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 = [];
  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 = [];
  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 = [];
  50
  51         /** @var array Permissions errors for the protect action */
  52         protected $mPermErrors = [];
  53
  54         /** @var array Types (i.e. actions) for which levels can be selected */
  55         protected $mApplicableTypes = [];
  56
  57         /** @var array Map of action to the expiry time of the existing protection */
  58         protected $mExistingExpiry = [];
  59
  60         /** @var IContextSource */
  61         private $mContext;
  62
  63         function __construct( Article $article ) {
  64                 // Set instance variables.
  65                 $this->mArticle = $article;
  66                 $this->mTitle = $article->getTitle();
  67                 $this->mApplicableTypes = $this->mTitle->getRestrictionTypes();
  68                 $this->mContext = $article->getContext();
  69
  70                 // Check if the form should be disabled.
  71                 // If it is, the form will be available in read-only to show levels.
  72                 $this->mPermErrors = $this->mTitle->getUserPermissionsErrors(
  73                         'protect',
  74                         $this->mContext->getUser(),
  75                         $this->mContext->getRequest()->wasPosted() ? 'secure' : 'full' // T92357
  76                 );
  77                 if ( wfReadOnly() ) {
  78                         $this->mPermErrors[] = [ 'readonlytext', wfReadOnlyReason() ];
  79                 }
  80                 $this->disabled = $this->mPermErrors != [];
  81                 $this->disabledAttrib = $this->disabled
  82                         ? [ 'disabled' => 'disabled' ]
  83                         : [];
  84
  85                 $this->loadData();
  86         }
  87
  88         /**
  89          * Loads the current state of protection into the object.
  90          */
  91         function loadData() {
  92                 $levels = MWNamespace::getRestrictionLevels(
  93                         $this->mTitle->getNamespace(), $this->mContext->getUser()
  94                 );
  95                 $this->mCascade = $this->mTitle->areRestrictionsCascading();
  96
  97                 $request = $this->mContext->getRequest();
  98                 $this->mReason = $request->getText( 'mwProtect-reason' );
  99                 $this->mReasonSelection = $request->getText( 'wpProtectReasonSelection' );
 100                 $this->mCascade = $request->getBool( 'mwProtect-cascade', $this->mCascade );
 101
 102                 foreach ( $this->mApplicableTypes as $action ) {
 103                         // @todo FIXME: This form currently requires individual selections,
 104                         // but the db allows multiples separated by commas.
 105
 106                         // Pull the actual restriction from the DB
 107                         $this->mRestrictions[$action] = implode( '', $this->mTitle->getRestrictions( $action ) );
 108
 109                         if ( !$this->mRestrictions[$action] ) {
 110                                 // No existing expiry
 111                                 $existingExpiry = '';
 112                         } else {
 113                                 $existingExpiry = $this->mTitle->getRestrictionExpiry( $action );
 114                         }
 115                         $this->mExistingExpiry[$action] = $existingExpiry;
 116
 117                         $requestExpiry = $request->getText( "mwProtect-expiry-$action" );
 118                         $requestExpirySelection = $request->getVal( "wpProtectExpirySelection-$action" );
 119
 120                         if ( $requestExpiry ) {
 121                                 // Custom expiry takes precedence
 122                                 $this->mExpiry[$action] = $requestExpiry;
 123                                 $this->mExpirySelection[$action] = 'othertime';
 124                         } elseif ( $requestExpirySelection ) {
 125                                 // Expiry selected from list
 126                                 $this->mExpiry[$action] = '';
 127                                 $this->mExpirySelection[$action] = $requestExpirySelection;
 128                         } elseif ( $existingExpiry ) {
 129                                 // Use existing expiry in its own list item
 130                                 $this->mExpiry[$action] = '';
 131                                 $this->mExpirySelection[$action] = $existingExpiry;
 132                         } else {
 133                                 // Catches 'infinity' - Existing expiry is infinite, use "infinite" in drop-down
 134                                 // Final default: infinite
 135                                 $this->mExpiry[$action] = '';
 136                                 $this->mExpirySelection[$action] = 'infinite';
 137                         }
 138
 139                         $val = $request->getVal( "mwProtect-level-$action" );
 140                         if ( isset( $val ) && in_array( $val, $levels ) ) {
 141                                 $this->mRestrictions[$action] = $val;
 142                         }
 143                 }
 144         }
 145
 146         /**
 147          * Get the expiry time for a given action, by combining the relevant inputs.
