driver

type Conn interface {
	// Send an SMS from one number to another. It's up to each individual
	// SMS driver to specify the format of the numbers.
	Send(from, to, msg string) error

	// Close the connection.
	Close() error
}

type Driver interface {
	// Open returns a new connection to the SMS server. The name is a string
	// in a driver-specific format.
	Open(name string, e *echo.Echo) (Conn, error)
}

type PhoneNumber interface {
	// Valid determines if a specific phone number is valid for a given
	// SMS driver.
	Valid() bool
}

type SMS interface {
	// From is the sending phone number.
	From() string

	// To are all of the receiving phone numbers.
	To() []string

	// Content is the body of the message. Currently there is no support for
	// MMS, but we'd like to add it.
	Content() string
}