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         /** @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', $this->mContext->getUser()
  74                 );
  75                 if ( wfReadOnly() ) {
  76                         $this->mPermErrors[] = array( 'readonlytext', wfReadOnlyReason() );
  77                 }
  78                 $this->disabled = $this->mPermErrors != array();
  79                 $this->disabledAttrib = $this->disabled
  80                         ? array( 'disabled' => 'disabled' )
  81                         : array();
  82
  83                 $this->loadData();
  84         }
  85
  86         /**
  87          * Loads the current state of protection into the object.
  88          */
  89         function loadData() {
  90                 $levels = MWNamespace::getRestrictionLevels(
  91                         $this->mTitle->getNamespace(), $this->mContext->getUser()
  92                 );
  93                 $this->mCascade = $this->mTitle->areRestrictionsCascading();
  94
  95                 $request = $this->mContext->getRequest();
  96                 $this->mReason = $request->getText( 'mwProtect-reason' );
  97                 $this->mReasonSelection = $request->getText( 'wpProtectReasonSelection' );
  98                 $this->mCascade = $request->getBool( 'mwProtect-cascade', $this->mCascade );
  99
 100                 foreach ( $this->mApplicableTypes as $action ) {
 101                         // @todo FIXME: This form currently requires individual selections,
 102                         // but the db allows multiples separated by commas.
 103
 104                         // Pull the actual restriction from the DB
 105                         $this->mRestrictions[$action] = implode( '', $this->mTitle->getRestrictions( $action ) );
 106
 107                         if ( !$this->mRestrictions[$action] ) {
 108                                 // No existing expiry
 109                                 $existingExpiry = '';
 110                         } else {
 111                                 $existingExpiry = $this->mTitle->getRestrictionExpiry( $action );
 112                         }
 113                         $this->mExistingExpiry[$action] = $existingExpiry;
 114
 115                         $requestExpiry = $request->getText( "mwProtect-expiry-$action" );
 116                         $requestExpirySelection = $request->getVal( "wpProtectExpirySelection-$action" );
 117
 118                         if ( $requestExpiry ) {
 119                                 // Custom expiry takes precedence
 120                                 $this->mExpiry[$action] = $requestExpiry;
 121                                 $this->mExpirySelection[$action] = 'othertime';
 122                         } elseif ( $requestExpirySelection ) {
 123                                 // Expiry selected from list
 124                                 $this->mExpiry[$action] = '';
 125                                 $this->mExpirySelection[$action] = $requestExpirySelection;
 126                         } elseif ( $existingExpiry ) {
 127                                 // Use existing expiry in its own list item
 128                                 $this->mExpiry[$action] = '';
 129                                 $this->mExpirySelection[$action] = $existingExpiry;
 130                         } else {
 131                                 // Catches 'infinity' - Existing expiry is infinite, use "infinite" in drop-down
 132                                 // Final default: infinite
 133                                 $this->mExpiry[$action] = '';
 134                                 $this->mExpirySelection[$action] = 'infinite';
 135                         }
 136
 137                         $val = $request->getVal( "mwProtect-level-$action" );
 138                         if ( isset( $val ) && in_array( $val, $levels ) ) {
 139                                 $this->mRestrictions[$action] = $val;
 140                         }
 141                 }
 142         }
 143
 144         /**
 145          * Get the expiry time for a given action, by combining the relevant inputs.
