Allow "TBA" laps in TSN.XML.AutoRacingSchedule.

[dead/htsn-import.git] / src / OptionalConfiguration.hs

diff --git a/src/OptionalConfiguration.hs b/src/OptionalConfiguration.hs
index f44f77a43396e80fc313cb66fb765ff1fd00c731..49355f2de743dfcdbc887606df408488ba73e60a 100644 (file)
--- a/src/OptionalConfiguration.hs
+++ b/src/OptionalConfiguration.hs
@@ -15,6 +15,7 @@ module OptionalConfiguration (
   merge_maybes )
 where
 
+-- System imports.
 import qualified Data.Configurator as DC (
   Worth(Optional),
   load,
@@ -31,9 +32,12 @@ import System.Directory ( getHomeDirectory )
 import System.FilePath ( (</>) )
 import System.IO.Error ( catchIOError )
 import System.Log ( Priority(..) )
+import Text.Read ( readMaybe )
 
-import Logging ( log_error ) -- Can't import report_error from Main
-import Terminal ( display_error ) -- 'cause of circular imports.
+-- Local imports.
+import Backend ( Backend(..) )
+import ConnectionString ( ConnectionString )
+import Network.Services.TSN.Report ( report_error )
 
 
 -- Derive standalone instances of Data and Typeable for Priority. This
@@ -42,17 +46,20 @@ import Terminal ( display_error ) -- 'cause of circular imports.
 deriving instance Data Priority
 deriving instance Typeable Priority
 
--- | The same as Configuration, except everything is optional. It's easy to
---   merge two of these by simply dropping the Nothings in favor of
---   the Justs. The 'feed_hosts' are left un-maybed so that cmdargs
---   can parse more than one of them.
+-- | The same as 'Configuration', except everything is optional. It's
+--   easy to merge two of these by simply dropping the 'Nothing's in
+--   favor of the 'Just's. The 'xml_files' are left un-maybed so that
+--   cmdargs can parse more than one of them.
 --
 data OptionalConfiguration =
   OptionalConfiguration {
-    connection_string :: Maybe String,
+    backend           :: Maybe Backend,
+    connection_string :: Maybe ConnectionString,
     log_file          :: Maybe FilePath,
     log_level         :: Maybe Priority,
-    syslog            :: Maybe Bool }
+    remove            :: Maybe Bool,
+    syslog            :: Maybe Bool,
+    xml_files         :: [FilePath] }
     deriving (Show, Data, Typeable)
 
 
@@ -66,8 +73,8 @@ merge_maybes Nothing (Just x)  = Just x
 merge_maybes (Just _) (Just y) = Just y
 
 
--- | The Monoid instance for these lets us "combine" two
---   OptionalConfigurations. The "combine" operation that we'd like to
+-- | The Monoid instance for these lets us \"combine\" two
+--   OptionalConfigurations. The \"combine\" operation that we'd like to
 --   perform is, essentially, to mash them together. So if we have two
 --   OptionalConfigurations, each half full, we could combine them
 --   into one big one.
@@ -76,17 +83,28 @@ merge_maybes (Just _) (Just y) = Just y
 --
 instance Monoid OptionalConfiguration where
   -- | An empty OptionalConfiguration.
-  mempty = OptionalConfiguration Nothing Nothing Nothing Nothing
+  mempty = OptionalConfiguration
+             Nothing
+             Nothing
+             Nothing
+             Nothing
+             Nothing
+             Nothing
+             []
 
 
   -- | Combine @cfg1@ and @cfg2@, giving precedence to @cfg2@.
+  --   XML files can only be specified on the command-line, so we
+  --   just join them together here.
   cfg1 `mappend` cfg2 =
     OptionalConfiguration
+     (merge_maybes (backend cfg1) (backend cfg2))
       (merge_maybes (connection_string cfg1) (connection_string cfg2))
       (merge_maybes (log_file cfg1) (log_file cfg2))
       (merge_maybes (log_level cfg1) (log_level cfg2))
+      (merge_maybes (remove cfg1) (remove cfg2))
       (merge_maybes (syslog cfg1) (syslog cfg2))
-
+      ((xml_files cfg1) ++ (xml_files cfg2))
 
 instance DCT.Configured Priority where
   -- | This allows us to read a Priority level out of a Configurator
@@ -111,24 +129,29 @@ instance DCT.Configured Priority where
 from_rc :: IO OptionalConfiguration
 from_rc = do
   etc  <- catchIOError getSysconfDir (\e -> do
-                                        display_error (show e)
-                                        log_error (show e)
+                                        report_error (show e)
                                         return "/etc")
   home <- catchIOError getHomeDirectory (\e -> do
-                                           display_error (show e)
-                                           log_error (show e)
+                                           report_error (show e)
                                            return "$(HOME)")
   let global_config_path = etc </> "htsn-importrc"
   let user_config_path = home </> ".htsn-importrc"
   cfg <- DC.load [ DC.Optional global_config_path,
                    DC.Optional user_config_path ]
+  cfg_backend <- DC.lookup cfg "backend"
   cfg_connection_string <- DC.lookup cfg "connection_string"
   cfg_log_file <- DC.lookup cfg "log_file"
   cfg_log_level <- DC.lookup cfg "log_level"
+  cfg_remove <- DC.lookup cfg "remove"
   cfg_syslog <- DC.lookup cfg "syslog"
-
+  let cfg_xml_files = [] -- This won't be in the config file.
   return $ OptionalConfiguration
+             (case cfg_backend of -- Try to convert a String to a Backend.
+                Nothing -> Nothing
+                Just s -> readMaybe s)
              cfg_connection_string
              cfg_log_file
              cfg_log_level
+             cfg_remove
              cfg_syslog
+             cfg_xml_files