module Yesod.Form.Fields
(
FormMessage (..)
, defaultFormMessage
, textField
, passwordField
, textareaField
, hiddenField
, intField
, dayField
, timeField
, htmlField
, emailField
, searchField
, selectField
, multiSelectField
, AutoFocus
, urlField
, doubleField
, parseDate
, parseTime
, Textarea (..)
, radioField
, boolField
, fileAFormReq
, fileAFormOpt
, selectField'
, radioField'
, Option (..)
, OptionList (..)
, mkOptionList
, optionsPersist
, optionsPairs
, optionsEnum
) where
import Yesod.Form.Types
import Yesod.Form.I18n.English
import Yesod.Widget
import Yesod.Message (RenderMessage (renderMessage), SomeMessage (..))
import Text.Hamlet
import Text.Blaze (ToHtml (..), preEscapedText, unsafeByteString)
import Text.Cassius
import Data.Time (Day, TimeOfDay(..))
import qualified Text.Email.Validate as Email
import Network.URI (parseURI)
import Database.Persist (PersistField)
import Text.HTML.SanitizeXSS (sanitizeBalance)
import Control.Monad (when, unless)
import Data.List (intersect, nub)
import Data.Either (rights)
import Data.Maybe (catMaybes, listToMaybe)
import qualified Blaze.ByteString.Builder.Html.Utf8 as B
import Blaze.ByteString.Builder (writeByteString, toLazyByteString)
import Blaze.ByteString.Builder.Internal.Write (fromWriteList)
import Text.Blaze.Renderer.String (renderHtml)
import qualified Data.ByteString as S
import qualified Data.ByteString.Lazy as L
import Data.Text (Text, unpack, pack)
import qualified Data.Text.Read
import Control.Monad.Trans.Class (lift)
import Control.Applicative ((<$>))
import qualified Data.Map as Map
import Yesod.Handler (newIdent, liftIOHandler)
import Yesod.Request (FileInfo)
import Yesod.Core (toSinglePiece, GGHandler, SinglePiece)
import Yesod.Persist (selectList, runDB, Filter, SelectOpt, YesodPersistBackend, Key, YesodPersist, PersistEntity, PersistBackend)
import Control.Arrow ((&&&))
#if __GLASGOW_HASKELL__ >= 700
#define WHAMLET whamlet
#define HAMLET hamlet
#define CASSIUS cassius
#define JULIUS julius
#define HTML html
#else
#define WHAMLET $whamlet
#define HAMLET $hamlet
#define CASSIUS $cassius
#define JULIUS $julius
#define HTML $html
#endif
defaultFormMessage :: FormMessage -> Text
defaultFormMessage = englishFormMessage
blank :: (Monad m, RenderMessage master FormMessage)
=> (Text -> Either FormMessage a) -> [Text] -> m (Either (SomeMessage master) (Maybe a))
blank _ [] = return $ Right Nothing
blank _ ("":_) = return $ Right Nothing
blank f (x:_) = return $ either (Left . SomeMessage) (Right . Just) $ f x
intField :: (Integral i, RenderMessage master FormMessage) => Field sub master i
intField = Field
{ fieldParse = blank $ \s ->
case Data.Text.Read.signed Data.Text.Read.decimal s of
Right (a, "") -> Right a
_ -> Left $ MsgInvalidInteger s
, fieldView = \theId name val isReq -> addHamlet
[HAMLET|\
<input id="#{theId}" name="#{name}" type="number" :isReq:required="" value="#{showVal val}">
|]
}
where
showVal = either id (pack . showI)
showI x = show (fromIntegral x :: Integer)
doubleField :: RenderMessage master FormMessage => Field sub master Double
doubleField = Field
