Updated transformers to 0.2.0
This commit is contained in:
Michael Snoyman
parent
6f88e0ff76
commit
3854af50f6
@ -27,7 +27,7 @@ import Data.Time (Day)
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import Data.Convertible.Text
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import Data.Attempt
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import Data.Maybe (fromMaybe)
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import "transformers" Control.Monad.Trans (MonadIO)
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import "transformers" Control.Monad.IO.Class (MonadIO)
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import qualified Safe.Failure
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noParamNameError :: String
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@ -42,7 +42,7 @@ import Web.Mime
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import Control.Exception hiding (Handler)
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import Control.Applicative
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import "transformers" Control.Monad.Trans
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import "transformers" Control.Monad.IO.Class
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import Control.Monad.Attempt
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import Control.Monad (liftM, ap)
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@ -47,7 +47,7 @@ import qualified Data.ByteString.Lazy as BL
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import Data.Convertible.Text
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import Control.Arrow ((***))
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import Data.Maybe (fromMaybe)
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import "transformers" Control.Monad.Trans
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import "transformers" Control.Monad.IO.Class
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import Control.Concurrent.MVar
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#if TEST
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@ -1,14 +1,3 @@
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{-# LANGUAGE MultiParamTypeClasses #-}
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{-# LANGUAGE TypeSynonymInstances #-}
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{-# LANGUAGE OverlappingInstances #-}
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{-# LANGUAGE GeneralizedNewtypeDeriving #-}
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{-# LANGUAGE CPP #-}
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{-# LANGUAGE StandaloneDeriving #-}
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{-# LANGUAGE DeriveDataTypeable #-}
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{-# LANGUAGE FlexibleContexts #-}
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{-# LANGUAGE FlexibleInstances #-}
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{-# LANGUAGE TemplateHaskell #-}
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{-# LANGUAGE QuasiQuotes #-}
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---------------------------------------------------------
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--
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-- Module : Yesod.Resource
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@ -23,509 +12,5 @@
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--
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---------------------------------------------------------
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module Yesod.Resource
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( mkResources
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, mkResourcesNoCheck
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#if TEST
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-- * Testing
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, testSuite
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#endif
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(
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) where
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import Data.List.Split (splitOn)
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import Yesod.Definitions
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import Data.List (nub)
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import Data.Char (isDigit)
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import Language.Haskell.TH.Syntax
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import Language.Haskell.TH.Quote
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import Network.Wai (Method (..), methodFromBS, methodToBS)
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{- Debugging
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import Language.Haskell.TH.Ppr
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import System.IO
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-}
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import Data.Typeable
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import Control.Exception (Exception)
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import Data.Attempt -- for failure stuff
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import Data.Object.Text
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import Control.Monad ((<=<), unless, zipWithM)
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import Data.Object.Yaml
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import Yesod.Handler
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import Data.Maybe (fromJust)
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import Yesod.Response (chooseRep)
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import Control.Arrow
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import Data.ByteString (ByteString)
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#if TEST
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import Control.Monad (replicateM)
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import Test.Framework (testGroup, Test)
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import Test.Framework.Providers.HUnit
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import Test.Framework.Providers.QuickCheck2 (testProperty)
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import Test.HUnit hiding (Test)
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import Test.QuickCheck
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import Control.Monad (when)
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#endif
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mkResources :: QuasiQuoter
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mkResources = QuasiQuoter (strToExp True) undefined
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mkResourcesNoCheck :: QuasiQuoter
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mkResourcesNoCheck = QuasiQuoter (strToExp False) undefined
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-- | Resource Pattern Piece
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data RPP =
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Static String
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| DynStr String
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| DynInt String
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| Slurp String -- ^ take up the rest of the pieces. must be last
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deriving (Eq, Show)
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-- | Resource Pattern
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newtype RP = RP { unRP :: [RPP] }
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deriving (Eq, Show)
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isSlurp :: RPP -> Bool
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isSlurp (Slurp _) = True
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isSlurp _ = False
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data InvalidResourcePattern =
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SlurpNotLast String
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| EmptyResourcePatternPiece String
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deriving (Show, Typeable)
