#!/usr/bin/perl # UseModWiki version 1.0 (September 12, 2003) # Copyright (C) 2000-2003 Clifford A. Adams # Copyright (C) 2002-2003 Sunir Shah # Based on the GPLed AtisWiki 0.3 (C) 1998 Markus Denker # # ...which was based on # the LGPLed CVWiki CVS-patches (C) 1997 Peter Merel # and The Original WikiWikiWeb (C) Ward Cunningham # (code reused with permission) # Email and ThinLine options by Jim Mahoney # # 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 package UseModWiki; use strict; local $| = 1; # Do not buffer output (localized for mod_perl) # Configuration/constant variables: use vars qw(@RcDays @HtmlPairs @HtmlSingle $TempDir $LockDir $DataDir $HtmlDir $UserDir $KeepDir $PageDir $InterFile $RcFile $RcOldFile $IndexFile $FullUrl $SiteName $HomePage $LogoUrl $RcDefault $IndentLimit $RecentTop $EditAllowed $UseDiff $UseSubpage $UseCache $RawHtml $SimpleLinks $NonEnglish $LogoLeft $KeepDays $HtmlTags $HtmlLinks $UseDiffLog $KeepMajor $KeepAuthor $FreeUpper $EmailNotify $SendMail $EmailFrom $FastGlob $EmbedWiki $ScriptTZ $BracketText $UseAmPm $UseConfig $UseIndex $UseLookup $RedirType $AdminPass $EditPass $UseHeadings $NetworkFile $BracketWiki $FreeLinks $WikiLinks $AdminDelete $FreeLinkPattern $RCName $RunCGI $ShowEdits $ThinLine $LinkPattern $InterLinkPattern $InterSitePattern $UrlProtocols $UrlPattern $ImageExtensions $RFCPattern $ISBNPattern $FS $FS1 $FS2 $FS3 $CookieName $SiteBase $StyleSheet $NotFoundPg $FooterNote $EditNote $MaxPost $NewText $NotifyDefault $HttpCharset $UserGotoBar $DeletedPage $ReplaceFile @ReplaceableFiles $TableSyntax $MetaKeywords $NamedAnchors $InterWikiMoniker $SiteDescription $RssLogoUrl $NumberDates $EarlyRules $LateRules $NewFS $KeepSize $SlashLinks $BGColor $UpperFirst $AdminBar $RepInterMap $DiffColor1 $DiffColor2 $ConfirmDel $MaskHosts $LockCrash $ConfigFile $HistoryEdit $OldThinLine @IsbnNames @IsbnPre @IsbnPost $EmailFile $FavIcon $RssDays $UserHeader $UserBody $StartUID $ParseParas $AuthorFooter $UseUpload $AllUpload $UploadDir $UploadUrl $LimitFileUrl $MaintTrimRc $SearchButton $EditNameLink $UseMetaWiki @ImageSites $BracketImg ); # Note: $NotifyDefault is kept because it was a config variable in 0.90 # Other global variables: use vars qw(%Page %Section %Text %InterSite %SaveUrl %SaveNumUrl %KeptRevisions %UserCookie %SetCookie %UserData %IndexHash %Translate %LinkIndex $InterSiteInit $SaveUrlIndex $SaveNumUrlIndex $MainPage $OpenPageName @KeptList @IndexList $IndexInit $TableMode $q $Now $UserID $TimeZoneOffset $ScriptName $BrowseCode $OtherCode $AnchoredLinkPattern @HeadingNumbers $TableOfContents $QuotedFullUrl $ConfigError $UploadPattern ); # == Configuration ===================================================== $DataDir = "wikidb"; # Main wiki directory $UseConfig = 1; # 1 = use config file, 0 = do not look for config $ConfigFile = "$DataDir/config"; # Configuration file # Default configuration (used if UseConfig is 0) $CookieName = "aibolab"; # Name for this wiki (for multi-wiki sites) $SiteName = "Labbook aibolab.science.uva.nl"; # Name of site (used for titles) $HomePage = "Labbook"; # Home page (change space to _) $RCName = "RecentChanges"; # Name of changes page (change space to _) $LogoUrl = ""; # URL for site logo ("" for no logo) $ENV{PATH} = "/usr/bin/"; # Path used to find "diff" $ScriptTZ = ""; # Local time zone ("" means do not print) $RcDefault = 30; # Default number of RecentChanges days @RcDays = qw(1 3 7 30 90); # Days for links on RecentChanges $KeepDays = 14; # Days to keep old revisions $SiteBase = ""; # Full URL for header $FullUrl = ""; # Set if the auto-detected URL is wrong $RedirType = 1; # 1 = CGI.pm, 2 = script, 3 = no redirect $AdminPass = ""; # Set to non-blank to enable password(s) $EditPass = ""; # Like AdminPass, but for editing only $StyleSheet = ""; # URL for CSS stylesheet (like "/wiki.css") $NotFoundPg = ""; # Page for not-found links ("" for blank pg) $EmailFrom = "aibolab"; # Text for "From: " field of email notes. $SendMail = "/usr/sbin/sendmail"; # Full path to sendmail executable $FooterNote = ""; # HTML for bottom of every page $EditNote = ""; # HTML notice above buttons on edit page $MaxPost = 1024 * 210; # Maximum 210K posts (about 200K for pages) $NewText = ""; # New page text ("" for default message) $HttpCharset = ""; # Charset for pages, like "iso-8859-2" $UserGotoBar = ""; # HTML added to end of goto bar $InterWikiMoniker = ''; # InterWiki moniker for this wiki. (for RSS) $SiteDescription = $SiteName; # Description of this wiki. (for RSS) $RssLogoUrl = ''; # Optional image for RSS feed $EarlyRules = ''; # Local syntax rules for wiki->html (evaled) $LateRules = ''; # Local syntax rules for wiki->html (evaled) $KeepSize = 0; # If non-zero, maximum size of keep file $BGColor = 'white'; # Background color ('' to disable) $DiffColor1 = '#ffffaf'; # Background color of old/deleted text $DiffColor2 = '#cfffcf'; # Background color of new/added text $FavIcon = ''; # URL of bookmark/favorites icon, or '' $RssDays = 7; # Default number of days in RSS feed $UserHeader = ''; # Optional HTML header additional content $UserBody = ''; # Optional tag additional content $StartUID = 1001; # Starting number for user IDs $UploadDir = ''; # Full path (like /foo/www/uploads) for files $UploadUrl = ''; # Full URL (like http://foo.com/uploads) @ImageSites = qw(); # Url prefixes of good image sites: ()=all # Major options: $UseSubpage = 1; # 1 = use subpages, 0 = do not use subpages $UseCache = 0; # 1 = cache HTML pages, 0 = generate every page $EditAllowed = 1; # 1 = editing allowed, 0 = read-only $RawHtml = 0; # 1 = allow tag, 0 = no raw HTML in pages $HtmlTags = 0; # 1 = "unsafe" HTML tags, 0 = only minimal tags $UseDiff = 1; # 1 = use diff features, 0 = do not use diff $FreeLinks = 1; # 1 = use [[word]] links, 0 = LinkPattern only $WikiLinks = 1; # 1 = use LinkPattern, 0 = use [[word]] only $AdminDelete = 1; # 1 = Admin only deletes, 0 = Editor can delete $RunCGI = 1; # 1 = Run script as CGI, 0 = Load but do not run $EmailNotify = 0; # 1 = use email notices, 0 = no email on changes $EmbedWiki = 0; # 1 = no headers/footers, 0 = normal wiki pages $DeletedPage = 'DeletedPage'; # 0 = disable, 'PageName' = tag to delete page $ReplaceFile = 'ReplaceFile'; # 0 = disable, 'PageName' = indicator tag @ReplaceableFiles = (); # List of allowed server files to replace $TableSyntax = 1; # 1 = wiki syntax tables, 0 = no table syntax $NewFS = 0; # 1 = new multibyte $FS, 0 = old $FS $UseUpload = 0; # 1 = allow uploads, 0 = no uploads # Minor options: $LogoLeft = 0; # 1 = logo on left, 0 = logo on right $RecentTop = 1; # 1 = recent on top, 0 = recent on bottom $UseDiffLog = 1; # 1 = save diffs to log, 0 = do not save diffs $KeepMajor = 1; # 1 = keep major rev, 0 = expire all revisions $KeepAuthor = 1; # 1 = keep author rev, 0 = expire all revisions $ShowEdits = 0; # 1 = show minor edits, 0 = hide edits by default $HtmlLinks = 0; # 1 = allow A HREF links, 0 = no raw HTML links $SimpleLinks = 0; # 1 = only letters, 0 = allow _ and numbers $NonEnglish = 0; # 1 = extra link chars, 0 = only A-Za-z chars $ThinLine = 0; # 1 = fancy
tags, 0 = classic wiki
$BracketText = 1; # 1 = allow [URL text], 0 = no link descriptions $UseAmPm = 1; # 1 = use am/pm in times, 0 = use 24-hour times $UseIndex = 0; # 1 = use index file, 0 = slow/reliable method $UseHeadings = 1; # 1 = allow = h1 text =, 0 = no header formatting $NetworkFile = 1; # 1 = allow remote file:, 0 = no file:// links $BracketWiki = 0; # 1 = [WikiLnk txt] link, 0 = no local descriptions $UseLookup = 1; # 1 = lookup host names, 0 = skip lookup (IP only) $FreeUpper = 1; # 1 = force upper case, 0 = do not force case $FastGlob = 1; # 1 = new faster code, 0 = old compatible code $MetaKeywords = 1; # 1 = Google-friendly, 0 = search-engine averse $NamedAnchors = 1; # 0 = no anchors, 1 = enable anchors, # 2 = enable but suppress display $SlashLinks = 0; # 1 = use script/action links, 0 = script?action $UpperFirst = 1; # 1 = free links start uppercase, 0 = no ucfirst $AdminBar = 1; # 1 = admins see admin links, 0 = no admin bar $RepInterMap = 0; # 1 = intermap is replacable, 0 = not replacable $ConfirmDel = 1; # 1 = delete link confirm page, 0 = immediate delete $MaskHosts = 0; # 1 = mask hosts/IPs, 0 = no masking $LockCrash = 0; # 1 = crash if lock stuck, 0 = auto clear locks $HistoryEdit = 0; # 1 = edit links on history page, 0 = no edit links $OldThinLine = 0; # 1 = old ==== thick line, 0 = ------ for thick line $NumberDates = 0; # 1 = 2003-6-17 dates, 0 = June 17, 2003 dates $ParseParas = 0; # 1 = new paragraph markup, 0 = old markup $AuthorFooter = 1; # 1 = show last author in footer, 0 = do not show $AllUpload = 0; # 1 = anyone can upload, 0 = only editor/admins $LimitFileUrl = 1; # 1 = limited use of file: URLs, 0 = no limits $MaintTrimRc = 0; # 1 = maintain action trims RC, 0 = only maintainrc $SearchButton = 0; # 1 = search button on page, 0 = old behavior $EditNameLink = 0; # 1 = edit links use name (CSS), 0 = '?' links $UseMetaWiki = 0; # 1 = add MetaWiki search links, 0 = no MW links $BracketImg = 1; # 1 = [url url.gif] becomes image link, 0 = no img # Names of sites. (The first entry is used for the number link.) @IsbnNames = ('bn.com', 'amazon.com', 'search'); # Full URL of each site before the ISBN @IsbnPre = ('http://shop.barnesandnoble.com/bookSearch/isbnInquiry.asp?isbn=', 'http://www.amazon.com/exec/obidos/ISBN=', 'http://www.pricescan.com/books/BookDetail.asp?isbn='); # Rest of URL of each site after the ISBN (usually '') @IsbnPost = ('', '', ''); # HTML tag lists, enabled if $HtmlTags is set. # Scripting is currently possible with these tags, # so they are *not* particularly "safe". # Tags that must be in ... pairs: @HtmlPairs = qw(b i u font big small sub sup h1 h2 h3 h4 h5 h6 cite code em s strike strong tt var div center blockquote ol ul dl table caption); # Single tags (that do not require a closing /tag) @HtmlSingle = qw(br p hr li dt dd tr td th); @HtmlPairs = (@HtmlPairs, @HtmlSingle); # All singles can also be pairs # == You should not have to change anything below this line. ============= $IndentLimit = 20; # Maximum depth of nested lists $PageDir = "$DataDir/page"; # Stores page data $HtmlDir = "$DataDir/html"; # Stores HTML versions $UserDir = "$DataDir/user"; # Stores user data $KeepDir = "$DataDir/keep"; # Stores kept (old) page data $TempDir = "$DataDir/temp"; # Temporary files and locks $LockDir = "$TempDir/lock"; # DB is locked if this exists $InterFile = "$DataDir/intermap"; # Interwiki site->url map $RcFile = "$DataDir/rclog"; # New RecentChanges logfile $RcOldFile = "$DataDir/oldrclog"; # Old RecentChanges logfile $IndexFile = "$DataDir/pageidx"; # List of all pages $EmailFile = "$DataDir/emails"; # Email notification lists if ($RepInterMap) { push @ReplaceableFiles, $InterFile; } # The "main" program, called at the end of this script file. sub DoWikiRequest { if ($UseConfig && (-f $ConfigFile)) { $ConfigError = ''; if (!do $ConfigFile) { # Some error occurred $ConfigError = $@; if ($ConfigError eq '') { # Unfortunately, if the last expr returns 0, one will get a false # error above. To remain compatible with existing installs the # wiki must not report an error unless there is error text in $@. # (Errors in "use strict" may not have error text.) # Uncomment the line below if you want to catch use strict errors. # $ConfigError = T('Unknown Error (no error text)'); } } } &InitLinkPatterns(); if (!&DoCacheBrowse()) { eval $BrowseCode; &InitRequest() or return; if (!&DoBrowseRequest()) { eval $OtherCode; &DoOtherRequest(); } } } # == Common and cache-browsing code ==================================== sub InitLinkPatterns { my ($UpperLetter, $LowerLetter, $AnyLetter, $LpA, $LpB, $QDelim); # Field separators are used in the URL-style patterns below. if ($NewFS) { $FS = "\x1e\xff\xfe\x1e"; # An unlikely sequence for any charset } else { $FS = "\xb3"; # The FS character is a superscript "3" } $FS1 = $FS . "1"; # The FS values are used to separate fields $FS2 = $FS . "2"; # in stored hashtables and other data structures. $FS3 = $FS . "3"; # The FS character is not allowed in user data. $UpperLetter = "[A-Z"; $LowerLetter = "[a-z"; $AnyLetter = "[A-Za-z"; if ($NonEnglish) { $UpperLetter .= "\xc0-\xde"; $LowerLetter .= "\xdf-\xff"; if ($NewFS) { $AnyLetter .= "\x80-\xff"; } else { $AnyLetter .= "\xc0-\xff"; } } if (!$SimpleLinks) { $AnyLetter .= "_0-9"; } $UpperLetter .= "]"; $LowerLetter .= "]"; $AnyLetter .= "]"; # Main link pattern: lowercase between uppercase, then anything $LpA = $UpperLetter . "+" . $LowerLetter . "+" . $UpperLetter . $AnyLetter . "*"; # Optional subpage link pattern: uppercase, lowercase, then anything $LpB = $UpperLetter . "+" . $LowerLetter . "+" . $AnyLetter . "*"; if ($UseSubpage) { # Loose pattern: If subpage is used, subpage may be simple name $LinkPattern = "((?:(?:$LpA)?\\/$LpB)|$LpA)"; # Strict pattern: both sides must be the main LinkPattern # $LinkPattern = "((?:(?:$LpA)?\\/)?$LpA)"; } else { $LinkPattern = "($LpA)"; } $QDelim = '(?:"")?'; # Optional quote delimiter (not in output) $AnchoredLinkPattern = $LinkPattern . '#(\\w+)' . $QDelim if $NamedAnchors; $LinkPattern .= $QDelim; # Inter-site convention: sites must start with uppercase letter # (Uppercase letter avoids confusion with URLs) $InterSitePattern = $UpperLetter . $AnyLetter . "+"; $InterLinkPattern = "((?:$InterSitePattern:[^\\]\\s\"<>$FS]+)$QDelim)"; if ($FreeLinks) { # Note: the - character must be first in $AnyLetter definition if ($NonEnglish) { if ($NewFS) { $AnyLetter = "[-,.()' _0-9A-Za-z\x80-\xff]"; } else { $AnyLetter = "[-,.()' _0-9A-Za-z\xc0-\xff]"; } } else { $AnyLetter = "[-,.()' _0-9A-Za-z]"; } } $FreeLinkPattern = "($AnyLetter+)"; if ($UseSubpage) { $FreeLinkPattern = "((?:(?:$AnyLetter+)?\\/)?$AnyLetter+)"; } $FreeLinkPattern .= $QDelim; # Url-style links are delimited by one of: # 1. Whitespace (kept in output) # 2. Left or right angle-bracket (< or >) (kept in output) # 3. Right square-bracket (]) (kept in output) # 4. A single double-quote (") (kept in output) # 5. A $FS (field separator) character (kept in output) # 6. A double double-quote ("") (removed from output) $UrlProtocols = "http|https|ftp|afs|news|nntp|mid|cid|mailto|wais|" . "prospero|telnet|gopher"; $UrlProtocols .= '|file' if ($NetworkFile || !$LimitFileUrl); $UrlPattern = "((?:(?:$UrlProtocols):[^\\]\\s\"<>$FS]+)$QDelim)"; $ImageExtensions = "(gif|jpg|png|bmp|jpeg)"; $RFCPattern = "RFC\\s?(\\d+)"; $ISBNPattern = "ISBN:?([0-9- xX]{10,})"; $UploadPattern = "upload:([^\\]\\s\"<>$FS]+)$QDelim"; } # Simple HTML cache sub DoCacheBrowse { my ($query, $idFile, $text); return 0 if (!$UseCache); $query = $ENV{'QUERY_STRING'}; if (($query eq "") && ($ENV{'REQUEST_METHOD'} eq "GET")) { $query = $HomePage; # Allow caching of home page. } if (!($query =~ /^$LinkPattern$/)) { if (!($FreeLinks && ($query =~ /^$FreeLinkPattern$/))) { return 0; # Only use cache for simple links } } $idFile = &GetHtmlCacheFile($query); if (-f $idFile) { local $/ = undef; # Read complete files open(INFILE, "<$idFile") or return 0; $text = ; close INFILE; print $text; return 1; } return 0; } sub GetHtmlCacheFile { my ($id) = @_; return $HtmlDir . "/" . &GetPageDirectory($id) . "/$id.htm"; } sub GetPageDirectory { my ($id) = @_; if ($id =~ /^([a-zA-Z])/) { return uc($1); } return "other"; } sub T { my ($text) = @_; if (defined($Translate{$text}) && ($Translate{$text} ne '')) { return $Translate{$text}; } return $text; } sub Ts { my ($text, $string) = @_; $text = T($text); $text =~ s/\%s/$string/; return $text; } sub Tss { my $text = @_[0]; $text = T($text); $text =~ s/\%([1-9])/$_[$1]/ge; return $text; } # == Normal page-browsing and RecentChanges code ======================= $BrowseCode = ""; # Comment next line to always compile (slower) #$BrowseCode = <<'#END_OF_BROWSE_CODE'; use CGI; use CGI::Carp qw(fatalsToBrowser); sub InitRequest { my @ScriptPath = split('/', "$ENV{SCRIPT_NAME}"); $CGI::POST_MAX = $MaxPost; if ($UseUpload) { $CGI::DISABLE_UPLOADS = 0; # allow uploads } else { $CGI::DISABLE_UPLOADS = 1; # no uploads } $q = new CGI; # Fix some issues with editing UTF8 pages (if charset specified) if ($HttpCharset ne '') { $q->charset($HttpCharset); } $Now = time; # Reset in case script is persistent $ScriptName = pop(@ScriptPath); # Name used in links $IndexInit = 0; # Must be reset for each request $InterSiteInit = 0; %InterSite = (); $MainPage = "."; # For subpages only, the name of the top-level page $OpenPageName = ""; # Currently open page &CreateDir($DataDir); # Create directory if it doesn't exist if (!-d $DataDir) { &ReportError(Ts('Could not create %s', $DataDir) . ": $!"); return 0; } &InitCookie(); # Reads in user data return 1; } sub InitCookie { %SetCookie = (); $TimeZoneOffset = 0; undef $q->{'.cookies'}; # Clear cache if it exists (for SpeedyCGI) %UserData = (); # Fix for persistent environments. %UserCookie = $q->cookie($CookieName); $UserID = $UserCookie{'id'}; $UserID =~ s/\D//g; # Numeric only if ($UserID < 200) { $UserID = 111; } else { &LoadUserData($UserID); } if ($UserID > 199) { if (($UserData{'id'} != $UserCookie{'id'}) || ($UserData{'randkey'} != $UserCookie{'randkey'})) { $UserID = 113; %UserData = (); # Invalid. Consider warning message. } } if ($UserData{'tzoffset'} != 0) { $TimeZoneOffset = $UserData{'tzoffset'} * (60 * 60); } } sub DoBrowseRequest { my ($id, $action, $text); if (!$q->param) { # No parameter &BrowsePage($HomePage); return 1; } $id = &GetParam('keywords', ''); if ($id) { # Just script?PageName if ($FreeLinks && (!-f &GetPageFile($id))) { $id = &FreeToNormal($id); } if (($NotFoundPg ne '') && (!-f &GetPageFile($id))) { $id = $NotFoundPg; } &BrowsePage($id) if &ValidIdOrDie($id); return 1; } $action = lc(&GetParam('action', '')); $id = &GetParam('id', ''); if ($action eq 'browse') { if ($FreeLinks && (!-f &GetPageFile($id))) { $id = &FreeToNormal($id); } if (($NotFoundPg ne '') && (!-f &GetPageFile($id))) { $id = $NotFoundPg; } &BrowsePage($id) if &ValidIdOrDie($id); return 1; } elsif ($action eq 'rc') { &BrowsePage($RCName); return 1; } elsif ($action eq 'random') { &DoRandom(); return 1; } elsif ($action eq 'history') { &DoHistory($id) if &ValidIdOrDie($id); return 1; } return 0; # Request not handled } sub BrowsePage { my ($id) = @_; my ($fullHtml, $oldId, $allDiff, $showDiff, $openKept); my ($revision, $goodRevision, $diffRevision, $newText); &OpenPage($id); &OpenDefaultText(); $openKept = 0; $revision = &GetParam('revision', ''); $revision =~ s/\D//g; # Remove non-numeric chars $goodRevision = $revision; # Non-blank only if exists if ($revision ne '') { &OpenKeptRevisions('text_default'); $openKept = 1; if (!defined($KeptRevisions{$revision})) { $goodRevision = ''; } else { &OpenKeptRevision($revision); } } # Raw mode: just untranslated wiki text if (&GetParam('raw', 0)) { print &GetHttpHeader('text/plain'); print $Text{'text'}; return; } $newText = $Text{'text'}; # For differences # Handle a single-level redirect $oldId = &GetParam('oldid', ''); if (($oldId eq '') && (substr($Text{'text'}, 0, 10) eq '#REDIRECT ')) { $oldId = $id; if (($FreeLinks) && ($Text{'text'} =~ /\#REDIRECT\s+\[\[.+\]\]/)) { ($id) = ($Text{'text'} =~ /\#REDIRECT\s+\[\[(.+)\]\]/); $id = &FreeToNormal($id); } else { ($id) = ($Text{'text'} =~ /\#REDIRECT\s+(\S+)/); } if (&ValidId($id) eq '') { # Consider revision in rebrowse? &ReBrowsePage($id, $oldId, 0); return; } else { # Not a valid target, so continue as normal page $id = $oldId; $oldId = ''; } } $MainPage = $id; $MainPage =~ s|/.*||; # Only the main page name (remove subpage) $fullHtml = &GetHeader($id, &QuoteHtml($id), $oldId); if ($revision ne '') { if (($revision eq $Page{'revision'}) || ($goodRevision ne '')) { $fullHtml .= '' . Ts('Showing revision %s', $revision) . "
"; } else { $fullHtml .= '' . Ts('Revision %s not available', $revision) . ' (' . T('showing current revision instead') . ')
'; } } $allDiff = &GetParam('alldiff', 0); if ($allDiff != 0) { $allDiff = &GetParam('defaultdiff', 1); } if ((($id eq $RCName) || (T($RCName) eq $id) || (T($id) eq $RCName)) && &GetParam('norcdiff', 1)) { $allDiff = 0; # Only show if specifically requested } $showDiff = &GetParam('diff', $allDiff); if ($UseDiff && $showDiff) { $diffRevision = $goodRevision; $diffRevision = &GetParam('diffrevision', $diffRevision); # Eventually try to avoid the following keep-loading if possible? &OpenKeptRevisions('text_default') if (!$openKept); $fullHtml .= &GetDiffHTML($showDiff, $id, $diffRevision, $revision, $newText); $fullHtml .= "
\n"; } $fullHtml .= '
'; $fullHtml .= &WikiToHTML($Text{'text'}); $fullHtml .= '
'; if (!&GetParam('embed', $EmbedWiki)) { $fullHtml .= "
\n"; } if (($id eq $RCName) || (T($RCName) eq $id) || (T($id) eq $RCName)) { print $fullHtml; print '
'; &DoRc(1); print '
'; print "
\n" if (!&GetParam('embed', $EmbedWiki)); print &GetFooterText($id, $goodRevision); return; } $fullHtml .= &GetFooterText($id, $goodRevision); print $fullHtml; return if ($showDiff || ($revision ne '')); # Don't cache special version &UpdateHtmlCache($id, $fullHtml) if ($UseCache && ($oldId eq '')); } sub ReBrowsePage { my ($id, $oldId, $isEdit) = @_; if ($oldId ne "") { # Target of #REDIRECT (loop breaking) print &GetRedirectPage("action=browse&id=$id&oldid=$oldId", $id, $isEdit); } else { print &GetRedirectPage($id, $id, $isEdit); } } sub DoRc { my ($rcType) = @_; # 0 = RSS, 1 = HTML my ($fileData, $rcline, $i, $daysago, $lastTs, $ts, $idOnly); my (@fullrc, $status, $oldFileData, $firstTs, $errorText, $showHTML); my $starttime = 0; my $showbar = 0; if (0 == $rcType) { $showHTML = 0; } else { $showHTML = 1; } if (&GetParam("from", 0)) { $starttime = &GetParam("from", 0); if ($showHTML) { print "

