gitit-0.3.4.1: Gitit.hs
{-# LANGUAGE CPP #-}
{-
Copyright (C) 2008 John MacFarlane <jgm@berkeley.edu>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-}
module Main where
import HAppS.Server hiding (look, lookRead, lookCookieValue, mkCookie)
import Gitit.HAppS (look, lookRead, lookCookieValue, mkCookie)
import HAppS.State hiding (Method)
import System.Environment
import System.IO.UTF8
import System.IO (stderr)
import System.IO.Error (isAlreadyExistsError)
import Control.Exception (bracket)
import Prelude hiding (writeFile, readFile, putStrLn, putStr)
import System.Process
import System.Directory
import System.Time
import Control.Concurrent
import System.FilePath
import Gitit.Git
import Gitit.State
import Text.XHtml hiding ( (</>), dir, method, password )
import qualified Text.XHtml as X ( password, method )
import Data.List (intersect, intersperse, intercalate, sort, nub, sortBy, isSuffixOf)
import Data.Maybe (fromMaybe, fromJust, mapMaybe, isNothing)
import Data.ByteString.UTF8 (fromString, toString)
import qualified Data.ByteString.Lazy.UTF8 as L (fromString)
import Codec.Binary.UTF8.String (decodeString, encodeString)
import qualified Data.Map as M
import Data.Ord (comparing)
import Data.Digest.Pure.SHA (sha512, showDigest)
import Paths_gitit
import Text.Pandoc
import Text.Pandoc.ODT (saveOpenDocumentAsODT)
import Text.Pandoc.Definition (processPandoc)
import Text.Pandoc.Shared (HTMLMathMethod(..), substitute)
import Data.Char (isAlphaNum, isAlpha)
import Control.Monad.Reader
import qualified Data.ByteString.Lazy as B
import Network.HTTP (urlEncodeVars, urlEncode)
import System.Console.GetOpt
import System.Exit
import Text.Highlighting.Kate
import qualified Text.StringTemplate as T
import Gitit.HStringTemplate (setAttribute)
import Data.IORef
import System.IO.Unsafe (unsafePerformIO)
gititVersion :: String
gititVersion = "0.3.4.1"
sessionTime :: Int
sessionTime = 60 * 60 -- session will expire 1 hour after page request
template :: IORef (T.StringTemplate String)
template = unsafePerformIO $ newIORef $ T.newSTMP "" -- initialize template to empty string
main :: IO ()
main = do
argv <- getArgs
options <- parseArgs argv
conf <- foldM handleFlag defaultConfig options
gitPath <- findExecutable "git"
when (isNothing gitPath) $ error "'git' program not found in system path."
initializeWiki conf
-- initialize template
templ <- liftIO $ readFile (templateFile conf)
writeIORef template (T.newSTMP templ)
control <- startSystemState entryPoint
update $ SetConfig conf
-- read user file and update state
userFileExists <- doesFileExist $ userFile conf
users' <- if userFileExists
then readFile (userFile conf) >>= (return . M.fromList . read)
else return M.empty
update $ SetUsers users'
hPutStrLn stderr $ "Starting server on port " ++ show (portNumber conf)
let debugger = if debugMode conf then debugFilter else id
tid <- forkIO $ simpleHTTP (Conf { validator = Nothing, port = portNumber conf }) $ debugger $
[ dir "css" [ fileServe [] $ staticDir conf </> "css" ]
, dir "img" [ fileServe [] $ staticDir conf </> "img" ]
, dir "js" [ fileServe [] $ staticDir conf </> "js" ]
] ++ (if debugMode conf then debugHandlers else []) ++ wikiHandlers
waitForTermination
putStrLn "Shutting down..."
-- write user file
users'' <- query AskUsers
liftIO $ writeFile (userFile conf) (showPrettyList $ M.toList users'')
killThread tid
createCheckpoint control
shutdownSystem control
putStrLn "Shutdown complete"
data Opt
= Help
| ConfigFile FilePath
| Version
deriving (Eq)
flags :: [OptDescr Opt]
flags =
[ Option ['h'] [] (NoArg Help)
"Print this help message"
, Option ['v'] [] (NoArg Version)
"Print version information"
, Option ['f'] [] (ReqArg ConfigFile "FILE")
"Specify configuration file"
]
parseArgs :: [String] -> IO [Opt]
parseArgs argv = do
progname <- getProgName
case getOpt Permute flags argv of
(opts,_,[]) -> return opts
(_,_,errs) -> hPutStrLn stderr (concat errs ++ usageInfo (usageHeader progname) flags) >>
exitWith (ExitFailure 1)
usageHeader :: String -> String
usageHeader progname = "Usage: " ++ progname ++ " [opts...]"
copyrightMessage :: String
copyrightMessage = "\nCopyright (C) 2008 John MacFarlane\n" ++
"This is free software; see the source for copying conditions. There is no\n" ++
"warranty, not even for merchantability or fitness for a particular purpose."
handleFlag :: Config -> Opt -> IO Config
handleFlag _ opt = do
progname <- getProgName
case opt of
Help -> hPutStrLn stderr (usageInfo (usageHeader progname) flags) >> exitWith ExitSuccess
Version -> hPutStrLn stderr (progname ++ " version " ++ gititVersion ++ copyrightMessage) >> exitWith ExitSuccess
ConfigFile f -> liftM read (readFile f)
entryPoint :: Proxy AppState
entryPoint = Proxy
showPrettyList :: Show a => [a] -> String
showPrettyList lst = "[\n" ++
concat (intersperse ",\n" $ map show lst) ++ "\n]"
-- | Create repository and public directories, unless they already exist.
