feat(API): optional display name on users

internal/infrastructure/persistence/mappers/userMapper.go

@@ -26,6 +26,7 @@ func UserToDomain(m models.User) user.User {
 		Password:                m.Password,
 		PasswordResetCode:       nullableStringToDomain(m.PasswordResetCode),
 		Email:                   m.Email,
+		DisplayName:             m.DisplayName,
 		IsVerified:              m.IsVerified,
 		VerificationCode:        nullableStringToDomain(m.VerificationCode),
 		VerificationExpiration:  m.VerificationExpiration,
@@ -42,6 +43,7 @@ func UserToModel(a user.User) models.User {
 		Password:                a.Password,
 		PasswordResetCode:       DomainToNullableString(a.PasswordResetCode),
 		Email:                   a.Email,
+		DisplayName:             a.DisplayName,
 		IsVerified:              a.IsVerified,
 		VerificationCode:        DomainToNullableString(a.VerificationCode),
 		VerificationExpiration:  a.VerificationExpiration,

internal/infrastructure/persistence/models/userModel.go

@@ -10,6 +10,7 @@ type User struct {
 	Password                string  `gorm:"not null"`
 	PasswordResetCode       *string `gorm:"unique"`
 	Email                   string  `gorm:"unique;not null"`
+	DisplayName             string  `gorm:"not null;default:''"`
 	IsVerified              bool    `gorm:"default=false;not null"`
 	VerificationCode        *string `gorm:"unique"`
 	VerificationExpiration  time.Time

internal/infrastructure/persistence/repositories/userRepository.go

@@ -169,4 +169,20 @@ func (u *UserRepository) ResetPassword(userId uint32, hashedPassword string) (do
 	return mappers.UserToDomain(localUser), nil
 }
 
+func (u *UserRepository) UpdateDisplayName(userId uint32, displayName string) (domainUser.User, error) {
+	var localUser entity.User
+	err := u.db.Model(&entity.User{}).First(&localUser, userId).Error
+	if err != nil {
+		return domainUser.User{}, mapNotFoundErr(err, domainUser.ErrUserNotFound)
+	}
+
+	localUser.DisplayName = displayName
+	err = u.db.Save(&localUser).Error
+	if err != nil {
+		return domainUser.User{}, err
+	}
+
+	return mappers.UserToDomain(localUser), nil
+}
+
 var _ domainUser.Repository = &UserRepository{}

internal/infrastructure/useCases/UpdateUserProfile.go

@@ -0,0 +1,25 @@
+package useCases
+
+import (
+	"RenewCMS/internal/domain/user"
+	"strings"
+	"unicode/utf8"
+)
+
+const maxDisplayNameRunes = 60
+
+type UpdateUserProfileUseCase struct {
+	userRepository user.Repository
+}
+
+func NewUpdateUserProfileUseCase(userRepository user.Repository) *UpdateUserProfileUseCase {
+	return &UpdateUserProfileUseCase{userRepository}
+}
+
+func (u *UpdateUserProfileUseCase) UpdateDisplayName(userId uint32, displayName string) (user.User, error) {
+	trimmed := strings.TrimSpace(displayName)
+	if utf8.RuneCountInString(trimmed) > maxDisplayNameRunes {
+		return user.User{}, user.ErrInvalidDisplayName
+	}
+	return u.userRepository.UpdateDisplayName(userId, trimmed)
+}