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         /** A map of action to restriction level, from request or default */
  31         var $mRestrictions = array();
  32
  33         /** The custom/additional protection reason */
  34         var $mReason = '';
  35
  36         /** The reason selected from the list, blank for other/additional */
  37         var $mReasonSelection = '';
  38
  39         /** True if the restrictions are cascading, from request or existing protection */
  40         var $mCascade = false;
  41
  42         /** Map of action to "other" expiry time. Used in preference to mExpirySelection. */
  43         var $mExpiry = array();
  44
  45         /**
  46          * Map of action to value selected in expiry drop-down list.
  47          * Will be set to 'othertime' whenever mExpiry is set.
  48          */
  49         var $mExpirySelection = array();
  50
  51         /** Permissions errors for the protect action */
  52         var $mPermErrors = array();
  53
  54         /** Types (i.e. actions) for which levels can be selected */
  55         var $mApplicableTypes = array();
  56
  57         /** Map of action to the expiry time of the existing protection */
  58         var $mExistingExpiry = array();
  59
  60         function __construct( Page $article ) {
  61                 global $wgUser;
  62                 // Set instance variables.
  63                 $this->mArticle = $article;
  64                 $this->mTitle = $article->getTitle();
  65                 $this->mApplicableTypes = $this->mTitle->getRestrictionTypes();
  66
  67                 // Check if the form should be disabled.
  68                 // If it is, the form will be available in read-only to show levels.
  69                 $this->mPermErrors = $this->mTitle->getUserPermissionsErrors( 'protect', $wgUser );
  70                 if ( wfReadOnly() ) {
  71                         $this->mPermErrors[] = array( 'readonlytext', wfReadOnlyReason() );
  72                 }
  73                 $this->disabled = $this->mPermErrors != array();
  74                 $this->disabledAttrib = $this->disabled
  75                         ? array( 'disabled' => 'disabled' )
  76                         : array();
  77
  78                 $this->loadData();
  79         }
  80
  81         /**
  82          * Loads the current state of protection into the object.
  83          */
  84         function loadData() {
  85                 global $wgRequest, $wgUser;
  86
  87                 $levels = MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace(), $wgUser );
  88                 $this->mCascade = $this->mTitle->areRestrictionsCascading();
  89
  90                 $this->mReason = $wgRequest->getText( 'mwProtect-reason' );
  91                 $this->mReasonSelection = $wgRequest->getText( 'wpProtectReasonSelection' );
  92                 $this->mCascade = $wgRequest->getBool( 'mwProtect-cascade', $this->mCascade );
  93
  94                 foreach ( $this->mApplicableTypes as $action ) {
  95                         // @todo FIXME: This form currently requires individual selections,
  96                         // but the db allows multiples separated by commas.
  97
  98                         // Pull the actual restriction from the DB
  99                         $this->mRestrictions[$action] = implode( '', $this->mTitle->getRestrictions( $action ) );
 100
 101                         if ( !$this->mRestrictions[$action] ) {
 102                                 // No existing expiry
 103                                 $existingExpiry = '';
 104                         } else {
 105                                 $existingExpiry = $this->mTitle->getRestrictionExpiry( $action );
 106                         }
 107                         $this->mExistingExpiry[$action] = $existingExpiry;
 108
 109                         $requestExpiry = $wgRequest->getText( "mwProtect-expiry-$action" );
 110                         $requestExpirySelection = $wgRequest->getVal( "wpProtectExpirySelection-$action" );
 111
 112                         if ( $requestExpiry ) {
 113                                 // Custom expiry takes precedence
 114                                 $this->mExpiry[$action] = $requestExpiry;
 115                                 $this->mExpirySelection[$action] = 'othertime';
 116                         } elseif ( $requestExpirySelection ) {
 117                                 // Expiry selected from list
 118                                 $this->mExpiry[$action] = '';
 119                                 $this->mExpirySelection[$action] = $requestExpirySelection;
 120                         } elseif ( $existingExpiry == 'infinity' ) {
 121                                 // Existing expiry is infinite, use "infinite" in drop-down
 122                                 $this->mExpiry[$action] = '';
 123                                 $this->mExpirySelection[$action] = 'infinite';
 124                         } elseif ( $existingExpiry ) {
 125                                 // Use existing expiry in its own list item
 126                                 $this->mExpiry[$action] = '';
 127                                 $this->mExpirySelection[$action] = $existingExpiry;
 128                         } else {
 129                                 // Final default: infinite
 130                                 $this->mExpiry[$action] = '';
 131                                 $this->mExpirySelection[$action] = 'infinite';
 132                         }
 133
 134                         $val = $wgRequest->getVal( "mwProtect-level-$action" );
 135                         if ( isset( $val ) && in_array( $val, $levels ) ) {
 136                                 $this->mRestrictions[$action] = $val;
 137                         }
 138                 }
 139         }
 140
 141         /**
 142          * Get the expiry time for a given action, by combining the relevant inputs.
