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 use MediaWiki\MediaWikiServices;
  26
  27 /**
  28  * Handles the page protection UI and backend
  29  */
  30 class ProtectionForm {
  31         /** @var array A map of action to restriction level, from request or default */
  32         protected $mRestrictions = [];
  33
  34         /** @var string The custom/additional protection reason */
  35         protected $mReason = '';
  36
  37         /** @var string The reason selected from the list, blank for other/additional */
  38         protected $mReasonSelection = '';
  39
  40         /** @var bool True if the restrictions are cascading, from request or existing protection */
  41         protected $mCascade = false;
  42
  43         /** @var array Map of action to "other" expiry time. Used in preference to mExpirySelection. */
  44         protected $mExpiry = [];
  45
  46         /**
  47          * @var array Map of action to value selected in expiry drop-down list.
  48          * Will be set to 'othertime' whenever mExpiry is set.
  49          */
  50         protected $mExpirySelection = [];
  51
  52         /** @var array Permissions errors for the protect action */
  53         protected $mPermErrors = [];
  54
  55         /** @var array Types (i.e. actions) for which levels can be selected */
  56         protected $mApplicableTypes = [];
  57
  58         /** @var array Map of action to the expiry time of the existing protection */
  59         protected $mExistingExpiry = [];
  60
  61         /** @var IContextSource */
  62         private $mContext;
  63
  64         function __construct( Article $article ) {
  65                 // Set instance variables.
  66                 $this->mArticle = $article;
  67                 $this->mTitle = $article->getTitle();
  68                 $this->mApplicableTypes = $this->mTitle->getRestrictionTypes();
  69                 $this->mContext = $article->getContext();
  70
  71                 // Check if the form should be disabled.
  72                 // If it is, the form will be available in read-only to show levels.
  73                 $this->mPermErrors = $this->mTitle->getUserPermissionsErrors(
  74                         'protect',
  75                         $this->mContext->getUser(),
  76                         $this->mContext->getRequest()->wasPosted() ? 'secure' : 'full' // T92357
  77                 );
  78                 if ( wfReadOnly() ) {
  79                         $this->mPermErrors[] = [ 'readonlytext', wfReadOnlyReason() ];
  80                 }
  81                 $this->disabled = $this->mPermErrors != [];
  82                 $this->disabledAttrib = $this->disabled
  83                         ? [ 'disabled' => 'disabled' ]
  84                         : [];
  85
  86                 $this->loadData();
  87         }
  88
  89         /**
  90          * Loads the current state of protection into the object.
  91          */
  92         function loadData() {
  93                 $levels = MediaWikiServices::getInstance()->getPermissionManager()->getNamespaceRestrictionLevels(
  94                         $this->mTitle->getNamespace(), $this->mContext->getUser()
  95                 );
  96                 $this->mCascade = $this->mTitle->areRestrictionsCascading();
  97
  98                 $request = $this->mContext->getRequest();
  99                 $this->mReason = $request->getText( 'mwProtect-reason' );
 100                 $this->mReasonSelection = $request->getText( 'wpProtectReasonSelection' );
 101                 $this->mCascade = $request->getBool( 'mwProtect-cascade', $this->mCascade );
 102
 103                 foreach ( $this->mApplicableTypes as $action ) {
 104                         // @todo FIXME: This form currently requires individual selections,
 105                         // but the db allows multiples separated by commas.
