includes/ProtectionForm.php

   1 <?php
   2 /**
   3  * Page protection
   4  *
   5  * Copyright © 2005 Brion Vibber <brion@pobox.com>
   6  * http://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                 global $wgRestrictionLevels;
  87
  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, $wgRestrictionLevels ) ) {
 136                                 // Prevent users from setting levels that they cannot later unset
 137                                 if ( $val == 'sysop' ) {
 138                                         // Special case, rewrite sysop to either protect and editprotected
 139                                         if ( !$wgUser->isAllowedAny( 'protect', 'editprotected' ) ) {
 140                                                 continue;
 141                                         }
 142                                 } elseif ( !$wgUser->isAllowed( $val ) ) {
 143                                         continue;
 144                                 }
 145                                 $this->mRestrictions[$action] = $val;
 146                         }
 147                 }
 148         }
 149
 150         /**
 151          * Get the expiry time for a given action, by combining the relevant inputs.
 152          *
 153          * @param $action string
 154          *
 155          * @return string 14-char timestamp or "infinity", or false if the input was invalid
 156          */
 157         function getExpiry( $action ) {
 158                 if ( $this->mExpirySelection[$action] == 'existing' ) {
 159                         return $this->mExistingExpiry[$action];
 160                 } elseif ( $this->mExpirySelection[$action] == 'othertime' ) {
 161                         $value = $this->mExpiry[$action];
 162                 } else {
 163                         $value = $this->mExpirySelection[$action];
 164                 }
 165                 if ( $value == 'infinite' || $value == 'indefinite' || $value == 'infinity' ) {
 166                         $time = wfGetDB( DB_SLAVE )->getInfinity();
 167                 } else {
 168                         $unix = strtotime( $value );
 169
 170                         if ( !$unix || $unix === -1 ) {
 171                                 return false;
 172                         }
 173
 174                         // @todo FIXME: Non-qualified absolute times are not in users specified timezone
 175                         // and there isn't notice about it in the ui
 176                         $time = wfTimestamp( TS_MW, $unix );
 177                 }
 178                 return $time;
 179         }
 180
 181         /**
 182          * Main entry point for action=protect and action=unprotect
 183          */
 184         function execute() {
 185                 global $wgRequest, $wgOut;
 186
 187                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 188                         throw new ErrorPageError( 'protect-badnamespace-title', 'protect-badnamespace-text' );
 189                 }
 190
 191                 if ( $wgRequest->wasPosted() ) {
 192                         if ( $this->save() ) {
 193                                 $q = $this->mArticle->isRedirect() ? 'redirect=no' : '';
 194                                 $wgOut->redirect( $this->mTitle->getFullURL( $q ) );
 195                         }
 196                 } else {
 197                         $this->show();
 198                 }
 199         }
 200
 201         /**
 202          * Show the input form with optional error message
 203          *
 204          * @param string $err error message or null if there's no error
 205          */
 206         function show( $err = null ) {
 207                 global $wgOut;
 208
 209                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 210                 $wgOut->addBacklinkSubtitle( $this->mTitle );
 211
 212                 if ( is_array( $err ) ) {
 213                         $wgOut->wrapWikiMsg( "<p class='error'>\n$1\n</p>\n", $err );
 214                 } elseif ( is_string( $err ) ) {
 215                         $wgOut->addHTML( "<p class='error'>{$err}</p>\n" );
 216                 }
 217
 218                 if ( $this->mTitle->getRestrictionTypes() === array() ) {
 219                         // No restriction types available for the current title
 220                         // this might happen if an extension alters the available types
 221                         $wgOut->setPageTitle( wfMessage( 'protect-norestrictiontypes-title', $this->mTitle->getPrefixedText() ) );
 222                         $wgOut->addWikiText( wfMessage( 'protect-norestrictiontypes-text' )->text() );
 223
 224                         // Show the log in case protection was possible once
 225                         $this->showLogExtract( $wgOut );
 226                         // return as there isn't anything else we can do
 227                         return;
 228                 }
 229
 230                 list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
 231                 if ( $cascadeSources && count( $cascadeSources ) > 0 ) {
 232                         $titles = '';
 233
 234                         foreach ( $cascadeSources as $title ) {
 235                                 $titles .= '* [[:' . $title->getPrefixedText() . "]]\n";
 236                         }
 237
 238                         $wgOut->wrapWikiMsg( "<div id=\"mw-protect-cascadeon\">\n$1\n" . $titles . "</div>", array( 'protect-cascadeon', count( $cascadeSources ) ) );
 239                 }
 240
 241                 # Show an appropriate message if the user isn't allowed or able to change
 242                 # the protection settings at this time
 243                 if ( $this->disabled ) {
 244                         $wgOut->setPageTitle( wfMessage( 'protect-title-notallowed', $this->mTitle->getPrefixedText() ) );
 245                         $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $this->mPermErrors, 'protect' ) );
 246                 } else {
 247                         $wgOut->setPageTitle( wfMessage( 'protect-title', $this->mTitle->getPrefixedText() ) );
 248                         $wgOut->addWikiMsg( 'protect-text',
 249                                 wfEscapeWikiText( $this->mTitle->getPrefixedText() ) );
 250                 }
 251
 252                 $wgOut->addHTML( $this->buildForm() );
 253                 $this->showLogExtract( $wgOut );
 254         }
 255
 256         /**
 257          * Save submitted protection form
 258          *
 259          * @return Boolean: success
 260          */
 261         function save() {
 262                 global $wgRequest, $wgUser, $wgOut;
 263
 264                 # Permission check!
