includes/ProtectionForm.php

   1 <?php
   2 /**
   3  * Page protection
   4  *
   5  * Copyright © 2005 Brion Vibber <brion@pobox.com>
   6  * https://www.mediawiki.org/
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  21  * http://www.gnu.org/copyleft/gpl.html
  22  *
  23  * @file
  24  */
  25
  26 /**
  27  * Handles the page protection UI and backend
  28  */
  29 class ProtectionForm {
  30         /** @var array A map of action to restriction level, from request or default */
  31         protected $mRestrictions = array();
  32
  33         /** @var string The custom/additional protection reason */
  34         protected $mReason = '';
  35
  36         /** @var string The reason selected from the list, blank for other/additional */
  37         protected $mReasonSelection = '';
  38
  39         /** @var bool True if the restrictions are cascading, from request or existing protection */
  40         protected $mCascade = false;
  41
  42         /** @var array Map of action to "other" expiry time. Used in preference to mExpirySelection. */
  43         protected $mExpiry = array();
  44
  45         /**
  46          * @var array Map of action to value selected in expiry drop-down list.
  47          * Will be set to 'othertime' whenever mExpiry is set.
  48          */
  49         protected $mExpirySelection = array();
  50
  51         /** @var array Permissions errors for the protect action */
  52         protected $mPermErrors = array();
  53
  54         /** @var array Types (i.e. actions) for which levels can be selected */
  55         protected $mApplicableTypes = array();
  56
  57         /** @var array Map of action to the expiry time of the existing protection */
  58         protected $mExistingExpiry = array();
  59
  60         function __construct( Page $article ) {
  61                 global $wgUser;
  62                 // Set instance variables.
  63                 $this->mArticle = $article;
  64                 $this->mTitle = $article->getTitle();
  65                 $this->mApplicableTypes = $this->mTitle->getRestrictionTypes();
  66
  67                 // Check if the form should be disabled.
  68                 // If it is, the form will be available in read-only to show levels.
  69                 $this->mPermErrors = $this->mTitle->getUserPermissionsErrors( 'protect', $wgUser );
  70                 if ( wfReadOnly() ) {
  71                         $this->mPermErrors[] = array( 'readonlytext', wfReadOnlyReason() );
  72                 }
  73                 $this->disabled = $this->mPermErrors != array();
  74                 $this->disabledAttrib = $this->disabled
  75                         ? array( 'disabled' => 'disabled' )
  76                         : array();
  77
  78                 $this->loadData();
  79         }
  80
  81         /**
  82          * Loads the current state of protection into the object.
  83          */
  84         function loadData() {
  85                 global $wgRequest, $wgUser;
  86
  87                 $levels = MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace(), $wgUser );
  88                 $this->mCascade = $this->mTitle->areRestrictionsCascading();
  89
  90                 $this->mReason = $wgRequest->getText( 'mwProtect-reason' );
  91                 $this->mReasonSelection = $wgRequest->getText( 'wpProtectReasonSelection' );
  92                 $this->mCascade = $wgRequest->getBool( 'mwProtect-cascade', $this->mCascade );
  93
  94                 foreach ( $this->mApplicableTypes as $action ) {
  95                         // @todo FIXME: This form currently requires individual selections,
  96                         // but the db allows multiples separated by commas.