 106
 107                         // Pull the actual restriction from the DB
 108                         $this->mRestrictions[$action] = implode( '', $this->mTitle->getRestrictions( $action ) );
 109
 110                         if ( !$this->mRestrictions[$action] ) {
 111                                 // No existing expiry
 112                                 $existingExpiry = '';
 113                         } else {
 114                                 $existingExpiry = $this->mTitle->getRestrictionExpiry( $action );
 115                         }
 116                         $this->mExistingExpiry[$action] = $existingExpiry;
 117
 118                         $requestExpiry = $request->getText( "mwProtect-expiry-$action" );
 119                         $requestExpirySelection = $request->getVal( "wpProtectExpirySelection-$action" );
 120
 121                         if ( $requestExpiry ) {
 122                                 // Custom expiry takes precedence
 123                                 $this->mExpiry[$action] = $requestExpiry;
 124                                 $this->mExpirySelection[$action] = 'othertime';
 125                         } elseif ( $requestExpirySelection ) {
 126                                 // Expiry selected from list
 127                                 $this->mExpiry[$action] = '';
 128                                 $this->mExpirySelection[$action] = $requestExpirySelection;
 129                         } elseif ( $existingExpiry ) {
 130                                 // Use existing expiry in its own list item
 131                                 $this->mExpiry[$action] = '';
 132                                 $this->mExpirySelection[$action] = $existingExpiry;
 133                         } else {
 134                                 // Catches 'infinity' - Existing expiry is infinite, use "infinite" in drop-down
 135                                 // Final default: infinite
 136                                 $this->mExpiry[$action] = '';
 137                                 $this->mExpirySelection[$action] = 'infinite';
 138                         }
 139
 140                         $val = $request->getVal( "mwProtect-level-$action" );
 141                         if ( isset( $val ) && in_array( $val, $levels ) ) {
 142                                 $this->mRestrictions[$action] = $val;
 143                         }
 144                 }
 145         }
 146
 147         /**
 148          * Get the expiry time for a given action, by combining the relevant inputs.
 149          *
 150          * @param string $action
 151          *
 152          * @return string|false 14-char timestamp or "infinity", or false if the input was invalid
 153          */
 154         function getExpiry( $action ) {
 155                 if ( $this->mExpirySelection[$action] == 'existing' ) {
 156                         return $this->mExistingExpiry[$action];
 157                 } elseif ( $this->mExpirySelection[$action] == 'othertime' ) {
 158                         $value = $this->mExpiry[$action];
 159                 } else {
 160                         $value = $this->mExpirySelection[$action];
 161                 }
 162                 if ( wfIsInfinity( $value ) ) {
 163                         $time = 'infinity';
 164                 } else {
 165                         $unix = strtotime( $value );
 166
 167                         if ( !$unix || $unix === -1 ) {
 168                                 return false;
 169                         }
 170
 171                         // @todo FIXME: Non-qualified absolute times are not in users specified timezone
 172                         // and there isn't notice about it in the ui
 173                         $time = wfTimestamp( TS_MW, $unix );
 174                 }
 175                 return $time;
 176         }
 177
 178         /**
 179          * Main entry point for action=protect and action=unprotect
 180          */
 181         function execute() {
 182                 if (
 183                         MediaWikiServices::getInstance()->getPermissionManager()->getNamespaceRestrictionLevels(
 184                                 $this->mTitle->getNamespace()
 185                         ) === [ '' ]
 186                 ) {
 187                         throw new ErrorPageError( 'protect-badnamespace-title', 'protect-badnamespace-text' );
 188                 }
 189
 190                 if ( $this->mContext->getRequest()->wasPosted() ) {
 191                         if ( $this->save() ) {
 192                                 $q = $this->mArticle->isRedirect() ? 'redirect=no' : '';
 193                                 $this->mContext->getOutput()->redirect( $this->mTitle->getFullURL( $q ) );
 194                         }
 195                 } else {
 196                         $this->show();
 197                 }
 198         }
 199
 200         /**
 201          * Show the input form with optional error message
 202          *
 203          * @param string|string[]|null $err Error message or null if there's no error
 204          */
 205         function show( $err = null ) {
 206                 $out = $this->mContext->getOutput();
 207                 $out->setRobotPolicy( 'noindex,nofollow' );
 208                 $out->addBacklinkSubtitle( $this->mTitle );
 209
 210                 if ( is_array( $err ) ) {
 211                         $out->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n", $err );
 212                 } elseif ( is_string( $err ) ) {
 213                         $out->addHTML( "<div class='error'>{$err}</div>\n" );
 214                 }
 215
 216                 if ( $this->mTitle->getRestrictionTypes() === [] ) {
 217                         // No restriction types available for the current title
 218                         // this might happen if an extension alters the available types
 219                         $out->setPageTitle( $this->mContext->msg(
 220                                 'protect-norestrictiontypes-title',
