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{-# LANGUAGE ScopedTypeVariables #-}
{-
Copyright (C) 2008-9 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
-}
{- Handlers for wiki functions.
-}
module Network.Gitit.Handlers (
handleAny
, debugHandler
, randomPage
, discussPage
, createPage
, showActivity
, goToPage
, searchResults
, uploadForm
, uploadFile
, indexPage
, categoryPage
, categoryListPage
, preview
, showRawPage
, showFileAsText
, showPageHistory
, showFileHistory
, showPage
, showPageDiff
, showFileDiff
, exportPage
, updatePage
, editPage
, deletePage
, confirmDelete
, showHighlightedSource
, expireCache
, feedHandler
)
where
import Safe
import Network.Gitit.Server
import Network.Gitit.Framework
import Network.Gitit.Layout
import Network.Gitit.Types
import Network.Gitit.Feed (filestoreToXmlFeed, FeedConfig(..))
import Network.Gitit.Util (orIfNull)
import Network.Gitit.Cache (expireCachedFile, lookupCache, cacheContents)
import Network.Gitit.ContentTransformer (showRawPage, showFileAsText, showPage,
exportPage, showHighlightedSource, preview, applyPreCommitPlugins)
import Network.Gitit.Page (readCategories)
import Control.Exception (throwIO, catch, try)
import System.Time
import System.FilePath
import Prelude hiding (catch)
import Network.Gitit.State
import Text.XHtml hiding ( (</>), dir, method, password, rev )
import qualified Text.XHtml as X ( method )
import Data.List (intersperse, nub, sortBy, find, isPrefixOf, inits, sort)
import Data.Maybe (fromMaybe, mapMaybe, isJust, catMaybes)
import Data.Ord (comparing)
import Data.Char (toLower, isSpace)
import Control.Monad.Reader
import qualified Data.ByteString.Lazy as B
import qualified Data.ByteString as S
import Network.HTTP (urlEncodeVars)
import Data.Time (getCurrentTime, addUTCTime)
import Data.FileStore
import System.Log.Logger (logM, Priority(..))
handleAny :: Handler
handleAny = uriRest $ \uri ->
let path' = uriPath uri
in do fs <- getFileStore
mimetype <- getMimeTypeForExtension
(takeExtension path')
res <- liftIO $ try
(retrieve fs path' Nothing :: IO B.ByteString)
case res of
Right contents -> ignoreFilters >> -- don't compress
(ok $ setContentType mimetype $
(toResponse noHtml) {rsBody = contents})
-- ugly hack
Left NotFound -> mzero
Left e -> error (show e)
debugHandler :: Handler
debugHandler = withData $ \(params :: Params) -> do
req <- askRq
liftIO $ logM "gitit" DEBUG (show req)
page <- getPage
liftIO $ logM "gitit" DEBUG $ "Page = '" ++ page ++ "'\n" ++
show params
mzero
randomPage :: Handler
randomPage = do
fs <- getFileStore
files <- liftIO $ index fs
let pages = map dropExtension $
filter (\f -> isPageFile f && not (isDiscussPageFile f)) files
base' <- getWikiBase
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 (base' ++ urlForPage newPage) $ toResponse $
p << "Redirecting to a random page"
discussPage :: Handler
discussPage = do
page <- getPage
base' <- getWikiBase
seeOther (base' ++ urlForPage (if isDiscussPage page then page else ('@':page))) $
toResponse "Redirecting to discussion page"
createPage :: Handler
createPage = do
page <- getPage
base' <- getWikiBase
case page of
('_':_) -> mzero -- don't allow creation of _index, etc.
_ -> formattedPage defaultPageLayout{
pgPageName = page
, pgTabs = []
, pgTitle = "Create " ++ page ++ "?"
