includes/SpecialUserrights.php

   1 <?php
   2
   3 /**
   4  * Special page to allow managing user group membership
   5  *
   6  * @addtogroup SpecialPage
   7  */
   8
   9 /**
  10  * A class to manage user levels rights.
  11  * @addtogroup SpecialPage
  12  */
  13 class UserrightsPage extends SpecialPage {
  14         # The target of the local right-adjuster's interest.  Can be gotten from
  15         # either a GET parameter or a subpage-style parameter, so have a member
  16         # variable for it.
  17         protected $mTarget;
  18         protected $isself = false;
  19
  20         public function __construct() {
  21                 parent::__construct( 'Userrights' );
  22         }
  23
  24         public function isRestricted() {
  25                 return true;
  26         }
  27
  28         public function userCanExecute( $user ) {
  29                 $available = $this->changeableGroups();
  30                 return !empty( $available['add'] )
  31                         or !empty( $available['remove'] )
  32                         or ($this->isself and
  33                                 (!empty( $available['add-self'] )
  34                                  or !empty( $available['remove-self'] )));
  35         }
  36
  37         /**
  38          * Manage forms to be shown according to posted data.
  39          * Depending on the submit button used, call a form or a save function.
  40          *
  41          * @param mixed $par String if any subpage provided, else null
  42          */
  43         function execute( $par ) {
  44                 // If the visitor doesn't have permissions to assign or remove
  45                 // any groups, it's a bit silly to give them the user search prompt.
  46                 global $wgUser, $wgRequest;
  47
  48                 if( $par ) {
  49                         $this->mTarget = $par;
  50                 } else {
  51                         $this->mTarget = $wgRequest->getVal( 'user' );
  52                 }
  53
  54                 if (!$this->mTarget) {
  55                         /*
  56                          * If the user specified no target, and they can only
  57                          * edit their own groups, automatically set them as the
  58                          * target.
  59                          */
  60                         $available = $this->changeableGroups();
  61                         if (empty($available['add']) && empty($available['remove']))
  62                                 $this->mTarget = $wgUser->getName();
  63                 }
  64
  65                 if ($this->mTarget == $wgUser->getName())
  66                         $this->isself = true;
  67
  68                 if( !$this->userCanExecute( $wgUser ) ) {
  69                         // fixme... there may be intermediate groups we can mention.
  70                         global $wgOut;
  71                         $wgOut->showPermissionsErrorPage( array(
  72                                 $wgUser->isAnon()
  73                                         ? 'userrights-nologin'
  74                                         : 'userrights-notallowed' ) );
  75                         return;
  76                 }
  77
  78                 if ( wfReadOnly() ) {
  79                         global $wgOut;
  80                         $wgOut->readOnlyPage();
  81                         return;
  82                 }
  83
  84                 $this->outputHeader();
  85
  86                 $this->setHeaders();
  87
  88                 // show the general form
  89                 $this->switchForm();
  90
  91                 if( $wgRequest->wasPosted() ) {
  92                         // save settings
  93                         if( $wgRequest->getCheck( 'saveusergroups' ) ) {
  94                                 $reason = $wgRequest->getVal( 'user-reason' );
  95                                 if( $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ), $this->mTarget ) ) {
  96                                         $this->saveUserGroups(
  97                                                 $this->mTarget,
  98                                                 $reason
  99                                         );
 100                                 }
 101                         }
 102                 }
 103
 104                 // show some more forms
 105                 if( $this->mTarget ) {
 106                         $this->editUserGroupsForm( $this->mTarget );
 107                 }
 108         }
 109
 110         /**
 111          * Save user groups changes in the database.
 112          * Data comes from the editUserGroupsForm() form function
 113          *
 114          * @param string $username Username to apply changes to.
 115          * @param string $reason Reason for group change
 116          * @return null
 117          */
 118         function saveUserGroups( $username, $reason = '') {
 119                 global $wgRequest, $wgUser, $wgGroupsAddToSelf, $wgGroupsRemoveFromSelf;
 120
 121                 $user = $this->fetchUser( $username );
 122                 if( !$user ) {
 123                         return;
 124                 }
 125
 126                 $allgroups = $this->getAllGroups();
 127                 $addgroup = array();
 128                 $removegroup = array();
 129
 130                 // This could possibly create a highly unlikely race condition if permissions are changed between
 131                 //  when the form is loaded and when the form is saved. Ignoring it for the moment.
 132                 foreach ($allgroups as $group) {
 133                         // We'll tell it to remove all unchecked groups, and add all checked groups.