 221                                 $this->mTitle->getPrefixedText()
 222                         ) );
 223                         $out->addWikiTextAsInterface(
 224                                 $this->mContext->msg( 'protect-norestrictiontypes-text' )->plain()
 225                         );
 226
 227                         // Show the log in case protection was possible once
 228                         $this->showLogExtract( $out );
 229                         // return as there isn't anything else we can do
 230                         return;
 231                 }
 232
 233                 list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
 234                 if ( $cascadeSources && count( $cascadeSources ) > 0 ) {
 235                         $titles = '';
 236
 237                         foreach ( $cascadeSources as $title ) {
 238                                 $titles .= '* [[:' . $title->getPrefixedText() . "]]\n";
 239                         }
 240
 241                         /** @todo FIXME: i18n issue, should use formatted number. */
 242                         $out->wrapWikiMsg(
 243                                 "<div id=\"mw-protect-cascadeon\">\n$1\n" . $titles . "</div>",
 244                                 [ 'protect-cascadeon', count( $cascadeSources ) ]
 245                         );
 246                 }
 247
 248                 # Show an appropriate message if the user isn't allowed or able to change
 249                 # the protection settings at this time
 250                 if ( $this->disabled ) {
 251                         $out->setPageTitle(
 252                                 $this->mContext->msg( 'protect-title-notallowed',
 253                                         $this->mTitle->getPrefixedText() )
 254                         );
 255                         $out->addWikiTextAsInterface( $out->formatPermissionsErrorMessage(
 256                                 $this->mPermErrors, 'protect'
 257                         ) );
 258                 } else {
 259                         $out->setPageTitle( $this->mContext->msg( 'protect-title', $this->mTitle->getPrefixedText() ) );
 260                         $out->addWikiMsg( 'protect-text',
 261                                 wfEscapeWikiText( $this->mTitle->getPrefixedText() ) );
 262                 }
 263
 264                 $out->addHTML( $this->buildForm() );
 265                 $this->showLogExtract( $out );
 266         }
 267
 268         /**
 269          * Save submitted protection form
 270          *
 271          * @return bool Success
 272          */
 273         function save() {
 274                 # Permission check!
 275                 if ( $this->disabled ) {
 276                         $this->show();
 277                         return false;
 278                 }
 279
 280                 $request = $this->mContext->getRequest();
 281                 $user = $this->mContext->getUser();
 282                 $out = $this->mContext->getOutput();
 283                 $token = $request->getVal( 'wpEditToken' );
 284                 if ( !$user->matchEditToken( $token, [ 'protect', $this->mTitle->getPrefixedDBkey() ] ) ) {
 285                         $this->show( [ 'sessionfailure' ] );
 286                         return false;
 287                 }
 288
 289                 # Create reason string. Use list and/or custom string.
 290                 $reasonstr = $this->mReasonSelection;
 291                 if ( $reasonstr != 'other' && $this->mReason != '' ) {
 292                         // Entry from drop down menu + additional comment
 293                         $reasonstr .= $this->mContext->msg( 'colon-separator' )->text() . $this->mReason;
 294                 } elseif ( $reasonstr == 'other' ) {
 295                         $reasonstr = $this->mReason;
 296                 }
 297                 $expiry = [];
 298                 foreach ( $this->mApplicableTypes as $action ) {
 299                         $expiry[$action] = $this->getExpiry( $action );
 300                         if ( empty( $this->mRestrictions[$action] ) ) {
 301                                 continue; // unprotected
 302                         }
 303                         if ( !$expiry[$action] ) {
 304                                 $this->show( [ 'protect_expiry_invalid' ] );
 305                                 return false;
 306                         }
 307                         if ( $expiry[$action] < wfTimestampNow() ) {
 308                                 $this->show( [ 'protect_expiry_old' ] );
 309                                 return false;
 310                         }
 311                 }
 312
 313                 $this->mCascade = $request->getBool( 'mwProtect-cascade' );
 314
 315                 $status = $this->mArticle->doUpdateRestrictions(
 316                         $this->mRestrictions,
 317                         $expiry,
 318                         $this->mCascade,
 319                         $reasonstr,
 320                         $user
 321                 );
 322
 323                 if ( !$status->isOK() ) {
 324                         $this->show( $out->parseInlineAsInterface( $status->getWikiText() ) );
 325                         return false;
 326                 }
 327
 328                 /**
 329                  * Give extensions a change to handle added form items
 330                  *
 331                  * @since 1.19 you can (and you should) return false to abort saving;
 332                  *             you can also return an array of message name and its parameters
 333                  */
 334                 $errorMsg = '';
 335                 if ( !Hooks::run( 'ProtectionForm::save', [ $this->mArticle, &$errorMsg, $reasonstr ] ) ) {
 336                         if ( $errorMsg == '' ) {
 337                                 $errorMsg = [ 'hookaborted' ];
 338                         }
 339                 }
 340                 if ( $errorMsg != '' ) {
