374 lines
16 KiB
Haskell
374 lines
16 KiB
Haskell
{-# LANGUAGE RecordWildCards #-}
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{-# LANGUAGE NoImplicitPrelude #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE ViewPatterns #-}
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{-# LANGUAGE TemplateHaskell #-}
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{-# LANGUAGE QuasiQuotes #-}
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{-# LANGUAGE MultiParamTypeClasses #-}
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{-# LANGUAGE TypeFamilies #-}
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{-# LANGUAGE FlexibleContexts #-}
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module Handler.Course where
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import Import
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import Handler.Utils
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-- import Data.Time
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import qualified Data.Text as T
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import Data.Function ((&))
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-- import Yesod.Form.Bootstrap3
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import qualified Data.Map as Map
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import Colonnade hiding (fromMaybe,bool)
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-- import Yesod.Colonnade
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import qualified Database.Esqueleto as E
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import qualified Data.UUID.Cryptographic as UUID
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getCourseListR :: Handler TypedContent
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getCourseListR = redirect TermCurrentR
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getTermCurrentR :: Handler Html
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getTermCurrentR = do
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termIds <- runDB $ selectKeysList [TermActive ==. True] [Desc TermName]
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case fromNullable termIds of
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Nothing -> notFound
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(Just (maximum -> tid)) -> -- getTermCourseListR tid
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redirect $ TermCourseListR tid -- redirect avids problematic breadcrumbs, headings, etc.
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getTermCourseListR :: TermId -> Handler Html
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getTermCourseListR tid = do
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void . runDB $ get404 tid -- Just ensure the term exists
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let
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tableData :: E.SqlExpr (Entity Course) -> E.SqlQuery (E.SqlExpr (Entity Course), E.SqlExpr (E.Value Int64))
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tableData course = do
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E.where_ $ course E.^. CourseTerm E.==. E.val tid
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let
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participants = E.sub_select . E.from $ \courseParticipant -> do
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E.where_ $ courseParticipant E.^. CourseParticipantCourse E.==. course E.^. CourseId
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return (E.countRows :: E.SqlExpr (E.Value Int64))
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return (course, participants)
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psValidator = def
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& defaultSorting [("shorthand", SortAsc)]
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coursesTable <- dbTable psValidator $ DBTable
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{ dbtSQLQuery = tableData
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, dbtColonnade = widgetColonnade $ mconcat
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[ sortable (Just "shorthand") (textCell MsgCourse) $ anchorCell'
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(\(Entity _ Course{..}, _) -> CourseR courseTerm courseShorthand CShowR)
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(\(Entity _ Course{..}, _) -> toWidget courseShorthand)
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, sortable (Just "register-from") (textCell MsgRegisterFrom) $ \(Entity _ Course{..}, _) -> textCell $ display courseRegisterFrom
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, sortable (Just "register-to") (textCell MsgRegisterTo) $ \(Entity _ Course{..}, _) -> textCell $ display courseRegisterTo
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, sortable (Just "members") (textCell MsgCourseMembers) $ \(Entity _ Course{..}, E.Value num) -> textCell $ case courseCapacity of
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Nothing -> MsgCourseMembersCount num
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Just max -> MsgCourseMembersCountLimited num max
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]
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, dbtSorting = Map.fromList
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[ ( "shorthand"
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, SortColumn $ \course -> course E.^. CourseShorthand
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)
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, ( "register-from"
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, SortColumn $ \course -> course E.^. CourseRegisterFrom
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)
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, ( "register-to"
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, SortColumn $ \course -> course E.^. CourseRegisterTo
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)
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, ( "members"
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, SortColumn $ \course -> E.sub_select . E.from $ \courseParticipant -> do
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E.where_ $ courseParticipant E.^. CourseParticipantCourse E.==. course E.^. CourseId
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return (E.countRows :: E.SqlExpr (E.Value Int64))
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)
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]
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, dbtFilter = mempty
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, dbtStyle = def
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, dbtIdent = "courses" :: Text
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}
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defaultLayout $ do
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setTitleI . MsgTermCourseListTitle $ tid
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$(widgetFile "courses")
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getCShowR :: TermId -> Text -> Handler Html
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getCShowR tid csh = do
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mbAid <- maybeAuthId
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(courseEnt,(schoolMB,participants,registered)) <- runDB $ do
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courseEnt@(Entity cid course) <- getBy404 $ CourseTermShort tid csh
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dependent <- (,,)
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<$> get (courseSchool course) -- join
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<*> count [CourseParticipantCourse ==. cid] -- join
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<*> (case mbAid of -- TODO: Someone please refactor this late-night mess here!
