Manage errors

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

pkg/coredata/trust_center.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"
 )
 
@@ -39,8 +41,24 @@ type (
 	}
 
 	TrustCenters []*TrustCenter
+
+	ErrTrustCenterNotFound struct {
+		Identifier string
+	}
+
+	ErrTrustCenterAlreadyExists struct {
+		message string
+	}
 )
 
+func (e ErrTrustCenterNotFound) Error() string {
+	return fmt.Sprintf("trust center not found: %q", e.Identifier)
+}
+
+func (e ErrTrustCenterAlreadyExists) Error() string {
+	return e.message
+}
+
 func (tc *TrustCenter) CursorKey(orderBy TrustCenterOrderField) page.CursorKey {
 	switch orderBy {
 	case TrustCenterOrderFieldCreatedAt:
@@ -218,6 +236,14 @@ INSERT INTO trust_centers (
 
 	_, err := conn.Exec(ctx, q, args)
 	if err != nil {
+		var pgErr *pgconn.PgError
+		if errors.As(err, &pgErr) {
+			if pgErr.Code == "23505" && pgErr.ConstraintName == "trust_centers_slug_key" {
+				return &ErrTrustCenterAlreadyExists{
+					message: fmt.Sprintf("trust center with slug %q already exists", tc.Slug),
+				}
+			}
+		}
 		return fmt.Errorf("cannot insert trust center: %w", err)
 	}