 146          *
 147          * @param string $action
 148          *
 149          * @return string 14-char timestamp or "infinity", or false if the input was invalid
 150          */
 151         function getExpiry( $action ) {
 152                 if ( $this->mExpirySelection[$action] == 'existing' ) {
 153                         return $this->mExistingExpiry[$action];
 154                 } elseif ( $this->mExpirySelection[$action] == 'othertime' ) {
 155                         $value = $this->mExpiry[$action];
 156                 } else {
 157                         $value = $this->mExpirySelection[$action];
 158                 }
 159                 if ( $value == 'infinite' || $value == 'indefinite' || $value == 'infinity' ) {
 160                         $time = wfGetDB( DB_SLAVE )->getInfinity();
 161                 } else {
 162                         $unix = strtotime( $value );
 163
 164                         if ( !$unix || $unix === -1 ) {
 165                                 return false;
 166                         }
 167
 168                         // @todo FIXME: Non-qualified absolute times are not in users specified timezone
 169                         // and there isn't notice about it in the ui
 170                         $time = wfTimestamp( TS_MW, $unix );
 171                 }
 172                 return $time;
 173         }
 174
 175         /**
 176          * Main entry point for action=protect and action=unprotect
 177          */
 178         function execute() {
 179                 if ( MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) === array( '' ) ) {
 180                         throw new ErrorPageError( 'protect-badnamespace-title', 'protect-badnamespace-text' );
 181                 }
 182
 183                 if ( $this->mContext->getRequest()->wasPosted() ) {
 184                         if ( $this->save() ) {
 185                                 $q = $this->mArticle->isRedirect() ? 'redirect=no' : '';
 186                                 $this->mContext->getOutput()->redirect( $this->mTitle->getFullURL( $q ) );
 187                         }
 188                 } else {
 189                         $this->show();
 190                 }
 191         }
 192
 193         /**
 194          * Show the input form with optional error message
 195          *
 196          * @param string $err Error message or null if there's no error
 197          */
 198         function show( $err = null ) {
 199                 $out = $this->mContext->getOutput();
 200                 $out->setRobotPolicy( 'noindex,nofollow' );
 201                 $out->addBacklinkSubtitle( $this->mTitle );
 202
 203                 if ( is_array( $err ) ) {
 204                         $out->wrapWikiMsg( "<p class='error'>\n$1\n</p>\n", $err );
 205                 } elseif ( is_string( $err ) ) {
 206                         $out->addHTML( "<p class='error'>{$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                         $out->setPageTitle( wfMessage(
 213                                 'protect-norestrictiontypes-title',
 214                                 $this->mTitle->getPrefixedText()
 215                         ) );
 216                         $out->addWikiText( wfMessage( 'protect-norestrictiontypes-text' )->text() );
 217
 218                         // Show the log in case protection was possible once
 219                         $this->showLogExtract( $out );
 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                         $out->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                         $out->setPageTitle(
 243                                 wfMessage( 'protect-title-notallowed',
 244                                         $this->mTitle->getPrefixedText() )
 245                         );
 246                         $out->addWikiText( $out->formatPermissionsErrorMessage( $this->mPermErrors, 'protect' ) );
 247                 } else {
 248                         $out->setPageTitle( wfMessage( 'protect-title', $this->mTitle->getPrefixedText() ) );
 249                         $out->addWikiMsg( 'protect-text',
 250                                 wfEscapeWikiText( $this->mTitle->getPrefixedText() ) );
 251                 }
 252
 253                 $out->addHTML( $this->buildForm() );
 254                 $this->showLogExtract( $out );
 255         }
 256
 257         /**
 258          * Save submitted protection form
 259          *
 260          * @return bool Success
 261          */
 262         function save() {
 263                 # Permission check!
 264                 if ( $this->disabled ) {
 265                         $this->show();
 266                         return false;
 267                 }
 268
 269                 $request = $this->mContext->getRequest();
 270                 $user = $this->mContext->getUser();
 271                 $out = $this->mContext->getOutput();
 272                 $token = $request->getVal( 'wpEditToken' );
 273                 if ( !$user->matchEditToken( $token, array( 'protect', $this->mTitle->getPrefixedDBkey() ) ) ) {
 274                         $this->show( array( 'sessionfailure' ) );
 275                         return false;
 276                 }
 277
 278                 # Create reason string. Use list and/or custom string.
 279                 $reasonstr = $this->mReasonSelection;
 280                 if ( $reasonstr != 'other' && $this->mReason != '' ) {
 281                         // Entry from drop down menu + additional comment
 282                         $reasonstr .= wfMessage( 'colon-separator' )->text() . $this->mReason;
 283                 } elseif ( $reasonstr == 'other' ) {
 284                         $reasonstr = $this->mReason;
 285                 }
 286                 $expiry = array();
 287                 foreach ( $this->mApplicableTypes as $action ) {
 288                         $expiry[$action] = $this->getExpiry( $action );
 289                         if ( empty( $this->mRestrictions[$action] ) ) {
 290                                 continue; // unprotected
 291                         }
 292                         if ( !$expiry[$action] ) {
 293                                 $this->show( array( 'protect_expiry_invalid' ) );
 294                                 return false;
 295                         }
 296                         if ( $expiry[$action] < wfTimestampNow() ) {
 297                                 $this->show( array( 'protect_expiry_old' ) );
 298                                 return false;
 299                         }
 300                 }
 301
 302                 $this->mCascade = $request->getBool( 'mwProtect-cascade' );
 303
 304                 $status = $this->mArticle->doUpdateRestrictions(
 305                         $this->mRestrictions,
 306                         $expiry,
 307                         $this->mCascade,
 308                         $reasonstr,
 309                         $user
 310                 );
