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                         $reasonsList = Xml::getArrayFromWikiTextList(
 188                                 wfMessage( 'protect-dropdown' )->inContentLanguage()->text()
 189                         );
 190                         $out->addModules( 'mediawiki.reasonSuggest' );
 191                         $out->addJsConfigVars( [
 192                                 'reasons' => $reasonsList
 193                         ] );
 194                 }
 195
 196                 if ( $this->mContext->getRequest()->wasPosted() ) {
 197                         if ( $this->save() ) {
 198                                 $q = $this->mArticle->isRedirect() ? 'redirect=no' : '';
 199                                 $out->redirect( $this->mTitle->getFullURL( $q ) );
 200                         }
 201                 } else {
 202                         $this->show();
 203                 }
 204         }
 205
 206         /**
 207          * Show the input form with optional error message
 208          *
 209          * @param string $err Error message or null if there's no error
 210          */
 211         function show( $err = null ) {
 212                 $out = $this->mContext->getOutput();
 213                 $out->setRobotPolicy( 'noindex,nofollow' );
 214                 $out->addBacklinkSubtitle( $this->mTitle );
 215
 216                 if ( is_array( $err ) ) {
 217                         $out->wrapWikiMsg( "<p class='error'>\n$1\n</p>\n", $err );
 218                 } elseif ( is_string( $err ) ) {
 219                         $out->addHTML( "<p class='error'>{$err}</p>\n" );
 220                 }
 221
 222                 if ( $this->mTitle->getRestrictionTypes() === [] ) {
 223                         // No restriction types available for the current title
 224                         // this might happen if an extension alters the available types
 225                         $out->setPageTitle( $this->mContext->msg(
 226                                 'protect-norestrictiontypes-title',
 227                                 $this->mTitle->getPrefixedText()
 228                         ) );
 229                         $out->addWikiText( $this->mContext->msg( 'protect-norestrictiontypes-text' )->plain() );
 230
 231                         // Show the log in case protection was possible once
 232                         $this->showLogExtract( $out );
 233                         // return as there isn't anything else we can do
 234                         return;
 235                 }
 236
 237                 list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
 238                 if ( $cascadeSources && count( $cascadeSources ) > 0 ) {
 239                         $titles = '';
 240
 241                         foreach ( $cascadeSources as $title ) {
 242                                 $titles .= '* [[:' . $title->getPrefixedText() . "]]\n";
 243                         }
 244
 245                         /** @todo FIXME: i18n issue, should use formatted number. */
 246                         $out->wrapWikiMsg(
 247                                 "<div id=\"mw-protect-cascadeon\">\n$1\n" . $titles . "</div>",
 248                                 [ 'protect-cascadeon', count( $cascadeSources ) ]
 249                         );
 250                 }
 251
 252                 # Show an appropriate message if the user isn't allowed or able to change
 253                 # the protection settings at this time
 254                 if ( $this->disabled ) {
 255                         $out->setPageTitle(
 256                                 $this->mContext->msg( 'protect-title-notallowed',
 257                                         $this->mTitle->getPrefixedText() )
 258                         );
 259                         $out->addWikiText( $out->formatPermissionsErrorMessage( $this->mPermErrors, 'protect' ) );
 260                 } else {
 261                         $out->setPageTitle( $this->mContext->msg( 'protect-title', $this->mTitle->getPrefixedText() ) );
 262                         $out->addWikiMsg( 'protect-text',
 263                                 wfEscapeWikiText( $this->mTitle->getPrefixedText() ) );
 264                 }
 265
 266                 $out->addHTML( $this->buildForm() );
 267                 $this->showLogExtract( $out );
 268         }
 269
 270         /**
 271          * Save submitted protection form
 272          *
 273          * @return bool Success
 274          */
 275         function save() {
 276                 # Permission check!
