329 lines
14 KiB
Haskell
329 lines
14 KiB
Haskell
{-# LANGUAGE RecordWildCards #-}
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{-# LANGUAGE NoImplicitPrelude #-}
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{-# LANGUAGE OverloadedStrings #-}
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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 Colonnade hiding (fromMaybe)
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import Yesod.Colonnade
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import qualified Data.UUID.Cryptographic as UUID
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getCourseListR :: Handler TypedContent
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getCourseListR = redirect TermShowR
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getCourseListTermR :: TermId -> Handler Html
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getCourseListTermR tidini = do
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(term,courses) <- runDB $ (,)
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<$> get tidini
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<*> selectList [CourseTermId ==. tidini] [Asc CourseShorthand]
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when (isNothing term) $ do
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addMessage "warning" [shamlet| Semester #{toPathPiece tidini} nicht gefunden. |]
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redirect TermShowR
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-- TODO: several runDBs per TableRow are probably too inefficient!
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let colonnadeTerms = mconcat
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[ headed "Kürzel" $ (\ckv ->
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let c = entityVal ckv
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shd = courseShorthand c
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tid = courseTermId c
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in [whamlet| <a href=@{CourseShowR tid shd}>#{shd} |] )
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-- , headed "Institut" $ [shamlet| #{course} |]
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, headed "Beginn Anmeldung" $ fromString.(maybe "" formatTimeGerWD).courseRegisterFrom.entityVal
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, headed "Ende Anmeldung" $ fromString.(maybe "" formatTimeGerWD).courseRegisterTo.entityVal
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, headed "Teilnehmer" $ (\ckv -> do
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let cid = entityKey ckv
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partiNum <- handlerToWidget $ runDB $ count [CourseParticipantCourseId ==. cid]
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[whamlet| #{show partiNum} |]
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)
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, headed " " $ (\ckv ->
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let c = entityVal ckv
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shd = courseShorthand c
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tid = courseTermId c
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in do
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adminLink <- handlerToWidget $ isAuthorized (CourseEditExistR tid shd ) False
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-- if (adminLink==Authorized) then linkButton "Ändern" BCWarning (CourseEditExistR tid shd) else ""
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[whamlet|
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$if adminLink == Authorized
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<a href=@{CourseEditExistR tid shd}>
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editieren
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|]
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)
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]
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let pageLinks =
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[ NavbarLeft $ MenuItem
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{ menuItemLabel = "Neuer Kurs"
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, menuItemRoute = CourseEditR
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, menuItemAccessCallback = (== Authorized) <$> isAuthorized CourseEditR False
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}
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]
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defaultLinkLayout pageLinks $ do
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-- defaultLayout $ do
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setTitle "Semesterkurse"
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linkButton "Neuen Kurs anlegen" BCPrimary CourseEditR
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encodeHeadedWidgetTable tableDefault colonnadeTerms courses -- (map entityVal courses)
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getCourseShowR :: TermId -> Text -> Handler Html
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getCourseShowR tid csh = do
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mbAid <- maybeAuthId
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(courseEnt,(schoolMB,participants,mbRegistered)) <- runDB $ do
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courseEnt@(Entity cid course) <- getBy404 $ CourseTermShort tid csh
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dependent <- (,,)
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<$> get (courseSchoolId course) -- join
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<*> count [CourseParticipantCourseId ==. 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 (UniqueCourseParticipant cid aid)
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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" $ registerButton $ mbRegistered
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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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registerButton :: Bool -> Form ()
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registerButton registered = renderAForm FormStandard $
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pure () <* bootstrapSubmit regMsg
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where
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msg = if registered then "Abmelden" else "Anmelden"
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regMsg = msg :: BootstrapSubmit Text
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postCourseShowR :: TermId -> Text -> Handler Html
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postCourseShowR tid csh = do
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aid <- requireAuthId
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(cid, registered) <- runDB $ do
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(Entity cid _) <- getBy404 $ CourseTermShort tid csh
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registered <- isJust <$> (getBy $ UniqueCourseParticipant cid aid)
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return (cid, registered)
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((regResult,_), _) <- runFormPost $ identifyForm "registerBtn" $ registerButton registered
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case regResult of
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(FormSuccess _)
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| registered -> do
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runDB $ deleteBy $ UniqueCourseParticipant cid aid
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addMessage "info" "Sie wurden abgemeldet."
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| otherwise -> 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) $ addMessage "success" "Erfolgreich angemeldet!"
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(_other) -> return () -- TODO check this!
