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 = MWNamespace::getRestrictionLevels(
  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 ( MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) === [ '' ] ) {
 183                         throw new ErrorPageError( 'protect-badnamespace-title', 'protect-badnamespace-text' );
 184                 }
 185
 186                 if ( $this->mContext->getRequest()->wasPosted() ) {
 187                         if ( $this->save() ) {
 188                                 $q = $this->mArticle->isRedirect() ? 'redirect=no' : '';
 189                                 $this->mContext->getOutput()->redirect( $this->mTitle->getFullURL( $q ) );
 190                         }
 191                 } else {
 192                         $this->show();
 193                 }
 194         }
 195
 196         /**
 197          * Show the input form with optional error message
 198          *
 199          * @param string $err Error message or null if there's no error
 200          */
 201         function show( $err = null ) {
 202                 $out = $this->mContext->getOutput();
 203                 $out->setRobotPolicy( 'noindex,nofollow' );
 204                 $out->addBacklinkSubtitle( $this->mTitle );
 205
 206                 if ( is_array( $err ) ) {
 207                         $out->wrapWikiMsg( "<p class='error'>\n$1\n</p>\n", $err );
 208                 } elseif ( is_string( $err ) ) {
 209                         $out->addHTML( "<p class='error'>{$err}</p>\n" );
 210                 }
 211
 212                 if ( $this->mTitle->getRestrictionTypes() === [] ) {
 213                         // No restriction types available for the current title
 214                         // this might happen if an extension alters the available types
 215                         $out->setPageTitle( $this->mContext->msg(
 216                                 'protect-norestrictiontypes-title',
 217                                 $this->mTitle->getPrefixedText()
 218                         ) );
 219                         $out->addWikiText( $this->mContext->msg( 'protect-norestrictiontypes-text' )->plain() );
 220
 221                         // Show the log in case protection was possible once
 222                         $this->showLogExtract( $out );
 223                         // return as there isn't anything else we can do
 224                         return;
 225                 }
 226
 227                 list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
 228                 if ( $cascadeSources && count( $cascadeSources ) > 0 ) {
 229                         $titles = '';
 230
 231                         foreach ( $cascadeSources as $title ) {
 232                                 $titles .= '* [[:' . $title->getPrefixedText() . "]]\n";
 233                         }
 234
 235                         /** @todo FIXME: i18n issue, should use formatted number. */
 236                         $out->wrapWikiMsg(
 237                                 "<div id=\"mw-protect-cascadeon\">\n$1\n" . $titles . "</div>",
 238                                 [ 'protect-cascadeon', count( $cascadeSources ) ]
 239                         );
 240                 }
 241
 242                 # Show an appropriate message if the user isn't allowed or able to change
 243                 # the protection settings at this time
 244                 if ( $this->disabled ) {
 245                         $out->setPageTitle(
 246                                 $this->mContext->msg( 'protect-title-notallowed',
 247                                         $this->mTitle->getPrefixedText() )
 248                         );
 249                         $out->addWikiText( $out->formatPermissionsErrorMessage( $this->mPermErrors, 'protect' ) );
 250                 } else {
 251                         $out->setPageTitle( $this->mContext->msg( 'protect-title', $this->mTitle->getPrefixedText() ) );
 252                         $out->addWikiMsg( 'protect-text',
 253                                 wfEscapeWikiText( $this->mTitle->getPrefixedText() ) );
 254                 }
 255
 256                 $out->addHTML( $this->buildForm() );
 257                 $this->showLogExtract( $out );
 258         }
 259
 260         /**
 261          * Save submitted protection form
 262          *
 263          * @return bool Success
 264          */
 265         function save() {
 266                 # Permission check!
 267                 if ( $this->disabled ) {
 268                         $this->show();
 269                         return false;
 270                 }
 271
 272                 $request = $this->mContext->getRequest();
 273                 $user = $this->mContext->getUser();
 274                 $out = $this->mContext->getOutput();
 275                 $token = $request->getVal( 'wpEditToken' );
 276                 if ( !$user->matchEditToken( $token, [ 'protect', $this->mTitle->getPrefixedDBkey() ] ) ) {
 277                         $this->show( [ 'sessionfailure' ] );
 278                         return false;
 279                 }
 280
 281                 # Create reason string. Use list and/or custom string.
