includes/specials/SpecialUserrights.php

   1 <?php
   2 /**
   3  * Implements Special:Userrights
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup SpecialPage
  22  */
  23
  24 /**
  25  * Special page to allow managing user group membership
  26  *
  27  * @ingroup SpecialPage
  28  */
  29 class UserrightsPage extends SpecialPage {
  30         # The target of the local right-adjuster's interest.  Can be gotten from
  31         # either a GET parameter or a subpage-style parameter, so have a member
  32         # variable for it.
  33         protected $mTarget;
  34         protected $isself = false;
  35
  36         public function __construct() {
  37                 parent::__construct( 'Userrights' );
  38         }
  39
  40         public function isRestricted() {
  41                 return true;
  42         }
  43
  44         public function userCanExecute( User $user ) {
  45                 return $this->userCanChangeRights( $user, false );
  46         }
  47
  48         /**
  49          * @param User $user
  50          * @param bool $checkIfSelf
  51          * @return bool
  52          */
  53         public function userCanChangeRights( $user, $checkIfSelf = true ) {
  54                 $available = $this->changeableGroups();
  55                 if ( $user->getId() == 0 ) {
  56                         return false;
  57                 }
  58                 return !empty( $available['add'] )
  59                         || !empty( $available['remove'] )
  60                         || ( ( $this->isself || !$checkIfSelf ) &&
  61                                 ( !empty( $available['add-self'] )
  62                                         || !empty( $available['remove-self'] ) ) );
  63         }
  64
  65         /**
  66          * Manage forms to be shown according to posted data.
  67          * Depending on the submit button used, call a form or a save function.
  68          *
  69          * @param $par Mixed: string if any subpage provided, else null
  70          * @throws UserBlockedError|PermissionsError
  71          */
  72         public function execute( $par ) {
  73                 // If the visitor doesn't have permissions to assign or remove
  74                 // any groups, it's a bit silly to give them the user search prompt.
  75
  76                 $user = $this->getUser();
  77
  78                 /*
  79                  * If the user is blocked and they only have "partial" access
  80                  * (e.g. they don't have the userrights permission), then don't
  81                  * allow them to use Special:UserRights.
  82                  */
  83                 if ( $user->isBlocked() && !$user->isAllowed( 'userrights' ) ) {
  84                         throw new UserBlockedError( $user->getBlock() );
  85                 }
  86
  87                 $request = $this->getRequest();
  88
  89                 if ( $par !== null ) {
  90                         $this->mTarget = $par;
  91                 } else {
  92                         $this->mTarget = $request->getVal( 'user' );
  93                 }
  94
  95                 $available = $this->changeableGroups();
  96
  97                 if ( $this->mTarget === null ) {
  98                         /*
  99                          * If the user specified no target, and they can only
 100                          * edit their own groups, automatically set them as the
 101                          * target.
 102                          */
 103                         if ( !count( $available['add'] ) && !count( $available['remove'] ) ) {
 104                                 $this->mTarget = $user->getName();
 105                         }
 106                 }
 107
 108                 if ( User::getCanonicalName( $this->mTarget ) == $user->getName() ) {
 109                         $this->isself = true;
 110                 }
 111
 112                 if ( !$this->userCanChangeRights( $user, true ) ) {
 113                         // @todo FIXME: There may be intermediate groups we can mention.
 114                         $msg = $user->isAnon() ? 'userrights-nologin' : 'userrights-notallowed';
 115                         throw new PermissionsError( null, array( array( $msg ) ) );
 116                 }
 117
 118                 $this->checkReadOnly();
 119
 120                 $this->setHeaders();
 121                 $this->outputHeader();
 122
 123                 $out = $this->getOutput();
 124                 $out->addModuleStyles( 'mediawiki.special' );
 125
 126                 // show the general form
 127                 if ( count( $available['add'] ) || count( $available['remove'] ) ) {
 128                         $this->switchForm();
 129                 }
 130
 131                 if ( $request->wasPosted() ) {
 132                         // save settings
 133                         if ( $request->getCheck( 'saveusergroups' ) ) {
 134                                 $reason = $request->getVal( 'user-reason' );
 135                                 $tok = $request->getVal( 'wpEditToken' );
 136                                 if ( $user->matchEditToken( $tok, $this->mTarget ) ) {
 137                                         $this->saveUserGroups(
 138                                                 $this->mTarget,
 139                                                 $reason
 140                                         );
 141
 142                                         $out->redirect( $this->getSuccessURL() );
 143                                         return;
 144                                 }
 145                         }
 146                 }
 147
 148                 // show some more forms
 149                 if ( $this->mTarget !== null ) {
 150                         $this->editUserGroupsForm( $this->mTarget );
 151                 }
 152         }
 153
 154         function getSuccessURL() {
 155                 return $this->getTitle( $this->mTarget )->getFullURL();
 156         }
 157
 158         /**
 159          * Save user groups changes in the database.