 143          *
 144          * @param $action string
 145          *
 146          * @return string 14-char timestamp or "infinity", or false if the input was invalid
 147          */
 148         function getExpiry( $action ) {
 149                 if ( $this->mExpirySelection[$action] == 'existing' ) {
 150                         return $this->mExistingExpiry[$action];
 151                 } elseif ( $this->mExpirySelection[$action] == 'othertime' ) {
 152                         $value = $this->mExpiry[$action];
 153                 } else {
 154                         $value = $this->mExpirySelection[$action];
 155                 }
 156                 if ( $value == 'infinite' || $value == 'indefinite' || $value == 'infinity' ) {
 157                         $time = wfGetDB( DB_SLAVE )->getInfinity();
 158                 } else {
 159                         $unix = strtotime( $value );
 160
 161                         if ( !$unix || $unix === -1 ) {
 162                                 return false;
 163                         }
 164
 165                         // @todo FIXME: Non-qualified absolute times are not in users specified timezone
 166                         // and there isn't notice about it in the ui
 167                         $time = wfTimestamp( TS_MW, $unix );
 168                 }
 169                 return $time;
 170         }
 171
 172         /**
 173          * Main entry point for action=protect and action=unprotect
 174          */
 175         function execute() {
 176                 global $wgRequest, $wgOut;
 177
 178                 if ( MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) === array( '' ) ) {
 179                         throw new ErrorPageError( 'protect-badnamespace-title', 'protect-badnamespace-text' );
 180                 }
 181
 182                 if ( $wgRequest->wasPosted() ) {
 183                         if ( $this->save() ) {
 184                                 $q = $this->mArticle->isRedirect() ? 'redirect=no' : '';
 185                                 $wgOut->redirect( $this->mTitle->getFullURL( $q ) );
 186                         }
 187                 } else {
 188                         $this->show();
 189                 }
 190         }
 191
 192         /**
 193          * Show the input form with optional error message
 194          *
 195          * @param string $err error message or null if there's no error
 196          */
 197         function show( $err = null ) {
 198                 global $wgOut;
 199
 200                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 201                 $wgOut->addBacklinkSubtitle( $this->mTitle );
 202
 203                 if ( is_array( $err ) ) {
 204                         $wgOut->wrapWikiMsg( "<p class='error'>\n$1\n</p>\n", $err );
 205                 } elseif ( is_string( $err ) ) {
 206                         $wgOut->addHTML( "<p class='error'>{$err}</p>\n" );
 207                 }
 208
 209                 if ( $this->mTitle->getRestrictionTypes() === array() ) {
 210                         // No restriction types available for the current title
 211                         // this might happen if an extension alters the available types
 212                         $wgOut->setPageTitle( wfMessage( 'protect-norestrictiontypes-title', $this->mTitle->getPrefixedText() ) );
 213                         $wgOut->addWikiText( wfMessage( 'protect-norestrictiontypes-text' )->text() );
 214
 215                         // Show the log in case protection was possible once
 216                         $this->showLogExtract( $wgOut );
 217                         // return as there isn't anything else we can do
 218                         return;
 219                 }
 220
 221                 list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
 222                 if ( $cascadeSources && count( $cascadeSources ) > 0 ) {
 223                         $titles = '';
 224
 225                         foreach ( $cascadeSources as $title ) {
 226                                 $titles .= '* [[:' . $title->getPrefixedText() . "]]\n";
 227                         }
 228
 229                         $wgOut->wrapWikiMsg( "<div id=\"mw-protect-cascadeon\">\n$1\n" . $titles . "</div>", array( 'protect-cascadeon', count( $cascadeSources ) ) );
 230                 }
 231
 232                 # Show an appropriate message if the user isn't allowed or able to change
 233                 # the protection settings at this time
 234                 if ( $this->disabled ) {
 235                         $wgOut->setPageTitle( wfMessage( 'protect-title-notallowed', $this->mTitle->getPrefixedText() ) );
 236                         $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $this->mPermErrors, 'protect' ) );
 237                 } else {
 238                         $wgOut->setPageTitle( wfMessage( 'protect-title', $this->mTitle->getPrefixedText() ) );
 239                         $wgOut->addWikiMsg( 'protect-text',
 240                                 wfEscapeWikiText( $this->mTitle->getPrefixedText() ) );
 241                 }
 242
 243                 $wgOut->addHTML( $this->buildForm() );
 244                 $this->showLogExtract( $wgOut );
 245         }
 246
 247         /**
 248          * Save submitted protection form
 249          *
 250          * @return Boolean: success
 251          */
 252         function save() {
 253                 global $wgRequest, $wgUser, $wgOut;
 254
 255                 # Permission check!