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-- redirect or not?! I guess not, since we want GET now
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getCourseShowR tid csh
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getCourseEditR :: Handler Html
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getCourseEditR = do
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-- TODO: Defaults für Semester hier ermitteln und übergeben
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courseEditHandler Nothing
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postCourseEditR :: Handler Html
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postCourseEditR = courseEditHandler Nothing
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getCourseEditExistR :: TermId -> Text -> Handler Html
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getCourseEditExistR tid csh = do
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course <- runDB $ getBy $ CourseTermShort tid csh
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courseEditHandler course
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getCourseEditExistIDR :: CryptoUUIDCourse -> Handler Html
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getCourseEditExistIDR cID = do
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cIDKey <- getsYesod appCryptoIDKey
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courseID <- UUID.decrypt cIDKey cID
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courseEditHandler =<< runDB (getEntity courseID)
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courseEditHandler :: Maybe (Entity Course) -> Handler Html
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courseEditHandler course = do
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aid <- requireAuthId
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((result, formWidget), formEnctype) <- runFormPost $ newCourseForm $ courseToForm <$> course
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action <- lookupPostParam "formaction"
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case (result,action) of
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(FormSuccess res, fAct)
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| fAct == formActionDelete
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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 $ CourseListTermR $ cfTerm res
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| fAct == formActionSave
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, Just cid <- cfCourseId res -> do
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let tid = cfTerm res
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actTime <- liftIO getCurrentTime
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updateokay <- runDB $ do
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exists <- getBy $ CourseTermShort tid $ cfShort res
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let upokay = isNothing exists
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when upokay $ update cid
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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 -- TODO: change here should generate a warning, or only allowed for Admins?!
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, CourseTermId =. tid -- TODO: change here should generate a warning, or only allowed for Admins?!
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, CourseSchoolId =. cfSchool res
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, CourseCapacity =. cfCapacity res
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, CourseRegisterFrom =. cfRegFrom res
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, CourseRegisterTo =. cfRegTo res
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, CourseChangedBy =. aid
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, CourseChanged =. actTime
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]
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return upokay
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let cti = toPathPiece $ cfTerm res
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if updateokay
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then do
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addMessage "info" [shamlet| Kurs #{cti}/#{cfShort res} wurde geändert. |]
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redirect $ CourseListTermR $ cfTerm res
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else do
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addMessage "danger" [shamlet| Kurs #{cti}/#{cfShort res} konnte nicht geändert werden.
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\ Es gibt bereits einen anderen Kurs mit diesem Kürzel in diesem Semester.|]
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| fAct == formActionSave
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, Nothing <- cfCourseId res -> do
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actTime <- 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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, courseTermId = cfTerm res
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, courseSchoolId = cfSchool res
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, courseCapacity = cfCapacity res
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, courseHasRegistration = cfHasReg res
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, courseRegisterFrom = cfRegFrom res
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, courseRegisterTo = cfRegTo res
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, courseCreated = actTime
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, courseChanged = actTime
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, courseCreatedBy = aid
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, courseChangedBy = aid
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}
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case insertOkay of
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(Just cid) -> do
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runDB $ insert_ $ Lecturer aid cid
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let cti = toPathPiece $ cfTerm res
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addMessage "info" [shamlet|Kurs #{cti}/#{cfShort res} wurde angelegt.|]
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redirect $ CourseListTermR $ cfTerm res
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Nothing -> do
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let cti = toPathPiece $ cfTerm res
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addMessage "danger" [shamlet|Es gibt bereits einen Kurs #{cfShort res} in Semester #{cti}.|]
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(FormFailure _,_) -> addMessage "warning" "Bitte Eingabe korrigieren."
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_other -> return ()
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let formTitle = "Kurs editieren/anlegen" :: Text
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let actionUrl = CourseEditR
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let formActions = defaultFormActions
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defaultLayout $ do
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setTitle [shamlet| #{formTitle} |]
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$(widgetFile "generic_form")
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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 Int
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, cfHasReg :: Bool
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, cfRegFrom :: Maybe UTCTime
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, cfRegTo :: 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 = courseTermId course
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, cfSchool = courseSchoolId course
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, cfCapacity = courseCapacity course
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, cfHasReg = courseHasRegistration course
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, cfRegFrom = courseRegisterFrom course
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, cfRegTo = courseRegisterTo 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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<*> areq checkBoxField (fsb "Anmeldung") (cfHasReg <$> template)
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<*> aopt utcTimeField (fsb "Anmeldung von:") (cfRegFrom <$> template)
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<*> aopt utcTimeField (fsb "Anmeldung bis:") (cfRegTo <$> template)
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-- <* bootstrapSubmit (bsSubmit (show cid))
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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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<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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( cfRegFrom <= 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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-- 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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( cfHasReg == (isJust cfRegTo)
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, "Ende des Anmeldezeitraums angeben oder Anmeldungen deaktivieren"
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)
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,
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( isJust cfRegFrom <= cfHasReg
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, "Anmeldungen aktivieren oder Anmeldezeitraum löschen"
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)
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] ]
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