graph(oidc): Consume UserSignedIn events in graph service

Pass them to the identity backend to update the last sign-in date of the user.

services/graph/pkg/service/v0/graph.go

@@ -13,7 +13,6 @@ import (
 	"github.com/go-chi/chi/v5"
 	"github.com/jellydator/ttlcache/v3"
 	"go-micro.dev/v4/client"
-	mevents "go-micro.dev/v4/events"
 	"go.opentelemetry.io/otel/trace"
 	"google.golang.org/protobuf/types/known/emptypb"
 
@@ -28,11 +27,6 @@ import (
 	"github.com/owncloud/ocis/v2/services/graph/pkg/identity"
 )
 
-// Publisher is the interface for events publisher
-type Publisher interface {
-	Publish(string, interface{}, ...mevents.PublishOption) error
-}
-
 // Permissions is the interface used to access the permissions service
 type Permissions interface {
 	ListPermissions(ctx context.Context, req *settingssvc.ListPermissionsRequest, opts ...client.CallOption) (*settingssvc.ListPermissionsResponse, error)
@@ -68,6 +62,7 @@ type Graph struct {
 	valueService             settingssvc.ValueService
 	specialDriveItemsCache   *ttlcache.Cache[string, interface{}]
 	eventsPublisher          events.Publisher
+	eventsConsumer           events.Consumer
 	searchService            searchsvc.SearchProviderService
 	keycloakClient           keycloak.Client
 	historyClient            ehsvc.EventHistoryService

services/graph/pkg/service/v0/option.go

@@ -1,6 +1,7 @@
 package svc
 
 import (
+	"context"
 	"net/http"
 
 	gateway "github.com/cs3org/go-cs3apis/cs3/gateway/v1beta1"
@@ -22,6 +23,7 @@ type Option func(o *Options)
 
 // Options defines the available options for this package.
 type Options struct {
+	Context                  context.Context
 	Logger                   log.Logger
 	Config                   *config.Config
 	Middleware               []func(http.Handler) http.Handler
@@ -34,6 +36,7 @@ type Options struct {
 	ValueService             settingssvc.ValueService
 	RoleManager              *roles.Manager
 	EventsPublisher          events.Publisher
+	EventsConsumer           events.Consumer
 	SearchService            searchsvc.SearchProviderService
 	KeycloakClient           keycloak.Client
 	EventHistoryClient       ehsvc.EventHistoryService
@@ -51,6 +54,13 @@ func newOptions(opts ...Option) Options {
 	return opt
 }
 
+// Context provides a function to set the context option.
+func Context(ctx context.Context) Option {
+	return func(o *Options) {
+		o.Context = ctx
+	}
+}
+
 // Logger provides a function to set the logger option.
 func Logger(val log.Logger) Option {
 	return func(o *Options) {
@@ -142,6 +152,13 @@ func EventsPublisher(val events.Publisher) Option {
 	}
 }
 
+// EventsConsumer provides a function to set the EventsConsumer option.
+func EventsConsumer(val events.Consumer) Option {
+	return func(o *Options) {
+		o.EventsConsumer = val
+	}
+}
+
 // KeycloakClient provides a function to set the KeycloakCient option.
 func KeycloakClient(val keycloak.Client) Option {
 	return func(o *Options) {

services/graph/pkg/service/v0/service.go

@@ -1,6 +1,7 @@
 package svc
 
 import (
+	"context"
 	"crypto/tls"
 	"crypto/x509"
 	"errors"
@@ -16,10 +17,13 @@ import (
 	"github.com/jellydator/ttlcache/v3"
 	microstore "go-micro.dev/v4/store"
 
+	"github.com/cs3org/reva/v2/pkg/events"
 	"github.com/cs3org/reva/v2/pkg/rgrpc/todo/pool"
 	"github.com/cs3org/reva/v2/pkg/store"
+	"github.com/cs3org/reva/v2/pkg/utils"
 
 	ocisldap "github.com/owncloud/ocis/v2/ocis-pkg/ldap"
+	"github.com/owncloud/ocis/v2/ocis-pkg/log"
 	"github.com/owncloud/ocis/v2/ocis-pkg/registry"
 	"github.com/owncloud/ocis/v2/ocis-pkg/roles"
 	"github.com/owncloud/ocis/v2/ocis-pkg/service/grpc"
@@ -148,6 +152,7 @@ func NewService(opts ...Option) (Graph, error) { //nolint:maintidx
 		mux:                      m,
 		specialDriveItemsCache:   spacePropertiesCache,
 		eventsPublisher:          options.EventsPublisher,
+		eventsConsumer:           options.EventsConsumer,
 		searchService:            options.SearchService,
 		identityEducationBackend: options.IdentityEducationBackend,
 		keycloakClient:           options.KeycloakClient,
@@ -515,6 +520,39 @@ func setIdentityBackends(options Options, svc *Graph) error {
 		svc.identityBackend = options.IdentityBackend
 	}
 
+	return svc.StartListenForLogonEvents(options.Context, options.Logger)
+}
+
+func (g *Graph) StartListenForLogonEvents(ctx context.Context, l log.Logger) error {
+	if g.eventsConsumer == nil {
+		return nil
+	}
+	var _registeredEvents = []events.Unmarshaller{
+		events.UserSignedIn{},
+	}
+	evChannel, err := events.Consume(g.eventsConsumer, "graph", _registeredEvents...)
+	if err != nil {
+		l.Error().Err(err).Msg("cannot consume from nats")
+		return err
+	}
+	go func() {
+		for loop := true; loop; {
+			select {
+			case e := <-evChannel:
+				switch ev := e.Event.(type) {
+				default:
+					l.Error().Interface("event", e).Msg("unhandled event")
+				case events.UserSignedIn:
+					if err := g.identityBackend.UpdateLastSignInDate(ctx, ev.Executant.OpaqueId, utils.TSToTime(ev.Timestamp)); err != nil {
+						l.Error().Err(err).Str("userid", ev.Executant.OpaqueId).Msg("Error updating last sign in date")
+					}
+				}
+			case <-ctx.Done():
+				l.Info().Msg("context cancelled")
+				loop = false
+			}
+		}
+	}()
 	return nil
 }