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
  59                 return !empty( $available['add'] )
  60                         || !empty( $available['remove'] )
  61                         || ( ( $this->isself || !$checkIfSelf ) &&
  62                                 ( !empty( $available['add-self'] )
  63                                         || !empty( $available['remove-self'] ) ) );
  64         }
  65
  66         /**
  67          * Manage forms to be shown according to posted data.
  68          * Depending on the submit button used, call a form or a save function.
  69          *
  70          * @param string|null $par String if any subpage provided, else null
  71          * @throws UserBlockedError|PermissionsError
  72          */
  73         public function execute( $par ) {
  74                 // If the visitor doesn't have permissions to assign or remove
  75                 // any groups, it's a bit silly to give them the user search prompt.
  76
  77                 $user = $this->getUser();
  78
  79                 /*
  80                  * If the user is blocked and they only have "partial" access
  81                  * (e.g. they don't have the userrights permission), then don't
  82                  * allow them to use Special:UserRights.
  83                  */
  84                 if ( $user->isBlocked() && !$user->isAllowed( 'userrights' ) ) {
  85                         throw new UserBlockedError( $user->getBlock() );
  86                 }
  87
  88                 $request = $this->getRequest();
  89
  90                 if ( $par !== null ) {
  91                         $this->mTarget = $par;
  92                 } else {
  93                         $this->mTarget = $request->getVal( 'user' );
  94                 }
  95
  96                 $available = $this->changeableGroups();
  97
  98                 if ( $this->mTarget === null ) {
  99                         /*
 100                          * If the user specified no target, and they can only
 101                          * edit their own groups, automatically set them as the
 102                          * target.
 103                          */
 104                         if ( !count( $available['add'] ) && !count( $available['remove'] ) ) {
 105                                 $this->mTarget = $user->getName();
 106                         }
 107                 }
 108
 109                 if ( $this->mTarget !== null && User::getCanonicalName( $this->mTarget ) === $user->getName() ) {
 110                         $this->isself = true;
 111                 }
 112
 113                 if ( !$this->userCanChangeRights( $user, true ) ) {
 114                         if ( $this->isself && $request->getCheck( 'success' ) ) {
 115                                 // bug 48609: if the user just removed its own rights, this would
 116                                 // leads it in a "permissions error" page. In that case, show a
 117                                 // message that it can't anymore use this page instead of an error
 118                                 $this->setHeaders();
 119                                 $out = $this->getOutput();
 120                                 $out->wrapWikiMsg( "<div class=\"successbox\">\n$1\n</div>", 'userrights-removed-self' );
 121                                 $out->returnToMain();
 122
 123                                 return;
 124                         }
 125
 126                         // @todo FIXME: There may be intermediate groups we can mention.
 127                         $msg = $user->isAnon() ? 'userrights-nologin' : 'userrights-notallowed';
 128                         throw new PermissionsError( null, array( array( $msg ) ) );
 129                 }
 130
 131                 $this->checkReadOnly();
 132
 133                 $this->setHeaders();
 134                 $this->outputHeader();
 135
 136                 $out = $this->getOutput();
 137                 $out->addModuleStyles( 'mediawiki.special' );
 138                 $this->addHelpLink( 'Help:Assigning permissions' );
 139
 140                 // show the general form
 141                 if ( count( $available['add'] ) || count( $available['remove'] ) ) {
 142                         $this->switchForm();