} $
p << [ stringToHtml ("There is no page '" ++ page ++
"'. You may create the page by "),
anchor ! [href $ base' ++ "/_edit" ++ urlForPage page] <<
"clicking here." ]
uploadForm :: Handler
uploadForm = withData $ \(params :: Params) -> do
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{
pgMessages = pMessages params,
pgScripts = ["uploadForm.js"],
pgShowPageTools = False,
pgTabs = [],
pgTitle = "Upload a file"} upForm
uploadFile :: Handler
uploadFile = withData $ \(params :: Params) -> do
let origPath = pFilename params
let filePath = pFilePath params
let wikiname = normalise
$ dropWhile (=='/')
$ pWikiname params `orIfNull` takeFileName origPath
let logMsg = pLogMsg params
cfg <- getConfig
mbUser <- getLoggedInUser
(user, email) <- case mbUser of
Nothing -> return ("Anonymous", "")
Just u -> return (uUsername u, uEmail u)
let overwrite = pOverwrite params
fs <- getFileStore
exists <- liftIO $ catch (latest fs wikiname >> return True) $ \e ->
if e == NotFound
then return False
else throwIO e >> return True
let inStaticDir = staticDir cfg `isPrefixOf` (repositoryPath cfg </> wikiname)
let inTemplatesDir = templatesDir cfg `isPrefixOf` (repositoryPath cfg </> wikiname)
let dirs' = splitDirectories $ takeDirectory wikiname
let imageExtensions = [".png", ".jpg", ".gif"]
let errors = validate
[ (null . filter (not . isSpace) $ logMsg,
"Description cannot be empty.")
, (".." `elem` dirs', "Wikiname cannot contain '..'")
, (null origPath, "File not found.")
, (inStaticDir, "Destination is inside static directory.")
, (inTemplatesDir, "Destination is inside templates directory.")
, (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.")
, (isPageFile wikiname,
"This file extension is reserved for wiki pages.")
]
if null errors
then do
expireCachedFile wikiname `mplus` return ()
fileContents <- liftIO $ B.readFile filePath
let len = B.length fileContents
liftIO $ save fs wikiname (Author user email) logMsg fileContents
let contents = thediv <<
[ h2 << ("Uploaded " ++ show len ++ " 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 ++ ")") ]
formattedPage defaultPageLayout{
pgMessages = pMessages params,
pgShowPageTools = False,
pgTabs = [],
pgTitle = "Upload successful"}
contents
else withMessages errors uploadForm
goToPage :: Handler
goToPage = withData $ \(params :: Params) -> do
let gotopage = pGotoPage params
fs <- getFileStore
allPageNames <- liftM (map dropExtension . filter isPageFile) $
liftIO $ index fs
let findPage f = find f allPageNames
let exactMatch f = gotopage == f
let insensitiveMatch f = (map toLower gotopage) == (map toLower f)
let prefixMatch f = (map toLower gotopage) `isPrefixOf` (map toLower f)
base' <- getWikiBase
case findPage exactMatch of
Just m -> seeOther (base' ++ urlForPage m) $ toResponse
"Redirecting to exact match"
Nothing -> case findPage insensitiveMatch of
Just m -> seeOther (base' ++ urlForPage m) $ toResponse
"Redirecting to case-insensitive match"
Nothing -> case findPage prefixMatch of
Just m -> seeOther (base' ++ urlForPage m) $
toResponse $ "Redirecting" ++
" to partial match"
Nothing -> searchResults
searchResults :: Handler
searchResults = withData $ \(params :: Params) -> do
let patterns = pPatterns params `orIfNull` [pGotoPage params]
fs <- getFileStore
matchLines <- if null patterns
then return []
else liftIO $ catch (search fs SearchQuery{
queryPatterns = patterns
, queryWholeWords = True
, queryMatchAll = True
, queryIgnoreCase = True })
-- catch error, because newer versions of git
-- return 1 on no match, and filestore <=0.3.3
-- doesn't handle this properly:
(\(_ :: FileStoreError) -> return [])
let contentMatches = map matchResourceName matchLines
allPages <- liftM (filter isPageFile) $ liftIO $ index fs
let slashToSpace = map (\c -> if c == '/' then ' ' else c)
let inPageName pageName' x = x `elem` (words $ slashToSpace $ dropExtension pageName')
let matchesPatterns pageName' = not (null patterns) &&
all (inPageName (map toLower pageName')) (map (map toLower) patterns)
let pageNameMatches = filter matchesPatterns allPages
let allMatchedFiles = nub $ filter isPageFile contentMatches ++
pageNameMatches
let matchesInFile f = mapMaybe (\x -> if matchResourceName x == f
then Just (matchLine x)
else Nothing) matchLines
let matches = map (\f -> (f, matchesInFile f)) allMatchedFiles
let relevance (f, ms) = length ms + if f `elem` pageNameMatches
then 100
else 0
let preamble = if null patterns
then h3 << ["Please enter a search term."]
