119 lines
3.2 KiB
Haskell
119 lines
3.2 KiB
Haskell
module Helper
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( getUserIdFromText
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, extractKey
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-- , getUserNameById
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, fromHex
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, fromHex'
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, toHex
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, makeRandomToken
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, generateSalt
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, tagField
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, sendMail
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, generateString
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, removeItem
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)
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where
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import Prelude
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import Model
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import Control.Applicative
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import Control.Monad.Trans.Class
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import Data.Maybe
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import Data.Either
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import qualified Data.ByteString as B
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import qualified Data.ByteString.Lazy as BL
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import qualified Data.ByteString.Char8 as BC
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import qualified Data.Text as T
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import Database.Persist
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import Database.Persist.Types
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import System.FilePath
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import System.Random
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import Yesod.Persist.Core
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import Yesod.Core.Types
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import Yesod
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import Numeric (readHex, showHex)
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import Network.Mail.Mime
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import Text.Blaze.Html.Renderer.Utf8
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getUserIdFromText :: T.Text -> UserId
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getUserIdFromText tempUserId =
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Key $ PersistInt64 $ fromIntegral $ read $ T.unpack tempUserId
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extractKey :: KeyBackend backend entity -> T.Text
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extractKey = extractKey' . unKey
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where
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extractKey' (PersistInt64 k) = T.pack $ show k
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extractKey' _ = ""
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--getUserNameById :: UserId -> Text
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--getUserNameById userId =
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-- let
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-- user = runDB $ getJust $ userId
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-- in
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-- userName user
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fromHex :: String -> BL.ByteString
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fromHex = BL.pack . hexToWords
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where hexToWords (c:c':text) =
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let hex = [c, c']
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(word, _):_ = readHex hex
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in word : hexToWords text
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hexToWords _ = []
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-- strict variant
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fromHex' :: String -> B.ByteString
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fromHex' = B.concat . BL.toChunks . fromHex
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toHex :: B.ByteString -> T.Text
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toHex = T.pack . concatMap mapByte . B.unpack
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where mapByte = pad 2 '0' . flip showHex ""
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pad len padding s
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| length s < len = pad len padding $ padding:s
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| otherwise = s
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makeRandomToken :: IO T.Text
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makeRandomToken = (T.pack . take 16 . randoms) `fmap` newStdGen
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generateSalt :: IO B.ByteString
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generateSalt = (B.pack . take 8 . randoms) <$> getStdGen
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-- tagField :: Field Handler [T.Text]
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tagField = Field
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{ fieldParse = \rawVals _ -> do
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case rawVals of
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[x] -> case null [x] of
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False -> return $ Right $ Just $ removeItem "" $ T.splitOn " " x
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True -> return $ Right $ Nothing
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_ -> return $ Left $ error "unexpected tag list"
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, fieldView = \idAttr nameAttr val eResult isReq ->
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[whamlet|<input id=#{idAttr} type="text" name=#{nameAttr} value=#{either id (T.intercalate " ") eResult}>|]
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, fieldEnctype = UrlEncoded
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}
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sendMail :: MonadIO m => T.Text -> T.Text -> Html -> m ()
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sendMail toEmail subject body =
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liftIO $ renderSendMail
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Mail
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{ mailFrom = Address Nothing "noreply" -- TODO: set sender Address
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, mailTo = [Address Nothing toEmail]
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, mailCc = []
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, mailBcc = []
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, mailHeaders = [("Subject", subject)]
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, mailParts = [[Part
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{ partType = "text/html; charset=utf-8"
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, partEncoding = None
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, partFilename = Nothing
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, partHeaders = []
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, partContent = renderHtml body
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}]]
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}
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generateString :: IO T.Text
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generateString = (toHex . B.pack . take 16 . randoms) <$> newStdGen
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removeItem :: Eq a => a -> [a] -> [a]
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removeItem _ [] = []
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removeItem x (y:ys)
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| x == y = removeItem x ys
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| otherwise = y : removeItem x ys
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