includes/actions/pagers/HistoryPager.php

   1 <?php
   2 /**
   3  * Page history pager
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Actions
  22  */
  23
  24 use MediaWiki\MediaWikiServices;
  25
  26 /**
  27  * @ingroup Pager
  28  * @ingroup Actions
  29  */
  30 class HistoryPager extends ReverseChronologicalPager {
  31         /**
  32          * @var bool|stdClass
  33          */
  34         public $lastRow = false;
  35
  36         public $counter, $historyPage, $buttons, $conds;
  37
  38         protected $oldIdChecked;
  39
  40         protected $preventClickjacking = false;
  41         /**
  42          * @var array
  43          */
  44         protected $parentLens;
  45
  46         /** @var bool Whether to show the tag editing UI */
  47         protected $showTagEditUI;
  48
  49         /** @var string */
  50         private $tagFilter;
  51
  52         /**
  53          * @param HistoryAction $historyPage
  54          * @param string $year
  55          * @param string $month
  56          * @param string $tagFilter
  57          * @param array $conds
  58          * @param string $day
  59          */
  60         public function __construct(
  61                 HistoryAction $historyPage,
  62                 $year = '',
  63                 $month = '',
  64                 $tagFilter = '',
  65                 array $conds = [],
  66                 $day = ''
  67         ) {
  68                 parent::__construct( $historyPage->getContext() );
  69                 $this->historyPage = $historyPage;
  70                 $this->tagFilter = $tagFilter;
  71                 $this->getDateCond( $year, $month, $day );
  72                 $this->conds = $conds;
  73                 $this->showTagEditUI = ChangeTags::showTagEditingUI( $this->getUser() );
  74         }
  75
  76         // For hook compatibility...
  77         function getArticle() {
  78                 return $this->historyPage->getArticle();
  79         }
  80
  81         function getSqlComment() {
  82                 if ( $this->conds ) {
  83                         return 'history page filtered'; // potentially slow, see CR r58153
  84                 } else {
  85                         return 'history page unfiltered';
  86                 }
  87         }
  88
  89         function getQueryInfo() {
  90                 $revQuery = Revision::getQueryInfo( [ 'user' ] );
  91                 $queryInfo = [
  92                         'tables' => $revQuery['tables'],
  93                         'fields' => $revQuery['fields'],
  94                         'conds' => array_merge(
  95                                 [ 'rev_page' => $this->getWikiPage()->getId() ],
  96                                 $this->conds ),
  97                         'options' => [ 'USE INDEX' => [ 'revision' => 'page_timestamp' ] ],
  98                         'join_conds' => $revQuery['joins'],
  99                 ];
 100                 ChangeTags::modifyDisplayQuery(
 101                         $queryInfo['tables'],
 102                         $queryInfo['fields'],
 103                         $queryInfo['conds'],
 104                         $queryInfo['join_conds'],
 105                         $queryInfo['options'],
 106                         $this->tagFilter
 107                 );
 108
 109                 // Avoid PHP 7.1 warning of passing $this by reference
 110                 $historyPager = $this;
 111                 Hooks::run( 'PageHistoryPager::getQueryInfo', [ &$historyPager, &$queryInfo ] );
 112
 113                 return $queryInfo;
 114         }
 115
 116         function getIndexField() {
 117                 return 'rev_timestamp';
 118         }
 119
 120         /**
 121          * @param stdClass $row
 122          * @return string
 123          */
 124         function formatRow( $row ) {
 125                 if ( $this->lastRow ) {
 126                         $latest = ( $this->counter == 1 && $this->mIsFirst );
 127                         $firstInList = $this->counter == 1;
 128                         $this->counter++;
 129
 130                         $notifTimestamp = $this->getConfig()->get( 'ShowUpdatedMarker' )
 131                                 ? $this->getTitle()->getNotificationTimestamp( $this->getUser() )
 132                                 : false;
 133
 134                         $s = $this->historyLine(
 135                                 $this->lastRow, $row, $notifTimestamp, $latest, $firstInList );
 136                 } else {
 137                         $s = '';
 138                 }
 139                 $this->lastRow = $row;
 140
 141                 return $s;
 142         }
 143
 144         protected function doBatchLookups() {
 145                 if ( !Hooks::run( 'PageHistoryPager::doBatchLookups', [ $this, $this->mResult ] ) ) {
 146                         return;
 147                 }
 148
 149                 # Do a link batch query
 150                 $this->mResult->seek( 0 );
 151                 $batch = new LinkBatch();