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instance Exception InvalidResourcePattern
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readRP :: MonadFailure InvalidResourcePattern m
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=> ResourcePattern
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-> m RP
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readRP "" = return $ RP []
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readRP "/" = return $ RP []
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readRP rps = fmap RP $ helper $ splitOn "/" $ correct rps where
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correct = correct1 . correct2 where
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correct1 ('/':rest) = rest
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correct1 x = x
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correct2 x
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| null x = x
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| last x == '/' = init x
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| otherwise = x
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helper [] = return []
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helper (('$':name):rest) = do
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rest' <- helper rest
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return $ DynStr name : rest'
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helper (('#':name):rest) = do
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rest' <- helper rest
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return $ DynInt name : rest'
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helper (('*':name):rest) = do
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rest' <- helper rest
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unless (null rest') $ failure $ SlurpNotLast rps
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return $ Slurp name : rest'
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helper ("":_) = failure $ EmptyResourcePatternPiece rps
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helper (name:rest) = do
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rest' <- helper rest
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return $ Static name : rest'
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instance ConvertSuccess RP String where
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convertSuccess = concatMap helper . unRP where
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helper (Static s) = '/' : s
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helper (DynStr s) = '/' : '$' : s
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helper (Slurp s) = '/' : '*' : s
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helper (DynInt s) = '/' : '#' : s
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type ResourcePattern = String
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-- | Determing whether the given resource fits the resource pattern.
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doesPatternMatch :: RP -> Resource -> Bool
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doesPatternMatch rp r = case doPatternPiecesMatch (unRP rp) r of
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Nothing -> False
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_ -> True
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-- | Extra the 'UrlParam's from a resource known to match the given 'RP'. This
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-- is a partial function.
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paramsFromMatchingPattern :: RP -> Resource -> [UrlParam]
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paramsFromMatchingPattern rp =
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map snd . fromJust . doPatternPiecesMatch (unRP rp)
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doPatternPiecesMatch :: MonadFailure NoMatch m
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=> [RPP]
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-> Resource
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-> m [(String, UrlParam)]
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doPatternPiecesMatch rp r
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| not (null rp) && isSlurp (last rp) = do
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let rp' = init rp
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(r1, r2) = splitAt (length rp') r
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smap <- doPatternPiecesMatch rp' r1
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let Slurp slurpKey = last rp
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return $ (slurpKey, SlurpParam r2) : smap
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| length rp /= length r = failure NoMatch
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| otherwise = concat `fmap` zipWithM doesPatternPieceMatch rp r
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data NoMatch = NoMatch
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doesPatternPieceMatch :: MonadFailure NoMatch m
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=> RPP
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-> String
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-> m [(String, UrlParam)]
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doesPatternPieceMatch (Static x) y = if x == y then return [] else failure NoMatch
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doesPatternPieceMatch (DynStr x) y = return [(x, StringParam y)]
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doesPatternPieceMatch (Slurp x) _ = error $ "Slurp pattern " ++ x ++ " must be last"
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doesPatternPieceMatch (DynInt x) y
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| all isDigit y = return [(x, IntParam $ read y)]
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| otherwise = failure NoMatch
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-- | Determine if two resource patterns can lead to an overlap (ie, they can
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-- both match a single resource).
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overlaps :: [RPP] -> [RPP] -> Bool
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overlaps [] [] = True
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overlaps [] _ = False
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overlaps _ [] = False
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overlaps (Slurp _:_) _ = True
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overlaps _ (Slurp _:_) = True
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overlaps (DynStr _:x) (_:y) = overlaps x y
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overlaps (_:x) (DynStr _:y) = overlaps x y
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overlaps (DynInt _:x) (DynInt _:y) = overlaps x y
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overlaps (DynInt _:x) (Static s:y)
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| all isDigit s = overlaps x y
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| otherwise = False
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overlaps (Static s:x) (DynInt _:y)
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| all isDigit s = overlaps x y
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| otherwise = False
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overlaps (Static a:x) (Static b:y) = a == b && overlaps x y
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data OverlappingPatterns =
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OverlappingPatterns [(ResourcePattern, ResourcePattern)]
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deriving (Show, Typeable, Eq)
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instance Exception OverlappingPatterns
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getAllPairs :: [x] -> [(x, x)]
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getAllPairs [] = []
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getAllPairs [_] = []
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getAllPairs (x:xs) = map ((,) x) xs ++ getAllPairs xs
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-- | Ensures that we have a consistent set of resource patterns.