 256                 if ( $this->disabled ) {
 257                         $this->show();
 258                         return false;
 259                 }
 260
 261                 $token = $wgRequest->getVal( 'wpEditToken' );
 262                 if ( !$wgUser->matchEditToken( $token, array( 'protect', $this->mTitle->getPrefixedDBkey() ) ) ) {
 263                         $this->show( array( 'sessionfailure' ) );
 264                         return false;
 265                 }
 266
 267                 # Create reason string. Use list and/or custom string.
 268                 $reasonstr = $this->mReasonSelection;
 269                 if ( $reasonstr != 'other' && $this->mReason != '' ) {
 270                         // Entry from drop down menu + additional comment
 271                         $reasonstr .= wfMessage( 'colon-separator' )->text() . $this->mReason;
 272                 } elseif ( $reasonstr == 'other' ) {
 273                         $reasonstr = $this->mReason;
 274                 }
 275                 $expiry = array();
 276                 foreach ( $this->mApplicableTypes as $action ) {
 277                         $expiry[$action] = $this->getExpiry( $action );
 278                         if ( empty( $this->mRestrictions[$action] ) ) {
 279                                 continue; // unprotected
 280                         }
 281                         if ( !$expiry[$action] ) {
 282                                 $this->show( array( 'protect_expiry_invalid' ) );
 283                                 return false;
 284                         }
 285                         if ( $expiry[$action] < wfTimestampNow() ) {
 286                                 $this->show( array( 'protect_expiry_old' ) );
 287                                 return false;
 288                         }
 289                 }
 290
 291                 $this->mCascade = $wgRequest->getBool( 'mwProtect-cascade' );
 292
 293                 $status = $this->mArticle->doUpdateRestrictions( $this->mRestrictions, $expiry, $this->mCascade, $reasonstr, $wgUser );
 294
 295                 if ( !$status->isOK() ) {
 296                         $this->show( $wgOut->parseInline( $status->getWikiText() ) );
 297                         return false;
 298                 }
 299
 300                 /**
 301                  * Give extensions a change to handle added form items
 302                  *
 303                  * @since 1.19 you can (and you should) return false to abort saving;
 304                  *             you can also return an array of message name and its parameters
 305                  */
 306                 $errorMsg = '';
 307                 if ( !wfRunHooks( 'ProtectionForm::save', array( $this->mArticle, &$errorMsg, $reasonstr ) ) ) {
 308                         if ( $errorMsg == '' ) {
 309                                 $errorMsg = array( 'hookaborted' );
 310                         }
 311                 }
 312                 if ( $errorMsg != '' ) {
 313                         $this->show( $errorMsg );
 314                         return false;
 315                 }
 316
 317                 WatchAction::doWatchOrUnwatch( $wgRequest->getCheck( 'mwProtectWatch' ), $this->mTitle, $wgUser );
 318
 319                 return true;
 320         }
 321
 322         /**
 323          * Build the input form
 324          *
 325          * @return String: HTML form
 326          */
 327         function buildForm() {
 328                 global $wgUser, $wgLang, $wgOut;
 329
 330                 $mProtectreasonother = Xml::label(
 331                         wfMessage( 'protectcomment' )->text(),
 332                         'wpProtectReasonSelection'
 333                 );
 334                 $mProtectreason = Xml::label(
 335                         wfMessage( 'protect-otherreason' )->text(),
 336                         'mwProtect-reason'
 337                 );
 338
 339                 $out = '';
 340                 if ( !$this->disabled ) {
 341                         $wgOut->addModules( 'mediawiki.legacy.protect' );
 342                         $out .= Xml::openElement( 'form', array( 'method' => 'post',
 343                                 'action' => $this->mTitle->getLocalURL( 'action=protect' ),
 344                                 'id' => 'mw-Protect-Form', 'onsubmit' => 'ProtectionForm.enableUnchainedInputs(true)' ) );
 345                 }
 346
 347                 $out .= Xml::openElement( 'fieldset' ) .