 277                 if ( $this->disabled ) {
 278                         $this->show();
 279                         return false;
 280                 }
 281
 282                 $request = $this->mContext->getRequest();
 283                 $user = $this->mContext->getUser();
 284                 $out = $this->mContext->getOutput();
 285                 $token = $request->getVal( 'wpEditToken' );
 286                 if ( !$user->matchEditToken( $token, [ 'protect', $this->mTitle->getPrefixedDBkey() ] ) ) {
 287                         $this->show( [ 'sessionfailure' ] );
 288                         return false;
 289                 }
 290
 291                 # Create reason string. Use list and/or custom string.
 292                 $reasonstr = $this->mReasonSelection;
 293                 if ( $reasonstr != 'other' && $this->mReason != '' ) {
 294                         // Entry from drop down menu + additional comment
 295                         $reasonstr .= $this->mContext->msg( 'colon-separator' )->text() . $this->mReason;
 296                 } elseif ( $reasonstr == 'other' ) {
 297                         $reasonstr = $this->mReason;
 298                 }
 299                 $expiry = [];
 300                 foreach ( $this->mApplicableTypes as $action ) {
 301                         $expiry[$action] = $this->getExpiry( $action );
 302                         if ( empty( $this->mRestrictions[$action] ) ) {
 303                                 continue; // unprotected
 304                         }
 305                         if ( !$expiry[$action] ) {
 306                                 $this->show( [ 'protect_expiry_invalid' ] );
 307                                 return false;
 308                         }
 309                         if ( $expiry[$action] < wfTimestampNow() ) {
 310                                 $this->show( [ 'protect_expiry_old' ] );
 311                                 return false;
 312                         }
 313                 }
 314
 315                 $this->mCascade = $request->getBool( 'mwProtect-cascade' );
 316
 317                 $status = $this->mArticle->doUpdateRestrictions(
 318                         $this->mRestrictions,
 319                         $expiry,
 320                         $this->mCascade,
 321                         $reasonstr,
 322                         $user
 323                 );
 324
 325                 if ( !$status->isOK() ) {
 326                         $this->show( $out->parseInline( $status->getWikiText() ) );
 327                         return false;
 328                 }
 329
 330                 /**
 331                  * Give extensions a change to handle added form items
 332                  *
 333                  * @since 1.19 you can (and you should) return false to abort saving;
 334                  *             you can also return an array of message name and its parameters
 335                  */
 336                 $errorMsg = '';
 337                 if ( !Hooks::run( 'ProtectionForm::save', [ $this->mArticle, &$errorMsg, $reasonstr ] ) ) {
 338                         if ( $errorMsg == '' ) {
 339                                 $errorMsg = [ 'hookaborted' ];
 340                         }
 341                 }
 342                 if ( $errorMsg != '' ) {
 343                         $this->show( $errorMsg );
 344                         return false;
 345                 }
 346
 347                 WatchAction::doWatchOrUnwatch( $request->getCheck( 'mwProtectWatch' ), $this->mTitle, $user );
 348
 349                 return true;
 350         }
 351
 352         /**
 353          * Build the input form
 354          *
 355          * @return string HTML form
 356          */
 357         function buildForm() {
 358                 $context = $this->mContext;
 359                 $user = $context->getUser();
 360                 $output = $context->getOutput();
 361                 $lang = $context->getLanguage();
 362                 $cascadingRestrictionLevels = $context->getConfig()->get( 'CascadingRestrictionLevels' );
 363                 $out = '';
 364                 if ( !$this->disabled ) {
 365                         $output->addModules( 'mediawiki.legacy.protect' );
 366                         $output->addJsConfigVars( 'wgCascadeableLevels', $cascadingRestrictionLevels );
 367                         $out .= Xml::openElement( 'form', [ 'method' => 'post',
 368                                 'action' => $this->mTitle->getLocalURL( 'action=protect' ),
 369                                 'id' => 'mw-Protect-Form' ] );
 370                 }
 371
 372                 $out .= Xml::openElement( 'fieldset' ) .
