aeson-coerce (empty) → 0.1.0.0

raw patch · 4 files changed

+89/−0 lines, 4 filesdep +aesondep +basedep +bytestringsetup-changed

Dependencies added: aeson, base, bytestring, containers, text

Files

• LICENSE +30/−0
• Setup.hs +2/−0
• aeson-coerce.cabal +28/−0
• src/Data/Aeson/Coerce.hs +29/−0

@@ -0,0 +1,30 @@+Copyright Moritz Angermann (c) 2016++All rights reserved.++Redistribution and use in source and binary forms, with or without+modification, are permitted provided that the following conditions are met:++    * Redistributions of source code must retain the above copyright+      notice, this list of conditions and the following disclaimer.++    * Redistributions in binary form must reproduce the above+      copyright notice, this list of conditions and the following+      disclaimer in the documentation and/or other materials provided+      with the distribution.++    * Neither the name of Moritz Angermann nor the names of other+      contributors may be used to endorse or promote products derived+      from this software without specific prior written permission.++THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

@@ -0,0 +1,2 @@+import Distribution.Simple+main = defaultMain

@@ -0,0 +1,28 @@+name:                aeson-coerce+version:             0.1.0.0+synopsis:            Initial project template from stack+description:         Please see README.md+homepage:            https://github.com/lichtzwerge/aeson-coerce#readme+license:             BSD3+license-file:        LICENSE+author:              Moritz Angermann+maintainer:          moritz@lichtzwerge.de+copyright:           lichtzwerge GmbH+category:            Web+build-type:          Simple+-- extra-source-files:+cabal-version:       >=1.10++library+  hs-source-dirs:      src+  exposed-modules:     Data.Aeson.Coerce+  build-depends:       aeson+                     , base >= 4.7 && < 5+                     , bytestring+                     , containers+                     , text+  default-language:    Haskell2010++source-repository head+  type:     git+  location: https://github.com/lichtzwerge/aeson-coerce

@@ -0,0 +1,29 @@+module Data.Aeson.Coerce where++import Data.Aeson as Aeson (Value(..), FromJSON, fromJSON, eitherDecode, Result(..))+import Data.ByteString.Lazy (ByteString)+import Data.Text (pack, unpack)++type LazyByteString = ByteString++class Coercable a where+  -- I'd love to have+  -- coerc :: a -> a+  asString :: a -> a+  asNumber :: a -> a++instance Coercable Value where+  asString (Number n) = String (pack $ show n)+  asString (Bool b)   = String (pack $ show b)+  asString _          = error "No coercion"+  asNumber (String s) = Number (read $ unpack s)+  asNumber (Bool b)   = Number $ if b then 1 else 0+  asNumber _          = error "No coercion"++eitherDecode :: FromJSON a => (Value -> Value) -> LazyByteString -> Either String a+eitherDecode ops bs = do+  val <- Aeson.eitherDecode bs+  resultToEither . fromJSON $ ops val+  where resultToEither :: Result a -> Either String a+        resultToEither (Error e) = Left e+        resultToEither (Success s) = Right s