src/Mail.hs


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{-# LANGUAGE OverloadedStrings #-}

module Mail
  ( send
  ) where

import Data.Text (Text)
import qualified Data.Text as T
import Data.Either (isLeft)

import Control.Exception (SomeException, try)
import Control.Arrow (left)

import qualified Network.Mail.Mime as Mime

import Model.Mail (Mail)
import qualified Model.Mail as Mail

send :: Mail -> IO (Either Text ())
send mail = do
  result <- left (T.pack . show) <$> (try (Mime.renderSendMail . getMimeMail $ mail) :: IO (Either SomeException ()))
  if isLeft result
    then putStrLn ("Error sending the following email:" ++ (show mail))
    else return ()
  return result

getMimeMail :: Mail -> Mime.Mail
getMimeMail mail =
  let fromMail = Mime.emptyMail . address . Mail.from $ mail
  in  fromMail
        { Mime.mailTo = map address . Mail.to $ mail
        , Mime.mailParts =
            [ [ Mime.plainPart . Mail.plainBody $ mail
              , Mime.htmlPart . Mail.htmlBody $ mail
              ]
            ]
        , Mime.mailHeaders = [("Subject", Mail.subject mail)]
        }

address :: Text -> Mime.Address
address addressEmail =
  Mime.Address
    { Mime.addressName = Nothing
    , Mime.addressEmail = addressEmail
    }