X-Git-Url: https://ruin.nu/git/?a=blobdiff_plain;f=Wiki.hs;h=59e592938df2e7fbb25634bb30b65dd357f05735;hb=ee02e144cc032d02afc0aaf3b1e73a1a68963ac6;hp=d6ece0dc5f4d94829dd09bfd86f657be3927f781;hpb=a3c05f5d3f4be5f28a3eae7739f138a07fa263ad;p=yawbih.git

diff --git a/Wiki.hs b/Wiki.hs
index d6ece0d..59e5929 100644
--- a/Wiki.hs
+++ b/Wiki.hs
@@ -2,11 +2,15 @@ module Wiki (
 	Backend (getCurrent,getList,get,setCurrent,update)
 	,PGB
 	,createPGB
+	,Markup (Text, Paragraph, Link, Bold, Emph, Heading, Url)
+	,Document
+	,wikiParser
 
 ) where
 
 import Dbconnect
 import Data.Char
+import Text.ParserCombinators.Parsec
 
 class Backend a where
 	--Keyword -> (Full text,date)
@@ -16,7 +20,7 @@ class Backend a where
 	getList :: a -> String -> IO [(String, String, String, String)]
 
 	--Keyword -> id -> Full text
-	get :: a -> String -> String -> IO String
+	get :: a -> String -> String -> IO (Maybe String)
 
 	--Keyword -> id -> ()
 	setCurrent :: a -> String -> String -> IO Bool
@@ -25,11 +29,98 @@ class Backend a where
 	update :: a -> String -> String -> String -> String -> IO String
 
 data Markup = Text String
-	| Bold String
-	| Paragraph [Markup]
+	| Paragraph 
+	| Link String String
+	| Bold [Markup]
+	| Emph [Markup]
+	| Heading Int [Markup]
+	| Url String
 
 type Document = [Markup]
 
+wikiParser :: GenParser Char st Document	
+wikiParser = do 
+	s <- pMain
+	ss <- (wikiParser <|> return [])
+	return (s:ss)
+
+pPara = do
+	pEol
+	pEol
+	return (Paragraph)
+
+
+pSpace = do
+	space 
+	return (Text " ")
+
+pEol = char '\n' <|> do
+	char '\r'
+	char '\n'
+
+pLinkLong = do
+	string "[["
+	l <- many1 $ noneOf ['|']
+	char '|'
+	d <- many1 $ noneOf "]" 
+	string "]]"
+	return (Link l d)
+
+pLink = do
+	string "[["
+	l <- many1 $ noneOf "]"
+	string "]]"
+	return (Link l l)
+
+pBold = do
+	string "**"
+	s <- pStringParser "**"
+	return (Bold s)
+
+pEmph = do
+	string "//"
+	s <- pStringParser "//"
+	return (Emph s)
+
+pStringParser xs = do 
+	try (string xs >> return []) <|> (do
+		s <- pMain 
+		ss <- pStringParser xs
+		return (s:ss))
+
+pHeading = do
+	many1 pEol
+	level <- many1 $ char '='
+	char ' '
+	s <- pStringParser (' ':level)
+	return (Heading (length level) s)
+
+pURL = do
+	proto <- many1 letter
+	string "://"
+	s <- many1 (alphaNum <|> oneOf "?.:&-/")
+	return (Url (proto++"://"++s))
+	
+pMain = try (pHeading)
+	<|> (try (pPara) 
+	<|> pSpace 
+	<|> try(pBold) 
+	<|> try(pEmph) 
+	<|> try (pLinkLong)
+	<|> try (pLink)
+	<|> try (pURL)
+	<|> pOtherChar
+	<|> pText)	
+
+pOtherChar = do
+	c <- oneOf "*,;.:!?[]()'\"=-%$£<>/\\|"
+	return (Text (c:[]))
+
+pText = do
+	t <- many1 alphaNum--(noneOf ['\n','\r','[',']'])
+	return (Text t)
+
+
 newtype PGB = PGB DBService
 
 createPGB :: String -> String -> String -> String -> IO PGB
@@ -50,7 +141,11 @@ instance Backend PGB where
 		list <- selectReturnTuples db $ "SELECT id, timestamp, author, comment from fulltexts WHERE keyword = "++tov key
 		return $ map (\[id,date,author,comment] -> (id,date,author,comment)) list
 
-	get (PGB db) key id = return ""
+	get (PGB db) key id = do
+		list <- selectReturnTuples db $ "SELECT fulltext from fulltexts WHERE id = "++tov id	
+		case list of
+			[s]:_ -> return (Just s)
+			_ -> return Nothing
 
 	setCurrent (PGB db) key id = do
 		full <- selectReturnTuples db $ "SELECT keyword FROM fulltexts WHERE keyword="++tov key++" AND id='"++id++"'"