 134                         // Later on, this gets filtered for what can actually be removed
 135                         if ($wgRequest->getCheck( "wpGroup-$group" )) {
 136                                 $addgroup[] = $group;
 137                         } else {
 138                                 $removegroup[] = $group;
 139                         }
 140                 }
 141
 142                 // Validate input set...
 143                 $changeable = $this->changeableGroups();
 144                 if ($wgUser->getId() != 0 && $wgUser->getId() == $user->getId()) {
 145                         $addable = array_merge($changeable['add'], $wgGroupsAddToSelf);
 146                         $removable = array_merge($changeable['remove'], $wgGroupsRemoveFromSelf);
 147                 } else {
 148                         $addable = $changeable['add'];
 149                         $removable = $changeable['remove'];
 150                 }
 151
 152                 $removegroup = array_unique(
 153                         array_intersect( (array)$removegroup, $removable ) );
 154                 $addgroup = array_unique(
 155                         array_intersect( (array)$addgroup, $addable ) );
 156
 157                 $oldGroups = $user->getGroups();
 158                 $newGroups = $oldGroups;
 159                 // remove then add groups
 160                 if( $removegroup ) {
 161                         $newGroups = array_diff($newGroups, $removegroup);
 162                         foreach( $removegroup as $group ) {
 163                                 $user->removeGroup( $group );
 164                         }
 165                 }
 166                 if( $addgroup ) {
 167                         $newGroups = array_merge($newGroups, $addgroup);
 168                         foreach( $addgroup as $group ) {
 169                                 $user->addGroup( $group );
 170                         }
 171                 }
 172                 $newGroups = array_unique( $newGroups );
 173
 174                 // Ensure that caches are cleared
 175                 $user->invalidateCache();
 176
 177                 wfDebug( 'oldGroups: ' . print_r( $oldGroups, true ) );
 178                 wfDebug( 'newGroups: ' . print_r( $newGroups, true ) );
 179                 if( $user instanceof User ) {
 180                         // hmmm
 181                         wfRunHooks( 'UserRights', array( &$user, $addgroup, $removegroup ) );
 182                 }
 183
 184                 if( $newGroups != $oldGroups ) {
 185                         $this->addLogEntry( $user, $oldGroups, $newGroups );
 186                 }
 187         }
 188
 189         /**
 190          * Add a rights log entry for an action.
 191          */
 192         function addLogEntry( $user, $oldGroups, $newGroups ) {
 193                 global $wgRequest;
 194                 $log = new LogPage( 'rights' );
 195
 196                 $log->addEntry( 'rights',
 197                         $user->getUserPage(),
 198                         $wgRequest->getText( 'user-reason' ),
 199                         array(
 200                                 $this->makeGroupNameList( $oldGroups ),
 201                                 $this->makeGroupNameList( $newGroups )
 202                         )
 203                 );
 204         }
 205
 206         /**
 207          * Edit user groups membership
 208          * @param string $username Name of the user.
 209          */
 210         function editUserGroupsForm( $username ) {
 211                 global $wgOut;
 212
 213                 $user = $this->fetchUser( $username );
 214                 if( !$user ) {
 215                         return;
 216                 }
 217
 218                 $groups = $user->getGroups();
 219
 220                 $this->showEditUserGroupsForm( $user, $groups );
 221
 222                 // This isn't really ideal logging behavior, but let's not hide the
 223                 // interwiki logs if we're using them as is.
 224                 $this->showLogFragment( $user, $wgOut );
 225         }
 226
 227         /**
 228          * Normalize the input username, which may be local or remote, and
 229          * return a user (or proxy) object for manipulating it.
 230          *
 231          * Side effects: error output for invalid access
 232          * @return mixed User, UserRightsProxy, or null
 233          */
 234         function fetchUser( $username ) {
 235                 global $wgOut, $wgUser;
 236
 237                 $parts = explode( '@', $username );
 238                 if( count( $parts ) < 2 ) {
 239                         $name = trim( $username );
 240                         $database = '';
 241                 } else {
 242                         list( $name, $database ) = array_map( 'trim', $parts );
 243
 244                         if( !$wgUser->isAllowed( 'userrights-interwiki' ) ) {
 245                                 $wgOut->addWikiMsg( 'userrights-no-interwiki' );
 246                                 return null;
 247                         }
 248                         if( !UserRightsProxy::validDatabase( $database ) ) {
 249                                 $wgOut->addWikiMsg( 'userrights-nodatabase', $database );
 250                                 return null;
 251                         }
 252                 }
 253
 254                 if( $name == '' ) {
 255                         $wgOut->addWikiMsg( 'nouserspecified' );
 256                         return false;
 257                 }
 258
 259                 if( $name{0} == '#' ) {
 260                         // Numeric ID can be specified...