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checkPatterns :: (MonadFailure OverlappingPatterns m,
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MonadFailure InvalidResourcePattern m)
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=> [ResourcePattern]
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-> m [RP]
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checkPatterns rpss = do
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rps <- mapM (runKleisli $ Kleisli return &&& Kleisli readRP) rpss
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let overlaps' = concatMap helper $ getAllPairs rps
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unless (null overlaps') $ failure $ OverlappingPatterns overlaps'
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return $ map snd rps
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where
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helper :: ((ResourcePattern, RP), (ResourcePattern, RP))
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-> [(ResourcePattern, ResourcePattern)]
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helper ((a, RP x), (b, RP y))
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| overlaps x y = [(a, b)]
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| otherwise = []
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data RPNode = RPNode RP MethodMap
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deriving (Show, Eq)
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data MethodMap = AllMethods String | Methods [(Method, String)]
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deriving (Show, Eq)
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instance ConvertAttempt TextObject [RPNode] where
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convertAttempt = mapM helper <=< fromMapping where
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helper :: (Text, TextObject) -> Attempt RPNode
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helper (rp, rest) = do
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verbMap <- fromTextObject rest
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rp' <- readRP $ cs rp
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return $ RPNode rp' verbMap
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instance ConvertAttempt TextObject MethodMap where
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convertAttempt (Scalar s) = return $ AllMethods $ cs s
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convertAttempt (Mapping m) = Methods `fmap` mapM helper m where
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helper :: (Text, TextObject) -> Attempt (Method, String)
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helper (v, Scalar f) = return (methodFromBS $ cs v, cs f)
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helper (_, x) = failure $ MethodMapNonScalar x
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convertAttempt o = failure $ MethodMapSequence o
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data RPNodeException = MethodMapNonScalar TextObject
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| MethodMapSequence TextObject
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deriving (Show, Typeable)
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instance Exception RPNodeException
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checkRPNodes :: (MonadFailure OverlappingPatterns m,
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MonadFailure RepeatedMethod m,
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MonadFailure InvalidResourcePattern m
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)
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=> [RPNode]
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-> m [RPNode]
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checkRPNodes nodes = do
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_ <- checkPatterns $ map (\(RPNode r _) -> cs r) nodes
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mapM_ (\(RPNode _ v) -> checkMethodMap v) nodes
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return nodes
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where
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checkMethodMap (AllMethods _) = return ()
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checkMethodMap (Methods vs) =
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let vs' = map fst vs
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res = nub vs' == vs'
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in unless res $ failure $ RepeatedMethod vs
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newtype RepeatedMethod = RepeatedMethod [(Method, String)]
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deriving (Show, Typeable)
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instance Exception RepeatedMethod
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rpnodesTHCheck :: [RPNode] -> Q Exp
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rpnodesTHCheck nodes = do
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nodes' <- runIO $ checkRPNodes nodes
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{- For debugging purposes
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rpnodesTH nodes' >>= runIO . putStrLn . pprint
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runIO $ hFlush stdout
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-}
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rpnodesTH nodes'
