Federation test outbox page with form for entering JSON

src/Data/Aeson/Encode/Pretty/ToEncoding.hs

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+{- This file is part of Vervis.
+ -
+ - Written in 2019 by fr33domlover <fr33domlover@riseup.net>.
+ -
+ - ♡ Copying is an act of love. Please copy, reuse and share.
+ -
+ - The author(s) have dedicated all copyright and related and neighboring
+ - rights to this software to the public domain worldwide. This software is
+ - distributed without any warranty.
+ -
+ - You should have received a copy of the CC0 Public Domain Dedication along
+ - with this software. If not, see
+ - <http://creativecommons.org/publicdomain/zero/1.0/>.
+ -}
+
+-- | A replacement for "Data.Aeson.Encode.Pretty" which uses 'toEncoding'
+-- instead of 'toJSON'.
+module Data.Aeson.Encode.Pretty.ToEncoding
+    ( encodePretty
+    , encodePrettyToLazyText
+    , encodePrettyToTextBuilder
+    )
+where
+
+import Prelude
+
+import Data.Aeson (ToJSON, Value, encode, decode)
+import Data.ByteString.Lazy (ByteString)
+import Data.Maybe (fromJust)
+import Data.Text.Lazy (Text)
+import Data.Text.Lazy.Builder (Builder, fromLazyText)
+import Data.Text.Lazy.Encoding (decodeUtf8)
+
+import qualified Data.Aeson.Encode.Pretty as P (encodePretty)
+
+encodePretty :: ToJSON a => a -> ByteString
+encodePretty = P.encodePretty . fromJust . decodeValue . encode
+    where
+    decodeValue :: ByteString -> Maybe Value
+    decodeValue = decode
+
+encodePrettyToLazyText :: ToJSON a => a -> Text
+encodePrettyToLazyText = decodeUtf8 . encodePretty
+
+encodePrettyToTextBuilder :: ToJSON a => a -> Builder
+encodePrettyToTextBuilder = fromLazyText . encodePrettyToLazyText