import Control.Arrow.ArrowTree
import Data.Encoding
import Data.Encoding.UTF8
+import Data.Generics
import qualified Data.Map as M
import Network.HTTP.Lucu
import Rakka.Environment
interpretCommands :: Environment -> InterpTable -> Maybe Page -> WikiPage -> IO WikiPage
interpretCommands _ _ _ [] = return []
-interpretCommands env table page blocks = mapM interpBlock blocks
+interpretCommands env table page blocks = everywhereM' (mkM interpBlockCmd) blocks
+ >>=
+ everywhereM' (mkM interpInlineCmd)
where
- interpBlock :: BlockElement -> IO BlockElement
- interpBlock (List list) = interpList list >>= return . List
- interpBlock (DefinitionList defs) = mapM interpDefinition defs >>= return . DefinitionList
- interpBlock (Preformatted xs ) = mapM interpInline xs >>= return . Preformatted
- interpBlock (Paragraph xs ) = mapM interpInline xs >>= return . Paragraph
- interpBlock others = return others
-
- interpList :: ListElement -> IO ListElement
- interpList list = do items <- mapM interpListItem (listItems list)
- return $ list { listItems = items }
-
- interpListItem :: ListItem -> IO ListItem
- interpListItem [] = return []
- interpListItem ((Left nested):xs) = do x <- interpList nested >>= return . Left
- xs <- interpListItem xs
- return (x:xs)
- interpListItem ((Right inline):xs) = do x <- interpInline inline >>= return . Right
- xs <- interpListItem xs
- return (x:xs)
-
- interpDefinition :: Definition -> IO Definition
- interpDefinition def = do term <- mapM interpInline (defTerm def)
- desc <- mapM interpInline (defDesc def)
- return $ def { defTerm = term, defDesc = desc }
-
- interpInline :: InlineElement -> IO InlineElement
- interpInline (Italic xs ) = mapM interpInline xs >>= return . Italic
- interpInline (Bold xs ) = mapM interpInline xs >>= return . Bold
- interpInline (InlineCmd cmd) = interpInlineCmd cmd
- interpInline others = return others
-
- interpInlineCmd :: InlineCommand -> IO InlineElement
- interpInlineCmd cmd
+ ctx :: InterpreterContext
+ ctx = InterpreterContext {
+ ctxPage = page
+ , ctxTree = blocks
+ , ctxStorage = envStorage env
+ , ctxSysConf = envSysConf env
+ }
+
+ interpBlockCmd :: BlockElement -> IO BlockElement
+ interpBlockCmd (BlockCmd cmd) = interpBlockCmd' cmd
+ interpBlockCmd others = return others
+
+ interpBlockCmd' :: BlockCommand -> IO BlockElement
+ interpBlockCmd' cmd
+ = case M.lookup (bCmdName cmd) table of
+ Nothing
+ -> fail ("no such interpreter: " ++ bCmdName cmd)
+
+ Just interp
+ -> bciInterpret interp ctx cmd
+
+
+ interpInlineCmd :: InlineElement -> IO InlineElement
+ interpInlineCmd (InlineCmd cmd) = interpInlineCmd' cmd
+ interpInlineCmd others = return others
+
+ interpInlineCmd' :: InlineCommand -> IO InlineElement
+ interpInlineCmd' cmd
= case M.lookup (iCmdName cmd) table of
Nothing
-> fail ("no such interpreter: " ++ iCmdName cmd)
Just interp
- -> iciInterpret interp cmd page (envStorage env) (envSysConf env)
- >>=
- interpInline
+ -> iciInterpret interp ctx cmd
+
+
+-- Perform monadic transformation in top-down order.
+everywhereM' :: Monad m => GenericM m -> GenericM m
+everywhereM' f x = f x >>= gmapM (everywhereM' f)
formatParseError :: ArrowXml a => a ParseError XmlTree