X-Git-Url: https://ruin.nu/git/?p=yawbih.git;a=blobdiff_plain;f=Wiki.hs;h=a2b6548509f8282f73af4d2059216c4b91c23673;hp=1708f57f7d094276c3afd7dcc01c81e05f315a39;hb=64b58e5b75b4c8e95574fa9080166f5cf1079005;hpb=38f06e9262e9b2dd14906492539006602225d49e

diff --git a/Wiki.hs b/Wiki.hs
index 1708f57..a2b6548 100644
--- a/Wiki.hs
+++ b/Wiki.hs
@@ -1,11 +1,17 @@
 module Wiki (
-	Backend
+	Backend (getCurrent,getList,get,setCurrent,update,listKeys)
 	,PGB
+	,createPGB
+	,Markup (Text, Paragraph, Link, Bold, Emph, Heading, Url, Underline, Strike, Pre)
+	,Document
+	,wikiParser
+	,htmlOutput
 
 ) where
 
 import Dbconnect
 import Data.Char
+import Text.ParserCombinators.Parsec
 
 class Backend a where
 	--Keyword -> (Full text,date)
@@ -15,7 +21,7 @@ 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
@@ -23,12 +29,121 @@ 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
-	| Bold String
-	| Paragraph [Markup]
+	| Paragraph 
+	| Link String String
+	| Bold [Markup]
+	| Emph [Markup]
+	| Heading Int [Markup]
+	| Url String
+	| Underline [Markup]
+	| Strike [Markup]
+	| Pre 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'
+
+pLinkParser = do try (string "]]" >> return ([],[])) 
+	<|> try (do
+		string " | "
+		d <- pString "]]"
+		return ([],d))
+	<|> (do
+		c <- anyChar
+		(l,d) <- pLinkParser
+		return (c:l,d))
+
+pLink = do
+	string "[["
+	(l,d) <- pLinkParser
+	case d of
+		[] -> return (Link l l)
+		_ -> return (Link l d)
+
+pBold = pS "**" (\s -> Bold s)
+pEmph = pS "//" (\s -> Emph s)
+pUnderline = pS "__" (\s -> Underline s)
+pStrike = pS "--" (\s -> Strike s)
+
+pS s f = do
+	string s
+	s <- pStopAt s
+	return (f s)
+
+pStopAt xs = do 
+	try (string xs >> return []) <|> (do
+		s <- pMain 
+		ss <- pStopAt xs
+		return (s:ss))
+
+pString xs = do
+	try (string xs >> return []) <|> (do
+	s <- anyChar
+	ss <- pString xs
+	return (s:ss))
+	
+pHeading = do
+	many1 pEol
+	level <- many1 $ char '='
+	char ' '
+	s <- pStopAt (' ':level)
+	return (Heading (length level) s)
+
+pURL = do
+	proto <- many1 letter
+	string "://"
+	s <- many1 (alphaNum <|> oneOf "?.:&-/")
+	return (Url (proto++"://"++s))
+
+pPre = do
+	string "<pre>"
+	s <- pString "</pre>"
+	return (Pre s)
+	
+pMain = try (pHeading)
+	<|> (try (pPara) 
+	<|> pSpace 
+	<|> try(pPre) 
+	<|> try(pBold) 
+	<|> try(pEmph) 
+	<|> try(pUnderline) 
+	<|> try(pStrike) 
+	<|> 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
@@ -47,26 +162,28 @@ 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
-
-	get (PGB db) key id = return ""
+		case list of
+			[[]] -> return []
+			_ -> return $ map (\[id,date,author,comment] -> (id,date,author,comment)) list
+
+	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++"'"
-		cur <- selectReturnTuples db $ "SELECT keyword FROM curtexts WHERE keyword='"++tov key++"'"
+		cur <- selectReturnTuples db $ "SELECT keyword FROM curtexts WHERE keyword="++tov key
 		case full of
 			[[]] -> do
-				print "No text found with this id and key"
 				return False
 			_  -> do
 				rows <- case cur of
-					[] -> do
-						print "No link found in current, inserting"
-						execute db $ "INSERT INTO current (keyword, id) VALUES ("++tov id++","++tov key++")"
+					[[]] -> do
+						execute db $ "INSERT INTO current (keyword, id) VALUES ("++tov key++","++tov id++")"
 					_  -> do
-						print "Link found in current, updating"
 						execute db $ "UPDATE current SET id = "++tov id++" WHERE keyword = "++tov key
-				print rows
 				if rows == 1 then return True
 					else return False 
 
@@ -77,9 +194,34 @@ 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 fulltexts GROUP BY 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 ((Bold d):xs) = "<b>"++toHtml d++"</b>"++toHtml xs
+toHtml ((Emph d):xs) = "<em>"++toHtml d++"</em>"++toHtml xs
+toHtml ((Underline d):xs) = "<u>"++toHtml d++"</u>"++toHtml xs
+toHtml ((Strike d):xs) = "<strike>"++toHtml d++"</strike>"++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>"++s++"</pre>"++toHtml xs
+
+
+htmlOutput s = case parse wikiParser "" s of
+					Right n -> do 
+						putStr (toHtml n)
+					Left e -> do
+						print e