 261                         // We'll do a lookup for the name internally.
 262                         $id = intval( substr( $name, 1 ) );
 263
 264                         if( $database == '' ) {
 265                                 $name = User::whoIs( $id );
 266                         } else {
 267                                 $name = UserRightsProxy::whoIs( $database, $id );
 268                         }
 269
 270                         if( !$name ) {
 271                                 $wgOut->addWikiMsg( 'noname' );
 272                                 return null;
 273                         }
 274                 }
 275
 276                 if( $database == '' ) {
 277                         $user = User::newFromName( $name );
 278                 } else {
 279                         $user = UserRightsProxy::newFromName( $database, $name );
 280                 }
 281
 282                 if( !$user || $user->isAnon() ) {
 283                         $wgOut->addWikiMsg( 'nosuchusershort', $username );
 284                         return null;
 285                 }
 286
 287                 return $user;
 288         }
 289
 290         function makeGroupNameList( $ids ) {
 291                 return implode( ', ', $ids );
 292         }
 293
 294         /**
 295          * Output a form to allow searching for a user
 296          */
 297         function switchForm() {
 298                 global $wgOut, $wgScript;
 299                 $wgOut->addHTML(
 300                         Xml::openElement( 'form', array( 'method' => 'get', 'action' => $wgScript, 'name' => 'uluser', 'id' => 'mw-userrights-form1' ) ) .
 301                         Xml::hidden( 'title',  $this->getTitle()->getPrefixedText() ) .
 302                         Xml::openElement( 'fieldset' ) .
 303                         Xml::element( 'legend', array(), wfMsg( 'userrights-lookup-user' ) ) .
 304                         Xml::inputLabel( wfMsg( 'userrights-user-editname' ), 'user', 'username', 30, $this->mTarget ) . ' ' .
 305                         Xml::submitButton( wfMsg( 'editusergroup' ) ) .
 306                         Xml::closeElement( 'fieldset' ) .
 307                         Xml::closeElement( 'form' ) . "\n"
 308                 );
 309         }
 310
 311         /**
 312          * Go through used and available groups and return the ones that this
 313          * form will be able to manipulate based on the current user's system
 314          * permissions.
 315          *
 316          * @param $groups Array: list of groups the given user is in
 317          * @return Array:  Tuple of addable, then removable groups
 318          */
 319         protected function splitGroups( $groups ) {
 320                 global $wgGroupsAddToSelf, $wgGroupsRemoveFromSelf;
 321                 list($addable, $removable) = array_values( $this->changeableGroups() );
 322
 323                 $removable = array_intersect(
 324                                 array_merge($this->isself ? $wgGroupsRemoveFromSelf : array(), $removable),
 325                                 $groups ); // Can't remove groups the user doesn't have
 326                 $addable   = array_diff(
 327                                 array_merge($this->isself ? $wgGroupsAddToSelf : array(), $addable),
 328                                 $groups ); // Can't add groups the user does have
 329
 330                 return array( $addable, $removable );
 331         }
 332
 333         /**
 334          * Show the form to edit group memberships.
 335          *
 336          * @param $user      User or UserRightsProxy you're editing
 337          * @param $groups    Array:  Array of groups the user is in
 338          */
 339         protected function showEditUserGroupsForm( $user, $groups ) {
 340                 global $wgOut, $wgUser;
 341
 342                 list( $addable, $removable ) = $this->splitGroups( $groups );
 343
 344                 $list = array();
 345                 foreach( $user->getGroups() as $group )
 346                         $list[] = self::buildGroupLink( $group );
 347
 348                 $grouplist = '';
 349                 if( count( $list ) > 0 ) {
 350                         $grouplist = Xml::tags( 'p', null, wfMsgHtml( 'userrights-groupsmember' ) . ' ' . implode( ', ', $list ) );
 351                 }
 352                 $wgOut->addHTML(
 353                         Xml::openElement( 'form', array( 'method' => 'post', 'action' => $this->getTitle()->getLocalURL(), 'name' => 'editGroup', 'id' => 'mw-userrights-form2' ) ) .