 341                         $this->show( $errorMsg );
 342                         return false;
 343                 }
 344
 345                 WatchAction::doWatchOrUnwatch( $request->getCheck( 'mwProtectWatch' ), $this->mTitle, $user );
 346
 347                 return true;
 348         }
 349
 350         /**
 351          * Build the input form
 352          *
 353          * @return string HTML form
 354          */
 355         function buildForm() {
 356                 $context = $this->mContext;
 357                 $user = $context->getUser();
 358                 $output = $context->getOutput();
 359                 $lang = $context->getLanguage();
 360                 $out = '';
 361                 if ( !$this->disabled ) {
 362                         $output->addModules( 'mediawiki.legacy.protect' );
 363                         $out .= Xml::openElement( 'form', [ 'method' => 'post',
 364                                 'action' => $this->mTitle->getLocalURL( 'action=protect' ),
 365                                 'id' => 'mw-Protect-Form' ] );
 366                 }
 367
 368                 $out .= Xml::openElement( 'fieldset' ) .
 369                         Xml::element( 'legend', null, $context->msg( 'protect-legend' )->text() ) .
 370                         Xml::openElement( 'table', [ 'id' => 'mwProtectSet' ] ) .
 371                         Xml::openElement( 'tbody' );
 372
 373                 $scExpiryOptions = wfMessage( 'protect-expiry-options' )->inContentLanguage()->text();
 374                 $showProtectOptions = $scExpiryOptions !== '-' && !$this->disabled;
 375
 376                 // Not all languages have V_x <-> N_x relation
 377                 foreach ( $this->mRestrictions as $action => $selected ) {
 378                         // Messages:
 379                         // restriction-edit, restriction-move, restriction-create, restriction-upload
 380                         $msg = $context->msg( 'restriction-' . $action );
 381                         $out .= "<tr><td>" .
 382                         Xml::openElement( 'fieldset' ) .
 383                         Xml::element( 'legend', null, $msg->exists() ? $msg->text() : $action ) .
 384                         Xml::openElement( 'table', [ 'id' => "mw-protect-table-$action" ] ) .
 385                                 "<tr><td>" . $this->buildSelector( $action, $selected ) . "</td></tr><tr><td>";
 386
 387                         $mProtectexpiry = Xml::label(
 388                                 $context->msg( 'protectexpiry' )->text(),
 389                                 "mwProtectExpirySelection-$action"
 390                         );
 391                         $mProtectother = Xml::label(
 392                                 $context->msg( 'protect-othertime' )->text(),
 393                                 "mwProtect-$action-expires"
 394                         );
 395
 396                         $expiryFormOptions = new XmlSelect(
 397                                 "wpProtectExpirySelection-$action",
 398                                 "mwProtectExpirySelection-$action",
 399                                 $this->mExpirySelection[$action]
 400                         );
 401                         $expiryFormOptions->setAttribute( 'tabindex', '2' );
 402                         if ( $this->disabled ) {
 403                                 $expiryFormOptions->setAttribute( 'disabled', 'disabled' );
 404                         }
 405
 406                         if ( $this->mExistingExpiry[$action] ) {
 407                                 if ( $this->mExistingExpiry[$action] == 'infinity' ) {
 408                                         $existingExpiryMessage = $context->msg( 'protect-existing-expiry-infinity' );
 409                                 } else {
 410                                         $timestamp = $lang->userTimeAndDate( $this->mExistingExpiry[$action], $user );
 411                                         $d = $lang->userDate( $this->mExistingExpiry[$action], $user );
 412                                         $t = $lang->userTime( $this->mExistingExpiry[$action], $user );
 413                                         $existingExpiryMessage = $context->msg(
 414                                                 'protect-existing-expiry',
 415                                                 $timestamp,
 416                                                 $d,
 417                                                 $t
 418                                         );
 419                                 }
 420                                 $expiryFormOptions->addOption( $existingExpiryMessage->text(), 'existing' );
 421                         }
 422
 423                         $expiryFormOptions->addOption(
 424                                 $context->msg( 'protect-othertime-op' )->text(),
 425                                 'othertime'
 426                         );
 427                         foreach ( explode( ',', $scExpiryOptions ) as $option ) {
 428                                 if ( strpos( $option, ":" ) === false ) {
 429                                         $show = $value = $option;
 430                                 } else {
 431                                         list( $show, $value ) = explode( ":", $option );
 432                                 }
 433                                 $expiryFormOptions->addOption( $show, htmlspecialchars( $value ) );
 434                         }
 435                         # Add expiry dropdown
 436                         if ( $showProtectOptions && !$this->disabled ) {
 437                                 $out .= "
 438                                         <table><tr>
 439                                                 <td class='mw-label'>
 440                                                         {$mProtectexpiry}
 441                                                 </td>
 442                                                 <td class='mw-input'>" .