else h3 << [ stringToHtml (show (length matches) ++ " matches found for ")
, thespan ! [identifier "pattern"] << unwords patterns]
base' <- getWikiBase
let toMatchListItem (file, contents) = li <<
[ anchor ! [href $ base' ++ urlForPage (dropExtension file)] << dropExtension file
, stringToHtml (" (" ++ show (length contents) ++ " matching lines)")
, stringToHtml " "
, anchor ! [href "#", theclass "showmatch",
thestyle "display: none;"] << if length contents > 0
then "[show matches]"
else ""
, pre ! [theclass "matches"] << unlines contents]
let htmlMatches = preamble +++
olist << map toMatchListItem
(reverse $ sortBy (comparing relevance) matches)
formattedPage defaultPageLayout{
pgMessages = pMessages params,
pgShowPageTools = False,
pgTabs = [],
pgScripts = ["search.js"],
pgTitle = "Search results"}
htmlMatches
showPageHistory :: Handler
showPageHistory = withData $ \(params :: Params) -> do
page <- getPage
showHistory (pathForPage page) page params
showFileHistory :: Handler
showFileHistory = withData $ \(params :: Params) -> do
file <- getPage
showHistory file file params
showHistory :: String -> String -> Params -> Handler
showHistory file page params = do
fs <- getFileStore
hist <- liftIO $ history fs [file] (TimeRange Nothing Nothing)
(Just $ pLimit params)
base' <- getWikiBase
let versionToHtml rev pos = li ! [theclass "difflink", intAttr "order" pos,
strAttr "revision" (revId rev),
strAttr "diffurl" (base' ++ "/_diff/" ++ page)] <<
[ thespan ! [theclass "date"] << (show $ revDateTime rev)
, stringToHtml " ("
, thespan ! [theclass "author"] << anchor ! [href $ base' ++ "/_activity?" ++
urlEncodeVars [("forUser", authorName $ revAuthor rev)]] <<
(authorName $ revAuthor rev)
, stringToHtml "): "
, anchor ! [href (base' ++ urlForPage page ++ "?revision=" ++ revId rev)] <<
thespan ! [theclass "subject"] << revDescription rev
, noscript <<
([ stringToHtml " [compare with "
, anchor ! [href $ base' ++ "/_diff" ++ urlForPage page ++ "?to=" ++ revId rev] <<
"previous" ] ++
(if pos /= 1
then [ primHtmlChar "nbsp"
, primHtmlChar "bull"
, primHtmlChar "nbsp"
, anchor ! [href $ base' ++ "/_diff" ++ urlForPage page ++ "?from=" ++
revId rev] << "current"
]
else []) ++
[stringToHtml "]"])
]
let contents = if null hist
then noHtml
else ulist ! [theclass "history"] <<
zipWith versionToHtml hist
[length hist, (length hist - 1)..1]
let more = if length hist == pLimit params
then anchor ! [href $ base' ++ "/_history" ++ urlForPage page
++ "?limit=" ++ show (pLimit params + 100)] <<
"Show more..."