initializeWiki :: Config -> IO ()
initializeWiki conf = do
let repodir = repositoryPath conf
let frontpage = frontPage conf <.> "page"
let staticdir = staticDir conf
let templatefile = templateFile conf
repoExists <- doesDirectoryExist repodir
unless repoExists $ do
postupdatepath <- getDataFileName $ "data" </> "post-update"
postupdatecontents <- B.readFile postupdatepath
welcomepath <- getDataFileName $ "data" </> "FrontPage.page"
welcomecontents <- B.readFile welcomepath
helppath <- getDataFileName $ "data" </> "Help.page"
helpcontents <- B.readFile helppath
createDirectory repodir
oldDir <- getCurrentDirectory
setCurrentDirectory repodir
runCommand "git init" >>= waitForProcess
-- add front page and help page
B.writeFile frontpage welcomecontents
B.writeFile "Help.page" helpcontents
runCommand ("git add 'Help.page' '" ++ frontpage ++ "'; git commit -m 'Initial commit.'") >>= waitForProcess
-- set post-update hook so working directory will be updated
-- when changes are pushed to the repo
let postupdate = ".git" </> "hooks" </> "post-update"
B.writeFile postupdate postupdatecontents
perms <- getPermissions postupdate
setPermissions postupdate (perms {executable = True})
hPutStrLn stderr $ "Created repository " ++ repodir
setCurrentDirectory oldDir
staticExists <- doesDirectoryExist staticdir
unless staticExists $ do
createDirectoryIfMissing True $ staticdir </> "css"
let stylesheets = map ("css" </>) ["screen.css", "print.css", "ie.css", "hk-pyg.css"]
stylesheetpaths <- mapM getDataFileName stylesheets
zipWithM_ copyFile stylesheetpaths (map (staticdir </>) stylesheets)
createDirectoryIfMissing True $ staticdir </> "img" </> "icons"
let imgs = map (("img" </>) . ("icons" </>))
["cross.png", "doc.png", "email.png", "external.png", "feed.png", "folder.png",
"im.png", "key.png", "page.png", "pdf.png", "tick.png", "xls.png"]
imgpaths <- mapM getDataFileName imgs
zipWithM_ copyFile imgpaths (map (staticdir </>) imgs)
logopath <- getDataFileName $ "img" </> "gitit-dog.png"
copyFile logopath (staticdir </> "img" </> "logo.png")
createDirectoryIfMissing True $ staticdir </> "js"
let javascripts = ["jquery.min.js", "jquery-ui.packed.js",
"folding.js", "dragdiff.js", "preview.js", "search.js", "uploadForm.js"]
javascriptpaths <- mapM getDataFileName $ map ("js" </>) javascripts
zipWithM_ copyFile javascriptpaths $ map ((staticdir </> "js") </>) javascripts
hPutStrLn stderr $ "Created " ++ staticdir ++ " directory"
jsMathExists <- doesDirectoryExist (staticdir </> "js" </> "jsMath")
unless jsMathExists $ do
hPutStrLn stderr $ replicate 80 '*' ++
"\nWarning: jsMath not found.\n" ++
"If you want support for math, copy the jsMath directory into " ++ staticdir ++ "/js/\n" ++
"jsMath can be obtained from http://www.math.union.edu/~dpvc/jsMath/\n" ++
replicate 80 '*'
templateExists <- doesFileExist templatefile
unless templateExists $ do
templatePath <- getDataFileName $ "data" </> "template.html"
copyFile templatePath templatefile
hPutStrLn stderr $ "Created " ++ templatefile
type Handler = ServerPart Response
debugHandlers :: [Handler]
debugHandlers = [ withCommand "debug" [ handlePage GET $ \page params -> ok (toResponse $ show (page, params)),
handlePage POST $ \page params -> ok (toResponse $ show (page, params)) ] ]
wikiHandlers :: [Handler]
wikiHandlers = [ handlePath "_index" GET indexPage
, handlePath "_activity" GET showActivity
, handlePath "_preview" POST preview
, handlePath "_search" POST searchResults
, handlePath "_search" GET searchResults
, handlePath "_register" GET registerUserForm
, handlePath "_register" POST registerUser
, handlePath "_login" GET loginUserForm
, handlePath "_login" POST loginUser
, handlePath "_logout" GET logoutUser
, handlePath "_upload" GET (ifLoggedIn uploadForm)
, handlePath "_upload" POST (ifLoggedIn uploadFile)
, handlePath "_random" GET randomPage
, withCommand "showraw" [ handlePage GET showRawPage ]
, withCommand "history" [ handlePage GET showPageHistory,
handle (not . isPage) GET showFileHistory ]
, withCommand "edit" [ handlePage GET $ unlessNoEdit $ ifLoggedIn editPage ]
, withCommand "diff" [ handlePage GET showPageDiff,
handle isSourceCode GET showFileDiff ]
, withCommand "export" [ handlePage POST exportPage, handlePage GET exportPage ]
, withCommand "cancel" [ handlePage POST showPage ]
, withCommand "discuss" [ handlePage GET discussPage ]
, withCommand "update" [ handlePage POST $ unlessNoEdit $ ifLoggedIn updatePage ]
, withCommand "delete" [ handlePage GET $ unlessNoDelete $ ifLoggedIn confirmDelete,
handlePage POST $ unlessNoDelete $ ifLoggedIn deletePage ]
, handleSourceCode
, handleAny
, handlePage GET showPage
]
data Params = Params { pUsername :: String
, pPassword :: String
, pPassword2 :: String
, pRevision :: String
, pDestination :: String
, pReferer :: Maybe String
, pUri :: String
, pForUser :: String
, pSince :: String
, pRaw :: String
, pLimit :: Int
, pPatterns :: [String]
, pEditedText :: Maybe String
, pMessages :: [String]
, pFrom :: String
, pTo :: String
, pFormat :: String
, pSHA1 :: String
, pLogMsg :: String
, pEmail :: String
, pFullName :: String
, pAccessCode :: String
, pWikiname :: String
, pPrintable :: Bool
, pOverwrite :: Bool
, pFilename :: String
, pFileContents :: B.ByteString
, pUser :: String
, pConfirm :: Bool
, pSessionKey :: Maybe SessionKey
} deriving Show
instance FromData Params where
fromData = do
un <- look "username" `mplus` return ""
pw <- look "password" `mplus` return ""
p2 <- look "password2" `mplus` return ""
rv <- look "revision" `mplus` return "HEAD"
fu <- look "forUser" `mplus` return ""
si <- look "since" `mplus` return ""
ds <- (lookCookieValue "destination") `mplus` return "/"
ra <- look "raw" `mplus` return ""
lt <- look "limit" `mplus` return "100"
pa <- look "patterns" `mplus` return ""
me <- lookRead "messages" `mplus` return []
fm <- look "from" `mplus` return "HEAD"
to <- look "to" `mplus` return "HEAD"
et <- (look "editedText" >>= return . Just . filter (/= '\r')) `mplus` return Nothing
fo <- look "format" `mplus` return ""
sh <- look "sha1" `mplus` return ""
lm <- look "logMsg" `mplus` return ""
em <- look "email" `mplus` return ""
na <- look "fullname" `mplus` return ""
wn <- look "wikiname" `mplus` return ""
pr <- (look "printable" >> return True) `mplus` return False
ow <- (look "overwrite" >>= return . (== "yes")) `mplus` return False
fn <- (lookInput "file" >>= return . fromMaybe "" . inputFilename) `mplus` return ""
fc <- (lookInput "file" >>= return . inputValue) `mplus` return B.empty
ac <- look "accessCode" `mplus` return ""
cn <- (look "confirm" >> return True) `mplus` return False
sk <- (readCookieValue "sid" >>= return . Just) `mplus` return Nothing
return $ Params { pUsername = un
, pPassword = pw
, pPassword2 = p2
, pRevision = rv
, pForUser = fu
, pSince = si
, pDestination = ds
, pReferer = Nothing -- this gets set by handle...