 143                 }
 144
 145                 if (
 146                         $request->wasPosted() &&
 147                         $request->getCheck( 'saveusergroups' ) &&
 148                         $this->mTarget !== null &&
 149                         $user->matchEditToken( $request->getVal( 'wpEditToken' ), $this->mTarget )
 150                 ) {
 151                         // save settings
 152                         $status = $this->fetchUser( $this->mTarget );
 153                         if ( !$status->isOK() ) {
 154                                 $this->getOutput()->addWikiText( $status->getWikiText() );
 155
 156                                 return;
 157                         }
 158
 159                         $targetUser = $status->value;
 160                         if ( $targetUser instanceof User ) { // UserRightsProxy doesn't have this method (bug 61252)
 161                                 $targetUser->clearInstanceCache(); // bug 38989
 162                         }
 163
 164                         if ( $request->getVal( 'conflictcheck-originalgroups' )
 165                                 !== implode( ',', $targetUser->getGroups() )
 166                         ) {
 167                                 $out->addWikiMsg( 'userrights-conflict' );
 168                         } else {
 169                                 $this->saveUserGroups(
 170                                         $this->mTarget,
 171                                         $request->getVal( 'user-reason' ),
 172                                         $targetUser
 173                                 );
 174
 175                                 $out->redirect( $this->getSuccessURL() );
 176
 177                                 return;
 178                         }
 179                 }
 180
 181                 // show some more forms
 182                 if ( $this->mTarget !== null ) {
 183                         $this->editUserGroupsForm( $this->mTarget );
 184                 }
 185         }
 186
 187         function getSuccessURL() {
 188                 return $this->getPageTitle( $this->mTarget )->getFullURL( array( 'success' => 1 ) );
 189         }
 190
 191         /**
 192          * Save user groups changes in the database.
 193          * Data comes from the editUserGroupsForm() form function
 194          *
 195          * @param string $username Username to apply changes to.
 196          * @param string $reason Reason for group change
 197          * @param User|UserRightsProxy $user Target user object.
 198          * @return null
 199          */
 200         function saveUserGroups( $username, $reason, $user ) {
 201                 $allgroups = $this->getAllGroups();
 202                 $addgroup = array();
 203                 $removegroup = array();
 204
 205                 // This could possibly create a highly unlikely race condition if permissions are changed between
 206                 //  when the form is loaded and when the form is saved. Ignoring it for the moment.
 207                 foreach ( $allgroups as $group ) {
 208                         // We'll tell it to remove all unchecked groups, and add all checked groups.
 209                         // Later on, this gets filtered for what can actually be removed
 210                         if ( $this->getRequest()->getCheck( "wpGroup-$group" ) ) {
 211                                 $addgroup[] = $group;
 212                         } else {
 213                                 $removegroup[] = $group;
 214                         }
 215                 }
 216
 217                 $this->doSaveUserGroups( $user, $addgroup, $removegroup, $reason );
 218         }
 219
 220         /**
 221          * Save user groups changes in the database.
 222          *
 223          * @param User|UserRightsProxy $user
 224          * @param array $add Array of groups to add
 225          * @param array $remove Array of groups to remove
 226          * @param string $reason Reason for group change
 227          * @return array Tuple of added, then removed groups
 228          */
 229         function doSaveUserGroups( $user, $add, $remove, $reason = '' ) {
 230                 global $wgAuth;
 231
 232                 // Validate input set...
