersion.WithKind(HelmReleaseKind):
		collector = helmReleasePodCollector
	default:
		collector = NewPodCollector(obj.GroupVersionKind())
	}

	pods, err = collector(h.cli, obj, cluster)
	if err != nil {
		return v.FillObject(err.Error(), "err")
	}
	return v.FillObject(pods, "list")
}

func (h *provider) SearchEvents(ctx wfContext.Context, v *value.Value, act types.Action) error {
	val, err := v.LookupValue("value")
	if err != nil {
		return err
	}
	cluster, err := v.GetString("cluster")
	if err != nil {
		return err
	}
	obj := new(unstructured.Unstructured)
	if err = val.UnmarshalTo(obj); err != nil {
		return err
	}

	listCtx := multicluster.ContextWithClusterName(stdctx.Background(), cluster)
	fieldSelector := getEventFieldSelector(obj)
	eventList := corev1.EventList{}
	listOpts := []client.ListOption{
		client.InNamespace(obj.GetNamespace()),
		client.MatchingFieldsSelector{
			Selector: fieldSelector,
		},
	}
	if err := h.cli.List(listCtx, &eventList, listOpts...); err != nil {
		return v.FillObject(err.Error(), "err")
	}
	return v.FillObject(eventList.Items, "list")
}

// Install register handlers to provider discover.
func Install(p providers.Providers, cli client.Client) {
	prd := &provider{
		cli: cli,
	}

	p.Register(ProviderName, map[string]providers.Handler{
		"listResourcesInApp": prd.ListResourcesInApp,
		"collectPods":        prd.CollectPods,
		"searchEvents":       prd.SearchEvents,
	})
}