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Nothing -> return False
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(Just aid) -> do
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regL <- getBy (UniqueParticipant aid cid)
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return $ isJust regL)
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return $ (courseEnt,dependent)
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let course = entityVal courseEnt
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(regWidget, regEnctype) <- generateFormPost $ identifyForm "registerBtn" $ registerForm registered $ courseRegisterSecret course
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registrationOpen <- (==Authorized) <$> isAuthorized (CourseR tid csh CRegisterR) True
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defaultLayout $ do
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setTitle $ [shamlet| #{toPathPiece tid} - #{csh}|]
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$(widgetFile "course")
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registerForm :: Bool -> Maybe Text -> Form Bool
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registerForm registered msecret extra = do
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(msecretRes', msecretView) <- case msecret of
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(Just _) | not registered -> bimap Just Just <$> (mreq textField (fslpI MsgCourseSecret "Code") Nothing)
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_ -> return (Nothing,Nothing)
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(btnRes, btnView) <- mreq (buttonField $ bool BtnRegister BtnDeregister registered) "buttonField ignores settings anyway" Nothing
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let widget = $(widgetFile "widgets/registerForm")
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let msecretRes | Just res <- msecretRes' = Just <$> res
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| otherwise = FormSuccess Nothing
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return (btnRes *> ((==msecret) <$> msecretRes), widget) -- checks that correct button was pressed, and ignores result of btnRes
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postCRegisterR :: TermId -> Text -> Handler Html
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postCRegisterR tid csh = do
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aid <- requireAuthId
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(cid, course, registered) <- runDB $ do
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(Entity cid course) <- getBy404 $ CourseTermShort tid csh
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registered <- isJust <$> (getBy $ UniqueParticipant aid cid)
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return (cid, course, registered)
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((regResult,_), _) <- runFormPost $ identifyForm "registerBtn" $ registerForm registered $ courseRegisterSecret course
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case regResult of
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(FormSuccess codeOk)
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| registered -> do
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runDB $ deleteBy $ UniqueParticipant aid cid
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addMessageI "info" MsgCourseDeregisterOk
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| codeOk -> do
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actTime <- liftIO $ getCurrentTime
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regOk <- runDB $ insertUnique $ CourseParticipant cid aid actTime
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when (isJust regOk) $ addMessageI "success" MsgCourseRegisterOk
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| otherwise -> addMessageI "danger" MsgCourseSecretWrong
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(_other) -> return () -- TODO check this!
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redirect $ CourseR tid csh CShowR
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getCourseNewR :: Handler Html
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getCourseNewR = do
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-- TODO: Defaults für Semester hier ermitteln und übergeben
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courseEditHandler True Nothing
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postCourseNewR :: Handler Html
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postCourseNewR = courseEditHandler False Nothing
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getCEditR :: TermId -> Text -> Handler Html
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getCEditR tid csh = do
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course <- runDB $ getBy $ CourseTermShort tid csh
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courseEditHandler True course
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postCEditR :: TermId -> Text -> Handler Html
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postCEditR tid csh = do
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course <- runDB $ getBy $ CourseTermShort tid csh
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courseEditHandler False course
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courseDeleteHandler :: Handler Html -- not called anywhere yet
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courseDeleteHandler = undefined
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{- TODO
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| False -- DELETE -- TODO: This no longer works that way!!! See new way in Handler.Term.termEditHandler
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, Just cid <- cfCourseId res -> do
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runDB $ deleteCascade cid -- TODO Sicherheitsabfrage einbauen!
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let cti = toPathPiece $ cfTerm res
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addMessage "info" [shamlet| Kurs #{cti}/#{cfShort res} wurde gelöscht!|]
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redirect $ TermCourseListR $ cfTerm res
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-}
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courseEditHandler :: Bool -> Maybe (Entity Course) -> Handler Html
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courseEditHandler isGet course = do
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aid <- requireAuthId -- TODO: Verify that Editor is owner of the Course to be Edited!!!
