module Yesod.Text.Markdown where
import Yesod.Core (RenderMessage)
import Text.Hamlet (hamlet)
import Yesod.Form
import Yesod.Core (HandlerSite)
import Yesod.Core.Widget
import Yesod.Persist
import Data.Text (Text)
import Data.Text.Lazy (toStrict, fromStrict)
import Text.Markdown (Markdown (Markdown))
import Database.Persist.Sql
instance PersistField Markdown where
toPersistValue (Markdown t) = PersistText $ toStrict t
fromPersistValue (PersistText t) = Right $ Markdown $ fromStrict t
fromPersistValue _ = Left "Not a PersistText value"
instance PersistFieldSql Markdown where
sqlType _ = SqlString
markdownField :: (Monad m, RenderMessage (HandlerSite m) FormMessage) => Field m Markdown
markdownField = Field
{ fieldParse = parseHelper $ Right . Markdown . fromStrict
, fieldView = \theId name attrs val _isReq -> toWidget
[hamlet|$newline never
<textarea id="#{theId}" name="#{name}" *{attrs}>#{either id extractStrict val}
|]
, fieldEnctype = UrlEncoded
}
where
extractStrict :: Markdown -> Text
extractStrict (Markdown lt) = toStrict lt