 348                         Xml::element( 'legend', null, wfMessage( 'protect-legend' )->text() ) .
 349                         Xml::openElement( 'table', array( 'id' => 'mwProtectSet' ) ) .
 350                         Xml::openElement( 'tbody' );
 351
 352                 // Not all languages have V_x <-> N_x relation
 353                 foreach ( $this->mRestrictions as $action => $selected ) {
 354                         // Messages:
 355                         // restriction-edit, restriction-move, restriction-create, restriction-upload
 356                         $msg = wfMessage( 'restriction-' . $action );
 357                         $out .= "<tr><td>" .
 358                         Xml::openElement( 'fieldset' ) .
 359                         Xml::element( 'legend', null, $msg->exists() ? $msg->text() : $action ) .
 360                         Xml::openElement( 'table', array( 'id' => "mw-protect-table-$action" ) ) .
 361                                 "<tr><td>" . $this->buildSelector( $action, $selected ) . "</td></tr><tr><td>";
 362
 363                         $reasonDropDown = Xml::listDropDown( 'wpProtectReasonSelection',
 364                                 wfMessage( 'protect-dropdown' )->inContentLanguage()->text(),
 365                                 wfMessage( 'protect-otherreason-op' )->inContentLanguage()->text(),
 366                                 $this->mReasonSelection,
 367                                 'mwProtect-reason', 4 );
 368                         $scExpiryOptions = wfMessage( 'protect-expiry-options' )->inContentLanguage()->text();
 369
 370                         $showProtectOptions = $scExpiryOptions !== '-' && !$this->disabled;
 371
 372                         $mProtectexpiry = Xml::label(
 373                                 wfMessage( 'protectexpiry' )->text(),
 374                                 "mwProtectExpirySelection-$action"
 375                         );
 376                         $mProtectother = Xml::label(
 377                                 wfMessage( 'protect-othertime' )->text(),
 378                                 "mwProtect-$action-expires"
 379                         );
 380
 381                         $expiryFormOptions = '';
 382                         if ( $this->mExistingExpiry[$action] && $this->mExistingExpiry[$action] != 'infinity' ) {
 383                                 $timestamp = $wgLang->timeanddate( $this->mExistingExpiry[$action], true );
 384                                 $d = $wgLang->date( $this->mExistingExpiry[$action], true );
 385                                 $t = $wgLang->time( $this->mExistingExpiry[$action], true );
 386                                 $expiryFormOptions .=
 387                                         Xml::option(
 388                                                 wfMessage( 'protect-existing-expiry', $timestamp, $d, $t )->text(),
 389                                                 'existing',
 390                                                 $this->mExpirySelection[$action] == 'existing'
 391                                         ) . "\n";
 392                         }
 393
 394                         $expiryFormOptions .= Xml::option(
 395                                 wfMessage( 'protect-othertime-op' )->text(),
 396                                 "othertime"
 397                         ) . "\n";
 398                         foreach ( explode( ',', $scExpiryOptions ) as $option ) {
 399                                 if ( strpos( $option, ":" ) === false ) {
 400                                         $show = $value = $option;
 401                                 } else {
 402                                         list( $show, $value ) = explode( ":", $option );
 403                                 }
 404                                 $show = htmlspecialchars( $show );
 405                                 $value = htmlspecialchars( $value );
 406                                 $expiryFormOptions .= Xml::option( $show, $value, $this->mExpirySelection[$action] === $value ) . "\n";
 407                         }
 408                         # Add expiry dropdown
 409                         if ( $showProtectOptions && !$this->disabled ) {
 410                                 $out .= "
 411                                         <table><tr>
 412                                                 <td class='mw-label'>
 413                                                         {$mProtectexpiry}
 414                                                 </td>
 415                                                 <td class='mw-input'>" .
