includes/SpecialUndelete.php

   1 <?php
   2
   3 function wfSpecialUndelete( $par )
   4 {
   5     global $wgRequest;
   6
   7         $form = new UndeleteForm( $wgRequest, $par );
   8         $form->execute();
   9 }
  10
  11 class UndeleteForm {
  12         var $mAction, $mTarget, $mTimestamp, $mRestore, $mTargetObj;
  13
  14         function UndeleteForm( &$request, $par = "" ) {
  15                 $this->mAction = $request->getText( 'action' );
  16                 $this->mTarget = $request->getText( 'target' );
  17                 $this->mTimestamp = $request->getText( 'timestamp' );
  18                 $this->mRestore = $request->getCheck( 'restore' );
  19                 if( $par != "" ) {
  20                         $this->mTarget = $par;
  21                 }
  22                 if ( $this->mTarget !== "" ) {
  23                         $this->mTargetObj = Title::newFromURL( $this->mTarget );
  24                 } else {
  25                         $this->mTargetObj = NULL;
  26                 }
  27         }
  28
  29         function execute() {
  30                 if( !is_null( $this->mTargetObj ) ) {
  31                         $title = $this->mTargetObj->mDbkeyform;
  32                         $namespace = $this->mTargetObj->mNamespace;
  33                         if( $this->mTimestamp !== "" ) {
  34                                 return $this->showRevision( $namespace, $title, $this->mTimestamp );
  35                         }
  36                         if( $this->mRestore and $this->mAction == "submit" ) {
  37                                 return $this->undelete( $namespace, $title );
  38                         }
  39                         return $this->showHistory( $namespace, $title );
  40                 } else {
  41                         return $this->showList();
  42                 }
  43         }
  44
  45         /* private */ function showList() {
  46                 global $wgLang, $wgUser, $wgOut;
  47                 $fname = "UndeleteForm::showList";
  48
  49                 # List undeletable articles
  50                 $sql = "SELECT ar_namespace,ar_title, COUNT(*) AS count FROM archive " .
  51                   "GROUP BY ar_namespace,ar_title ORDER BY ar_namespace,ar_title";
  52                 $res = wfQuery( $sql, DB_READ, $fname );
  53
  54                 $wgOut->setPagetitle( wfMsg( "undeletepage" ) );
  55                 $wgOut->addWikiText( wfMsg( "undeletepagetext" ) );
  56
  57                 $special = $wgLang->getNsText( Namespace::getSpecial() );
  58                 $sk = $wgUser->getSkin();
  59                 $wgOut->addHTML( "<ul>\n" );
  60                 while ($row = wfFetchObject( $res )) {
  61                         $n = ($row->ar_namespace ?
  62                                 ($wgLang->getNsText( $row->ar_namespace ) . ":") : "").
  63                                 $row->ar_title;
  64
  65                         $wgOut->addHTML( "<li>" .
  66                           $sk->makeKnownLink( $wgLang->specialPage( "Undelete" ),
  67                           $n, "target=" . urlencode($n) ) . " " .
  68                           wfMsg( "undeleterevisions", $row->count ) );
  69                 }
  70                 $wgOut->addHTML( "</ul>\n" );
  71
  72                 return 0;
  73         }
  74
  75         /* private */ function showRevision( $namespace, $title, $timestamp ) {
  76                 global $wgLang, $wgUser, $wgOut;
  77                 $fname = "UndeleteForm::showRevision";
  78
  79                 if(!preg_match("/[0-9]{14}/",$timestamp)) return 0;
  80
  81                 $sql = "SELECT ar_text,ar_flags FROM archive ".
  82                   "WHERE ar_namespace={$namespace} AND ar_title='" .
  83                   wfStrencode( $title ) . "' AND ar_timestamp='" . wfStrencode( $timestamp ) ."'";
  84                 $ret = wfQuery( $sql, DB_READ, $fname );
  85                 $row = wfFetchObject( $ret );
  86
  87                 $wgOut->setPagetitle( wfMsg( "undeletepage" ) );
  88                 $wgOut->addWikiText( "(" . wfMsg( "undeleterevision", $wgLang->date($timestamp, true) )
  89                   . ")\n<hr>\n" . Article::getRevisionText( $row, "ar_" ) );
  90
  91                 return 0;
  92         }
  93
  94         /* private */ function showHistory( $namespace, $title ) {
  95                 global $wgLang, $wgUser, $wgOut;
  96
  97                 $sk = $wgUser->getSkin();
  98                 $wgOut->setPagetitle( wfMsg( "undeletepage" ) );
  99
 100                 # Get text of first revision
 101                 $sql = "SELECT ar_text FROM archive WHERE ar_namespace={$namespace} AND ar_title='" .
