package services import ( "database/sql" "errors" "go-cook/api/models" "go-cook/api/repositories" "strings" "golang.org/x/crypto/bcrypt" ) const ( ErrPasswordNotLongEnough = "password needs to be 8 character or longer" ErrPasswordMissingSpecialCharacter = "password needs to contain one of the following: !, @, #" ErrInvalidPassword = "invalid password" ) // This will handle operations that are user related, but one layer higher then the repository type UserService struct { repo repositories.IUserTable } func NewUserService(conn *sql.DB) UserService { return UserService{ repo: repositories.NewUserRepository(conn), } } func (us UserService) DoesUserExist(username string) error { _, err := us.repo.GetByName(username) if err != nil { return err } return nil } func (us UserService) DoesPasswordMatchHash(username, password string) error { //passwordBytes := []byte(password) //hash, err := bcrypt.GenerateFromPassword(passwordBytes, bcrypt.DefaultCost) //if err != nil { // return err //} model, err := us.GetUser(username) if err != nil { return err } err = bcrypt.CompareHashAndPassword([]byte(model.Hash), []byte(password)) if err != nil { return errors.New(ErrInvalidPassword) } return nil } func (us UserService) GetUser(username string) (models.UserModel, error) { return us.repo.GetByName(username) } func (us UserService) CreateNewUser(name, password string) (models.UserModel, error) { err := us.CheckPasswordForRequirements(password) if err != nil { return models.UserModel{}, err } us.repo.Create(name, password) return models.UserModel{}, nil } func (us UserService) CheckPasswordForRequirements(password string) error { err := us.checkPasswordLength(password) if err != nil { return err } err = us.checkPasswordForSpecialCharacters(password) if err != nil { return err } return nil } func (us UserService) checkPasswordLength(password string) error { if len(password) < 8 { return errors.New(ErrPasswordNotLongEnough) } return nil } func (us UserService) checkPasswordForSpecialCharacters(password string) error { var chars []string chars = append(chars, "!") chars = append(chars, "@") chars = append(chars, "#") for _, char := range chars { if strings.Contains(password, char) { return nil } } return errors.New(ErrPasswordMissingSpecialCharacter) }