# This represents a particular mail object which will need to be sent
# A mail_object requires the mail attributes and the delivery_settings

module SinatraMore
  class MailObject
    def initialize(mail_attributes={}, smtp_settings={})
      @mail_attributes = mail_attributes.dup
      @smtp_settings = smtp_settings.dup if smtp_settings.present?
    end

    # Constructs the delivery attributes for the message and then sends the mail
    # @mail_object.deliver
    def deliver
      @mail_attributes.reverse_merge!(:via => self.delivery_method.to_sym)
      @mail_attributes.reverse_merge!(:smtp => @smtp_settings) if using_smtp?
      self.send_mail(@mail_attributes)
    end

    protected

    # Returns the delivery method to use for this mail object
    # @mo.delivery_method => :smtp || :sendmail
    def delivery_method
      @mail_attributes[:via] || (@smtp_settings.present? ? :smtp : :sendmail)
    end

    # Returns true if the mail object is going to be delivered using smtp
    def using_smtp?
      delivery_method.to_s =~ /smtp/
    end

    # Performs the actual email sending using a third-party library
    def send_mail(delivery_attributes)
      Pony.mail(delivery_attributes) && true
    end
  end
end