 148          *
 149          * @param string $action
 150          *
 151          * @return string|false 14-char timestamp or "infinity", or false if the input was invalid
 152          */
 153         function getExpiry( $action ) {
 154                 if ( $this->mExpirySelection[$action] == 'existing' ) {
 155                         return $this->mExistingExpiry[$action];
 156                 } elseif ( $this->mExpirySelection[$action] == 'othertime' ) {
 157                         $value = $this->mExpiry[$action];
 158                 } else {
 159                         $value = $this->mExpirySelection[$action];
 160                 }
 161                 if ( wfIsInfinity( $value ) ) {
 162                         $time = 'infinity';
 163                 } else {
 164                         $unix = strtotime( $value );
 165
 166                         if ( !$unix || $unix === -1 ) {
 167                                 return false;
 168                         }
 169
 170                         // @todo FIXME: Non-qualified absolute times are not in users specified timezone
 171                         // and there isn't notice about it in the ui
 172                         $time = wfTimestamp( TS_MW, $unix );
 173                 }
 174                 return $time;
 175         }
 176
 177         /**
 178          * Main entry point for action=protect and action=unprotect
 179          */
 180         function execute() {
 181                 if ( MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) === [ '' ] ) {
 182                         throw new ErrorPageError( 'protect-badnamespace-title', 'protect-badnamespace-text' );
 183                 }
 184
 185                 $out = $this->mContext->getOutput();
 186                 if ( !wfMessage( 'protect-dropdown' )->inContentLanguage()->isDisabled() ) {
 187                         $out->addModules( 'mediawiki.reasonSuggest' );
 188                         $out->addJsConfigVars( [
 189                                 'reasons' => 'protect-dropdown'
 190                         ] );
 191                 }
 192
 193                 if ( $this->mContext->getRequest()->wasPosted() ) {
 194                         if ( $this->save() ) {
 195                                 $q = $this->mArticle->isRedirect() ? 'redirect=no' : '';
 196                                 $out->redirect( $this->mTitle->getFullURL( $q ) );
 197                         }
 198                 } else {
 199                         $this->show();
 200                 }
 201         }
 202
 203         /**
 204          * Show the input form with optional error message
 205          *
 206          * @param string $err Error message or null if there's no error
 207          */
 208         function show( $err = null ) {
 209                 $out = $this->mContext->getOutput();
 210                 $out->setRobotPolicy( 'noindex,nofollow' );
 211                 $out->addBacklinkSubtitle( $this->mTitle );
 212
 213                 if ( is_array( $err ) ) {
 214                         $out->wrapWikiMsg( "<p class='error'>\n$1\n</p>\n", $err );
 215                 } elseif ( is_string( $err ) ) {
 216                         $out->addHTML( "<p class='error'>{$err}</p>\n" );
 217                 }
 218
 219                 if ( $this->mTitle->getRestrictionTypes() === [] ) {
 220                         // No restriction types available for the current title
 221                         // this might happen if an extension alters the available types
 222                         $out->setPageTitle( $this->mContext->msg(
 223                                 'protect-norestrictiontypes-title',
 224                                 $this->mTitle->getPrefixedText()
 225                         ) );
 226                         $out->addWikiText( $this->mContext->msg( 'protect-norestrictiontypes-text' )->plain() );
 227
 228                         // Show the log in case protection was possible once
 229                         $this->showLogExtract( $out );
 230                         // return as there isn't anything else we can do
 231                         return;
 232                 }
 233
 234                 list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
 235                 if ( $cascadeSources && count( $cascadeSources ) > 0 ) {
 236                         $titles = '';
 237
 238                         foreach ( $cascadeSources as $title ) {
 239                                 $titles .= '* [[:' . $title->getPrefixedText() . "]]\n";
 240                         }
 241
 242                         /** @todo FIXME: i18n issue, should use formatted number. */
 243                         $out->wrapWikiMsg(
 244                                 "<div id=\"mw-protect-cascadeon\">\n$1\n" . $titles . "</div>",
 245                                 [ 'protect-cascadeon', count( $cascadeSources ) ]
 246                         );
