feat: adding webhooks as a notification channel type

alert/alertlog/store.go

@@ -290,6 +290,8 @@ func (s *Store) logAny(ctx context.Context, tx *sql.Tx, insertStmt *sql.Stmt, id
 			switch ncType {
 			case notificationchannel.TypeSlack:
 				r.subject.classifier = "Slack"
+			case notificationchannel.TypeWebhook:
+				r.subject.classifier = "Webhook"
 			}
 			r.subject.channelID.String = src.ID
 			r.subject.channelID.Valid = true
@@ -344,6 +346,8 @@ func (s *Store) logAny(ctx context.Context, tx *sql.Tx, insertStmt *sql.Stmt, id
 				r.subject.classifier = "SMS"
 			case notification.DestTypeUserEmail:
 				r.subject.classifier = "Email"
+			case notification.DestTypeChanWebhook:
+				fallthrough
 			case notification.DestTypeUserWebhook:
 				r.subject.classifier = "Webhook"
 			case notification.DestTypeSlackChannel:

app/startup.go

@@ -70,7 +70,10 @@ func (app *App) startup(ctx context.Context) error {
 
 	app.initStartup(ctx, "Startup.Slack", app.initSlack)
 	app.notificationManager.RegisterSender(notification.DestTypeUserEmail, "smtp", email.NewSender(ctx))
-	app.notificationManager.RegisterSender(notification.DestTypeUserWebhook, "webhook", webhook.NewSender(ctx))
+	app.notificationManager.RegisterSender(notification.DestTypeUserWebhook, "webhook-user", webhook.NewSender(ctx))
+	if expflag.ContextHas(ctx, expflag.ChanWebhook) {
+		app.notificationManager.RegisterSender(notification.DestTypeChanWebhook, "webhook-channel", webhook.NewSender(ctx))
+	}
 
 	app.initStartup(ctx, "Startup.Engine", app.initEngine)
 	app.initStartup(ctx, "Startup.Auth", app.initAuth)

assignment/targettype.go

@@ -25,6 +25,7 @@ const (
 	TargetTypeUser
 	TargetTypeNotificationChannel
 	TargetTypeSlackChannel
+	TargetTypeChanWebhook
 	TargetTypeIntegrationKey
 	TargetTypeUserOverride
 	TargetTypeNotificationRule
@@ -61,6 +62,8 @@ func (tt *TargetType) UnmarshalText(data []byte) error {
 		*tt = TargetTypeNotificationChannel
 	case "slackChannel":
 		*tt = TargetTypeSlackChannel
+	case "chanWebhook":
+		*tt = TargetTypeChanWebhook
 	case "userOverride":
 		*tt = TargetTypeUserOverride
 	case "contactMethod":
@@ -111,6 +114,8 @@ func (tt TargetType) MarshalText() ([]byte, error) {
 		return []byte("notificationChannel"), nil
 	case TargetTypeSlackChannel:
 		return []byte("slackChannel"), nil
+	case TargetTypeChanWebhook:
+		return []byte("chanWebhook"), nil
 	case TargetTypeContactMethod:
 		return []byte("contactMethod"), nil
 	case TargetTypeNotificationRule:

escalation/store.go

@@ -3,15 +3,18 @@ package escalation
 import (
 	"context"
 	"database/sql"
+	"net/url"
 
 	"github.com/target/goalert/alert/alertlog"
 	"github.com/target/goalert/assignment"
+	"github.com/target/goalert/expflag"
 	"github.com/target/goalert/notification/slack"
 	"github.com/target/goalert/notificationchannel"
 	"github.com/target/goalert/permission"
 	"github.com/target/goalert/util"
 	"github.com/target/goalert/util/log"
 	"github.com/target/goalert/util/sqlutil"
+	"github.com/target/goalert/validation"
 	"github.com/target/goalert/validation/validate"
 
 	"github.com/google/uuid"
@@ -31,7 +34,7 @@ type Store struct {
 	ncStore *notificationchannel.Store
 	slackFn func(ctx context.Context, channelID string) (*slack.Channel, error)
 
-	findSlackChan *sql.Stmt
+	findNotifChan *sql.Stmt
 
 	findOnePolicy          *sql.Stmt
 	findOnePolicyForUpdate *sql.Stmt
@@ -64,13 +67,13 @@ func NewStore(ctx context.Context, db *sql.DB, cfg Config) (*Store, error) {
 		slackFn: cfg.SlackLookupFunc,
 		ncStore: cfg.NCStore,
 
