add support slack in webhook

Signed-off-by: peimingming <peimingming@corp.netease.com>

src/pkg/notification/notification.go

@@ -45,7 +45,7 @@ func Init() {
 		model.EventTypeScanningCompleted, model.EventTypeScanningFailed, model.EventTypeProjectQuota,
 	)
 
-	initSupportedNotifyType(model.NotifyTypeHTTP)
+	initSupportedNotifyType(model.NotifyTypeHTTP, model.NotifyTypeSlack)
 
 	log.Info("notification initialization completed")
 }

src/pkg/notifier/handler/notification/slack_handler.go

@@ -0,0 +1,129 @@
+package notification
+
+import (
+	"errors"
+	"fmt"
+
+	"bytes"
+	"encoding/json"
+	"github.com/goharbor/harbor/src/common/job/models"
+	"github.com/goharbor/harbor/src/jobservice/job"
+	"github.com/goharbor/harbor/src/pkg/notification"
+	"github.com/goharbor/harbor/src/pkg/notifier/model"
+	"strings"
+	"text/template"
+)
+
+const (
+	// SlackBodyTemplate defines Slack request body template
+	SlackBodyTemplate = `{
+	"blocks": [
+		{
+            "type": "section",
+			"text": {
+				"type": "mrkdwn",
+				"text": "*Harbor webhook events*"
+			}
+        },
+        {
+            "type": "section",
+			"text": {
+				"type": "mrkdwn",
+				"text": "*event_type:* {{.Type}}"
+			}
+        },
+        {
+            "type": "section",
+			"text": {
+				"type": "mrkdwn",
+				"text": "*occur_at:* <!date^{{.OccurAt}}^{date} at {time}|February 18th, 2014 at 6:39 AM PST>"
+			}
+        },
+        {	"type": "section",
+			"text": {
+				"type": "mrkdwn",
+				"text": "*operator:* {{.Operator}}"
+			}
+		},
+        {	"type": "section",
+			"text": {
+				"type": "mrkdwn",
+				"text": "*event_data:*"
+			}
+		},
+		{	"type": "section",
+			"text": {
+				"type": "mrkdwn",
+				"text": "{{.EventData}}"
+			}
+		}
+    ]}`
+)
+
+// SlackHandler preprocess event data to slack and start the hook processing
+type SlackHandler struct {
+}
+
+// Handle handles event to slack
+func (s *SlackHandler) Handle(value interface{}) error {
+	if value == nil {
+		return errors.New("SlackHandler cannot handle nil value")
+	}
+
+	event, ok := value.(*model.HookEvent)
+	if !ok || event == nil {
+		return errors.New("invalid notification slack event")
+	}
+
+	return s.process(event)
+}
+
+// IsStateful ...
+func (s *SlackHandler) IsStateful() bool {
+	return false
+}
+
+func (s *SlackHandler) process(event *model.HookEvent) error {
+	j := &models.JobData{
+		Metadata: &models.JobMetadata{
+			JobKind: job.KindGeneric,
+		},
+	}
+	// Create a webhookJob to send message to slack
+	j.Name = job.WebhookJob
+
+	// Convert payload to slack format
+	payload, err := s.convert(event.Payload)
+	if err != nil {
+		return fmt.Errorf("convert payload to slack body failed: %v", err)
+	}
+
+	j.Parameters = map[string]interface{}{
+		"payload": payload,
+		"address": event.Target.Address,
+		// Users can define a auth header in http statement in notification(webhook) policy.
+		// So it will be sent in header in http request.
+		"auth_header":      event.Target.AuthHeader,
+		"skip_cert_verify": event.Target.SkipCertVerify,
+	}
+	return notification.HookManager.StartHook(event, j)
+}
+
+func (s *SlackHandler) convert(payLoad *model.Payload) (string, error) {
+	data := make(map[string]interface{})
+	data["Type"] = payLoad.Type
+	data["OccurAt"] = payLoad.OccurAt
+	data["Operator"] = payLoad.Operator
+	eventData, err := json.MarshalIndent(payLoad.EventData, "", "\t")
+	if err != nil {
+		return "", fmt.Errorf("marshal from eventData %v failed: %v", payLoad.EventData, err)
+	}
+	data["EventData"] = "```" + strings.Replace(string(eventData), `"`, `\"`, -1) + "```"
+
+	st, _ := template.New("slack").Parse(SlackBodyTemplate)
+	var slackBuf bytes.Buffer
+	if err := st.Execute(&slackBuf, data); err != nil {
+		return "", fmt.Errorf("%v", err)
+	}
+	return slackBuf.String(), nil
+}