{ fieldParse = blank $ \s ->
case Data.Text.Read.double s of
Right (a, "") -> Right a
_ -> Left $ MsgInvalidNumber s
, fieldView = \theId name val isReq -> addHamlet
[HAMLET|\
<input id="#{theId}" name="#{name}" type="text" :isReq:required="" value="#{showVal val}">
|]
}
where showVal = either id (pack . show)
dayField :: RenderMessage master FormMessage => Field sub master Day
dayField = Field
{ fieldParse = blank $ parseDate . unpack
, fieldView = \theId name val isReq -> addHamlet
[HAMLET|\
<input id="#{theId}" name="#{name}" type="date" :isReq:required="" value="#{showVal val}">
|]
}
where showVal = either id (pack . show)
timeField :: RenderMessage master FormMessage => Field sub master TimeOfDay
timeField = Field
{ fieldParse = blank $ parseTime . unpack
, fieldView = \theId name val isReq -> addHamlet
[HAMLET|\
<input id="#{theId}" name="#{name}" :isReq:required="" value="#{showVal val}">
|]
}
where
showVal = either id (pack . show . roundFullSeconds)
roundFullSeconds tod =
TimeOfDay (todHour tod) (todMin tod) fullSec
where
fullSec = fromInteger $ floor $ todSec tod
htmlField :: RenderMessage master FormMessage => Field sub master Html
htmlField = Field
{ fieldParse = blank $ Right . preEscapedText . sanitizeBalance
, fieldView = \theId name val _isReq -> addHamlet
[HAMLET|\
<textarea id="#{theId}" name="#{name}" .html>#{showVal val}
|]
}
where showVal = either id (pack . renderHtml)
newtype Textarea = Textarea { unTextarea :: Text }
deriving (Show, Read, Eq, PersistField)
instance ToHtml Textarea where
toHtml =
unsafeByteString
. S.concat
. L.toChunks
. toLazyByteString
. fromWriteList writeHtmlEscapedChar
. unpack
. unTextarea
where
writeHtmlEscapedChar '\n' = writeByteString "<br>"
writeHtmlEscapedChar c = B.writeHtmlEscapedChar c
textareaField :: RenderMessage master FormMessage => Field sub master Textarea
textareaField = Field
{ fieldParse = blank $ Right . Textarea
, fieldView = \theId name val _isReq -> addHamlet
[HAMLET|\
<textarea id="#{theId}" name="#{name}">#{either id unTextarea val}
|]
}
hiddenField :: RenderMessage master FormMessage => Field sub master Text
hiddenField = Field
{ fieldParse = blank $ Right
, fieldView = \theId name val _isReq -> addHamlet
[HAMLET|\
<input type="hidden" id="#{theId}" name="#{name}" value="#{either id id val}">
|]
}
textField :: RenderMessage master FormMessage => Field sub master Text
textField = Field
{ fieldParse = blank $ Right
, fieldView = \theId name val isReq ->
[WHAMLET|
<input id="#{theId}" name="#{name}" type="text" :isReq:required value="#{either id id val}">
|]
}
passwordField :: RenderMessage master FormMessage => Field sub master Text
passwordField = Field
{ fieldParse = blank $ Right
, fieldView = \theId name val isReq -> addHamlet
[HAMLET|\
<input id="#{theId}" name="#{name}" type="password" :isReq:required="" value="#{either id id val}">
|]
}
readMay :: Read a => String -> Maybe a
readMay s = case reads s of
(x, _):_ -> Just x
[] -> Nothing
parseDate :: String -> Either FormMessage Day
parseDate = maybe (Left MsgInvalidDay) Right
. readMay . replace '/' '-'
