fix: migrate external id of federated users (#6312)

* feat: migrate external id

* implement tests and some renaming

* fix projection

* cleanup

* i18n

* fix event type

* handle migration for new services as well

* typo

internal/query/projection/idp_user_link.go

@@ -77,6 +77,10 @@ func (p *idpUserLinkProjection) reducers() []handler.AggregateReducer {
 					Event:  user.UserRemovedType,
 					Reduce: p.reduceUserRemoved,
 				},
+				{
+					Event:  user.UserIDPExternalIDMigratedType,
+					Reduce: p.reduceExternalIDMigrated,
+				},
 			},
 		},
 		{
@@ -195,6 +199,27 @@ func (p *idpUserLinkProjection) reduceUserRemoved(event eventstore.Event) (*hand
 	), nil
 }
 
+func (p *idpUserLinkProjection) reduceExternalIDMigrated(event eventstore.Event) (*handler.Statement, error) {
+	e, err := assertEvent[*user.UserIDPExternalIDMigratedEvent](event)
+	if err != nil {
+		return nil, errors.ThrowInvalidArgumentf(nil, "HANDL-AS3th", "reduce.wrong.event.type %s", user.UserIDPExternalIDMigratedType)
+	}
+
+	return crdb.NewUpdateStatement(e,
+		[]handler.Column{
+			handler.NewCol(IDPUserLinkChangeDateCol, e.CreationDate()),
+			handler.NewCol(IDPUserLinkSequenceCol, e.Sequence()),
+			handler.NewCol(IDPUserLinkExternalUserIDCol, e.NewID),
+		},
+		[]handler.Condition{
+			handler.NewCond(IDPUserLinkIDPIDCol, e.IDPConfigID),
+			handler.NewCond(IDPUserLinkUserIDCol, e.Aggregate().ID),
+			handler.NewCond(IDPUserLinkExternalUserIDCol, e.PreviousID),
+			handler.NewCond(IDPUserLinkInstanceIDCol, e.Aggregate().InstanceID),
+		},
+	), nil
+}
+
 func (p *idpUserLinkProjection) reduceIDPConfigRemoved(event eventstore.Event) (*handler.Statement, error) {
 	var idpID string
 

internal/query/projection/idp_user_link_test.go

@@ -207,6 +207,42 @@ func TestIDPUserLinkProjection_reduces(t *testing.T) {
 				},
 			},
 		},
+		{
+			name: "reduceExternalIDMigrated",
+			args: args{
+				event: getEvent(testEvent(
+					repository.EventType(user.UserIDPExternalIDMigratedType),
+					user.AggregateType,
+					[]byte(`{
+	"idpConfigId": "idp-config-id",
+    "previousId": "previous-id",
+	"newId": "new-id"
+}`),
+				), eventstore.GenericEventMapper[user.UserIDPExternalIDMigratedEvent]),
+			},
+			reduce: (&idpUserLinkProjection{}).reduceExternalIDMigrated,
+			want: wantReduce{
+				aggregateType:    user.AggregateType,
+				sequence:         15,
+				previousSequence: 10,
+				executer: &testExecuter{
+					executions: []execution{
+						{
+							expectedStmt: "UPDATE projections.idp_user_links3 SET (change_date, sequence, external_user_id) = ($1, $2, $3) WHERE (idp_id = $4) AND (user_id = $5) AND (external_user_id = $6) AND (instance_id = $7)",
+							expectedArgs: []interface{}{
+								anyArg{},
+								uint64(15),
+								"new-id",
+								"idp-config-id",
+								"agg-id",
+								"previous-id",
+								"instance-id",
+							},
+						},
+					},
+				},
+			},
+		},
 		{
 			name: "org IDPConfigRemovedEvent",
 			args: args{