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((result, formWidget), formEnctype) <- runFormPost $ newCourseForm $ courseToForm <$> course
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case result of
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(FormSuccess res@(
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CourseForm { cfCourseId = Nothing
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, cfShort = csh
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, cfTerm = tid
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})) -> do -- create new course
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now <- liftIO getCurrentTime
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insertOkay <- runDB $ insertUnique $ Course
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{ courseName = cfName res
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, courseDescription = cfDesc res
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, courseLinkExternal = cfLink res
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, courseShorthand = cfShort res
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, courseTerm = cfTerm res
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, courseSchool = cfSchool res
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, courseCapacity = cfCapacity res
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, courseRegisterSecret = cfSecret res
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, courseMaterialFree = cfMatFree res
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, courseRegisterFrom = cfRegFrom res
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, courseRegisterTo = cfRegTo res
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, courseDeregisterUntil = cfDeRegUntil res
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}
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case insertOkay of
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(Just cid) -> do
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runDB $ do
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insert_ $ CourseEdit aid now cid
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insert_ $ Lecturer aid cid
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addMessageI "info" $ MsgCourseNewOk tid csh
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redirect $ TermCourseListR tid
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Nothing ->
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addMessageI "danger" $ MsgCourseNewDupShort tid csh
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(FormSuccess res@(
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CourseForm { cfCourseId = Just cid
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, cfShort = csh
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, cfTerm = tid
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})) -> do -- edit existing course
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now <- liftIO getCurrentTime
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-- addMessage "debug" [shamlet| #{show res}|]
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runDB $ do
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old <- get cid
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case old of
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Nothing -> addMessageI "error" $ MsgInvalidInput
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(Just oldCourse) -> do
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-- existing <- getBy $ CourseTermShort tid csh
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-- if ((entityKey <$> existing) /= Just cid)
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-- then addMessageI "danger" $ MsgCourseEditDupShort tid csh
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-- else do
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_updOkay <- replace cid ( -- TODO replaceUnique requires Eq?!
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Course { courseName = cfName res
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, courseDescription = cfDesc res
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, courseLinkExternal = cfLink res
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, courseShorthand = cfShort res
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, courseTerm = cfTerm res
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, courseSchool = cfSchool res
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, courseCapacity = cfCapacity res
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, courseRegisterSecret = cfSecret res
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, courseMaterialFree = cfMatFree res
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, courseRegisterFrom = cfRegFrom res
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, courseRegisterTo = cfRegTo res
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, courseDeregisterUntil = cfDeRegUntil res
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}
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)
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insert_ $ CourseEdit aid now cid
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-- if (isNothing updOkay)
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-- then do
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addMessageI "success" $ MsgCourseEditOk tid csh
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-- redirect $ TermCourseListR tid
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-- else addMessageI "danger" $ MsgCourseEditDupShort tid csh
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(FormFailure _) -> addMessageI "warning" MsgInvalidInput
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(FormMissing) | isGet -> return ()
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other -> addMessage "error" $ [shamlet| Error: #{show other}|]
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actionUrl <- fromMaybe CourseNewR <$> getCurrentRoute
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defaultLayout $ do
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setTitleI MsgCourseEditTitle
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$(widgetFile "formPage")
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data CourseForm = CourseForm
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{ cfCourseId :: Maybe CourseId -- Maybe CryptoUUIDCourse
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, cfName :: Text
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, cfDesc :: Maybe Html
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, cfLink :: Maybe Text
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, cfShort :: Text
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, cfTerm :: TermId
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, cfSchool :: SchoolId
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, cfCapacity :: Maybe Int64
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, cfSecret :: Maybe Text
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, cfMatFree :: Bool
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, cfRegFrom :: Maybe UTCTime
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, cfRegTo :: Maybe UTCTime
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, cfDeRegUntil :: Maybe UTCTime
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}
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instance Show CourseForm where
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show cf = T.unpack (cfShort cf) ++ ' ':(show $ cfCourseId cf)
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courseToForm :: Entity Course -> CourseForm
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courseToForm cEntity = CourseForm
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{ cfCourseId = Just $ entityKey cEntity
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, cfName = courseName course
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, cfDesc = courseDescription course
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, cfLink = courseLinkExternal course
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, cfShort = courseShorthand course
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, cfTerm = courseTerm course
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, cfSchool = courseSchool course
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, cfCapacity = courseCapacity course
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, cfSecret = courseRegisterSecret course
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, cfMatFree = courseMaterialFree course
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, cfRegFrom = courseRegisterFrom course
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, cfRegTo = courseRegisterTo course
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, cfDeRegUntil = courseDeregisterUntil course
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}
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where
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course = entityVal cEntity
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newCourseForm :: Maybe CourseForm -> Form CourseForm
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newCourseForm template = identForm FIDcourse $ \html -> do
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-- mopt hiddenField
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-- cidKey <- getsYesod appCryptoIDKey
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-- courseId <- runMaybeT $ do
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-- cid <- cfCourseId template
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-- UUID.encrypt cidKey cid
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(result, widget) <- flip (renderAForm FormStandard) html $ CourseForm
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-- <$> pure cid -- $ join $ cfCourseId <$> template -- why doesnt this work?