 247                 }
 248
 249                 # Show an appropriate message if the user isn't allowed or able to change
 250                 # the protection settings at this time
 251                 if ( $this->disabled ) {
 252                         $out->setPageTitle(
 253                                 $this->mContext->msg( 'protect-title-notallowed',
 254                                         $this->mTitle->getPrefixedText() )
 255                         );
 256                         $out->addWikiText( $out->formatPermissionsErrorMessage( $this->mPermErrors, 'protect' ) );
 257                 } else {
 258                         $out->setPageTitle( $this->mContext->msg( 'protect-title', $this->mTitle->getPrefixedText() ) );
 259                         $out->addWikiMsg( 'protect-text',
 260                                 wfEscapeWikiText( $this->mTitle->getPrefixedText() ) );
 261                 }
 262
 263                 $out->addHTML( $this->buildForm() );
 264                 $this->showLogExtract( $out );
 265         }
 266
 267         /**
 268          * Save submitted protection form
 269          *
 270          * @return bool Success
 271          */
 272         function save() {
 273                 # Permission check!
 274                 if ( $this->disabled ) {
 275                         $this->show();
 276                         return false;
 277                 }
 278
 279                 $request = $this->mContext->getRequest();
 280                 $user = $this->mContext->getUser();
 281                 $out = $this->mContext->getOutput();
 282                 $token = $request->getVal( 'wpEditToken' );
 283                 if ( !$user->matchEditToken( $token, [ 'protect', $this->mTitle->getPrefixedDBkey() ] ) ) {
 284                         $this->show( [ 'sessionfailure' ] );
 285                         return false;
 286                 }
 287
 288                 # Create reason string. Use list and/or custom string.
 289                 $reasonstr = $this->mReasonSelection;
 290                 if ( $reasonstr != 'other' && $this->mReason != '' ) {
 291                         // Entry from drop down menu + additional comment
 292                         $reasonstr .= $this->mContext->msg( 'colon-separator' )->text() . $this->mReason;
 293                 } elseif ( $reasonstr == 'other' ) {
 294                         $reasonstr = $this->mReason;
 295                 }
 296                 $expiry = [];
 297                 foreach ( $this->mApplicableTypes as $action ) {
 298                         $expiry[$action] = $this->getExpiry( $action );
 299                         if ( empty( $this->mRestrictions[$action] ) ) {
 300                                 continue; // unprotected
 301                         }
 302                         if ( !$expiry[$action] ) {
 303                                 $this->show( [ 'protect_expiry_invalid' ] );
 304                                 return false;
 305                         }
 306                         if ( $expiry[$action] < wfTimestampNow() ) {
 307                                 $this->show( [ 'protect_expiry_old' ] );
 308                                 return false;
 309                         }
 310                 }
 311
 312                 $this->mCascade = $request->getBool( 'mwProtect-cascade' );
 313
 314                 $status = $this->mArticle->doUpdateRestrictions(
 315                         $this->mRestrictions,
 316                         $expiry,
 317                         $this->mCascade,
 318                         $reasonstr,
 319                         $user
 320                 );
 321
 322                 if ( !$status->isOK() ) {
 323                         $this->show( $out->parseInline( $status->getWikiText() ) );
 324                         return false;
 325                 }
 326
 327                 /**
 328                  * Give extensions a change to handle added form items
 329                  *
 330                  * @since 1.19 you can (and you should) return false to abort saving;
 331                  *             you can also return an array of message name and its parameters
 332                  */
 333                 $errorMsg = '';
 334                 if ( !Hooks::run( 'ProtectionForm::save', [ $this->mArticle, &$errorMsg, $reasonstr ] ) ) {
 335                         if ( $errorMsg == '' ) {
 336                                 $errorMsg = [ 'hookaborted' ];
 337                         }
 338                 }
 339                 if ( $errorMsg != '' ) {
 340                         $this->show( $errorMsg );
 341                         return false;
 342                 }
 343
 344                 WatchAction::doWatchOrUnwatch( $request->getCheck( 'mwProtectWatch' ), $this->mTitle, $user );
 345
 346                 return true;
 347         }
 348
 349         /**
 350          * Build the input form