 265                 if ( $this->disabled ) {
 266                         $this->show();
 267                         return false;
 268                 }
 269
 270                 $token = $wgRequest->getVal( 'wpEditToken' );
 271                 if ( !$wgUser->matchEditToken( $token, array( 'protect', $this->mTitle->getPrefixedDBkey() ) ) ) {
 272                         $this->show( array( 'sessionfailure' ) );
 273                         return false;
 274                 }
 275
 276                 # Create reason string. Use list and/or custom string.
 277                 $reasonstr = $this->mReasonSelection;
 278                 if ( $reasonstr != 'other' && $this->mReason != '' ) {
 279                         // Entry from drop down menu + additional comment
 280                         $reasonstr .= wfMessage( 'colon-separator' )->text() . $this->mReason;
 281                 } elseif ( $reasonstr == 'other' ) {
 282                         $reasonstr = $this->mReason;
 283                 }
 284                 $expiry = array();
 285                 foreach ( $this->mApplicableTypes as $action ) {
 286                         $expiry[$action] = $this->getExpiry( $action );
 287                         if ( empty( $this->mRestrictions[$action] ) ) {
 288                                 continue; // unprotected
 289                         }
 290                         if ( !$expiry[$action] ) {
 291                                 $this->show( array( 'protect_expiry_invalid' ) );
 292                                 return false;
 293                         }
 294                         if ( $expiry[$action] < wfTimestampNow() ) {
 295                                 $this->show( array( 'protect_expiry_old' ) );
 296                                 return false;
 297                         }
 298                 }
 299
 300                 # They shouldn't be able to do this anyway, but just to make sure, ensure that cascading restrictions aren't being applied
 301                 #  to a semi-protected page.
 302                 $edit_restriction = isset( $this->mRestrictions['edit'] ) ? $this->mRestrictions['edit'] : '';
 303                 $this->mCascade = $wgRequest->getBool( 'mwProtect-cascade' );
 304                 if ( $this->mCascade && ( $edit_restriction != 'protect' ) &&
 305                         !User::groupHasPermission( $edit_restriction, 'protect' ) ) {
 306                         $this->mCascade = false;
 307                 }
 308
 309                 $status = $this->mArticle->doUpdateRestrictions( $this->mRestrictions, $expiry, $this->mCascade, $reasonstr, $wgUser );
 310
 311                 if ( !$status->isOK() ) {
 312                         $this->show( $wgOut->parseInline( $status->getWikiText() ) );
 313                         return false;
 314                 }
 315
 316                 /**
 317                  * Give extensions a change to handle added form items
 318                  *
 319                  * @since 1.19 you can (and you should) return false to abort saving;
 320                  *             you can also return an array of message name and its parameters
 321                  */
 322                 $errorMsg = '';
 323                 if ( !wfRunHooks( 'ProtectionForm::save', array( $this->mArticle, &$errorMsg ) ) ) {
 324                         if ( $errorMsg == '' ) {
 325                                 $errorMsg = array( 'hookaborted' );
 326                         }
 327                 }
 328                 if ( $errorMsg != '' ) {
 329                         $this->show( $errorMsg );
 330                         return false;
 331                 }
 332
 333                 if ( $wgUser->isLoggedIn() && $wgRequest->getCheck( 'mwProtectWatch' ) != $wgUser->isWatched( $this->mTitle ) ) {
 334                         if ( $wgRequest->getCheck( 'mwProtectWatch' ) ) {
 335                                 WatchAction::doWatch( $this->mTitle, $wgUser );
 336                         } else {
 337                                 WatchAction::doUnwatch( $this->mTitle, $wgUser );
 338                         }
 339                 }
 340                 return true;
 341         }
 342
 343         /**
 344          * Build the input form
 345          *
 346          * @return String: HTML form
 347          */
 348         function buildForm() {
 349                 global $wgUser, $wgLang, $wgOut;
 350
 351                 $mProtectreasonother = Xml::label(
 352                         wfMessage( 'protectcomment' )->text(),
 353                         'wpProtectReasonSelection'
 354                 );
 355                 $mProtectreason = Xml::label(
 356                         wfMessage( 'protect-otherreason' )->text(),
 357                         'mwProtect-reason'
 358                 );
 359
 360                 $out = '';
 361                 if ( !$this->disabled ) {