else noHtml
let tabs = if file == page -- source file, not wiki page
then [ViewTab,HistoryTab]
else pgTabs defaultPageLayout
formattedPage defaultPageLayout{
pgPageName = page,
pgMessages = pMessages params,
pgScripts = ["dragdiff.js"],
pgTabs = tabs,
pgSelectedTab = HistoryTab,
pgTitle = ("Changes to " ++ page)
} $ contents +++ more
showActivity :: Handler
showActivity = withData $ \(params :: Params) -> do
currTime <- liftIO getCurrentTime
let oneMonthAgo = addUTCTime (-60 * 60 * 24 * 30) currTime
let since = case pSince params of
Nothing -> Just oneMonthAgo
Just t -> Just t
let forUser = pForUser params
fs <- getFileStore
hist <- liftIO $ history fs [] (TimeRange since Nothing)
(Just $ pLimit params)
let hist' = case forUser of
Nothing -> hist
Just u -> filter (\r -> authorName (revAuthor r) == u) hist
let fileFromChange (Added f) = f
fileFromChange (Modified f) = f
fileFromChange (Deleted f) = f
let dropDotPage file = if isPageFile file
then dropExtension file
else file
base' <- getWikiBase
let fileAnchor revis file =
anchor ! [href $ base' ++ "/_diff" ++ urlForPage file ++ "?to=" ++ revis] << file
let filesFor changes revis = intersperse (primHtmlChar "nbsp") $
map (fileAnchor revis . dropDotPage . fileFromChange) changes
let heading = h1 << ("Recent changes by " ++ fromMaybe "all users" forUser)
let revToListItem rev = li <<
[ thespan ! [theclass "date"] << (show $ revDateTime rev)
, stringToHtml " ("
, thespan ! [theclass "author"] <<
anchor ! [href $ base' ++ "/_activity?" ++
urlEncodeVars [("forUser", authorName $ revAuthor rev)]] <<
(authorName $ revAuthor rev)
, stringToHtml "): "
, thespan ! [theclass "subject"] << revDescription rev
, stringToHtml " ("
, thespan ! [theclass "files"] << filesFor (revChanges rev) (revId rev)
, stringToHtml ")"
]
let contents = ulist ! [theclass "history"] << map revToListItem hist'
formattedPage defaultPageLayout{
pgMessages = pMessages params,
pgShowPageTools = False,
pgTabs = [],
pgTitle = "Recent changes"
} (heading +++ contents)
showPageDiff :: Handler
showPageDiff = withData $ \(params :: Params) -> do
page <- getPage
showDiff (pathForPage page) page params
showFileDiff :: Handler
showFileDiff = withData $ \(params :: Params) -> do
page <- getPage
showDiff page page params
showDiff :: String -> String -> Params -> Handler
showDiff file page params = do
let from = pFrom params
let to = pTo params
-- 'to' or 'from' must be given
when (from == Nothing && to == Nothing) mzero
fs <- getFileStore
-- if 'to' is not specified, defaults to current revision
-- if 'from' is not specified, defaults to revision immediately before 'to'
from' <- case (from, to) of
(Just _, _) -> return from
(Nothing, Nothing) -> return from
(Nothing, Just t) -> do
pageHist <- liftIO $ history fs [file]
(TimeRange Nothing Nothing)
let (_, upto) = break (\r -> idsMatch fs (revId r) t)
pageHist
return $ if length upto >= 2
-- immediately preceding revision
then Just $ revId $ upto !! 1
else Nothing
result' <- liftIO $ try $ getDiff fs file from' to
case result' of
Left NotFound -> mzero
Left e -> liftIO $ throwIO e
Right htmlDiff -> formattedPage defaultPageLayout{
pgPageName = page,
pgRevision = from',
pgMessages = pMessages params,
pgTabs = DiffTab :
pgTabs defaultPageLayout,