  97
  98                         // Pull the actual restriction from the DB
  99                         $this->mRestrictions[$action] = implode( '', $this->mTitle->getRestrictions( $action ) );
 100
 101                         if ( !$this->mRestrictions[$action] ) {
 102                                 // No existing expiry
 103                                 $existingExpiry = '';
 104                         } else {
 105                                 $existingExpiry = $this->mTitle->getRestrictionExpiry( $action );
 106                         }
 107                         $this->mExistingExpiry[$action] = $existingExpiry;
 108
 109                         $requestExpiry = $wgRequest->getText( "mwProtect-expiry-$action" );
 110                         $requestExpirySelection = $wgRequest->getVal( "wpProtectExpirySelection-$action" );
 111
 112                         if ( $requestExpiry ) {
 113                                 // Custom expiry takes precedence
 114                                 $this->mExpiry[$action] = $requestExpiry;
 115                                 $this->mExpirySelection[$action] = 'othertime';
 116                         } elseif ( $requestExpirySelection ) {
 117                                 // Expiry selected from list
 118                                 $this->mExpiry[$action] = '';
 119                                 $this->mExpirySelection[$action] = $requestExpirySelection;
 120                         } elseif ( $existingExpiry == 'infinity' ) {
 121                                 // Existing expiry is infinite, use "infinite" in drop-down
 122                                 $this->mExpiry[$action] = '';
 123                                 $this->mExpirySelection[$action] = 'infinite';
 124                         } elseif ( $existingExpiry ) {
 125                                 // Use existing expiry in its own list item
 126                                 $this->mExpiry[$action] = '';
 127                                 $this->mExpirySelection[$action] = $existingExpiry;
 128                         } else {
 129                                 // Final default: infinite
 130                                 $this->mExpiry[$action] = '';
 131                                 $this->mExpirySelection[$action] = 'infinite';
 132                         }
 133
 134                         $val = $wgRequest->getVal( "mwProtect-level-$action" );
 135                         if ( isset( $val ) && in_array( $val, $levels ) ) {
 136                                 $this->mRestrictions[$action] = $val;
 137                         }
 138                 }
 139         }
 140
 141         /**
 142          * Get the expiry time for a given action, by combining the relevant inputs.
 143          *
 144          * @param string $action
 145          *
 146          * @return string 14-char timestamp or "infinity", or false if the input was invalid
 147          */
 148         function getExpiry( $action ) {
 149                 if ( $this->mExpirySelection[$action] == 'existing' ) {
 150                         return $this->mExistingExpiry[$action];
 151                 } elseif ( $this->mExpirySelection[$action] == 'othertime' ) {
 152                         $value = $this->mExpiry[$action];
 153                 } else {
 154                         $value = $this->mExpirySelection[$action];
 155                 }
 156                 if ( $value == 'infinite' || $value == 'indefinite' || $value == 'infinity' ) {
 157                         $time = wfGetDB( DB_SLAVE )->getInfinity();
 158                 } else {
 159                         $unix = strtotime( $value );
 160
 161                         if ( !$unix || $unix === -1 ) {
 162                                 return false;
 163                         }
 164
 165                         // @todo FIXME: Non-qualified absolute times are not in users specified timezone
 166                         // and there isn't notice about it in the ui
 167                         $time = wfTimestamp( TS_MW, $unix );
 168                 }
 169                 return $time;
 170         }
 171
 172         /**
 173          * Main entry point for action=protect and action=unprotect
 174          */
 175         function execute() {
 176                 global $wgRequest, $wgOut;
 177
 178                 if ( MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) === array( '' ) ) {
 179                         throw new ErrorPageError( 'protect-badnamespace-title', 'protect-badnamespace-text' );
 180                 }
 181
 182                 if ( $wgRequest->wasPosted() ) {
