feat: custom content type icons, built-in types, user lookup

internal/domain/user/userDomain.go

@@ -2,6 +2,7 @@ package user
 
 import (
 	"errors"
+	"strings"
 	"time"
 )
 
@@ -15,8 +16,11 @@ var ErrInvalidPasswordResetCode = errors.New("invalid password reset code")
 var ErrPasswordResetCodeExpired = errors.New("password reset code expired")
 var ErrInvalidDisplayName = errors.New("invalid display name")
 var ErrUsernameTaken = errors.New("username taken")
+var ErrInvalidLookup = errors.New("invalid user lookup")
 var ErrVerificationEmailNotSent = errors.New("verification email not sent")
 
+const MaxLookupIDs = 100
+
 type Role string
 
 const (
@@ -40,3 +44,10 @@ type User struct {
 	CreatedAt               time.Time `json:"created_at"`
 	UpdatedAt               time.Time `json:"updated_at"`
 }
+
+func (u User) NameOrUsername() string {
+	if trimmed := strings.TrimSpace(u.DisplayName); trimmed != "" {
+		return trimmed
+	}
+	return u.Username
+}