 160          * Data comes from the editUserGroupsForm() form function
 161          *
 162          * @param string $username username to apply changes to.
 163          * @param string $reason reason for group change
 164          * @return null
 165          */
 166         function saveUserGroups( $username, $reason = '' ) {
 167                 $status = $this->fetchUser( $username );
 168                 if ( !$status->isOK() ) {
 169                         $this->getOutput()->addWikiText( $status->getWikiText() );
 170                         return;
 171                 } else {
 172                         $user = $status->value;
 173                 }
 174
 175                 $allgroups = $this->getAllGroups();
 176                 $addgroup = array();
 177                 $removegroup = array();
 178
 179                 // This could possibly create a highly unlikely race condition if permissions are changed between
 180                 //  when the form is loaded and when the form is saved. Ignoring it for the moment.
 181                 foreach ( $allgroups as $group ) {
 182                         // We'll tell it to remove all unchecked groups, and add all checked groups.
 183                         // Later on, this gets filtered for what can actually be removed
 184                         if ( $this->getRequest()->getCheck( "wpGroup-$group" ) ) {
 185                                 $addgroup[] = $group;
 186                         } else {
 187                                 $removegroup[] = $group;
 188                         }
 189                 }
 190
 191                 $this->doSaveUserGroups( $user, $addgroup, $removegroup, $reason );
 192         }
 193
 194         /**
 195          * Save user groups changes in the database.
 196          *
 197          * @param $user User object
 198          * @param array $add of groups to add
 199          * @param array $remove of groups to remove
 200          * @param string $reason reason for group change
 201          * @return Array: Tuple of added, then removed groups
 202          */
 203         function doSaveUserGroups( $user, $add, $remove, $reason = '' ) {
 204                 // Validate input set...
 205                 $isself = ( $user->getName() == $this->getUser()->getName() );
 206                 $groups = $user->getGroups();
 207                 $changeable = $this->changeableGroups();
 208                 $addable = array_merge( $changeable['add'], $isself ? $changeable['add-self'] : array() );
 209                 $removable = array_merge( $changeable['remove'], $isself ? $changeable['remove-self'] : array() );
 210
 211                 $remove = array_unique(
 212                         array_intersect( (array)$remove, $removable, $groups ) );
 213                 $add = array_unique( array_diff(
 214                         array_intersect( (array)$add, $addable ),
 215                         $groups )
 216                 );
 217
 218                 $oldGroups = $user->getGroups();
 219                 $newGroups = $oldGroups;
 220
 221                 // remove then add groups
 222                 if ( $remove ) {
 223                         $newGroups = array_diff( $newGroups, $remove );
 224                         foreach ( $remove as $group ) {
 225                                 $user->removeGroup( $group );
 226                         }
 227                 }
 228                 if ( $add ) {
 229                         $newGroups = array_merge( $newGroups, $add );
 230                         foreach ( $add as $group ) {
 231                                 $user->addGroup( $group );
 232                         }
 233                 }
 234                 $newGroups = array_unique( $newGroups );
 235
 236                 // Ensure that caches are cleared
 237                 $user->invalidateCache();
 238
 239                 wfDebug( 'oldGroups: ' . print_r( $oldGroups, true ) );
 240                 wfDebug( 'newGroups: ' . print_r( $newGroups, true ) );
 241                 wfRunHooks( 'UserRights', array( &$user, $add, $remove ) );
 242
 243                 if ( $newGroups != $oldGroups ) {
 244                         $this->addLogEntry( $user, $oldGroups, $newGroups, $reason );
 245                 }
 246                 return array( $add, $remove );
 247         }
 248
 249         /**
 250          * Add a rights log entry for an action.