 311
 312                 if ( !$status->isOK() ) {
 313                         $this->show( $out->parseInline( $status->getWikiText() ) );
 314                         return false;
 315                 }
 316
 317                 /**
 318                  * Give extensions a change to handle added form items
 319                  *
 320                  * @since 1.19 you can (and you should) return false to abort saving;
 321                  *             you can also return an array of message name and its parameters
 322                  */
 323                 $errorMsg = '';
 324                 if ( !Hooks::run( 'ProtectionForm::save', array( $this->mArticle, &$errorMsg, $reasonstr ) ) ) {
 325                         if ( $errorMsg == '' ) {
 326                                 $errorMsg = array( 'hookaborted' );
 327                         }
 328                 }
 329                 if ( $errorMsg != '' ) {
 330                         $this->show( $errorMsg );
 331                         return false;
 332                 }
 333
 334                 WatchAction::doWatchOrUnwatch( $request->getCheck( 'mwProtectWatch' ), $this->mTitle, $user );
 335
 336                 return true;
 337         }
 338
 339         /**
 340          * Build the input form
 341          *
 342          * @return string HTML form
 343          */
 344         function buildForm() {
 345                 $user = $this->mContext->getUser();
 346                 $output = $this->mContext->getOutput();
 347                 $lang = $this->mContext->getLanguage();
 348                 $cascadingRestrictionLevels = $this->mContext->getConfig()->get( 'CascadingRestrictionLevels' );
 349                 $out = '';
 350                 if ( !$this->disabled ) {
 351                         $output->addModules( 'mediawiki.legacy.protect' );
 352                         $output->addJsConfigVars( 'wgCascadeableLevels', $cascadingRestrictionLevels );
 353                         $out .= Xml::openElement( 'form', array( 'method' => 'post',
 354                                 'action' => $this->mTitle->getLocalURL( 'action=protect' ),
 355                                 'id' => 'mw-Protect-Form' ) );
 356                 }
 357
 358                 $out .= Xml::openElement( 'fieldset' ) .
 359                         Xml::element( 'legend', null, wfMessage( 'protect-legend' )->text() ) .
 360                         Xml::openElement( 'table', array( 'id' => 'mwProtectSet' ) ) .
 361                         Xml::openElement( 'tbody' );
 362
 363                 $scExpiryOptions = wfMessage( 'protect-expiry-options' )->inContentLanguage()->text();
 364                 $showProtectOptions = $scExpiryOptions !== '-' && !$this->disabled;
 365
 366                 // Not all languages have V_x <-> N_x relation
 367                 foreach ( $this->mRestrictions as $action => $selected ) {
 368                         // Messages:
 369                         // restriction-edit, restriction-move, restriction-create, restriction-upload
 370                         $msg = wfMessage( 'restriction-' . $action );
 371                         $out .= "<tr><td>" .
 372                         Xml::openElement( 'fieldset' ) .
 373                         Xml::element( 'legend', null, $msg->exists() ? $msg->text() : $action ) .
 374                         Xml::openElement( 'table', array( 'id' => "mw-protect-table-$action" ) ) .
 375                                 "<tr><td>" . $this->buildSelector( $action, $selected ) . "</td></tr><tr><td>";
 376
 377                         $mProtectexpiry = Xml::label(
 378                                 wfMessage( 'protectexpiry' )->text(),
 379                                 "mwProtectExpirySelection-$action"
 380                         );
 381                         $mProtectother = Xml::label(
 382                                 wfMessage( 'protect-othertime' )->text(),
 383                                 "mwProtect-$action-expires"
 384                         );
 385
 386                         $expiryFormOptions = '';
 387                         if ( $this->mExistingExpiry[$action] ) {
 388                                 if ( $this->mExistingExpiry[$action] == 'infinity' ) {
 389                                         $existingExpiryMessage = wfMessage( 'protect-existing-expiry-infinity' );
 390                                 } else {
 391                                         $timestamp = $lang->timeanddate( $this->mExistingExpiry[$action], true );
 392                                         $d = $lang->date( $this->mExistingExpiry[$action], true );
 393                                         $t = $lang->time( $this->mExistingExpiry[$action], true );
 394                                         $existingExpiryMessage = wfMessage( 'protect-existing-expiry', $timestamp, $d, $t );
 395                                 }
 396                                 $expiryFormOptions .=
 397                                         Xml::option(
 398                                                 $existingExpiryMessage->text(),
 399                                                 'existing',
 400                                                 $this->mExpirySelection[$action] == 'existing'
 401                                         ) . "\n";
 402                         }
 403
 404                         $expiryFormOptions .= Xml::option(
 405                                 wfMessage( 'protect-othertime-op' )->text(),
 406                                 "othertime"
 407                         ) . "\n";
 408                         foreach ( explode( ',', $scExpiryOptions ) as $option ) {
 409                                 if ( strpos( $option, ":" ) === false ) {
 410                                         $show = $value = $option;
 411                                 } else {
 412                                         list( $show, $value ) = explode( ":", $option );
 413                                 }
 414                                 $show = htmlspecialchars( $show );
 415                                 $value = htmlspecialchars( $value );
 416                                 $expiryFormOptions .= Xml::option(
 417                                         $show,
 418                                         $value,
 419                                         $this->mExpirySelection[$action] === $value
 420                                 ) . "\n";
 421                         }
 422                         # Add expiry dropdown
 423                         if ( $showProtectOptions && !$this->disabled ) {
 424                                 $out .= "
 425                                         <table><tr>
 426                                                 <td class='mw-label'>
 427                                                         {$mProtectexpiry}
 428                                                 </td>
 429                                                 <td class='mw-input'>" .
