includes/specials/SpecialMergeHistory.php

   1 <?php
   2 /**
   3  * Special page allowing users with the appropriate permissions to
   4  * merge article histories, with some restrictions
   5  *
   6  * @ingroup SpecialPage
   7  */
   8 class SpecialMergeHistory extends SpecialPage {
   9         var $mAction, $mTarget, $mDest, $mTimestamp, $mTargetID, $mDestID, $mComment;
  10         var $mTargetObj, $mDestObj;
  11
  12         public function __construct() {
  13                 parent::__construct( 'MergeHistory', 'mergehistory' );
  14         }
  15
  16         private function loadRequestParams( $request ) {
  17                 global $wgUser;
  18                 $this->mAction = $request->getVal( 'action' );
  19                 $this->mTarget = $request->getVal( 'target' );
  20                 $this->mDest = $request->getVal( 'dest' );
  21                 $this->mSubmitted = $request->getBool( 'submitted' );
  22
  23                 $this->mTargetID = intval( $request->getVal( 'targetID' ) );
  24                 $this->mDestID = intval( $request->getVal( 'destID' ) );
  25                 $this->mTimestamp = $request->getVal( 'mergepoint' );
  26                 if( !preg_match("/[0-9]{14}/",$this->mTimestamp) ) {
  27                         $this->mTimestamp = '';
  28                 }
  29                 $this->mComment = $request->getText( 'wpComment' );
  30
  31                 $this->mMerge = $request->wasPosted() && $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
  32                 // target page
  33                 if( $this->mSubmitted ) {
  34                         $this->mTargetObj = Title::newFromURL( $this->mTarget );
  35                         $this->mDestObj = Title::newFromURL( $this->mDest );
  36                 } else {
  37                         $this->mTargetObj = null;
  38                         $this->mDestObj = null;
  39                 }
  40                 $this->preCacheMessages();
  41         }
  42
  43         /**
  44          * As we use the same small set of messages in various methods and that
  45          * they are called often, we call them once and save them in $this->message
  46          */
  47         function preCacheMessages() {
  48                 // Precache various messages
  49                 if( !isset( $this->message ) ) {
  50                         $this->message['last'] = wfMsgExt( 'last', array( 'escape' ) );
  51                 }
  52         }
  53
  54         function execute( $par ) {
  55                 global $wgOut, $wgRequest, $wgUser;
  56
  57                 if ( wfReadOnly() ) {
  58                         $wgOut->readOnlyPage();
  59                         return;
  60                 }
  61
  62                 if( !$this->userCanExecute( $wgUser ) ) {
  63                         $this->displayRestrictionError();
  64                         return;
  65                 }
  66
  67                 $this->loadRequestParams( $wgRequest );
  68
  69                 $this->setHeaders();
  70                 $this->outputHeader();
  71
  72                 if( $this->mTargetID && $this->mDestID && $this->mAction=="submit" && $this->mMerge ) {
  73                         return $this->merge();
  74                 }
  75
  76                 if ( !$this->mSubmitted ) {
  77                         $this->showMergeForm();
  78                         return;
  79                 }
  80
  81                 $errors = array();
  82                 if ( !$this->mTargetObj instanceof Title ) {
  83                         $errors[] = wfMsgExt( 'mergehistory-invalid-source', array( 'parse' ) );
  84                 } elseif( !$this->mTargetObj->exists() ) {
  85                         $errors[] = wfMsgExt( 'mergehistory-no-source', array( 'parse' ),
  86                                 wfEscapeWikiText( $this->mTargetObj->getPrefixedText() )
  87                         );
  88                 }
  89
  90                 if ( !$this->mDestObj instanceof Title) {
  91                         $errors[] = wfMsgExt( 'mergehistory-invalid-destination', array( 'parse' ) );
  92                 } elseif( !$this->mDestObj->exists() ) {
  93                         $errors[] = wfMsgExt( 'mergehistory-no-destination', array( 'parse' ),
  94                                 wfEscapeWikiText( $this->mDestObj->getPrefixedText() )
  95                         );
  96                 }
  97
  98                 if ( $this->mTargetObj && $this->mDestObj && $this->mTargetObj->equals( $this->mDestObj ) ) {
  99                         $errors[] = wfMsgExt( 'mergehistory-same-destination', array( 'parse' ) );
 100                 }
 101
 102                 if ( count( $errors ) ) {
 103                         $this->showMergeForm();
 104                         $wgOut->addHTML( implode( "\n", $errors ) );
 105                 } else {
 106                         $this->showHistory();
 107                 }
 108
 109         }
 110
 111         function showMergeForm() {
 112                 global $wgOut, $wgScript;
 113
 114                 $wgOut->addWikiMsg( 'mergehistory-header' );
 115
 116                 $wgOut->addHTML(
 117                         Xml::openElement( 'form', array(
 118                                 'method' => 'get',
 119                                 'action' => $wgScript ) ) .