 233                 $isself = $user->getName() == $this->getUser()->getName();
 234                 $groups = $user->getGroups();
 235                 $changeable = $this->changeableGroups();
 236                 $addable = array_merge( $changeable['add'], $isself ? $changeable['add-self'] : array() );
 237                 $removable = array_merge( $changeable['remove'], $isself ? $changeable['remove-self'] : array() );
 238
 239                 $remove = array_unique(
 240                         array_intersect( (array)$remove, $removable, $groups ) );
 241                 $add = array_unique( array_diff(
 242                         array_intersect( (array)$add, $addable ),
 243                         $groups )
 244                 );
 245
 246                 $oldGroups = $user->getGroups();
 247                 $newGroups = $oldGroups;
 248
 249                 // Remove then add groups
 250                 if ( $remove ) {
 251                         foreach ( $remove as $index => $group ) {
 252                                 if ( !$user->removeGroup( $group ) ) {
 253                                         unset( $remove[$index] );
 254                                 }
 255                         }
 256                         $newGroups = array_diff( $newGroups, $remove );
 257                 }
 258                 if ( $add ) {
 259                         foreach ( $add as $index => $group ) {
 260                                 if ( !$user->addGroup( $group ) ) {
 261                                         unset( $add[$index] );
 262                                 }
 263                         }
 264                         $newGroups = array_merge( $newGroups, $add );
 265                 }
 266                 $newGroups = array_unique( $newGroups );
 267
 268                 // Ensure that caches are cleared
 269                 $user->invalidateCache();
 270
 271                 // update groups in external authentication database
 272                 Hooks::run( 'UserGroupsChanged', array( $user, $add, $remove, $this->getUser() ) );
 273                 $wgAuth->updateExternalDBGroups( $user, $add, $remove );
 274
 275                 wfDebug( 'oldGroups: ' . print_r( $oldGroups, true ) . "\n" );
 276                 wfDebug( 'newGroups: ' . print_r( $newGroups, true ) . "\n" );
 277                 // Deprecated in favor of UserGroupsChanged hook
 278                 Hooks::run( 'UserRights', array( &$user, $add, $remove ), '1.26' );
 279
 280                 if ( $newGroups != $oldGroups ) {
 281                         $this->addLogEntry( $user, $oldGroups, $newGroups, $reason );
 282                 }
 283
 284                 return array( $add, $remove );
 285         }
 286
 287         /**
 288          * Add a rights log entry for an action.
 289          * @param User $user
 290          * @param array $oldGroups
 291          * @param array $newGroups
 292          * @param array $reason
 293          */
 294         function addLogEntry( $user, $oldGroups, $newGroups, $reason ) {
 295                 $logEntry = new ManualLogEntry( 'rights', 'rights' );
 296                 $logEntry->setPerformer( $this->getUser() );
 297                 $logEntry->setTarget( $user->getUserPage() );
 298                 $logEntry->setComment( $reason );
 299                 $logEntry->setParameters( array(
 300                         '4::oldgroups' => $oldGroups,
 301                         '5::newgroups' => $newGroups,
 302                 ) );
 303                 $logid = $logEntry->insert();
 304                 $logEntry->publish( $logid );
 305         }
 306
 307         /**
 308          * Edit user groups membership
 309          * @param string $username Name of the user.
 310          */
 311         function editUserGroupsForm( $username ) {
 312                 $status = $this->fetchUser( $username );
 313                 if ( !$status->isOK() ) {
 314                         $this->getOutput()->addWikiText( $status->getWikiText() );
 315
 316                         return;
 317                 } else {
 318                         $user = $status->value;
 319                 }
 320
 321                 $groups = $user->getGroups();
 322
 323                 $this->showEditUserGroupsForm( $user, $groups );
 324
 325                 // This isn't really ideal logging behavior, but let's not hide the
 326                 // interwiki logs if we're using them as is.
 327                 $this->showLogFragment( $user, $this->getOutput() );
 328         }
 329
 330         /**
 331          * Normalize the input username, which may be local or remote, and
 332          * return a user (or proxy) object for manipulating it.
 333          *
 334          * Side effects: error output for invalid access
 335          * @param string $username
 336          * @return Status
 337          */
 338         public function fetchUser( $username ) {
 339                 $parts = explode( $this->getConfig()->get( 'UserrightsInterwikiDelimiter' ), $username );
 340                 if ( count( $parts ) < 2 ) {
 341                         $name = trim( $username );
 342                         $database = '';
 343                 } else {
 344                         list( $name, $database ) = array_map( 'trim', $parts );
 345
 346                         if ( $database == wfWikiID() ) {
 347                                 $database = '';
 348                         } else {
 349                                 if ( !$this->getUser()->isAllowed( 'userrights-interwiki' ) ) {
 350                                         return Status::newFatal( 'userrights-no-interwiki' );
 351                                 }
 352                                 if ( !UserRightsProxy::validDatabase( $database ) ) {
 353                                         return Status::newFatal( 'userrights-nodatabase', $database );
 354                                 }
 355                         }
 356                 }
 357
 358                 if ( $name === '' ) {
 359                         return Status::newFatal( 'nouserspecified' );
 360                 }
 361
 362                 if ( $name[0] == '#' ) {
 363                         // Numeric ID can be specified...