 251          */
 252         function addLogEntry( $user, $oldGroups, $newGroups, $reason ) {
 253                 $logEntry = new ManualLogEntry( 'rights', 'rights' );
 254                 $logEntry->setPerformer( $this->getUser() );
 255                 $logEntry->setTarget( $user->getUserPage() );
 256                 $logEntry->setComment( $reason );
 257                 $logEntry->setParameters( array(
 258                         '4::oldgroups' => $oldGroups,
 259                         '5::newgroups' => $newGroups,
 260                 ) );
 261                 $logid = $logEntry->insert();
 262                 $logEntry->publish( $logid );
 263         }
 264
 265         /**
 266          * Edit user groups membership
 267          * @param string $username name of the user.
 268          */
 269         function editUserGroupsForm( $username ) {
 270                 $status = $this->fetchUser( $username );
 271                 if ( !$status->isOK() ) {
 272                         $this->getOutput()->addWikiText( $status->getWikiText() );
 273                         return;
 274                 } else {
 275                         $user = $status->value;
 276                 }
 277
 278                 $groups = $user->getGroups();
 279
 280                 $this->showEditUserGroupsForm( $user, $groups );
 281
 282                 // This isn't really ideal logging behavior, but let's not hide the
 283                 // interwiki logs if we're using them as is.
 284                 $this->showLogFragment( $user, $this->getOutput() );
 285         }
 286
 287         /**
 288          * Normalize the input username, which may be local or remote, and
 289          * return a user (or proxy) object for manipulating it.
 290          *
 291          * Side effects: error output for invalid access
 292          * @param string $username
 293          * @return Status object
 294          */
 295         public function fetchUser( $username ) {
 296                 global $wgUserrightsInterwikiDelimiter;
 297
 298                 $parts = explode( $wgUserrightsInterwikiDelimiter, $username );
 299                 if ( count( $parts ) < 2 ) {
 300                         $name = trim( $username );
 301                         $database = '';
 302                 } else {
 303                         list( $name, $database ) = array_map( 'trim', $parts );
 304
 305                         if ( $database == wfWikiID() ) {
 306                                 $database = '';
 307                         } else {
 308                                 if ( !$this->getUser()->isAllowed( 'userrights-interwiki' ) ) {
 309                                         return Status::newFatal( 'userrights-no-interwiki' );
 310                                 }
 311                                 if ( !UserRightsProxy::validDatabase( $database ) ) {
 312                                         return Status::newFatal( 'userrights-nodatabase', $database );
 313                                 }
 314                         }
 315                 }
 316
 317                 if ( $name === '' ) {
 318                         return Status::newFatal( 'nouserspecified' );
 319                 }
 320
 321                 if ( $name[0] == '#' ) {
 322                         // Numeric ID can be specified...
 323                         // We'll do a lookup for the name internally.
 324                         $id = intval( substr( $name, 1 ) );
 325
 326                         if ( $database == '' ) {
 327                                 $name = User::whoIs( $id );
 328                         } else {
 329                                 $name = UserRightsProxy::whoIs( $database, $id );
 330                         }
 331
 332                         if ( !$name ) {
 333                                 return Status::newFatal( 'noname' );
 334                         }
 335                 } else {
 336                         $name = User::getCanonicalName( $name );
 337                         if ( $name === false ) {
 338                                 // invalid name
 339                                 return Status::newFatal( 'nosuchusershort', $username );
 340                         }
 341                 }
 342
 343                 if ( $database == '' ) {
 344                         $user = User::newFromName( $name );
 345                 } else {
 346                         $user = UserRightsProxy::newFromName( $database, $name );
 347                 }
 348
 349                 if ( !$user || $user->isAnon() ) {
 350                         return Status::newFatal( 'nosuchusershort', $username );
 351                 }
 352
 353                 return Status::newGood( $user );
 354         }
 355
 356         function makeGroupNameList( $ids ) {
 357                 if ( empty( $ids ) ) {
 358                         return $this->msg( 'rightsnone' )->inContentLanguage()->text();
 359                 } else {
 360                         return implode( ', ', $ids );
 361                 }
 362         }
 363
 364         /**
 365          * Make a list of group names to be stored as parameter for log entries
 366          *
 367          * @deprecated in 1.21; use LogFormatter instead.