 362                         $wgOut->addModules( 'mediawiki.legacy.protect' );
 363                         $out .= Xml::openElement( 'form', array( 'method' => 'post',
 364                                 'action' => $this->mTitle->getLocalURL( 'action=protect' ),
 365                                 'id' => 'mw-Protect-Form', 'onsubmit' => 'ProtectionForm.enableUnchainedInputs(true)' ) );
 366                 }
 367
 368                 $out .= Xml::openElement( 'fieldset' ) .
 369                         Xml::element( 'legend', null, wfMessage( 'protect-legend' )->text() ) .
 370                         Xml::openElement( 'table', array( 'id' => 'mwProtectSet' ) ) .
 371                         Xml::openElement( 'tbody' );
 372
 373                 foreach ( $this->mRestrictions as $action => $selected ) {
 374                         /* Not all languages have V_x <-> N_x relation */
 375                         $msg = wfMessage( 'restriction-' . $action );
 376                         $out .= "<tr><td>" .
 377                         Xml::openElement( 'fieldset' ) .
 378                         Xml::element( 'legend', null, $msg->exists() ? $msg->text() : $action ) .
 379                         Xml::openElement( 'table', array( 'id' => "mw-protect-table-$action" ) ) .
 380                                 "<tr><td>" . $this->buildSelector( $action, $selected ) . "</td></tr><tr><td>";
 381
 382                         $reasonDropDown = Xml::listDropDown( 'wpProtectReasonSelection',
 383                                 wfMessage( 'protect-dropdown' )->inContentLanguage()->text(),
 384                                 wfMessage( 'protect-otherreason-op' )->inContentLanguage()->text(),
 385                                 $this->mReasonSelection,
 386                                 'mwProtect-reason', 4 );
 387                         $scExpiryOptions = wfMessage( 'protect-expiry-options' )->inContentLanguage()->text();
 388
 389                         $showProtectOptions = ($scExpiryOptions !== '-' && !$this->disabled);
 390
 391                         $mProtectexpiry = Xml::label(
 392                                 wfMessage( 'protectexpiry' )->text(),
 393                                 "mwProtectExpirySelection-$action"
 394                         );
 395                         $mProtectother = Xml::label(
 396                                 wfMessage( 'protect-othertime' )->text(),
 397                                 "mwProtect-$action-expires"
 398                         );
 399
 400                         $expiryFormOptions = '';
 401                         if ( $this->mExistingExpiry[$action] && $this->mExistingExpiry[$action] != 'infinity' ) {
 402                                 $timestamp = $wgLang->timeanddate( $this->mExistingExpiry[$action], true );
 403                                 $d = $wgLang->date( $this->mExistingExpiry[$action], true );
 404                                 $t = $wgLang->time( $this->mExistingExpiry[$action], true );
 405                                 $expiryFormOptions .=
 406                                         Xml::option(
 407                                                 wfMessage( 'protect-existing-expiry', $timestamp, $d, $t )->text(),
 408                                                 'existing',
 409                                                 $this->mExpirySelection[$action] == 'existing'
 410                                         ) . "\n";
 411                         }
 412
 413                         $expiryFormOptions .= Xml::option(
 414                                 wfMessage( 'protect-othertime-op' )->text(),
 415                                 "othertime"
 416                         ) . "\n";
 417                         foreach ( explode( ',', $scExpiryOptions ) as $option ) {
 418                                 if ( strpos( $option, ":" ) === false ) {
 419                                         $show = $value = $option;
 420                                 } else {
 421                                         list( $show, $value ) = explode( ":", $option );
 422                                 }
 423                                 $show = htmlspecialchars( $show );
 424                                 $value = htmlspecialchars( $value );
 425                                 $expiryFormOptions .= Xml::option( $show, $value, $this->mExpirySelection[$action] === $value ) . "\n";
 426                         }
 427                         # Add expiry dropdown
 428                         if ( $showProtectOptions && !$this->disabled ) {
 429                                 $out .= "
 430                                         <table><tr>
 431                                                 <td class='mw-label'>
 432                                                         {$mProtectexpiry}
 433                                                 </td>
 434                                                 <td class='mw-input'>" .