 364                         // We'll do a lookup for the name internally.
 365                         $id = intval( substr( $name, 1 ) );
 366
 367                         if ( $database == '' ) {
 368                                 $name = User::whoIs( $id );
 369                         } else {
 370                                 $name = UserRightsProxy::whoIs( $database, $id );
 371                         }
 372
 373                         if ( !$name ) {
 374                                 return Status::newFatal( 'noname' );
 375                         }
 376                 } else {
 377                         $name = User::getCanonicalName( $name );
 378                         if ( $name === false ) {
 379                                 // invalid name
 380                                 return Status::newFatal( 'nosuchusershort', $username );
 381                         }
 382                 }
 383
 384                 if ( $database == '' ) {
 385                         $user = User::newFromName( $name );
 386                 } else {
 387                         $user = UserRightsProxy::newFromName( $database, $name );
 388                 }
 389
 390                 if ( !$user || $user->isAnon() ) {
 391                         return Status::newFatal( 'nosuchusershort', $username );
 392                 }
 393
 394                 return Status::newGood( $user );
 395         }
 396
 397         function makeGroupNameList( $ids ) {
 398                 if ( empty( $ids ) ) {
 399                         return $this->msg( 'rightsnone' )->inContentLanguage()->text();
 400                 } else {
 401                         return implode( ', ', $ids );
 402                 }
 403         }
 404
 405         /**
 406          * Make a list of group names to be stored as parameter for log entries
 407          *
 408          * @deprecated since 1.21; use LogFormatter instead.
 409          * @param array $ids
 410          * @return string
 411          */
 412         function makeGroupNameListForLog( $ids ) {
 413                 wfDeprecated( __METHOD__, '1.21' );
 414
 415                 if ( empty( $ids ) ) {
 416                         return '';
 417                 } else {
 418                         return $this->makeGroupNameList( $ids );
 419                 }
 420         }
 421
 422         /**
 423          * Output a form to allow searching for a user
 424          */
 425         function switchForm() {
 426                 $this->getOutput()->addModules( 'mediawiki.userSuggest' );
 427
 428                 $this->getOutput()->addHTML(
 429                         Html::openElement(
 430                                 'form',
 431                                 array(
 432                                         'method' => 'get',
 433                                         'action' => wfScript(),
 434                                         'name' => 'uluser',
 435                                         'id' => 'mw-userrights-form1'
 436                                 )
 437                         ) .
 438                         Html::hidden( 'title', $this->getPageTitle()->getPrefixedText() ) .
 439                         Xml::fieldset( $this->msg( 'userrights-lookup-user' )->text() ) .
 440                         Xml::inputLabel(
 441                                 $this->msg( 'userrights-user-editname' )->text(),
 442                                 'user',
 443                                 'username',
 444                                 30,
 445                                 str_replace( '_', ' ', $this->mTarget ),
 446                                 array(
 447                                         'autofocus' => '',
 448                                         'class' => 'mw-autocomplete-user', // used by mediawiki.userSuggest
 449                                 )
 450                         ) . ' ' .
 451                         Xml::submitButton( $this->msg( 'editusergroup' )->text() ) .
 452                         Html::closeElement( 'fieldset' ) .
 453                         Html::closeElement( 'form' ) . "\n"
 454                 );
 455         }
 456
 457         /**
 458          * Go through used and available groups and return the ones that this
 459          * form will be able to manipulate based on the current user's system
 460          * permissions.