replace :: Eq a => a -> a -> [a] -> [a]
replace x y = map (\z -> if z == x then y else z)
parseTime :: String -> Either FormMessage TimeOfDay
parseTime (h2:':':m1:m2:[]) = parseTimeHelper ('0', h2, m1, m2, '0', '0')
parseTime (h1:h2:':':m1:m2:[]) = parseTimeHelper (h1, h2, m1, m2, '0', '0')
parseTime (h1:h2:':':m1:m2:' ':'A':'M':[]) =
parseTimeHelper (h1, h2, m1, m2, '0', '0')
parseTime (h1:h2:':':m1:m2:' ':'P':'M':[]) =
let [h1', h2'] = show $ (read [h1, h2] :: Int) + 12
in parseTimeHelper (h1', h2', m1, m2, '0', '0')
parseTime (h1:h2:':':m1:m2:':':s1:s2:[]) =
parseTimeHelper (h1, h2, m1, m2, s1, s2)
parseTime _ = Left MsgInvalidTimeFormat
parseTimeHelper :: (Char, Char, Char, Char, Char, Char)
-> Either FormMessage TimeOfDay
parseTimeHelper (h1, h2, m1, m2, s1, s2)
| h < 0 || h > 23 = Left $ MsgInvalidHour $ pack [h1, h2]
| m < 0 || m > 59 = Left $ MsgInvalidMinute $ pack [m1, m2]
| s < 0 || s > 59 = Left $ MsgInvalidSecond $ pack [s1, s2]
| otherwise = Right $ TimeOfDay h m s
where
h = read [h1, h2]
m = read [m1, m2]
s = fromInteger $ read [s1, s2]
emailField :: RenderMessage master FormMessage => Field sub master Text
emailField = Field
{ fieldParse = blank $
\s -> if Email.isValid (unpack s)
then Right s
else Left $ MsgInvalidEmail s
, fieldView = \theId name val isReq -> addHamlet
[HAMLET|\
<input id="#{theId}" name="#{name}" type="email" :isReq:required="" value="#{either id id val}">
|]
}
type AutoFocus = Bool
searchField :: RenderMessage master FormMessage => AutoFocus -> Field sub master Text
searchField autoFocus = Field
{ fieldParse = blank Right
, fieldView = \theId name val isReq -> do
[WHAMLET|\
<input id="#{theId}" name="#{name}" type="search" :isReq:required="" :autoFocus:autofocus="" value="#{either id id val}">
|]
when autoFocus $ do
[WHAMLET|\<script>if (!('autofocus' in document.createElement('input'))) {document.getElementById('#{theId}').focus();}</script>
|]
addCassius [CASSIUS|
#{theId}
webkitappearance: textfield
|]
}
urlField :: RenderMessage master FormMessage => Field sub master Text
urlField = Field
{ fieldParse = blank $ \s ->
case parseURI $ unpack s of
Nothing -> Left $ MsgInvalidUrl s
Just _ -> Right s
, fieldView = \theId name val isReq ->
[WHAMLET|
<input ##{theId} name=#{name} type=url :isReq:required value=#{either id id val}>
|]
}
selectField :: (Eq a, RenderMessage master FormMessage) => [(Text, a)] -> Field sub master a
selectField = selectField' . optionsPairs
selectField' :: (Eq a, RenderMessage master FormMessage) => GGHandler sub master IO (OptionList a) -> Field sub master a
selectField' = selectFieldHelper
(\theId name inside -> [WHAMLET|<select ##{theId} name=#{name}>^{inside}|])
(\_theId _name isSel -> [WHAMLET|<option value=none :isSel:selected>_{MsgSelectNone}|])
(\_theId _name value isSel text -> [WHAMLET|<option value=#{value} :isSel:selected>#{text}|])
multiSelectField :: (Show a, Eq a, RenderMessage master FormMessage) => [(Text, a)] -> Field sub master [a]
multiSelectField = multiSelectFieldHelper
(\theId name inside -> [WHAMLET|<select ##{theId} multiple name=#{name}>^{inside}|])
