X-Git-Url: https://ruin.nu/git/?a=blobdiff_plain;f=Wiki.hs;h=94f4a5f433000c2a86cbd8eb19cc7ca1f8dffb8d;hb=625a2981711271d1f5841c55978d69881d6054da;hp=ab89fff9de0e8c6a9a6e6bd834b67fd589d26c81;hpb=69ecfedf2b7e27f50f7c2cedf534a036fe16907e;p=yawbih.git

diff --git a/Wiki.hs b/Wiki.hs
index ab89fff..94f4a5f 100644
--- a/Wiki.hs
+++ b/Wiki.hs
@@ -1,10 +1,12 @@
 module Wiki (
-	Backend (getCurrent,getList,get,setCurrent,update)
+	Backend (getCurrent,getList,get,setCurrent,update,listKeys)
 	,PGB
 	,createPGB
-	,Markup (Text, Paragraph, Link)
+	,Markup (Text, Paragraph, Font, Link, Heading, Url, Pre,List)
+	,FontOp (Bold, Emph, Mono, Underline, Strike)
 	,Document
 	,wikiParser
+	,htmlOutput
 
 ) where
 
@@ -20,7 +22,7 @@ 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
@@ -28,53 +30,161 @@ class Backend a where
 	--Keyword -> Full text -> id
 	update :: a -> String -> String -> String -> String -> IO String
 
+	--[Keyword]
+	listKeys :: a -> IO [String]
+
 data Markup = Text String
 	| Paragraph 
 	| Link String String
+	| Font FontOp [Markup]
+	| Heading Int [Markup]
+	| Url String
+	| Pre [Markup]
+	| List Bool [[Markup]]
+
+data FontOp = Bold | Emph | Mono | Underline | Strike
 
 type Document = [Markup]
 
-wikiParser :: GenParser Char st Document	
-wikiParser = do 
-	s <- (try (pPara) 
-		<|> pOneEol 
-		<|> pLinkLong
-		<|> pText)
-	ss <- (wikiParser <|> return [])
-	return (s:ss)
-
-pPara = do
-	pEol
-	pEol
-	return (Paragraph)
-
-pOneEol = do
-	pEol
-	return (Text " ")
-
-pEol = char '\n' <|> do
-	char '\r'
-	char '\n'
-
-pLinkLong = do
+wikiParser :: Parser Document	
+wikiParser = many1 pMain
+
+pPara :: Parser Markup	
+pPara = count 2 pEol >> return (Paragraph)
+
+pLink :: Parser Markup	
+pLink = do
 	string "[["
-	l <- many1 $ noneOf ['|','[',']']
-	char '|'
-	d <- many1 $ noneOf ['|','[',']'] 
-	string "]]"
-	return (Link l d)
+	(l,d) <- pLinkContent
+	case d of
+		[] -> return (Link l l)
+		_ -> return (Link l d)
+
+pList :: Bool -> Parser Markup
+pList enum = do
+	list <- many1 $ try $ pListItem enum
+	return (List enum list)
+
+pListItem :: Bool -> Parser [Markup]
+pListItem enum = do
+	many1 pEol
+	char $ listToken enum
+	many pOneLine
+
+listToken True = '#'
+listToken False = '*'
+	
+pHeading :: Parser Markup	
+pHeading = do
+	many1 pEol
+	level <- many1 $ char '='
+	s <- pStopAt level
+	return (Heading (length level) s)
+
+pURL :: Parser Markup	
+pURL = do
+	proto <- many1 letter
+	string "://"
+	s <- many1 (alphaNum <|> oneOf "?.:&-/~%=\\_")
+	return (Url (proto++"://"++s))
+
+pMail :: Parser Markup
+pMail = do
+	user <- many1 (alphaNum <|> oneOf ".-_")
+	char '@'
+	server <- many1 (alphaNum <|> oneOf ".-_")
+	return (Url ("mailto:"++user++"@"++server))
+	
+
+pPre :: Parser Markup	
+pPre = string "<pre>" >> do
+	s <- pUntil (pOneLine <|> pEol) "</pre>"
+	return (Pre s)
+
+pBold,pEmph,pUnderline,pStrike :: Parser Markup	
+pBold = pFont "**" Bold
+pEmph = pFont "//" Emph
+pUnderline = pFont "__" Underline
+pStrike = pFont "--" Strike
+pMono = pFont "||" Mono
+
+pFont s o = string s >> do
+	s <- pStopAt s
+	return (Font o s)
+
+pOtherChar :: Parser Markup	
+pOtherChar = do
+	c <- noneOf "\n\r"
+	return (Text (c:[]))
+
+pText :: Parser Markup	
 pText = do
-	t <- many1 (noneOf ['\n','\r','[',']'])
+	t <- many1 alphaNum
 	return (Text t)
 
