Manage errors

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

pkg/coredata/trust_center_reference.go

@@ -16,6 +16,7 @@ package coredata
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"maps"
 	"time"
@@ -23,6 +24,7 @@ import (
 	"github.com/getprobo/probo/pkg/gid"
 	"github.com/getprobo/probo/pkg/page"
 	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgconn"
 	"go.gearno.de/kit/pg"
 )
 
@@ -42,12 +44,20 @@ type (
 	TrustCenterReferences []*TrustCenterReference
 
 	ErrTrustCenterReferenceNotFound struct {
-		ID string
+		Identifier string
+	}
+
+	ErrTrustCenterReferenceAlreadyExists struct {
+		message string
 	}
 )
 
 func (e ErrTrustCenterReferenceNotFound) Error() string {
-	return fmt.Sprintf("trust center reference not found: %s", e.ID)
+	return fmt.Sprintf("trust center reference not found: %q", e.Identifier)
+}
+
+func (e ErrTrustCenterReferenceAlreadyExists) Error() string {
+	return e.message
 }
 
 func (t TrustCenterReference) CursorKey(orderBy TrustCenterReferenceOrderField) page.CursorKey {
@@ -156,6 +166,14 @@ RETURNING rank;
 
 	err := conn.QueryRow(ctx, q, args).Scan(&t.Rank)
 	if err != nil {
+		var pgErr *pgconn.PgError
+		if errors.As(err, &pgErr) {
+			if pgErr.Code == "23505" && pgErr.ConstraintName == "trust_center_references_trust_center_id_rank_key" {
+				return &ErrTrustCenterReferenceAlreadyExists{
+					message: fmt.Sprintf("trust center reference with trust_center_id %s and rank already exists", t.TrustCenterID),
+				}
+			}
+		}
 		return fmt.Errorf("cannot insert trust center reference: %w", err)
 	}
 
@@ -198,7 +216,7 @@ WHERE
 	}
 
 	if result.RowsAffected() == 0 {
-		return ErrTrustCenterReferenceNotFound{ID: t.ID.String()}
+		return ErrTrustCenterReferenceNotFound{Identifier: t.ID.String()}
 	}
 
 	return nil