fixing stuff and start adding authorization check

src/API.hs

@@ -72,7 +72,8 @@ type MateAPI = "v1" :> (
     :> Get '[JSON] [Role]
   :<|> "role" :> AuthProtect "header-auth" :> ReqBody '[JSON] RoleSubmit
     :> Post '[JSON] Int
-  :<|> "role" :> AuthProtect "header-auth" :> ReqBody '[JSON] Role
+  :<|> "role" :> AuthProtect "header-auth" :> Capture "rid" Int
+    :> ReqBody '[JSON] RoleSubmit
     :> Patch '[JSON] ()
   :<|> "role" :> AuthProtect "header-auth" :> ReqBody '[JSON] Int
     :> Delete '[JSON] ()
@@ -123,7 +124,7 @@ avatarListLink :: Link
 
 roleListLink :: Link
 roleNewLink :: Link
-roleUpdateLink :: Link
+roleUpdateLink :: Int -> Link
 roleDeleteLink :: Link
 roleAssociationListLink :: Link
 roleAssociationSubmitLink :: Link

src/Control/Role.hs

@@ -25,20 +25,36 @@ roleNew
   :: Maybe (Int, AuthMethod)
   -> RoleSubmit
   -> MateHandler Int
-roleNew (Just (_, auth)) (RoleSubmit name c1 c2 c3 c4 c5 c6 c7 c8 c9 c10 c11) =
+roleNew (Just (uid, auth)) (RoleSubmit name c1 c2 c3 c4 c5 c6 c7 c8 c9 c10 c11) =
+  do
+    isRoleManager <- checkCapability uid roleCanManageRoles
+    if (auth `elem` [PrimaryPass, ChallengeResponse] && isRoleManager)
+    then
       insertRole name c1 c2 c3 c4 c5 c6 c7 c8 c9 c10 c11 =<< asks rsConnection
-roleNew Nothing _ ->
+    else
+      throwError $ err401
+        { errBody = "You are not authorized for this action."
+        }
+roleNew Nothing _ =
   throwError $ err401
     { errBody = "No Authentication present."
     }
 
 roleUpdate
   :: Maybe (Int, AuthMethod)
-  -> Role
+  -> Int
+  -> RoleSubmit
   -> MateHandler ()
-roleUpdate Just (_, auth) role =
-  updateRole role =<< asks rsConnection
-roleUpdate Nothing _ ->
+roleUpdate (Just (uid, auth)) id_ roleSubmit = do
+  isRoleManager <- checkCapability uid roleCanManageRoles
+  if (auth `elem` [PrimaryPass, ChallengeResponse] && isRoleManager)
+  then
+    void $ updateRole id_ roleSubmit =<< asks rsConnection
+  else
+    throwError $ err401
+      { errBody = "You are not authorized for this action."
+      }
+roleUpdate Nothing _ _ =
   throwError $ err401
     { errBody = "No Authentication present."
     }
@@ -54,6 +70,19 @@ roleAssociationSubmit _ _ = notImplemented
 
 roleAssociationDelete _ _ = notImplemented
 
+-- | This is the internal function to check a users authorization to do certain
+-- actions
+checkCapability
+  :: Int              -- ^ User Id to check
+  -> (Role -> Bool)   -- ^ Predicate to check
+  -> MateHandler Bool -- ^ Result
+checkCapability uid accessRule = do
+  conn <- asks rsConnection
+  assocs <- selectUserAssociations uid conn
+  let rids = map roleAssociationRole assocs
+  roles <- selectRoleList rids conn
+  return $ any accessRule roles
+
 notImplemented :: MateHandler a
 notImplemented = throwError $ err501
   { errBody = "Function has not yet been implemented!"

src/Model/Role.hs

@@ -10,6 +10,8 @@ import Data.Profunctor.Product (p2, p13)
 
 import qualified Data.Text as T
 
+import Data.Int (Int64)
+
 import Opaleye as O hiding (null, not)
 import Opaleye.Constant as C
 
@@ -194,6 +196,38 @@ selectAllRoles conn = do
     rawRoles
 
 
+selectRoleList
+  :: [Int]
+  -> PGS.Connection
+  -> MateHandler [Role]
+selectRoleList ids conn = do
+  rawRoles <- liftIO $ runSelect conn (
+    (keepWhen (\(id_, _, _, _, _, _, _, _, _, _, _, _, _) ->
+      in_ (map C.constant ids) id_))
+      <<< queryTable roleTable
+    ) :: MateHandler
+        [
+          ( Int
+          , T.Text
+          , Bool
+          , Bool
+          , Bool
+          , Bool
+          , Bool
+          , Bool
+          , Bool
+          , Bool
+          , Bool
+          , Bool
+          , Bool
+          )
+        ]
+  return $ map
+    (\(id_, name, c1, c2, c3, c4, c5, c6, c7, c8, c9 ,c10, c11) ->
+      Role id_ name c1 c2 c3 c4 c5 c6 c7 c8 c9 c10 c11)
+    rawRoles
+
+
 insertRole
   :: T.Text
   -> Bool
@@ -319,6 +353,23 @@ selectAllRoleAssociations conn = do
     rawRoleAssocs
 
 
+selectUserAssociations
+  :: Int
+  -> PGS.Connection
+  -> MateHandler [RoleAssociation]
+selectUserAssociations uid conn = do
+  rawAssocs <- liftIO $ runSelect conn(
+    keepWhen (\(auid, _) -> auid .== C.constant uid)
+      <<< queryTable userToRoleTable
+    ) :: MateHandler
+      [
+        ( Int
+        , Int
+        )
+      ]
+  return $ map (\(auid, arid) -> RoleAssociation auid arid) rawAssocs
+
+
 associateUserToRole
   :: Int             -- ^ User id
   -> Int             -- ^ Role id
@@ -339,13 +390,14 @@ associateUserToRole uid rid conn =
 
 
 updateRole
-  :: Role -- The role with already updated info
+  :: Int        -- ID of the updated role
+  -> RoleSubmit -- The role with already updated info
   -> PGS.Connection
-  -> MateHandler ()
-updateRole role@(Role idnr name c1 c2 c3 c4 c5 c6 c7 c8 c9 c10 c11) conn =
+  -> MateHandler Int64
+updateRole rid role@(RoleSubmit name c1 c2 c3 c4 c5 c6 c7 c8 c9 c10 c11) conn =
   liftIO $ runUpdate_ conn $ Update
     { uTable      = roleTable
-    , uUpadteWith = updateEasy (\(id_, _, _, _, _, _, _, _, _, _, _, _, _) ->
+    , uUpdateWith = updateEasy (\(id_, _, _, _, _, _, _, _, _, _, _, _, _) ->
         ( id_
         , C.constant name
         , C.constant c1
@@ -361,7 +413,7 @@ updateRole role@(Role idnr name c1 c2 c3 c4 c5 c6 c7 c8 c9 c10 c11) conn =
         , C.constant c11
         )
       )
-    , uWhere      = \(id_, _, _, _, _, _, _, _, _, _, _, _, _) .>
-      id_ .== C.constant idnr
+    , uWhere      = \(id_, _, _, _, _, _, _, _, _, _, _, _, _) ->
+      id_ .== C.constant rid
     , uReturning = rCount
     }