fix: cleanup some todos (#3642)

* cleanup todo

* fix: some todos

internal/command/user.go

@@ -340,6 +340,38 @@ func (c *Commands) userDomainClaimed(ctx context.Context, userID string) (events
 	}, changedUserGrant, nil
 }
 
+func (c *Commands) prepareUserDomainClaimed(userID string) preparation.Validation {
+	return func() (_ preparation.CreateCommands, err error) {
+		return func(ctx context.Context, filter preparation.FilterToQueryReducer) ([]eventstore.Command, error) {
+			userWriteModel, err := userWriteModelByID(ctx, filter, userID, "")
+			if err != nil {
+				return nil, err
+			}
+			if !userWriteModel.UserState.Exists() {
+				return nil, caos_errs.ThrowNotFound(nil, "COMMAND-ii9K0", "Errors.User.NotFound")
+			}
+			domainPolicy, err := domainPolicyWriteModel(ctx, filter)
+			if err != nil {
+				return nil, err
+			}
+			userAgg := UserAggregateFromWriteModel(&userWriteModel.WriteModel)
+
+			id, err := c.idGenerator.Next()
+			if err != nil {
+				return nil, err
+			}
+
+			return []eventstore.Command{user.NewDomainClaimedEvent(
+				ctx,
+				userAgg,
+				fmt.Sprintf("%s@temporary.%s", id, authz.GetInstance(ctx).RequestedDomain()),
+				userWriteModel.UserName,
+				domainPolicy.UserLoginMustBeDomain),
+			}, nil
+		}, nil
+	}
+}
+
 func (c *Commands) UserDomainClaimedSent(ctx context.Context, orgID, userID string) (err error) {
 	if userID == "" {
 		return caos_errs.ThrowInvalidArgument(nil, "COMMAND-5m0fs", "Errors.IDMissing")
@@ -414,3 +446,17 @@ func ExistsUser(ctx context.Context, filter preparation.FilterToQueryReducer, id
 func newUserInitCode(ctx context.Context, filter preparation.FilterToQueryReducer, alg crypto.EncryptionAlgorithm) (value *crypto.CryptoValue, expiry time.Duration, err error) {
 	return newCryptoCodeWithExpiry(ctx, filter, domain.SecretGeneratorTypeInitCode, alg)
 }
+
+func userWriteModelByID(ctx context.Context, filter preparation.FilterToQueryReducer, userID, resourceOwner string) (*UserWriteModel, error) {
+	user := NewUserWriteModel(userID, resourceOwner)
+	events, err := filter(ctx, user.Query())
+	if err != nil {
+		return nil, err
+	}
+	if len(events) == 0 {
+		return nil, nil
+	}
+	user.AppendEvents(events...)
+	err = user.Reduce()
+	return user, err
+}