module Network.EmailSend.SMTP(SMTPBackend(..)) where

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---- STDLIB
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---- SITE-PACKAGES
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import Data.ByteString (ByteString)
import qualified Network.HaskellNet.SMTP as SMTP
import Network.EmailSend (MailBackend(..), SendingReceipt)

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---- LOCAL
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data SMTPBackend = SMTPBackend String String

instance MailBackend SMTPBackend where
    sendMessage = smtpSendMessage

smtpSendMessage :: SMTPBackend -> String -> String -> ByteString ->
                   IO SendingReceipt
smtpSendMessage (SMTPBackend server hostname) from to message = (do
    c <- SMTP.connectSMTP server
    SMTP.sendCommand c $ SMTP.EHLO hostname
    SMTP.sendCommand c $ SMTP.MAIL from
    SMTP.sendCommand c $ SMTP.RCPT to
    SMTP.sendCommand c $ SMTP.DATA message
    SMTP.sendCommand c SMTP.NOOP
    SMTP.sendCommand c SMTP.QUIT
    return Nothing) `catch` (\m -> return $ Just $ show m)