" . Ts('Updates since %s', &TimeToText($starttime)) . "

\n"; } } else { $daysago = &GetParam("days", 0); $daysago = &GetParam("rcdays", 0) if ($daysago == 0); if ($daysago) { $starttime = $Now - ((24*60*60)*$daysago); if ($showHTML) { print "

" . Ts('Updates in the last %s day' . (($daysago != 1)?"s":""), $daysago) . "

\n"; } # Note: must have two translations (for "day" and "days") # Following comment line is for translation helper script # Ts('Updates in the last %s days', ''); } } if ($starttime == 0) { if (0 == $rcType) { $starttime = $Now - ((24*60*60)*$RssDays); } else { $starttime = $Now - ((24*60*60)*$RcDefault); } if ($showHTML) { print "

" . Ts('Updates in the last %s day' . (($RcDefault != 1)?"s":""), $RcDefault) . "

\n"; } # Translation of above line is identical to previous version } # Read rclog data (and oldrclog data if needed) ($status, $fileData) = &ReadFile($RcFile); $errorText = ""; if (!$status) { # Save error text if needed. $errorText = '

' . Ts('Could not open %s log file', $RCName) . ": $RcFile

" . T('Error was') . ":\n

$!
\n" . '

' . T('Note: This error is normal if no changes have been made.') . "\n"; } @fullrc = split(/\n/, $fileData); $firstTs = 0; if (@fullrc > 0) { # Only false if no lines in file ($firstTs) = split(/$FS3/, $fullrc[0]); } if (($firstTs == 0) || ($starttime <= $firstTs)) { ($status, $oldFileData) = &ReadFile($RcOldFile); if ($status) { @fullrc = split(/\n/, $oldFileData . $fileData); } else { if ($errorText ne "") { # could not open either rclog file print $errorText; print "

" . Ts('Could not open old %s log file', $RCName) . ": $RcOldFile

" . T('Error was') . ":\n

$!
\n"; return; } } } $lastTs = 0; if (@fullrc > 0) { # Only false if no lines in file ($lastTs) = split(/$FS3/, $fullrc[$#fullrc]); } $lastTs++ if (($Now - $lastTs) > 5); # Skip last unless very recent $idOnly = &GetParam("rcidonly", ""); if ($idOnly && $showHTML) { print '(' . Ts('for %s only', &ScriptLink($idOnly, $idOnly)) . ')
'; } if ($showHTML) { foreach $i (@RcDays) { print " | " if $showbar; $showbar = 1; print &ScriptLink("action=rc&days=$i", Ts('%s day' . (($i != 1)?'s':''), $i)); # Note: must have two translations (for "day" and "days") # Following comment line is for translation helper script # Ts('%s days', ''); } print "
" . &ScriptLink("action=rc&from=$lastTs", T('List new changes starting from')); print " " . &TimeToText($lastTs) . "
\n"; } $i = 0; while ($i < @fullrc) { # Optimization: skip old entries quickly ($ts) = split(/$FS3/, $fullrc[$i]); if ($ts >= $starttime) { $i -= 1000 if ($i > 0); last; } $i += 1000; } $i -= 1000 if (($i > 0) && ($i >= @fullrc)); for (; $i < @fullrc ; $i++) { ($ts) = split(/$FS3/, $fullrc[$i]); last if ($ts >= $starttime); } if ($i == @fullrc && $showHTML) { print '
' . Ts('No updates since %s', &TimeToText($starttime)) . "
\n"; } else { splice(@fullrc, 0, $i); # Remove items before index $i # Consider an end-time limit (items older than X) if (0 == $rcType) { print &GetRcRss(@fullrc); } else { print &GetRcHtml(@fullrc); } } if ($showHTML) { print '

' . Ts('Page generated %s', &TimeToText($Now)), "
\n"; } } sub GetRc { my $rcType = shift; my @outrc = @_; my ($rcline, $date, $newtop, $author, $inlist, $result); my ($showedit, $link, $all, $idOnly, $headItem, $item); my ($ts, $pagename, $summary, $isEdit, $host, $kind, $extraTemp); my ($rcchangehist, $tEdit, $tChanges, $tDiff); my ($headList, $historyPrefix, $diffPrefix); my %extra = (); my %changetime = (); my %pagecount = (); # Slice minor edits $showedit = &GetParam("rcshowedit", $ShowEdits); $showedit = &GetParam("showedit", $showedit); if ($showedit != 1) { my @temprc = (); foreach $rcline (@outrc) { ($ts, $pagename, $summary, $isEdit, $host) = split(/$FS3/, $rcline); if ($showedit == 0) { # 0 = No edits push(@temprc, $rcline) if (!$isEdit); } else { # 2 = Only edits push(@temprc, $rcline) if ($isEdit); } } @outrc = @temprc; } # Optimize param fetches out of main loop $rcchangehist = &GetParam("rcchangehist", 1); # Optimize translations out of main loop $tEdit = T('(edit)'); $tDiff = T('(diff)'); $tChanges = T('changes'); $diffPrefix = $QuotedFullUrl . &QuoteHtml("?action=browse\&diff=4\&id="); $historyPrefix = $QuotedFullUrl . &QuoteHtml("?action=history\&id="); foreach $rcline (@outrc) { ($ts, $pagename) = split(/$FS3/, $rcline); $pagecount{$pagename}++; $changetime{$pagename} = $ts; } $date = ""; $all = &GetParam("rcall", 0); $all = &GetParam("all", $all); $newtop = &GetParam("rcnewtop", $RecentTop); $newtop = &GetParam("newtop", $newtop); $idOnly = &GetParam("rcidonly", ""); $inlist = 0; $headList = ''; $result = ''; @outrc = reverse @outrc if ($newtop); foreach $rcline (@outrc) { ($ts, $pagename, $summary, $isEdit, $host, $kind, $extraTemp) = split(/$FS3/, $rcline); next if ((!$all) && ($ts < $changetime{$pagename})); next if (($idOnly ne "") && ($idOnly ne $pagename)); %extra = split(/$FS2/, $extraTemp, -1); if ($date ne &CalcDay($ts)) { $date = &CalcDay($ts); if (1 == $rcType) { # HTML # add date, properly closing lists first if ($inlist) { $result .= "\n"; $inlist = 0; } $result .= "

" . $date . "

\n"; if (!$inlist) { $result .= "
    \n"; $inlist = 1; } } } if (0 == $rcType) { # RSS ($headItem, $item) = &GetRssRcLine($pagename, $ts, $host, $extra{'name'}, $extra{'id'}, $summary, $isEdit, $pagecount{$pagename}, $extra{'revision'}, $diffPrefix, $historyPrefix); $headList .= $headItem; $result .= $item; } else { # HTML $result .= &GetHtmlRcLine($pagename, $ts, $host, $extra{'name'}, $extra{'id'}, $summary, $isEdit, $pagecount{$pagename}, $extra{'revision'}, $tEdit, $tDiff, $tChanges, $all, $rcchangehist); } } if (1 == $rcType) { $result .= "
\n" if ($inlist); # Close final tag } return ($headList, $result); # Just ignore headList for HTML } sub GetRcHtml { my ($html, $extra); ($extra, $html) = &GetRc(1, @_); return $html; } sub GetHtmlRcLine { my ($pagename, $timestamp, $host, $userName, $userID, $summary, $isEdit, $pagecount, $revision, $tEdit, $tDiff, $tChanges, $all, $rcchangehist) = @_; my ($author, $sum, $edit, $count, $link, $html); $html = ''; $host = &QuoteHtml($host); if (defined($userName) && defined($userID)) { $author = &GetAuthorLink($host, $userName, $userID); } else { $author = &GetAuthorLink($host, "", 0); } $sum = ""; if (($summary ne "") && ($summary ne "*")) { $summary = &QuoteHtml($summary); $sum = "[$summary] "; } $edit = ""; $edit = "$tEdit " if ($isEdit); $count = ""; if ((!$all) && ($pagecount > 1)) { $count = "($pagecount "; if ($rcchangehist) { $count .= &GetHistoryLink($pagename, $tChanges); } else { $count .= $tChanges; } $count .= ") "; } $link = ""; if ($UseDiff && &GetParam("diffrclink", 1)) { $link .= &ScriptLinkDiff(4, $pagename, $tDiff, "") . " "; } $link .= &GetPageLink($pagename); $html .= "
  • $link "; $html .= &CalcTime($timestamp) . " $count$edit" . " $sum"; $html .= ". . . . . $author\n"; return $html; } sub GetRcRss { my ($rssHeader, $headList, $items); # Normally get URL from script, but allow override $FullUrl = $q->url(-full=>1) if ($FullUrl eq ""); $QuotedFullUrl = &QuoteHtml($FullUrl); $SiteDescription = &QuoteHtml($SiteDescription); my $ChannelAbout = &QuoteHtml($FullUrl . &ScriptLinkChar() . $ENV{QUERY_STRING}); $rssHeader = < ${\(&QuoteHtml($SiteName))} ${\($QuotedFullUrl . &QuoteHtml("?$RCName"))} ${\(&QuoteHtml($SiteDescription))} $InterWikiMoniker RSS ($headList, $items) = &GetRc(0, @_); $rssHeader .= $headList; return < ${\(&QuoteHtml($SiteName))} $RssLogoUrl $QuotedFullUrl $items RSS } sub GetRssRcLine{ my ($pagename, $timestamp, $host, $userName, $userID, $summary, $isEdit, $pagecount, $revision, $diffPrefix, $historyPrefix) = @_; my ($itemID, $description, $authorLink, $author, $status, $importance, $date, $item, $headItem); # Add to list of items in the $itemID = $FullUrl . &ScriptLinkChar() . &GetOldPageParameters('browse', $pagename, $revision); $itemID = &QuoteHtml($itemID); $headItem = " \n"; # Add to list of items proper. if (($summary ne "") && ($summary ne "*")) { $description = &QuoteHtml($summary); } $host = &QuoteHtml($host); if ($userName) { $author = &QuoteHtml($userName); $authorLink = "link=\"$QuotedFullUrl?$author\""; } else { $author = $host; } $status = (1 == $revision) ? 'new' : 'updated'; $importance = $isEdit ? 'minor' : 'major'; $timestamp += $TimeZoneOffset; my ($sec, $min, $hour, $mday, $mon, $year) = localtime($timestamp); $year += 1900; $date = sprintf("%4d-%02d-%02dT%02d:%02d:%02d+%02d:00", $year, $mon+1, $mday, $hour, $min, $sec, $TimeZoneOffset/(60*60)); $pagename = &QuoteHtml($pagename); # Write it out longhand $item = < $pagename $QuotedFullUrl?$pagename $description $date $author $status $importance $diffPrefix$pagename $revision $historyPrefix$pagename RSS return ($headItem, $item); } sub DoRss { print "Content-type: text/xml\n\n"; &DoRc(0); } sub DoRandom { my ($id, @pageList); @pageList = &AllPagesList(); # Optimize? $id = $pageList[int(rand($#pageList + 1))]; &ReBrowsePage($id, "", 0); } sub DoHistory { my ($id) = @_; my ($html, $canEdit, $row, $newText); print &GetHeader('', Ts('History of %s', $id), '') . '
    '; &OpenPage($id); &OpenDefaultText(); $newText = $Text{'text'}; $canEdit = 0; $canEdit = &UserCanEdit($id) if ($HistoryEdit); if ($UseDiff) { print < EOF } $html = &GetHistoryLine($id, $Page{'text_default'}, $canEdit, $row++); &OpenKeptRevisions('text_default'); foreach (reverse sort {$a <=> $b} keys %KeptRevisions) { next if ($_ eq ""); # (needed?) $html .= &GetHistoryLine($id, $KeptRevisions{$_}, $canEdit, $row++); } print $html; if ($UseDiff) { my $label = T('Compare'); print "
      
