domain

type DependencyContainer struct {
	Repository              Repository
	Sender                  Sender
	TestTakerService        TestTakerService
	ErrorHandler            ErrorHandler
	FromEmailAddress        EmailAddress
	ThanksEmail             Email
	FetchTestTakersInterval time.Duration
}

type Email struct {
	Subject string
	Body    string
}

type EmailAddress struct {
	Name    string
	Address string
}

type ErrorHandler interface {
	HandleCriticalError(err error)
	HandleError(err error)
}

type Repository interface {
	StoreLastFinishedAt(timestamp int) (err error)
	FetchLastFinishedAt() (timestamp int, err error)
	StoreFailedTestTakerEmail(email TestTakerEmail) (err error)
	StoreTestTakerEmail(email TestTakerEmail) (err error)
	FetchEmailForTestTaker(testTaker TestTaker) (testTakerEmail *TestTakerEmail, err error)
}

type Sender interface {
	Send(to, from EmailAddress, email Email) error
}

type TestTaker struct {
	ID         int
	Name       string
	Email      string
	IsDemo     bool
	Percent    int
	FinishedAt int
}

type TestTakerEmail struct {
	TestTakerId int
	Email       string
}

type TestTakerService interface {
	GetNewTestTakers(repository Repository, errorHandler ErrorHandler) (testTakers []TestTaker, err error)
}

type Validator interface {
	EmailIsValid(email string) bool
}