-		findSlackChan: p.P(`
+		findNotifChan: p.P(`
 			SELECT chan.id
 			FROM notification_channels chan
 			JOIN escalation_policy_actions act ON
 				act.escalation_policy_step_id = $1 AND
 				act.channel_id = chan.id
-			WHERE chan.value = $2 and chan.type = 'SLACK'
+			WHERE chan.value = $2 and chan.type = $3
 		`),
 
 		findOnePolicy: p.P(`
@@ -286,6 +289,22 @@ func (s *Store) _updateStepTarget(ctx context.Context, stepID string, tgt assign
 	return err
 }
 
+func (s *Store) chanWebhook(ctx context.Context, tx *sql.Tx, webhookTarget assignment.Target) (assignment.Target, error) {
+	webhookUrl, err := url.Parse(webhookTarget.TargetID())
+	if err != nil {
+		return nil, err
+	}
+	notifID, err := s.ncStore.MapToID(ctx, tx, &notificationchannel.Channel{
+		Type:  notificationchannel.TypeWebhook,
+		Name:  webhookUrl.Hostname(),
+		Value: webhookTarget.TargetID(),
+	})
+	if err != nil {
+		return nil, err
+	}
+	return assignment.NotificationChannelTarget(notifID.String()), nil
+}
+
 func (s *Store) newSlackChannel(ctx context.Context, tx *sql.Tx, slackChanID string) (assignment.Target, error) {
 	ch, err := s.slackFn(ctx, slackChanID)
 	if err != nil {
@@ -304,9 +323,9 @@ func (s *Store) newSlackChannel(ctx context.Context, tx *sql.Tx, slackChanID str
 	return assignment.NotificationChannelTarget(notifID.String()), nil
 }
 
-func (s *Store) lookupSlackChannel(ctx context.Context, tx *sql.Tx, stepID, slackChanID string) (assignment.Target, error) {
+func (s *Store) lookupNotifChannel(ctx context.Context, tx *sql.Tx, stepID, chanID, chanType string) (assignment.Target, error) {
 	var notifChanID string
-	err := tx.StmtContext(ctx, s.findSlackChan).QueryRowContext(ctx, stepID, slackChanID).Scan(&notifChanID)
+	err := tx.StmtContext(ctx, s.findNotifChan).QueryRowContext(ctx, stepID, chanID, chanType).Scan(&notifChanID)
 	if err != nil {
 		return nil, err
 	}
@@ -323,14 +342,31 @@ func (s *Store) AddStepTargetTx(ctx context.Context, tx *sql.Tx, stepID string,
 			return err
 		}
 	}
+	if tgt.TargetType() == assignment.TargetTypeChanWebhook {
+		if !expflag.ContextHas(ctx, expflag.ChanWebhook) {
+			return validation.NewFieldError("type", "Webhook notification channels are not enabled")
+		}
+		var err error
+		tgt, err = s.chanWebhook(ctx, tx, tgt)
+		if err != nil {
+			return err
+		}
+	}
 	return s._updateStepTarget(ctx, stepID, tgt, tx.StmtContext(ctx, s.addStepTarget), true)
 }
 
 // DeleteStepTargetTx removes the target from the step.
 func (s *Store) DeleteStepTargetTx(ctx context.Context, tx *sql.Tx, stepID string, tgt assignment.Target) error {
 	if tgt.TargetType() == assignment.TargetTypeSlackChannel {
 		var err error
-		tgt, err = s.lookupSlackChannel(ctx, tx, stepID, tgt.TargetID())
+		tgt, err = s.lookupNotifChannel(ctx, tx, stepID, tgt.TargetID(), "SLACK")
+		if err != nil {
+			return err
+		}
+	}
+	if tgt.TargetType() == assignment.TargetTypeChanWebhook {
+		var err error
+		tgt, err = s.lookupNotifChannel(ctx, tx, stepID, tgt.TargetID(), "WEBHOOK")
 		if err != nil {
 			return err
 		}
@@ -389,6 +425,9 @@ func (s *Store) FindAllStepTargetsTx(ctx context.Context, tx *sql.Tx, stepID str
 			case notificationchannel.TypeSlack:
 				tgt.ID = chValue.String
 				tgt.Type = assignment.TargetTypeSlackChannel
+			case notificationchannel.TypeWebhook:
+				tgt.ID = chValue.String
+				tgt.Type = assignment.TargetTypeChanWebhook
 			default:
 				tgt.ID = ch.String
 				tgt.Type = assignment.TargetTypeNotificationChannel
@@ -678,7 +717,6 @@ func (s *Store) CreateStepTx(ctx context.Context, tx *sql.Tx, st *Step) (*Step,
 	}
 