 368          * @param $ids array
 369          * @return string
 370          */
 371         function makeGroupNameListForLog( $ids ) {
 372                 wfDeprecated( __METHOD__, '1.21' );
 373
 374                 if ( empty( $ids ) ) {
 375                         return '';
 376                 } else {
 377                         return $this->makeGroupNameList( $ids );
 378                 }
 379         }
 380
 381         /**
 382          * Output a form to allow searching for a user
 383          */
 384         function switchForm() {
 385                 global $wgScript;
 386                 $this->getOutput()->addHTML(
 387                         Html::openElement( 'form', array( 'method' => 'get', 'action' => $wgScript, 'name' => 'uluser', 'id' => 'mw-userrights-form1' ) ) .
 388                         Html::hidden( 'title', $this->getTitle()->getPrefixedText() ) .
 389                         Xml::fieldset( $this->msg( 'userrights-lookup-user' )->text() ) .
 390                         Xml::inputLabel( $this->msg( 'userrights-user-editname' )->text(), 'user', 'username', 30, str_replace( '_', ' ', $this->mTarget ) ) . ' ' .
 391                         Xml::submitButton( $this->msg( 'editusergroup' )->text() ) .
 392                         Html::closeElement( 'fieldset' ) .
 393                         Html::closeElement( 'form' ) . "\n"
 394                 );
 395         }
 396
 397         /**
 398          * Go through used and available groups and return the ones that this
 399          * form will be able to manipulate based on the current user's system
 400          * permissions.
 401          *
 402          * @param array $groups list of groups the given user is in
 403          * @return Array:  Tuple of addable, then removable groups
 404          */
 405         protected function splitGroups( $groups ) {
 406                 list( $addable, $removable, $addself, $removeself ) = array_values( $this->changeableGroups() );
 407
 408                 $removable = array_intersect(
 409                         array_merge( $this->isself ? $removeself : array(), $removable ),
 410                         $groups
 411                 ); // Can't remove groups the user doesn't have
 412                 $addable = array_diff(
 413                         array_merge( $this->isself ? $addself : array(), $addable ),
 414                         $groups
 415                 ); // Can't add groups the user does have
 416
 417                 return array( $addable, $removable );
 418         }
 419
 420         /**
 421          * Show the form to edit group memberships.
 422          *
 423          * @param $user      User or UserRightsProxy you're editing
 424          * @param $groups    Array:  Array of groups the user is in
 425          */
 426         protected function showEditUserGroupsForm( $user, $groups ) {
 427                 $list = array();
 428                 $membersList = array();
 429                 foreach ( $groups as $group ) {
 430                         $list[] = self::buildGroupLink( $group );
 431                         $membersList[] = self::buildGroupMemberLink( $group );
 432                 }
 433
 434                 $autoList = array();
 435                 $autoMembersList = array();
 436                 if ( $user instanceof User ) {
 437                         foreach ( Autopromote::getAutopromoteGroups( $user ) as $group ) {
 438                                 $autoList[] = self::buildGroupLink( $group );
 439                                 $autoMembersList[] = self::buildGroupMemberLink( $group );
 440                         }
 441                 }
 442
 443                 $language = $this->getLanguage();
 444                 $displayedList = $this->msg( 'userrights-groupsmember-type',
 445                         $language->listToText( $list ),
 446                         $language->listToText( $membersList )
 447                 )->plain();
 448                 $displayedAutolist = $this->msg( 'userrights-groupsmember-type',
 449                         $language->listToText( $autoList ),
 450                         $language->listToText( $autoMembersList )
 451                 )->plain();
 452
 453                 $grouplist = '';
 454                 $count = count( $list );
 455                 if ( $count > 0 ) {
 456                         $grouplist = $this->msg( 'userrights-groupsmember', $count, $user->getName() )->parse();
 457                         $grouplist = '<p>' . $grouplist . ' ' . $displayedList . "</p>\n";
 458                 }
 459                 $count = count( $autoList );
 460                 if ( $count > 0 ) {
 461                         $autogrouplistintro = $this->msg( 'userrights-groupsmember-auto', $count, $user->getName() )->parse();
 462                         $grouplist .= '<p>' . $autogrouplistintro . ' ' . $displayedAutolist . "</p>\n";
 463                 }
 464
 465                 $userToolLinks = Linker::userToolLinks(
 466                                 $user->getId(),
 467                                 $user->getName(),
 468                                 false, /* default for redContribsWhenNoEdits */
 469                                 Linker::TOOL_LINKS_EMAIL /* Add "send e-mail" link */
 470                 );
 471
 472                 $this->getOutput()->addHTML(
 473                         Xml::openElement( 'form', array( 'method' => 'post', 'action' => $this->getTitle()->getLocalURL(), 'name' => 'editGroup', 'id' => 'mw-userrights-form2' ) ) .