 461          *
 462          * @param array $groups List of groups the given user is in
 463          * @return array Tuple of addable, then removable groups
 464          */
 465         protected function splitGroups( $groups ) {
 466                 list( $addable, $removable, $addself, $removeself ) = array_values( $this->changeableGroups() );
 467
 468                 $removable = array_intersect(
 469                         array_merge( $this->isself ? $removeself : array(), $removable ),
 470                         $groups
 471                 ); // Can't remove groups the user doesn't have
 472                 $addable = array_diff(
 473                         array_merge( $this->isself ? $addself : array(), $addable ),
 474                         $groups
 475                 ); // Can't add groups the user does have
 476
 477                 return array( $addable, $removable );
 478         }
 479
 480         /**
 481          * Show the form to edit group memberships.
 482          *
 483          * @param User|UserRightsProxy $user User or UserRightsProxy you're editing
 484          * @param array $groups Array of groups the user is in
 485          */
 486         protected function showEditUserGroupsForm( $user, $groups ) {
 487                 $list = array();
 488                 $membersList = array();
 489                 foreach ( $groups as $group ) {
 490                         $list[] = self::buildGroupLink( $group );
 491                         $membersList[] = self::buildGroupMemberLink( $group );
 492                 }
 493
 494                 $autoList = array();
 495                 $autoMembersList = array();
 496                 if ( $user instanceof User ) {
 497                         foreach ( Autopromote::getAutopromoteGroups( $user ) as $group ) {
 498                                 $autoList[] = self::buildGroupLink( $group );
 499                                 $autoMembersList[] = self::buildGroupMemberLink( $group );
 500                         }
 501                 }
 502
 503                 $language = $this->getLanguage();
 504                 $displayedList = $this->msg( 'userrights-groupsmember-type' )
 505                         ->rawParams(
 506                                 $language->listToText( $list ),
 507                                 $language->listToText( $membersList )
 508                         )->escaped();
 509                 $displayedAutolist = $this->msg( 'userrights-groupsmember-type' )
 510                         ->rawParams(
 511                                 $language->listToText( $autoList ),
 512                                 $language->listToText( $autoMembersList )
 513                         )->escaped();
 514
 515                 $grouplist = '';
 516                 $count = count( $list );
 517                 if ( $count > 0 ) {
 518                         $grouplist = $this->msg( 'userrights-groupsmember' )
 519                                 ->numParams( $count )
 520                                 ->params( $user->getName() )
 521                                 ->parse();
 522                         $grouplist = '<p>' . $grouplist . ' ' . $displayedList . "</p>\n";
 523                 }
 524
 525                 $count = count( $autoList );
 526                 if ( $count > 0 ) {
 527                         $autogrouplistintro = $this->msg( 'userrights-groupsmember-auto' )
 528                                 ->numParams( $count )
 529                                 ->params( $user->getName() )
 530                                 ->parse();
 531                         $grouplist .= '<p>' . $autogrouplistintro . ' ' . $displayedAutolist . "</p>\n";
 532                 }
 533
 534                 $userToolLinks = Linker::userToolLinks(
 535                         $user->getId(),
 536                         $user->getName(),
 537                         false, /* default for redContribsWhenNoEdits */
 538                         Linker::TOOL_LINKS_EMAIL /* Add "send e-mail" link */
 539                 );
 540
 541                 $this->getOutput()->addHTML(
 542                         Xml::openElement(
 543                                 'form',
 544                                 array(
 545                                         'method' => 'post',
 546                                         'action' => $this->getPageTitle()->getLocalURL(),
 547                                         'name' => 'editGroup',
 548                                         'id' => 'mw-userrights-form2'
 549                                 )
 550                         ) .
 551                         Html::hidden( 'user', $this->mTarget ) .
 552                         Html::hidden( 'wpEditToken', $this->getUser()->getEditToken( $this->mTarget ) ) .
 553                         Html::hidden(
 554                                 'conflictcheck-originalgroups',
 555                                 implode( ',', $user->getGroups() )
 556                         ) . // Conflict detection
 557                         Xml::openElement( 'fieldset' ) .
 558                         Xml::element(
 559                                 'legend',
 560                                 array(),
 561                                 $this->msg( 'userrights-editusergroup', $user->getName() )->text()
 562                         ) .