    \n"; print "
    \n"; print &GetDiffHTML(&GetParam('defaultdiff', 1), $id, '', '', $newText); } print &GetCommonFooter(); } sub GetMaskedHost { my ($text) = @_; my ($logText); if (!$MaskHosts) { return $text; } $logText = T('(logged)'); if (!($text =~ s/\d+$/$logText/)) { # IP address (ending numbers masked) $text =~ s/^[^\.\(]+/$logText/; # Host name: mask until first . } return $text; } sub GetHistoryLine { my ($id, $section, $canEdit, $row) = @_; my ($html, $expirets, $rev, $summary, $host, $user, $uid, $ts, $minor); my (%sect, %revtext); %sect = split(/$FS2/, $section, -1); %revtext = split(/$FS3/, $sect{'data'}); $rev = $sect{'revision'}; $summary = $revtext{'summary'}; if ((defined($sect{'host'})) && ($sect{'host'} ne '')) { $host = $sect{'host'}; } else { $host = $sect{'ip'}; } $host = &GetMaskedHost($host); $user = $sect{'username'}; $uid = $sect{'id'}; $ts = $sect{'ts'}; $minor = ''; $minor = '' . T('(edit)') . ' ' if ($revtext{'minor'}); $expirets = $Now - ($KeepDays * 24 * 60 * 60); if ($UseDiff) { my ($c1, $c2); $c1 = 'checked="checked"' if 1 == $row; $c2 = 'checked="checked"' if 0 == $row; $html .= " "; $html .= ""; } if (0 == $row) { # current revision $html .= &GetPageLinkText($id, Ts('Revision %s', $rev)) . ' '; if ($canEdit) { $html .= &GetEditLink($id, T('Edit')) . ' '; } } else { $html .= &GetOldPageLink('browse', $id, $rev, Ts('Revision %s', $rev)) . ' '; if ($canEdit) { $html .= &GetOldPageLink('edit', $id, $rev, T('Edit')) . ' '; } } $html .= ". . " . $minor . &TimeToText($ts) . " "; $html .= T('by') . ' ' . &GetAuthorLink($host, $user, $uid) . " "; if (defined($summary) && ($summary ne "") && ($summary ne "*")) { $summary = &QuoteHtml($summary); # Thanks Sunir! :-) $html .= "[$summary] "; } $html .= $UseDiff ? "\n" : "
    \n"; return $html; } # ==== HTML and page-oriented functions ==== sub ScriptLinkChar { if ($SlashLinks) { return '/'; } return '?'; } sub ScriptLink { my ($action, $text) = @_; return "$text"; } sub ScriptLinkClass { my ($action, $text, $class) = @_; return "$text"; } sub GetAuthorLink { my ($host, $userName, $uid) = @_; my ($html, $title, $userNameShow); $userNameShow = $userName; if ($FreeLinks) { $userName =~ s/ /_/g; $userNameShow =~ s/_/ /g; } if (&ValidId($userName) ne "") { # Invalid under current rules $userName = ""; # Just pretend it isn't there. } if (($uid > 0) && ($userName ne "")) { $html = &ScriptLinkTitle($userName, $userNameShow, Ts('ID %s', $uid) . ' ' . Ts('from %s', $host)); } else { $html = $host; } return $html; } sub GetHistoryLink { my ($id, $text) = @_; if ($FreeLinks) { $id =~ s/ /_/g; } return &ScriptLink("action=history&id=$id", $text); } sub GetHeader { my ($id, $title, $oldId) = @_; my $header = ""; my $logoImage = ""; my $result = ""; my $embed = &GetParam('embed', $EmbedWiki); my $altText = T('[Home]'); $result = &GetHttpHeader(''); if ($FreeLinks) { $title =~ s/_/ /g; # Display as spaces } $result .= &GetHtmlHeader("$SiteName: $title"); return $result if ($embed); $result .= '
    '; if ($oldId ne '') { $result .= $q->h3('(' . Ts('redirected from %s', &GetEditLink($oldId, $oldId)) . ')'); } if ((!$embed) && ($LogoUrl ne "")) { $logoImage = "img src=\"$LogoUrl\" alt=\"$altText\" border=0"; if (!$LogoLeft) { $logoImage .= " align=\"right\""; } $header = &ScriptLink($HomePage, "<$logoImage>"); } if ($id ne '') { $result .= $q->h1($header . &GetBackLinksSearchLink($id)); } else { $result .= $q->h1($header . $title); } if (&GetParam("toplinkbar", 1)) { $result .= &GetGotoBar($id) . "
    "; } $result .= '
    '; return $result; } sub GetHttpHeader { my ($type) = @_; my $cookie; $type = 'text/html' if ($type eq ''); if (defined($SetCookie{'id'})) { $cookie = "$CookieName=" . "rev&" . $SetCookie{'rev'} . "&id&" . $SetCookie{'id'} . "&randkey&" . $SetCookie{'randkey'}; $cookie .= ";expires=Fri, 08-Sep-2013 19:48:23 GMT"; if ($HttpCharset ne '') { return $q->header(-cookie=>$cookie, -type=>"$type; charset=$HttpCharset"); } return $q->header(-cookie=>$cookie); } if ($HttpCharset ne '') { return $q->header(-type=>"$type; charset=$HttpCharset"); } return $q->header(-type=>$type); } sub GetHtmlHeader { my ($title) = @_; my ($dtd, $html, $bodyExtra, $stylesheet); $html = ''; $dtd = '-//IETF//DTD HTML//EN'; $html = qq(\n); $title = $q->escapeHTML($title); $html .= "$title\n"; if ($FavIcon ne '') { $html .= '' } if ($MetaKeywords) { my $keywords = $OpenPageName; $keywords =~ s/([a-z])([A-Z])/$1, $2/g; $html .= "\n" if $keywords; } if ($SiteBase ne "") { $html .= qq(\n); } $stylesheet = &GetParam('stylesheet', $StyleSheet); $stylesheet = $StyleSheet if ($stylesheet eq ''); $stylesheet = '' if ($stylesheet eq '*'); # Allow removing override if ($stylesheet ne '') { $html .= qq(\n); } $html .= $UserHeader; $bodyExtra = ''; if ($UserBody ne '') { $bodyExtra = ' ' . $UserBody; } if ($BGColor ne '') { $bodyExtra .= qq( BGCOLOR="$BGColor"); } $html .= "\n"; return $html; } sub GetFooterText { my ($id, $rev) = @_; my $result; if (&GetParam('embed', $EmbedWiki)) { return $q->end_html; } $result = '
    '; $result .= &GetFormStart(); $result .= &GetGotoBar($id); if (&UserCanEdit($id, 0)) { if ($rev ne '') { $result .= &GetOldPageLink('edit', $id, $rev, Ts('Edit revision %s of this page', $rev)); } else { $result .= &GetEditLink($id, T('Edit text of this page')); } } else { $result .= T('This page is read-only'); } $result .= ' | '; $result .= &GetHistoryLink($id, T('View other revisions')); if ($rev ne '') { $result .= ' | '; $result .= &GetPageLinkText($id, T('View current revision')); } if ($UseMetaWiki) { $result .= ' | ' . T('Search MetaWiki') . ''; } if ($Section{'revision'} > 0) { $result .= '
    '; if ($rev eq '') { # Only for most current rev $result .= T('Last edited'); } else { $result .= T('Edited'); } $result .= ' ' . &TimeToText($Section{ts}); if ($AuthorFooter) { $result .= ' ' . Ts('by %s', &GetAuthorLink($Section{'host'}, $Section{'username'}, $Section{'id'})); } } if ($UseDiff) { $result .= ' ' . &ScriptLinkDiff(4, $id, T('(diff)'), $rev); } $result .= '
    ' . &GetSearchForm(); if ($AdminBar && &UserIsAdmin()) { $result .= '
    ' . &GetAdminBar($id); } if ($DataDir =~ m|/tmp/|) { $result .= '
    ' . T('Warning') . ': ' . Ts('Database is stored in temporary directory %s', $DataDir) . '
    '; } if ($ConfigError ne '') { $result .= '
    ' . T('Config file error:') . ' ' . $ConfigError . '
    '; } $result .= $q->endform; if ($FooterNote ne '') { $result .= T($FooterNote); } $result .= '
    '; $result .= &GetMinimumFooter(); return $result; } sub GetCommonFooter { my ($html); $html = '
    ' . '
    ' . &GetFormStart() . &GetGotoBar('') . &GetSearchForm() . $q->endform; if ($FooterNote ne '') { $html .= T($FooterNote); } $html .= '
    ' . $q->end_html; return $html; } sub GetMinimumFooter { return $q->end_html; } sub GetFormStart { return $q->startform("POST", "$ScriptName", "application/x-www-form-urlencoded"); } sub GetGotoBar { my ($id) = @_; my ($main, $bartext); $bartext = &GetPageLink($HomePage); if ($id =~ m|/|) { $main = $id; $main =~ s|/.*||; # Only the main page name (remove subpage) $bartext .= " | " . &GetPageLink($main); } $bartext .= " | " . &GetPageLink($RCName); $bartext .= " | " . &GetPrefsLink(); if ($UseUpload && &UserCanUpload()) { $bartext .= " | " . &GetUploadLink(); } if (&GetParam("linkrandom", 0)) { $bartext .= " | " . &GetRandomLink(); } if ($UserGotoBar ne '') { $bartext .= " | " . $UserGotoBar; } $bartext .= "
    \n"; return $bartext; } sub GetSearchForm { my ($result); $result = T('Search:') . ' ' . $q->textfield(-name=>'search', -size=>20); if ($SearchButton) { $result .= $q->submit('dosearch', T('Go!')); } else { $result .= &GetHiddenValue("dosearch", 1); } return $result; } sub GetRedirectPage { my ($newid, $name, $isEdit) = @_; my ($url, $html); my ($nameLink); # Normally get URL from script, but allow override. $FullUrl = $q->url(-full=>1) if ($FullUrl eq ""); $url = $FullUrl . &ScriptLinkChar() . $newid; $nameLink = "$name"; if ($RedirType < 3) { if ($RedirType == 1) { # Use CGI.pm # NOTE: do NOT use -method (does not work with old CGI.pm versions) # Thanks to Daniel Neri for fixing this problem. $html = $q->redirect(-uri=>$url); } else { # Minimal header $html = "Status: 302 Moved\n"; $html .= "Location: $url\n"; $html .= "Content-Type: text/html\n"; # Needed for browser failure $html .= "\n"; } $html .= "\n" . Ts('Your browser should go to the %s page.', $newid); $html .= ' ' . Ts('If it does not, click %s to continue.', $nameLink); } else { if ($isEdit) { $html = &GetHeader('', T('Thanks for editing...'), ''); $html .= Ts('Thank you for editing %s.', $nameLink); } else { $html = &GetHeader('', T('Link to another page...'), ''); } $html .= "\n

    "; $html .= Ts('Follow the %s link to continue.', $nameLink); $html .= &GetMinimumFooter(); } return $html; } # ==== Common wiki markup ==== sub RestoreSavedText { my ($text) = @_; 1 while $text =~ s/$FS(\d+)$FS/$SaveUrl{$1}/ge; # Restore saved text return $text; } sub RemoveFS { my ($text) = @_; # Note: must remove all $FS, and $FS may be multi-byte/char separator $text =~ s/($FS)+(\d)/$2/g; return $text; } sub WikiToHTML { my ($pageText) = @_; $TableMode = 0; %SaveUrl = (); %SaveNumUrl = (); $SaveUrlIndex = 0; $SaveNumUrlIndex = 0; $pageText = &RemoveFS($pageText); if ($RawHtml) { $pageText =~ s/((.|\n)*?)<\/html>/&StoreRaw($1)/ige; } $pageText = &QuoteHtml($pageText); $pageText =~ s/\\ *\r?\n/ /g; # Join lines with backslash at end if ($ParseParas) { # Note: The following 3 rules may span paragraphs, so they are # copied from CommonMarkup $pageText =~ s/\<nowiki\>((.|\n)*?)\<\/nowiki\>/&StoreRaw($1)/ige; $pageText =~ s/\<pre\>((.|\n)*?)\<\/pre\>/&StorePre($1, "pre")/ige; $pageText =~ s/\<code\>((.|\n)*?)\<\/code\>/&StorePre($1, "code")/ige; $pageText =~ s/((.|\n)+?\n)\s*\n/&ParseParagraph($1)/geo; $pageText =~ s/(.*)<\/p>(.+)$/$1.&ParseParagraph($2)/seo; } else { $pageText = &CommonMarkup($pageText, 1, 0); # Multi-line markup $pageText = &WikiLinesToHtml($pageText); # Line-oriented markup } while (@HeadingNumbers) { pop @HeadingNumbers; $TableOfContents .= "\n\n"; } $pageText =~ s/<toc>/$TableOfContents/gi; if ($LateRules ne '') { $pageText = &EvalLocalRules($LateRules, $pageText, 0); } return &RestoreSavedText($pageText); } sub CommonMarkup { my ($text, $useImage, $doLines) = @_; local $_ = $text; if ($doLines < 2) { # 2 = do line-oriented only # The tag stores text with no markup (except quoting HTML) s/\<nowiki\>((.|\n)*?)\<\/nowiki\>/&StoreRaw($1)/ige; # The 

     tag wraps the stored text with the HTML 
     tag
    s/\<pre\>((.|\n)*?)\<\/pre\>/&StorePre($1, "pre")/ige;
    s/\<code\>((.|\n)*?)\<\/code\>/&StorePre($1, "code")/ige;
    if ($EarlyRules ne '') {
      $_ = &EvalLocalRules($EarlyRules, $_, !$useImage);
    }
    s/\[\#(\w+)\]/&StoreHref(" name=\"$1\"")/ge if $NamedAnchors;
    if ($HtmlTags) {
      my ($t);
      foreach $t (@HtmlPairs) {
        s/\<$t(\s[^<>]+?)?\>(.*?)\<\/$t\>/<$t$1>$2<\/$t>/gis;
      }
      foreach $t (@HtmlSingle) {
        s/\<$t(\s[^<>]+?)?\>/<$t$1>/gi;
      }
    } else {
      # Note that these tags are restricted to a single line
      s/\<b\>(.*?)\<\/b\>/$1<\/b>/gi;
      s/\<i\>(.*?)\<\/i\>/$1<\/i>/gi;
      s/\<strong\>(.*?)\<\/strong\>/$1<\/strong>/gi;
      s/\<em\>(.*?)\<\/em\>/$1<\/em>/gi;
    }
    s/\<tt\>(.*?)\<\/tt\>/$1<\/tt>/gis;  #  (MeatBall)
    s/\<br\>/
    /gi;  # Allow simple line break anywhere
    if ($HtmlLinks) {
      s/\<A(\s[^<>]+?)\>(.*?)\<\/a\>/&StoreHref($1, $2)/gise;
    }
    if ($FreeLinks) {
      # Consider: should local free-link descriptions be conditional?
      # Also, consider that one could write [[Bad Page|Good Page]]?
      s/\[\[$FreeLinkPattern\|([^\]]+)\]\]/&StorePageOrEditLink($1, $2)/geo;
      s/\[\[$FreeLinkPattern\]\]/&StorePageOrEditLink($1, "")/geo;
    }
    if ($BracketText) {  # Links like [URL text of link]
      s/\[$UrlPattern\s+([^\]]+?)\]/&StoreBracketUrl($1, $2, $useImage)/geos;
      s/\[$InterLinkPattern\s+([^\]]+?)\]/&StoreBracketInterPage($1, $2,
                                                             $useImage)/geos;
      if ($WikiLinks && $BracketWiki) {  # Local bracket-links
        s/\[$LinkPattern\s+([^\]]+?)\]/&StoreBracketLink($1, $2)/geos;
        s/\[$AnchoredLinkPattern\s+([^\]]+?)\]/&StoreBracketAnchoredLink($1,
                                               $2, $3)/geos if $NamedAnchors;
      }
    }
    s/\[$UrlPattern\]/&StoreBracketUrl($1, "", 0)/geo;
    s/\[$InterLinkPattern\]/&StoreBracketInterPage($1, "", 0)/geo;
    s/\b$UrlPattern/&StoreUrl($1, $useImage)/geo;
    s/\b$InterLinkPattern/&StoreInterPage($1, $useImage)/geo;
    if ($WikiLinks) {
      s/$AnchoredLinkPattern/&StoreRaw(&GetPageOrEditAnchoredLink($1,
                             $2, ""))/geo if $NamedAnchors;
      # CAA: Putting \b in front of $LinkPattern breaks /SubPage links
      #      (subpage links without the main page)
      s/$LinkPattern/&GetPageOrEditLink($1, "")/geo;
    }
    s/\b$RFCPattern/&StoreRFC($1)/geo;
    s/\b$ISBNPattern/&StoreISBN($1)/geo;
    if ($UseUpload) {
      s/$UploadPattern/&StoreUpload($1)/geo;
    }
    if ($ThinLine) {
      if ($OldThinLine) {  # Backwards compatible, conflicts with headers
        s/====+/
    /g;
      } else {             # New behavior--no conflict
        s/------+/
    /g;
      }
      s/----+/
    /g;
    } else {
      s/----+/
    /g;
    }
  }
  if ($doLines) { # 0 = no line-oriented, 1 or 2 = do line-oriented
    # The quote markup patterns avoid overlapping tags (with 5 quotes)
    # by matching the inner quotes for the strong pattern.
    s/('*)'''(.*?)'''/$1$2<\/strong>/g;
    s/''(.*?)''/$1<\/em>/g;
    if ($UseHeadings) {
      s/(^|\n)\s*(\=+)\s+([^\n]+)\s+\=+/&WikiHeading($1, $2, $3)/geo;
    }
    if ($TableMode) {
      s/((\|\|)+)/"<\/TD>"/ge;
    }
  }
  return $_;
}

sub WikiLinesToHtml {
  my ($pageText) = @_;
  my ($pageHtml, @htmlStack, $code, $codeAttributes, $depth, $oldCode);

  @htmlStack = ();
  $depth = 0;
  $pageHtml = "";
  foreach (split(/\n/, $pageText)) {  # Process lines one-at-a-time
    $code = '';
    $codeAttributes = '';
    $TableMode = 0;
    $_ .= "\n";
    if (s/^(\;+)([^:]+\:?)\:/
    $2
    /) {
      $code = "DL";
      $depth = length $1;
    } elsif (s/^(\:+)/
    /) {
      $code = "DL";
      $depth = length $1;
    } elsif (s/^(\*+)/
  • /) {
      $code = "UL";
      $depth = length $1;
    } elsif (s/^(\#+)/
  • /) {
      $code = "OL";
      $depth = length $1;
    } elsif ($TableSyntax &&
             s/^((\|\|)+)(.*)\|\|\s*$/"$3<\/TD><\/TR>\n"/e) {
      $code = 'TABLE';
      $codeAttributes = "BORDER='1'";
      $TableMode = 1;
      $depth = 1;
    } elsif (/^[ \t].*\S/) {
      $code = "PRE";
      $depth = 1;
    } else {
      $depth = 0;
    }
    while (@htmlStack > $depth) {   # Close tags as needed
      $pageHtml .=  "\n";
    }
    if ($depth > 0) {
      $depth = $IndentLimit  if ($depth > $IndentLimit);
      if (@htmlStack) {  # Non-empty stack
        $oldCode = pop(@htmlStack);
        if ($oldCode ne $code) {
          $pageHtml .= "<$code>\n";
        }
        push(@htmlStack, $code);
      }
      while (@htmlStack < $depth) {
        push(@htmlStack, $code);
        $pageHtml .= "<$code $codeAttributes>\n";
      }
    }
    if (!$ParseParas) {
      s/^\s*$/
    \n/;                      # Blank lines become 
     tags
    }
    $pageHtml .= &CommonMarkup($_, 1, 2);  # Line-oriented common markup
  }
  while (@htmlStack > 0) {       # Clear stack
    $pageHtml .=  "\n";
  }
  return $pageHtml;
}

sub EvalLocalRules {
  my ($rules, $origText, $isDiff) = @_;
  my ($text, $reportError, $errorText);

  $text = $origText;
  $reportError = 1;
  # Basic idea: the $rules should change $text, possibly with different
  # behavior if $isDiff is true (no images or color changes?)
  # Note: for fun, the $rules could also change $reportError and $origText
  if (!eval $rules) {
    $errorText = $@;
    if ($errorText eq '') {
      # Search for "Unknown Error" for the reason the next line is commented
#     $errorText = T('Unknown Error (no error text)');
    }
    if ($errorText ne '') {
      $text = $origText;    # Consider: should partial results be kept?
      if ($reportError) {
        $text .= '
    ' . T('Local rule error:') . '
    '
                 . &QuoteHtml($errorText);
      }
    }
  }
  return $text;
}
 
sub QuoteHtml {
  my ($html) = @_;

  $html =~ s/&/&/g;
  $html =~ s//>/g;
  $html =~ s/&([#a-zA-Z0-9]+);/&$1;/g;  # Allow character references
  return $html;
}

sub ParseParagraph {
  my ($text) = @_;

  $text = &CommonMarkup($text, 1, 0);   # Multi-line markup
  $text = &WikiLinesToHtml($text);      # Line-oriented markup
  return "
    $text
    \n";
}

sub StoreInterPage {
  my ($id, $useImage) = @_;
  my ($link, $extra);

  ($link, $extra) = &InterPageLink($id, $useImage);
  # Next line ensures no empty links are stored
  $link = &StoreRaw($link)  if ($link ne "");
  return $link . $extra;
}

sub InterPageLink {
  my ($id, $useImage) = @_;
  my ($name, $site, $remotePage, $url, $punct);

  ($id, $punct) = &SplitUrlPunct($id);
  $name = $id;
  ($site, $remotePage) = split(/:/, $id, 2);
  $url = &GetSiteUrl($site);
  return ("", $id . $punct)  if ($url eq "");
  $remotePage =~ s/&/&/g;  # Unquote common URL HTML
  $url .= $remotePage;
  return (&UrlLinkOrImage($url, $name, $useImage), $punct);
}

sub StoreBracketInterPage {
  my ($id, $text, $useImage) = @_;
  my ($site, $remotePage, $url, $index);

  ($site, $remotePage) = split(/:/, $id, 2);
  $remotePage =~ s/&/&/g;  # Unquote common URL HTML
  $url = &GetSiteUrl($site);
  if ($text ne "") {
    return "[$id $text]"  if ($url eq "");
  } else {
    return "[$id]"  if ($url eq "");
    $text = &GetBracketUrlIndex($id);
  }
  $url .= $remotePage;
  if ($BracketImg && $useImage && &ImageAllowed($text)) {
    $text = "";
  } else {
    $text = "[$text]";
  }
  return &StoreRaw("$text");
}

sub GetBracketUrlIndex {
  my ($id) = @_;
  my ($index, $key);

  # Consider plain array?
  if ($SaveNumUrl{$id} > 0) {
    return $SaveNumUrl{$id};
  }
  $SaveNumUrlIndex++;  # Start with 1
  $SaveNumUrl{$id} = $SaveNumUrlIndex;
  return $SaveNumUrlIndex;
}

sub GetSiteUrl {
  my ($site) = @_;
  my ($data, $status);

  if (!$InterSiteInit) {
    ($status, $data) = &ReadFile($InterFile);
    if ($status) {
      %InterSite = split(/\s+/, $data);  # Consider defensive code
    }
    # Check for definitions to allow file to override automatic settings
    if (!defined($InterSite{'LocalWiki'})) {
      $InterSite{'LocalWiki'} = $ScriptName . &ScriptLinkChar();
    }
    if (!defined($InterSite{'Local'})) {
      $InterSite{'Local'} = $ScriptName . &ScriptLinkChar();
    }
    $InterSiteInit = 1;  # Init only once per request
  }
  return $InterSite{$site}  if (defined($InterSite{$site}));
  return '';
}

sub StoreRaw {
  my ($html) = @_;

  $SaveUrl{$SaveUrlIndex} = $html;
  return $FS . $SaveUrlIndex++ . $FS;
}

sub StorePre {
  my ($html, $tag) = @_;

  return &StoreRaw("<$tag>" . $html . "");
}

sub StoreHref {
  my ($anchor, $text) = @_;

  return "$text";
}

sub StoreUrl {
  my ($name, $useImage) = @_;
  my ($link, $extra);

  ($link, $extra) = &UrlLink($name, $useImage);
  # Next line ensures no empty links are stored
  $link = &StoreRaw($link)  if ($link ne "");
  return $link . $extra;
}

sub UrlLink {
  my ($rawname, $useImage) = @_;
  my ($name, $punct);

  ($name, $punct) = &SplitUrlPunct($rawname);
  if ($LimitFileUrl && ($NetworkFile && $name =~ m|^file:|)) {
    # Only do remote file:// links. No file:///c|/windows.
    if ($name =~ m|^file://[^/]|) {
      return ("$name", $punct);
    }
    return ($rawname, '');
  }
  return (&UrlLinkOrImage($name, $name, $useImage), $punct);
}

sub UrlLinkOrImage {
  my ($url, $name, $useImage) = @_;

  # Restricted image URLs so that mailto:foo@bar.gif is not an image
  if ($useImage && &ImageAllowed($url)) {
    return "";
  }
  return "$name";
}

sub ImageAllowed {
  my ($url) = @_;
  my ($site, $imagePrefixes);