 282                 $reasonstr = $this->mReasonSelection;
 283                 if ( $reasonstr != 'other' && $this->mReason != '' ) {
 284                         // Entry from drop down menu + additional comment
 285                         $reasonstr .= $this->mContext->msg( 'colon-separator' )->text() . $this->mReason;
 286                 } elseif ( $reasonstr == 'other' ) {
 287                         $reasonstr = $this->mReason;
 288                 }
 289                 $expiry = [];
 290                 foreach ( $this->mApplicableTypes as $action ) {
 291                         $expiry[$action] = $this->getExpiry( $action );
 292                         if ( empty( $this->mRestrictions[$action] ) ) {
 293                                 continue; // unprotected
 294                         }
 295                         if ( !$expiry[$action] ) {
 296                                 $this->show( [ 'protect_expiry_invalid' ] );
 297                                 return false;
 298                         }
 299                         if ( $expiry[$action] < wfTimestampNow() ) {
 300                                 $this->show( [ 'protect_expiry_old' ] );
 301                                 return false;
 302                         }
 303                 }
 304
 305                 $this->mCascade = $request->getBool( 'mwProtect-cascade' );
 306
 307                 $status = $this->mArticle->doUpdateRestrictions(
 308                         $this->mRestrictions,
 309                         $expiry,
 310                         $this->mCascade,
 311                         $reasonstr,
 312                         $user
 313                 );
 314
 315                 if ( !$status->isOK() ) {
 316                         $this->show( $out->parseInline( $status->getWikiText() ) );
 317                         return false;
 318                 }
 319
 320                 /**
 321                  * Give extensions a change to handle added form items
 322                  *
 323                  * @since 1.19 you can (and you should) return false to abort saving;
 324                  *             you can also return an array of message name and its parameters
 325                  */
 326                 $errorMsg = '';
 327                 if ( !Hooks::run( 'ProtectionForm::save', [ $this->mArticle, &$errorMsg, $reasonstr ] ) ) {
 328                         if ( $errorMsg == '' ) {
 329                                 $errorMsg = [ 'hookaborted' ];
 330                         }
 331                 }
 332                 if ( $errorMsg != '' ) {
 333                         $this->show( $errorMsg );
 334                         return false;
 335                 }
 336
 337                 WatchAction::doWatchOrUnwatch( $request->getCheck( 'mwProtectWatch' ), $this->mTitle, $user );
 338
 339                 return true;
 340         }
 341
 342         /**
 343          * Build the input form
 344          *
 345          * @return string HTML form
 346          */
 347         function buildForm() {
 348                 $context = $this->mContext;
 349                 $user = $context->getUser();
 350                 $output = $context->getOutput();
 351                 $lang = $context->getLanguage();
 352                 $conf = $context->getConfig();
 353                 $cascadingRestrictionLevels = $conf->get( 'CascadingRestrictionLevels' );
 354                 $oldCommentSchema = $conf->get( 'CommentTableSchemaMigrationStage' ) === MIGRATION_OLD;
 355                 $out = '';
 356                 if ( !$this->disabled ) {
 357                         $output->addModules( 'mediawiki.legacy.protect' );
 358                         $output->addJsConfigVars( 'wgCascadeableLevels', $cascadingRestrictionLevels );
 359                         $out .= Xml::openElement( 'form', [ 'method' => 'post',
 360                                 'action' => $this->mTitle->getLocalURL( 'action=protect' ),
 361                                 'id' => 'mw-Protect-Form' ] );
 362                 }
 363
 364                 $out .= Xml::openElement( 'fieldset' ) .