 152                 $revIds = [];
 153                 foreach ( $this->mResult as $row ) {
 154                         if ( $row->rev_parent_id ) {
 155                                 $revIds[] = $row->rev_parent_id;
 156                         }
 157                         if ( $row->user_name !== null ) {
 158                                 $batch->add( NS_USER, $row->user_name );
 159                                 $batch->add( NS_USER_TALK, $row->user_name );
 160                         } else { # for anons or usernames of imported revisions
 161                                 $batch->add( NS_USER, $row->rev_user_text );
 162                                 $batch->add( NS_USER_TALK, $row->rev_user_text );
 163                         }
 164                 }
 165                 $this->parentLens = Revision::getParentLengths( $this->mDb, $revIds );
 166                 $batch->execute();
 167                 $this->mResult->seek( 0 );
 168         }
 169
 170         /**
 171          * Creates begin of history list with a submit button
 172          *
 173          * @return string HTML output
 174          */
 175         protected function getStartBody() {
 176                 $this->lastRow = false;
 177                 $this->counter = 1;
 178                 $this->oldIdChecked = 0;
 179
 180                 $this->getOutput()->wrapWikiMsg( "<div class='mw-history-legend'>\n$1\n</div>", 'histlegend' );
 181                 $s = Html::openElement( 'form', [ 'action' => wfScript(),
 182                         'id' => 'mw-history-compare' ] ) . "\n";
 183                 $s .= Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) . "\n";
 184                 $s .= Html::hidden( 'action', 'historysubmit' ) . "\n";
 185                 $s .= Html::hidden( 'type', 'revision' ) . "\n";
 186
 187                 // Button container stored in $this->buttons for re-use in getEndBody()
 188                 $this->buttons = '';
 189                 if ( $this->getNumRows() > 0 ) {
 190                         $this->buttons .= Html::openElement(
 191                                 'div', [ 'class' => 'mw-history-compareselectedversions' ] );
 192                         $className = 'historysubmit mw-history-compareselectedversions-button';
 193                         $attrs = [ 'class' => $className ]
 194                                 + Linker::tooltipAndAccesskeyAttribs( 'compareselectedversions' );
 195                         $this->buttons .= $this->submitButton( $this->msg( 'compareselectedversions' )->text(),
 196                                 $attrs
 197                         ) . "\n";
 198
 199                         $user = $this->getUser();
 200                         $actionButtons = '';
 201                         if ( $user->isAllowed( 'deleterevision' ) ) {
 202                                 $actionButtons .= $this->getRevisionButton(
 203                                         'revisiondelete', 'showhideselectedversions' );
 204                         }
 205                         if ( $this->showTagEditUI ) {
 206                                 $actionButtons .= $this->getRevisionButton(
 207                                         'editchangetags', 'history-edit-tags' );
 208                         }
 209                         if ( $actionButtons ) {
 210                                 $this->buttons .= Xml::tags( 'div', [ 'class' =>
 211                                         'mw-history-revisionactions' ], $actionButtons );
 212                         }
 213
 214                         if ( $user->isAllowed( 'deleterevision' ) || $this->showTagEditUI ) {
 215                                 $this->buttons .= ( new ListToggle( $this->getOutput() ) )->getHTML();
 216                         }
 217
 218                         $this->buttons .= '</div>';
 219
 220                         $s .= $this->buttons;
 221                 }
 222                 $s .= '<ul id="pagehistory">' . "\n";
 223
 224                 return $s;
 225         }
 226
 227         private function getRevisionButton( $name, $msg ) {
 228                 $this->preventClickjacking();
 229                 # Note T22966, <button> is non-standard in IE<8
 230                 $element = Html::element(
 231                         'button',
 232                         [
 233                                 'type' => 'submit',
 234                                 'name' => $name,
 235                                 'value' => '1',
 236                                 'class' => "historysubmit mw-history-$name-button",
 237                         ],
 238                         $this->msg( $msg )->text()
 239                 ) . "\n";
 240                 return $element;
 241         }
 242
 243         protected function getEndBody() {
 244                 if ( $this->lastRow ) {
 245                         $latest = $this->counter == 1 && $this->mIsFirst;
 246                         $firstInList = $this->counter == 1;