 474                         Html::hidden( 'user', $this->mTarget ) .
 475                         Html::hidden( 'wpEditToken', $this->getUser()->getEditToken( $this->mTarget ) ) .
 476                         Xml::openElement( 'fieldset' ) .
 477                         Xml::element( 'legend', array(), $this->msg( 'userrights-editusergroup', $user->getName() )->text() ) .
 478                         $this->msg( 'editinguser' )->params( wfEscapeWikiText( $user->getName() ) )->rawParams( $userToolLinks )->parse() .
 479                         $this->msg( 'userrights-groups-help', $user->getName() )->parse() .
 480                         $grouplist .
 481                         Xml::tags( 'p', null, $this->groupCheckboxes( $groups, $user ) ) .
 482                         Xml::openElement( 'table', array( 'id' => 'mw-userrights-table-outer' ) ) .
 483                                 "<tr>
 484                                         <td class='mw-label'>" .
 485                                                 Xml::label( $this->msg( 'userrights-reason' )->text(), 'wpReason' ) .
 486                                         "</td>
 487                                         <td class='mw-input'>" .
 488                                                 Xml::input( 'user-reason', 60, $this->getRequest()->getVal( 'user-reason', false ),
 489                                                         array( 'id' => 'wpReason', 'maxlength' => 255 ) ) .
 490                                         "</td>
 491                                 </tr>
 492                                 <tr>
 493                                         <td></td>
 494                                         <td class='mw-submit'>" .
 495                                                 Xml::submitButton( $this->msg( 'saveusergroups' )->text(),
 496                                                         array( 'name' => 'saveusergroups' ) + Linker::tooltipAndAccesskeyAttribs( 'userrights-set' ) ) .
 497                                         "</td>
 498                                 </tr>" .
 499                         Xml::closeElement( 'table' ) . "\n" .
 500                         Xml::closeElement( 'fieldset' ) .
 501                         Xml::closeElement( 'form' ) . "\n"
 502                 );
 503         }
 504
 505         /**
 506          * Format a link to a group description page
 507          *
 508          * @param $group string
 509          * @return string
 510          */
 511         private static function buildGroupLink( $group ) {
 512                 return User::makeGroupLinkHtml( $group, User::getGroupName( $group ) );
 513         }
 514
 515         /**
 516          * Format a link to a group member description page
 517          *
 518          * @param $group string
 519          * @return string
 520          */
 521         private static function buildGroupMemberLink( $group ) {
 522                 return User::makeGroupLinkHtml( $group, User::getGroupMember( $group ) );
 523         }
 524
 525         /**
 526          * Returns an array of all groups that may be edited
 527          * @return array Array of groups that may be edited.
 528          */
 529         protected static function getAllGroups() {
 530                 return User::getAllGroups();
 531         }
 532
 533         /**
 534          * Adds a table with checkboxes where you can select what groups to add/remove
 535          *
 536          * @todo Just pass the username string?
 537          * @param array $usergroups groups the user belongs to
 538          * @param $user User a user object
 539          * @return string XHTML table element with checkboxes
 540          */
 541         private function groupCheckboxes( $usergroups, $user ) {
 542                 $allgroups = $this->getAllGroups();
 543                 $ret = '';
 544
 545                 # Put all column info into an associative array so that extensions can
 546                 # more easily manage it.
 547                 $columns = array( 'unchangeable' => array(), 'changeable' => array() );
 548
 549                 foreach ( $allgroups as $group ) {
 550                         $set = in_array( $group, $usergroups );
 551                         # Should the checkbox be disabled?
 552                         $disabled = !(
 553                                 ( $set && $this->canRemove( $group ) ) ||
 554                                 ( !$set && $this->canAdd( $group ) ) );
 555                         # Do we need to point out that this action is irreversible?
