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