 416                                                         Xml::tags( 'select',
 417                                                                 array(
 418                                                                         'id' => "mwProtectExpirySelection-$action",
 419                                                                         'name' => "wpProtectExpirySelection-$action",
 420                                                                         'onchange' => "ProtectionForm.updateExpiryList(this)",
 421                                                                         'tabindex' => '2' ) + $this->disabledAttrib,
 422                                                                 $expiryFormOptions ) .
 423                                                 "</td>
 424                                         </tr></table>";
 425                         }
 426                         # Add custom expiry field
 427                         $attribs = array( 'id' => "mwProtect-$action-expires",
 428                                 'onkeyup' => 'ProtectionForm.updateExpiry(this)',
 429                                 'onchange' => 'ProtectionForm.updateExpiry(this)' ) + $this->disabledAttrib;
 430                         $out .= "<table><tr>
 431                                         <td class='mw-label'>" .
 432                                                 $mProtectother .
 433                                         '</td>
 434                                         <td class="mw-input">' .
 435                                                 Xml::input( "mwProtect-expiry-$action", 50, $this->mExpiry[$action], $attribs ) .
 436                                         '</td>
 437                                 </tr></table>';
 438                         $out .= "</td></tr>" .
 439                         Xml::closeElement( 'table' ) .
 440                         Xml::closeElement( 'fieldset' ) .
 441                         "</td></tr>";
 442                 }
 443                 # Give extensions a chance to add items to the form
 444                 wfRunHooks( 'ProtectionForm::buildForm', array( $this->mArticle, &$out ) );
 445
 446                 $out .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
 447
 448                 // JavaScript will add another row with a value-chaining checkbox
 449                 if ( $this->mTitle->exists() ) {
 450                         $out .= Xml::openElement( 'table', array( 'id' => 'mw-protect-table2' ) ) .
 451                                 Xml::openElement( 'tbody' );
 452                         $out .= '<tr>
 453                                         <td></td>
 454                                         <td class="mw-input">' .
 455                                                 Xml::checkLabel(
 456                                                         wfMessage( 'protect-cascade' )->text(),
 457                                                         'mwProtect-cascade',
 458                                                         'mwProtect-cascade',
 459                                                         $this->mCascade, $this->disabledAttrib
 460                                                 ) .
 461                                         "</td>
 462                                 </tr>\n";
 463                         $out .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
 464                 }
 465
 466                 # Add manual and custom reason field/selects as well as submit
 467                 if ( !$this->disabled ) {
 468                         $out .= Xml::openElement( 'table', array( 'id' => 'mw-protect-table3' ) ) .
 469                                 Xml::openElement( 'tbody' );
 470                         $out .= "
 471                                 <tr>
 472                                         <td class='mw-label'>
 473                                                 {$mProtectreasonother}
 474                                         </td>
 475                                         <td class='mw-input'>
 476                                                 {$reasonDropDown}
 477                                         </td>
 478                                 </tr>
 479                                 <tr>
 480                                         <td class='mw-label'>
 481                                                 {$mProtectreason}
 482                                         </td>
 483                                         <td class='mw-input'>" .
 484                                                 Xml::input( 'mwProtect-reason', 60, $this->mReason, array( 'type' => 'text',
 485                                                         'id' => 'mwProtect-reason', 'maxlength' => 180 ) ) .
 486                                                         // Limited maxlength as the database trims at 255 bytes and other texts
 487                                                         // chosen by dropdown menus on this page are also included in this database field.
 488                                                         // The byte limit of 180 bytes is enforced in javascript
 489                                         "</td>
 490                                 </tr>";
 491                         # Disallow watching is user is not logged in
 492                         if ( $wgUser->isLoggedIn() ) {
 493                                 $out .= "
 494                                 <tr>
 495                                         <td></td>
 496                                         <td class='mw-input'>" .
 497                                                 Xml::checkLabel( wfMessage( 'watchthis' )->text(),
 498                                                         'mwProtectWatch', 'mwProtectWatch',
 499                                                         $wgUser->isWatched( $this->mTitle ) || $wgUser->getOption( 'watchdefault' ) ) .
 500                                         "</td>
 501                                 </tr>";
 502                         }
 503                         $out .= "
 504                                 <tr>
 505                                         <td></td>
 506                                         <td class='mw-submit'>" .
 507                                                 Xml::submitButton(
 508                                                         wfMessage( 'confirm' )->text(),
 509                                                         array( 'id' => 'mw-Protect-submit' )
 510                                                 ) .