 563                         $this->msg( 'editinguser' )->params( wfEscapeWikiText( $user->getName() ) )
 564                                 ->rawParams( $userToolLinks )->parse() .
 565                         $this->msg( 'userrights-groups-help', $user->getName() )->parse() .
 566                         $grouplist .
 567                         $this->groupCheckboxes( $groups, $user ) .
 568                         Xml::openElement( 'table', array( 'id' => 'mw-userrights-table-outer' ) ) .
 569                                 "<tr>
 570                                         <td class='mw-label'>" .
 571                                                 Xml::label( $this->msg( 'userrights-reason' )->text(), 'wpReason' ) .
 572                                         "</td>
 573                                         <td class='mw-input'>" .
 574                                                 Xml::input( 'user-reason', 60, $this->getRequest()->getVal( 'user-reason', false ),
 575                                                         array( 'id' => 'wpReason', 'maxlength' => 255 ) ) .
 576                                         "</td>
 577                                 </tr>
 578                                 <tr>
 579                                         <td></td>
 580                                         <td class='mw-submit'>" .
 581                                                 Xml::submitButton( $this->msg( 'saveusergroups' )->text(),
 582                                                         array( 'name' => 'saveusergroups' ) +
 583                                                                 Linker::tooltipAndAccesskeyAttribs( 'userrights-set' )
 584                                                 ) .
 585                                         "</td>
 586                                 </tr>" .
 587                         Xml::closeElement( 'table' ) . "\n" .
 588                         Xml::closeElement( 'fieldset' ) .
 589                         Xml::closeElement( 'form' ) . "\n"
 590                 );
 591         }
 592
 593         /**
 594          * Format a link to a group description page
 595          *
 596          * @param string $group
 597          * @return string
 598          */
 599         private static function buildGroupLink( $group ) {
 600                 return User::makeGroupLinkHtml( $group, User::getGroupName( $group ) );
 601         }
 602
 603         /**
 604          * Format a link to a group member description page
 605          *
 606          * @param string $group
 607          * @return string
 608          */
 609         private static function buildGroupMemberLink( $group ) {
 610                 return User::makeGroupLinkHtml( $group, User::getGroupMember( $group ) );
 611         }
 612
 613         /**
 614          * Returns an array of all groups that may be edited
 615          * @return array Array of groups that may be edited.
 616          */
 617         protected static function getAllGroups() {
 618                 return User::getAllGroups();
 619         }
 620
 621         /**
 622          * Adds a table with checkboxes where you can select what groups to add/remove
 623          *
 624          * @todo Just pass the username string?
 625          * @param array $usergroups Groups the user belongs to
 626          * @param User $user
 627          * @return string XHTML table element with checkboxes
 628          */
 629         private function groupCheckboxes( $usergroups, $user ) {
 630                 $allgroups = $this->getAllGroups();
 631                 $ret = '';
 632
 633                 // Put all column info into an associative array so that extensions can
 634                 // more easily manage it.
 635                 $columns = array( 'unchangeable' => array(), 'changeable' => array() );
 636
 637                 foreach ( $allgroups as $group ) {
 638                         $set = in_array( $group, $usergroups );
 639                         // Should the checkbox be disabled?
 640                         $disabled = !(
 641                                 ( $set && $this->canRemove( $group ) ) ||
 642                                 ( !$set && $this->canAdd( $group ) ) );
 643                         // Do we need to point out that this action is irreversible?
 644                         $irreversible = !$disabled && (
 645                                 ( $set && !$this->canAdd( $group ) ) ||
 646                                 ( !$set && !$this->canRemove( $group ) ) );
 647
 648                         $checkbox = array(
 649                                 'set' => $set,
 650                                 'disabled' => $disabled,
 651                                 'irreversible' => $irreversible
 652                         );
 653
 654                         if ( $disabled ) {
 655                                 $columns['unchangeable'][$group] = $checkbox;
 656                         } else {
 657                                 $columns['changeable'][$group] = $checkbox;
 658                         }
 659                 }
 660
 661                 // Build the HTML table
 662                 $ret .= Xml::openElement( 'table', array( 'class' => 'mw-userrights-groups' ) ) .