 373                         Xml::element( 'legend', null, $context->msg( 'protect-legend' )->text() ) .
 374                         Xml::openElement( 'table', [ 'id' => 'mwProtectSet' ] ) .
 375                         Xml::openElement( 'tbody' );
 376
 377                 $scExpiryOptions = wfMessage( 'protect-expiry-options' )->inContentLanguage()->text();
 378                 $showProtectOptions = $scExpiryOptions !== '-' && !$this->disabled;
 379
 380                 // Not all languages have V_x <-> N_x relation
 381                 foreach ( $this->mRestrictions as $action => $selected ) {
 382                         // Messages:
 383                         // restriction-edit, restriction-move, restriction-create, restriction-upload
 384                         $msg = $context->msg( 'restriction-' . $action );
 385                         $out .= "<tr><td>" .
 386                         Xml::openElement( 'fieldset' ) .
 387                         Xml::element( 'legend', null, $msg->exists() ? $msg->text() : $action ) .
 388                         Xml::openElement( 'table', [ 'id' => "mw-protect-table-$action" ] ) .
 389                                 "<tr><td>" . $this->buildSelector( $action, $selected ) . "</td></tr><tr><td>";
 390
 391                         $mProtectexpiry = Xml::label(
 392                                 $context->msg( 'protectexpiry' )->text(),
 393                                 "mwProtectExpirySelection-$action"
 394                         );
 395                         $mProtectother = Xml::label(
 396                                 $context->msg( 'protect-othertime' )->text(),
 397                                 "mwProtect-$action-expires"
 398                         );
 399
 400                         $expiryFormOptions = new XmlSelect(
 401                                 "wpProtectExpirySelection-$action",
 402                                 "mwProtectExpirySelection-$action",
 403                                 $this->mExpirySelection[$action]
 404                         );
 405                         $expiryFormOptions->setAttribute( 'tabindex', '2' );
 406                         if ( $this->disabled ) {
 407                                 $expiryFormOptions->setAttribute( 'disabled', 'disabled' );
 408                         }
 409
 410                         if ( $this->mExistingExpiry[$action] ) {
 411                                 if ( $this->mExistingExpiry[$action] == 'infinity' ) {
 412                                         $existingExpiryMessage = $context->msg( 'protect-existing-expiry-infinity' );
 413                                 } else {
 414                                         $timestamp = $lang->userTimeAndDate( $this->mExistingExpiry[$action], $user );
 415                                         $d = $lang->userDate( $this->mExistingExpiry[$action], $user );
 416                                         $t = $lang->userTime( $this->mExistingExpiry[$action], $user );
 417                                         $existingExpiryMessage = $context->msg(
 418                                                 'protect-existing-expiry',
 419                                                 $timestamp,
 420                                                 $d,
 421                                                 $t
 422                                         );
 423                                 }
 424                                 $expiryFormOptions->addOption( $existingExpiryMessage->text(), 'existing' );
 425                         }
 426
 427                         $expiryFormOptions->addOption(
 428                                 $context->msg( 'protect-othertime-op' )->text(),
 429                                 'othertime'
 430                         );
 431                         foreach ( explode( ',', $scExpiryOptions ) as $option ) {
 432                                 if ( strpos( $option, ":" ) === false ) {
 433                                         $show = $value = $option;
 434                                 } else {
 435                                         list( $show, $value ) = explode( ":", $option );
 436                                 }
 437                                 $expiryFormOptions->addOption( $show, htmlspecialchars( $value ) );
 438                         }
 439                         # Add expiry dropdown
 440                         if ( $showProtectOptions && !$this->disabled ) {
 441                                 $out .= "
 442                                         <table><tr>
 443                                                 <td class='mw-label'>
 444                                                         {$mProtectexpiry}
 445                                                 </td>
 446                                                 <td class='mw-input'>" .
 447                                                         $expiryFormOptions->getHTML() .