 365                         Xml::element( 'legend', null, $context->msg( 'protect-legend' )->text() ) .
 366                         Xml::openElement( 'table', [ 'id' => 'mwProtectSet' ] ) .
 367                         Xml::openElement( 'tbody' );
 368
 369                 $scExpiryOptions = wfMessage( 'protect-expiry-options' )->inContentLanguage()->text();
 370                 $showProtectOptions = $scExpiryOptions !== '-' && !$this->disabled;
 371
 372                 // Not all languages have V_x <-> N_x relation
 373                 foreach ( $this->mRestrictions as $action => $selected ) {
 374                         // Messages:
 375                         // restriction-edit, restriction-move, restriction-create, restriction-upload
 376                         $msg = $context->msg( 'restriction-' . $action );
 377                         $out .= "<tr><td>" .
 378                         Xml::openElement( 'fieldset' ) .
 379                         Xml::element( 'legend', null, $msg->exists() ? $msg->text() : $action ) .
 380                         Xml::openElement( 'table', [ 'id' => "mw-protect-table-$action" ] ) .
 381                                 "<tr><td>" . $this->buildSelector( $action, $selected ) . "</td></tr><tr><td>";
 382
 383                         $mProtectexpiry = Xml::label(
 384                                 $context->msg( 'protectexpiry' )->text(),
 385                                 "mwProtectExpirySelection-$action"
 386                         );
 387                         $mProtectother = Xml::label(
 388                                 $context->msg( 'protect-othertime' )->text(),
 389                                 "mwProtect-$action-expires"
 390                         );
 391
 392                         $expiryFormOptions = new XmlSelect(
 393                                 "wpProtectExpirySelection-$action",
 394                                 "mwProtectExpirySelection-$action",
 395                                 $this->mExpirySelection[$action]
 396                         );
 397                         $expiryFormOptions->setAttribute( 'tabindex', '2' );
 398                         if ( $this->disabled ) {
 399                                 $expiryFormOptions->setAttribute( 'disabled', 'disabled' );
 400                         }
 401
 402                         if ( $this->mExistingExpiry[$action] ) {
 403                                 if ( $this->mExistingExpiry[$action] == 'infinity' ) {
 404                                         $existingExpiryMessage = $context->msg( 'protect-existing-expiry-infinity' );
 405                                 } else {
 406                                         $timestamp = $lang->userTimeAndDate( $this->mExistingExpiry[$action], $user );
 407                                         $d = $lang->userDate( $this->mExistingExpiry[$action], $user );
 408                                         $t = $lang->userTime( $this->mExistingExpiry[$action], $user );
 409                                         $existingExpiryMessage = $context->msg(
 410                                                 'protect-existing-expiry',
 411                                                 $timestamp,
 412                                                 $d,
 413                                                 $t
 414                                         );
 415                                 }
 416                                 $expiryFormOptions->addOption( $existingExpiryMessage->text(), 'existing' );
 417                         }
 418
 419                         $expiryFormOptions->addOption(
 420                                 $context->msg( 'protect-othertime-op' )->text(),
 421                                 'othertime'
 422                         );
 423                         foreach ( explode( ',', $scExpiryOptions ) as $option ) {
 424                                 if ( strpos( $option, ":" ) === false ) {
 425                                         $show = $value = $option;
 426                                 } else {
 427                                         list( $show, $value ) = explode( ":", $option );
 428                                 }
 429                                 $expiryFormOptions->addOption( $show, htmlspecialchars( $value ) );
 430                         }
 431                         # Add expiry dropdown
 432                         if ( $showProtectOptions && !$this->disabled ) {
 433                                 $out .= "
 434                                         <table><tr>
 435                                                 <td class='mw-label'>
 436                                                         {$mProtectexpiry}
 437                                                 </td>
 438                                                 <td class='mw-input'>" .
 439                                                         $expiryFormOptions->getHTML() .
 440                                                 "</td>
 441                                         </tr></table>";
 442                         }
 443                         # Add custom expiry field
 444                         $attribs = [ 'id' => "mwProtect-$action-expires" ] + $this->disabledAttrib;
 445                         $out .= "<table><tr>
 446                                         <td class='mw-label'>" .