 120                         '<fieldset>' .
 121                         Xml::element( 'legend', array(),
 122                                 wfMsg( 'mergehistory-box' ) ) .
 123                         Xml::hidden( 'title', $this->getTitle()->getPrefixedDbKey() ) .
 124                         Xml::hidden( 'submitted', '1' ) .
 125                         Xml::hidden( 'mergepoint', $this->mTimestamp ) .
 126                         Xml::openElement( 'table' ) .
 127                         "<tr>
 128                                 <td>".Xml::label( wfMsg( 'mergehistory-from' ), 'target' )."</td>
 129                                 <td>".Xml::input( 'target', 30, $this->mTarget, array('id'=>'target') )."</td>
 130                         </tr><tr>
 131                                 <td>".Xml::label( wfMsg( 'mergehistory-into' ), 'dest' )."</td>
 132                                 <td>".Xml::input( 'dest', 30, $this->mDest, array('id'=>'dest') )."</td>
 133                         </tr><tr><td>" .
 134                         Xml::submitButton( wfMsg( 'mergehistory-go' ) ) .
 135                         "</td></tr>" .
 136                         Xml::closeElement( 'table' ) .
 137                         '</fieldset>' .
 138                         '</form>' );
 139         }
 140
 141         private function showHistory() {
 142                 global $wgLang, $wgUser, $wgOut;
 143
 144                 $this->sk = $wgUser->getSkin();
 145
 146                 $wgOut->setPagetitle( wfMsg( "mergehistory" ) );
 147
 148                 $this->showMergeForm();
 149
 150                 # List all stored revisions
 151                 $revisions = new MergeHistoryPager( $this, array(), $this->mTargetObj, $this->mDestObj );
 152                 $haveRevisions = $revisions && $revisions->getNumRows() > 0;
 153
 154                 $titleObj = $this->getTitle();
 155                 $action = $titleObj->getLocalURL( array( 'action' => 'submit' ) );
 156                 # Start the form here
 157                 $top = Xml::openElement( 'form', array( 'method' => 'post', 'action' => $action, 'id' => 'merge' ) );
 158                 $wgOut->addHTML( $top );
 159
 160                 if( $haveRevisions ) {
 161                         # Format the user-visible controls (comment field, submission button)
 162                         # in a nice little table
 163                         $table =
 164                                 Xml::openElement( 'fieldset' ) .
 165                                 wfMsgExt( 'mergehistory-merge', array('parseinline'),
 166                                         $this->mTargetObj->getPrefixedText(), $this->mDestObj->getPrefixedText() ) .
 167                                 Xml::openElement( 'table', array( 'id' => 'mw-mergehistory-table' ) ) .
 168                                         "<tr>
 169                                                 <td class='mw-label'>" .
 170                                                         Xml::label( wfMsg( 'mergehistory-reason' ), 'wpComment' ) .
 171                                                 "</td>
 172                                                 <td class='mw-input'>" .
 173                                                         Xml::input( 'wpComment', 50, $this->mComment, array('id' => 'wpComment') ) .
 174                                                 "</td>
 175                                         </tr>
 176                                         <tr>
 177                                                 <td>&nbsp;</td>
 178                                                 <td class='mw-submit'>" .
 179                                                         Xml::submitButton( wfMsg( 'mergehistory-submit' ), array( 'name' => 'merge', 'id' => 'mw-merge-submit' ) ) .
 180                                                 "</td>
 181                                         </tr>" .