 448                                                 "</td>
 449                                         </tr></table>";
 450                         }
 451                         # Add custom expiry field
 452                         $attribs = [ 'id' => "mwProtect-$action-expires" ] + $this->disabledAttrib;
 453                         $out .= "<table><tr>
 454                                         <td class='mw-label'>" .
 455                                                 $mProtectother .
 456                                         '</td>
 457                                         <td class="mw-input">' .
 458                                                 Xml::input( "mwProtect-expiry-$action", 50, $this->mExpiry[$action], $attribs ) .
 459                                         '</td>
 460                                 </tr></table>';
 461                         $out .= "</td></tr>" .
 462                         Xml::closeElement( 'table' ) .
 463                         Xml::closeElement( 'fieldset' ) .
 464                         "</td></tr>";
 465                 }
 466                 # Give extensions a chance to add items to the form
 467                 Hooks::run( 'ProtectionForm::buildForm', [ $this->mArticle, &$out ] );
 468
 469                 $out .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
 470
 471                 // JavaScript will add another row with a value-chaining checkbox
 472                 if ( $this->mTitle->exists() ) {
 473                         $out .= Xml::openElement( 'table', [ 'id' => 'mw-protect-table2' ] ) .
 474                                 Xml::openElement( 'tbody' );
 475                         $out .= '<tr>
 476                                         <td></td>
 477                                         <td class="mw-input">' .
 478                                                 Xml::checkLabel(
 479                                                         $context->msg( 'protect-cascade' )->text(),
 480                                                         'mwProtect-cascade',
 481                                                         'mwProtect-cascade',
 482                                                         $this->mCascade, $this->disabledAttrib
 483                                                 ) .
 484                                         "</td>
 485                                 </tr>\n";
 486                         $out .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
 487                 }
 488
 489                 # Add manual and custom reason field/selects as well as submit
 490                 if ( !$this->disabled ) {
 491                         $mProtectreasonother = Xml::label(
 492                                 $context->msg( 'protectcomment' )->text(),
 493                                 'wpProtectReasonSelection'
 494                         );
 495
 496                         $mProtectreason = Xml::label(
 497                                 $context->msg( 'protect-otherreason' )->text(),
 498                                 'mwProtect-reason'
 499                         );
 500
 501                         $reasonDropDown = Xml::listDropDown( 'wpProtectReasonSelection',
 502                                 wfMessage( 'protect-dropdown' )->inContentLanguage()->text(),
 503                                 wfMessage( 'protect-otherreason-op' )->inContentLanguage()->text(),
 504                                 $this->mReasonSelection,
 505                                 'mwProtect-reason', 4 );
 506
 507                         $out .= Xml::openElement( 'table', [ 'id' => 'mw-protect-table3' ] ) .
 508                                 Xml::openElement( 'tbody' );
 509                         $out .= "
 510                                 <tr>
 511                                         <td class='mw-label'>
 512                                                 {$mProtectreasonother}
 513                                         </td>
 514                                         <td class='mw-input'>
 515                                                 {$reasonDropDown}
 516                                         </td>
 517                                 </tr>
 518                                 <tr>
 519                                         <td class='mw-label'>
 520                                                 {$mProtectreason}
 521                                         </td>
 522                                         <td class='mw-input'>" .
 523                                                 Xml::input( 'mwProtect-reason', 60, $this->mReason, [ 'type' => 'text',
 524                                                         'id' => 'mwProtect-reason', 'maxlength' => 180 ] ) .
 525                                                         // Limited maxlength as the database trims at 255 bytes and other texts
 526                                                         // chosen by dropdown menus on this page are also included in this database field.
 527                                                         // The byte limit of 180 bytes is enforced in javascript
 528                                         "</td>
 529                                 </tr>";
 530                         # Disallow watching is user is not logged in
 531                         if ( $user->isLoggedIn() ) {
 532                                 $out .= "
 533                                 <tr>
 534                                         <td></td>
 535                                         <td class='mw-input'>" .