 102                   wfStrencode( $title ) . "' ORDER BY ar_timestamp DESC LIMIT 1";
 103                 $ret = wfQuery( $sql, DB_READ );
 104
 105                 if( wfNumRows( $ret ) == 0 ) {
 106                         $wgOut->addWikiText( wfMsg( "nohistory" ) );
 107                         return 0;
 108                 }
 109                 $row = wfFetchObject( $ret );
 110                 $wgOut->addWikiText( wfMsg( "undeletehistory" ) . "\n<hr>\n" . $row->ar_text );
 111
 112                 # Get remaining revisions
 113                 $sql = "SELECT ar_minor_edit,ar_timestamp,ar_user,ar_user_text,ar_comment
 114                   FROM archive WHERE ar_namespace={$namespace} AND ar_title='" . wfStrencode( $title ) .
 115                   "' ORDER BY ar_timestamp DESC";
 116                 $ret = wfQuery( $sql, DB_READ );
 117                 # Ditch first row
 118                 $row = wfFetchObject( $ret );
 119
 120                 $titleObj = Title::makeTitle( NS_SPECIAL, "Undelete" );
 121                 $action = $titleObj->escapeLocalURL( "action=submit" );
 122                 $encTarget = htmlspecialchars( $this->mTarget );
 123
 124                 $wgOut->addHTML("<p>
 125         <form id=\"undelete\" method=\"post\" action=\"{$action}\">
 126         <input type=hidden name=\"target\" value=\"{$encTarget}\">
 127         <input type=submit name=\"restore\" value=\"".wfMsg("undeletebtn")."\">
 128         </form>");
 129
 130                 $log = wfGetSQL("cur", "cur_text", "cur_namespace=4 AND cur_title='".
 131                   wfStrencode( wfMsg("dellogpage") ) . "'" );
 132                 if(preg_match("/^(.*".
 133                         preg_quote( ($namespace ? ($wgLang->getNsText($namespace) . ":") : "")
 134                         . str_replace("_", " ", $title), "/" ).".*)$/m", $log, $m)) {
 135                         $wgOut->addWikiText( $m[1] );
 136                 }
 137
 138                 $special = $wgLang->getNsText( Namespace::getSpecial() );
 139                 $wgOut->addHTML("<ul>");
 140                 while( $row = wfFetchObject( $ret ) ) {
 141                         $wgOut->addHTML( "<li>" .
 142                           $sk->makeKnownLink( $wgLang->specialPage( "Undelete" ),
 143                           $wgLang->timeanddate( $row->ar_timestamp, true ),
 144                           "target=" . urlencode($this->mTarget) . "&timestamp={$row->ar_timestamp}" ) . " " .
 145                           ". . " . htmlspecialchars( $row->ar_user_text )  .
 146                           " <i>(" . htmlspecialchars($row->ar_comment) . "</i>)\n");
 147
 148                 }
 149                 $wgOut->addHTML("</ul>");
 150
 151                 return 0;
 152         }
 153
 154         /* private */ function undelete( $namespace, $title )
 155         {
 156                 global $wgUser, $wgOut, $wgLang, $wgDeferredUpdateList;
 157                 global  $wgUseSquid, $wgInternalServer;
 158
 159                 $fname = "doUndeleteArticle";
 160
 161                 if ( "" == $title ) {
 162                         $wgOut->fatalError( wfMsg( "cannotundelete" ) );
 163                         return;
 164                 }
 165                 $t = wfStrencode($title);
 166
 167                 # Move article and history from the "archive" table
 168                 $sql = "SELECT COUNT(*) AS count FROM cur WHERE cur_namespace={$namespace} AND cur_title='{$t}'";
 169                 $res = wfQuery( $sql, DB_READ );
 170                 $row = wfFetchObject( $res );
 171                 $now = wfTimestampNow();
 172
 173                 if( $row->count == 0) {
 174                         # Have to create new article...