, pUri = "" -- this gets set by handle...
, pRaw = ra
, pLimit = read lt
, pPatterns = words pa
, pMessages = me
, pFrom = fm
, pTo = to
, pEditedText = et
, pFormat = fo
, pSHA1 = sh
, pLogMsg = lm
, pEmail = em
, pFullName = na
, pWikiname = wn
, pPrintable = pr
, pOverwrite = ow
, pFilename = fn
, pFileContents = fc
, pAccessCode = ac
, pUser = "" -- this gets set by ifLoggedIn...
, pConfirm = cn
, pSessionKey = sk
}
getLoggedInUser :: MonadIO m => Params -> m (Maybe String)
getLoggedInUser params = do
mbSd <- maybe (return Nothing) ( query . GetSession ) $ pSessionKey params
let user = case mbSd of
Nothing -> Nothing
Just sd -> Just $ sessionUser sd
return $! user
data Command = Command (Maybe String)
commandList :: [String]
commandList = ["debug", "edit", "showraw", "history", "export", "diff", "cancel", "update", "delete", "discuss"]
instance FromData Command where
fromData = do
pairs <- lookPairs
return $ case map fst pairs `intersect` commandList of
[] -> Command Nothing
(c:_) -> Command $ Just c
unlessNoEdit :: (String -> Params -> Web Response) -> (String -> Params -> Web Response)
unlessNoEdit responder =
\page params -> do cfg <- query GetConfig
if page `elem` noEdit cfg
then showPage page (params { pMessages = ("Page is locked." : pMessages params) })
else responder page params
unlessNoDelete :: (String -> Params -> Web Response) -> (String -> Params -> Web Response)
unlessNoDelete responder =
\page params -> do cfg <- query GetConfig
if page `elem` noDelete cfg
then showPage page (params { pMessages = ("Page cannot be deleted." : pMessages params) })
else responder page params
ifLoggedIn :: (String -> Params -> Web Response) -> (String -> Params -> Web Response)
ifLoggedIn responder =
\page params -> do user <- getLoggedInUser params
case user of
Nothing -> do
loginUserForm page (params { pReferer = Just $ pUri params })
Just u -> do
usrs <- query AskUsers
let e = case M.lookup u usrs of
Just usr -> uEmail usr
Nothing -> error $ "User '" ++ u ++ "' not found."
-- give the user another hour...
addCookie sessionTime (mkCookie "sid" (show $ fromJust $ pSessionKey params))
responder page (params { pUser = u, pEmail = e })
handle :: (String -> Bool) -> Method -> (String -> Params -> Web Response) -> Handler
handle pathtest meth responder = uriRest $ \uri ->
let path' = decodeString $ uriPath uri
in if pathtest path'
then withData $ \params ->
[ withRequest $ \req ->
if rqMethod req == meth
then let referer = case M.lookup (fromString "referer") (rqHeaders req) of
Just r | not (null (hValue r)) -> Just $ toString $ head $ hValue r
_ -> Nothing
in responder path' (params { pReferer = referer, pUri = uri })
else noHandle ]
else anyRequest noHandle
-- | Returns path portion of URI, without initial /.
-- Consecutive spaces are collapsed. We don't want to distinguish 'Hi There' and 'Hi There'.
uriPath :: String -> String
uriPath = unwords . words . drop 1 . takeWhile (/='?')
handlePage :: Method -> (String -> Params -> Web Response) -> Handler
handlePage = handle isPage
handleText :: Method -> (String -> Params -> Web Response) -> Handler
handleText = handle (\x -> isPage x || isSourceCode x)
handlePath :: String -> Method -> (String -> Params -> Web Response) -> Handler
handlePath path' = handle (== path')
withCommand :: String -> [Handler] -> Handler
withCommand command handlers =
withData $ \com -> case com of
Command (Just c) | c == command -> handlers
_ -> []
handleSourceCode :: Handler
handleSourceCode = withData $ \com ->
case com of
Command (Just "showraw") -> [ handle isSourceCode GET showFileAsText ]
_ -> [ handle isSourceCode GET showHighlightedSource ]
handleAny :: Handler
handleAny =
uriRest $ \uri -> let path' = uriPath uri
in do cfg <- query GetConfig
let file = repositoryPath cfg </> path'
exists <- liftIO $ doesFileExist file
if exists
then fileServe [path'] (repositoryPath cfg)
else anyRequest noHandle
orIfNull :: String -> String -> String
orIfNull str backup = if null str then backup else str
isPage :: String -> Bool
isPage ('_':_) = False
isPage s = '.' `notElem` s
isDiscussPage :: String -> Bool
isDiscussPage s = isPage s && ":discuss" `isSuffixOf` s
isSourceCode :: String -> Bool
isSourceCode = not . null . languagesByExtension . takeExtension
urlForPage :: String -> String
urlForPage page = '/' : (substitute "%2f" "/" $ urlEncode $ encodeString page)
-- this is needed so that browsers recognize relative URLs correctly
pathForPage :: String -> FilePath
pathForPage page = page <.> "page"
withCommands :: Method -> [String] -> (String -> Request -> Web Response) -> Handler
withCommands meth commands page = withRequest $ \req -> do
if rqMethod req /= meth
then noHandle
else if all (`elem` (map fst $ rqInputs req)) commands
then page (intercalate "/" $ rqPaths req) req
else noHandle
setContentType :: String -> Response -> Response
setContentType contentType res =
let respHeaders = rsHeaders res
newContentType = HeaderPair { hName = fromString "Content-Type",
hValue = [ fromString contentType ] }
in res { rsHeaders = M.insert (fromString "content-type") newContentType respHeaders }
setFilename :: String -> Response -> Response
setFilename fname res =
let respHeaders = rsHeaders res
newContentType = HeaderPair { hName = fromString "Content-Disposition",
hValue = [ fromString $ "attachment; filename=\"" ++ fname ++ "\"" ] }
in res { rsHeaders = M.insert (fromString "content-disposition") newContentType respHeaders }
showRawPage :: String -> Params -> Web Response
showRawPage = showFileAsText . pathForPage
showFileAsText :: String -> Params -> Web Response
showFileAsText file params = do
mContents <- rawContents file params
case mContents of
Nothing -> error "Unable to retrieve page contents."
