chore: build

backend/internal/modules/users/repository.go

@@ -9,16 +9,14 @@ import (
 	"gorm.io/gorm"
 )
 
-var ErrNotFound = errors.New("user not found")
-var ErrEmailTaken = errors.New("email already in use")
-
 type Repository interface {
 	Create(ctx context.Context, user *User) error
-	FindByEmail(ctx context.Context, email string) (*User, error)
+	FindByUsername(ctx context.Context, username string) (*User, error)
 	FindByID(ctx context.Context, id uuid.UUID) (*User, error)
 	List(ctx context.Context) ([]*User, error)
 	Update(ctx context.Context, user *User) error
 	Delete(ctx context.Context, id uuid.UUID) error
+	CountByRole(ctx context.Context, role string) (int64, error)
 }
 
 type gormRepository struct {
@@ -32,16 +30,16 @@ func NewRepository(db *gorm.DB) Repository {
 func (r *gormRepository) Create(ctx context.Context, user *User) error {
 	if err := r.db.WithContext(ctx).Create(user).Error; err != nil {
 		if isUniqueViolation(err) {
-			return ErrEmailTaken
+			return ErrUsernameTaken
 		}
 		return err
 	}
 	return nil
 }
 
-func (r *gormRepository) FindByEmail(ctx context.Context, email string) (*User, error) {
+func (r *gormRepository) FindByUsername(ctx context.Context, username string) (*User, error) {
 	var user User
-	err := r.db.WithContext(ctx).Where("email = ?", email).First(&user).Error
+	err := r.db.WithContext(ctx).Where("username = ?", username).First(&user).Error
 	if errors.Is(err, gorm.ErrRecordNotFound) {
 		return nil, ErrNotFound
 	}
@@ -63,6 +61,20 @@ func (r *gormRepository) FindByID(ctx context.Context, id uuid.UUID) (*User, err
 	return &user, nil
 }
 
+func (r *gormRepository) CountByRole(ctx context.Context, role string) (int64, error) {
+	var count int64
+
+	err := r.db.WithContext(ctx).
+		Model(&User{}).
+		Where("role = ?", role).
+		Count(&count).Error
+
+	if err != nil {
+		return 0, err
+	}
+
+	return count, nil
+}
 func (r *gormRepository) List(ctx context.Context) ([]*User, error) {
 	var list []*User
 	if err := r.db.WithContext(ctx).Order("created_at asc").Find(&list).Error; err != nil {
@@ -74,7 +86,7 @@ func (r *gormRepository) List(ctx context.Context) ([]*User, error) {
 func (r *gormRepository) Update(ctx context.Context, user *User) error {
 	err := r.db.WithContext(ctx).Save(user).Error
 	if isUniqueViolation(err) {
-		return ErrEmailTaken
+		return ErrUsernameTaken
 	}
 	return err
 }
@@ -91,7 +103,7 @@ func (r *gormRepository) Delete(ctx context.Context, id uuid.UUID) error {
 }
 
 // isUniqueViolation reports whether err is a Postgres unique-constraint
-// violation (SQLSTATE 23505), e.g. a duplicate email.
+// violation (SQLSTATE 23505), e.g. a duplicate username.
 func isUniqueViolation(err error) bool {
 	var pgErr *pgconn.PgError
 	return errors.As(err, &pgErr) && pgErr.Code == "23505"