 175                         $sql = "SELECT ar_text,ar_timestamp,ar_flags FROM archive WHERE ar_namespace={$namespace} AND ar_title='{$t}' ORDER BY ar_timestamp DESC LIMIT 1";
 176                         $res = wfQuery( $sql, DB_READ, $fname );
 177                         $s = wfFetchObject( $res );
 178                         $max = $s->ar_timestamp;
 179                         $redirect = MagicWord::get( MAG_REDIRECT );
 180                         $redir = $redirect->matchStart( $s->ar_text ) ? 1 : 0;
 181
 182                         $sql = "INSERT INTO cur (cur_namespace,cur_title,cur_text," .
 183                           "cur_comment,cur_user,cur_user_text,cur_timestamp,inverse_timestamp,cur_minor_edit,cur_is_redirect,cur_random,cur_touched)" .
 184                           "SELECT ar_namespace,ar_title,ar_text,ar_comment," .
 185                           "ar_user,ar_user_text,ar_timestamp,99999999999999-ar_timestamp,ar_minor_edit,{$redir},RAND(),'{$now}' FROM archive " .
 186                           "WHERE ar_namespace={$namespace} AND ar_title='{$t}' AND ar_timestamp={$max}";
 187                         wfQuery( $sql, DB_WRITE, $fname );
 188                         $newid = wfInsertId();
 189                         $oldones = "AND ar_timestamp<{$max}";
 190                 } else {
 191                         # If already exists, put history entirely into old table
 192                         $oldones = "";
 193                         $newid = 0;
 194
 195                         # But to make the history list show up right, we need to touch it.
 196                         $sql = "UPDATE cur SET cur_touched='{$now}' WHERE cur_namespace={$namespace} AND cur_title='{$t}'";
 197                         wfQuery( $sql, DB_WRITE, $fname );
 198
 199                         # FIXME: Sometimes restored entries will be _newer_ than the current version.
 200                         # We should merge.
 201                 }
 202
 203                 $sql = "INSERT INTO old (old_namespace,old_title,old_text," .
 204                   "old_comment,old_user,old_user_text,old_timestamp,inverse_timestamp,old_minor_edit," .
 205                   "old_flags) SELECT ar_namespace,ar_title,ar_text,ar_comment," .
 206                   "ar_user,ar_user_text,ar_timestamp,99999999999999-ar_timestamp,ar_minor_edit,ar_flags " .
 207                   "FROM archive WHERE ar_namespace={$namespace} AND ar_title='{$t}' {$oldones}";
 208                 wfQuery( $sql, DB_WRITE, $fname );
 209
 210                 # Finally, clean up the link tables
 211                 if( $newid ) {
 212                         # Create a dummy OutputPage to update the outgoing links
 213                         # This works at the moment due to good luck. It may stop working in the
 214                         # future. Damn globals.
 215                         $dummyOut = new OutputPage();
 216                         $res = wfQuery( "SELECT cur_text FROM cur WHERE cur_id={$newid} " .
 217                           "AND cur_namespace={$namespace}", DB_READ, $fname );
 218                         $row = wfFetchObject( $res );
 219                         $text = $row->cur_text;
 220                         $dummyOut->addWikiText( $text );
 221                         wfFreeResult( $res );
 222
 223                         $u = new LinksUpdate( $newid, $this->mTargetObj->getPrefixedDBkey() );
 224                         array_push( $wgDeferredUpdateList, $u );
 225
 226                         Article::onArticleCreate( $this->mTargetObj );
 227
 228                         #TODO: SearchUpdate, etc.
 229                 }
 230
 231                 # Now that it's safely stored, take it out of the archive
 232                 $sql = "DELETE FROM archive WHERE ar_namespace={$namespace} AND " .
 233                   "ar_title='{$t}'";
 234                 wfQuery( $sql, DB_WRITE, $fname );
 235
 236
 237                 # Touch the log?
 238                 $log = new LogPage( wfMsg( "dellogpage" ), wfMsg( "dellogpagetext" ) );
 239                 $log->addEntry( wfMsg( "undeletedarticle", $this->mTarget ), "" );
 240
 241                 $wgOut->addWikiText( wfMsg( "undeletedtext", $this->mTarget ) );
 242                 return 0;
 243         }
 244 }
 245 ?>