 430                                                         Xml::tags( 'select',
 431                                                                 array(
 432                                                                         'id' => "mwProtectExpirySelection-$action",
 433                                                                         'name' => "wpProtectExpirySelection-$action",
 434                                                                         'tabindex' => '2' ) + $this->disabledAttrib,
 435                                                                 $expiryFormOptions ) .
 436                                                 "</td>
 437                                         </tr></table>";
 438                         }
 439                         # Add custom expiry field
 440                         $attribs = array( 'id' => "mwProtect-$action-expires" ) + $this->disabledAttrib;
 441                         $out .= "<table><tr>
 442                                         <td class='mw-label'>" .
 443                                                 $mProtectother .
 444                                         '</td>
 445                                         <td class="mw-input">' .
 446                                                 Xml::input( "mwProtect-expiry-$action", 50, $this->mExpiry[$action], $attribs ) .
 447                                         '</td>
 448                                 </tr></table>';
 449                         $out .= "</td></tr>" .
 450                         Xml::closeElement( 'table' ) .
 451                         Xml::closeElement( 'fieldset' ) .
 452                         "</td></tr>";
 453                 }
 454                 # Give extensions a chance to add items to the form
 455                 Hooks::run( 'ProtectionForm::buildForm', array( $this->mArticle, &$out ) );
 456
 457                 $out .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
 458
 459                 // JavaScript will add another row with a value-chaining checkbox
 460                 if ( $this->mTitle->exists() ) {
 461                         $out .= Xml::openElement( 'table', array( 'id' => 'mw-protect-table2' ) ) .
 462                                 Xml::openElement( 'tbody' );
 463                         $out .= '<tr>
 464                                         <td></td>
 465                                         <td class="mw-input">' .
 466                                                 Xml::checkLabel(
 467                                                         wfMessage( 'protect-cascade' )->text(),
 468                                                         'mwProtect-cascade',
 469                                                         'mwProtect-cascade',
 470                                                         $this->mCascade, $this->disabledAttrib
 471                                                 ) .
 472                                         "</td>
 473                                 </tr>\n";
 474                         $out .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
 475                 }
 476
 477                 # Add manual and custom reason field/selects as well as submit
 478                 if ( !$this->disabled ) {
 479                         $mProtectreasonother = Xml::label(
 480                                 wfMessage( 'protectcomment' )->text(),
 481                                 'wpProtectReasonSelection'
 482                         );
 483
 484                         $mProtectreason = Xml::label(
 485                                 wfMessage( 'protect-otherreason' )->text(),
 486                                 'mwProtect-reason'
 487                         );
 488
 489                         $reasonDropDown = Xml::listDropDown( 'wpProtectReasonSelection',
 490                                 wfMessage( 'protect-dropdown' )->inContentLanguage()->text(),
 491                                 wfMessage( 'protect-otherreason-op' )->inContentLanguage()->text(),
 492                                 $this->mReasonSelection,
 493                                 'mwProtect-reason', 4 );
 494
 495                         $out .= Xml::openElement( 'table', array( 'id' => 'mw-protect-table3' ) ) .
 496                                 Xml::openElement( 'tbody' );
 497                         $out .= "
 498                                 <tr>
 499                                         <td class='mw-label'>
 500                                                 {$mProtectreasonother}
 501                                         </td>
 502                                         <td class='mw-input'>
 503                                                 {$reasonDropDown}
 504                                         </td>
 505                                 </tr>
 506                                 <tr>
 507                                         <td class='mw-label'>
 508                                                 {$mProtectreason}
 509                                         </td>
 510                                         <td class='mw-input'>" .
 511                                                 Xml::input( 'mwProtect-reason', 60, $this->mReason, array( 'type' => 'text',
 512                                                         'id' => 'mwProtect-reason', 'maxlength' => 180 ) ) .