 183                         if ( $this->save() ) {
 184                                 $q = $this->mArticle->isRedirect() ? 'redirect=no' : '';
 185                                 $wgOut->redirect( $this->mTitle->getFullURL( $q ) );
 186                         }
 187                 } else {
 188                         $this->show();
 189                 }
 190         }
 191
 192         /**
 193          * Show the input form with optional error message
 194          *
 195          * @param string $err Error message or null if there's no error
 196          */
 197         function show( $err = null ) {
 198                 global $wgOut;
 199
 200                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 201                 $wgOut->addBacklinkSubtitle( $this->mTitle );
 202
 203                 if ( is_array( $err ) ) {
 204                         $wgOut->wrapWikiMsg( "<p class='error'>\n$1\n</p>\n", $err );
 205                 } elseif ( is_string( $err ) ) {
 206                         $wgOut->addHTML( "<p class='error'>{$err}</p>\n" );
 207                 }
 208
 209                 if ( $this->mTitle->getRestrictionTypes() === array() ) {
 210                         // No restriction types available for the current title
 211                         // this might happen if an extension alters the available types
 212                         $wgOut->setPageTitle( wfMessage(
 213                                 'protect-norestrictiontypes-title',
 214                                 $this->mTitle->getPrefixedText()
 215                         ) );
 216                         $wgOut->addWikiText( wfMessage( 'protect-norestrictiontypes-text' )->text() );
 217
 218                         // Show the log in case protection was possible once
 219                         $this->showLogExtract( $wgOut );
 220                         // return as there isn't anything else we can do
 221                         return;
 222                 }
 223
 224                 list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
 225                 if ( $cascadeSources && count( $cascadeSources ) > 0 ) {
 226                         $titles = '';
 227
 228                         foreach ( $cascadeSources as $title ) {
 229                                 $titles .= '* [[:' . $title->getPrefixedText() . "]]\n";
 230                         }
 231
 232                         /** @todo FIXME: i18n issue, should use formatted number. */
 233                         $wgOut->wrapWikiMsg(
 234                                 "<div id=\"mw-protect-cascadeon\">\n$1\n" . $titles . "</div>",
 235                                 array( 'protect-cascadeon', count( $cascadeSources ) )
 236                         );
 237                 }
 238
 239                 # Show an appropriate message if the user isn't allowed or able to change
 240                 # the protection settings at this time
 241                 if ( $this->disabled ) {
 242                         $wgOut->setPageTitle(
 243                                 wfMessage( 'protect-title-notallowed',
 244                                         $this->mTitle->getPrefixedText() )
 245                         );
 246                         $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $this->mPermErrors, 'protect' ) );
 247                 } else {
 248                         $wgOut->setPageTitle( wfMessage( 'protect-title', $this->mTitle->getPrefixedText() ) );
 249                         $wgOut->addWikiMsg( 'protect-text',
 250                                 wfEscapeWikiText( $this->mTitle->getPrefixedText() ) );
 251                 }
 252
 253                 $wgOut->addHTML( $this->buildForm() );
 254                 $this->showLogExtract( $wgOut );
 255         }
 256
 257         /**
 258          * Save submitted protection form
 259          *
 260          * @return bool Success
 261          */
 262         function save() {
 263                 global $wgRequest, $wgUser, $wgOut;
 264
 265                 # Permission check!
 266                 if ( $this->disabled ) {
 267                         $this->show();
 268                         return false;
 269                 }
 270
 271                 $token = $wgRequest->getVal( 'wpEditToken' );
 272                 if ( !$wgUser->matchEditToken( $token, array( 'protect', $this->mTitle->getPrefixedDBkey() ) ) ) {
 273                         $this->show( array( 'sessionfailure' ) );
 274                         return false;
 275                 }
 276
 277                 # Create reason string. Use list and/or custom string.