 247                         if ( $this->mIsBackwards ) {
 248                                 # Next row is unknown, but for UI reasons, probably exists if an offset has been specified
 249                                 if ( $this->mOffset == '' ) {
 250                                         $next = null;
 251                                 } else {
 252                                         $next = 'unknown';
 253                                 }
 254                         } else {
 255                                 # The next row is the past-the-end row
 256                                 $next = $this->mPastTheEndRow;
 257                         }
 258                         $this->counter++;
 259
 260                         $notifTimestamp = $this->getConfig()->get( 'ShowUpdatedMarker' )
 261                                 ? $this->getTitle()->getNotificationTimestamp( $this->getUser() )
 262                                 : false;
 263
 264                         $s = $this->historyLine(
 265                                 $this->lastRow, $next, $notifTimestamp, $latest, $firstInList );
 266                 } else {
 267                         $s = '';
 268                 }
 269                 $s .= "</ul>\n";
 270                 # Add second buttons only if there is more than one rev
 271                 if ( $this->getNumRows() > 2 ) {
 272                         $s .= $this->buttons;
 273                 }
 274                 $s .= '</form>';
 275
 276                 return $s;
 277         }
 278
 279         /**
 280          * Creates a submit button
 281          *
 282          * @param string $message Text of the submit button, will be escaped
 283          * @param array $attributes
 284          * @return string HTML output for the submit button
 285          */
 286         function submitButton( $message, $attributes = [] ) {
 287                 # Disable submit button if history has 1 revision only
 288                 if ( $this->getNumRows() > 1 ) {
 289                         return Html::submitButton( $message, $attributes );
 290                 } else {
 291                         return '';
 292                 }
 293         }
 294
 295         /**
 296          * Returns a row from the history printout.
 297          *
 298          * @todo document some more, and maybe clean up the code (some params redundant?)
 299          *
 300          * @param stdClass $row The database row corresponding to the previous line.
 301          * @param mixed $next The database row corresponding to the next line
 302          *   (chronologically previous)
 303          * @param bool|string $notificationtimestamp
 304          * @param bool $latest Whether this row corresponds to the page's latest revision.
 305          * @param bool $firstInList Whether this row corresponds to the first
 306          *   displayed on this history page.
 307          * @return string HTML output for the row
 308          */
 309         function historyLine( $row, $next, $notificationtimestamp = false,
 310                 $latest = false, $firstInList = false ) {
 311                 $rev = new Revision( $row, 0, $this->getTitle() );
 312
 313                 if ( is_object( $next ) ) {
 314                         $prevRev = new Revision( $next, 0, $this->getTitle() );
 315                 } else {
 316                         $prevRev = null;
 317                 }
 318
 319                 $curlink = $this->curLink( $rev, $latest );
 320                 $lastlink = $this->lastLink( $rev, $next );
 321                 $curLastlinks = Html::rawElement( 'span', [], $curlink ) .
 322                         Html::rawElement( 'span', [], $lastlink );
 323                 $histLinks = Html::rawElement(
 324                         'span',
 325                         [ 'class' => 'mw-history-histlinks mw-changeslist-links' ],
 326                         $curLastlinks
 327                 );
 328
 329                 $diffButtons = $this->diffButtons( $rev, $firstInList );
 330                 $s = $histLinks . $diffButtons;
 331
 332                 $link = $this->revLink( $rev );
 333                 $classes = [];
 334
 335                 $del = '';
 336                 $user = $this->getUser();
 337                 $canRevDelete = $user->isAllowed( 'deleterevision' );
 338                 // Show checkboxes for each revision, to allow for revision deletion and
 339                 // change tags
 340                 if ( $canRevDelete || $this->showTagEditUI ) {
 341                         $this->preventClickjacking();
 342                         // If revision was hidden from sysops and we don't need the checkbox
 343                         // for anything else, disable it
 344                         if ( !$this->showTagEditUI && !$rev->userCan( Revision::DELETED_RESTRICTED, $user ) ) {
 345                                 $del = Xml::check( 'deleterevisions', false, [ 'disabled' => 'disabled' ] );
 346                         // Otherwise, enable the checkbox...
