Fix people deletion

Signed-off-by: Sacha Al Himdani <sacha@getprobo.com>

pkg/coredata/people.go

@@ -22,6 +22,7 @@ import (
 	"time"
 
 	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgconn"
 	"go.gearno.de/kit/pg"
 	"go.probo.inc/probo/pkg/gid"
 	"go.probo.inc/probo/pkg/mail"
@@ -52,6 +53,10 @@ type (
 	ErrPeopleAlreadyExists struct {
 		message string
 	}
+
+	ErrPeopleReferenced struct {
+		message string
+	}
 )
 
 func (e ErrPeopleNotFound) Error() string {
@@ -62,6 +67,10 @@ func (e ErrPeopleAlreadyExists) Error() string {
 	return e.message
 }
 
+func (e ErrPeopleReferenced) Error() string {
+	return e.message
+}
+
 func (p People) CursorKey(orderBy PeopleOrderField) page.CursorKey {
 	switch orderBy {
 	case PeopleOrderFieldCreatedAt:
@@ -349,7 +358,19 @@ DELETE FROM peoples WHERE %s AND id = @people_id
 	maps.Copy(args, scope.SQLArguments())
 
 	_, err := conn.Exec(ctx, q, args)
-	return err
+	if err != nil {
+		var pgErr *pgconn.PgError
+		if errors.As(err, &pgErr) {
+			if pgErr.Code == "23503" {
+				return &ErrPeopleReferenced{
+					message: fmt.Sprintf("person with id %s cannot be deleted because it is referenced by other records", p.ID),
+				}
+			}
+		}
+		return fmt.Errorf("cannot delete person: %w", err)
+	}
+
+	return nil
 }
 
 func (p *Peoples) CountByOrganizationID(

pkg/server/api/console/v1/v1_resolver.go

@@ -2126,6 +2126,10 @@ func (r *mutationResolver) DeletePeople(ctx context.Context, input types.DeleteP
 
 	err := prb.Peoples.Delete(ctx, input.PeopleID)
 	if err != nil {
+		var errReferenced *coredata.ErrPeopleReferenced
+		if errors.As(err, &errReferenced) {
+			return nil, gqlutils.Conflict(errReferenced)
+		}
 		panic(fmt.Errorf("cannot delete people: %w", err))
 	}