 278                 $reasonstr = $this->mReasonSelection;
 279                 if ( $reasonstr != 'other' && $this->mReason != '' ) {
 280                         // Entry from drop down menu + additional comment
 281                         $reasonstr .= wfMessage( 'colon-separator' )->text() . $this->mReason;
 282                 } elseif ( $reasonstr == 'other' ) {
 283                         $reasonstr = $this->mReason;
 284                 }
 285                 $expiry = array();
 286                 foreach ( $this->mApplicableTypes as $action ) {
 287                         $expiry[$action] = $this->getExpiry( $action );
 288                         if ( empty( $this->mRestrictions[$action] ) ) {
 289                                 continue; // unprotected
 290                         }
 291                         if ( !$expiry[$action] ) {
 292                                 $this->show( array( 'protect_expiry_invalid' ) );
 293                                 return false;
 294                         }
 295                         if ( $expiry[$action] < wfTimestampNow() ) {
 296                                 $this->show( array( 'protect_expiry_old' ) );
 297                                 return false;
 298                         }
 299                 }
 300
 301                 $this->mCascade = $wgRequest->getBool( 'mwProtect-cascade' );
 302
 303                 $status = $this->mArticle->doUpdateRestrictions(
 304                         $this->mRestrictions,
 305                         $expiry,
 306                         $this->mCascade,
 307                         $reasonstr,
 308                         $wgUser
 309                 );
 310
 311                 if ( !$status->isOK() ) {
 312                         $this->show( $wgOut->parseInline( $status->getWikiText() ) );
 313                         return false;
 314                 }
 315
 316                 /**
 317                  * Give extensions a change to handle added form items
 318                  *
 319                  * @since 1.19 you can (and you should) return false to abort saving;
 320                  *             you can also return an array of message name and its parameters
 321                  */
 322                 $errorMsg = '';
 323                 if ( !wfRunHooks( 'ProtectionForm::save', array( $this->mArticle, &$errorMsg, $reasonstr ) ) ) {
 324                         if ( $errorMsg == '' ) {
 325                                 $errorMsg = array( 'hookaborted' );
 326                         }
 327                 }
 328                 if ( $errorMsg != '' ) {
 329                         $this->show( $errorMsg );
 330                         return false;
 331                 }
 332
 333                 WatchAction::doWatchOrUnwatch( $wgRequest->getCheck( 'mwProtectWatch' ), $this->mTitle, $wgUser );
 334
 335                 return true;
 336         }
 337
 338         /**
 339          * Build the input form
 340          *
 341          * @return string HTML form
 342          */
 343         function buildForm() {
 344                 global $wgUser, $wgLang, $wgOut;
 345
 346                 $mProtectreasonother = Xml::label(
 347                         wfMessage( 'protectcomment' )->text(),
 348                         'wpProtectReasonSelection'
 349                 );
 350                 $mProtectreason = Xml::label(
 351                         wfMessage( 'protect-otherreason' )->text(),
 352                         'mwProtect-reason'
 353                 );
 354
 355                 $out = '';
 356                 if ( !$this->disabled ) {
 357                         $wgOut->addModules( 'mediawiki.legacy.protect' );
 358                         $out .= Xml::openElement( 'form', array( 'method' => 'post',
 359                                 'action' => $this->mTitle->getLocalURL( 'action=protect' ),
 360                                 'id' => 'mw-Protect-Form', 'onsubmit' => 'ProtectionForm.enableUnchainedInputs(true)' ) );
 361                 }
 362
 363                 $out .= Xml::openElement( 'fieldset' ) .
 364                         Xml::element( 'legend', null, wfMessage( 'protect-legend' )->text() ) .
 365                         Xml::openElement( 'table', array( 'id' => 'mwProtectSet' ) ) .
 366                         Xml::openElement( 'tbody' );
 367
 368                 // Not all languages have V_x <-> N_x relation
 369                 foreach ( $this->mRestrictions as $action => $selected ) {
 370                         // Messages:
 371                         // restriction-edit, restriction-move, restriction-create, restriction-upload
 372                         $msg = wfMessage( 'restriction-' . $action );
 373                         $out .= "<tr><td>" .
