module Wiki (
- Backend
+ Backend (getCurrent,getList,get,setCurrent,update)
,PGB
+ ,createPGB
+ ,Markup (Text, Paragraph, Link, Bold, Emph)
+ ,Document
+ ,wikiParser
) where
import Dbconnect
import Data.Char
+import Text.ParserCombinators.Parsec
class Backend a where
--Keyword -> (Full text,date)
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
update :: a -> String -> String -> String -> String -> IO String
data Markup = Text String
- | Bold String
- | Paragraph [Markup]
+ | Paragraph
+ | Link String String
+ | Bold [Markup]
+ | Emph [Markup]
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
+ (string xs >> return []) <|> (do
+ s <- pMain
+ ss <- pStringParser xs
+ return (s:ss))
+
+pMain = (try (pPara)
+ <|> pSpace
+ <|> try(pBold)
+ <|> try(pEmph)
+ <|> try (pLinkLong)
+ <|> try (pLink)
+ <|> 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
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++"'"
- 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