 347                         } else {
 348                                 $del = Xml::check( 'showhiderevisions', false,
 349                                         [ 'name' => 'ids[' . $rev->getId() . ']' ] );
 350                         }
 351                 // User can only view deleted revisions...
 352                 } elseif ( $rev->getVisibility() && $user->isAllowed( 'deletedhistory' ) ) {
 353                         // If revision was hidden from sysops, disable the link
 354                         if ( !$rev->userCan( Revision::DELETED_RESTRICTED, $user ) ) {
 355                                 $del = Linker::revDeleteLinkDisabled( false );
 356                         // Otherwise, show the link...
 357                         } else {
 358                                 $query = [ 'type' => 'revision',
 359                                         'target' => $this->getTitle()->getPrefixedDBkey(), 'ids' => $rev->getId() ];
 360                                 $del .= Linker::revDeleteLink( $query,
 361                                         $rev->isDeleted( Revision::DELETED_RESTRICTED ), false );
 362                         }
 363                 }
 364                 if ( $del ) {
 365                         $s .= " $del ";
 366                 }
 367
 368                 $lang = $this->getLanguage();
 369                 $dirmark = $lang->getDirMark();
 370
 371                 $s .= " $link";
 372                 $s .= $dirmark;
 373                 $s .= " <span class='history-user'>" .
 374                         Linker::revUserTools( $rev, true, false ) . "</span>";
 375                 $s .= $dirmark;
 376
 377                 if ( $rev->isMinor() ) {
 378                         $s .= ' ' . ChangesList::flag( 'minor', $this->getContext() );
 379                 }
 380
 381                 # Sometimes rev_len isn't populated
 382                 if ( $rev->getSize() !== null ) {
 383                         # Size is always public data
 384                         $prevSize = $this->parentLens[$row->rev_parent_id] ?? 0;
 385                         $sDiff = ChangesList::showCharacterDifference( $prevSize, $rev->getSize() );
 386                         $fSize = Linker::formatRevisionSize( $rev->getSize(), false );
 387                         $s .= ' <span class="mw-changeslist-separator"></span> ' . "$fSize $sDiff";
 388                 }
 389
 390                 # Text following the character difference is added just before running hooks
 391                 $s2 = Linker::revComment( $rev, false, true, false );
 392
 393                 if ( $notificationtimestamp && ( $row->rev_timestamp >= $notificationtimestamp ) ) {
 394                         $s2 .= ' <span class="updatedmarker">' . $this->msg( 'updatedmarker' )->escaped() . '</span>';
 395                         $classes[] = 'mw-history-line-updated';
 396                 }
 397
 398                 $tools = [];
 399
 400                 # Rollback and undo links
 401                 if ( $prevRev && $this->getTitle()->quickUserCan( 'edit', $user ) ) {
 402                         if ( $latest && $this->getTitle()->quickUserCan( 'rollback', $user ) ) {
 403                                 // Get a rollback link without the brackets
 404                                 $rollbackLink = Linker::generateRollback(
 405                                         $rev,
 406                                         $this->getContext(),
 407                                         [ 'verify', 'noBrackets' ]
 408                                 );
 409                                 if ( $rollbackLink ) {
 410                                         $this->preventClickjacking();
 411                                         $tools[] = $rollbackLink;
 412                                 }
 413                         }
 414
 415                         if ( !$rev->isDeleted( Revision::DELETED_TEXT )
 416                                 && !$prevRev->isDeleted( Revision::DELETED_TEXT )
 417                         ) {
 418                                 # Create undo tooltip for the first (=latest) line only
 419                                 $undoTooltip = $latest
 420                                         ? [ 'title' => $this->msg( 'tooltip-undo' )->text() ]
 421                                         : [];
 422                                 $undolink = MediaWikiServices::getInstance()->getLinkRenderer()->makeKnownLink(
 423                                         $this->getTitle(),