 374                         Xml::openElement( 'fieldset' ) .
 375                         Xml::element( 'legend', null, $msg->exists() ? $msg->text() : $action ) .
 376                         Xml::openElement( 'table', array( 'id' => "mw-protect-table-$action" ) ) .
 377                                 "<tr><td>" . $this->buildSelector( $action, $selected ) . "</td></tr><tr><td>";
 378
 379                         $reasonDropDown = Xml::listDropDown( 'wpProtectReasonSelection',
 380                                 wfMessage( 'protect-dropdown' )->inContentLanguage()->text(),
 381                                 wfMessage( 'protect-otherreason-op' )->inContentLanguage()->text(),
 382                                 $this->mReasonSelection,
 383                                 'mwProtect-reason', 4 );
 384                         $scExpiryOptions = wfMessage( 'protect-expiry-options' )->inContentLanguage()->text();
 385
 386                         $showProtectOptions = $scExpiryOptions !== '-' && !$this->disabled;
 387
 388                         $mProtectexpiry = Xml::label(
 389                                 wfMessage( 'protectexpiry' )->text(),
 390                                 "mwProtectExpirySelection-$action"
 391                         );
 392                         $mProtectother = Xml::label(
 393                                 wfMessage( 'protect-othertime' )->text(),
 394                                 "mwProtect-$action-expires"
 395                         );
 396
 397                         $expiryFormOptions = '';
 398                         if ( $this->mExistingExpiry[$action] && $this->mExistingExpiry[$action] != 'infinity' ) {
 399                                 $timestamp = $wgLang->timeanddate( $this->mExistingExpiry[$action], true );
 400                                 $d = $wgLang->date( $this->mExistingExpiry[$action], true );
 401                                 $t = $wgLang->time( $this->mExistingExpiry[$action], true );
 402                                 $expiryFormOptions .=
 403                                         Xml::option(
 404                                                 wfMessage( 'protect-existing-expiry', $timestamp, $d, $t )->text(),
 405                                                 'existing',
 406                                                 $this->mExpirySelection[$action] == 'existing'
 407                                         ) . "\n";
 408                         }
 409
 410                         $expiryFormOptions .= Xml::option(
 411                                 wfMessage( 'protect-othertime-op' )->text(),
 412                                 "othertime"
 413                         ) . "\n";
 414                         foreach ( explode( ',', $scExpiryOptions ) as $option ) {
 415                                 if ( strpos( $option, ":" ) === false ) {
 416                                         $show = $value = $option;
 417                                 } else {
 418                                         list( $show, $value ) = explode( ":", $option );
 419                                 }
 420                                 $show = htmlspecialchars( $show );
 421                                 $value = htmlspecialchars( $value );
 422                                 $expiryFormOptions .= Xml::option(
 423                                         $show,
 424                                         $value,
 425                                         $this->mExpirySelection[$action] === $value
 426                                 ) . "\n";
 427                         }
 428                         # Add expiry dropdown
 429                         if ( $showProtectOptions && !$this->disabled ) {
 430                                 $out .= "
 431                                         <table><tr>
 432                                                 <td class='mw-label'>
 433                                                         {$mProtectexpiry}
 434                                                 </td>
 435                                                 <td class='mw-input'>" .
 436                                                         Xml::tags( 'select',
 437                                                                 array(
 438                                                                         'id' => "mwProtectExpirySelection-$action",
 439                                                                         'name' => "wpProtectExpirySelection-$action",
 440                                                                         'onchange' => "ProtectionForm.updateExpiryList(this)",
 441                                                                         'tabindex' => '2' ) + $this->disabledAttrib,
 442                                                                 $expiryFormOptions ) .
 443                                                 "</td>
 444                                         </tr></table>";
 445                         }
 446                         # Add custom expiry field
 447                         $attribs = array( 'id' => "mwProtect-$action-expires",
 448                                 'onkeyup' => 'ProtectionForm.updateExpiry(this)',
 449                                 'onchange' => 'ProtectionForm.updateExpiry(this)' ) + $this->disabledAttrib;
 450                         $out .= "<table><tr>
 451                                         <td class='mw-label'>" .
 452                                                 $mProtectother .
 453                                         '</td>
 454                                         <td class="mw-input">' .
 455                                                 Xml::input( "mwProtect-expiry-$action", 50, $this->mExpiry[$action], $attribs ) .