 556                         $irreversible = !$disabled && (
 557                                 ( $set && !$this->canAdd( $group ) ) ||
 558                                 ( !$set && !$this->canRemove( $group ) ) );
 559
 560                         $checkbox = array(
 561                                 'set' => $set,
 562                                 'disabled' => $disabled,
 563                                 'irreversible' => $irreversible
 564                         );
 565
 566                         if ( $disabled ) {
 567                                 $columns['unchangeable'][$group] = $checkbox;
 568                         } else {
 569                                 $columns['changeable'][$group] = $checkbox;
 570                         }
 571                 }
 572
 573                 # Build the HTML table
 574                 $ret .= Xml::openElement( 'table', array( 'class' => 'mw-userrights-groups' ) ) .
 575                         "<tr>\n";
 576                 foreach ( $columns as $name => $column ) {
 577                         if ( $column === array() ) {
 578                                 continue;
 579                         }
 580                         $ret .= Xml::element( 'th', null, $this->msg( 'userrights-' . $name . '-col', count( $column ) )->text() );
 581                 }
 582                 $ret .= "</tr>\n<tr>\n";
 583                 foreach ( $columns as $column ) {
 584                         if ( $column === array() ) {
 585                                 continue;
 586                         }
 587                         $ret .= "\t<td style='vertical-align:top;'>\n";
 588                         foreach ( $column as $group => $checkbox ) {
 589                                 $attr = $checkbox['disabled'] ? array( 'disabled' => 'disabled' ) : array();
 590
 591                                 $member = User::getGroupMember( $group, $user->getName() );
 592                                 if ( $checkbox['irreversible'] ) {
 593                                         $text = $this->msg( 'userrights-irreversible-marker', $member )->escaped();
 594                                 } else {
 595                                         $text = htmlspecialchars( $member );
 596                                 }
 597                                 $checkboxHtml = Xml::checkLabel( $text, "wpGroup-" . $group,
 598                                         "wpGroup-" . $group, $checkbox['set'], $attr );
 599                                 $ret .= "\t\t" . ( $checkbox['disabled']
 600                                         ? Xml::tags( 'span', array( 'class' => 'mw-userrights-disabled' ), $checkboxHtml )
 601                                         : $checkboxHtml
 602                                 ) . "<br />\n";
 603                         }
 604                         $ret .= "\t</td>\n";
 605                 }
 606                 $ret .= Xml::closeElement( 'tr' ) . Xml::closeElement( 'table' );
 607
 608                 return $ret;
 609         }
 610
 611         /**
 612          * @param  $group String: the name of the group to check
 613          * @return bool Can we remove the group?
 614          */
 615         private function canRemove( $group ) {
 616                 // $this->changeableGroups()['remove'] doesn't work, of course. Thanks,
 617                 // PHP.
 618                 $groups = $this->changeableGroups();
 619                 return in_array( $group, $groups['remove'] ) || ( $this->isself && in_array( $group, $groups['remove-self'] ) );
 620         }
 621
 622         /**
 623          * @param string $group the name of the group to check
 624          * @return bool Can we add the group?
 625          */
 626         private function canAdd( $group ) {
 627                 $groups = $this->changeableGroups();
 628                 return in_array( $group, $groups['add'] ) || ( $this->isself && in_array( $group, $groups['add-self'] ) );
 629         }
 630
 631         /**
 632          * Returns $this->getUser()->changeableGroups()
 633          *
 634          * @return Array array( 'add' => array( addablegroups ), 'remove' => array( removablegroups ), 'add-self' => array( addablegroups to self ), 'remove-self' => array( removable groups from self ) )
 635          */
 636         function changeableGroups() {
 637                 return $this->getUser()->changeableGroups();
 638         }
 639
 640         /**
 641          * Show a rights log fragment for the specified user
 642          *
 643          * @param $user User to show log for
 644          * @param $output OutputPage to use
 645          */
 646         protected function showLogFragment( $user, $output ) {
 647                 $rightsLogPage = new LogPage( 'rights' );
 648                 $output->addHTML( Xml::element( 'h2', null, $rightsLogPage->getName()->text() ) );
 649                 LogEventsList::showLogExtract( $output, 'rights', $user->getUserPage() );
 650         }
 651
 652         protected function getGroupName() {
 653                 return 'users';
 654         }
 655 }