pgSelectedTab = DiffTab
}
htmlDiff
getDiff :: FileStore -> FilePath -> Maybe RevisionId -> Maybe RevisionId
-> IO Html
getDiff fs file from to = do
rawDiff <- diff fs file from to
let diffLineToHtml (B, xs) = thespan << unlines xs
diffLineToHtml (F, xs) = thespan ! [theclass "deleted"] << unlines xs
diffLineToHtml (S, xs) = thespan ! [theclass "added"] << unlines xs
return $ h2 ! [theclass "revision"] <<
("Changes from " ++ fromMaybe "beginning" from ++
" to " ++ fromMaybe "current" to) +++
pre ! [theclass "diff"] << map diffLineToHtml rawDiff
editPage :: Handler
editPage = withData editPage'
editPage' :: Params -> Handler
editPage' params = do
let rev = pRevision params -- if this is set, we're doing a revert
fs <- getFileStore
page <- getPage
let getRevisionAndText = catch
(do c <- liftIO $ retrieve fs (pathForPage page) rev
-- even if pRevision is set, we return revId of latest
-- saved version (because we're doing a revert and
-- we don't want gitit to merge the changes with the
-- latest version)
r <- liftIO $ latest fs (pathForPage page) >>= revision fs
return (Just $ revId r, c))
(\e -> if e == NotFound
then return (Nothing, "")
else throwIO e)
(mbRev, raw) <- case pEditedText params of
Nothing -> liftIO getRevisionAndText
Just t -> let r = if null (pSHA1 params)
then Nothing
else Just (pSHA1 params)
in return (r, t)
let messages = pMessages params
let logMsg = pLogMsg params
let sha1Box = case mbRev of
Just r -> textfield "sha1" ! [thestyle "display: none",
value r]
Nothing -> noHtml
let readonly = if isJust (pRevision params)
-- disable editing of text box if it's a revert
then [strAttr "readonly" "yes",
strAttr "style" "color: gray"]
else []
base' <- getWikiBase
cfg <- getConfig
let editForm = gui (base' ++ urlForPage page) ! [identifier "editform"] <<
[ sha1Box
, textarea ! (readonly ++ [cols "80", name "editedText",
identifier "editedText"]) << raw
, br
, label << "Description of changes:"
, br
, textfield "logMsg" ! (readonly ++ [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
]
let pgScripts' = ["preview.js"]
let pgScripts'' = case mathMethod cfg of
JsMathScript -> "jsMath/easy/load.js" : pgScripts'
MathML -> "MathMLinHTML.js" : pgScripts'
_ -> pgScripts'
formattedPage defaultPageLayout{
pgPageName = page,
pgMessages = messages,
pgRevision = rev,
pgShowPageTools = False,
pgShowSiteNav = False,
pgMarkupHelp = Just $ markupHelp cfg,
pgSelectedTab = EditTab,
pgScripts = pgScripts'',
pgTitle = ("Editing " ++ page)
} editForm
confirmDelete :: Handler
confirmDelete = do
page <- getPage
fs <- getFileStore
-- determine whether there is a corresponding page, and if not whether there
-- is a corresponding file
pageTest <- liftIO $ try $ latest fs (pathForPage page)
fileToDelete <- case pageTest of
Right _ -> return $ pathForPage page -- a page
Left NotFound -> do
fileTest <- liftIO $ try $ latest fs page
case fileTest of
Right _ -> return page -- a source file
Left NotFound -> return ""
Left e -> fail (show e)
Left e -> fail (show e)
let confirmForm = gui "" <<
[ p << "Are you sure you want to delete this page?"
, input ! [thetype "text", name "filetodelete",
strAttr "style" "display: none;", value fileToDelete]
, submit "confirm" "Yes, delete it!"
, stringToHtml " "
, submit "cancel" "No, keep it!"