 447                                                 $mProtectother .
 448                                         '</td>
 449                                         <td class="mw-input">' .
 450                                                 Xml::input( "mwProtect-expiry-$action", 50, $this->mExpiry[$action], $attribs ) .
 451                                         '</td>
 452                                 </tr></table>';
 453                         $out .= "</td></tr>" .
 454                         Xml::closeElement( 'table' ) .
 455                         Xml::closeElement( 'fieldset' ) .
 456                         "</td></tr>";
 457                 }
 458                 # Give extensions a chance to add items to the form
 459                 Hooks::run( 'ProtectionForm::buildForm', [ $this->mArticle, &$out ] );
 460
 461                 $out .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
 462
 463                 // JavaScript will add another row with a value-chaining checkbox
 464                 if ( $this->mTitle->exists() ) {
 465                         $out .= Xml::openElement( 'table', [ 'id' => 'mw-protect-table2' ] ) .
 466                                 Xml::openElement( 'tbody' );
 467                         $out .= '<tr>
 468                                         <td></td>
 469                                         <td class="mw-input">' .
 470                                                 Xml::checkLabel(
 471                                                         $context->msg( 'protect-cascade' )->text(),
 472                                                         'mwProtect-cascade',
 473                                                         'mwProtect-cascade',
 474                                                         $this->mCascade, $this->disabledAttrib
 475                                                 ) .
 476                                         "</td>
 477                                 </tr>\n";
 478                         $out .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
 479                 }
 480
 481                 # Add manual and custom reason field/selects as well as submit
 482                 if ( !$this->disabled ) {
 483                         $mProtectreasonother = Xml::label(
 484                                 $context->msg( 'protectcomment' )->text(),
 485                                 'wpProtectReasonSelection'
 486                         );
 487
 488                         $mProtectreason = Xml::label(
 489                                 $context->msg( 'protect-otherreason' )->text(),
 490                                 'mwProtect-reason'
 491                         );
 492
 493                         $reasonDropDown = Xml::listDropDown( 'wpProtectReasonSelection',
 494                                 wfMessage( 'protect-dropdown' )->inContentLanguage()->text(),
 495                                 wfMessage( 'protect-otherreason-op' )->inContentLanguage()->text(),
 496                                 $this->mReasonSelection,
 497                                 'mwProtect-reason', 4 );
 498
 499                         // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
 500                         // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
 501                         // Unicode codepoints (or 180 UTF-8 bytes for old schema).
 502                         // Subtract arbitrary 75 to leave some space for the autogenerated null edit's summary
 503                         // and other texts chosen by dropdown menus on this page.
 504                         $maxlength = $oldCommentSchema ? 180 : CommentStore::COMMENT_CHARACTER_LIMIT - 75;
 505
 506                         $out .= Xml::openElement( 'table', [ 'id' => 'mw-protect-table3' ] ) .
 507                                 Xml::openElement( 'tbody' );
 508                         $out .= "
 509                                 <tr>
 510                                         <td class='mw-label'>
 511                                                 {$mProtectreasonother}
 512                                         </td>
 513                                         <td class='mw-input'>
 514                                                 {$reasonDropDown}
 515                                         </td>
 516                                 </tr>
 517                                 <tr>
 518                                         <td class='mw-label'>
 519                                                 {$mProtectreason}
 520                                         </td>
 521                                         <td class='mw-input'>" .
 522                                                 Xml::input( 'mwProtect-reason', 60, $this->mReason, [ 'type' => 'text',
 523                                                         'id' => 'mwProtect-reason', 'maxlength' => $maxlength ] ) .
 524                                         "</td>
 525                                 </tr>";
 526                         # Disallow watching is user is not logged in
 527                         if ( $user->isLoggedIn() ) {
 528                                 $out .= "
 529                                 <tr>
 530                                         <td></td>
 531                                         <td class='mw-input'>" .