(\_theId _name value isSel text -> [WHAMLET|<option value=#{value} :isSel:selected>#{text}|])
radioField :: (Eq a, RenderMessage master FormMessage) => [(Text, a)] -> Field sub master a
radioField = radioField' . optionsPairs
radioField' :: (Eq a, RenderMessage master FormMessage) => GGHandler sub master IO (OptionList a) -> Field sub master a
radioField' = selectFieldHelper
(\theId _name inside -> [WHAMLET|<div ##{theId}>^{inside}|])
(\theId name isSel -> [WHAMLET|
<div>
<input id=#{theId}none type=radio name=#{name} value=none :isSel:checked>
<label for=#{theId}none>_{MsgSelectNone}
|])
(\theId name value isSel text -> [WHAMLET|
<div>
<input id=#{theId}-#{value} type=radio name=#{name} value=#{value} :isSel:checked>
<label for=#{theId}-#{value}>#{text}
|])
boolField :: RenderMessage master FormMessage => Field sub master Bool
boolField = Field
{ fieldParse = return . boolParser
, fieldView = \theId name val isReq -> [WHAMLET|
$if not isReq
<input id=#{theId}none type=radio name=#{name} value=none checked>
<label for=#{theId}none>_{MsgSelectNone}
<input id=#{theId}yes type=radio name=#{name} value=yes :showVal id val:checked>
<label for=#{theId}yes>_{MsgBoolYes}
<input id=#{theId}no type=radio name=#{name} value=no :showVal not val:checked>
<label for=#{theId}no>_{MsgBoolNo}
|]
}
where
boolParser [] = Right Nothing
boolParser (x:_) = case x of
"" -> Right Nothing
"none" -> Right Nothing
"yes" -> Right $ Just True
"no" -> Right $ Just False
t -> Left $ SomeMessage $ MsgInvalidBool t
showVal = either (\_ -> False)
multiSelectFieldHelper :: (Show a, Eq a)
=> (Text -> Text -> GWidget sub master () -> GWidget sub master ())
-> (Text -> Text -> Text -> Bool -> Text -> GWidget sub master ())
-> [(Text, a)] -> Field sub master [a]
multiSelectFieldHelper outside inside opts = Field
{ fieldParse = return . selectParser
, fieldView = \theId name vals _ ->
outside theId name $ do
flip mapM_ pairs $ \pair -> inside
theId
name
(pack $ show $ fst pair)
((fst pair) `elem` (either (\_ -> []) selectedVals vals))
(fst $ snd pair)
}
where
pairs = zip [1 :: Int ..] opts
rpairs = zip (map snd opts) [1 :: Int ..]
selectedVals vals = map snd $ filter (\y -> fst y `elem` vals) rpairs
selectParser [] = Right Nothing
selectParser xs | not $ null (["", "none"] `intersect` xs) = Right Nothing
| otherwise = (Right . Just . map snd . catMaybes . map (\y -> lookup y pairs) . nub . map fst . rights . map Data.Text.Read.decimal) xs
data OptionList a = OptionList
{ olOptions :: [Option a]
, olReadExternal :: Text -> Maybe a
}
mkOptionList :: [Option a] -> OptionList a
mkOptionList os = OptionList
{ olOptions = os
, olReadExternal = flip Map.lookup $ Map.fromList $ map (optionExternalValue &&& optionInternalValue) os
}
data Option a = Option
{ optionDisplay :: Text
, optionInternalValue :: a
, optionExternalValue :: Text
}
optionsPairs :: [(Text, a)] -> GGHandler sub master IO (OptionList a)
optionsPairs = return . mkOptionList . zipWith (\external (display, internal) -> Option
{ optionDisplay = display
, optionInternalValue = internal
, optionExternalValue = pack $ show external
}) [1 :: Int ..]