, br ]
formattedPage defaultPageLayout{ pgTitle = "Delete " ++ page ++ "?" } $
if null fileToDelete
then ulist ! [theclass "messages"] << li <<
"There is no file or page by that name."
else confirmForm
deletePage :: Handler
deletePage = withData $ \(params :: Params) -> do
page <- getPage
let file = pFileToDelete params
mbUser <- getLoggedInUser
(user, email) <- case mbUser of
Nothing -> return ("Anonymous", "")
Just u -> return (uUsername u, uEmail u)
let author = Author user email
let descrip = "Deleted using web interface."
base' <- getWikiBase
if pConfirm params && (file == page || file == page <.> "page")
then do
fs <- getFileStore
liftIO $ delete fs file author descrip
seeOther (base' ++ "/") $ toResponse $ p << "File deleted"
else seeOther (base' ++ urlForPage page) $ toResponse $ p << "Not deleted"
updatePage :: Handler
updatePage = withData $ \(params :: Params) -> do
page <- getPage
cfg <- getConfig
mbUser <- getLoggedInUser
(user, email) <- case mbUser of
Nothing -> return ("Anonymous", "")
Just u -> return (uUsername u, uEmail u)
editedText <- case pEditedText params of
Nothing -> error "No body text in POST request"
Just b -> applyPreCommitPlugins b
let logMsg = pLogMsg params `orIfNull` defaultSummary cfg
let oldSHA1 = pSHA1 params
fs <- getFileStore
base' <- getWikiBase
if null . filter (not . isSpace) $ logMsg
then withMessages ["Description cannot be empty."] editPage
else do
when (length editedText > fromIntegral (maxPageSize cfg)) $
error "Page exceeds maximum size."
-- check SHA1 in case page has been modified, merge
modifyRes <- if null oldSHA1
then liftIO $ create fs (pathForPage page)
(Author user email) logMsg editedText >>
return (Right ())
else do
expireCachedFile (pathForPage page) `mplus` return ()
liftIO $ catch (modify fs (pathForPage page)
oldSHA1 (Author user email) logMsg
editedText)
(\e -> if e == Unchanged
then return (Right ())
else throwIO e)
case modifyRes of
Right () -> seeOther (base' ++ urlForPage page) $ toResponse $ p << "Page updated"
Left (MergeInfo mergedWithRev conflicts mergedText) -> do
let mergeMsg = "The page has been edited since you checked it out. " ++
"Changes from revision " ++ revId mergedWithRev ++
" have been merged into your edits below. " ++
if conflicts
then "Please resolve conflicts and Save."
else "Please review and Save."
editPage' $
params{ pEditedText = Just mergedText,
pSHA1 = revId mergedWithRev,
pMessages = [mergeMsg] }
indexPage :: Handler
indexPage = do
path' <- getPath
base' <- getWikiBase
let prefix' = if null path' then "" else path' ++ "/"
fs <- getFileStore
listing <- liftIO $ directory fs prefix'
let isDiscussionPage (FSFile f) = isDiscussPageFile f
isDiscussionPage (FSDirectory _) = False
let prunedListing = filter (not . isDiscussionPage) listing
let htmlIndex = fileListToHtml base' prefix' prunedListing
formattedPage defaultPageLayout{
pgPageName = prefix',
pgShowPageTools = False,
pgTabs = [],
pgScripts = [],
pgTitle = "Contents"} htmlIndex
fileListToHtml :: String -> String -> [Resource] -> Html
fileListToHtml base' prefix files =
let fileLink (FSFile f) | isPageFile f =
li ! [theclass "page" ] <<
anchor ! [href $ base' ++ urlForPage (prefix ++ dropExtension f)] <<
dropExtension f
fileLink (FSFile f) =
li ! [theclass "upload"] << anchor ! [href $ base' ++ urlForPage (prefix ++ f)] << f
fileLink (FSDirectory f) =
li ! [theclass "folder"] <<
anchor ! [href $ base' ++ urlForPage (prefix ++ f) ++ "/"] << f
updirs = drop 1 $ inits $ splitPath $ '/' : prefix
uplink = foldr (\d accum ->
concatHtml [ anchor ! [theclass "updir",
href $ if length d <= 1
then base' ++ "/_index"
else base' ++
urlForPage (joinPath $ drop 1 d)] <<
lastNote "fileListToHtml" d, accum]) noHtml updirs
in uplink +++ ulist ! [theclass "index"] << map fileLink files
-- NOTE: The current implementation of categoryPage does not go via the
-- filestore abstraction. That is bad, but can only be fixed if we add
-- more sophisticated searching options to filestore.