src/pkg/notifier/handler/notification/slack_handler_test.go

@@ -0,0 +1,101 @@
+package notification
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+
+	cModels "github.com/goharbor/harbor/src/common/models"
+	"github.com/goharbor/harbor/src/pkg/notification"
+	"github.com/goharbor/harbor/src/pkg/notifier/event"
+	"github.com/goharbor/harbor/src/pkg/notifier/model"
+	"github.com/stretchr/testify/require"
+)
+
+func TestSlackHandler_Handle(t *testing.T) {
+	hookMgr := notification.HookManager
+	defer func() {
+		notification.HookManager = hookMgr
+	}()
+	notification.HookManager = &fakedHookManager{}
+
+	handler := &SlackHandler{}
+
+	type args struct {
+		event *event.Event
+	}
+	tests := []struct {
+		name    string
+		args    args
+		wantErr bool
+	}{
+		{
+			name: "SlackHandler_Handle Want Error 1",
+			args: args{
+				event: &event.Event{
+					Topic: "slack",
+					Data:  nil,
+				},
+			},
+			wantErr: true,
+		},
+		{
+			name: "SlackHandler_Handle Want Error 2",
+			args: args{
+				event: &event.Event{
+					Topic: "slack",
+					Data:  &model.ImageEvent{},
+				},
+			},
+			wantErr: true,
+		},
+		{
+			name: "SlackHandler_Handle 1",
+			args: args{
+				event: &event.Event{
+					Topic: "slack",
+					Data: &model.HookEvent{
+						PolicyID:  1,
+						EventType: "pushImage",
+						Target: &cModels.EventTarget{
+							Type:    "slack",
+							Address: "http://127.0.0.1:8080",
+						},
+						Payload: &model.Payload{
+							OccurAt:  time.Now().Unix(),
+							Type:     "pushImage",
+							Operator: "admin",
+							EventData: &model.EventData{
+								Resources: []*model.Resource{
+									{
+										Tag: "v9.0",
+									},
+								},
+								Repository: &model.Repository{
+									Name: "library/debian",
+								},
+							},
+						},
+					},
+				},
+			},
+			wantErr: false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			err := handler.Handle(tt.args.event.Data)
+			if tt.wantErr {
+				require.NotNil(t, err, "Error: %s", err)
+				return
+			}
+		})
+	}
+}
+
+func TestSlackHandler_IsStateful(t *testing.T) {
+	handler := &SlackHandler{}
+	assert.False(t, handler.IsStateful())
+}

src/pkg/notifier/model/const.go

@@ -13,5 +13,6 @@ const (
 	EventTypeTestEndpoint      = "testEndpoint"
 	EventTypeProjectQuota      = "projectQuota"
 
-	NotifyTypeHTTP = "http"
+	NotifyTypeHTTP  = "http"
+	NotifyTypeSlack = "slack"
 )

src/pkg/notifier/model/topic.go

@@ -42,6 +42,8 @@ const (
 
 	// WebhookTopic is topic for sending webhook payload
 	WebhookTopic = "http"
+	// SlackTopic is topic for sending slack payload
+	SlackTopic = "slack"
 	// EmailTopic is topic for sending email payload
 	EmailTopic = "email"
 )

src/pkg/notifier/topic/topics.go

@@ -31,6 +31,7 @@ func init() {
 		model.ScanningCompletedTopic: {&notification.ScanImagePreprocessHandler{}},
 		model.ScanningFailedTopic:    {&notification.ScanImagePreprocessHandler{}},
 		model.QuotaExceedTopic:       {&notification.QuotaPreprocessHandler{}},
+		model.SlackTopic:             {&notification.SlackHandler{}},
 	}
 
 	for t, handlers := range handlersMap {