 424                                         $this->msg( 'editundo' )->text(),
 425                                         $undoTooltip,
 426                                         [
 427                                                 'action' => 'edit',
 428                                                 'undoafter' => $prevRev->getId(),
 429                                                 'undo' => $rev->getId()
 430                                         ]
 431                                 );
 432                                 $tools[] = "<span class=\"mw-history-undo\">{$undolink}</span>";
 433                         }
 434                 }
 435                 // Allow extension to add their own links here
 436                 Hooks::run( 'HistoryRevisionTools', [ $rev, &$tools, $prevRev, $user ] );
 437
 438                 if ( $tools ) {
 439                         $s2 .= ' ' . Html::openElement( 'span', [ 'class' => 'mw-changeslist-links' ] );
 440                         foreach ( $tools as $tool ) {
 441                                 $s2 .= Html::rawElement( 'span', [], $tool );
 442                         }
 443                         $s2 .= Html::closeElement( 'span' );
 444                 }
 445
 446                 # Tags
 447                 list( $tagSummary, $newClasses ) = ChangeTags::formatSummaryRow(
 448                         $row->ts_tags,
 449                         'history',
 450                         $this->getContext()
 451                 );
 452                 $classes = array_merge( $classes, $newClasses );
 453                 if ( $tagSummary !== '' ) {
 454                         $s2 .= " $tagSummary";
 455                 }
 456
 457                 # Include separator between character difference and following text
 458                 if ( $s2 !== '' ) {
 459                         $s .= ' <span class="mw-changeslist-separator"></span> ' . $s2;
 460                 }
 461
 462                 $attribs = [ 'data-mw-revid' => $rev->getId() ];
 463
 464                 Hooks::run( 'PageHistoryLineEnding', [ $this, &$row, &$s, &$classes, &$attribs ] );
 465                 $attribs = array_filter( $attribs,
 466                         [ Sanitizer::class, 'isReservedDataAttribute' ],
 467                         ARRAY_FILTER_USE_KEY
 468                 );
 469
 470                 if ( $classes ) {
 471                         $attribs['class'] = implode( ' ', $classes );
 472                 }
 473
 474                 return Xml::tags( 'li', $attribs, $s ) . "\n";
 475         }
 476
 477         /**
 478          * Create a link to view this revision of the page
 479          *
 480          * @param Revision $rev
 481          * @return string
 482          */
 483         function revLink( $rev ) {
 484                 return ChangesList::revDateLink( $rev, $this->getUser(), $this->getLanguage(),
 485                         $this->getTitle() );
 486         }
 487
 488         /**
 489          * Create a diff-to-current link for this revision for this page
 490          *
 491          * @param Revision $rev
 492          * @param bool $latest This is the latest revision of the page?
 493          * @return string
 494          */
 495         function curLink( $rev, $latest ) {
 496                 $cur = $this->historyPage->message['cur'];
 497                 if ( $latest || !$rev->userCan( Revision::DELETED_TEXT, $this->getUser() ) ) {
 498                         return $cur;
 499                 } else {
 500                         return MediaWikiServices::getInstance()->getLinkRenderer()->makeKnownLink(
 501                                 $this->getTitle(),
 502                                 new HtmlArmor( $cur ),
 503                                 [],
 504                                 [
 505                                         'diff' => $this->getWikiPage()->getLatest(),
 506                                         'oldid' => $rev->getId()
 507                                 ]
 508                         );
 509                 }
 510         }
 511
 512         /**
 513          * Create a diff-to-previous link for this revision for this page.
 514          *
 515          * @param Revision $prevRev The revision being displayed
 516          * @param stdClass|string|null $next The next revision in list (that is
 517          *        the previous one in chronological order).
 518          *        May either be a row, "unknown" or null.