Just c -> ok $ setContentType "text/plain; charset=utf-8" $ toResponse c
randomPage :: String -> Params -> Web Response
randomPage _ _ = do
files <- gitLsTree "HEAD"
let pages = map dropExtension $ filter (\f -> takeExtension f == ".page" && not (":discuss.page" `isSuffixOf` f)) files
if null pages
then error "No pages found!"
else do
TOD _ picosecs <- liftIO getClockTime
let newPage = pages !! ((fromIntegral picosecs `div` 1000000) `mod` length pages)
seeOther (urlForPage newPage) $ toResponse $ p << "Redirecting to a random page"
showPage :: String -> Params -> Web Response
showPage "" params = do
cfg <- query GetConfig
showPage (frontPage cfg) params
showPage page params = do
let revision = pRevision params
mDoc <- pageAsPandoc page params
case mDoc of
Just d -> do
cont <- pandocToHtml d
let cont' = thediv ! [identifier "wikipage",
strAttr "onDblClick" ("window.location = '" ++ urlForPage page ++
"?edit&revision=" ++ revision ++
(if revision == "HEAD"
then ""
else '&' : urlEncodeVars [("logMsg", "Revert to " ++ revision)]) ++ "';")] << cont
formattedPage (defaultPageLayout { pgScripts = ["jsMath/easy/load.js"]}) page params cont'
_ -> if revision == "HEAD"
then createPage page params
else error $ "Invalid revision: " ++ revision
discussPage :: String -> Params -> Web Response
discussPage page params = do
if isDiscussPage page
then showPage page params
else showPage (page ++ ":discuss") params
createPage :: String -> Params -> Web Response
createPage page params =
formattedPage (defaultPageLayout { pgTabs = [] }) page params $
p << [ stringToHtml ("There is no page '" ++ page ++ "'. You may create the page by ")
, anchor ! [href $ urlForPage page ++ "?edit"] << "clicking here." ]
validate :: [(Bool, String)] -- ^ list of conditions and error messages
-> [String] -- ^ list of error messages
validate = foldl go []
where go errs (condition, msg) = if condition then msg:errs else errs
uploadForm :: String -> Params -> Web Response
uploadForm _ params = do
let page = "_upload"
let origPath = pFilename params
let wikiname = pWikiname params `orIfNull` takeFileName origPath
let logMsg = pLogMsg params
let upForm = form ! [X.method "post", enctype "multipart/form-data"] << fieldset <<
[ p << [label << "File to upload:", br, afile "file" ! [value origPath] ]
, p << [label << "Name on wiki, including extension",
noscript << " (leave blank to use the same filename)", stringToHtml ":", br,
textfield "wikiname" ! [value wikiname],
primHtmlChar "nbsp", checkbox "overwrite" "yes", label << "Overwrite existing file"]
, p << [label << "Description of content or changes:", br, textfield "logMsg" ! [size "60", value logMsg],
submit "upload" "Upload"] ]
formattedPage (defaultPageLayout { pgScripts = ["uploadForm.js"], pgShowPageTools = False, pgTabs = [], pgTitle = "Upload a file"} ) page params upForm
uploadFile :: String -> Params -> Web Response
uploadFile _ params = do
let page = "_upload"
let origPath = pFilename params
let fileContents = pFileContents params
let wikiname = pWikiname params `orIfNull` takeFileName origPath
let logMsg = pLogMsg params
cfg <- query GetConfig
let author = pUser params
when (null author) $ fail "User must be logged in to upload a file."
let email = pEmail params
let overwrite = pOverwrite params
exists <- liftIO $ doesFileExist (repositoryPath cfg </> wikiname)
let imageExtensions = [".png", ".jpg", ".gif"]
let errors = validate [ (null logMsg, "Description cannot be empty.")
, (null origPath, "File not found.")
, (not overwrite && exists, "A file named '" ++ wikiname ++
"' already exists in the repository: choose a new name " ++
"or check the box to overwrite the existing file existing file.")
, (B.length fileContents > fromIntegral (maxUploadSize cfg),
"File exceeds maximum upload size.")
, (isPage wikiname,
"This file extension is reserved for wiki pages.")
]
if null errors
then do
when (B.length fileContents > fromIntegral (maxUploadSize cfg)) $
error "File exceeds maximum upload size"
let dir' = takeDirectory wikiname
liftIO $ createDirectoryIfMissing True ((repositoryPath cfg) </> dir')
liftIO $ B.writeFile (repositoryPath cfg </> wikiname) fileContents
gitCommit wikiname (author, email) logMsg
formattedPage (defaultPageLayout { pgShowPageTools = False, pgTabs = [], pgTitle = "Upload successful" }) page params $
thediv << [ h2 << ("Uploaded " ++ show (B.length fileContents) ++ " bytes")
, if takeExtension wikiname `elem` imageExtensions
then p << "To add this image to a page, use:" +++
pre << ("![alt text](/" ++ wikiname ++ ")")
else p << "To link to this resource from a page, use:" +++
pre << ("[link label](/" ++ wikiname ++ ")") ]
else uploadForm page (params { pMessages = errors })
searchResults :: String -> Params -> Web Response
searchResults _ params = do
let page = "_search"
let patterns = pPatterns params
let limit = pLimit params
matchLines <- if null patterns
then return []
else liftM (map parseMatchLine . take limit . lines) (gitGrep patterns)
let matchedFiles = nub $ filter (".page" `isSuffixOf`) $ map fst matchLines
let matches = map (\f -> (f, mapMaybe (\(a,b) -> if a == f then Just b else Nothing) matchLines)) matchedFiles
let preamble = if null matches
then h3 << if null patterns
then ["Please enter a search term."]
