module Wiki (
- Backend (getCurrent,getList,get,setCurrent,update)
+ Backend (getCurrent,getList,get,setCurrent,update,listKeys)
,PGB
,createPGB
- ,Markup (Text, Paragraph, Link, Bold, Emph, Heading, Url, Underline, Strike)
+ ,Markup (Text, Paragraph, Link, Bold, Emph, Heading, Url, Underline, Strike, Pre)
,Document
,wikiParser
+ ,htmlOutput
) 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
| 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)
+wikiParser = many1 pMain
pPara = do
pEol
pEol
return (Paragraph)
-
pSpace = do
- space
- return (Text " ")
+ c <- space
+ return (Text (c:[]))
pEol = char '\n' <|> do
char '\r'
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))
+pStopAt xs = pUntil pMain xs
+pString xs = pUntil anyChar xs
+pUntil p xs = manyTill p (try $ string xs)
pHeading = do
many1 pEol
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(pBold)
- <|> try(pEmph)
- <|> try(pUnderline)
- <|> try(pStrike)
- <|> try (pLink)
- <|> try (pURL)
- <|> pOtherChar
- <|> pText)
+pMain = choice [
+ 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','[',']'])
+ t <- many1 alphaNum
return (Text t)
-
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
[[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 ((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