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notFoundMethod :: Method -> Handler yesod a
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notFoundMethod _verb = notFound
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rpnodesTH :: [RPNode] -> Q Exp
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rpnodesTH ns = do
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b <- mapM helper ns
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nfv <- [|notFoundMethod|]
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ow <- [|otherwise|]
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let b' = b ++ [(NormalG ow, nfv)]
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return $ LamE [VarP $ mkName "resource"]
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$ CaseE (TupE []) [Match WildP (GuardedB b') []]
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where
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helper :: RPNode -> Q (Guard, Exp)
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helper (RPNode rp vm) = do
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rp' <- lift rp
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cpb <- [|doesPatternMatch|]
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let r' = VarE $ mkName "resource"
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let g = cpb `AppE` rp' `AppE` r'
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vm' <- liftMethodMap vm r' rp
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let vm'' = LamE [VarP $ mkName "verb"] vm'
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return (NormalG g, vm'')
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data UrlParam = SlurpParam { slurpParam :: [String] }
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| StringParam { stringParam :: String }
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| IntParam { intParam :: Integer }
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getUrlParam :: RP -> Resource -> Int -> UrlParam
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getUrlParam rp = (!!) . paramsFromMatchingPattern rp
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getUrlParamSlurp :: RP -> Resource -> Int -> [String]
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getUrlParamSlurp rp r = slurpParam . getUrlParam rp r
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getUrlParamString :: RP -> Resource -> Int -> String
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getUrlParamString rp r = stringParam . getUrlParam rp r
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getUrlParamInt :: RP -> Resource -> Int -> Integer
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getUrlParamInt rp r = intParam . getUrlParam rp r
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applyUrlParams :: RP -> Exp -> Exp -> Q Exp
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applyUrlParams rp@(RP rpps) r f = do
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getFs <- helper 0 rpps
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return $ foldl AppE f getFs
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where
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helper :: Int -> [RPP] -> Q [Exp]
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helper _ [] = return []
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helper i (Static _:rest) = helper i rest
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helper i (DynStr _:rest) = do
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rp' <- lift rp
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str <- [|getUrlParamString|]
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i' <- lift i
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rest' <- helper (i + 1) rest
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return $ str `AppE` rp' `AppE` r `AppE` i' : rest'
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helper i (DynInt _:rest) = do
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rp' <- lift rp
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int <- [|getUrlParamInt|]
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i' <- lift i
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rest' <- helper (i + 1) rest
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return $ int `AppE` rp' `AppE` r `AppE` i' : rest'
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helper i (Slurp _:rest) = do
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rp' <- lift rp
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slurp <- [|getUrlParamSlurp|]
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i' <- lift i
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rest' <- helper (i + 1) rest
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return $ slurp `AppE` rp' `AppE` r `AppE` i' : rest'
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instance Lift RP where
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lift (RP rpps) = do
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rpps' <- lift rpps
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rp <- [|RP|]
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return $ rp `AppE` rpps'
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instance Lift RPP where
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lift (Static s) = do
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st <- [|Static|]
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return $ st `AppE` (LitE $ StringL s)
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lift (DynStr s) = do