  $imagePrefixes = 'http:|https:|ftp:';
  $imagePrefixes .= '|file:'  if (!$LimitFileUrl);
  return 0  unless ($url =~ /^($imagePrefixes).+\.$ImageExtensions$/);
  return 0  if ($url =~ /"/);      # No HTML-breaking quotes allowed
  return 1  if (@ImageSites < 1);  # Most common case: () means all allowed
  return 0  if ($ImageSites[0] eq 'none');  # Special case: none allowed
  foreach $site (@ImageSites) {
    return 1  if ($site eq substr($url, 0, length($site)));  # Match prefix
  }
  return 0;
}

sub StoreBracketUrl {
  my ($url, $text, $useImage) = @_;

  if ($text eq "") {
    $text = &GetBracketUrlIndex($url);
  }
  if ($BracketImg && $useImage && &ImageAllowed($text)) {
    $text = "";
  } else {
    $text = "[$text]";
  }
  return &StoreRaw("$text");
}

sub StoreBracketLink {
  my ($name, $text) = @_;

  return &StoreRaw(&GetPageLinkText($name, "[$text]"));
}

sub StoreBracketAnchoredLink {
  my ($name, $anchor, $text) = @_;

  return &StoreRaw(&GetPageLinkText("$name#$anchor", "[$text]"));
}

sub StorePageOrEditLink {
  my ($page, $name) = @_;

  if ($FreeLinks) {
    $page =~ s/^\s+//;      # Trim extra spaces
    $page =~ s/\s+$//;
    $page =~ s|\s*/\s*|/|;  # ...also before/after subpages
  }
  $name =~ s/^\s+//;
  $name =~ s/\s+$//;
  return &StoreRaw(&GetPageOrEditLink($page, $name));
}

sub StoreRFC {
  my ($num) = @_;

  return &StoreRaw(&RFCLink($num));
}

sub RFCLink {
  my ($num) = @_;

  return "RFC $num";
}

sub StoreUpload {
  my ($url) = @_;

  return &StoreRaw(&UploadLink($url));
}

sub UploadLink {
  my ($filename) = @_;
  my ($html, $url);
 
  return $filename  if ($UploadUrl eq '');  # No bad links if misconfigured
  $UploadUrl .= '/'  if (substr($UploadUrl, -1, 1) ne '/');  # End with /
  $url = $UploadUrl . $filename;
  $html = '';
  if (&ImageAllowed($url)) {
    $html .= 'upload:' . $filename . '';
  } else {
    $html .= 'upload:' . $filename;
  }
  $html .= '';
  return $html;
}

sub StoreISBN {
  my ($num) = @_;

  return &StoreRaw(&ISBNLink($num));
}

sub ISBNALink {
  my ($num, $pre, $post, $text) = @_;

  return '' . $text . '';
}

sub ISBNLink {
  my ($rawnum) = @_;
  my ($rawprint, $html, $num, $numSites, $i);

  $num = $rawnum;
  $rawprint = $rawnum;
  $rawprint =~ s/ +$//;
  $num =~ s/[- ]//g;
  $numSites = scalar @IsbnNames;  # Number of entries
  if ((length($num) != 10) || ($numSites < 1)) {
    return "ISBN $rawnum";
  }
  $html = &ISBNALink($num, $IsbnPre[0], $IsbnPost[0], 'ISBN ' . $rawprint);
  if ($numSites > 1) {
    $html .= ' (';
    $i = 1;
    while ($i < $numSites) {
      $html .= &ISBNALink($num, $IsbnPre[$i], $IsbnPost[$i], $IsbnNames[$i]);
      if ($i < ($numSites - 1)) {  # Not the last site
        $html .= ', ';
      }
      $i++;
    }
    $html .= ')';
  }
  $html .= " "  if ($rawnum =~ / $/);  # Add space if old ISBN had space.
  return $html;
}

sub SplitUrlPunct {
  my ($url) = @_;
  my ($punct);

  if ($url =~ s/\"\"$//) {
    return ($url, "");   # Delete double-quote delimiters here
  }
  $punct = "";
  if ($NewFS) {
    ($punct) = ($url =~ /([^a-zA-Z0-9\/\x80-\xff]+)$/);
    $url =~ s/([^a-zA-Z0-9\/\xc0-\xff]+)$//;
  } else {
    ($punct) = ($url =~ /([^a-zA-Z0-9\/\xc0-\xff]+)$/);
    $url =~ s/([^a-zA-Z0-9\/\xc0-\xff]+)$//;
  }
  return ($url, $punct);
}

sub StripUrlPunct {
  my ($url) = @_;
  my ($junk);

  ($url, $junk) = &SplitUrlPunct($url);
  return $url;
}

sub WikiHeadingNumber {
    my ($depth, $text) = @_;
    my ($anchor, $number);

    return '' unless --$depth > 0;  # Don't number H1s because it looks stupid
    while (scalar @HeadingNumbers < ($depth-1)) {
        push @HeadingNumbers, 1;
        $TableOfContents .= '
     
    ';
    }
    if (scalar @HeadingNumbers < $depth) {
        push @HeadingNumbers, 0;
        $TableOfContents .= '
     
    ';
    }
    while (scalar @HeadingNumbers > $depth) {
        pop @HeadingNumbers;
        $TableOfContents .= "
    \n\n";
    }
    $HeadingNumbers[$#HeadingNumbers]++;
    $number = (join '.', @HeadingNumbers) . '. ';
    # Remove embedded links. THIS IS FRAGILE!
    $text = &RestoreSavedText($text);
    $text =~ s/\]*?\>\?\<\/a\>//si; # No such page syntax
    $text =~ s/\]*?\>(.*?)\<\/a\>/$1/si;
    # Cook anchor by canonicalizing $text.
    $anchor = $text;
    $anchor =~ s/\<.*?\>//g; 
    $anchor =~ s/\W/_/g;   
    $anchor =~ s/__+/_/g;
    $anchor =~ s/^_//;
    $anchor =~ s/_$//;
    # Last ditch effort
    $anchor = '_' . (join '_', @HeadingNumbers) unless $anchor;
    $TableOfContents .= $number . &ScriptLink("$OpenPageName#$anchor",$text)
                        . "
    \n
     
    ";
    return &StoreHref(" name=\"$anchor\"") . $number;
}

sub WikiHeading {
  my ($pre, $depth, $text) = @_;

  $depth = length($depth);
  $depth = 6  if ($depth > 6);
  $text =~ s/^\s*#\s+/&WikiHeadingNumber($depth,$')/e; # $' == $POSTMATCH
  return $pre . "$text\n";
}

# ==== Difference markup and HTML ====
sub GetDiffHTML {
  my ($diffType, $id, $revOld, $revNew, $newText) = @_;
  my ($html, $diffText, $diffTextTwo, $priorName, $links, $usecomma);
  my ($major, $minor, $author, $useMajor, $useMinor, $useAuthor, $cacheName);

  $links = "(";
  $usecomma = 0;
  $major  = &ScriptLinkDiff(1, $id, T('major diff'), "");
  $minor  = &ScriptLinkDiff(2, $id, T('minor diff'), "");
  $author = &ScriptLinkDiff(3, $id, T('author diff'), "");
  $useMajor  = 1;
  $useMinor  = 1;
  $useAuthor = 1;
  $diffType = &GetParam("defaultdiff", 1)  if ($diffType == 4);
  if ($diffType == 1) {
    $priorName = T('major');
    $cacheName = 'major';
    $useMajor  = 0;
  } elsif ($diffType == 2) {
    $priorName = T('minor');
    $cacheName = 'minor';
    $useMinor  = 0;
  } elsif ($diffType == 3) {
    $priorName = T('author');
    $cacheName = 'author';
    $useAuthor = 0;
  }
  if ($revOld ne "") {
    # Note: OpenKeptRevisions must have been done by caller.
    # Eventually optimize if same as cached revision
    $diffText = &GetKeptDiff($newText, $revOld, 1);  # 1 = get lock
    if ($diffText eq "") {
      $diffText = T('(The revisions are identical or unavailable.)');
    }
  } else {
    $diffText  = &GetCacheDiff($cacheName);
  }
  $useMajor  = 0  if ($useMajor  && ($diffText eq &GetCacheDiff("major")));
  $useMinor  = 0  if ($useMinor  && ($diffText eq &GetCacheDiff("minor")));
  $useAuthor = 0  if ($useAuthor && ($diffText eq &GetCacheDiff("author")));
  $useMajor  = 0  if ((!defined(&GetPageCache('oldmajor'))) ||
                      (&GetPageCache("oldmajor") < 1));
  $useAuthor = 0  if ((!defined(&GetPageCache('oldauthor'))) ||
                      (&GetPageCache("oldauthor") < 1));
  if ($useMajor) {
    $links .= $major;
    $usecomma = 1;
  }
  if ($useMinor) {
    $links .= ", "  if ($usecomma);
    $links .= $minor;
    $usecomma = 1;
  }
  if ($useAuthor) {
    $links .= ", "  if ($usecomma);
    $links .= $author;
  }
  if (!($useMajor || $useMinor || $useAuthor)) {
    $links .= T('no other diffs');
  }
  $links .= ")";
  if ((!defined($diffText)) || ($diffText eq "")) {
    $diffText = T('No diff available.');
  }
  if ($revOld ne "") {
    my $currentRevision = T('current revision');
    $currentRevision = Ts('revision %s', $revNew) if $revNew;
    $html = ''
      . Tss("Difference (from revision %1 to %2)", $revOld, $currentRevision)
      . "\n" . "$links
    " . &DiffToHTML($diffText);
  } else {
    if (($diffType != 2) &&
        ((!defined(&GetPageCache("old$cacheName"))) ||
         (&GetPageCache("old$cacheName") < 1))) {
      $html = ''
              . Ts('No diff available--this is the first %s revision.',
                   $priorName) . "\n$links";
    } else {
      $html = ''
              . Ts('Difference (from prior %s revision)', $priorName)
              . "\n$links
    " . &DiffToHTML($diffText);
    }
  }
  @HeadingNumbers = ();
  $TableOfContents = '';
  return $html;
}

sub GetCacheDiff {
  my ($type) = @_;
  my ($diffText);

  $diffText = &GetPageCache("diff_default_$type");
  $diffText = &GetCacheDiff('minor')  if ($diffText eq "1");
  $diffText = &GetCacheDiff('major')  if ($diffText eq "2");
  return $diffText;
}

# Must be done after minor diff is set and OpenKeptRevisions called
sub GetKeptDiff {
  my ($newText, $oldRevision, $lock) = @_;
  my (%sect, %data, $oldText);

  $oldText = "";
  if (defined($KeptRevisions{$oldRevision})) {
    %sect = split(/$FS2/, $KeptRevisions{$oldRevision}, -1);
    %data = split(/$FS3/, $sect{'data'}, -1);
    $oldText = $data{'text'};
  }
  return ""  if ($oldText eq "");  # Old revision not found
  return &GetDiff($oldText, $newText, $lock);
}

sub GetDiff {
  my ($old, $new, $lock) = @_;
  my ($diff_out, $oldName, $newName);

  &CreateDir($TempDir);
  $oldName = "$TempDir/old_diff";
  $newName = "$TempDir/new_diff";
  if ($lock) {
    &RequestDiffLock() or return "";
    $oldName .= "_locked";
    $newName .= "_locked";
  }
  &WriteStringToFile($oldName, $old);
  &WriteStringToFile($newName, $new);
  $diff_out = `diff $oldName $newName`;
  &ReleaseDiffLock()  if ($lock);
  $diff_out =~ s/\\ No newline.*\n//g;   # Get rid of common complaint.
  # No need to unlink temp files--next diff will just overwrite.
  return $diff_out;
}

sub DiffToHTML {
  my ($html) = @_;
  my ($tChanged, $tRemoved, $tAdded);

  $tChanged = T('Changed:');
  $tRemoved = T('Removed:');
  $tAdded   = T('Added:');
  $html =~ s/\n--+//g;
  # Note: Need spaces before 
     to be different from diff section.
  $html =~ s/(^|\n)(\d+.*c.*)/$1 
    $tChanged $2<\/strong>
    /g;
  $html =~ s/(^|\n)(\d+.*d.*)/$1 
    $tRemoved $2<\/strong>
    /g;
  $html =~ s/(^|\n)(\d+.*a.*)/$1 
    $tAdded $2<\/strong>
    /g;
  $html =~ s/\n((<.*\n)+)/&ColorDiff($1, $DiffColor1, 0)/ge;
  $html =~ s/\n((>.*\n)+)/&ColorDiff($1, $DiffColor2, 1)/ge;
  return $html;
}

sub ColorDiff {
  my ($diff, $color, $type) = @_;
  my ($colorHtml, $classHtml);

  $diff =~ s/(^|\n)[<>]/$1/g;
  $diff = &QuoteHtml($diff);
  # Do some of the Wiki markup rules:
  %SaveUrl = ();
  %SaveNumUrl = ();
  $SaveUrlIndex = 0;
  $SaveNumUrlIndex = 0;
  $diff = &RemoveFS($diff);
  $diff = &CommonMarkup($diff, 0, 1);      # No images, all patterns
  if ($LateRules ne '') {
    $diff = &EvalLocalRules($LateRules, $diff, 1);
  }
  1 while $diff =~ s/$FS(\d+)$FS/$SaveUrl{$1}/ge;   # Restore saved text
  $diff =~ s/\r?\n/
    /g;
  $colorHtml = '';
  if ($color ne '') {
    $colorHtml = " bgcolor=$color";
  }
  if ($type) {
    $classHtml = ' class=wikidiffnew';
  } else {
    $classHtml = ' class=wikidiffold';
  }
  return "
    \n" . $diff
         . "
    \n";
}

# ==== Database (Page, Section, Text, Kept, User) functions ====
sub OpenNewPage {
  my ($id) = @_;

  %Page = ();
  $Page{'version'} = 3;      # Data format version
  $Page{'revision'} = 0;     # Number of edited times
  $Page{'tscreate'} = $Now;  # Set once at creation
  $Page{'ts'} = $Now;        # Updated every edit
}

sub OpenNewSection {
  my ($name, $data) = @_;

  %Section = ();
  $Section{'name'} = $name;
  $Section{'version'} = 1;      # Data format version
  $Section{'revision'} = 0;     # Number of edited times
  $Section{'tscreate'} = $Now;  # Set once at creation
  $Section{'ts'} = $Now;        # Updated every edit
  $Section{'ip'} = $ENV{REMOTE_ADDR};
  $Section{'host'} = '';        # Updated only for real edits (can be slow)
  $Section{'id'} = $UserID;
  $Section{'username'} = &GetParam("username", "");
  $Section{'data'} = $data;
  $Page{$name} = join($FS2, %Section);  # Replace with save?
}

sub OpenNewText {
  my ($name) = @_;  # Name of text (usually "default")
  %Text = ();
  if ($NewText ne '') {
    $Text{'text'} = T($NewText);
  } else {
    $Text{'text'} = T('Describe the new page here.') . "\n";
  }
  $Text{'text'} .= "\n"  if (substr($Text{'text'}, -1, 1) ne "\n");
  $Text{'minor'} = 0;      # Default as major edit
  $Text{'newauthor'} = 1;  # Default as new author
  $Text{'summary'} = '';
  &OpenNewSection("text_$name", join($FS3, %Text));
}

sub GetPageFile {
  my ($id) = @_;

  return $PageDir . "/" . &GetPageDirectory($id) . "/$id.db";
}

sub OpenPage {
  my ($id) = @_;
  my ($fname, $data);

  if ($OpenPageName eq $id) {
    return;
  }
  %Section = ();
  %Text = ();
  $fname = &GetPageFile($id);
  if (-f $fname) {
    $data = &ReadFileOrDie($fname);
    %Page = split(/$FS1/, $data, -1);  # -1 keeps trailing null fields
  } else {
    &OpenNewPage($id);
  }
  if ($Page{'version'} != 3) {
    &UpdatePageVersion();
  }
  $OpenPageName = $id;
}

sub OpenSection {
  my ($name) = @_;

  if (!defined($Page{$name})) {
    &OpenNewSection($name, "");
  } else {
    %Section = split(/$FS2/, $Page{$name}, -1);
  }
}

sub OpenText {
  my ($name) = @_;

  if (!defined($Page{"text_$name"})) {
    &OpenNewText($name);
  } else {
    &OpenSection("text_$name");
    %Text = split(/$FS3/, $Section{'data'}, -1);
  }
}

sub OpenDefaultText {
  &OpenText('default');
}

# Called after OpenKeptRevisions
sub OpenKeptRevision {
  my ($revision) = @_;

  %Section = split(/$FS2/, $KeptRevisions{$revision}, -1);
  %Text = split(/$FS3/, $Section{'data'}, -1);
}

sub GetPageCache {
  my ($name) = @_;

  return $Page{"cache_$name"};
}

# Always call SavePage within a lock.
sub SavePage {
  my $file = &GetPageFile($OpenPageName);

  $Page{'revision'} += 1;    # Number of edited times
  $Page{'ts'} = $Now;        # Updated every edit
  &CreatePageDir($PageDir, $OpenPageName);
  &WriteStringToFile($file, join($FS1, %Page));
}

sub SaveSection {
  my ($name, $data) = @_;

  $Section{'revision'} += 1;   # Number of edited times
  $Section{'ts'} = $Now;       # Updated every edit
  $Section{'ip'} = $ENV{REMOTE_ADDR};
  $Section{'id'} = $UserID;
  $Section{'username'} = &GetParam("username", "");
  $Section{'data'} = $data;
  $Page{$name} = join($FS2, %Section);
}

sub SaveText {
  my ($name) = @_;

  &SaveSection("text_$name", join($FS3, %Text));
}

sub SaveDefaultText {
  &SaveText('default');
}

sub SetPageCache {
  my ($name, $data) = @_;

  $Page{"cache_$name"} = $data;
}

sub UpdatePageVersion {
  &ReportError(T('Bad page version (or corrupt page).'));
}

sub KeepFileName {
  return $KeepDir . "/" . &GetPageDirectory($OpenPageName)
         . "/$OpenPageName.kp";
}

sub SaveKeepSection {
  my $file = &KeepFileName();
  my $data;

  return  if ($Section{'revision'} < 1);  # Don't keep "empty" revision
  $Section{'keepts'} = $Now;
  $data = $FS1 . join($FS2, %Section);
  &CreatePageDir($KeepDir, $OpenPageName);
  &AppendStringToFileLimited($file, $data, $KeepSize);
}

sub ExpireKeepFile {
  my ($fname, $data, @kplist, %tempSection, $expirets);
  my ($anyExpire, $anyKeep, $expire, %keepFlag, $sectName, $sectRev);
  my ($oldMajor, $oldAuthor);

  $fname = &KeepFileName();
  return  if (!(-f $fname));
  $data = &ReadFileOrDie($fname);
  @kplist = split(/$FS1/, $data, -1);  # -1 keeps trailing null fields
  return  if (length(@kplist) < 1);  # Also empty
  shift(@kplist)  if ($kplist[0] eq "");  # First can be empty
  return  if (length(@kplist) < 1);  # Also empty
  %tempSection = split(/$FS2/, $kplist[0], -1);
  if (!defined($tempSection{'keepts'})) {
    return;  # Bad keep file
  }
  $expirets = $Now - ($KeepDays * 24 * 60 * 60);
  return  if ($tempSection{'keepts'} >= $expirets);  # Nothing old enough
  $anyExpire = 0;
  $anyKeep   = 0;
  %keepFlag  = ();
  $oldMajor  = &GetPageCache('oldmajor');
  $oldAuthor = &GetPageCache('oldauthor');
  foreach (reverse @kplist) {
    %tempSection = split(/$FS2/, $_, -1);
    $sectName = $tempSection{'name'};
    $sectRev = $tempSection{'revision'};
    $expire = 0;
    if ($sectName eq "text_default") {
      if (($KeepMajor  && ($sectRev == $oldMajor)) ||
          ($KeepAuthor && ($sectRev == $oldAuthor))) {
        $expire = 0;
      } elsif ($tempSection{'keepts'} < $expirets) {
        $expire = 1;
      }
    } else {
      if ($tempSection{'keepts'} < $expirets) {
        $expire = 1;
      }
    }
    if (!$expire) {
      $keepFlag{$sectRev . "," . $sectName} = 1;
      $anyKeep = 1;
    } else {
      $anyExpire = 1;
    }
  }
  if (!$anyKeep) {  # Empty, so remove file
    unlink($fname);
    return;
  }
  return  if (!$anyExpire);  # No sections expired
  open (OUT, ">$fname") or die (Ts('cant write %s', $fname) . ": $!");
  foreach (@kplist) {
    %tempSection = split(/$FS2/, $_, -1);
    $sectName = $tempSection{'name'};
    $sectRev = $tempSection{'revision'};
    if ($keepFlag{$sectRev . "," . $sectName}) {
      print OUT $FS1, $_;
    }
  }
  close(OUT);
}

sub OpenKeptList {
  my ($fname, $data);

  @KeptList = ();
  $fname = &KeepFileName();
  return  if (!(-f $fname));
  $data = &ReadFileOrDie($fname);
  @KeptList = split(/$FS1/, $data, -1);  # -1 keeps trailing null fields
}

sub OpenKeptRevisions {
  my ($name) = @_;  # Name of section
  my ($fname, $data, %tempSection);

  %KeptRevisions = ();
  &OpenKeptList();
  foreach (@KeptList) {
    %tempSection = split(/$FS2/, $_, -1);
    next  if ($tempSection{'name'} ne $name);
    $KeptRevisions{$tempSection{'revision'}} = $_;
  }
}

sub LoadUserData {
  my ($data, $status);

  %UserData = ();
  ($status, $data) = &ReadFile(&UserDataFilename($UserID));
  if (!$status) {
    $UserID = 112;  # Could not open file.  Consider warning message?
    return;
  }
  %UserData = split(/$FS1/, $data, -1);  # -1 keeps trailing null fields
}

sub UserDataFilename {
  my ($id) = @_;

  return ""  if ($id < 1);
  return $UserDir . "/" . ($id % 10) . "/$id.db";
}

# ==== Misc. functions ====
sub ReportError {
  my ($errmsg) = @_;

  print $q->header, "
    ", $errmsg, "
    ", $q->end_html;
}

sub ValidId {
  my ($id) = @_;

  if (length($id) > 120) {
    return Ts('Page name is too long: %s', $id);
  }
  if ($id =~ m| |) {
    return Ts('Page name may not contain space characters: %s', $id);
  }
  if ($UseSubpage) {
    if ($id =~ m|.*/.*/|) {
      return Ts('Too many / characters in page %s', $id);
    }
    if ($id =~ /^\//) {
      return Ts('Invalid Page %s (subpage without main page)', $id);
    }
    if ($id =~ /\/$/) {
      return Ts('Invalid Page %s (missing subpage name)', $id);
    }
  }
  if ($FreeLinks) {
    $id =~ s/ /_/g;
    if (!$UseSubpage) {
      if ($id =~ /\//) {
        return Ts('Invalid Page %s (/ not allowed)', $id);
      }
    }
    if (!($id =~ m|^$FreeLinkPattern$|)) {
      return Ts('Invalid Page %s', $id);
    }
    if ($id =~ m|\.db$|) {
      return Ts('Invalid Page %s (must not end with .db)', $id);
    }
    if ($id =~ m|\.lck$|) {
      return Ts('Invalid Page %s (must not end with .lck)', $id);
    }
    return "";
  } else {
    if (!($id =~ /^$LinkPattern$/)) {
      return Ts('Invalid Page %s', $id);
    }
  }
  return "";
}

sub ValidIdOrDie {
  my ($id) = @_;
  my $error;