 435                                                         Xml::tags( 'select',
 436                                                                 array(
 437                                                                         'id' => "mwProtectExpirySelection-$action",
 438                                                                         'name' => "wpProtectExpirySelection-$action",
 439                                                                         'onchange' => "ProtectionForm.updateExpiryList(this)",
 440                                                                         'tabindex' => '2' ) + $this->disabledAttrib,
 441                                                                 $expiryFormOptions ) .
 442                                                 "</td>
 443                                         </tr></table>";
 444                         }
 445                         # Add custom expiry field
 446                         $attribs = array( 'id' => "mwProtect-$action-expires",
 447                                 'onkeyup' => 'ProtectionForm.updateExpiry(this)',
 448                                 'onchange' => 'ProtectionForm.updateExpiry(this)' ) + $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                 wfRunHooks( 'ProtectionForm::buildForm', array( $this->mArticle, &$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', array( 'id' => 'mw-protect-table2' ) ) .
 470                                 Xml::openElement( 'tbody' );
 471                         $out .= '<tr>
 472                                         <td></td>
 473                                         <td class="mw-input">' .
 474                                                 Xml::checkLabel(
 475                                                         wfMessage( '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                         $out .= Xml::openElement( 'table', array( 'id' => 'mw-protect-table3' ) ) .
 488                                 Xml::openElement( 'tbody' );
 489                         $out .= "
 490                                 <tr>
 491                                         <td class='mw-label'>
 492                                                 {$mProtectreasonother}
 493                                         </td>
 494                                         <td class='mw-input'>
 495                                                 {$reasonDropDown}
 496                                         </td>
 497                                 </tr>
 498                                 <tr>
 499                                         <td class='mw-label'>
 500                                                 {$mProtectreason}
 501                                         </td>
 502                                         <td class='mw-input'>" .
 503                                                 Xml::input( 'mwProtect-reason', 60, $this->mReason, array( 'type' => 'text',
 504                                                         'id' => 'mwProtect-reason', 'maxlength' => 180 ) ) .
 505                                                         // Limited maxlength as the database trims at 255 bytes and other texts
 506                                                         // chosen by dropdown menus on this page are also included in this database field.
 507                                                         // The byte limit of 180 bytes is enforced in javascript
 508                                         "</td>
 509                                 </tr>";
 510                         # Disallow watching is user is not logged in
 511                         if ( $wgUser->isLoggedIn() ) {
 512                                 $out .= "
 513                                 <tr>
 514                                         <td></td>
 515                                         <td class='mw-input'>" .
 516                                                 Xml::checkLabel( wfMessage( 'watchthis' )->text(),
 517                                                         'mwProtectWatch', 'mwProtectWatch',
 518                                                         $wgUser->isWatched( $this->mTitle ) || $wgUser->getOption( 'watchdefault' ) ) .
 519                                         "</td>
 520                                 </tr>";
 521                         }
 522                         $out .= "
 523                                 <tr>
 524                                         <td></td>
 525                                         <td class='mw-submit'>" .
 526                                                 Xml::submitButton(
 527                                                         wfMessage( 'confirm' )->text(),
 528                                                         array( 'id' => 'mw-Protect-submit' )
 529                                                 ) .