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d <- [|DynStr|]
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return $ d `AppE` (LitE $ StringL s)
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lift (DynInt s) = do
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d <- [|DynInt|]
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return $ d `AppE` (LitE $ StringL s)
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lift (Slurp s) = do
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sl <- [|Slurp|]
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return $ sl `AppE` (LitE $ StringL s)
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liftMethodMap :: MethodMap -> Exp -> RP -> Q Exp
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liftMethodMap (AllMethods s) r rp = do
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-- handler function
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let f = VarE $ mkName s
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-- applied to the verb
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let f' = f `AppE` VarE (mkName "verb")
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-- apply all the url params
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f'' <- applyUrlParams rp r f'
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-- and apply chooseRep
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cr <- [|fmap chooseRep|]
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let f''' = cr `AppE` f''
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return f'''
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liftMethodMap (Methods vs) r rp = do
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cr <- [|fmap chooseRep|]
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vs' <- mapM (helper cr) vs
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return $ CaseE (TupE []) [Match WildP (GuardedB $ vs' ++ [whenNotFound]) []]
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--return $ CaseE (VarE $ mkName "verb") $ vs' ++ [whenNotFound]
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where
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helper :: Exp -> (Method, String) -> Q (Guard, Exp)
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helper cr (v, fName) = do
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method' <- liftMethod v
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equals <- [|(==)|]
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let eq = equals
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`AppE` method'
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`AppE` VarE ((mkName "verb"))
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let g = NormalG $ eq
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let f = VarE $ mkName fName
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f' <- applyUrlParams rp r f
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let f'' = cr `AppE` f'
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return (g, f'')
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whenNotFound :: (Guard, Exp)
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whenNotFound =
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(NormalG $ ConE $ mkName "True",
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VarE $ mkName "notFound")
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liftMethod :: Method -> Q Exp
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liftMethod m = do
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cs' <- [|cs :: String -> ByteString|]
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methodFromBS' <- [|methodFromBS|]
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let s = LitE $ StringL $ cs $ methodToBS m
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return $ methodFromBS' `AppE` AppE cs' s
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strToExp :: Bool -> String -> Q Exp
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strToExp toCheck s = do
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rpnodes <- runIO $ decode (cs s) >>= \to -> convertAttemptWrap (to :: TextObject)
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(if toCheck then rpnodesTHCheck else rpnodesTH) rpnodes
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#if TEST
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---- Testing
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testSuite :: Test
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testSuite = testGroup "Yesod.Resource"
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[ testCase "non-overlap" caseOverlap1
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, testCase "overlap" caseOverlap2
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, testCase "overlap-slurp" caseOverlap3
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, testCase "checkPatterns" caseCheckPatterns
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, testProperty "show pattern" prop_showPattern
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, testCase "integers" caseIntegers
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, testCase "read patterns from YAML" caseFromYaml
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, testCase "checkRPNodes" caseCheckRPNodes
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, testCase "readRP" caseReadRP
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]
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instance Arbitrary RP where