  $error = &ValidId($id);
  if ($error ne "") {
    &ReportError($error);
    return 0;
  }
  return 1;
}

sub UserCanEdit {
  my ($id, $deepCheck) = @_;

  # Optimized for the "everyone can edit" case (don't check passwords)
  if (($id ne "") && (-f &GetLockedPageFile($id))) {
    return 1  if (&UserIsAdmin());  # Requires more privledges
    # Consider option for editor-level to edit these pages?
    return 0;
  }
  if (!$EditAllowed) {
    return 1  if (&UserIsEditor());
    return 0;
  }
  if (-f "$DataDir/noedit") {
    return 1  if (&UserIsEditor());
    return 0;
  }
  if ($deepCheck) {   # Deeper but slower checks (not every page)
    return 1  if (&UserIsEditor());
    return 0  if (&UserIsBanned());
  }
  return 1;
}

sub UserIsBanned {
  my ($host, $ip, $data, $status);

  ($status, $data) = &ReadFile("$DataDir/banlist");
  return 0  if (!$status);  # No file exists, so no ban
  $data =~ s/\r//g;
  $ip = $ENV{'REMOTE_ADDR'};
  $host = &GetRemoteHost(0);
  foreach (split(/\n/, $data)) {
    next  if ((/^\s*$/) || (/^#/));  # Skip empty, spaces, or comments
    return 1  if ($ip   =~ /$_/i);
    return 1  if ($host =~ /$_/i);
  }
  return 0;
}

sub UserIsAdmin {
  my (@pwlist, $userPassword);

  return 0  if ($AdminPass eq "");
  $userPassword = &GetParam("adminpw", "");
  return 0  if ($userPassword eq "");
  foreach (split(/\s+/, $AdminPass)) {
    next  if ($_ eq "");
    return 1  if ($userPassword eq $_);
  }
  return 0;
}

sub UserIsEditor {
  my (@pwlist, $userPassword);

  return 1  if (&UserIsAdmin());             # Admin includes editor
  return 0  if ($EditPass eq "");
  $userPassword = &GetParam("adminpw", "");  # Used for both
  return 0  if ($userPassword eq "");
  foreach (split(/\s+/, $EditPass)) {
    next  if ($_ eq "");
    return 1  if ($userPassword eq $_);
  }
  return 0;
}

sub UserCanUpload {
  return 1  if (&UserIsEditor());
  return $AllUpload;
}

sub GetLockedPageFile {
  my ($id) = @_;

  return $PageDir . "/" . &GetPageDirectory($id) . "/$id.lck";
}

sub RequestLockDir {
  my ($name, $tries, $wait, $errorDie) = @_;
  my ($lockName, $n);

  &CreateDir($TempDir);
  $lockName = $LockDir . $name;
  $n = 0;
  while (mkdir($lockName, 0555) == 0) {
    if ($! != 17) {
      die(Ts('can not make %s', $LockDir) . ": $!\n")  if $errorDie;
      return 0;
    }
    return 0  if ($n++ >= $tries); 
    sleep($wait);
  }
  return 1;
}

sub ReleaseLockDir {
  my ($name) = @_;

  rmdir($LockDir . $name);
}

sub RequestLock {
  # 10 tries, 3 second wait, possibly die on error
  return &RequestLockDir("main", 10, 3, $LockCrash);
}

sub ReleaseLock {
  &ReleaseLockDir('main');
}

sub ForceReleaseLock {
  my ($name) = @_;
  my $forced;

  # First try to obtain lock (in case of normal edit lock)
  # 5 tries, 3 second wait, do not die on error
  $forced = !&RequestLockDir($name, 5, 3, 0);
  &ReleaseLockDir($name);  # Release the lock, even if we didn't get it.
  return $forced;
}

sub RequestCacheLock {
  # 4 tries, 2 second wait, do not die on error
  return &RequestLockDir('cache', 4, 2, 0);
}

sub ReleaseCacheLock {
  &ReleaseLockDir('cache');
}

sub RequestDiffLock {
  # 4 tries, 2 second wait, do not die on error
  return &RequestLockDir('diff', 4, 2, 0);
}

sub ReleaseDiffLock {
  &ReleaseLockDir('diff');
}

# Index lock is not very important--just return error if not available
sub RequestIndexLock {
  # 1 try, 2 second wait, do not die on error
  return &RequestLockDir('index', 1, 2, 0);
}

sub ReleaseIndexLock {
  &ReleaseLockDir('index');
}

sub ReadFile {
  my ($fileName) = @_;
  my ($data);
  local $/ = undef;   # Read complete files

  if (open(IN, "<$fileName")) {
    $data=;
    close IN;
    return (1, $data);
  }
  return (0, "");
}

sub ReadFileOrDie {
  my ($fileName) = @_;
  my ($status, $data);

  ($status, $data) = &ReadFile($fileName);
  if (!$status) {
    die(Ts('Can not open %s', $fileName) . ": $!");
  }
  return $data;
}

sub WriteStringToFile {
  my ($file, $string) = @_;

  open (OUT, ">$file") or die(Ts('cant write %s', $file) . ": $!");
  print OUT  $string;
  close(OUT);
}

sub AppendStringToFile {
  my ($file, $string) = @_;

  open (OUT, ">>$file") or die(Ts('cant write %s', $file) . ": $!");
  print OUT  $string;
  close(OUT);
}

sub AppendStringToFileLimited {
  my ($file, $string, $limit) = @_;

  if (($limit < 1) || (((-s $file) + length($string)) <= $limit)) {
    &AppendStringToFile($file, $string);
  }
}

sub CreateDir {
  my ($newdir) = @_;

  mkdir($newdir, 0775)  if (!(-d $newdir));
}

sub CreatePageDir {
  my ($dir, $id) = @_;
  my $subdir;

  &CreateDir($dir);  # Make sure main page exists
  $subdir = $dir . "/" . &GetPageDirectory($id);
  &CreateDir($subdir);
  if ($id =~ m|([^/]+)/|) {
    $subdir = $subdir . "/" . $1;
    &CreateDir($subdir);
  }
}

sub UpdateHtmlCache {
  my ($id, $html) = @_;
  my $idFile;

  $idFile = &GetHtmlCacheFile($id);
  &CreatePageDir($HtmlDir, $id);
  if (&RequestCacheLock()) {
    &WriteStringToFile($idFile, $html);
    &ReleaseCacheLock();
  }
}

sub GenerateAllPagesList {
  my (@pages, @dirs, $id, $dir, @pageFiles, @subpageFiles, $subId);

  @pages = ();
  if ($FastGlob) {
    # The following was inspired by the FastGlob code by Marc W. Mengel.
    # Thanks to Bob Showalter for pointing out the improvement.
    opendir(PAGELIST, $PageDir);
    @dirs = readdir(PAGELIST);
    closedir(PAGELIST);
    @dirs = sort(@dirs);
    foreach $dir (@dirs) {
      next  if (substr($dir, 0, 1) eq '.');   # No ., .., or .dirs or files
      opendir(PAGELIST, "$PageDir/$dir");
      @pageFiles = readdir(PAGELIST);
      closedir(PAGELIST);
      foreach $id (@pageFiles) {
        next  if (($id eq '.') || ($id eq '..'));
        if (substr($id, -3) eq '.db') {
          push(@pages, substr($id, 0, -3));
        } elsif (substr($id, -4) ne '.lck') {
          opendir(PAGELIST, "$PageDir/$dir/$id");
          @subpageFiles = readdir(PAGELIST);
          closedir(PAGELIST);
          foreach $subId (@subpageFiles) {
            if (substr($subId, -3) eq '.db') {
              push(@pages, "$id/" . substr($subId, 0, -3));
            }
          }
        }
      }
    }
  } else {
    # Old slow/compatible method.
    @dirs = qw(A B C D E F G H I J K L M N O P Q R S T U V W X Y Z other);
    foreach $dir (@dirs) {
      if (-e "$PageDir/$dir") {  # Thanks to Tim Holt
        while (<$PageDir/$dir/*.db $PageDir/$dir/*/*.db>) {
          s|^$PageDir/||;
          m|^[^/]+/(\S*).db|;
          $id = $1;
          push(@pages, $id);
        }
      }
    }
  }
  return sort(@pages);
}

sub AllPagesList {
  my ($rawIndex, $refresh, $status);

  if (!$UseIndex) {
    return &GenerateAllPagesList();
  }
  $refresh = &GetParam("refresh", 0);
  if ($IndexInit && !$refresh) {
    # Note for mod_perl: $IndexInit is reset for each query
    # Eventually consider some timestamp-solution to keep cache?
    return @IndexList;
  }
  if ((!$refresh) && (-f $IndexFile)) {
    ($status, $rawIndex) = &ReadFile($IndexFile);
    if ($status) {
      %IndexHash = split(/\s+/, $rawIndex);
      @IndexList = sort(keys %IndexHash);
      $IndexInit = 1;
      return @IndexList;
    }
    # If open fails just refresh the index
  }
  @IndexList = ();
  %IndexHash = ();
  @IndexList = &GenerateAllPagesList();
  foreach (@IndexList) {
    $IndexHash{$_} = 1;
  }
  $IndexInit = 1;  # Initialized for this run of the script
  # Try to write out the list for future runs
  &RequestIndexLock() or return @IndexList;
  &WriteStringToFile($IndexFile, join(" ", %IndexHash));
  &ReleaseIndexLock();
  return @IndexList;
}

sub CalcDay {
  my ($ts) = @_;

  $ts += $TimeZoneOffset;
  my ($sec, $min, $hour, $mday, $mon, $year) = localtime($ts);
  if ($NumberDates) {
    return ($year + 1900) . '-' . ($mon+1) . '-' . $mday;
  }
  return ("January", "February", "March", "April", "May", "June",
          "July", "August", "September", "October", "November",
          "December")[$mon]. " " . $mday . ", " . ($year+1900);
}

sub CalcTime {
  my ($ts) = @_;
  my ($ampm, $mytz);

  $ts += $TimeZoneOffset;
  my ($sec, $min, $hour, $mday, $mon, $year) = localtime($ts);
  $mytz = "";
  if (($TimeZoneOffset == 0) && ($ScriptTZ ne "")) {
    $mytz = " " . $ScriptTZ;
  }
  $ampm = "";
  if ($UseAmPm) {
    $ampm = " am";
    if ($hour > 11) {
      $ampm = " pm";
      $hour = $hour - 12;
    }
    $hour = 12   if ($hour == 0);
  }
  $min = "0" . $min   if ($min<10);
  return $hour . ":" . $min . $ampm . $mytz;
}

sub TimeToText {
  my ($t) = @_;

  return &CalcDay($t) . " " . &CalcTime($t);
}

sub GetParam {
  my ($name, $default) = @_;
  my $result;

  $result = $q->param($name);
  if (!defined($result)) {
    if (defined($UserData{$name})) {
      $result = $UserData{$name};
    } else {
      $result = $default;
    }
  }
  return $result;
}

sub GetHiddenValue {
  my ($name, $value) = @_;

  $q->param($name, $value);
  return $q->hidden($name);
}

sub GetRemoteHost {
  my ($doMask) = @_;
  my ($rhost, $iaddr);

  $rhost = $ENV{REMOTE_HOST};
  if ($UseLookup && ($rhost eq "")) {
    # Catch errors (including bad input) without aborting the script
    eval 'use Socket; $iaddr = inet_aton($ENV{REMOTE_ADDR});'
         . '$rhost = gethostbyaddr($iaddr, AF_INET)';
  }
  if ($rhost eq "") {
    $rhost = $ENV{REMOTE_ADDR};
  }
  $rhost = &GetMaskedHost($rhost)  if ($doMask);
  return $rhost;
}

sub FreeToNormal {
  my ($id) = @_;

  $id =~ s/ /_/g;
  $id = ucfirst($id)  if ($UpperFirst || $FreeUpper);
  if (index($id, '_') > -1) {  # Quick check for any space/underscores
    $id =~ s/__+/_/g;
    $id =~ s/^_//;
    $id =~ s/_$//;
    if ($UseSubpage) {
      $id =~ s|_/|/|g;
      $id =~ s|/_|/|g;
    }
  }
  if ($FreeUpper) {
    # Note that letters after ' are *not* capitalized
    if ($id =~ m|[-_.,\(\)/][a-z]|) {    # Quick check for non-canonical case
      $id =~ s|([-_.,\(\)/])([a-z])|$1 . uc($2)|ge;
    }
  }
  return $id;
}
#END_OF_BROWSE_CODE

# == Page-editing and other special-action code ========================
$OtherCode = ""; # Comment next line to always compile (slower)
#$OtherCode = <<'#END_OF_OTHER_CODE';

sub DoOtherRequest {
  my ($id, $action, $text, $search);

  $action = &GetParam("action", "");
  $id = &GetParam("id", "");
  if ($action ne "") {
    $action = lc($action);
    if      ($action eq "edit") {
      &DoEdit($id, 0, 0, "", 0)  if &ValidIdOrDie($id);
    } elsif ($action eq "unlock") {
      &DoUnlock();
    } elsif ($action eq "index") {
      &DoIndex();
    } elsif ($action eq "links") {
      &DoLinks();
    } elsif ($action eq "maintain") {
      &DoMaintain();
    } elsif ($action eq "pagelock") {
      &DoPageLock();
    } elsif ($action eq "editlock") {
      &DoEditLock();
    } elsif ($action eq "editprefs") {
      &DoEditPrefs();
    } elsif ($action eq "editbanned") {
      &DoEditBanned();
    } elsif ($action eq "editlinks") {
      &DoEditLinks();
    } elsif ($action eq "login") {
      &DoEnterLogin();
    } elsif ($action eq "newlogin") {
      $UserID = 0;
      &DoEditPrefs();  # Also creates new ID
    } elsif ($action eq "version") {
      &DoShowVersion();
    } elsif ($action eq "rss") {
      &DoRss();
    } elsif ($action eq "delete") {
      &DoDeletePage($id);
    } elsif ($UseUpload && ($action eq "upload")) {
      &DoUpload();
    } elsif ($action eq "maintainrc") {
      &DoMaintainRc();
    } elsif ($action eq "convert") {
      &DoConvert();
    } elsif ($action eq "trimusers") {
      &DoTrimUsers();
    } else {
      &ReportError(Ts('Invalid action parameter %s', $action));
    }
    return;
  }
  if (&GetParam("edit_prefs", 0)) {
    &DoUpdatePrefs();
    return;
  }
  if (&GetParam("edit_ban", 0)) {
    &DoUpdateBanned();
    return;
  }
  if (&GetParam("enter_login", 0)) {
    &DoLogin();
    return;
  }
  if (&GetParam("edit_links", 0)) {
    &DoUpdateLinks();
    return;
  }
  if ($UseUpload && (&GetParam("upload", 0))) {
    &SaveUpload();
    return;
  }
  $search = &GetParam("search", "");
  if (($search ne "") || (&GetParam("dosearch", "") ne "")) {
    &DoSearch($search);
    return;
  } else {
    $search = &GetParam("back","");
    if ($search ne "") {
      &DoBackLinks($search);
      return;
    }
  }
  # Handle posted pages
  if (&GetParam("oldtime", "") ne "") {
    $id = &GetParam("title", "");
    &DoPost()  if &ValidIdOrDie($id);
    return;
  }
  &ReportError(T('Invalid URL.'));
}

sub DoEdit {
  my ($id, $isConflict, $oldTime, $newText, $preview) = @_;
  my ($header, $editRows, $editCols, $userName, $revision, $oldText);
  my ($summary, $isEdit, $pageTime);

  if ($FreeLinks) {
    $id = &FreeToNormal($id);  # Take care of users like Markus Lude :-)
  }
  if (!&UserCanEdit($id, 1)) {
    print &GetHeader("", T('Editing Denied'), "");
    if (&UserIsBanned()) {
      print T('Editing not allowed: user, ip, or network is blocked.');
      print "
    ";
      print T('Contact the wiki administrator for more information.');
    } else {
      print Ts('Editing not allowed: %s is read-only.', $SiteName);
    }
    print &GetCommonFooter();
    return;
  }
  # Consider sending a new user-ID cookie if user does not have one
  &OpenPage($id);
  &OpenDefaultText();
  $pageTime = $Section{'ts'};
  $header = Ts('Editing %s', $id);
  # Old revision handling
  $revision = &GetParam('revision', '');
  $revision =~ s/\D//g;  # Remove non-numeric chars
  if ($revision ne '') {
    &OpenKeptRevisions('text_default');
    if (!defined($KeptRevisions{$revision})) {
      $revision = '';
      # Consider better solution like error message?
    } else {
      &OpenKeptRevision($revision);
      $header = Ts('Editing revision %s of ', $revision ) . $id;
    }
  }
  $oldText = $Text{'text'};
  if ($preview && !$isConflict) {
    $oldText = $newText;
  }
  $editRows = &GetParam("editrows", 20);
  $editCols = &GetParam("editcols", 65);
  print &GetHeader('', &QuoteHtml($header), '');
  if ($revision ne '') {
    print "\n"
          . Ts('Editing old revision %s.', $revision) . "  "
    . T('Saving this page will replace the latest revision with this text.')
          . '
    '
  }
  if ($isConflict) {
    $editRows -= 10  if ($editRows > 19);
    print "\n
    " . T('Edit Conflict!') . "
    \n";
    if ($isConflict>1) {
      # The main purpose of a new warning is to display more text
      # and move the save button down from its old location.
      print "\n
    " . T('(This is a new conflict)') . "
    \n";
    }
    print "
    ",
          T('Someone saved this page after you started editing.'), " ",
          T('The top textbox contains the saved text.'), " ",
          T('Only the text in the top textbox will be saved.'),
          "
    \n",
          T('Scroll down to see your edited text.'), "
    \n";
    print T('Last save time:'), ' ', &TimeToText($oldTime),
          " (", T('Current time is:'), ' ', &TimeToText($Now), ")
    \n";
  }
  print &GetFormStart();
  print &GetHiddenValue("title", $id), "\n",
        &GetHiddenValue("oldtime", $pageTime), "\n",
        &GetHiddenValue("oldconflict", $isConflict), "\n";
  if ($revision ne "") {
    print &GetHiddenValue("revision", $revision), "\n";
  }
  print &GetTextArea('text', $oldText, $editRows, $editCols);
  $summary = &GetParam("summary", "*");
  print "
    ", T('Summary:'),
        $q->textfield(-name=>'summary',
                      -default=>$summary, -override=>1,
                      -size=>60, -maxlength=>200);
  if (&GetParam("recent_edit") eq "on") {
    print "
    ", $q->checkbox(-name=>'recent_edit', -checked=>1,
                               -label=>T('This change is a minor edit.'));
  } else {
    print "
    ", $q->checkbox(-name=>'recent_edit',
                               -label=>T('This change is a minor edit.'));
  }
  if ($EmailNotify) {
    print "   " .
           $q->checkbox(-name=> 'do_email_notify',
      -label=>Ts('Send email notification that %s has been changed.', $id));
  }
  print "
    ";
  if ($EditNote ne '') {
    print T($EditNote) . '
    ';  # Allow translation
  }
  print $q->submit(-name=>'Save', -value=>T('Save')), "\n";
  $userName = &GetParam("username", "");
  if ($userName ne "") {
    print ' (', T('Your user name is'), ' ',
          &GetPageLink($userName) . ') ';
  } else {
    print ' (', Ts('Visit %s to set your user name.', &GetPrefsLink()), ') ';
  }
  print $q->submit(-name=>'Preview', -value=>T('Preview')), "\n";
  if ($isConflict) {
    print "\n
    ", T('This is the text you submitted:'),
          "
    ",
          &GetTextArea('newtext', $newText, $editRows, $editCols),
          "
    \n";
  }
  print "
    \n";
  if ($preview) {
    print '
    ';
    print "
    ", T('Preview:'), "
    \n";
    if ($isConflict) {
      print "",
            T('NOTE: This preview shows the revision of the other author.'),
            "
    \n";
    }
    $MainPage = $id;
    $MainPage =~ s|/.*||;  # Only the main page name (remove subpage)
    print &WikiToHTML($oldText) . "
    \n";
    print "
    ", T('Preview only, not yet saved'), "
    \n";
    print '
    ';
  }
  print '
    ';
  print &GetHistoryLink($id, T('View other revisions')) . "
    \n";
  print &GetGotoBar($id);
  print $q->endform;
  print '
    ';
  print &GetMinimumFooter();
}

sub GetTextArea {
  my ($name, $text, $rows, $cols) = @_;

  if (&GetParam("editwide", 1)) {
    return $q->textarea(-name=>$name, -default=>$text,
                        -rows=>$rows, -columns=>$cols, -override=>1,
                        -style=>'width:100%', -wrap=>'virtual');
  }
  return $q->textarea(-name=>$name, -default=>$text,
                      -rows=>$rows, -columns=>$cols, -override=>1,
                      -wrap=>'virtual');
}

sub DoEditPrefs {
  my ($check, $recentName, %labels);