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<$> aopt hiddenField "KursId" (cfCourseId <$> template)
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<*> areq textField (fsb "Name") (cfName <$> template)
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<*> aopt htmlField (fsb "Beschreibung") (cfDesc <$> template)
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<*> aopt urlField (fsb "Homepage") (cfLink <$> template)
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<*> areq textField (fsb "Kürzel"
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-- & addAttr "disabled" "disabled"
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& setTooltip "Muss innerhalb des Semesters eindeutig sein")
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(cfShort <$> template)
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<*> areq termActiveField (fsb "Semester") (cfTerm <$> template)
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<*> areq schoolField (fsb "Institut") (cfSchool <$> template)
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<*> aopt (natField "Kapazität") (fsb "Kapazität") (cfCapacity <$> template)
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<*> aopt textField (fslpI MsgCourseSecret "beliebige Zeichenkette"
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& setTooltip "Optional: Anmeldung zum Kurs benötigt ein Passwort")
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(cfSecret <$> template)
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<*> areq checkBoxField (fslI MsgMaterialFree)(cfMatFree <$> template)
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<*> aopt utcTimeField (fslpI MsgRegisterFrom "Datum, sonst KEINE Anmeldung"
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& setTooltip "Ohne Datum ist keine Anmeldung zu diesem Kurs möglich!")
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(cfRegFrom <$> template)
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<*> aopt utcTimeField (fslpI MsgRegisterTo "Datum, sonst unbegr. Anmeldung"
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& setTooltip "Die Anmeldung darf ohne Begrenzung sein")
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(cfRegTo <$> template)
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<*> aopt utcTimeField (fslpI MsgDeRegUntil "Datum, sonst unbegr. Abmeldung"
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& setTooltip "Die Abmeldung darf ohne Begrenzung sein")
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(cfDeRegUntil <$> template)
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<* submitButton
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return $ case result of
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FormSuccess courseResult
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| errorMsgs <- validateCourse courseResult
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, not $ null errorMsgs ->
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(FormFailure errorMsgs,
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[whamlet|
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<div class="alert alert-danger">
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<div class="alert__content">
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<h4> Fehler:
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<ul>
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$forall errmsg <- errorMsgs
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<li> #{errmsg}
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^{widget}
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|]
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)
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_ -> (result, widget)
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-- where
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-- cid :: Maybe CourseId
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-- cid = join $ cfCourseId <$> template
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validateCourse :: CourseForm -> [Text]
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validateCourse (CourseForm{..}) =
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[ msg | (False, msg) <-
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[
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( NTop cfRegFrom <= NTop cfRegTo
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, "Ende des Anmeldezeitraums muss nach dem Anfang liegen"
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)
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,
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( NTop cfRegFrom <= NTop cfDeRegUntil
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, "Ende des Abmeldezeitraums muss nach dem Anfang liegen"
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)
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-- No starting date is okay: effective immediately
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-- ( cfHasReg <= (isNothing cfRegFrom)
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-- , "Beginn der Anmeldung angeben oder Anmeldungen deaktivieren"
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-- )
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-- ,
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] ]
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