optionsEnum :: (Show a, Enum a, Bounded a) => GGHandler sub master IO (OptionList a)
optionsEnum = optionsPairs $ map (\x -> (pack $ show x, x)) [minBound..maxBound]
optionsPersist :: ( YesodPersist master, PersistEntity a, PersistBackend (YesodPersistBackend master) (GGHandler sub master IO)
, SinglePiece (Key (YesodPersistBackend master) a)
)
=> [Filter a] -> [SelectOpt a] -> (a -> Text) -> GGHandler sub master IO (OptionList (Key (YesodPersistBackend master) a, a))
optionsPersist filts ords toDisplay = fmap mkOptionList $ do
pairs <- runDB $ selectList filts ords
return $ map (\(key, value) -> Option
{ optionDisplay = toDisplay value
, optionInternalValue = (key, value)
, optionExternalValue = toSinglePiece key
}) pairs
selectFieldHelper
:: (Eq a, RenderMessage master FormMessage)
=> (Text -> Text -> GWidget sub master () -> GWidget sub master ())
-> (Text -> Text -> Bool -> GWidget sub master ())
-> (Text -> Text -> Text -> Bool -> Text -> GWidget sub master ())
-> GGHandler sub master IO (OptionList a) -> Field sub master a
selectFieldHelper outside onOpt inside opts' = Field
{ fieldParse = \x -> do
opts <- opts'
return $ selectParser opts x
, fieldView = \theId name val isReq -> do
opts <- fmap olOptions $ lift $ liftIOHandler opts'
outside theId name $ do
unless isReq $ onOpt theId name $ not $ render opts val `elem` map optionExternalValue opts
flip mapM_ opts $ \opt -> inside
theId
name
(optionExternalValue opt)
((render opts val) == optionExternalValue opt)
(optionDisplay opt)
}
where
render _ (Left _) = ""
render opts (Right a) = maybe "" optionExternalValue $ listToMaybe $ filter ((== a) . optionInternalValue) opts
selectParser _ [] = Right Nothing
selectParser opts (s:_) = case s of
"" -> Right Nothing
"none" -> Right Nothing
x -> case olReadExternal opts x of
Nothing -> Left $ SomeMessage $ MsgInvalidEntry x
Just y -> Right $ Just y
fileAFormReq :: (RenderMessage master msg, RenderMessage master FormMessage) => FieldSettings msg -> AForm sub master FileInfo
fileAFormReq fs = AForm $ \(master, langs) menvs ints -> do
let (name, ints') =
case fsName fs of
Just x -> (x, ints)
Nothing ->
let i' = incrInts ints
in (pack $ 'f' : show i', i')
id' <- maybe (pack <$> newIdent) return $ fsId fs
let (res, errs) =
case menvs of
Nothing -> (FormMissing, Nothing)
Just (_, fenv) ->
case Map.lookup name fenv of
Nothing ->
let t = renderMessage master langs MsgValueRequired
in (FormFailure [t], Just $ toHtml t)
Just fi -> (FormSuccess fi, Nothing)
let fv = FieldView
{ fvLabel = toHtml $ renderMessage master langs $ fsLabel fs
, fvTooltip = fmap (toHtml . renderMessage master langs) $ fsTooltip fs
, fvId = id'
, fvInput = [WHAMLET|
<input type=file name=#{name} ##{id'}>
|]
, fvErrors = errs
, fvRequired = True
}
return (res, (fv :), ints', Multipart)
fileAFormOpt :: (RenderMessage master msg, RenderMessage master FormMessage) => FieldSettings msg -> AForm sub master (Maybe FileInfo)
fileAFormOpt fs = AForm $ \(master, langs) menvs ints -> do
let (name, ints') =
case fsName fs of
Just x -> (x, ints)
Nothing ->
let i' = incrInts ints
in (pack $ 'f' : show i', i')
id' <- maybe (pack <$> newIdent) return $ fsId fs
let (res, errs) =
case menvs of
Nothing -> (FormMissing, Nothing)
Just (_, fenv) ->
case Map.lookup name fenv of
Nothing -> (FormSuccess Nothing, Nothing)
Just fi -> (FormSuccess $ Just fi, Nothing)
let fv = FieldView
{ fvLabel = toHtml $ renderMessage master langs $ fsLabel fs
, fvTooltip = fmap (toHtml . renderMessage master langs) $ fsTooltip fs
, fvId = id'
, fvInput = [WHAMLET|
<input type=file name=#{name} ##{id'}>
|]
, fvErrors = errs
, fvRequired = False
}
return (res, (fv :), ints', Multipart)
incrInts :: Ints -> Ints
incrInts (IntSingle i) = IntSingle $ i + 1
incrInts (IntCons i is) = (i + 1) `IntCons` is