 351          *
 352          * @return string HTML form
 353          */
 354         function buildForm() {
 355                 $context = $this->mContext;
 356                 $user = $context->getUser();
 357                 $output = $context->getOutput();
 358                 $lang = $context->getLanguage();
 359                 $cascadingRestrictionLevels = $context->getConfig()->get( 'CascadingRestrictionLevels' );
 360                 $out = '';
 361                 if ( !$this->disabled ) {
 362                         $output->addModules( 'mediawiki.legacy.protect' );
 363                         $output->addJsConfigVars( 'wgCascadeableLevels', $cascadingRestrictionLevels );
 364                         $out .= Xml::openElement( 'form', [ 'method' => 'post',
 365                                 'action' => $this->mTitle->getLocalURL( 'action=protect' ),
 366                                 'id' => 'mw-Protect-Form' ] );
 367                 }
 368
 369                 $out .= Xml::openElement( 'fieldset' ) .
 370                         Xml::element( 'legend', null, $context->msg( 'protect-legend' )->text() ) .
 371                         Xml::openElement( 'table', [ 'id' => 'mwProtectSet' ] ) .
 372                         Xml::openElement( 'tbody' );
 373
 374                 $scExpiryOptions = wfMessage( 'protect-expiry-options' )->inContentLanguage()->text();
 375                 $showProtectOptions = $scExpiryOptions !== '-' && !$this->disabled;
 376
 377                 // Not all languages have V_x <-> N_x relation
 378                 foreach ( $this->mRestrictions as $action => $selected ) {
 379                         // Messages:
 380                         // restriction-edit, restriction-move, restriction-create, restriction-upload
 381                         $msg = $context->msg( 'restriction-' . $action );
 382                         $out .= "<tr><td>" .
 383                         Xml::openElement( 'fieldset' ) .
 384                         Xml::element( 'legend', null, $msg->exists() ? $msg->text() : $action ) .
 385                         Xml::openElement( 'table', [ 'id' => "mw-protect-table-$action" ] ) .
 386                                 "<tr><td>" . $this->buildSelector( $action, $selected ) . "</td></tr><tr><td>";
 387
 388                         $mProtectexpiry = Xml::label(
 389                                 $context->msg( 'protectexpiry' )->text(),
 390                                 "mwProtectExpirySelection-$action"
 391                         );
 392                         $mProtectother = Xml::label(
 393                                 $context->msg( 'protect-othertime' )->text(),
 394                                 "mwProtect-$action-expires"
 395                         );
 396
 397                         $expiryFormOptions = new XmlSelect(
 398                                 "wpProtectExpirySelection-$action",
 399                                 "mwProtectExpirySelection-$action",
 400                                 $this->mExpirySelection[$action]
 401                         );
 402                         $expiryFormOptions->setAttribute( 'tabindex', '2' );
 403                         if ( $this->disabled ) {
 404                                 $expiryFormOptions->setAttribute( 'disabled', 'disabled' );
 405                         }
 406
 407                         if ( $this->mExistingExpiry[$action] ) {
 408                                 if ( $this->mExistingExpiry[$action] == 'infinity' ) {
 409                                         $existingExpiryMessage = $context->msg( 'protect-existing-expiry-infinity' );
 410                                 } else {
 411                                         $timestamp = $lang->userTimeAndDate( $this->mExistingExpiry[$action], $user );
 412                                         $d = $lang->userDate( $this->mExistingExpiry[$action], $user );
 413                                         $t = $lang->userTime( $this->mExistingExpiry[$action], $user );
 414                                         $existingExpiryMessage = $context->msg(
 415                                                 'protect-existing-expiry',
 416                                                 $timestamp,
 417                                                 $d,
 418                                                 $t
 419                                         );
 420                                 }
 421                                 $expiryFormOptions->addOption( $existingExpiryMessage->text(), 'existing' );
 422                         }
 423
 424                         $expiryFormOptions->addOption(
 425                                 $context->msg( 'protect-othertime-op' )->text(),
 426                                 'othertime'
 427                         );
 428                         foreach ( explode( ',', $scExpiryOptions ) as $option ) {