  $recentName = $RCName;
  $recentName =~ s/_/ /g;
  &DoNewLogin()  if ($UserID < 400);
  print &GetHeader('', T('Editing Preferences'), "");
  print '
    ';
  print &GetFormStart();
  print GetHiddenValue("edit_prefs", 1), "\n";
  print '' . T('User Information:') . "\n";
  print '
    ' . Ts('Your User ID number: %s', $UserID) . "\n";
  print '
    ' . T('UserName:') . ' ', &GetFormText('username', "", 20, 50);
  print ' ' . T('(blank to remove, or valid page name)');
  print '
    ' . T('Set Password:') . ' ',
        $q->password_field(-name=>'p_password', -value=>'*', 
                           -size=>15, -maxlength=>50),
        ' ', T('(blank to remove password)'), '
    (',
        T('Passwords allow sharing preferences between multiple systems.'),
        ' ', T('Passwords are completely optional.'), ')';
  if (($AdminPass ne '') || ($EditPass ne '')) {
    print '
    ', T('Administrator Password:'), ' ',
          $q->password_field(-name=>'p_adminpw', -value=>'*', 
                             -size=>15, -maxlength=>50),
          ' ', T('(blank to remove password)'), '
    ',
          T('(Administrator passwords are used for special maintenance.)');
  }
  if ($EmailNotify) {
    print "
    ";
    print &GetFormCheck('notify', 1,
          T('Include this address in the site email list.')), ' ',
          T('(Uncheck the box to remove the address.)');
    print '
    ', T('Email Address:'), ' ',
          &GetFormText('email', "", 30, 60);
  }
  print "
    $recentName:\n";
  print '
    ', T('Default days to display:'), ' ',
        &GetFormText('rcdays', $RcDefault, 4, 9);
  print "
    ", &GetFormCheck('rcnewtop', $RecentTop,
                              T('Most recent changes on top'));
  print "
    ", &GetFormCheck('rcall', 0,
                              T('Show all changes (not just most recent)'));
  %labels = (0=>T('Hide minor edits'), 1=>T('Show minor edits'),
             2=>T('Show only minor edits'));
  print '
    ', T('Minor edit display:'), ' ';
  print $q->popup_menu(-name=>'p_rcshowedit',
                       -values=>[0,1,2], -labels=>\%labels,
                       -default=>&GetParam("rcshowedit", $ShowEdits));
  print "
    ", &GetFormCheck('rcchangehist', 1,
                              T('Use "changes" as link to history'));
  if ($UseDiff) {
    print '
    ', T('Differences:'), "\n";
    print "
    ", &GetFormCheck('diffrclink', 1,
                                Ts('Show (diff) links on %s', $recentName));
    print "
    ", &GetFormCheck('alldiff', 0,
                                T('Show differences on all pages'));
    print "  (",  &GetFormCheck('norcdiff', 1,
                                Ts('No differences on %s', $recentName)), ")";
    %labels = (1=>T('Major'), 2=>T('Minor'), 3=>T('Author'));
    print '
    ', T('Default difference type:'), ' ';
    print $q->popup_menu(-name=>'p_defaultdiff',
                         -values=>[1,2,3], -labels=>\%labels,
                         -default=>&GetParam("defaultdiff", 1));
  }
  print '
    ', T('Misc:'), "\n";
  # Note: TZ offset is added by TimeToText, so pre-subtract to cancel.
  print '
    ', T('Server time:'), ' ', &TimeToText($Now-$TimeZoneOffset);
  print '
    ', T('Time Zone offset (hours):'), ' ',
        &GetFormText('tzoffset', 0, 4, 9);
  print '
    ', &GetFormCheck('editwide', 1,
                              T('Use 100% wide edit area (if supported)'));
  print '
    ',
        T('Edit area rows:'), ' ', &GetFormText('editrows', 20, 4, 4),
        ' ', T('columns:'),   ' ', &GetFormText('editcols', 65, 4, 4);

  print '
    ', &GetFormCheck('toplinkbar', 1,
                              T('Show link bar on top'));
  print '
    ', &GetFormCheck('linkrandom', 0,
                              T('Add "Random Page" link to link bar'));
  print '
    ' . T('StyleSheet URL:') . ' ',
        &GetFormText('stylesheet', "", 30, 150);
  print '
    ', $q->submit(-name=>'Save', -value=>T('Save')), "\n";
  print '
    ';
  print "
    \n";
  print '
    ';
  print &GetGotoBar('');
  print $q->endform;
  print '
    ';
  print &GetMinimumFooter();
}

sub GetFormText {
  my ($name, $default, $size, $max) = @_;
  my $text = &GetParam($name, $default);

  return $q->textfield(-name=>"p_$name", -default=>$text,
                       -override=>1, -size=>$size, -maxlength=>$max);
}

sub GetFormCheck {
  my ($name, $default, $label) = @_;
  my $checked = (&GetParam($name, $default) > 0);

  return $q->checkbox(-name=>"p_$name", -override=>1, -checked=>$checked,
                      -label=>$label);
}

sub DoUpdatePrefs {
  my ($username, $password, $stylesheet);

  # All link bar settings should be updated before printing the header
  &UpdatePrefCheckbox("toplinkbar");
  &UpdatePrefCheckbox("linkrandom");
  print &GetHeader('',T('Saving Preferences'), '');
  print '
    ';
  if ($UserID < 1001) {
    print '',
          Ts('Invalid UserID %s, preferences not saved.', $UserID), '';
    if ($UserID == 111) {
      print '
    ',
            T('(Preferences require cookies, but no cookie was sent.)');
    }
    print &GetCommonFooter();
    return;
  }
  $username = &GetParam("p_username",  "");
  if ($FreeLinks) {
    $username =~ s/^\[\[(.+)\]\]/$1/;  # Remove [[ and ]] if added
    $username =  &FreeToNormal($username);
    $username =~ s/_/ /g;
  }
  if ($username eq "") {
    print T('UserName removed.'), '
    ';
    undef $UserData{'username'};
  } elsif ((!$FreeLinks) && (!($username =~ /^$LinkPattern$/))) {
    print Ts('Invalid UserName %s: not saved.', $username), "
    \n";
  } elsif ($FreeLinks && (!($username =~ /^$FreeLinkPattern$/))) {
    print Ts('Invalid UserName %s: not saved.', $username), "
    \n";
  } elsif (length($username) > 50) {  # Too long
    print T('UserName must be 50 characters or less. (not saved)'), "
    \n";
  } else {
    print Ts('UserName %s saved.', $username), '
    ';
    $UserData{'username'} = $username;
  }
  $password = &GetParam("p_password",  "");
  if ($password eq "") {
    print T('Password removed.'), '
    ';
    undef $UserData{'password'};
  } elsif ($password ne "*") {
    print T('Password changed.'), '
    ';
    $UserData{'password'} = $password;
  }
  if (($AdminPass ne "") || ($EditPass ne "")) {
    $password = &GetParam("p_adminpw",  "");
    if ($password eq "") {
      print T('Administrator password removed.'), '
    ';
      undef $UserData{'adminpw'};
    } elsif ($password ne "*") {
      print T('Administrator password changed.'), '
    ';
      $UserData{'adminpw'} = $password;
      if (&UserIsAdmin()) {
        print T('User has administrative abilities.'), '
    ';
      } elsif (&UserIsEditor()) {
        print T('User has editor abilities.'), '
    ';
      } else {
        print T('User does not have administrative abilities.'), ' ',
              T('(Password does not match administrative password(s).)'),
              '
    ';
      }
    }
  }
  if ($EmailNotify) {
    &UpdatePrefCheckbox("notify");
    &UpdateEmailList();
  }
  &UpdatePrefNumber("rcdays", 0, 0, 999999);
  &UpdatePrefCheckbox("rcnewtop");
  &UpdatePrefCheckbox("rcall");
  &UpdatePrefCheckbox("rcchangehist");
  &UpdatePrefCheckbox("editwide");
  if ($UseDiff) {
    &UpdatePrefCheckbox("norcdiff");
    &UpdatePrefCheckbox("diffrclink");
    &UpdatePrefCheckbox("alldiff");
    &UpdatePrefNumber("defaultdiff", 1, 1, 3);
  }
  &UpdatePrefNumber("rcshowedit", 1, 0, 2);
  &UpdatePrefNumber("tzoffset", 0, -999, 999);
  &UpdatePrefNumber("editrows", 1, 1, 999);
  &UpdatePrefNumber("editcols", 1, 1, 999);
  print T('Server time:'), ' ', &TimeToText($Now-$TimeZoneOffset), '
    ';
  $TimeZoneOffset = &GetParam("tzoffset", 0) * (60 * 60);
  print T('Local time:'), ' ', &TimeToText($Now), '
    ';
  $stylesheet = &GetParam('p_stylesheet', '');
  if ($stylesheet eq '') {
    if (&GetParam('stylesheet', '') ne '') {
      print T('StyleSheet URL removed.'), '
    ';
    }
    undef $UserData{'stylesheet'};
  } else {
    $stylesheet =~ s/[">]//g;  # Remove characters that would cause problems
    $UserData{'stylesheet'} = $stylesheet;
    print T('StyleSheet setting saved.'), '
    ';
  }
  &SaveUserData();
  print '', T('Preferences saved.'), '';
  print &GetCommonFooter();
}

# add or remove email address from preferences to $EmailFile
sub UpdateEmailList {
  my (@old_emails);

  local $/ = "\n";  # don't slurp whole files in this sub.
  if (my $new_email = $UserData{'email'} = &GetParam("p_email", "")) {
    my $notify = $UserData{'notify'};
    if (-f $EmailFile) {
      open(NOTIFY, $EmailFile)
        or die(Ts('Could not read from %s:', $EmailFile) . " $!\n");
      @old_emails = ;
      close(NOTIFY);
    } else {
      @old_emails = ();
    }
    my $already_in_list = grep /$new_email/, @old_emails;
    if ($notify and (not $already_in_list)) {
      &RequestLock() or die(T('Could not get mail lock'));
      if (!open(NOTIFY, ">>$EmailFile")) {
        &ReleaseLock();  # Don't leave hangling locks
        die(Ts('Could not append to %s:', $EmailFile) . " $!\n");
      }
      print NOTIFY $new_email, "\n";
      close(NOTIFY);
      &ReleaseLock();
    }
    elsif ((not $notify) and $already_in_list) {
      &RequestLock() or die(T('Could not get mail lock'));
      if (!open(NOTIFY, ">$EmailFile")) {
        &ReleaseLock();
        die(Ts('Could not overwrite %s:', "$EmailFile") . " $!\n");
      }
      foreach (@old_emails) {
        print NOTIFY "$_" unless /$new_email/;
      }
      close(NOTIFY);
      &ReleaseLock();
    }
  }
}

sub UpdatePrefCheckbox {
  my ($param) = @_;
  my $temp = &GetParam("p_$param", "*");

  $UserData{$param} = 1  if ($temp eq "on");
  $UserData{$param} = 0  if ($temp eq "*");
  # It is possible to skip updating by using another value, like "2"
}

sub UpdatePrefNumber {
  my ($param, $integer, $min, $max) = @_;
  my $temp = &GetParam("p_$param", "*");

  return  if ($temp eq "*");
  $temp =~ s/[^-\d\.]//g;
  $temp =~ s/\..*//  if ($integer);
  return  if ($temp eq "");
  return  if (($temp < $min) || ($temp > $max));
  $UserData{$param} = $temp;
}

sub DoIndex {
  print &GetHeader('', T('Index of all pages'), '');
  print '
    ';
  &PrintPageList(&AllPagesList());
  print &GetCommonFooter();
}

# Create a new user file/cookie pair
sub DoNewLogin {
  # Consider warning if cookie already exists
  # (maybe use "replace=1" parameter)
  &CreateUserDir();
  $SetCookie{'id'} = &GetNewUserId();
  $SetCookie{'randkey'} = int(rand(1000000000));
  $SetCookie{'rev'} = 1;
  %UserCookie = %SetCookie;
  $UserID = $SetCookie{'id'};
  # The cookie will be transmitted in the next header
  %UserData = %UserCookie;
  $UserData{'createtime'} = $Now;
  $UserData{'createip'} = $ENV{REMOTE_ADDR};
  &SaveUserData();
}

sub DoEnterLogin {
  print &GetHeader('', T('Login'), "");
  print &GetFormStart();
  print &GetHiddenValue('enter_login', 1), "\n";
  print '
    ', T('User ID number:'), ' ',
        $q->textfield(-name=>'p_userid', -value=>'',
                      -size=>15, -maxlength=>50);
  print '
    ', T('Password:'), ' ',
        $q->password_field(-name=>'p_password', -value=>'', 
                           -size=>15, -maxlength=>50);
  print '
    ', $q->submit(-name=>'Login', -value=>T('Login')), "\n";
  print "
    \n";
  print &GetGotoBar('');
  print $q->endform;
  print &GetMinimumFooter();
}

sub DoLogin {
  my ($uid, $password, $success);

  $success = 0;
  $uid = &GetParam("p_userid", "");
  $uid =~ s/\D//g;
  $password = &GetParam("p_password",  "");
  if (($uid > 199) && ($password ne "") && ($password ne "*")) {
    $UserID = $uid;
    &LoadUserData();
    if ($UserID > 199) {
      if (defined($UserData{'password'}) &&
          ($UserData{'password'} eq $password)) {
        $SetCookie{'id'} = $uid;
        $SetCookie{'randkey'} = $UserData{'randkey'};
        $SetCookie{'rev'} = 1;
        $success = 1;
      }
    }
  }
  print &GetHeader('', T('Login Results'), '');
  if ($success) {
    print Ts('Login for user ID %s complete.', $uid);
  } else {
    print Ts('Login for user ID %s failed.', $uid);
  }
  print "
    \n";
  print &GetGotoBar('');
  print $q->endform;
  print &GetMinimumFooter();
}

sub GetNewUserId {
  my ($id);

  $id = $StartUID;
  while (-f &UserDataFilename($id+1000)) {
    $id += 1000;
  }
  while (-f &UserDataFilename($id+100)) {
    $id += 100;
  }
  while (-f &UserDataFilename($id+10)) {
    $id += 10;
  }
  &RequestLock() or die(T('Could not get user-ID lock'));
  while (-f &UserDataFilename($id)) {
    $id++;
  }
  &WriteStringToFile(&UserDataFilename($id), "lock");  # reserve the ID
  &ReleaseLock();
  return $id;
}

# Consider user-level lock?
sub SaveUserData {
  my ($userFile, $data);

  &CreateUserDir();
  $userFile = &UserDataFilename($UserID);
  $data = join($FS1, %UserData);
  &WriteStringToFile($userFile, $data);
}

sub CreateUserDir {
  my ($n, $subdir);

  if (!(-d "$UserDir/0")) {
    &CreateDir($UserDir);

    foreach $n (0..9) {
      $subdir = "$UserDir/$n";
      &CreateDir($subdir);
    }
  }
}

sub DoSearch {
  my ($string) = @_;

  if ($string eq '') {
    &DoIndex();
    return;
  }
  print &GetHeader('', &QuoteHtml(Ts('Search for: %s', $string)), '');
  print '
    ';
  &PrintPageList(&SearchTitleAndBody($string));
  print &GetCommonFooter();
}

sub DoBackLinks {
  my ($string) = @_;

  print &GetHeader('', &QuoteHtml(Ts('Backlinks for: %s', $string)), '');
  print '
    ';
  # At this time the backlinks are mostly a renamed search.
  # An initial attempt to match links only failed on subpages and free links.
  # Escape some possibly problematic characters:
  $string =~ s/([-'().,])/\\$1/g; 
  &PrintPageList(&SearchTitleAndBody($string));
  print &GetCommonFooter();
}

sub PrintPageList {
  my $pagename;

  print "
    ", Ts('%s pages found:', ($#_ + 1)), "
    \n";
  foreach $pagename (@_) {
    print ".... "  if ($pagename =~ m|/|);
    print &GetPageLink($pagename), "
    \n";
  }
}

sub DoLinks {
  print &GetHeader('', &QuoteHtml(T('Full Link List')), '');
  print "
    \n\n\n\n\n";  # Extra lines to get below the logo
  &PrintLinkList(&GetFullLinkList());
  print "
    \n";
  print &GetMinimumFooter();
}

sub PrintLinkList {
  my ($pagelines, $page, $names, $editlink);
  my ($link, $extra, @links, %pgExists);

  %pgExists = ();
  foreach $page (&AllPagesList()) {
    $pgExists{$page} = 1;
  }
  $names = &GetParam("names", 1);
  $editlink = &GetParam("editlink", 0);
  foreach $pagelines (@_) {
    @links = ();
    foreach $page (split(' ', $pagelines)) {
      if ($page =~ /\:/) {  # URL or InterWiki form
        if ($page =~ /$UrlPattern/) {
          ($link, $extra) = &UrlLink($page, 0);  # No images
        } else {
          ($link, $extra) = &InterPageLink($page, 0);  # No images
        }
      } else {
        if ($pgExists{$page}) {
          $link = &GetPageLink($page);
        } else {
          $link = $page;
          if ($editlink) {
            $link .= &GetEditLink($page, "?");
          }
        }
      }
      push(@links, $link);
    }
    if (!$names) {
      shift(@links);
    }
    print join(' ', @links), "\n";
  }
}

sub GetFullLinkList {
  my ($name, $unique, $sort, $exists, $empty, $link, $search);
  my ($pagelink, $interlink, $urllink);
  my (@found, @links, @newlinks, @pglist, %pgExists, %seen);

  $unique = &GetParam("unique", 1);
  $sort = &GetParam("sort", 1);
  $pagelink = &GetParam("page", 1);
  $interlink = &GetParam("inter", 0);
  $urllink = &GetParam("url", 0);
  $exists = &GetParam("exists", 2);
  $empty = &GetParam("empty", 0);
  $search = &GetParam("search", "");
  if (($interlink == 2) || ($urllink == 2)) {
    $pagelink = 0;
  }
  %pgExists = ();
  @pglist = &AllPagesList();
  foreach $name (@pglist) {
    $pgExists{$name} = 1;
  }
  %seen = ();
  foreach $name (@pglist) {
    @newlinks = ();
    if ($unique != 2) {
      %seen = ();
    }
    @links = &GetPageLinks($name, $pagelink, $interlink, $urllink);
    foreach $link (@links) {
      $seen{$link}++;
      if (($unique > 0) && ($seen{$link} != 1)) {
        next;
      }
      if (($exists == 0) && ($pgExists{$link} == 1)) {
        next;
      }
      if (($exists == 1) && ($pgExists{$link} != 1)) {
        next;
      }
      if (($search ne "") && !($link =~ /$search/)) {
        next;
      }
      push(@newlinks, $link);
    }
    @links = @newlinks;
    if ($sort) {
      @links = sort(@links);
    }
    unshift (@links, $name);
    if ($empty || ($#links > 0)) {  # If only one item, list is empty.
      push(@found, join(' ', @links));
    }
  }
  return @found;
}

sub GetPageLinks {
  my ($name, $pagelink, $interlink, $urllink) = @_;
  my ($text, @links);