 182                                 Xml::closeElement( 'table' ) .
 183                                 Xml::closeElement( 'fieldset' );
 184
 185                         $wgOut->addHTML( $table );
 186                 }
 187
 188                 $wgOut->addHTML( "<h2 id=\"mw-mergehistory\">" . wfMsgHtml( "mergehistory-list" ) . "</h2>\n" );
 189
 190                 if( $haveRevisions ) {
 191                         $wgOut->addHTML( $revisions->getNavigationBar() );
 192                         $wgOut->addHTML( "<ul>" );
 193                         $wgOut->addHTML( $revisions->getBody() );
 194                         $wgOut->addHTML( "</ul>" );
 195                         $wgOut->addHTML( $revisions->getNavigationBar() );
 196                 } else {
 197                         $wgOut->addWikiMsg( "mergehistory-empty" );
 198                 }
 199
 200                 # Show relevant lines from the deletion log:
 201                 $wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'merge' ) ) . "</h2>\n" );
 202                 LogEventsList::showLogExtract( $wgOut, 'merge', $this->mTargetObj->getPrefixedText() );
 203
 204                 # When we submit, go by page ID to avoid some nasty but unlikely collisions.
 205                 # Such would happen if a page was renamed after the form loaded, but before submit
 206                 $misc = Xml::hidden( 'targetID', $this->mTargetObj->getArticleID() );
 207                 $misc .= Xml::hidden( 'destID', $this->mDestObj->getArticleID() );
 208                 $misc .= Xml::hidden( 'target', $this->mTarget );
 209                 $misc .= Xml::hidden( 'dest', $this->mDest );
 210                 $misc .= Xml::hidden( 'wpEditToken', $wgUser->editToken() );
 211                 $misc .= Xml::closeElement( 'form' );
 212                 $wgOut->addHTML( $misc );
 213
 214                 return true;
 215         }
 216
 217         function formatRevisionRow( $row ) {
 218                 global $wgLang;
 219
 220                 $rev = new Revision( $row );
 221
 222                 $stxt = '';
 223                 $last = $this->message['last'];
 224
 225                 $ts = wfTimestamp( TS_MW, $row->rev_timestamp );
 226                 $checkBox = Xml::radio( "mergepoint", $ts, false );
 227
 228                 $pageLink = $this->sk->linkKnown(
 229                         $rev->getTitle(),
 230                         htmlspecialchars( $wgLang->timeanddate( $ts ) ),
 231                         array(),
 232                         array( 'oldid' => $rev->getId() )
 233                 );
 234                 if( $rev->isDeleted( Revision::DELETED_TEXT ) ) {
 235                         $pageLink = '<span class="history-deleted">' . $pageLink . '</span>';
 236                 }
 237
 238                 # Last link
 239                 if( !$rev->userCan( Revision::DELETED_TEXT ) )
 240                         $last = $this->message['last'];
 241                 else if( isset($this->prevId[$row->rev_id]) )
 242                         $last = $this->sk->linkKnown(
 243                                 $rev->getTitle(),
 244                                 $this->message['last'],
 245                                 array(),
 246                                 array(
 247                                         'diff' => $row->rev_id,
 248                                         'oldid' => $this->prevId[$row->rev_id]
 249                                 )
 250                         );
 251
 252                 $userLink = $this->sk->revUserTools( $rev );
 253
 254                 if(!is_null($size = $row->rev_len)) {
 255                         $stxt = $this->sk->formatRevisionSize( $size );
 256                 }
 257                 $comment = $this->sk->revComment( $rev );
 258
 259                 return "<li>$checkBox ($last) $pageLink . . $userLink $stxt $comment</li>";
 260         }
 261
 262         /**
 263          * Fetch revision text link if it's available to all users
 264          * @return string
 265          */
 266         function getPageLink( $row, $titleObj, $ts, $target ) {
 267                 global $wgLang;
 268
 269                 if( !$this->userCan($row, Revision::DELETED_TEXT) ) {
 270                         return '<span class="history-deleted">' . $wgLang->timeanddate( $ts, true ) . '</span>';
 271                 } else {
 272                         $link = $this->sk->linkKnown(
 273                                 $titleObj,
 274                                 $wgLang->timeanddate( $ts, true ),
 275                                 array(),
 276                                 array(
 277                                         'target' => $target,
 278                                         'timestamp' => $ts
 279                                 )
 280                         );
 281                         if( $this->isDeleted($row, Revision::DELETED_TEXT) )
 282                                 $link = '<span class="history-deleted">' . $link . '</span>';
 283                         return $link;
 284                 }
 285         }
 286
 287         function merge() {
 288                 global $wgOut;
 289                 # Get the titles directly from the IDs, in case the target page params
 290                 # were spoofed. The queries are done based on the IDs, so it's best to
 291                 # keep it consistent...