 456                                         '</td>
 457                                 </tr></table>';
 458                         $out .= "</td></tr>" .
 459                         Xml::closeElement( 'table' ) .
 460                         Xml::closeElement( 'fieldset' ) .
 461                         "</td></tr>";
 462                 }
 463                 # Give extensions a chance to add items to the form
 464                 wfRunHooks( 'ProtectionForm::buildForm', array( $this->mArticle, &$out ) );
 465
 466                 $out .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
 467
 468                 // JavaScript will add another row with a value-chaining checkbox
 469                 if ( $this->mTitle->exists() ) {
 470                         $out .= Xml::openElement( 'table', array( 'id' => 'mw-protect-table2' ) ) .
 471                                 Xml::openElement( 'tbody' );
 472                         $out .= '<tr>
 473                                         <td></td>
 474                                         <td class="mw-input">' .
 475                                                 Xml::checkLabel(
 476                                                         wfMessage( 'protect-cascade' )->text(),
 477                                                         'mwProtect-cascade',
 478                                                         'mwProtect-cascade',
 479                                                         $this->mCascade, $this->disabledAttrib
 480                                                 ) .
 481                                         "</td>
 482                                 </tr>\n";
 483                         $out .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
 484                 }
 485
 486                 # Add manual and custom reason field/selects as well as submit
 487                 if ( !$this->disabled ) {
 488                         $out .= Xml::openElement( 'table', array( 'id' => 'mw-protect-table3' ) ) .
 489                                 Xml::openElement( 'tbody' );
 490                         $out .= "
 491                                 <tr>
 492                                         <td class='mw-label'>
 493                                                 {$mProtectreasonother}
 494                                         </td>
 495                                         <td class='mw-input'>
 496                                                 {$reasonDropDown}
 497                                         </td>
 498                                 </tr>
 499                                 <tr>
 500                                         <td class='mw-label'>
 501                                                 {$mProtectreason}
 502                                         </td>
 503                                         <td class='mw-input'>" .
 504                                                 Xml::input( 'mwProtect-reason', 60, $this->mReason, array( 'type' => 'text',
 505                                                         'id' => 'mwProtect-reason', 'maxlength' => 180 ) ) .
 506                                                         // Limited maxlength as the database trims at 255 bytes and other texts
 507                                                         // chosen by dropdown menus on this page are also included in this database field.
 508                                                         // The byte limit of 180 bytes is enforced in javascript
 509                                         "</td>
 510                                 </tr>";
 511                         # Disallow watching is user is not logged in
 512                         if ( $wgUser->isLoggedIn() ) {
 513                                 $out .= "
 514                                 <tr>
 515                                         <td></td>
 516                                         <td class='mw-input'>" .
 517                                                 Xml::checkLabel( wfMessage( 'watchthis' )->text(),
 518                                                         'mwProtectWatch', 'mwProtectWatch',
 519                                                         $wgUser->isWatched( $this->mTitle ) || $wgUser->getOption( 'watchdefault' ) ) .
 520                                         "</td>
 521                                 </tr>";
 522                         }
 523                         $out .= "
 524                                 <tr>
 525                                         <td></td>
 526                                         <td class='mw-submit'>" .
 527                                                 Xml::submitButton(
 528                                                         wfMessage( 'confirm' )->text(),
 529                                                         array( 'id' => 'mw-Protect-submit' )
 530                                                 ) .