 429                                 if ( strpos( $option, ":" ) === false ) {
 430                                         $show = $value = $option;
 431                                 } else {
 432                                         list( $show, $value ) = explode( ":", $option );
 433                                 }
 434                                 $expiryFormOptions->addOption( $show, htmlspecialchars( $value ) );
 435                         }
 436                         # Add expiry dropdown
 437                         if ( $showProtectOptions && !$this->disabled ) {
 438                                 $out .= "
 439                                         <table><tr>
 440                                                 <td class='mw-label'>
 441                                                         {$mProtectexpiry}
 442                                                 </td>
 443                                                 <td class='mw-input'>" .
 444                                                         $expiryFormOptions->getHTML() .
 445                                                 "</td>
 446                                         </tr></table>";
 447                         }
 448                         # Add custom expiry field
 449                         $attribs = [ 'id' => "mwProtect-$action-expires" ] + $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                 Hooks::run( 'ProtectionForm::buildForm', [ $this->mArticle, &$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', [ 'id' => 'mw-protect-table2' ] ) .
 471                                 Xml::openElement( 'tbody' );
 472                         $out .= '<tr>
 473                                         <td></td>
 474                                         <td class="mw-input">' .
 475                                                 Xml::checkLabel(
 476                                                         $context->msg( '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                         $mProtectreasonother = Xml::label(
 489                                 $context->msg( 'protectcomment' )->text(),
 490                                 'wpProtectReasonSelection'
 491                         );
 492
 493                         $mProtectreason = Xml::label(
 494                                 $context->msg( 'protect-otherreason' )->text(),
 495                                 'mwProtect-reason'
 496                         );
 497
 498                         $reasonDropDown = Xml::listDropDown( 'wpProtectReasonSelection',
 499                                 wfMessage( 'protect-dropdown' )->inContentLanguage()->text(),
 500                                 wfMessage( 'protect-otherreason-op' )->inContentLanguage()->text(),
 501                                 $this->mReasonSelection,
 502                                 'mwProtect-reason', 4 );
 503
 504                         $out .= Xml::openElement( 'table', [ 'id' => 'mw-protect-table3' ] ) .
 505                                 Xml::openElement( 'tbody' );
 506                         $out .= "
 507                                 <tr>
 508                                         <td class='mw-label'>
 509                                                 {$mProtectreasonother}
 510                                         </td>
 511                                         <td class='mw-input'>
 512                                                 {$reasonDropDown}
 513                                         </td>
 514                                 </tr>
 515                                 <tr>
 516                                         <td class='mw-label'>
 517                                                 {$mProtectreason}
 518                                         </td>
 519                                         <td class='mw-input'>" .
 520                                                 Xml::input( 'mwProtect-reason', 60, $this->mReason, [ 'type' => 'text',
 521                                                         'id' => 'mwProtect-reason', 'maxlength' => 180 ] ) .
 522                                                         // Limited maxlength as the database trims at 255 bytes and other texts
 523                                                         // chosen by dropdown menus on this page are also included in this database field.
 524                                                         // The byte limit of 180 bytes is enforced in javascript
 525                                         "</td>
 526                                 </tr>";
 527                         # Disallow watching is user is not logged in
 528                         if ( $user->isLoggedIn() ) {
 529                                 $out .= "
 530                                 <tr>
 531                                         <td></td>
 532                                         <td class='mw-input'>" .