 292                 $targetTitle = Title::newFromID( $this->mTargetID );
 293                 $destTitle = Title::newFromID( $this->mDestID );
 294                 if( is_null($targetTitle) || is_null($destTitle) )
 295                         return false; // validate these
 296                 if( $targetTitle->getArticleId() == $destTitle->getArticleId() )
 297                         return false;
 298                 # Verify that this timestamp is valid
 299                 # Must be older than the destination page
 300                 $dbw = wfGetDB( DB_MASTER );
 301                 # Get timestamp into DB format
 302                 $this->mTimestamp = $this->mTimestamp ? $dbw->timestamp($this->mTimestamp) : '';
 303                 # Max timestamp should be min of destination page
 304                 $maxtimestamp = $dbw->selectField( 'revision', 'MIN(rev_timestamp)',
 305                         array('rev_page' => $this->mDestID ),
 306                         __METHOD__ );
 307                 # Destination page must exist with revisions
 308                 if( !$maxtimestamp ) {
 309                         $wgOut->addWikiMsg('mergehistory-fail');
 310                         return false;
 311                 }
 312                 # Get the latest timestamp of the source
 313                 $lasttimestamp = $dbw->selectField( array('page','revision'),
 314                         'rev_timestamp',
 315                         array('page_id' => $this->mTargetID, 'page_latest = rev_id' ),
 316                         __METHOD__ );
 317                 # $this->mTimestamp must be older than $maxtimestamp
 318                 if( $this->mTimestamp >= $maxtimestamp ) {
 319                         $wgOut->addWikiMsg('mergehistory-fail');
 320                         return false;
 321                 }
 322                 # Update the revisions
 323                 if( $this->mTimestamp ) {
 324                         $timewhere = "rev_timestamp <= {$this->mTimestamp}";
 325                         $TimestampLimit = wfTimestamp(TS_MW,$this->mTimestamp);
 326                 } else {
 327                         $timewhere = "rev_timestamp <= {$maxtimestamp}";
 328                         $TimestampLimit = wfTimestamp(TS_MW,$lasttimestamp);
 329                 }
 330                 # Do the moving...
 331                 $dbw->update( 'revision',
 332                         array( 'rev_page' => $this->mDestID ),
 333                         array( 'rev_page' => $this->mTargetID,
 334                                 $timewhere ),
 335                         __METHOD__ );
 336
 337                 $count = $dbw->affectedRows();
 338                 # Make the source page a redirect if no revisions are left
 339                 $haveRevisions = $dbw->selectField( 'revision',
 340                         'rev_timestamp',
 341                         array( 'rev_page' => $this->mTargetID  ),
 342                         __METHOD__,
 343                         array( 'FOR UPDATE' ) );
 344                 if( !$haveRevisions ) {
 345                         if( $this->mComment ) {
 346                                 $comment = wfMsgForContent( 'mergehistory-comment', $targetTitle->getPrefixedText(),
 347                                         $destTitle->getPrefixedText(), $this->mComment );
 348                         } else {
 349                                 $comment = wfMsgForContent( 'mergehistory-autocomment', $targetTitle->getPrefixedText(),
 350                                         $destTitle->getPrefixedText() );
 351                         }
 352                         $mwRedir = MagicWord::get( 'redirect' );
 353                         $redirectText = $mwRedir->getSynonym( 0 ) . ' [[' . $destTitle->getPrefixedText() . "]]\n";
 354                         $redirectArticle = new Article( $targetTitle );
 355                         $redirectRevision = new Revision( array(
 356                                 'page'    => $this->mTargetID,
 357                                 'comment' => $comment,
 358                                 'text'    => $redirectText ) );
 359                         $redirectRevision->insertOn( $dbw );
 360                         $redirectArticle->updateRevisionOn( $dbw, $redirectRevision );
 361
 362                         # Now, we record the link from the redirect to the new title.
