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Cleanup

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This commit is contained in:
Gregor Kleen 2018-03-19 12:29:55 +01:00
parent 170442cff0
commit 28d9c5c95b
1 changed files with 27 additions and 14 deletions
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41
src/Handler/Utils/Table/Pagination.hs
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@ -8,7 +8,13 @@
, ViewPatterns
#-}
module Handler.Utils.Table.Pagination where
module Handler.Utils.Table.Pagination
( SortColumn(..), SortDirection(..)
, DBTable(..)
, PaginationSettings(..)
, PSValidator(..)
, dbTable
) where
import Import
import qualified Database.Esqueleto as E
@ -16,9 +22,12 @@ import qualified Database.Esqueleto.Internal.Sql as E (SqlSelect)
import Text.Blaze (Attribute)
import qualified Text.Blaze.Html5.Attributes as Html5
import Data.CaseInsensitive (CI)
import qualified Data.CaseInsensitive as CI
import Control.Monad.RWS hiding ((<>), Foldable(..), mapM_)
import Data.Map (Map)
import Data.Map (Map, (!))
import Colonnade hiding (bool, fromMaybe)
import Yesod.Colonnade
@ -29,8 +38,16 @@ import Data.Ratio ((%))
data SortColumn = forall a. PersistField a => SortColumn { getSortColumn :: E.SqlExpr (E.Value a) }
data SortDirection = SortAsc | SortDesc
deriving (Eq, Ord, Enum, Show, Read)
instance PathPiece SortDirection where
toPathPiece SortAsc = "asc"
toPathPiece SortDesc = "desc"
fromPathPiece (CI.mk -> t)
| t == "asc" = Just SortAsc
| t == "desc" = Just SortDesc
| otherwise = Nothing
sqlSortDirection :: (SortColumn, SortDirection) -> E.SqlExpr E.OrderBy
sqlSortDirection (SortColumn e, SortAsc ) = E.asc e
@ -49,7 +66,7 @@ data DBTable = forall a r h i.
}
data PaginationSettings = PaginationSettings
{ psSorting :: [(SortColumn, SortDirection)]
{ psSorting :: [(Text, SortDirection)]
, psLimit :: Int64
, psPage :: Int64
, psShortcircuit :: Bool
@ -78,16 +95,11 @@ dbTable :: PSValidator -> DBTable -> Handler Widget
dbTable PSValidator{..} DBTable{ dbtIdent = (toPathPiece -> dbtIdent), .. } = do
let
sortingOptions = mkOptionList
[ Option t' (c, d) t'
| (t, c) <- mapToList dbtSorting
[ Option t' (t, d) t'
| (t, _) <- mapToList dbtSorting
, d <- [SortAsc, SortDesc]
, let t' = t <> "-" <> tshow d
, let t' = t <> "-" <> toPathPiece d
]
sortingField = Field parse (\_ _ _ _ _ -> return ()) UrlEncoded
where
parse optlist _ = case mapM (olReadExternal sortingOptions) optlist of
Nothing -> return $ Left "Error parsing values"
Just res -> return $ Right $ Just res
(_, defPS) = runPSValidator Nothing
wIdent n
| not $ null dbtIdent = dbtIdent <> "-" <> n
@ -97,7 +109,7 @@ dbTable PSValidator{..} DBTable{ dbtIdent = (toPathPiece -> dbtIdent), .. } = do
| otherwise = dbtAttrs
psResult <- runInputGetResult $ PaginationSettings
<$> ireq sortingField (wIdent "sorting")
<$> ireq (multiSelectField $ return sortingOptions) (wIdent "sorting")
<*> (fromMaybe (psLimit defPS) <$> iopt intField (wIdent "pagesize"))
<*> (fromMaybe (psPage defPS) <$> iopt intField (wIdent "page"))
<*> ireq checkBoxField (wIdent "table-only")
@ -112,13 +124,14 @@ dbTable PSValidator{..} DBTable{ dbtIdent = (toPathPiece -> dbtIdent), .. } = do
FormSuccess ps -> runPSValidator $ Just ps
FormFailure errs -> first (map SomeMessage errs <>) $ runPSValidator Nothing
FormMissing -> runPSValidator Nothing
psSorting' = map (first (dbtSorting !)) psSorting
sqlQuery' = dbtSQLQuery
<* E.orderBy (map sqlSortDirection psSorting)
<* E.orderBy (map sqlSortDirection psSorting')
<* E.limit psLimit
<* E.offset (psPage * psLimit)
mapM_ (addMessageI "warning") errs
(rows, [E.Value rowCount]) <- runDB $ (,) <$> E.select sqlQuery' <*> E.select (E.countRows <$ dbtSQLQuery :: E.SqlQuery (E.SqlExpr (E.Value Int64)))
bool return (sendResponse <=< tblLayout) psShortcircuit $ do