1 files changed, 36 insertions, 0 deletions
diff --git a/src/Language/GraphQL.hs b/src/Language/GraphQL.hs
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+++ b/src/Language/GraphQL.hs
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+-- | This module provides the functions to parse and execute @GraphQL@ queries.
+module Language.GraphQL
+    ( graphql
+    , graphqlSubs
+    ) where
+
+import Control.Monad.IO.Class (MonadIO)
+import qualified Data.Text as T
+
+import qualified Data.Aeson as Aeson
+import Text.Megaparsec (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 :: MonadIO 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 :: MonadIO m => Schema m -> Subs -> T.Text -> m Aeson.Value
+graphqlSubs schema f =
+    either parseError (execute schema f)
+    . parse document ""