 663                         "<tr>\n";
 664                 foreach ( $columns as $name => $column ) {
 665                         if ( $column === array() ) {
 666                                 continue;
 667                         }
 668                         // Messages: userrights-changeable-col, userrights-unchangeable-col
 669                         $ret .= Xml::element(
 670                                 'th',
 671                                 null,
 672                                 $this->msg( 'userrights-' . $name . '-col', count( $column ) )->text()
 673                         );
 674                 }
 675
 676                 $ret .= "</tr>\n<tr>\n";
 677                 foreach ( $columns as $column ) {
 678                         if ( $column === array() ) {
 679                                 continue;
 680                         }
 681                         $ret .= "\t<td style='vertical-align:top;'>\n";
 682                         foreach ( $column as $group => $checkbox ) {
 683                                 $attr = $checkbox['disabled'] ? array( 'disabled' => 'disabled' ) : array();
 684
 685                                 $member = User::getGroupMember( $group, $user->getName() );
 686                                 if ( $checkbox['irreversible'] ) {
 687                                         $text = $this->msg( 'userrights-irreversible-marker', $member )->text();
 688                                 } else {
 689                                         $text = $member;
 690                                 }
 691                                 $checkboxHtml = Xml::checkLabel( $text, "wpGroup-" . $group,
 692                                         "wpGroup-" . $group, $checkbox['set'], $attr );
 693                                 $ret .= "\t\t" . ( $checkbox['disabled']
 694                                         ? Xml::tags( 'span', array( 'class' => 'mw-userrights-disabled' ), $checkboxHtml )
 695                                         : $checkboxHtml
 696                                 ) . "<br />\n";
 697                         }
 698                         $ret .= "\t</td>\n";
 699                 }
 700                 $ret .= Xml::closeElement( 'tr' ) . Xml::closeElement( 'table' );
 701
 702                 return $ret;
 703         }
 704
 705         /**
 706          * @param string $group The name of the group to check
 707          * @return bool Can we remove the group?
 708          */
 709         private function canRemove( $group ) {
 710                 // $this->changeableGroups()['remove'] doesn't work, of course. Thanks, PHP.
 711                 $groups = $this->changeableGroups();
 712
 713                 return in_array(
 714                         $group,
 715                         $groups['remove'] ) || ( $this->isself && in_array( $group, $groups['remove-self'] )
 716                 );
 717         }
 718
 719         /**
 720          * @param string $group The name of the group to check
 721          * @return bool Can we add the group?
 722          */
 723         private function canAdd( $group ) {
 724                 $groups = $this->changeableGroups();
 725
 726                 return in_array(
 727                         $group,
 728                         $groups['add'] ) || ( $this->isself && in_array( $group, $groups['add-self'] )
 729                 );
 730         }
 731
 732         /**
 733          * Returns $this->getUser()->changeableGroups()
 734          *
 735          * @return array Array(
 736          *   'add' => array( addablegroups ),
 737          *   'remove' => array( removablegroups ),
 738          *   'add-self' => array( addablegroups to self ),
 739          *   'remove-self' => array( removable groups from self )
 740          *  )
 741          */
 742         function changeableGroups() {
 743                 return $this->getUser()->changeableGroups();
 744         }
 745
 746         /**
 747          * Show a rights log fragment for the specified user
 748          *
 749          * @param User $user User to show log for
 750          * @param OutputPage $output OutputPage to use
 751          */
 752         protected function showLogFragment( $user, $output ) {
 753                 $rightsLogPage = new LogPage( 'rights' );
 754                 $output->addHTML( Xml::element( 'h2', null, $rightsLogPage->getName()->text() ) );
 755                 LogEventsList::showLogExtract( $output, 'rights', $user->getUserPage() );
 756         }
 757
 758         protected function getGroupName() {
 759                 return 'users';
 760         }
 761 }