eidolon/Handler/Commons.hs
2014-12-28 07:12:25 +01:00

62 lines
2.1 KiB
Haskell

module Handler.Commons where
import Import
import Yesod
import Data.String
loginIsAdmin :: IsString t => Handler (Either (t, Route App) ())
loginIsAdmin = do
msu <- lookupSession "userId"
case msu of
Just tempUserId -> do
userId <- return $ getUserIdFromText tempUserId
user <- runDB $ getJust userId
case userAdmin user of
True ->
return $ Right ()
False ->
return $ Left ("You have no admin rights", HomeR)
Nothing ->
return $ Left ("You are not logged in", LoginR)
profileCheck :: IsString t => UserId -> Handler (Either (t, Route App) User)
profileCheck userId = do
tempUser <- runDB $ get userId
case tempUser of
Just user -> do
msu <- lookupSession "userId"
case msu of
Just tempLoginId -> do
loginId <- return $ getUserIdFromText tempLoginId
case loginId == userId of
True ->
return $ Right user
False ->
return $ Left ("You can only change your own profile settings", UserR $ userName user)
Nothing ->
return $ Left ("You nedd to be logged in to change settings", LoginR)
Nothing ->
return $ Left ("This user does not exist", HomeR)
mediumCheck :: IsString t => MediumId -> Handler (Either (t, Route App) Medium)
mediumCheck mediumId = do
tempMedium <- runDB $ get mediumId
case tempMedium of
Just medium -> do
ownerId <- return $ mediumOwner medium
msu <- lookupSession "userId"
case msu of
Just tempUserId -> do
userId <- return $ getUserIdFromText tempUserId
album <- runDB $ getJust $ mediumAlbum medium
presence <- return (userId == ownerId)
albumOwnerPresence <- return (userId == (albumOwner album))
case presence || albumOwnerPresence of
True ->
return $ Right medium
False ->
return $ Left ("You must own this medium to change its settings", MediumR mediumId)
Nothing ->
return $ Left ("You must be logged in to change settings", LoginR)
Nothing ->
return $ Left ("This medium does not exist", HomeR)