 531                                         "</td>
 532                                 </tr>\n";
 533                         $out .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
 534                 }
 535                 $out .= Xml::closeElement( 'fieldset' );
 536
 537                 if ( $wgUser->isAllowed( 'editinterface' ) ) {
 538                         $title = Title::makeTitle( NS_MEDIAWIKI, 'Protect-dropdown' );
 539                         $link = Linker::link(
 540                                 $title,
 541                                 wfMessage( 'protect-edit-reasonlist' )->escaped(),
 542                                 array(),
 543                                 array( 'action' => 'edit' )
 544                         );
 545                         $out .= '<p class="mw-protect-editreasons">' . $link . '</p>';
 546                 }
 547
 548                 if ( !$this->disabled ) {
 549                         $out .= Html::hidden(
 550                                 'wpEditToken',
 551                                 $wgUser->getEditToken( array( 'protect', $this->mTitle->getPrefixedDBkey() ) )
 552                         );
 553                         $out .= Xml::closeElement( 'form' );
 554                         $wgOut->addScript( $this->buildCleanupScript() );
 555                 }
 556
 557                 return $out;
 558         }
 559
 560         /**
 561          * Build protection level selector
 562          *
 563          * @param string $action Action to protect
 564          * @param string $selected Current protection level
 565          * @return string HTML fragment
 566          */
 567         function buildSelector( $action, $selected ) {
 568                 global $wgUser;
 569
 570                 // If the form is disabled, display all relevant levels. Otherwise,
 571                 // just show the ones this user can use.
 572                 $levels = MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace(),
 573                         $this->disabled ? null : $wgUser
 574                 );
 575
 576                 $id = 'mwProtect-level-' . $action;
 577                 $attribs = array(
 578                         'id' => $id,
 579                         'name' => $id,
 580                         'size' => count( $levels ),
 581                         'onchange' => 'ProtectionForm.updateLevels(this)',
 582                         ) + $this->disabledAttrib;
 583
 584                 $out = Xml::openElement( 'select', $attribs );
 585                 foreach ( $levels as $key ) {
 586                         $out .= Xml::option( $this->getOptionLabel( $key ), $key, $key == $selected );
 587                 }
 588                 $out .= Xml::closeElement( 'select' );
 589                 return $out;
 590         }
 591
 592         /**
 593          * Prepare the label for a protection selector option
 594          *
 595          * @param string $permission Permission required
 596          * @return string
 597          */
 598         private function getOptionLabel( $permission ) {
 599                 if ( $permission == '' ) {
 600                         return wfMessage( 'protect-default' )->text();
 601                 } else {
 602                         // Messages: protect-level-autoconfirmed, protect-level-sysop
 603                         $msg = wfMessage( "protect-level-{$permission}" );
 604                         if ( $msg->exists() ) {
 605                                 return $msg->text();
 606                         }
 607                         return wfMessage( 'protect-fallback', $permission )->text();
 608                 }
 609         }
 610
 611         function buildCleanupScript() {
 612                 global $wgCascadingRestrictionLevels, $wgOut;
 613
 614                 $cascadeableLevels = $wgCascadingRestrictionLevels;
 615                 $options = array(
 616                         'tableId' => 'mwProtectSet',
 617                         'labelText' => wfMessage( 'protect-unchain-permissions' )->plain(),
 618                         'numTypes' => count( $this->mApplicableTypes ),
 619                         'existingMatch' => count( array_unique( $this->mExistingExpiry ) ) === 1,
 620                 );
 621
 622                 $wgOut->addJsConfigVars( 'wgCascadeableLevels', $cascadeableLevels );
 623                 $script = Xml::encodeJsCall( 'ProtectionForm.init', array( $options ) );
 624                 return Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) );
 625         }
 626
 627         /**
 628          * Show protection long extracts for this page
 629          *
 630          * @param OutputPage $out
 631          * @access private
 632          */
 633         function showLogExtract( &$out ) {
 634                 # Show relevant lines from the protection log:
 635                 $protectLogPage = new LogPage( 'protect' );
 636                 $out->addHTML( Xml::element( 'h2', null, $protectLogPage->getName()->text() ) );
 637                 LogEventsList::showLogExtract( $out, 'protect', $this->mTitle );
 638                 # Let extensions add other relevant log extracts
 639                 wfRunHooks( 'ProtectionForm::showLogExtract', array( $this->mArticle, $out ) );
 640         }
 641 }