 530                                         "</td>
 531                                 </tr>\n";
 532                         $out .= Xml::closeElement( 'tbody' ) . Xml::closeElement( 'table' );
 533                 }
 534                 $out .= Xml::closeElement( 'fieldset' );
 535
 536                 if ( $wgUser->isAllowed( 'editinterface' ) ) {
 537                         $title = Title::makeTitle( NS_MEDIAWIKI, 'Protect-dropdown' );
 538                         $link = Linker::link(
 539                                 $title,
 540                                 wfMessage( 'protect-edit-reasonlist' )->escaped(),
 541                                 array(),
 542                                 array( 'action' => 'edit' )
 543                         );
 544                         $out .= '<p class="mw-protect-editreasons">' . $link . '</p>';
 545                 }
 546
 547                 if ( !$this->disabled ) {
 548                         $out .= Html::hidden( 'wpEditToken', $wgUser->getEditToken( array( 'protect', $this->mTitle->getPrefixedDBkey() ) ) );
 549                         $out .= Xml::closeElement( 'form' );
 550                         $wgOut->addScript( $this->buildCleanupScript() );
 551                 }
 552
 553                 return $out;
 554         }
 555
 556         /**
 557          * Build protection level selector
 558          *
 559          * @param string $action action to protect
 560          * @param string $selected current protection level
 561          * @return String: HTML fragment
 562          */
 563         function buildSelector( $action, $selected ) {
 564                 global $wgRestrictionLevels, $wgUser;
 565
 566                 $levels = array();
 567                 foreach ( $wgRestrictionLevels as $key ) {
 568                         //don't let them choose levels above their own (aka so they can still unprotect and edit the page). but only when the form isn't disabled
 569                         if ( $key == 'sysop' ) {
 570                                 //special case, rewrite sysop to protect and editprotected
 571                                 if ( !$wgUser->isAllowedAny( 'protect', 'editprotected' ) && !$this->disabled ) {
 572                                         continue;
 573                                 }
 574                         } else {
 575                                 if ( !$wgUser->isAllowed( $key ) && !$this->disabled ) {
 576                                         continue;
 577                                 }
 578                         }
 579                         $levels[] = $key;
 580                 }
 581
 582                 $id = 'mwProtect-level-' . $action;
 583                 $attribs = array(
 584                         'id' => $id,
 585                         'name' => $id,
 586                         'size' => count( $levels ),
 587                         'onchange' => 'ProtectionForm.updateLevels(this)',
 588                         ) + $this->disabledAttrib;
 589
 590                 $out = Xml::openElement( 'select', $attribs );
 591                 foreach ( $levels as $key ) {
 592                         $out .= Xml::option( $this->getOptionLabel( $key ), $key, $key == $selected );
 593                 }
 594                 $out .= Xml::closeElement( 'select' );
 595                 return $out;
 596         }
 597
 598         /**
 599          * Prepare the label for a protection selector option
 600          *
 601          * @param string $permission permission required
 602          * @return String
 603          */
 604         private function getOptionLabel( $permission ) {
 605                 if ( $permission == '' ) {
 606                         return wfMessage( 'protect-default' )->text();
 607                 } else {
 608                         $msg = wfMessage( "protect-level-{$permission}" );
 609                         if ( $msg->exists() ) {
 610                                 return $msg->text();
 611                         }
 612                         return wfMessage( 'protect-fallback', $permission )->text();
 613                 }
 614         }
 615
 616         function buildCleanupScript() {
 617                 global $wgRestrictionLevels, $wgOut;
 618
 619                 $cascadeableLevels = array();
 620                 foreach ( $wgRestrictionLevels as $key ) {
 621                         if ( User::groupHasPermission( $key, 'protect' )
 622                                 || $key == 'protect'
 623                         ) {
 624                                 $cascadeableLevels[] = $key;
 625                         }
 626                 }
 627                 $options = array(
 628                         'tableId' => 'mwProtectSet',
 629                         'labelText' => wfMessage( 'protect-unchain-permissions' )->plain(),
 630                         'numTypes' => count( $this->mApplicableTypes ),
 631                         'existingMatch' => count( array_unique( $this->mExistingExpiry ) ) === 1,
 632                 );
 633
 634                 $wgOut->addJsConfigVars( 'wgCascadeableLevels', $cascadeableLevels );
 635                 $script = Xml::encodeJsCall( 'ProtectionForm.init', array( $options ) );
 636                 return Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) );
 637         }
 638
 639         /**
 640          * Show protection long extracts for this page
 641          *
 642          * @param $out OutputPage
 643          * @access private
 644          */
 645         function showLogExtract( &$out ) {
 646                 # Show relevant lines from the protection log:
 647                 $protectLogPage = new LogPage( 'protect' );
 648                 $out->addHTML( Xml::element( 'h2', null, $protectLogPage->getName()->text() ) );
 649                 LogEventsList::showLogExtract( $out, 'protect', $this->mTitle );
 650                 # Let extensions add other relevant log extracts
 651                 wfRunHooks( 'ProtectionForm::showLogExtract', array( $this->mArticle, $out ) );
 652         }
 653 }