  @links = ();
  &OpenPage($name);
  &OpenDefaultText();
  $text = $Text{'text'};
  $text =~ s/((.|\n)*?)<\/html>/ /ig;
  $text =~ s/(.|\n)*?\<\/nowiki>/ /ig;
  $text =~ s/
    (.|\n)*?\<\/pre>/ /ig;
  $text =~ s/(.|\n)*?\<\/code>/ /ig;
  if ($interlink) {
    $text =~ s/''+/ /g;  # Quotes can adjacent to inter-site links
    $text =~ s/$InterLinkPattern/push(@links, &StripUrlPunct($1)), ' '/ge;
  } else {
    $text =~ s/$InterLinkPattern/ /g;
  }
  if ($urllink) {
    $text =~ s/''+/ /g;  # Quotes can adjacent to URLs
    $text =~ s/$UrlPattern/push(@links, &StripUrlPunct($1)), ' '/ge;
  } else {
    $text =~ s/$UrlPattern/ /g;
  }
  if ($pagelink) {
    if ($FreeLinks) {
      my $fl = $FreeLinkPattern;
      $text =~ s/\[\[$fl\|[^\]]+\]\]/push(@links, &FreeToNormal($1)), ' '/ge;
      $text =~ s/\[\[$fl\]\]/push(@links, &FreeToNormal($1)), ' '/ge;
    }
    if ($WikiLinks) {
      $text =~ s/$LinkPattern/push(@links, &StripUrlPunct($1)), ' '/ge;
    }
  }
  return @links;
}

sub DoPost {
  my ($editDiff, $old, $newAuthor, $pgtime, $oldrev, $preview, $user);
  my $string = &GetParam("text", undef);
  my $id = &GetParam("title", "");
  my $summary = &GetParam("summary", "");
  my $oldtime = &GetParam("oldtime", "");
  my $oldconflict = &GetParam("oldconflict", "");
  my $isEdit = 0;
  my $editTime = $Now;
  my $authorAddr = $ENV{REMOTE_ADDR};

  if (!&UserCanEdit($id, 1)) {
    # This is an internal interface--we don't need to explain
    &ReportError(Ts('Editing not allowed for %s.', $id));
    return;
  }
  if (($id eq   'SampleUndefinedPage')    ||
      ($id eq T('SampleUndefinedPage'))   ||
      ($id eq   'Sample_Undefined_Page')  ||
      ($id eq T('Sample_Undefined_Page'))) {
    &ReportError(Ts('%s cannot be defined.', $id));
    return;
  }
  $string  = &RemoveFS($string);
  $summary = &RemoveFS($summary);
  $summary =~ s/[\r\n]//g;
  if (length($summary) > 300) {  # Too long (longer than form allows)
    $summary = substr($summary, 0, 300);
  }
  # Add a newline to the end of the string (if it doesn't have one)
  $string .= "\n"  if (!($string =~ /\n$/));
  # Lock before getting old page to prevent races
  # Consider extracting lock section into sub, and eval-wrap it?
  # (A few called routines can die, leaving locks.)
  if ($LockCrash) {
    &RequestLock() or die(T('Could not get editing lock'));
  } else {
    if (!&RequestLock()) {
      &ForceReleaseLock('main');
    }
    # Clear all other locks.
    &ForceReleaseLock('cache');
    &ForceReleaseLock('diff');
    &ForceReleaseLock('index');
  }
  &OpenPage($id);
  &OpenDefaultText();
  $old = $Text{'text'};
  $oldrev = $Section{'revision'};
  $pgtime = $Section{'ts'};
  $preview = 0;
  $preview = 1  if (&GetParam("Preview", "") ne "");
  if (!$preview && ($old eq $string)) {  # No changes (ok for preview)
    &ReleaseLock();
    &ReBrowsePage($id, "", 1);
    return;
  }
  if (($UserID > 399) || ($Section{'id'} > 399))  {
    $newAuthor = ($UserID ne $Section{'id'});       # known user(s)
  } else {
    $newAuthor = ($Section{'ip'} ne $authorAddr);  # hostname fallback
  }
  $newAuthor = 1  if ($oldrev == 0);  # New page
  $newAuthor = 0  if (!$newAuthor);   # Standard flag form, not empty
  # Detect editing conflicts and resubmit edit
  if (($oldrev > 0) && ($newAuthor && ($oldtime != $pgtime))) {
    &ReleaseLock();
    if ($oldconflict > 0) {  # Conflict again...
      &DoEdit($id, 2, $pgtime, $string, $preview);
    } else {
      &DoEdit($id, 1, $pgtime, $string, $preview);
    }
    return;
  }
  if ($preview) {
    &ReleaseLock();
    &DoEdit($id, 0, $pgtime, $string, 1);
    return;
  }
  $user = &GetParam("username", "");
  # If the person doing editing chooses, send out email notification
  if ($EmailNotify) {
    &EmailNotify($id, $user) if &GetParam("do_email_notify", "") eq 'on';
  }
  if (&GetParam("recent_edit", "") eq 'on') {
    $isEdit = 1;
  }
  if (!$isEdit) {
    &SetPageCache('oldmajor', $Section{'revision'});
  }
  if ($newAuthor) {
    &SetPageCache('oldauthor', $Section{'revision'});
  }
  &SaveKeepSection();
  &ExpireKeepFile();
  if ($UseDiff) {
    &UpdateDiffs($id, $editTime, $old, $string, $isEdit, $newAuthor);
  }
  $Text{'text'} = $string;
  $Text{'minor'} = $isEdit;
  $Text{'newauthor'} = $newAuthor;
  $Text{'summary'} = $summary;
  $Section{'host'} = &GetRemoteHost(1);
  &SaveDefaultText(); 
  &SavePage();
  &WriteRcLog($id, $summary, $isEdit, $editTime, $Section{'revision'},
              $user, $Section{'host'});
  if ($UseCache) {
    &UnlinkHtmlCache($id);         # Old cached copy is invalid
    if ($Page{'revision'} < 2) {   # If this is a new page...
      &NewPageCacheClear($id);     # ...uncache pages linked to this one.
    }
  }
  if ($UseIndex && ($Page{'revision'} == 1)) {
    unlink($IndexFile);  # Regenerate index on next request
  }
  &ReleaseLock();
  &ReBrowsePage($id, "", 1);
}

sub UpdateDiffs {
  my ($id, $editTime, $old, $new, $isEdit, $newAuthor) = @_;
  my ($editDiff, $oldMajor, $oldAuthor);

  $editDiff  = &GetDiff($old, $new, 0);     # 0 = already in lock
  $oldMajor  = &GetPageCache('oldmajor');
  $oldAuthor = &GetPageCache('oldauthor');
  if ($UseDiffLog) {
    &WriteDiff($id, $editTime, $editDiff);
  }
  &SetPageCache('diff_default_minor', $editDiff);
  if ($isEdit || !$newAuthor) {
    &OpenKeptRevisions('text_default');
  }
  if (!$isEdit) {
    &SetPageCache('diff_default_major', "1");
  } else {
    &SetPageCache('diff_default_major', &GetKeptDiff($new, $oldMajor, 0));
  }
  if ($newAuthor) {
    &SetPageCache('diff_default_author', "1");
  } elsif ($oldMajor == $oldAuthor) {
    &SetPageCache('diff_default_author', "2");
  } else {
    &SetPageCache('diff_default_author', &GetKeptDiff($new, $oldAuthor, 0));
  }
}

# Translation note: the email messages are still sent in English
# Send an email message.
sub SendEmail {
  my ($to, $from, $reply, $subject, $message) = @_;

  # sendmail options:
  #    -odq : send mail to queue (i.e. later when convenient)
  #    -oi  : do not wait for "." line to exit
  #    -t   : headers determine recipient.
  open (SENDMAIL, "| $SendMail -oi -t ") or die "Can't send email: $!\n";
  print SENDMAIL <<"EOF";
From: $from
To: $to
Reply-to: $reply
Subject: $subject\n
$message
EOF
  close(SENDMAIL) or warn "sendmail didn't close nicely";
}

## Email folks who want to know a note that a page has been modified. - JimM.
sub EmailNotify {
  local $/ = "\n";   # don't slurp whole files in this sub.

  if ($EmailNotify) {
    my ($id, $user) = @_;
    if ($user) {
      $user = " by $user";
    }
    my $address;
    return  if (!-f $EmailFile);  # No notifications yet
    open(EMAIL, $EmailFile)
      or die "Can't open $EmailFile: $!\n";
    $address = join ",", ;
    $address =~ s/\n//g;
    close(EMAIL);
    my $home_url = $q->url();
    my $page_url = $home_url . "?$id";
    my $editors_summary = $q->param("summary");
    if (($editors_summary eq "*") or ($editors_summary eq "")){
      $editors_summary = "";
    }
    else {
      $editors_summary = "\n Summary: $editors_summary";
    }
    my $content = <<"END_MAIL_CONTENT";

 The $SiteName page $id at
   $page_url
 has been changed$user to revision $Page{revision}. $editors_summary

 (Replying to this notification will
  send email to the entire mailing list,
  so only do that if you mean to.

  To remove yourself from this list, visit
  ${home_url}?action=editprefs .)
END_MAIL_CONTENT
    my $subject = "The $id page at $SiteName has been changed.";
    # I'm setting the "reply-to" field to be the same as the "to:" field
    # which seems appropriate for a mailing list, especially since the
    # $EmailFrom string needn't be a real email address.
    &SendEmail($address, $EmailFrom, $address, $subject, $content);
  }
}

sub SearchTitleAndBody {
  my ($string) = @_;
  my ($name, $freeName, @found);

  foreach $name (&AllPagesList()) {
    &OpenPage($name);
    &OpenDefaultText();
    if (($Text{'text'} =~ /$string/i) || ($name =~ /$string/i)) {
      push(@found, $name);
    } elsif ($FreeLinks && ($name =~ m/_/)) {
      $freeName = $name;
      $freeName =~ s/_/ /g;
      if ($freeName =~ /$string/i) {
        push(@found, $name);
      }
    }
  }
  return @found;
}

sub SearchBody {
  my ($string) = @_;
  my ($name, @found);

  foreach $name (&AllPagesList()) {
    &OpenPage($name);
    &OpenDefaultText();
    if ($Text{'text'} =~ /$string/i){
      push(@found, $name);
    }
  }
  return @found;
}

sub UnlinkHtmlCache {
  my ($id) = @_;
  my $idFile;

  $idFile = &GetHtmlCacheFile($id);
  if (-f $idFile) {
    unlink($idFile);
  }
}

sub NewPageCacheClear {
  my ($id) = @_;
  my $name;

  return if (!$UseCache);
  $id =~ s|.+/|/|;  # If subpage, search for just the subpage
  # The following code used to search the body for the $id
  foreach $name (&AllPagesList()) {  # Remove all to be safe
    &UnlinkHtmlCache($name);
  }
}

# Note: all diff and recent-list operations should be done within locks.
sub DoUnlock {
  my $LockMessage = T('Normal Unlock.');

  print &GetHeader('', T('Removing edit lock'), '');
  print '
    ', T('This operation may take several seconds...'), "\n";
  if (&ForceReleaseLock('main')) {
    $LockMessage = T('Forced Unlock.');
  }
  &ForceReleaseLock('cache');
  &ForceReleaseLock('diff');
  &ForceReleaseLock('index');
  print "
    $LockMessage
    ";
  print &GetCommonFooter();
}

# Note: all diff and recent-list operations should be done within locks.
sub WriteRcLog {
  my ($id, $summary, $isEdit, $editTime, $revision, $name, $rhost) = @_;
  my ($extraTemp, %extra);

  %extra = ();
  $extra{'id'} = $UserID          if ($UserID > 0);
  $extra{'name'} = $name          if ($name ne "");
  $extra{'revision'} = $revision  if ($revision ne "");
  $extraTemp = join($FS2, %extra);
  # The two fields at the end of a line are kind and extension-hash
  my $rc_line = join($FS3, $editTime, $id, $summary,
                     $isEdit, $rhost, "0", $extraTemp);
  if (!open(OUT, ">>$RcFile")) {
    die(Ts('%s log error:', $RCName) . " $!");
  }
  print OUT  $rc_line . "\n";
  close(OUT);
}

sub WriteDiff {
  my ($id, $editTime, $diffString) = @_;

  open (OUT, ">>$DataDir/diff_log") or die(T('can not write diff_log'));
  print OUT  "------\n" . $id . "|" . $editTime . "\n";
  print OUT  $diffString;
  close(OUT);
}

# Actions are vetoable if someone edits the page before
# the keep expiry time. For example, page deletion. If
# no one edits the page by the time the keep expiry time
# elapses, then no one has vetoed the last action, and the
# action is accepted.
# See http://www.usemod.com/cgi-bin/mb.pl?PageDeletion
sub ProcessVetos {
  my ($expirets);

  $expirets = $Now - ($KeepDays * 24 * 60 * 60);
  return (0, T('(done)'))  unless $Page{'ts'} < $expirets;
  if ($DeletedPage && $Text{'text'} =~ /^\s*$DeletedPage\W*?(\n|$)/o) {
    &DeletePage($OpenPageName, 1, 1);
    return (1, T('(deleted)'));
  }
  if ($ReplaceFile && $Text{'text'} =~ /^\s*$ReplaceFile\:\s*(\S+)/o) {
    my $fname = $1;
    # Only replace an allowed, existing file.
    if ((grep {$_ eq $fname} @ReplaceableFiles) && -e $fname) {
       if ($Text{'text'} =~ /.*
    .*?\n(.*?)\s*<\/pre>/ims)
       {
         my $string = $1;
         $string =~ s/\r\n/\n/gms;
         open (OUT, ">$fname") or return 0;
         print OUT $string;
         close OUT;
         return (0, T('(replaced)'));
      }
    }
  }
  return (0, T('(done)'));
}

sub DoMaintain {
  my ($name, $fname, $data, $message, $status);
  print &GetHeader('', T('Maintenance on all pages'), '');
  print "
    ";
  $fname = "$DataDir/maintain";
  if (!&UserIsAdmin()) {
    if ((-f $fname) && ((-M $fname) < 0.5)) {
      print T('Maintenance not done.'), ' ';
      print T('(Maintenance can only be done once every 12 hours.)');
      print ' ', T('Remove the "maintain" file or wait.');
      print &GetCommonFooter();
      return;
    }
  }
  &RequestLock() or die(T('Could not get maintain-lock'));
  foreach $name (&AllPagesList()) {
    &OpenPage($name);
    &OpenDefaultText();
    ($status, $message) = &ProcessVetos();
    &ExpireKeepFile() unless $status;
    print ".... "  if ($name =~ m|/|);
    print &GetPageLink($name);
    print " $message
    \n";
  }
  &WriteStringToFile($fname, Ts('Maintenance done at %s', &TimeToText($Now)));
  &ReleaseLock();
  # Do any rename/deletion commands
  # (Must be outside lock because it will grab its own lock)
  $fname = "$DataDir/editlinks";
  if (-f $fname) {
    $data = &ReadFileOrDie($fname);
    print '
    ', T('Processing rename/delete commands:'), "
    \n";
    &UpdateLinksList($data, 1, 1);  # Always update RC and links
    unlink("$fname.old");
    rename($fname, "$fname.old");
  }
  if ($MaintTrimRc) {
    &RequestLock() or die(T('Could not get lock for RC maintenance'));
    $status = &TrimRc();  # Consider error messages?
    &ReleaseLock();
  }
  print &GetCommonFooter();
}

# Must be called within a lock.
# Thanks to Alex Schroeder for original code
sub TrimRc {
  my (@rc, @temp, $starttime, $days, $status, $data, $i, $ts);

  # Determine the number of days to go back
  $days = 0;
  foreach (@RcDays) {
    $days = $_  if $_ > $days;
  }
  $starttime = $Now - $days * 24 * 60 * 60;
  return 1  if (!-f $RcFile);  # No work if no file exists
  ($status, $data) = &ReadFile($RcFile);
  if (!$status) {
    print '
    ' . Ts('Could not open %s log file', $RCName)
          . ": $RcFile
    "
          . T('Error was') . ":\n
    $!\n" . '
    ';
    return 0;
  }
  # Move the old stuff from rc to temp
  @rc = split(/\n/, $data);
  for ($i = 0; $i < @rc; $i++) {
    ($ts) = split(/$FS3/, $rc[$i]);
    last  if ($ts >= $starttime);
  }
  return 1  if ($i < 1);  # No lines to move from new to old
  @temp = splice(@rc, 0, $i);
  # Write new files and backups
  if (!open(OUT, ">>$RcOldFile")) {
    print '
    ' . Ts('Could not open %s log file', $RCName)
          . ": $RcOldFile
    "
          . T('Error was') . ":\n
    $!\n" . '
    ';
    return 0;
  }
  print OUT  join("\n", @temp) . "\n";
  close(OUT);
  &WriteStringToFile($RcFile . '.old', $data);
  $data = join("\n", @rc);
  $data .= "\n"  if ($data ne '');  # If no entries, don't add blank line
  &WriteStringToFile($RcFile, $data);
  return 1;
}

sub DoMaintainRc {
  print &GetHeader('', T('Maintaining RC log'), '');
  return  if (!&UserIsAdminOrError());
  &RequestLock() or die(T('Could not get lock for RC maintenance'));
  if (&TrimRc()) {
    print '
    ' . T('RC maintenance done.') . '
    ';
  } else {
    print '
    ' . T('RC maintenance not done.') . '
    ';
  }
  &ReleaseLock();
  print &GetCommonFooter();
}

sub UserIsEditorOrError {
  if (!&UserIsEditor()) {
    print '
    ', T('This operation is restricted to site editors only...');
    print &GetCommonFooter();
    return 0;
  }
  return 1;
}

sub UserIsAdminOrError {
  if (!&UserIsAdmin()) {
    print '
    ', T('This operation is restricted to administrators only...');
    print &GetCommonFooter();
    return 0;
  }
  return 1;
}

sub DoEditLock {
  my ($fname);

  print &GetHeader('', T('Set or Remove global edit lock'), '');
  return  if (!&UserIsAdminOrError());
  $fname = "$DataDir/noedit";
  if (&GetParam("set", 1)) {
    &WriteStringToFile($fname, "editing locked.");
  } else {
    unlink($fname);
  }
  if (-f $fname) {
    print '
    ', T('Edit lock created.'), '
    ';
  } else {
    print '
    ', T('Edit lock removed.'), '
    ';
  }
  print &GetCommonFooter();
}

sub DoPageLock {
  my ($fname, $id);

  print &GetHeader('', T('Set or Remove page edit lock'), '');
  # Consider allowing page lock/unlock at editor level?
  return  if (!&UserIsAdminOrError());
  $id = &GetParam("id", "");
  if ($id eq "") {
    print '
    ', T('Missing page id to lock/unlock...');
    return;
  }
  return  if (!&ValidIdOrDie($id));       # Consider nicer error?
  $fname = &GetLockedPageFile($id);
  if (&GetParam("set", 1)) {
    &WriteStringToFile($fname, "editing locked.");
  } else {
    unlink($fname);
  }
  if (-f $fname) {
    print '
    ', Ts('Lock for %s created.', $id), '
    ';
  } else {
    print '
    ', Ts('Lock for %s removed.', $id), '
    ';
  }
  print &GetCommonFooter();
}

sub DoEditBanned {
  my ($banList, $status);

  print &GetHeader("", "Editing Banned list", "");
  return  if (!&UserIsAdminOrError());
  ($status, $banList) = &ReadFile("$DataDir/banlist");
  $banList = ""  if (!$status);
  print &GetFormStart();
  print GetHiddenValue("edit_ban", 1), "\n";
  print "Banned IP/network/host list:
    \n";
  print "
    Each entry is either a commented line (starting with #), ",
        "or a Perl regular expression (matching either an IP address or ",
        "a hostname).  Note: To test the ban on yourself, you must ",
        "give up your admin access (remove password in Preferences).";
  print "
    Example:
    ",
        "# blocks hosts ending with .foocorp.com
    ",
        "\\.foocorp\\.com\$
    ",
        "# blocks exact IP address
    ",
        "^123\\.21\\.3\\.9\$
    ",
        "# blocks whole 123.21.3.* IP network
    ",
        "^123\\.21\\.3\\.\\d+\$
    ";
  print &GetTextArea('banlist', $banList, 12, 50);
  print "
    ", $q->submit(-name=>'Save'), "\n";
  print "
    \n";
  print &GetGotoBar("");
  print $q->endform;
  print &GetMinimumFooter();
}

sub DoUpdateBanned {
  my ($newList, $fname);

  print &GetHeader("", "Updating Banned list", "");
  return  if (!&UserIsAdminOrError());
  $fname = "$DataDir/banlist";
  $newList = &GetParam("banlist", "#Empty file");
  if ($newList eq "") {
    print "
    Empty banned list or error.";
    print "
    Resubmit with at least one space character to remove.";
  } elsif ($newList =~ /^\s*$/s) {
    unlink($fname);
    print "
    Removed banned list";
  } else {
    &WriteStringToFile($fname, $newList);
    print "
    Updated banned list";
  }
  print &GetCommonFooter();
}

# ==== Editing/Deleting pages and links ====
sub DoEditLinks {
  print &GetHeader("", "Editing Links", "");
  if ($AdminDelete) {
    return  if (!&UserIsAdminOrError());
  } else {
    return  if (!&UserIsEditorOrError());
  }
  print &GetFormStart();
  print GetHiddenValue("edit_links", 1), "\n";
  print "Editing/Deleting page titles:
    \n";
  print "
    Enter one command on each line.  Commands are:
    ",
        "!PageName -- deletes the page called PageName
    \n",
        "=OldPageName=NewPageName -- Renames OldPageName ",
        "to NewPageName and updates links to OldPageName.
    \n",
        "|OldPageName|NewPageName -- Changes links to OldPageName ",
        "to NewPageName.",
        " (Used to rename links to non-existing pages.)
    \n",
        "Note: page names are case-sensitive!\n";
  print &GetTextArea('commandlist', "", 12, 50);
  print $q->checkbox(-name=>"p_changerc", -override=>1, -checked=>1,
                      -label=>"Edit $RCName");
  print "
    \n";
  print $q->checkbox(-name=>"p_changetext", -override=>1, -checked=>1,
                      -label=>"Substitute text for rename");
  print "
    ", $q->submit(-name=>'Edit'), "\n";
  print "
    \n";
  print &GetGotoBar("");
  print $q->endform;
  print &GetMinimumFooter();
}

sub UpdateLinksList {
  my ($commandList, $doRC, $doText) = @_;

  if ($doText) {
    &BuildLinkIndex();
  }
  &RequestLock() or die T('UpdateLinksList could not get main lock');
  unlink($IndexFile)  if ($UseIndex);
  foreach (split(/\n/, $commandList)) {
    s/\s+$//g;
    next  if (!(/^[=!|]/));  # Only valid commands.
    print "Processing $_
    \n";
    if (/^\!(.+)/) {
      &DeletePage($1, $doRC, $doText);
    } elsif (/^\=(?:\[\[)?([^]=]+)(?:\]\])?\=(?:\[\[)?([^]=]+)(?:\]\])?/) {
      &RenamePage($1, $2, $doRC, $doText);
    } elsif (/^\|(?:\[\[)?([^]|]+)(?:\]\])?\|(?:\[\[)?([^]|]+)(?:\]\])?/) {
      &RenameTextLinks($1, $2);
    }
  }
  &NewPageCacheClear(".");  # Clear cache (needs testing?)
  unlink($IndexFile)  if ($UseIndex);
  &ReleaseLock();
}

sub BuildLinkIndex {
  my (@pglist, $page, @links, $link, %seen);

  @pglist = &AllPagesList();
  %LinkIndex = ();
  foreach $page (@pglist) {
    &BuildLinkIndexPage($page);
  }
}

sub BuildLinkIndexPage {
  my ($page) = @_;
  my (@links, $link, %seen);