else ["No matches found for '", unwords patterns, "':"]
else h3 << [(show $ length matches), " matches found for '", unwords patterns, "':"]
let htmlMatches = preamble +++ olist << map
(\(file, contents) -> li << [anchor ! [href $ urlForPage $ takeBaseName file] << takeBaseName file,
stringToHtml (" (" ++ show (length contents) ++ " matching lines)"),
stringToHtml " ", anchor ! [href "#", theclass "showmatch", thestyle "display: none;"] << "[show matches]",
pre ! [theclass "matches"] << unlines contents])
(reverse $ sortBy (comparing (length . snd)) matches)
formattedPage (defaultPageLayout { pgShowPageTools = False, pgTabs = [], pgScripts = ["search.js"], pgTitle = "Search results"}) page params htmlMatches
-- Auxiliary function for searchResults
parseMatchLine :: String -> (String, String)
parseMatchLine matchLine =
let (file, rest) = break (==':') matchLine
contents = drop 1 rest -- strip off colon
in (file, contents)
preview :: String -> Params -> Web Response
preview _ params = pandocToHtml (textToPandoc $ pRaw params) >>= ok . toResponse
showPageHistory :: String -> Params -> Web Response
showPageHistory page params = showHistory (pathForPage page) page params
showFileHistory :: String -> Params -> Web Response
showFileHistory file params = showHistory file file params
showHistory :: String -> String -> Params -> Web Response
showHistory file page params = do
let since = pSince params `orIfNull` "1 year ago"
hist <- gitLog since "" [file]
if null hist
then noHandle
else do
let versionToHtml entry pos =
li ! [theclass "difflink", intAttr "order" pos, strAttr "revision" $ logRevision entry] <<
[thespan ! [theclass "date"] << logDate entry, stringToHtml " (",
thespan ! [theclass "author"] <<
anchor ! [href $ "/_activity?" ++ urlEncodeVars [("forUser", logAuthor entry)]] <<
(logAuthor entry), stringToHtml ")", stringToHtml ": ",
anchor ! [href (urlForPage page ++ "?revision=" ++ logRevision entry)] <<
thespan ! [theclass "subject"] << logSubject entry,
noscript << ([stringToHtml " [compare with ",
anchor ! [href $ urlForPage page ++ "?diff&from=" ++ logRevision entry ++
"^&to=" ++ logRevision entry] << "previous"] ++
(if pos /= 1
then [primHtmlChar "nbsp", primHtmlChar "bull",
primHtmlChar "nbsp",
anchor ! [href $ urlForPage page ++ "?diff&from=" ++
logRevision entry ++ "&to=HEAD"] << "current" ]
else []) ++
[stringToHtml "]"])]
let contents = ulist ! [theclass "history"] << zipWith versionToHtml hist [(length hist), (length hist - 1)..1]
formattedPage (defaultPageLayout { pgScripts = ["dragdiff.js"], pgSelectedTab = HistoryTab, pgTitle = ("Changes to " ++ page) }) page params contents
showActivity :: String -> Params -> Web Response
showActivity _ params = do
let page = "_activity"
let since = pSince params `orIfNull` "1 month ago"
let forUser = pForUser params
hist <- gitLog since forUser []
let filesFor files revis = intersperse (primHtmlChar "nbsp") $ map
(\file -> anchor ! [href $ urlForPage file ++ "?diff&from=" ++ revis ++ "^" ++ "&to=" ++ revis] << file) $ map
(\file -> if ".page" `isSuffixOf` file then dropExtension file else file) files
let heading = h1 << ("Recent changes" ++ if null forUser then "" else (" by " ++ forUser))
let contents = ulist ! [theclass "history"] << map (\entry -> li <<
[thespan ! [theclass "date"] << logDate entry, stringToHtml " (",
thespan ! [theclass "author"] <<
anchor ! [href $ "/_activity?" ++ urlEncodeVars [("forUser", logAuthor entry)]] <<
(logAuthor entry), stringToHtml "): ",
thespan ! [theclass "subject"] << logSubject entry, stringToHtml " (",
thespan ! [theclass "files"] << filesFor (logFiles entry) (logRevision entry),
stringToHtml ")"]) hist
formattedPage (defaultPageLayout { pgShowPageTools = False, pgTabs = [], pgTitle = "Recent changes" }) page params (heading +++ contents)
showPageDiff :: String -> Params -> Web Response
showPageDiff page params = showDiff (pathForPage page) page params
showFileDiff :: String -> Params -> Web Response
showFileDiff page params = showDiff page page params
showDiff :: String -> String -> Params -> Web Response
showDiff file page params = do
let from = pFrom params
let to = pTo params
rawDiff <- gitDiff file from to
let diffLineToHtml l = case head l of
'+' -> thespan ! [theclass "added"] << [tail l, "\n"]
'-' -> thespan ! [theclass "deleted"] << [tail l, "\n"]
_ -> thespan << [tail l, "\n"]
let formattedDiff = h2 ! [theclass "revision"] << ("Changes from " ++ from) +++
pre ! [theclass "diff"] << map diffLineToHtml (drop 5 $ lines rawDiff)
formattedPage (defaultPageLayout { pgTabs = DiffTab : pgTabs defaultPageLayout, pgSelectedTab = DiffTab })
page (params { pRevision = to }) formattedDiff
editPage :: String -> Params -> Web Response
editPage page params = do
let revision = pRevision params
let messages = pMessages params
raw <- case pEditedText params of
Nothing -> gitCatFile revision (pathForPage page)
Just t -> return $ Just t
let contents = case raw of
Nothing -> ""
Just c -> c
sha1 <- case (pSHA1 params) of
"" -> gitGetSHA1 (pathForPage page) >>= return . fromMaybe ""
s -> return s
let logMsg = pLogMsg params
let sha1Box = textfield "sha1" ! [thestyle "display: none", value sha1]
let editForm = gui (urlForPage page) ! [identifier "editform"] <<
[sha1Box,
textarea ! [cols "80", name "editedText", identifier "editedText"] << contents, br,
label << "Description of changes:", br,
textfield "logMsg" ! [value logMsg],
submit "update" "Save", primHtmlChar "nbsp",
submit "cancel" "Discard", primHtmlChar "nbsp",
input ! [thetype "button", theclass "editButton", identifier "previewButton",
strAttr "onClick" "updatePreviewPane();", strAttr "style" "display: none;", value "Preview" ],
thediv ! [ identifier "previewpane" ] << noHtml ]
formattedPage (defaultPageLayout { pgShowPageTools = False, pgSelectedTab = EditTab,
pgScripts = ["preview.js"], pgTitle = ("Editing " ++ page) }) page (params {pMessages = messages}) editForm
confirmDelete :: String -> Params -> Web Response
confirmDelete page params = do
let confirmForm = gui "" <<
[ p << "Are you sure you want to delete this page?"
, submit "confirm" "Yes, delete it!"
, stringToHtml " "
, submit "cancel" "No, keep it!"