 443                                                         $expiryFormOptions->getHTML() .
 444                                                 "</td>
 445                                         </tr></table>";
 446                         }
 447                         # Add custom expiry field
 448                         $attribs = [ 'id' => "mwProtect-$action-expires" ] + $this->disabledAttrib;
 449                         $out .= "<table><tr>
 450                                         <td class='mw-label'>" .
 451                                                 $mProtectother .
 452                                         '</td>
 453                                         <td class="mw-input">' .
 454                                                 Xml::input( "mwProtect-expiry-$action", 50, $this->mExpiry[$action], $attribs ) .
 455                                         '</td>
 456                                 </tr></table>';
 457                         $out .= "</td></tr>" .
 458                         Xml::closeElement( 'table' ) .
 459                         Xml::closeElement( 'fieldset' ) .
 460                         "</td></tr>";
 461                 }
 462                 # Give extensions a chance to add items to the form
 463                 Hooks::run( 'ProtectionForm::buildForm', [ $this->mArticle, &$out ] );
 464
 465                 $out .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
 466
 467                 // JavaScript will add another row with a value-chaining checkbox
 468                 if ( $this->mTitle->exists() ) {
 469                         $out .= Xml::openElement( 'table', [ 'id' => 'mw-protect-table2' ] ) .
 470                                 Xml::openElement( 'tbody' );
 471                         $out .= '<tr>
 472                                         <td></td>
 473                                         <td class="mw-input">' .
 474                                                 Xml::checkLabel(
 475                                                         $context->msg( 'protect-cascade' )->text(),
 476                                                         'mwProtect-cascade',
 477                                                         'mwProtect-cascade',
 478                                                         $this->mCascade, $this->disabledAttrib
 479                                                 ) .
 480                                         "</td>
 481                                 </tr>\n";
 482                         $out .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
 483                 }
 484
 485                 # Add manual and custom reason field/selects as well as submit
 486                 if ( !$this->disabled ) {
 487                         $mProtectreasonother = Xml::label(
 488                                 $context->msg( 'protectcomment' )->text(),
 489                                 'wpProtectReasonSelection'
 490                         );
 491
 492                         $mProtectreason = Xml::label(
 493                                 $context->msg( 'protect-otherreason' )->text(),
 494                                 'mwProtect-reason'
 495                         );
 496
 497                         $reasonDropDown = Xml::listDropDown( 'wpProtectReasonSelection',
 498                                 wfMessage( 'protect-dropdown' )->inContentLanguage()->text(),
 499                                 wfMessage( 'protect-otherreason-op' )->inContentLanguage()->text(),
 500                                 $this->mReasonSelection,
 501                                 'mwProtect-reason', 4 );
 502
 503                         // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
 504                         // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
 505                         // Unicode codepoints.
 506                         // Subtract arbitrary 75 to leave some space for the autogenerated null edit's summary
 507                         // and other texts chosen by dropdown menus on this page.
 508                         $maxlength = CommentStore::COMMENT_CHARACTER_LIMIT - 75;
 509
 510                         $out .= Xml::openElement( 'table', [ 'id' => 'mw-protect-table3' ] ) .
