From 22d4a4e583d8075fc71cddc22566f41fc5a698dc Mon Sep 17 00:00:00 2001
From: Eugen Wissner <belka@caraus.de>
Date: Sun, 7 Jul 2019 06:31:53 +0200
Subject: Change the main namespace to Language.GraphQL

---
 src/Language/GraphQL.hs | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 src/Language/GraphQL.hs

(limited to 'src/Language/GraphQL.hs')

diff --git a/src/Language/GraphQL.hs b/src/Language/GraphQL.hs
new file mode 100644
index 0000000..8ed29cf
--- /dev/null
+++ b/src/Language/GraphQL.hs
@@ -0,0 +1,36 @@
+-- | This module provides the functions to parse and execute @GraphQL@ queries.
+module Language.GraphQL where
+
+import Control.Monad (MonadPlus)
+
+import qualified Data.Text as T
+
+import qualified Data.Aeson as Aeson
+import Text.Megaparsec ( errorBundlePretty
+                       , parse
+                       )
+
+import Language.GraphQL.Execute
+import Language.GraphQL.Parser
+import Language.GraphQL.Schema
+
+import Language.GraphQL.Error
+
+-- | Takes a 'Schema' and text representing a @GraphQL@ request document.
+--   If the text parses correctly as a @GraphQL@ query the query is
+--   executed according to the given 'Schema'.
+--
+--   Returns the response as an @Aeson.@'Aeson.Value'.
+graphql :: MonadPlus m => Schema m -> T.Text -> m Aeson.Value
+graphql = flip graphqlSubs $ const Nothing
+
+-- | Takes a 'Schema', a variable substitution function and text
+--   representing a @GraphQL@ request document.  If the text parses
+--   correctly as a @GraphQL@ query the substitution is applied to the
+--   query and the query is then executed according to the given 'Schema'.
+--
+--   Returns the response as an @Aeson.@'Aeson.Value'.
+graphqlSubs :: MonadPlus m => Schema m -> Subs -> T.Text -> m Aeson.Value
+graphqlSubs schema f =
+    either (parseError . errorBundlePretty) (execute schema f)
+    . parse document ""
-- 
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