+pLinkContent :: Parser (String, String)	
+pLinkContent = do try (string "]]" >> return ([],[])) 
+	<|> try (do
+		string " | "
+		d <- pString "]]"
+		return ([],d))
+	<|> (do
+		c <- anyChar
+		(l,d) <- pLinkContent
+		return (c:l,d))
+
+pStopAt :: String -> Parser Document	
+pStopAt xs = pUntil pOneLine xs
+
+pString :: String -> Parser String	
+pString xs = pUntil anyChar xs
+
+pEol :: Parser Markup	
+pEol = do
+	(string "\n" <|> string "\r\n")
+	return (Text "\r\n")
+
+pUntil :: Parser a -> String -> Parser [a]	
+pUntil p xs = manyTill p (try $ string xs)
+	
+pMain :: Parser Markup	
+pMain = choice [
+	try (pHeading)
+	,try $ pList True
+	,try $ pList False
+	,try (pPara) 
+	,try(pPre) 
+	,try(pBold) 
+	,try(pEmph) 
+	,try(pUnderline) 
+	,try(pStrike) 
+	,try(pMono) 
+	,try (pLink)
+	,try (pURL)
+	,try (pMail)
+	,pText
+	,pOtherChar
+	,pEol
+	]
+
+pOneLine = choice [
+	try pBold
+	,try pEmph
+	,try pUnderline
+	,try pStrike
+	,try pMono
+	,try pLink
+	,try pURL
+	,try pMail
+	,pText
+	,pOtherChar
+	]
+
 newtype PGB = PGB DBService
 
 createPGB :: String -> String -> String -> String -> IO PGB
 createPGB host database user password = let db = createDBService host database "" user password Nothing in return (PGB db)
 
-
-testDB = createPGB "wave" "wiki" "wiki" "12wiki34db"
-
 instance Backend PGB where
 
 	getCurrent (PGB db) key = do 
@@ -85,9 +195,15 @@ instance Backend PGB where
 
 	getList (PGB db) key = do
 		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
+		case list of
+			[[]] -> return []
+			_ -> 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++"'"
@@ -111,9 +227,36 @@ instance Backend PGB where
 				[[id]] <- selectReturnTuples db $ "SELECT currval('fulltexts_id_seq')" 
 				setCurrent (PGB db) key id
 				return id
-			
+
+	listKeys (PGB db) = do
+		list <- selectReturnTuples db $ "SELECT keyword FROM current keyword ORDER BY lower(keyword)"
+		case list of
+			[[]] -> return []
+			_ -> mapM (\[key] -> return key) list
 
 tov :: String -> String
 tov s = '\'':escapeQuery s++"'"
 		
+toHtml :: [Markup] -> String
+toHtml [] = []
+toHtml ((Paragraph):xs) = "<p>\n"++toHtml xs
+toHtml ((Text s):xs) = s++toHtml xs
+toHtml ((Link l d):xs) = "<link: "++l++" desc: "++d++">"++toHtml xs
+toHtml ((Font o d):xs) = "<"++fontOp o++">"++toHtml d++"</"++fontOp o++">"++toHtml xs
+toHtml ((Heading n d):xs) = "\n<h"++show n++">"++toHtml d++"</h"++show n++">\n"++toHtml xs
+toHtml ((Url l):xs) = "<link: "++l++">"++toHtml xs
+toHtml ((Pre s):xs) = "<pre>"++toHtml s++"</pre>"++toHtml xs
+toHtml ((List o l):xs) = "<"++listType o++">\n"++(unlines $ map (\s -> "<li>"++toHtml s++"</li>\n") l) ++ "</"++listType o++">"++toHtml xs
+
+listType True = "ol"
+listType False = "ul"
+
+fontOp Bold = "b"
+fontOp Emph = "em"
+fontOp Mono = "tt"
+fontOp Underline = "u"
+fontOp Strike = "strike"
 
+htmlOutput s = case parse wikiParser "" s of
+					Right n -> putStr (toHtml n)
+					Left e -> print e