module Handler.InventoryListing where

import Import
import Handler.Common

getInventoryListingR, postInventoryListingR :: Handler TypedContent
getInventoryListingR = postInventoryListingR
postInventoryListingR = do
  ((insertResult, fsInsertForm), fsInsertEncoding) <- runFormPost $ itemForm Nothing

  case insertResult of 
    FormSuccess (Item{..} `WithType` t) -> runDB $ do
      upsertBy (UniqueKind itemNormKind) (Kind itemNormKind t) [ KindType =. t ]
      insert Item{..}
      return ()
    FormFailure errors -> mapM_ (addMessage "formError" . toHtml) errors
    _ -> return ()

  (sortOn (entityVal . typedVal) -> stock) <- runDB $ mapM withType =<< selectList [] []

  selectRep $ do
    provideJson (stock :: [WithType (Entity Item)])
    provideRep . defaultLayout $ inventoryListing InventoryState
      { invFormState = Just InsertForm{..}
      , ..
      }

putInventoryListingR :: Handler Value
putInventoryListingR = do
  (Item{..} `WithType` t) <- requireCheckJsonBody
  returnJson <=< runDB $ do
    upsertBy (UniqueKind itemNormKind) (Kind itemNormKind t) [ KindType =. t ]
    withType =<< insertEntity Item{..}