, br ]
formattedPage defaultPageLayout page params confirmForm
deletePage :: String -> Params -> Web Response
deletePage page params = do
if pConfirm params
then do
let author = pUser params
when (null author) $ fail "User must be logged in to delete page."
let email = pEmail params
gitRemove (pathForPage page) (author, email) "Deleted from web."
seeOther "/" $ toResponse $ p << "Page deleted"
else seeOther (urlForPage page) $ toResponse $ p << "Page not deleted"
updatePage :: String -> Params -> Web Response
updatePage page params = do
let author = pUser params
when (null author) $ fail "User must be logged in to update page."
let editedText = case pEditedText params of
Nothing -> error "No body text in POST request"
Just b -> b
let email = pEmail params
let logMsg = pLogMsg params
let oldSHA1 = pSHA1 params
if null logMsg
then editPage page (params { pMessages = ["Description cannot be empty."] })
else do
cfg <- query GetConfig
if length editedText > fromIntegral (maxUploadSize cfg)
then error "Page exceeds maximum size."
else return ()
currentSHA1 <- gitGetSHA1 (pathForPage page) >>= return . fromMaybe ""
-- ensure that every file has a newline at the end, to avoid "No newline at eof" messages in diffs
let editedText' = if null editedText || last editedText == '\n' then editedText else editedText ++ "\n"
-- check SHA1 in case page has been modified, merge
if currentSHA1 == oldSHA1
then do
let dir' = takeDirectory page
liftIO $ createDirectoryIfMissing True ((repositoryPath cfg) </> dir')
liftIO $ writeFile ((repositoryPath cfg) </> pathForPage page) editedText'
gitCommit (pathForPage page) (author, email) logMsg
seeOther (urlForPage page) $ toResponse $ p << "Page updated"
else do -- there have been conflicting changes
original <- gitCatFile oldSHA1 (pathForPage page) >>= return . fromJust
latest <- gitCatFile currentSHA1 (pathForPage page) >>= return . fromJust
let pagePath = repositoryPath cfg </> pathForPage page
let [textTmp, originalTmp, latestTmp] = map (pagePath ++) [".edited",".original",".latest"]
liftIO $ writeFile textTmp editedText'
liftIO $ writeFile originalTmp original
liftIO $ writeFile latestTmp latest
mergeText <- gitMergeFile (pathForPage page ++ ".edited") (pathForPage page ++ ".original") (pathForPage page ++ ".latest")
liftIO $ mapM removeFile [textTmp, originalTmp, latestTmp]
let mergeMsg = "The page has been edited since you checked it out. " ++
"Changes have been merged into your edits below. " ++
"Please resolve conflicts and Save."
editPage page (params { pEditedText = Just mergeText
, pRevision = "HEAD"
, pSHA1 = currentSHA1
, pMessages = [mergeMsg] })
indexPage :: String -> Params -> Web Response
indexPage _ params = do
let page = "_index"
let revision = pRevision params
files <- gitLsTree revision
let htmlIndex = fileListToHtml "/" $ map splitPath $ sort $ filter (\f -> not (":discuss.page" `isSuffixOf` f)) files
formattedPage (defaultPageLayout { pgShowPageTools = False, pgTabs = [], pgScripts = ["folding.js"], pgTitle = "All pages" }) page params htmlIndex
-- | Map a list of nonempty lists onto a list of pairs of list heads and list of tails.
-- e.g. [[1,2],[1],[2,1]] -> [(1,[[2],[]]), (2,[[1]])]
consolidateHeads :: Eq a => [[a]] -> [(a,[[a]])]
consolidateHeads lst =
let heads = nub $ map head lst
tailsFor h = map tail [l | l <- lst, head l == h]
in map (\h -> (h, tailsFor h)) heads
-- | Create a hierarchical ordered list (with links) for a list of files
fileListToHtml :: String -> [[FilePath]] -> Html
fileListToHtml prefix lst = ulist ! [identifier "index", theclass "folding"] <<
(map (\(h, l) -> let h' = if takeExtension h == ".page" then dropExtension h else h
in if [] `elem` l
then li ! [theclass $ if takeExtension h == ".page" then "page" else "upload"] << anchor ! [href $ prefix ++ h'] << h'
else li ! [theclass "folder"] << [stringToHtml h', fileListToHtml (prefix ++ h') l]) $
consolidateHeads lst)
-- | Convert links with no URL to wikilinks, if their labels are all strings and spaces
convertWikiLinks :: Inline -> Inline
convertWikiLinks (Link ref ("", "")) | all isStringOrSpace ref =
Link ref (refToUrl ref, "Go to wiki page")
convertWikiLinks x = x
isStringOrSpace :: Inline -> Bool
isStringOrSpace Space = True
isStringOrSpace (Str _) = True
isStringOrSpace _ = False
refToUrl :: [Inline] -> String
refToUrl ((Str x):xs) = x ++ refToUrl xs
refToUrl (Space:xs) = "%20" ++ refToUrl xs
refToUrl (_:_) = error "Encountered an inline other than Str or Space"
refToUrl [] = ""
-- | Converts pandoc document to HTML.
pandocToHtml :: MonadIO m => Pandoc -> m Html
pandocToHtml pandocContents = do
cfg <- query GetConfig
return $ writeHtml (defaultWriterOptions { writerStandalone = False
, writerHTMLMathMethod = JsMath (Just "/js/jsMath/easy/load.js")
, writerTableOfContents = tableOfContents cfg
}) $ processPandoc convertWikiLinks pandocContents
-- | Abstract representation of page layout (tabs, scripts, etc.)
