1 files changed, 76 insertions, 0 deletions
diff --git a/src/Reaktor/Config.hs b/src/Reaktor/Config.hs
new file mode 100644
index 0000000..8330be9
--- /dev/null
+++ b/src/Reaktor/Config.hs
@@ -0,0 +1,76 @@
+{-# LANGUAGE OverloadedStrings #-}
+module Reaktor.Config where
+
+import           Data.Aeson
+import qualified Data.HashMap.Lazy as HML
+import qualified Data.Text as T
+import qualified Reaktor.Plugins
+import           Reaktor.Types
+
+
+instance FromJSON Config where
+  parseJSON (Object v) = do
+      p <- v .:? "port" .!= defaultPort
+
+      Config
+        <$> v .: "hostname"
+        <*> pure p
+        <*> v .: "nick"
+        <*> v .:? "useTLS" .!= (p == tlsPort)
+        <*> v .:? "logTime" .!= True
+        <*> v .:? "plugins" .!= []
+  parseJSON _ = pure undefined
+
+
+data Config = Config {
+      hostname :: HostName,
+      port :: ServiceName,
+      nick :: Nickname,
+      useTLS :: Bool,
+      logTime :: Bool,
+      pluginInstances :: [PluginInstance]
+    }
+
+
+addPlugin :: T.Text -> IO Plugin -> Config -> Config
+addPlugin name p r =
+    r { pluginInstances = pluginInstances r <> [PluginInstance name (Left p)] }
+
+
+defaultPort :: ServiceName
+defaultPort = tlsPort
+
+tlsPort :: ServiceName
+tlsPort = "6697"
+
+
+data PluginInstance = PluginInstance {
+      pi_name :: T.Text,
+      pi_plugin :: Either (IO Plugin) Plugin
+    }
+
+instance FromJSON PluginInstance where
+  parseJSON o@(Object v) =
+      case HML.lookup "plugin" v of
+        Just (String name) -> do
+          let p = Reaktor.Plugins.get name
+              c = HML.lookupDefault (Object HML.empty) "config" v
+          pure $ PluginInstance name (Left $ p c)
+        Just _ -> error ("bad plugin object: " <> show o)
+        _ -> error ("mising 'plugin' attribute: " <> show o)
+  parseJSON x =
+      error ("bad plugin type: " <> show x)
+
+
+initPlugins :: Config -> IO Config
+initPlugins cfg = do
+    plugins' <- mapM initPlugin (pluginInstances cfg)
+    return cfg { pluginInstances = plugins' }
+  where
+    initPlugin :: PluginInstance -> IO PluginInstance
+    initPlugin i = do
+      p <-
+        case pi_plugin i of
+          Right p -> return p
+          Left f -> f
+      return i { pi_plugin = Right p }