-- | documents
module Handler.Doc where

import Import
import Yesod.Core.Types
import Web.MangoPay
import Yesod.MangoPay
import Control.Monad.Trans.Resource (runResourceT)
import Data.Maybe (fromJust)
import Data.Conduit (($$))
import Data.Conduit.Binary (sinkLbs)
import Data.ByteString.Lazy (toStrict)

-- | get the upload form
getDocR :: AnyUserID -> Handler Html
getDocR uid= do
  (widget, enctype) <- generateFormPost uploadForm
  defaultLayout $ do
        setTitleI MsgTitleDocument
        $(widgetFile "docupload")

-- | upload doc and file and show result
postDocR :: AnyUserID -> Handler Html
postDocR uid=do
   ((result, _), _) <- runFormPost uploadForm
   case result of
     FormSuccess (DocUpload fi tag typ)->
        catchMP (do
          let doc=Document Nothing Nothing tag typ (Just CREATED) Nothing Nothing
          docWritten0<-runYesodMPTToken $ createDocument uid doc
          bs<-liftIO $ runResourceT $ fileSourceRaw fi $$ sinkLbs
          runYesodMPTToken $ createPage uid (fromJust $ dId docWritten0) $ toStrict bs
          -- setting to validated causes internal server error...
          docWritten<-runYesodMPTToken $ modifyDocument uid (docWritten0{dStatus=Just VALIDATION_ASKED})
          defaultLayout $ do
            setTitleI MsgDocDone
            $(widgetFile "doc")
          )
          (\e->do
            setMessage $ toHtml $ show e
            redirect $ DocR uid
          )
     _ -> do
            setMessageI MsgErrorDoc
            redirect $ DocR uid

-- | the upload data type
data DocUpload=DocUpload FileInfo (Maybe Text) DocumentType

-- | the upload form
uploadForm :: Html -> MForm Handler (FormResult DocUpload, Widget)
uploadForm= renderDivs $ DocUpload
  <$> fileAFormReq (localizedFS MsgDocFile)
  <*> aopt textField (localizedFS MsgDocCustomData) Nothing
  <*> areq (selectFieldList ranges) (localizedFS MsgDocType) Nothing
  -- <*> pure (Just CREATED) -- aopt (selectFieldList ranges) (fs MsgDocStatus) Nothing