 363                         # It should have no other outgoing links...
 364                         $dbw->delete( 'pagelinks', array( 'pl_from' => $this->mDestID ), __METHOD__ );
 365                         $dbw->insert( 'pagelinks',
 366                                 array(
 367                                         'pl_from'      => $this->mDestID,
 368                                         'pl_namespace' => $destTitle->getNamespace(),
 369                                         'pl_title'     => $destTitle->getDBkey() ),
 370                                 __METHOD__ );
 371                 } else {
 372                         $targetTitle->invalidateCache(); // update histories
 373                 }
 374                 $destTitle->invalidateCache(); // update histories
 375                 # Check if this did anything
 376                 if( !$count ) {
 377                         $wgOut->addWikiMsg('mergehistory-fail');
 378                         return false;
 379                 }
 380                 # Update our logs
 381                 $log = new LogPage( 'merge' );
 382                 $log->addEntry( 'merge', $targetTitle, $this->mComment,
 383                         array($destTitle->getPrefixedText(),$TimestampLimit) );
 384
 385                 $wgOut->addHTML( wfMsgExt( 'mergehistory-success', array('parseinline'),
 386                         $targetTitle->getPrefixedText(), $destTitle->getPrefixedText(), $count ) );
 387
 388                 wfRunHooks( 'ArticleMergeComplete', array( $targetTitle, $destTitle ) );
 389
 390                 return true;
 391         }
 392 }
 393
 394 class MergeHistoryPager extends ReverseChronologicalPager {
 395         public $mForm, $mConds;
 396
 397         function __construct( $form, $conds = array(), $source, $dest ) {
 398                 $this->mForm = $form;
 399                 $this->mConds = $conds;
 400                 $this->title = $source;
 401                 $this->articleID = $source->getArticleID();
 402
 403                 $dbr = wfGetDB( DB_SLAVE );
 404                 $maxtimestamp = $dbr->selectField( 'revision', 'MIN(rev_timestamp)',
 405                         array('rev_page' => $dest->getArticleID() ),
 406                         __METHOD__ );
 407                 $this->maxTimestamp = $maxtimestamp;
 408
 409                 parent::__construct();
 410         }
 411
 412         function getStartBody() {
 413                 wfProfileIn( __METHOD__ );
 414                 # Do a link batch query
 415                 $this->mResult->seek( 0 );
 416                 $batch = new LinkBatch();
 417                 # Give some pointers to make (last) links
 418                 $this->mForm->prevId = array();
 419                 while( $row = $this->mResult->fetchObject() ) {
 420                         $batch->addObj( Title::makeTitleSafe( NS_USER, $row->rev_user_text ) );
 421                         $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->rev_user_text ) );
 422
 423                         $rev_id = isset($rev_id) ? $rev_id : $row->rev_id;
 424                         if( $rev_id > $row->rev_id )
 425                                 $this->mForm->prevId[$rev_id] = $row->rev_id;
 426                         else if( $rev_id < $row->rev_id )
 427                                 $this->mForm->prevId[$row->rev_id] = $rev_id;
 428
 429                         $rev_id = $row->rev_id;
 430                 }
 431
 432                 $batch->execute();
 433                 $this->mResult->seek( 0 );
 434
 435                 wfProfileOut( __METHOD__ );
 436                 return '';
 437         }
 438
 439         function formatRow( $row ) {
 440                 $block = new Block;
 441                 return $this->mForm->formatRevisionRow( $row );
 442         }
 443
 444         function getQueryInfo() {
 445                 $conds = $this->mConds;
 446                 $conds['rev_page'] = $this->articleID;
 447                 $conds[] = 'page_id = rev_page';
 448                 $conds[] = "rev_timestamp < {$this->maxTimestamp}";
 449                 return array(
 450                         'tables' => array('revision','page'),
 451                         'fields' => array( 'rev_minor_edit', 'rev_timestamp', 'rev_user', 'rev_user_text', 'rev_comment',
 452                                  'rev_id', 'rev_page', 'rev_parent_id', 'rev_text_id', 'rev_len', 'rev_deleted' ),
 453                         'conds' => $conds
 454                 );
 455         }
 456
 457         function getIndexField() {
 458                 return 'rev_timestamp';
 459         }
 460 }