categoryPage :: Handler
categoryPage = do
category <- getPath
cfg <- getConfig
let repoPath = repositoryPath cfg
let categoryDescription = "Category: " ++ category
fs <- getFileStore
files <- liftIO $ index fs
let pages = filter (\f -> isPageFile f && not (isDiscussPageFile f)) files
matches <- liftM catMaybes $
forM pages $ \f -> do
categories <- liftIO $ readCategories $ repoPath </> f
return $ if category `elem` categories
then Just $ dropExtension f
else Nothing
base' <- getWikiBase
let toMatchListItem file = li <<
[ anchor ! [href $ base' ++ urlForPage (dropExtension file)] << dropExtension file ]
let htmlMatches = ulist << map toMatchListItem matches
formattedPage defaultPageLayout{
pgPageName = categoryDescription,
pgShowPageTools = False,
pgTabs = [],
pgScripts = ["search.js"],
pgTitle = categoryDescription }
htmlMatches
categoryListPage :: Handler
categoryListPage = do
cfg <- getConfig
let repoPath = repositoryPath cfg
fs <- getFileStore
files <- liftIO $ index fs
let pages = filter (\f -> isPageFile f && not (isDiscussPageFile f)) files
categories <- liftIO $ liftM (nub . sort . concat) $ forM pages $ \f ->
readCategories (repoPath </> f)
base' <- getWikiBase
let toCatLink ctg = li <<
[ anchor ! [href $ base' ++ "/_category" ++ urlForPage ctg] << ctg ]
let htmlMatches = ulist << map toCatLink categories
formattedPage defaultPageLayout{
pgPageName = "Categories",
pgShowPageTools = False,
pgTabs = [],
pgScripts = ["search.js"],
pgTitle = "Categories" } htmlMatches
expireCache :: Handler
expireCache = do
page <- getPage
-- try it as a page first, then as an uploaded file
expireCachedFile (pathForPage page)
expireCachedFile page
ok $ toResponse ()
feedHandler :: Handler
feedHandler = do
cfg <- getConfig
when (not $ useFeed cfg) mzero
base' <- getWikiBase
feedBase <- if null (baseUrl cfg) -- if baseUrl blank, try to get it from Host header
then do
mbHost <- getHost
case mbHost of
Nothing -> error "Could not determine base URL"
Just hn -> return $ "http://" ++ hn ++ base'
else case baseUrl cfg ++ base' of
x@('h':'t':'t':'p':':':'/':'/':_) -> return x
y -> return $ "http://" ++ y
let fc = FeedConfig{
fcTitle = wikiTitle cfg
, fcBaseUrl = feedBase
, fcFeedDays = feedDays cfg }
path' <- getPath -- e.g. "foo/bar" if they hit /_feed/foo/bar
let file = (path' `orIfNull` "_site") <.> "feed"
let mbPath = if null path' then Nothing else Just path'
-- first, check for a cached version that is recent enough
now <- liftIO $ getClockTime
let isRecentEnough t = normalizeTimeDiff (diffClockTimes now t) <
normalizeTimeDiff (noTimeDiff{tdMin = fromIntegral $ feedRefreshTime cfg})
mbCached <- lookupCache file
case mbCached of
Just (modtime, contents) | isRecentEnough modtime -> do
let emptyResponse = setContentType "application/atom+xml; charset=utf-8" . toResponse $ ()
ok $ emptyResponse{rsBody = B.fromChunks [contents]}
_ -> do
fs <- getFileStore
resp' <- liftM toResponse $ liftIO (filestoreToXmlFeed fc fs mbPath)
cacheContents file $ S.concat $ B.toChunks $ rsBody resp'
ok . setContentType "application/atom+xml; charset=UTF-8" $ resp'
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