 532                                                 Xml::checkLabel( $context->msg( 'watchthis' )->text(),
 533                                                         'mwProtectWatch', 'mwProtectWatch',
 534                                                         $user->isWatched( $this->mTitle ) || $user->getOption( 'watchdefault' ) ) .
 535                                         "</td>
 536                                 </tr>";
 537                         }
 538                         $out .= "
 539                                 <tr>
 540                                         <td></td>
 541                                         <td class='mw-submit'>" .
 542                                                 Xml::submitButton(
 543                                                         $context->msg( 'confirm' )->text(),
 544                                                         [ 'id' => 'mw-Protect-submit' ]
 545                                                 ) .
 546                                         "</td>
 547                                 </tr>\n";
 548                         $out .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
 549                 }
 550                 $out .= Xml::closeElement( 'fieldset' );
 551
 552                 if ( $user->isAllowed( 'editinterface' ) ) {
 553                         $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
 554                         $link = $linkRenderer->makeKnownLink(
 555                                 $context->msg( 'protect-dropdown' )->inContentLanguage()->getTitle(),
 556                                 $context->msg( 'protect-edit-reasonlist' )->text(),
 557                                 [],
 558                                 [ 'action' => 'edit' ]
 559                         );
 560                         $out .= '<p class="mw-protect-editreasons">' . $link . '</p>';
 561                 }
 562
 563                 if ( !$this->disabled ) {
 564                         $out .= Html::hidden(
 565                                 'wpEditToken',
 566                                 $user->getEditToken( [ 'protect', $this->mTitle->getPrefixedDBkey() ] )
 567                         );
 568                         $out .= Xml::closeElement( 'form' );
 569                 }
 570
 571                 return $out;
 572         }
 573
 574         /**
 575          * Build protection level selector
 576          *
 577          * @param string $action Action to protect
 578          * @param string $selected Current protection level
 579          * @return string HTML fragment
 580          */
 581         function buildSelector( $action, $selected ) {
 582                 // If the form is disabled, display all relevant levels. Otherwise,
 583                 // just show the ones this user can use.
 584                 $levels = MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace(),
 585                         $this->disabled ? null : $this->mContext->getUser()
 586                 );
 587
 588                 $id = 'mwProtect-level-' . $action;
 589
 590                 $select = new XmlSelect( $id, $id, $selected );
 591                 $select->setAttribute( 'size', count( $levels ) );
 592                 if ( $this->disabled ) {
 593                         $select->setAttribute( 'disabled', 'disabled' );
 594                 }
 595
 596                 foreach ( $levels as $key ) {
 597                         $select->addOption( $this->getOptionLabel( $key ), $key );
 598                 }
 599
 600                 return $select->getHTML();
 601         }
 602
 603         /**
 604          * Prepare the label for a protection selector option
 605          *
 606          * @param string $permission Permission required
 607          * @return string
 608          */
 609         private function getOptionLabel( $permission ) {
 610                 if ( $permission == '' ) {
 611                         return $this->mContext->msg( 'protect-default' )->text();
 612                 } else {
 613                         // Messages: protect-level-autoconfirmed, protect-level-sysop
 614                         $msg = $this->mContext->msg( "protect-level-{$permission}" );
 615                         if ( $msg->exists() ) {
 616                                 return $msg->text();
 617                         }
 618                         return $this->mContext->msg( 'protect-fallback', $permission )->text();
 619                 }
 620         }
 621
 622         /**
 623          * Show protection long extracts for this page
 624          *
 625          * @param OutputPage &$out
 626          * @access private
 627          */
 628         function showLogExtract( &$out ) {
 629                 # Show relevant lines from the protection log:
 630                 $protectLogPage = new LogPage( 'protect' );
 631                 $out->addHTML( Xml::element( 'h2', null, $protectLogPage->getName()->text() ) );
 632                 LogEventsList::showLogExtract( $out, 'protect', $this->mTitle );
 633                 # Let extensions add other relevant log extracts
 634                 Hooks::run( 'ProtectionForm::showLogExtract', [ $this->mArticle, $out ] );
 635         }
 636 }