  @links = &GetPageLinks($page, 1, 0, 0);
  %seen = ();
  foreach $link (@links) {
    if (defined($LinkIndex{$link})) {
      if (!$seen{$link}) {
        $LinkIndex{$link} .= " " . $page;
      }
    } else {
      $LinkIndex{$link} .= " " . $page;
    }
    $seen{$link} = 1;
  }
}

sub DoUpdateLinks {
  my ($commandList, $doRC, $doText);

  print &GetHeader("", T('Updating Links'), "");
  if ($AdminDelete) {
    return  if (!&UserIsAdminOrError());
  } else {
    return  if (!&UserIsEditorOrError());
  }
  $commandList = &GetParam("commandlist", "");
  $doRC   = &GetParam("p_changerc", "0");
  $doRC   = 1  if ($doRC eq "on");
  $doText = &GetParam("p_changetext", "0");
  $doText = 1  if ($doText eq "on");
  if ($commandList eq "") {
    print "
    Empty command list or error.";
  } else {
    &UpdateLinksList($commandList, $doRC, $doText);
    print "
    Finished command list.";
  }
  print &GetCommonFooter();
}

sub EditRecentChanges {
  my ($action, $old, $new) = @_;

  &EditRecentChangesFile($RcFile,    $action, $old, $new, 1);
  &EditRecentChangesFile($RcOldFile, $action, $old, $new, 0);
}

sub EditRecentChangesFile {
  my ($fname, $action, $old, $new, $printError) = @_;
  my ($status, $fileData, $errorText, $rcline, @rclist);
  my ($outrc, $ts, $page, $junk);

  ($status, $fileData) = &ReadFile($fname);
  if (!$status) {
    # Save error text if needed.
    $errorText = "
    Could not open $RCName log file:"
                 . " $fname
    Error was:\n
    $!
    \n";
    print $errorText  if ($printError);
    return;
  }
  $outrc = "";
  @rclist = split(/\n/, $fileData);
  foreach $rcline (@rclist) {
    ($ts, $page, $junk) = split(/$FS3/, $rcline);
    if ($page eq $old) {
      if ($action == 1) {  # Delete
        ; # Do nothing (don't add line to new RC)
      } elsif ($action == 2) {
        $junk = $rcline;
        $junk =~ s/^(\d+$FS3)$old($FS3)/"$1$new$2"/ge;
        $outrc .= $junk . "\n";
      }
    } else {
      $outrc .= $rcline . "\n";
    }
  }
  &WriteStringToFile($fname . ".old", $fileData);  # Backup copy
  &WriteStringToFile($fname, $outrc);
}

# Delete and rename must be done inside locks.
sub DeletePage {
  my ($page, $doRC, $doText) = @_;
  my ($fname, $status);

  $page =~ s/ /_/g;
  $page =~ s/\[+//;
  $page =~ s/\]+//;
  $status = &ValidId($page);
  if ($status ne "") {
    print "Delete-Page: page $page is invalid, error is: $status
    \n";
    return;
  }
  $fname = &GetPageFile($page);
  unlink($fname)  if (-f $fname);
  $fname = $KeepDir . "/" . &GetPageDirectory($page) .  "/$page.kp";
  unlink($fname)  if (-f $fname);
  unlink($IndexFile)  if ($UseIndex);
  &EditRecentChanges(1, $page, "")  if ($doRC);  # Delete page
  # Currently don't do anything with page text
}

# Given text, returns substituted text
sub SubstituteTextLinks {
  my ($old, $new, $text) = @_;

  # Much of this is taken from the common markup
  %SaveUrl = ();
  $SaveUrlIndex = 0;
  $text =~ s/$FS(\d)/$1/g;              # Remove separators (paranoia)
  if ($RawHtml) {
    $text =~ s/(((.|\n)*?)<\/html>)/&StoreRaw($1)/ige;
  }
  $text =~ s/(
    ((.|\n)*?)<\/pre>)/&StoreRaw($1)/ige;
  $text =~ s/(((.|\n)*?)<\/code>)/&StoreRaw($1)/ige;
  $text =~ s/(((.|\n)*?)<\/nowiki>)/&StoreRaw($1)/ige;
  if ($FreeLinks) {
    $text =~
     s/\[\[$FreeLinkPattern\|([^\]]+)\]\]/&SubFreeLink($1,$2,$old,$new)/geo;
    $text =~ s/\[\[$FreeLinkPattern\]\]/&SubFreeLink($1,"",$old,$new)/geo;
  }
  if ($BracketText) {  # Links like [URL text of link]
    $text =~ s/(\[$UrlPattern\s+([^\]]+?)\])/&StoreRaw($1)/geo;
    $text =~ s/(\[$InterLinkPattern\s+([^\]]+?)\])/&StoreRaw($1)/geo;
  }
  $text =~ s/(\[?$UrlPattern\]?)/&StoreRaw($1)/geo;
  $text =~ s/(\[?$InterLinkPattern\]?)/&StoreRaw($1)/geo;
  if ($WikiLinks) {
    $text =~ s/$LinkPattern/&SubWikiLink($1, $old, $new)/geo;
  }
  # Thanks to David Claughton for the following fix
  1 while $text =~ s/$FS(\d+)$FS/$SaveUrl{$1}/ge;   # Restore saved text
  return $text;
}

sub SubFreeLink {
  my ($link, $name, $old, $new) = @_;
  my ($oldlink);

  $oldlink = $link;
  $link =~ s/^\s+//;
  $link =~ s/\s+$//;
  if (($link eq $old) || (&FreeToNormal($old) eq &FreeToNormal($link))) {
    $link = $new;
  } else {
    $link = $oldlink;  # Preserve spaces if no match
  }
  $link = "[[$link";
  if ($name ne "") {
    $link .= "|$name";
  }
  $link .= "]]";
  return &StoreRaw($link);
}

sub SubWikiLink {
  my ($link, $old, $new) = @_;
  my ($newBracket);

  $newBracket = 0;
  if ($link eq $old) {
    $link = $new;
    if (!($new =~ /^$LinkPattern$/)) {
      $link = "[[$link]]";
    }
  }
  return &StoreRaw($link);
}

# Rename is mostly copied from expire
sub RenameKeepText {
  my ($page, $old, $new) = @_;
  my ($fname, $status, $data, @kplist, %tempSection, $changed);
  my ($sectName, $newText);

  $fname = $KeepDir . "/" . &GetPageDirectory($page) .  "/$page.kp";
  return  if (!(-f $fname));
  ($status, $data) = &ReadFile($fname);
  return  if (!$status);
  @kplist = split(/$FS1/, $data, -1);  # -1 keeps trailing null fields
  return  if (length(@kplist) < 1);  # Also empty
  shift(@kplist)  if ($kplist[0] eq "");  # First can be empty
  return  if (length(@kplist) < 1);  # Also empty
  %tempSection = split(/$FS2/, $kplist[0], -1);
  if (!defined($tempSection{'keepts'})) {
    return;
  }
  # First pass: optimize for nothing changed
  $changed = 0;
  foreach (@kplist) {
    %tempSection = split(/$FS2/, $_, -1);
    $sectName = $tempSection{'name'};
    if ($sectName =~ /^(text_)/) {
      %Text = split(/$FS3/, $tempSection{'data'}, -1);
      $newText = &SubstituteTextLinks($old, $new, $Text{'text'});
      $changed = 1  if ($Text{'text'} ne $newText);
    }
  }
  return  if (!$changed);  # No sections changed
  open (OUT, ">$fname") or return;
  foreach (@kplist) {
    %tempSection = split(/$FS2/, $_, -1);
    $sectName = $tempSection{'name'};
    if ($sectName =~ /^(text_)/) {
      %Text = split(/$FS3/, $tempSection{'data'}, -1);
      $newText = &SubstituteTextLinks($old, $new, $Text{'text'});
      $Text{'text'} = $newText;
      $tempSection{'data'} = join($FS3, %Text);
      print OUT $FS1, join($FS2, %tempSection);
    } else {
      print OUT $FS1, $_;
    }
  }
  close(OUT);
}

sub RenameTextLinks {
  my ($old, $new) = @_;
  my ($changed, $file, $page, $section, $oldText, $newText, $status);
  my ($oldCanonical, @pageList);

  $old =~ s/ /_/g;
  $oldCanonical = &FreeToNormal($old);
  $new =~ s/ /_/g;
  $status = &ValidId($old);
  if ($status ne "") {
    print "Rename-Text: old page $old is invalid, error is: $status
    \n";
    return;
  }
  $status = &ValidId($new);
  if ($status ne "") {
    print "Rename-Text: new page $new is invalid, error is: $status
    \n";
    return;
  }
  $old =~ s/_/ /g;
  $new =~ s/_/ /g;
  # Note: the LinkIndex must be built prior to this routine
  return  if (!defined($LinkIndex{$oldCanonical}));
  @pageList = split(' ', $LinkIndex{$oldCanonical});
  foreach $page (@pageList) {
    $changed = 0;
    &OpenPage($page);
    foreach $section (keys %Page) {
      if ($section =~ /^text_/) {
        &OpenSection($section);
        %Text = split(/$FS3/, $Section{'data'}, -1);
        $oldText = $Text{'text'};
        $newText = &SubstituteTextLinks($old, $new, $oldText);
        if ($oldText ne $newText) {
          $Text{'text'} = $newText;
          $Section{'data'} = join($FS3, %Text);
          $Page{$section} = join($FS2, %Section);
          $changed = 1;
        }
      } elsif ($section =~ /^cache_diff/) {
        $oldText = $Page{$section};
        $newText = &SubstituteTextLinks($old, $new, $oldText);
        if ($oldText ne $newText) {
          $Page{$section} = $newText;
          $changed = 1;
        }
      }
      # Add other text-sections (categories) here
    }
    if ($changed) {
      $file = &GetPageFile($page);
      &WriteStringToFile($file, join($FS1, %Page));
    }
    &RenameKeepText($page, $old, $new);
  }
}

sub RenamePage {
  my ($old, $new, $doRC, $doText) = @_;
  my ($oldfname, $newfname, $oldkeep, $newkeep, $status);

  $old =~ s/ /_/g;
  $new = &FreeToNormal($new);
  $status = &ValidId($old);
  if ($status ne "") {
    print "Rename: old page $old is invalid, error is: $status
    \n";
    return;
  }
  $status = &ValidId($new);
  if ($status ne "") {
    print "Rename: new page $new is invalid, error is: $status
    \n";
    return;
  }
  $newfname = &GetPageFile($new);
  if (-f $newfname) {
    print "Rename: new page $new already exists--not renamed.
    \n";
    return;
  }
  $oldfname = &GetPageFile($old);
  if (!(-f $oldfname)) {
    print "Rename: old page $old does not exist--nothing done.
    \n";
    return;
  }
  &CreatePageDir($PageDir, $new);  # It might not exist yet
  rename($oldfname, $newfname);
  &CreatePageDir($KeepDir, $new);
  $oldkeep = $KeepDir . "/" . &GetPageDirectory($old) .  "/$old.kp";
  $newkeep = $KeepDir . "/" . &GetPageDirectory($new) .  "/$new.kp";
  unlink($newkeep)  if (-f $newkeep);  # Clean up if needed.
  rename($oldkeep,  $newkeep);
  unlink($IndexFile)  if ($UseIndex);
  &EditRecentChanges(2, $old, $new)  if ($doRC);
  if ($doText) {
    &BuildLinkIndexPage($new);  # Keep index up-to-date
    &RenameTextLinks($old, $new);
  }
}

sub DoShowVersion {
  print &GetHeader("", "Displaying Wiki Version", "");
  print "
    UseModWiki version 1.0
    \n";
  print &GetCommonFooter();
}

# Admin bar contributed by ElMoro (with some changes)
sub GetPageLockLink {
  my ($id, $status, $name) = @_;

  if ($FreeLinks) {
    $id = &FreeToNormal($id);
  }
  return &ScriptLink("action=pagelock&set=$status&id=$id", $name);
}

sub GetAdminBar {
  my ($id) = @_;
  my ($result);

  $result = T('Administration') . ': ';
  if (-f &GetLockedPageFile($id))   { 
    $result .= &GetPageLockLink($id, 0, T('Unlock page'));
  }
  else  {
    $result .= &GetPageLockLink($id, 1, T('Lock page'));
  }
  $result .= " | " . &GetDeleteLink($id, T('Delete this page'), 0);
  $result .= " | " . &ScriptLink("action=editbanned", T("Edit Banned List"));
  $result .= " | " . &ScriptLink("action=maintain", T("Run Maintenance"));
  $result .= " | " . &ScriptLink("action=editlinks", T("Edit/Rename pages")); 
  if (-f "$DataDir/noedit") {
    $result .= " | " . &ScriptLink("action=editlock&set=0", T("Unlock site")); 
  } else {
    $result .= " | " . &ScriptLink("action=editlock&set=1", T("Lock site"));
  }
  return $result;
}

# Thanks to Phillip Riley for original code
sub DoDeletePage {
  my ($id) = @_;

  return  if (!&ValidIdOrDie($id));
  return  if (!&UserIsAdminOrError());
  if ($ConfirmDel && !&GetParam('confirm', 0)) {
    print &GetHeader('', Ts('Confirm Delete %s', $id), '');
    print '
    ';
    print Ts('Confirm deletion of %s by following this link:', $id);
    print '
    ' . &GetDeleteLink($id, T('Confirm Delete'), 1);
    print '
    ';
    print &GetCommonFooter();
    return;
  }
  print &GetHeader('', Ts('Delete %s', $id), '');
  print '
    ';
  if ($id eq $HomePage)  {
    print Ts('%s can not be deleted.', $HomePage);
  } else {
    if (-f &GetLockedPageFile($id))   {
      print Ts('%s can not be deleted because it is locked.', $id);
    } else {
      # Must lock because of RC-editing
      &RequestLock() or die(T('Could not get editing lock'));
      DeletePage($id, 1, 1);
      &ReleaseLock();
      print Ts('%s has been deleted.', $id);
    }
  }
  print '
    ';
  print &GetCommonFooter();
}

# Thanks to Ross Kowalski and Iliyan Jeliazkov for original uploading code
sub DoUpload {
  print &GetHeader('', T('File Upload Page'), '');
  if (!$AllUpload) {
    return if (!&UserIsEditorOrError());
  }
  print '
    ' . Ts('The current upload size limit is %s.', $MaxPost) . ' '
        . Ts('Change the %s variable to increase this limit.', '$MaxPost');
  print '

    ';
  print '
    ';
  print '';
  print 'File to Upload: 

    ';
  print '';
  print '
    ';
  print &GetCommonFooter(); 
}

sub SaveUpload {
  my ($filename, $printFilename, $uploadFilehandle);
 
  print &GetHeader('', T('Upload Finished'), '');
  if (!$AllUpload) {
    return  if (!&UserIsEditorOrError());
  }
  $UploadDir .= '/'  if (substr($UploadDir, -1, 1) ne '/');  # End with /
  $UploadUrl .= '/'  if (substr($UploadUrl, -1, 1) ne '/');  # End with /
  $filename = $q->param('file');
  $filename =~ s/.*[\/\\](.*)/$1/;  # Only name after last \ or /
  $uploadFilehandle = $q->upload('file');
  open UPLOADFILE, ">$UploadDir$filename";
  while (<$uploadFilehandle>) { print UPLOADFILE; }
  close UPLOADFILE;
  print T('The wiki link to your file is:') . "\n

    ";
  $printFilename = $filename;
  $printFilename =~ s/ /\%20/g;  # Replace spaces with escaped spaces
  print "upload:" . $printFilename . "

    \n";
  if ($filename =~ /${ImageExtensions}$/) {
    print '
    ' . "\n";
  }
  print &GetCommonFooter();
}

sub ConvertFsFile {
  my ($oldFS, $newFS, $fname) = @_;
  my ($oldData, $newData, $status);

  return  if (!-f $fname);  # Convert only existing regular files
  ($status, $oldData) = &ReadFile($fname);
  if (!$status) {
    print '
    ' . Ts('Could not open file %s', $fname)
          . ':' . T('Error was') . ":\n
    $!
    \n" . '
    ';
    return;
  }
  $newData = $oldData;
  $newData =~ s/$oldFS(\d)/$newFS . $1/ge;
  return  if ($oldData eq $newData);  # Do not write if the same
  &WriteStringToFile($fname, $newData);
# print $fname . '
    ';    # progress report
}

# Converts up to 3 dirs deep  (like page/A/Apple/subpage.db)
# Note that top level directory (page/keep/user) contains only dirs
sub ConvertFsDir {
  my ($oldFS, $newFS, $topDir) = @_;
  my (@dirs, @files, @subFiles, $dir, $file, $subFile, $fname, $subFname);

  opendir(DIRLIST, $topDir);
  @dirs = readdir(DIRLIST);
  closedir(DIRLIST);
  @dirs = sort(@dirs);
  foreach $dir (@dirs) {
    next  if (substr($dir, 0, 1) eq '.');   # No ., .., or .dirs
    next  if (!-d "$topDir/$dir");          # Top level directories only
    next  if (-f "$topDir/$dir.cvt");       # Skip if already converted
    opendir(DIRLIST, "$topDir/$dir");
    @files = readdir(DIRLIST);
    closedir(DIRLIST);
    foreach $file (@files) {
      next  if (($file eq '.') || ($file eq '..'));
      $fname = "$topDir/$dir/$file";
      if (-f $fname) {
#       print $fname . '
    ';   # progress
        &ConvertFsFile($oldFS, $newFS, $fname);
      } elsif (-d $fname) {
        opendir(DIRLIST, $fname);
        @subFiles = readdir(DIRLIST);
        closedir(DIRLIST);
        foreach $subFile (@subFiles) {
          next  if (($subFile eq '.') || ($subFile eq '..'));
          $subFname = "$fname/$subFile";
          if (-f $subFname) {
#           print $subFname . '
    ';   # progress
            &ConvertFsFile($oldFS, $newFS, $subFname);
          }
        }
      }
    }
  &WriteStringToFile("$topDir/$dir.cvt", 'converted');
  }
}

sub ConvertFsCleanup {
  my ($topDir) = @_;
  my (@dirs, $dir);

  opendir(DIRLIST, $topDir);
  @dirs = readdir(DIRLIST);
  closedir(DIRLIST);
  foreach $dir (@dirs) {
    next  if (substr($dir, 0, 1) eq '.');   # No ., .., or .dirs
    next  if (!-f "$topDir/$dir");          # Remove only files...
    next  unless ($dir =~ m/\.cvt$/);       # ...that end with .cvt
    unlink "$topDir/$dir";
  }
}

sub DoConvert {
  my $oldFS = "\xb3";
  my $newFS = "\x1e\xff\xfe\x1e";

  print &GetHeader('', T('Convert wiki DB'), '');
  return if (!&UserIsAdminOrError());
  if ($FS ne $newFS) {
    print Ts('You must change the %s option before converting the wiki DB.',
             '$NewFS') . '
    ';
    return;
  }
  &WriteStringToFile("$DataDir/noedit", 'editing locked.');
  print T('Wiki DB locked for conversion.') . '
    ';
  print T('Converting Wiki DB...') . '
    ';
  &ConvertFsFile($oldFS, $newFS, "$DataDir/rclog");
  &ConvertFsFile($oldFS, $newFS, "$DataDir/rclog.old");
  &ConvertFsFile($oldFS, $newFS, "$DataDir/oldrclog");
  &ConvertFsFile($oldFS, $newFS, "$DataDir/oldrclog.old");
  &ConvertFsDir($oldFS, $newFS, $PageDir);
  &ConvertFsDir($oldFS, $newFS, $KeepDir);
  &ConvertFsDir($oldFS, $newFS, $UserDir);
  &ConvertFsCleanup($PageDir);
  &ConvertFsCleanup($KeepDir);
  &ConvertFsCleanup($UserDir);
  print T('Finished converting wiki DB.') . '
    ';
  print Ts('Remove file %s to unlock wiki for editing.', "$DataDir/noedit")
        . '
    ';
  print &GetCommonFooter();
}

# Remove user-id files if no useful preferences set
sub DoTrimUsers {
  my (%Data, $status, $data, $maxID, $id, $removed, $keep);
  my (@dirs, @files, $dir, $file, $item);

  print &GetHeader('', T('Trim wiki users'), '');
  return if (!&UserIsAdminOrError());
  $removed = 0;
  $maxID = 1001;
  opendir(DIRLIST, $UserDir);
  @dirs = readdir(DIRLIST);
  closedir(DIRLIST);
  foreach $dir (@dirs) {
    next  if (substr($dir, 0, 1) eq '.');   # No ., .., or .dirs
    next  if (!-d "$UserDir/$dir");         # Top level directories only
    opendir(DIRLIST, "$UserDir/$dir");
    @files = readdir(DIRLIST);
    closedir(DIRLIST);
    foreach $file (@files) {
      if ($file =~ m/(\d+).db/) {  # Only numeric ID files
        $id = $1;
        $maxID = $id  if ($id > $maxID);
        %Data = ();
        ($status, $data) = &ReadFile("$UserDir/$dir/$file");
        if ($status) {
          %Data = split(/$FS1/, $data, -1);  # -1 keeps trailing null fields
          $keep = 0;
          foreach $item (qw(username password adminpw stylesheet)) {
            $keep = 1  if (defined($Data{$item}) && ($Data{$item} ne ''));
          }
          if (!$keep) {
            unlink "$UserDir/$dir/$file";
#           print "$UserDir/$dir/$file" . '
    ';  # progress
            $removed += 1;
          }
        }
      }
    }
  }
  print Ts('Removed %s files.', $removed) . '
    ';
  print Ts('Recommended $StartUID setting is %s.', $maxID + 100) . '
    ';
  print &GetCommonFooter();
}
#END_OF_OTHER_CODE

&DoWikiRequest()  if ($RunCGI && ($_ ne 'nocgi'));   # Do everything.
1; # In case we are loaded from elsewhere
# == End of UseModWiki script. ===========================================