data PageLayout = PageLayout
{ pgTitle :: String
, pgScripts :: [String]
, pgShowPageTools :: Bool
, pgTabs :: [Tab]
, pgSelectedTab :: Tab
}
data Tab = ViewTab | EditTab | HistoryTab | DiscussTab | DiffTab deriving (Eq, Show)
defaultPageLayout :: PageLayout
defaultPageLayout = PageLayout
{ pgTitle = ""
, pgScripts = []
, pgShowPageTools = True
, pgTabs = [ViewTab, EditTab, HistoryTab, DiscussTab]
, pgSelectedTab = ViewTab
}
-- | Returns formatted page
formattedPage :: PageLayout -> String -> Params -> Html -> Web Response
formattedPage layout page params htmlContents = do
let revision = pRevision params
let path' = if isPage page then pathForPage page else page
sha1 <- if revision == "HEAD"
then gitGetSHA1 path' >>= return . fromMaybe ""
else return revision
user <- getLoggedInUser params
let javascriptlinks = if null (pgScripts layout)
then ""
else renderHtmlFragment $ concatHtml $ map
(\x -> script ! [src ("/js/" ++ x), thetype "text/javascript"] << noHtml)
(["jquery.min.js", "jquery-ui.packed.js"] ++ pgScripts layout)
let pageTitle = pgTitle layout `orIfNull` page
let tabli tab = if tab == pgSelectedTab layout
then li ! [theclass "selected"]
else li
let origPage s = if ":discuss" `isSuffixOf` s then take (length s - 8) s else s
let linkForTab HistoryTab = Just $ tabli HistoryTab << anchor ! [href $ urlForPage page ++ "?revision=" ++ revision ++ "&history"] << "history"
linkForTab DiffTab = Just $ tabli DiffTab << anchor ! [href ""] << "diff"
linkForTab ViewTab = if isDiscussPage page
then Just $ tabli DiscussTab << anchor ! [href $ urlForPage $ origPage page] << "page"
else Just $ tabli ViewTab << anchor ! [href $ urlForPage page ++ if revision == "HEAD" then "" else "?revision=" ++ revision] << "view"
linkForTab DiscussTab = if isDiscussPage page
then Just $ tabli ViewTab << anchor ! [href $ urlForPage page] << "discuss"
else if isPage page
then Just $ tabli DiscussTab << anchor ! [href $ urlForPage page ++ "?discuss"] << "discuss"
else Nothing
linkForTab EditTab = if isPage page
then Just $ tabli EditTab << anchor ! [href $ urlForPage page ++ "?edit&revision=" ++ revision ++
if revision == "HEAD" then "" else "&" ++ urlEncodeVars [("logMsg", "Revert to " ++ revision)]] <<
if revision == "HEAD" then "edit" else "revert"
else Nothing
let tabs = ulist ! [theclass "tabs"] << mapMaybe linkForTab (pgTabs layout)
let searchbox = gui ("/_search") ! [identifier "searchform"] <<
[ textfield "patterns"
, submit "search" "Search" ]
let messages = pMessages params
let htmlMessages = if null messages
then noHtml
else ulist ! [theclass "messages"] << map (li <<) messages
templ <- liftIO $ readIORef template
let filledTemp = T.render $
setAttribute "pagetitle" pageTitle $
setAttribute "javascripts" javascriptlinks $
setAttribute "pagename" page $
(case user of
Just u -> setAttribute "user" u
Nothing -> id) $
(if isPage page then setAttribute "ispage" "true" else id) $
(if pgShowPageTools layout then setAttribute "pagetools" "true" else id) $
(if pPrintable params then setAttribute "printable" "true" else id) $
(if pRevision params == "HEAD" then id else setAttribute "nothead" "true") $
setAttribute "revision" revision $
setAttribute "sha1" sha1 $
setAttribute "searchbox" (renderHtmlFragment searchbox) $
setAttribute "exportbox" (renderHtmlFragment $ exportBox page params) $
setAttribute "tabs" (renderHtmlFragment tabs) $
setAttribute "messages" (renderHtmlFragment htmlMessages) $
setAttribute "content" (renderHtmlFragment htmlContents) $
templ
ok $ setContentType "text/html" $ toResponse filledTemp
-- user authentication
loginForm :: Html
loginForm =
gui "/_login" ! [identifier "loginForm"] << fieldset <<
[ label << "Username ", textfield "username" ! [size "15"], stringToHtml " "
, label << "Password ", X.password "password" ! [size "15"], stringToHtml " "
, submit "login" "Login"] +++
p << [ stringToHtml "If you do not have an account, "
, anchor ! [href "/_register"] << "click here to get one." ]
loginUserForm :: String -> Params -> Web Response
loginUserForm page params =
addCookie (60 * 10) (mkCookie "destination" $ substitute " " "%20" $ fromMaybe "/" $ pReferer params) >>
loginUserForm' page params
loginUserForm' :: String -> Params -> Web Response
loginUserForm' page params =
formattedPage (defaultPageLayout { pgShowPageTools = False, pgTabs = [], pgTitle = "Login" }) page params loginForm
loginUser :: String -> Params -> Web Response
loginUser page params = do
let uname = pUsername params
let pword = pPassword params
let destination = pDestination params
cfg <- query GetConfig
let passwordHash = showDigest $ sha512 $ L.fromString $ passwordSalt cfg ++ pword
allowed <- query $ AuthUser uname passwordHash
if allowed
then do
key <- update $ NewSession (SessionData uname)
addCookie sessionTime (mkCookie "sid" (show key))
addCookie 0 (mkCookie "destination" "") -- remove unneeded destination cookie
seeOther destination $ toResponse $ p << ("Welcome, " ++ uname)
else
loginUserForm' page (params { pMessages = "Authentication failed." : pMessages params })
logoutUser :: String -> Params -> Web Response
logoutUser _ params = do
let key = pSessionKey params
let destination = substitute " " "%20" $ fromMaybe "/" $ pReferer params
case key of
Just k -> do
update $ DelSession k
addCookie 0 (mkCookie "sid" "") -- make cookie expire immediately, effectively deleting it
Nothing -> return ()
seeOther destination $ toResponse "You have been logged out."
registerForm :: Web Html
registerForm = do
cfg <- query GetConfig
let accessQ = case accessQuestion cfg of
Nothing -> noHtml
Just (prompt, _) -> label << prompt +++ br +++
X.password "accessCode" ! [size "15"] +++ br
return $ gui "" ! [identifier "loginForm"] << fieldset <<
[ accessQ
, label << "Username (at least 3 letters or digits):", br
, textfield "username" ! [size "20"], stringToHtml " ", br
, label << "Email (optional, will not be displayed on the Wiki):", br
, textfield "email" ! [size "20"], br
, textfield "fullname" ! [size "20", theclass "req"]
, label << "Password (at least 6 characters, including at least one non-letter):", br
, X.password "password" ! [size "20"], stringToHtml " ", br
, label << "Confirm Password:", br, X.password "password2" ! [size "20"], stringToHtml " ", br
, submit "register" "Register" ]
registerUserForm :: String -> Params -> Web Response
registerUserForm _ params =
addCookie (60 * 10) (mkCookie "destination" $ substitute " " "%20" $ fromMaybe "/" $ pReferer params) >>
registerForm >>=
formattedPage (defaultPageLayout { pgShowPageTools = False, pgTabs = [], pgTitle = "Register for an account" }) "_register" params
registerUser :: String -> Params -> Web Response
registerUser _ params = do
let page = "_register"
regForm <- registerForm
let isValidUsername u = length u >= 3 && all isAlphaNum u
let isValidPassword pw = length pw >= 6 && not (all isAlpha pw)
let accessCode = pAccessCode params
let uname = pUsername params
let pword = pPassword params
let pword2 = pPassword2 params
let email = pEmail params
let fakeField = pFullName params
taken <- query $ IsUser uname
cfg <- query GetConfig
let isValidAccessCode = case accessQuestion cfg of
Nothing -> True
Just (_, answers) -> accessCode `elem` answers
let isValidEmail e = length (filter (=='@') e) == 1
let errors = validate [ (taken, "Sorry, that username is already taken.")
, (not isValidAccessCode, "Incorrect response to access prompt.")
, (not (isValidUsername uname), "Username must be at least 3 charcaters, all letters or digits.")
