5df8965488
* No more full URIs, all terms are used as short non-prefixed names * Some terms support parsing full URI form for compatibility with objects in DB * No more @context checking when parsing * Use the new ForgeFed context URI specified in the spec draft * Use an extension context URI for all custom properties not specific to forges * Rename "events" property to "history", thanks cjslep for suggesting this name
85 lines
2.1 KiB
Haskell
85 lines
2.1 KiB
Haskell
{- This file is part of Vervis.
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-
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- Written in 2019 by fr33domlover <fr33domlover@riseup.net>.
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-
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- ♡ Copying is an act of love. Please copy, reuse and share.
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-
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- The author(s) have dedicated all copyright and related and neighboring
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- rights to this software to the public domain worldwide. This software is
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- distributed without any warranty.
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-
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- You should have received a copy of the CC0 Public Domain Dedication along
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- with this software. If not, see
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- <http://creativecommons.org/publicdomain/zero/1.0/>.
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-}
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module Data.Aeson.Local
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( Either' (..)
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, toEither
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, fromEither
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, (.:|)
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, (.:|?)
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, (.=?)
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, (.=%)
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, WithValue (..)
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)
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where
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import Prelude
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import Control.Applicative
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import Data.Aeson
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import Data.Aeson.Types (Parser)
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import Data.Text (Text)
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import Network.URI
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import qualified Data.Text as T (unpack)
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data Either' a b = Left' a | Right' b
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instance (FromJSON a, FromJSON b) => FromJSON (Either' a b) where
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parseJSON v = Left' <$> parseJSON v <|> Right' <$> parseJSON v
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instance (ToJSON a, ToJSON b) => ToJSON (Either' a b) where
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toJSON = error "toJSON Either'"
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toEncoding (Left' x) = toEncoding x
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toEncoding (Right' y) = toEncoding y
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toEither :: Either' a b -> Either a b
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toEither (Left' x) = Left x
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toEither (Right' y) = Right y
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fromEither :: Either a b -> Either' a b
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fromEither (Left x) = Left' x
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fromEither (Right y) = Right' y
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(.:|) :: FromJSON a => Object -> Text -> Parser a
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o .:| t = o .: t <|> o .: (frg <> t)
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where
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frg = "https://forgefed.angeley.es/ns#"
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(.:|?) :: FromJSON a => Object -> Text -> Parser (Maybe a)
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o .:|? t = optional $ o .:| t
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infixr 8 .=?
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(.=?) :: ToJSON v => Text -> Maybe v -> Series
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_ .=? Nothing = mempty
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k .=? (Just v) = k .= v
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infixr 8 .=%
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(.=%) :: ToJSON v => Text -> [v] -> Series
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k .=% v =
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if null v
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then mempty
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else k .= v
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data WithValue a = WithValue
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{ wvRaw :: Object
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, wvParsed :: a
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}
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instance FromJSON a => FromJSON (WithValue a) where
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parseJSON v =
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flip WithValue
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<$> parseJSON v
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<*> withObject "WithValue" pure v
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