Добавлен основные классы для сервиса авторизаци

internal/service/user.go

@@ -0,0 +1,44 @@
+package service
+
+import (
+	"authorization/internal"
+	"authorization/internal/repository"
+)
+
+type UserService interface {
+	CreateUser(internal.User) (int, error)
+	ChangeUserRole(username string, Role string) (string, error)
+	GetUser(username string, hashedPassword string) (*internal.User, error)
+}
+
+type UserServiceImpl struct {
+	repo repository.UserResository
+}
+
+func newUserService(repo repository.UserResository) *UserServiceImpl {
+	return &UserServiceImpl{repo: repo}
+}
+
+func (s *UserServiceImpl) CreateUser(user internal.User) (int, error) {
+	return s.repo.CreateUser(user)
+}
+
+func (s *UserServiceImpl) ChangeUserRole(username string, userRole string) (string, error) {
+	newRole, err := internal.FromString(userRole)
+	if err != nil {
+		return "", err
+	}
+	user, err := s.repo.UpdateUserRole(username, newRole)
+	if err != nil {
+		return "", err
+	}
+	return user, nil
+}
+
+func (s *UserServiceImpl) GetUser(username string, hashedPassword string) (*internal.User, error) {
+	user, err := s.repo.GetUser(username, hashedPassword)
+	if err != nil {
+		return nil, err
+	}
+	return &user, nil
+}