 513                                                         // Limited maxlength as the database trims at 255 bytes and other texts
 514                                                         // chosen by dropdown menus on this page are also included in this database field.
 515                                                         // The byte limit of 180 bytes is enforced in javascript
 516                                         "</td>
 517                                 </tr>";
 518                         # Disallow watching is user is not logged in
 519                         if ( $user->isLoggedIn() ) {
 520                                 $out .= "
 521                                 <tr>
 522                                         <td></td>
 523                                         <td class='mw-input'>" .
 524                                                 Xml::checkLabel( wfMessage( 'watchthis' )->text(),
 525                                                         'mwProtectWatch', 'mwProtectWatch',
 526                                                         $user->isWatched( $this->mTitle ) || $user->getOption( 'watchdefault' ) ) .
 527                                         "</td>
 528                                 </tr>";
 529                         }
 530                         $out .= "
 531                                 <tr>
 532                                         <td></td>
 533                                         <td class='mw-submit'>" .
 534                                                 Xml::submitButton(
 535                                                         wfMessage( 'confirm' )->text(),
 536                                                         array( 'id' => 'mw-Protect-submit' )
 537                                                 ) .
 538                                         "</td>
 539                                 </tr>\n";
 540                         $out .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
 541                 }
 542                 $out .= Xml::closeElement( 'fieldset' );
 543
 544                 if ( $user->isAllowed( 'editinterface' ) ) {
 545                         $title = Title::makeTitle( NS_MEDIAWIKI, 'Protect-dropdown' );
 546                         $link = Linker::link(
 547                                 $title,
 548                                 wfMessage( 'protect-edit-reasonlist' )->escaped(),
 549                                 array(),
 550                                 array( 'action' => 'edit' )
 551                         );
 552                         $out .= '<p class="mw-protect-editreasons">' . $link . '</p>';
 553                 }
 554
 555                 if ( !$this->disabled ) {
 556                         $out .= Html::hidden(
 557                                 'wpEditToken',
 558                                 $user->getEditToken( array( 'protect', $this->mTitle->getPrefixedDBkey() ) )
 559                         );
 560                         $out .= Xml::closeElement( 'form' );
 561                 }
 562
 563                 return $out;
 564         }
 565
 566         /**
 567          * Build protection level selector
 568          *
 569          * @param string $action Action to protect
 570          * @param string $selected Current protection level
 571          * @return string HTML fragment
 572          */
 573         function buildSelector( $action, $selected ) {
 574                 // If the form is disabled, display all relevant levels. Otherwise,
 575                 // just show the ones this user can use.
 576                 $levels = MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace(),
 577                         $this->disabled ? null : $this->mContext->getUser()
 578                 );
 579
 580                 $id = 'mwProtect-level-' . $action;
 581                 $attribs = array(
 582                         'id' => $id,
 583                         'name' => $id,
 584                         'size' => count( $levels ),
 585                 ) + $this->disabledAttrib;
 586
 587                 $out = Xml::openElement( 'select', $attribs );
 588                 foreach ( $levels as $key ) {
 589                         $out .= Xml::option( $this->getOptionLabel( $key ), $key, $key == $selected );
 590                 }
 591                 $out .= Xml::closeElement( 'select' );
 592                 return $out;
 593         }
 594
 595         /**
 596          * Prepare the label for a protection selector option
 597          *
 598          * @param string $permission Permission required
 599          * @return string
 600          */
 601         private function getOptionLabel( $permission ) {
 602                 if ( $permission == '' ) {
 603                         return wfMessage( 'protect-default' )->text();
 604                 } else {
 605                         // Messages: protect-level-autoconfirmed, protect-level-sysop
 606                         $msg = wfMessage( "protect-level-{$permission}" );
 607                         if ( $msg->exists() ) {
 608                                 return $msg->text();
 609                         }
 610                         return wfMessage( 'protect-fallback', $permission )->text();
 611                 }
 612         }
 613
 614         /**
 615          * Show protection long extracts for this page
 616          *
 617          * @param OutputPage $out
 618          * @access private
 619          */
 620         function showLogExtract( &$out ) {
 621                 # Show relevant lines from the protection log:
 622                 $protectLogPage = new LogPage( 'protect' );
 623                 $out->addHTML( Xml::element( 'h2', null, $protectLogPage->getName()->text() ) );
 624                 LogEventsList::showLogExtract( $out, 'protect', $this->mTitle );
 625                 # Let extensions add other relevant log extracts
 626                 Hooks::run( 'ProtectionForm::showLogExtract', array( $this->mArticle, $out ) );
 627         }
 628 }