 533                                                 Xml::checkLabel( $context->msg( 'watchthis' )->text(),
 534                                                         'mwProtectWatch', 'mwProtectWatch',
 535                                                         $user->isWatched( $this->mTitle ) || $user->getOption( 'watchdefault' ) ) .
 536                                         "</td>
 537                                 </tr>";
 538                         }
 539                         $out .= "
 540                                 <tr>
 541                                         <td></td>
 542                                         <td class='mw-submit'>" .
 543                                                 Xml::submitButton(
 544                                                         $context->msg( 'confirm' )->text(),
 545                                                         [ 'id' => 'mw-Protect-submit' ]
 546                                                 ) .
 547                                         "</td>
 548                                 </tr>\n";
 549                         $out .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
 550                 }
 551                 $out .= Xml::closeElement( 'fieldset' );
 552
 553                 if ( $user->isAllowed( 'editinterface' ) ) {
 554                         $link = Linker::linkKnown(
 555                                 $context->msg( 'protect-dropdown' )->inContentLanguage()->getTitle(),
 556                                 $context->msg( 'protect-edit-reasonlist' )->escaped(),
 557                                 [],
 558                                 [ 'action' => 'edit' ]
 559                         );
 560                         $out .= '<p class="mw-protect-editreasons">' . $link . '</p>';
 561                 }
 562
 563                 if ( !$this->disabled ) {
 564                         $out .= Html::hidden(
 565                                 'wpEditToken',
 566                                 $user->getEditToken( [ 'protect', $this->mTitle->getPrefixedDBkey() ] )
 567                         );
 568                         $out .= Xml::closeElement( 'form' );
 569                 }
 570
 571                 return $out;
 572         }
 573
 574         /**
 575          * Build protection level selector
 576          *
 577          * @param string $action Action to protect
 578          * @param string $selected Current protection level
 579          * @return string HTML fragment
 580          */
 581         function buildSelector( $action, $selected ) {
 582                 // If the form is disabled, display all relevant levels. Otherwise,
 583                 // just show the ones this user can use.
 584                 $levels = MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace(),
 585                         $this->disabled ? null : $this->mContext->getUser()
 586                 );
 587
 588                 $id = 'mwProtect-level-' . $action;
 589
 590                 $select = new XmlSelect( $id, $id, $selected );
 591                 $select->setAttribute( 'size', count( $levels ) );
 592                 if ( $this->disabled ) {
 593                         $select->setAttribute( 'disabled', 'disabled' );
 594                 }
 595
 596                 foreach ( $levels as $key ) {
 597                         $select->addOption( $this->getOptionLabel( $key ), $key );
 598                 }
 599
 600                 return $select->getHTML();
 601         }
 602
 603         /**
 604          * Prepare the label for a protection selector option
 605          *
 606          * @param string $permission Permission required
 607          * @return string
 608          */
 609         private function getOptionLabel( $permission ) {
 610                 if ( $permission == '' ) {
 611                         return $this->mContext->msg( 'protect-default' )->text();
 612                 } else {
 613                         // Messages: protect-level-autoconfirmed, protect-level-sysop
 614                         $msg = $this->mContext->msg( "protect-level-{$permission}" );
 615                         if ( $msg->exists() ) {
 616                                 return $msg->text();
 617                         }
 618                         return $this->mContext->msg( 'protect-fallback', $permission )->text();
 619                 }
 620         }
 621
 622         /**
 623          * Show protection long extracts for this page
 624          *
 625          * @param OutputPage $out
 626          * @access private
 627          */
 628         function showLogExtract( &$out ) {
 629                 # Show relevant lines from the protection log:
 630                 $protectLogPage = new LogPage( 'protect' );
 631                 $out->addHTML( Xml::element( 'h2', null, $protectLogPage->getName()->text() ) );
 632                 LogEventsList::showLogExtract( $out, 'protect', $this->mTitle );
 633                 # Let extensions add other relevant log extracts
 634                 Hooks::run( 'ProtectionForm::showLogExtract', [ $this->mArticle, $out ] );
 635         }
 636 }