 511                                 Xml::openElement( 'tbody' );
 512                         $out .= "
 513                                 <tr>
 514                                         <td class='mw-label'>
 515                                                 {$mProtectreasonother}
 516                                         </td>
 517                                         <td class='mw-input'>
 518                                                 {$reasonDropDown}
 519                                         </td>
 520                                 </tr>
 521                                 <tr>
 522                                         <td class='mw-label'>
 523                                                 {$mProtectreason}
 524                                         </td>
 525                                         <td class='mw-input'>" .
 526                                                 Xml::input( 'mwProtect-reason', 60, $this->mReason, [ 'type' => 'text',
 527                                                         'id' => 'mwProtect-reason', 'maxlength' => $maxlength ] ) .
 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 ( MediaWikiServices::getInstance()->getPermissionManager()
 557                                 ->userHasRight( $user, 'editinterface' ) ) {
 558                         $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
 559                         $link = $linkRenderer->makeKnownLink(
 560                                 $context->msg( 'protect-dropdown' )->inContentLanguage()->getTitle(),
 561                                 $context->msg( 'protect-edit-reasonlist' )->text(),
 562                                 [],
 563                                 [ 'action' => 'edit' ]
 564                         );
 565                         $out .= '<p class="mw-protect-editreasons">' . $link . '</p>';
 566                 }
 567
 568                 if ( !$this->disabled ) {
 569                         $out .= Html::hidden(
 570                                 'wpEditToken',
 571                                 $user->getEditToken( [ 'protect', $this->mTitle->getPrefixedDBkey() ] )
 572                         );
 573                         $out .= Xml::closeElement( 'form' );
 574                 }
 575
 576                 return $out;
 577         }
 578
 579         /**
 580          * Build protection level selector
 581          *
 582          * @param string $action Action to protect
 583          * @param string $selected Current protection level
 584          * @return string HTML fragment
 585          */
 586         function buildSelector( $action, $selected ) {
 587                 // If the form is disabled, display all relevant levels. Otherwise,
 588                 // just show the ones this user can use.
 589                 $levels = MediaWikiServices::getInstance()
 590                                 ->getPermissionManager()
 591                                 ->getNamespaceRestrictionLevels(
 592                                         $this->mTitle->getNamespace(),
 593                                         $this->disabled ? null : $this->mContext->getUser()
 594                                 );
 595
 596                 $id = 'mwProtect-level-' . $action;
 597
 598                 $select = new XmlSelect( $id, $id, $selected );
 599                 $select->setAttribute( 'size', count( $levels ) );
 600                 if ( $this->disabled ) {
 601                         $select->setAttribute( 'disabled', 'disabled' );
 602                 }
 603
 604                 foreach ( $levels as $key ) {
 605                         $select->addOption( $this->getOptionLabel( $key ), $key );
 606                 }
 607
 608                 return $select->getHTML();
 609         }
 610
 611         /**
 612          * Prepare the label for a protection selector option
 613          *
 614          * @param string $permission Permission required
 615          * @return string
 616          */
 617         private function getOptionLabel( $permission ) {
 618                 if ( $permission == '' ) {
 619                         return $this->mContext->msg( 'protect-default' )->text();
 620                 } else {
 621                         // Messages: protect-level-autoconfirmed, protect-level-sysop
 622                         $msg = $this->mContext->msg( "protect-level-{$permission}" );
 623                         if ( $msg->exists() ) {
 624                                 return $msg->text();
 625                         }
 626                         return $this->mContext->msg( 'protect-fallback', $permission )->text();
 627                 }
 628         }
 629
 630         /**
 631          * Show protection long extracts for this page
 632          *
 633          * @param OutputPage $out
 634          */
 635         private function showLogExtract( OutputPage $out ) {
 636                 # Show relevant lines from the protection log:
 637                 $protectLogPage = new LogPage( 'protect' );
 638                 $out->addHTML( Xml::element( 'h2', null, $protectLogPage->getName()->text() ) );
 639                 LogEventsList::showLogExtract( $out, 'protect', $this->mTitle );
 640                 # Let extensions add other relevant log extracts
 641                 Hooks::run( 'ProtectionForm::showLogExtract', [ $this->mArticle, $out ] );
 642         }
 643 }