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arbitrary = do
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size <- elements [1..10]
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rpps <- replicateM size arbitrary
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let rpps' = filter (not . isSlurp) rpps
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extra <- arbitrary
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return $ RP $ rpps' ++ [extra]
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caseOverlap' :: String -> String -> Bool -> Assertion
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caseOverlap' x y b = do
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x' <- readRP x
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y' <- readRP y
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assert $ overlaps (unRP x') (unRP y') == b
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caseOverlap1 :: Assertion
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caseOverlap1 = caseOverlap' "/foo/$bar/" "/foo/baz/$bin" False
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caseOverlap2 :: Assertion
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caseOverlap2 = caseOverlap' "/foo/bar" "/foo/$baz" True
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caseOverlap3 :: Assertion
|
||||
caseOverlap3 = caseOverlap' "/foo/bar/baz/$bin" "*slurp" True
|
||||
|
||||
caseCheckPatterns :: Assertion
|
||||
caseCheckPatterns = do
|
||||
let res = checkPatterns [p1, p2, p3, p4, p5]
|
||||
attempt helper (fail "Did not fail") res
|
||||
where
|
||||
p1 = cs "/foo/bar/baz"
|
||||
p2 = cs "/foo/$bar/baz"
|
||||
p3 = cs "/bin"
|
||||
p4 = cs "/bin/boo"
|
||||
p5 = cs "/bin/*slurp"
|
||||
expected = OverlappingPatterns
|
||||
[ (p1, p2)
|
||||
, (p4, p5)
|
||||
]
|
||||
helper e = case cast e of
|
||||
Nothing -> fail "Wrong exception"
|
||||
Just op -> do
|
||||
expected @=? op
|
||||
|
||||
prop_showPattern :: RP -> Bool
|
||||
prop_showPattern p = readRP (cs p) == Just p
|
||||
|
||||
caseIntegers :: Assertion
|
||||
caseIntegers = do
|
||||
let p1 = "/foo/#bar/"
|
||||
p2 = "/foo/#baz/"
|
||||
p3 = "/foo/$bin/"
|
||||
p4 = "/foo/4/"
|
||||
p5 = "/foo/bar/"
|
||||
p6 = "/foo/*slurp/"
|
||||
checkOverlap :: String -> String -> Bool -> IO ()
|
||||
checkOverlap a b c = do
|
||||
rpa <- readRP a
|
||||
rpb <- readRP b
|
||||
let res1 = overlaps (unRP rpa) (unRP $ rpb)
|
||||
let res2 = overlaps (unRP rpb) (unRP $ rpa)
|
||||
when (res1 /= c || res2 /= c) $ assertString $ a
|
||||
++ (if c then " does not overlap with " else " overlaps with ")
|
||||
++ b
|
||||
checkOverlap p1 p2 True
|
||||
checkOverlap p1 p3 True
|
||||
checkOverlap p1 p4 True
|
||||
checkOverlap p1 p5 False
|
||||
checkOverlap p1 p6 True
|
||||
|
||||
instance Arbitrary RPP where
|
||||
arbitrary = do
|
||||
constr <- elements [Static, DynStr, Slurp, DynInt]
|
||||
size <- elements [1..10]
|
||||
s <- replicateM size $ elements ['a'..'z']
|
||||
return $ constr s
|
||||
|
||||
caseFromYaml :: Assertion
|
||||
caseFromYaml = do
|
||||
rp1 <- readRP "static/*filepath"
|
||||
rp2 <- readRP "page"
|
||||
rp3 <- readRP "page/$page"
|
||||
rp4 <- readRP "user/#id"
|
||||
let expected =
|
||||
[ RPNode rp1 $ AllMethods "getStatic"
|
||||
, RPNode rp2 $ Methods [(GET, "pageIndex"), (PUT, "pageAdd")]
|
||||
, RPNode rp3 $ Methods [ (GET, "pageDetail")
|
||||
, (DELETE, "pageDelete")
|
||||
, (POST, "pageUpdate")
|
||||
]
|
||||
, RPNode rp4 $ Methods [(GET, "userInfo")]
|
||||
]
|
||||
contents' <- decodeFile "Test/resource-patterns.yaml"
|
||||
contents <- convertAttemptWrap (contents' :: TextObject)
|
||||
expected @=? contents
|
||||
|
||||
caseCheckRPNodes :: Assertion
|
||||
caseCheckRPNodes = do
|
||||
good' <- decodeFile "Test/resource-patterns.yaml"
|
||||
good <- convertAttemptWrap (good' :: TextObject)
|
||||
Just good @=? checkRPNodes good
|
||||
rp1 <- readRP "foo/bar"
|
||||
rp2 <- readRP "$foo/bar"
|
||||
let bad1 = [ RPNode rp1 $ AllMethods "foo"
|
||||
, RPNode rp2 $ AllMethods "bar"
|
||||
]
|
||||
Nothing @=? checkRPNodes bad1
|
||||
rp' <- readRP ""
|
||||
let bad2 = [RPNode rp' $ Methods [(GET, "foo"), (GET, "bar")]]
|
||||
Nothing @=? checkRPNodes bad2
|
||||
|
||||
caseReadRP :: Assertion
|
||||
caseReadRP = do
|
||||
Just (RP [Static "foo", DynStr "bar", DynInt "baz", Slurp "bin"]) @=?
|
||||
readRP "foo/$bar/#baz/*bin/"
|
||||
Just (RP [Static "foo", DynStr "bar", DynInt "baz", Slurp "bin"]) @=?
|
||||
readRP "foo/$bar/#baz/*bin"
|
||||
Nothing @=? readRP "/foo//"
|
||||
Just (RP []) @=? readRP "/"
|
||||
Nothing @=? readRP "/*slurp/anything"
|
||||
#endif
|
||||
|
||||
@ -1,5 +1,5 @@
|
||||
name: yesod
|
||||
version: 0.0.0.1
|
||||
version: 0.2.0
|
||||
license: BSD3
|
||||
license-file: LICENSE
|
||||
author: Michael Snoyman <michael@snoyman.com>
|
||||
@ -42,15 +42,14 @@ library
|
||||
wai >= 0.0.0 && < 0.1,
|
||||
wai-extra >= 0.0.0 && < 0.1,
|
||||
split >= 0.1.1 && < 0.2,
|
||||
authenticate >= 0.4.0 && < 0.5,
|
||||
authenticate >= 0.6 && < 0.7,
|
||||
predicates >= 0.1 && < 0.2,
|
||||
bytestring >= 0.9.1.4 && < 0.10,
|
||||
web-encodings >= 0.2.4 && < 0.3,
|
||||
data-object >= 0.2.0 && < 0.3,
|
||||
data-object-yaml >= 0.2.0 && < 0.3,
|
||||
directory >= 1 && < 1.1,
|
||||
transformers >= 0.1.4.0 && < 0.2,
|
||||
control-monad-attempt >= 0.0.0 && < 0.1,
|
||||
transformers >= 0.2.0 && < 0.3,
|
||||
control-monad-attempt >= 0.2.0 && < 0.3,
|
||||
syb,
|
||||
text >= 0.5 && < 0.8,
|
||||
convertible-text >= 0.2.0 && < 0.3,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user