 511                                         "</td>
 512                                 </tr>\n";
 513                         $out .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
 514                 }
 515                 $out .= Xml::closeElement( 'fieldset' );
 516
 517                 if ( $wgUser->isAllowed( 'editinterface' ) ) {
 518                         $title = Title::makeTitle( NS_MEDIAWIKI, 'Protect-dropdown' );
 519                         $link = Linker::link(
 520                                 $title,
 521                                 wfMessage( 'protect-edit-reasonlist' )->escaped(),
 522                                 array(),
 523                                 array( 'action' => 'edit' )
 524                         );
 525                         $out .= '<p class="mw-protect-editreasons">' . $link . '</p>';
 526                 }
 527
 528                 if ( !$this->disabled ) {
 529                         $out .= Html::hidden( 'wpEditToken', $wgUser->getEditToken( array( 'protect', $this->mTitle->getPrefixedDBkey() ) ) );
 530                         $out .= Xml::closeElement( 'form' );
 531                         $wgOut->addScript( $this->buildCleanupScript() );
 532                 }
 533
 534                 return $out;
 535         }
 536
 537         /**
 538          * Build protection level selector
 539          *
 540          * @param string $action action to protect
 541          * @param string $selected current protection level
 542          * @return String: HTML fragment
 543          */
 544         function buildSelector( $action, $selected ) {
 545                 global $wgUser;
 546
 547                 // If the form is disabled, display all relevant levels. Otherwise,
 548                 // just show the ones this user can use.
 549                 $levels = MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace(),
 550                         $this->disabled ? null : $wgUser
 551                 );
 552
 553                 $id = 'mwProtect-level-' . $action;
 554                 $attribs = array(
 555                         'id' => $id,
 556                         'name' => $id,
 557                         'size' => count( $levels ),
 558                         'onchange' => 'ProtectionForm.updateLevels(this)',
 559                         ) + $this->disabledAttrib;
 560
 561                 $out = Xml::openElement( 'select', $attribs );
 562                 foreach ( $levels as $key ) {
 563                         $out .= Xml::option( $this->getOptionLabel( $key ), $key, $key == $selected );
 564                 }
 565                 $out .= Xml::closeElement( 'select' );
 566                 return $out;
 567         }
 568
 569         /**
 570          * Prepare the label for a protection selector option
 571          *
 572          * @param string $permission permission required
 573          * @return String
 574          */
 575         private function getOptionLabel( $permission ) {
 576                 if ( $permission == '' ) {
 577                         return wfMessage( 'protect-default' )->text();
 578                 } else {
 579                         // Messages: protect-level-autoconfirmed, protect-level-sysop
 580                         $msg = wfMessage( "protect-level-{$permission}" );
 581                         if ( $msg->exists() ) {
 582                                 return $msg->text();
 583                         }
 584                         return wfMessage( 'protect-fallback', $permission )->text();
 585                 }
 586         }
 587
 588         function buildCleanupScript() {
 589                 global $wgCascadingRestrictionLevels, $wgOut;
 590
 591                 $cascadeableLevels = $wgCascadingRestrictionLevels;
 592                 $options = array(
 593                         'tableId' => 'mwProtectSet',
 594                         'labelText' => wfMessage( 'protect-unchain-permissions' )->plain(),
 595                         'numTypes' => count( $this->mApplicableTypes ),
 596                         'existingMatch' => count( array_unique( $this->mExistingExpiry ) ) === 1,
 597                 );
 598
 599                 $wgOut->addJsConfigVars( 'wgCascadeableLevels', $cascadeableLevels );
 600                 $script = Xml::encodeJsCall( 'ProtectionForm.init', array( $options ) );
 601                 return Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) );
 602         }
 603
 604         /**
 605          * Show protection long extracts for this page
 606          *
 607          * @param $out OutputPage
 608          * @access private
 609          */
 610         function showLogExtract( &$out ) {
 611                 # Show relevant lines from the protection log:
 612                 $protectLogPage = new LogPage( 'protect' );
 613                 $out->addHTML( Xml::element( 'h2', null, $protectLogPage->getName()->text() ) );
 614                 LogEventsList::showLogExtract( $out, 'protect', $this->mTitle );
 615                 # Let extensions add other relevant log extracts
 616                 wfRunHooks( 'ProtectionForm::showLogExtract', array( $this->mArticle, $out ) );
 617         }
 618 }