, (not (isValidPassword pword), "Password must be at least 6 characters, with at least one non-letter.")
, (not (null email) && not (isValidEmail email), "Email address appears invalid.")
, (pword /= pword2, "Password does not match confirmation.")
, (not (null fakeField), "You do not seem human enough.") ] -- fakeField is hidden in CSS (honeypot)
if null errors
then do
let passwordHash = showDigest $ sha512 $ L.fromString $ passwordSalt cfg ++ pword
update $ AddUser uname (User { uUsername = uname, uPassword = passwordHash, uEmail = email })
loginUser "/" (params { pUsername = uname, pPassword = pword, pEmail = email })
else formattedPage (defaultPageLayout { pgShowPageTools = False, pgTabs = [], pgTitle = "Register for an account" })
page (params { pMessages = errors }) regForm
showHighlightedSource :: String -> Params -> Web Response
showHighlightedSource file params = do
contents <- rawContents file params
case contents of
Just source -> let lang' = head $ languagesByExtension $ takeExtension file
in case highlightAs lang' (filter (/='\r') source) of
Left _ -> noHandle
Right res -> formattedPage defaultPageLayout file params $ formatAsXHtml [OptNumberLines] lang' res
Nothing -> noHandle
defaultRespOptions :: WriterOptions
defaultRespOptions = defaultWriterOptions { writerStandalone = True, writerWrapText = True }
respondLaTeX :: String -> Pandoc -> Web Response
respondLaTeX page = ok . setContentType "application/x-latex" . setFilename (page ++ ".tex") . toResponse .
writeLaTeX (defaultRespOptions {writerHeader = defaultLaTeXHeader})
respondConTeXt :: String -> Pandoc -> Web Response
respondConTeXt page = ok . setContentType "application/x-context" . setFilename (page ++ ".tex") . toResponse .
writeConTeXt (defaultRespOptions {writerHeader = defaultConTeXtHeader})
respondRTF :: String -> Pandoc -> Web Response
respondRTF page = ok . setContentType "application/rtf" . setFilename (page ++ ".rtf") . toResponse .
writeRTF (defaultRespOptions {writerHeader = defaultRTFHeader})
respondRST :: String -> Pandoc -> Web Response
respondRST _ = ok . setContentType "text/plain" . toResponse .
writeRST (defaultRespOptions {writerHeader = "", writerReferenceLinks = True})
respondMan :: String -> Pandoc -> Web Response
respondMan _ = ok . setContentType "text/plain" . toResponse .
writeMan (defaultRespOptions {writerHeader = ""})
respondS5 :: String -> Pandoc -> Web Response
respondS5 _ = ok . toResponse . writeS5 (defaultRespOptions {writerHeader = defaultS5Header,
writerS5 = True, writerIncremental = True})
respondTexinfo :: String -> Pandoc -> Web Response
respondTexinfo page = ok . setContentType "application/x-texinfo" . setFilename (page ++ ".texi") . toResponse .
writeTexinfo (defaultRespOptions {writerHeader = ""})
respondDocbook :: String -> Pandoc -> Web Response
respondDocbook page = ok . setContentType "application/docbook+xml" . setFilename (page ++ ".xml") . toResponse .
writeDocbook (defaultRespOptions {writerHeader = defaultDocbookHeader})
respondMediaWiki :: String -> Pandoc -> Web Response
respondMediaWiki _ = ok . setContentType "text/plain" . toResponse .
writeMediaWiki (defaultRespOptions {writerHeader = ""})
respondODT :: String -> Pandoc -> Web Response
respondODT page doc = do
cfg <- query GetConfig
let openDoc = writeOpenDocument (defaultRespOptions {writerHeader = defaultOpenDocumentHeader}) doc
contents <- liftIO $ withTempDir "gitit-temp-odt" $ \tempdir -> do
let tempfile = tempdir </> page <.> "odt"
saveOpenDocumentAsODT tempfile (repositoryPath cfg) openDoc
B.readFile tempfile
ok $ setContentType "application/vnd.oasis.opendocument.text" $ setFilename (page ++ ".odt") $ (toResponse noHtml) {rsBody = contents}
exportFormats :: [(String, String -> Pandoc -> Web Response)] -- (description, writer)
exportFormats = [ ("LaTeX", respondLaTeX)
, ("ConTeXt", respondConTeXt)
, ("Texinfo", respondTexinfo)
, ("reST", respondRST)
, ("MediaWiki", respondMediaWiki)
, ("man", respondMan)
, ("DocBook", respondDocbook)
, ("S5", respondS5)
, ("ODT", respondODT)
, ("RTF", respondRTF) ]
exportBox :: String -> Params -> Html
exportBox page params | isPage page =
gui (urlForPage page) ! [identifier "exportbox"] <<
[ textfield "revision" ! [thestyle "display: none;", value (pRevision params)]
, select ! [name "format"] <<
map ((\f -> option ! [value f] << f) . fst) exportFormats
, submit "export" "Export" ]
exportBox _ _ = noHtml
rawContents :: String -> Params -> Web (Maybe String)
rawContents file params = do
let revision = pRevision params `orIfNull` "HEAD"
gitCatFile revision file
textToPandoc :: String -> Pandoc
textToPandoc = readMarkdown (defaultParserState { stateSanitizeHTML = True, stateSmart = True }) .
filter (/= '\r')
pageAsPandoc :: String -> Params -> Web (Maybe Pandoc)
pageAsPandoc page params = do
mDoc <- rawContents (pathForPage page) params >>= (return . liftM textToPandoc)
return $ case mDoc of
Nothing -> Nothing
Just (Pandoc _ blocks) -> Just $ Pandoc (Meta [Str page] [] []) blocks
exportPage :: String -> Params -> Web Response
exportPage page params = do
let format = pFormat params
mDoc <- pageAsPandoc page params
case mDoc of
Nothing -> error $ "Unable to retrieve page contents."
Just doc -> case lookup format exportFormats of
Nothing -> error $ "Unknown export format: " ++ format
Just writer -> writer page doc
-- | Perform a function in a temporary directory and clean up.
withTempDir :: FilePath -> (FilePath -> IO a) -> IO a
withTempDir baseName = bracket (createTempDir 0 baseName) (removeDirectoryRecursive)
-- | Create a temporary directory with a unique name.
createTempDir :: Integer -> FilePath -> IO FilePath
createTempDir num baseName = do
sysTempDir <- catch getTemporaryDirectory (\_ -> return ".")
let dirName = sysTempDir </> baseName <.> show num
catch (createDirectory dirName >> return dirName) $
\e -> if isAlreadyExistsError e
then createTempDir (num + 1) baseName
else ioError e