 	s.logChange(ctx, tx, st.PolicyID)
-
 	return n, nil
 }
 

expflag/flags.go

@@ -5,13 +5,15 @@ import "sort"
 type Flag string
 
 const (
-	Example Flag = "example"
-	SlackDM Flag = "slack-dm"
+	Example     Flag = "example"
+	SlackDM     Flag = "slack-dm"
+	ChanWebhook Flag = "chan-webhook"
 )
 
 var desc = map[Flag]string{
-	Example: "An example experimental flag to demonstrate usage.",
-	SlackDM: "Enables sending notifications to Slack DMs as a user contact method.",
+	Example:     "An example experimental flag to demonstrate usage.",
+	SlackDM:     "Enables sending notifications to Slack DMs as a user contact method.",
+	ChanWebhook: "Enables webhooks as a notification channel type",
 }
 
 // AllFlags returns a slice of all experimental flags sorted by name.

graphql2/schema.graphql

@@ -1176,6 +1176,7 @@ enum TargetType {
   service
   schedule
   user
+  chanWebhook
   integrationKey
   userOverride
   notificationRule

migrate/migrations/20221207150447-webhook-notification-channel-type.sql

@@ -0,0 +1,5 @@
+-- +migrate Up
+
+ALTER TYPE enum_notif_channel_type ADD VALUE IF NOT EXISTS 'WEBHOOK';
+
+-- +migrate Down

notification/desttype.go

@@ -43,6 +43,7 @@ const (
 	DestTypeSlackDM
 	DestTypeUserEmail
 	DestTypeUserWebhook
+	DestTypeChanWebhook
 )
 
 func (d Dest) String() string { return fmt.Sprintf("%s(%s)", d.Type.String(), d.ID) }
@@ -77,6 +78,8 @@ func (t ScannableDestType) DestType() DestType {
 	switch t.NC {
 	case notificationchannel.TypeSlack:
 		return DestTypeSlackChannel
+	case notificationchannel.TypeWebhook:
+		return DestTypeChanWebhook
 	}
 
 	return DestTypeUnknown
@@ -87,6 +90,8 @@ func (t DestType) NCType() notificationchannel.Type {
 	switch t {
 	case DestTypeSlackChannel:
 		return notificationchannel.TypeSlack
+	case DestTypeChanWebhook:
+		return notificationchannel.TypeWebhook
 	}
 
 	return notificationchannel.TypeUnknown

notificationchannel/channel.go

@@ -22,7 +22,7 @@ func (c Channel) Normalize() (*Channel, error) {
 	err := validate.Many(
 		validate.UUID("ID", c.ID),
 		validate.Text("Name", c.Name, 1, 255),
-		validate.OneOf("Type", c.Type, TypeSlack),
+		validate.OneOf("Type", c.Type, TypeSlack, TypeWebhook),
 	)
 
 	switch c.Type {

notificationchannel/type.go

@@ -10,6 +10,7 @@ type Type string
 const (
 	TypeUnknown Type = ""
 	TypeSlack   Type = "SLACK"
+	TypeWebhook Type = "WEBHOOK"
 )
 
 // Valid returns true if t is a known Type.

web/src/expflag.d.ts

@@ -1,3 +1,3 @@
 // Code generated by expflag/cmd/tsgen DO NOT EDIT.
 
-type ExpFlag = 'example' | 'slack-dm'
+type ExpFlag = 'chan-webhook' | 'example' | 'slack-dm'

web/src/schema.d.ts

@@ -935,6 +935,7 @@ export type TargetType =
   | 'service'
   | 'schedule'
   | 'user'
+  | 'chanWebhook'
   | 'integrationKey'
   | 'userOverride'
   | 'notificationRule'