 519          * @return string
 520          */
 521         function lastLink( $prevRev, $next ) {
 522                 $last = $this->historyPage->message['last'];
 523
 524                 if ( $next === null ) {
 525                         # Probably no next row
 526                         return $last;
 527                 }
 528
 529                 $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
 530                 if ( $next === 'unknown' ) {
 531                         # Next row probably exists but is unknown, use an oldid=prev link
 532                         return $linkRenderer->makeKnownLink(
 533                                 $this->getTitle(),
 534                                 new HtmlArmor( $last ),
 535                                 [],
 536                                 [
 537                                         'diff' => $prevRev->getId(),
 538                                         'oldid' => 'prev'
 539                                 ]
 540                         );
 541                 }
 542
 543                 $nextRev = new Revision( $next, 0, $this->getTitle() );
 544
 545                 if ( !$prevRev->userCan( Revision::DELETED_TEXT, $this->getUser() )
 546                         || !$nextRev->userCan( Revision::DELETED_TEXT, $this->getUser() )
 547                 ) {
 548                         return $last;
 549                 }
 550
 551                 return $linkRenderer->makeKnownLink(
 552                         $this->getTitle(),
 553                         new HtmlArmor( $last ),
 554                         [],
 555                         [
 556                                 'diff' => $prevRev->getId(),
 557                                 'oldid' => $next->rev_id
 558                         ]
 559                 );
 560         }
 561
 562         /**
 563          * Create radio buttons for page history
 564          *
 565          * @param Revision $rev
 566          * @param bool $firstInList Is this version the first one?
 567          *
 568          * @return string HTML output for the radio buttons
 569          */
 570         function diffButtons( $rev, $firstInList ) {
 571                 if ( $this->getNumRows() > 1 ) {
 572                         $id = $rev->getId();
 573                         $radio = [ 'type' => 'radio', 'value' => $id ];
 574                         /** @todo Move title texts to javascript */
 575                         if ( $firstInList ) {
 576                                 $first = Xml::element( 'input',
 577                                         array_merge( $radio, [
 578                                                 'style' => 'visibility:hidden',
 579                                                 'name' => 'oldid',
 580                                                 'id' => 'mw-oldid-null' ] )
 581                                 );
 582                                 $checkmark = [ 'checked' => 'checked' ];
 583                         } else {
 584                                 # Check visibility of old revisions
 585                                 if ( !$rev->userCan( Revision::DELETED_TEXT, $this->getUser() ) ) {
 586                                         $radio['disabled'] = 'disabled';
 587                                         $checkmark = []; // We will check the next possible one
 588                                 } elseif ( !$this->oldIdChecked ) {
 589                                         $checkmark = [ 'checked' => 'checked' ];
 590                                         $this->oldIdChecked = $id;
 591                                 } else {
 592                                         $checkmark = [];
 593                                 }
 594                                 $first = Xml::element( 'input',
 595                                         array_merge( $radio, $checkmark, [
 596                                                 'name' => 'oldid',
 597                                                 'id' => "mw-oldid-$id" ] ) );
 598                                 $checkmark = [];
 599                         }
 600                         $second = Xml::element( 'input',
 601                                 array_merge( $radio, $checkmark, [
 602                                         'name' => 'diff',
 603                                         'id' => "mw-diff-$id" ] ) );
 604
 605                         return $first . $second;
 606                 } else {
 607                         return '';
 608                 }
 609         }
 610
 611         /**
 612          * @inheritDoc
 613          */
 614         function getDefaultQuery() {
 615                 parent::getDefaultQuery();
 616                 unset( $this->mDefaultQuery['date-range-to'] );
 617                 return $this->mDefaultQuery;
 618         }
 619
 620         /**
 621          * This is called if a write operation is possible from the generated HTML
 622          * @param bool $enable
 623          */
 624         function preventClickjacking( $enable = true ) {
 625                 $this->preventClickjacking = $enable;
 626         }
 627
 628         /**
 629          * Get the "prevent clickjacking" flag
 630          * @return bool
 631          */
 632         function getPreventClickjacking() {
 633                 return $this->preventClickjacking;
 634         }
 635
 636 }