 536                                                 Xml::checkLabel( $context->msg( 'watchthis' )->text(),
 537                                                         'mwProtectWatch', 'mwProtectWatch',
 538                                                         $user->isWatched( $this->mTitle ) || $user->getOption( 'watchdefault' ) ) .
 539                                         "</td>
 540                                 </tr>";
 541                         }
 542                         $out .= "
 543                                 <tr>
 544                                         <td></td>
 545                                         <td class='mw-submit'>" .
 546                                                 Xml::submitButton(
 547                                                         $context->msg( 'confirm' )->text(),
 548                                                         [ 'id' => 'mw-Protect-submit' ]
 549                                                 ) .
 550                                         "</td>
 551                                 </tr>\n";
 552                         $out .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
 553                 }
 554                 $out .= Xml::closeElement( 'fieldset' );
 555
 556                 if ( $user->isAllowed( 'editinterface' ) ) {
 557                         $link = Linker::linkKnown(
 558                                 $context->msg( 'protect-dropdown' )->inContentLanguage()->getTitle(),
 559                                 $context->msg( 'protect-edit-reasonlist' )->escaped(),
 560                                 [],
 561                                 [ 'action' => 'edit' ]
 562                         );
 563                         $out .= '<p class="mw-protect-editreasons">' . $link . '</p>';
 564                 }
 565
 566                 if ( !$this->disabled ) {
 567                         $out .= Html::hidden(
 568                                 'wpEditToken',
 569                                 $user->getEditToken( [ 'protect', $this->mTitle->getPrefixedDBkey() ] )
 570                         );
 571                         $out .= Xml::closeElement( 'form' );
 572                 }
 573
 574                 return $out;
 575         }
 576
 577         /**
 578          * Build protection level selector
 579          *
 580          * @param string $action Action to protect
 581          * @param string $selected Current protection level
 582          * @return string HTML fragment
 583          */
 584         function buildSelector( $action, $selected ) {
 585                 // If the form is disabled, display all relevant levels. Otherwise,
 586                 // just show the ones this user can use.
 587                 $levels = MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace(),
 588                         $this->disabled ? null : $this->mContext->getUser()
 589                 );
 590
 591                 $id = 'mwProtect-level-' . $action;
 592
 593                 $select = new XmlSelect( $id, $id, $selected );
 594                 $select->setAttribute( 'size', count( $levels ) );
 595                 if ( $this->disabled ) {
 596                         $select->setAttribute( 'disabled', 'disabled' );
 597                 }
 598
 599                 foreach ( $levels as $key ) {
 600                         $select->addOption( $this->getOptionLabel( $key ), $key );
 601                 }
 602
 603                 return $select->getHTML();
 604         }
 605
 606         /**
 607          * Prepare the label for a protection selector option
 608          *
 609          * @param string $permission Permission required
 610          * @return string
 611          */
 612         private function getOptionLabel( $permission ) {
 613                 if ( $permission == '' ) {
 614                         return $this->mContext->msg( 'protect-default' )->text();
 615                 } else {
 616                         // Messages: protect-level-autoconfirmed, protect-level-sysop
 617                         $msg = $this->mContext->msg( "protect-level-{$permission}" );
 618                         if ( $msg->exists() ) {
 619                                 return $msg->text();
 620                         }
 621                         return $this->mContext->msg( 'protect-fallback', $permission )->text();
 622                 }
 623         }
 624
 625         /**
 626          * Show protection long extracts for this page
 627          *
 628          * @param OutputPage $out
 629          * @access private
 630          */
 631         function showLogExtract( &$out ) {
 632                 # Show relevant lines from the protection log:
 633                 $protectLogPage = new LogPage( 'protect' );
 634                 $out->addHTML( Xml::element( 'h2', null, $protectLogPage->getName()->text() ) );
 635                 LogEventsList::showLogExtract( $out, 'protect', $this->mTitle );
 636                 # Let extensions add other relevant log extracts
 637                 Hooks::run( 'ProtectionForm::showLogExtract', [ $this->mArticle, $out ] );
 638         }
 639 }