 354                         Xml::hidden( 'user', $this->mTarget ) .
 355                         Xml::hidden( 'wpEditToken', $wgUser->editToken( $this->mTarget ) ) .
 356                         Xml::openElement( 'fieldset' ) .
 357                         Xml::element( 'legend', array(), wfMsg( 'userrights-editusergroup' ) ) .
 358                         wfMsgExt( 'editinguser', array( 'parse' ), wfEscapeWikiText( $user->getName() ) ) .
 359                         wfMsgExt( 'userrights-groups-help', array( 'parse' ) ) .
 360                         $grouplist .
 361                         Xml::tags( 'p', null, $this->groupCheckboxes( $groups ) ) .
 362                         Xml::openElement( 'table', array( 'border' => '0', 'id' => 'mw-userrights-table-outer' ) ) .
 363                                 "<tr>
 364                                         <td class='mw-label'>" .
 365                                                 Xml::label( wfMsg( 'userrights-reason' ), 'wpReason' ) .
 366                                         "</td>
 367                                         <td class='mw-input'>" .
 368                                                 Xml::input( 'user-reason', 60, false, array( 'id' => 'wpReason', 'maxlength' => 255 ) ) .
 369                                         "</td>
 370                                 </tr>
 371                                 <tr>
 372                                         <td></td>
 373                                         <td class='mw-submit'>" .
 374                                                 Xml::submitButton( wfMsg( 'saveusergroups' ), array( 'name' => 'saveusergroups' ) ) .
 375                                         "</td>
 376                                 </tr>" .
 377                         Xml::closeElement( 'table' ) . "\n" .
 378                         Xml::closeElement( 'fieldset' ) .
 379                         Xml::closeElement( 'form' ) . "\n"
 380                 );
 381         }
 382
 383         /**
 384          * Format a link to a group description page
 385          *
 386          * @param string $group
 387          * @return string
 388          */
 389         private static function buildGroupLink( $group ) {
 390                 static $cache = array();
 391                 if( !isset( $cache[$group] ) )
 392                         $cache[$group] = User::makeGroupLinkHtml( $group, User::getGroupName( $group ) );
 393                 return $cache[$group];
 394         }
 395
 396         /**
 397          * Returns an array of all groups that may be edited
 398          * @return array Array of groups that may be edited.
 399          */
 400          protected static function getAllGroups() {
 401                 return User::getAllGroups();
 402          }
 403
 404         /**
 405          * Adds the <select> thingie where you can select what groups to add/remove
 406          *
 407          * @param array  $groups The groups that can be added/removed
 408          * @param string $name   'removable' or 'available'
 409          * @return string XHTML <select> element
 410          */
 411         private function groupCheckboxes( $usergroups ) {
 412                 $allgroups = $this->getAllGroups();
 413                 $ret = '';
 414
 415                 $column = 1;
 416                 $settable_col = '';
 417                 $unsettable_col = '';
 418
 419                 foreach ($allgroups as $group) {
 420                         $set = in_array( $group, $usergroups );
 421                         # Should the checkbox be disabled?
 422                         $disabled = !(
 423                                 ( $set && $this->canRemove( $group ) ) ||
 424                                 ( !$set && $this->canAdd( $group ) ) );
 425                         # Do we need to point out that this action is irreversible?
 426                         $irreversible = !$disabled && (
 427                                 ($set && !$this->canAdd( $group )) ||
 428                                 (!$set && !$this->canRemove( $group ) ) );
 429
 430                         $attr = $disabled ? array( 'disabled' => 'disabled' ) : array();
 431                         $text = $irreversible
 432                                 ? wfMsgHtml( 'userrights-irreversible-marker', User::getGroupMember( $group ) )
 433                                 : User::getGroupMember( $group );
 434                         $checkbox = Xml::checkLabel( $text, "wpGroup-$group",
 435                                 "wpGroup-$group", $set, $attr );
 436                         $checkbox = $disabled ? Xml::tags( 'span', array( 'class' => 'mw-userrights-disabled' ), $checkbox ) : $checkbox;
 437
 438                         if ($disabled) {
 439                                 $unsettable_col .= "$checkbox<br />\n";
 440                         } else {
 441                                 $settable_col .= "$checkbox<br />\n";
 442                         }
 443                 }
 444
 445                 if ($column) {
 446                         $ret .= Xml::openElement( 'table', array( 'border' => '0', 'class' => 'mw-userrights-groups' ) ) .
 447                                 "<tr>
 448 ";
 449                         if( $settable_col !== '' ) {
 450                                 $ret .= xml::element( 'th', null, wfMsg( 'userrights-changeable-col' ) );
 451                         }
 452                         if( $unsettable_col !== '' ) {
 453                                 $ret .= xml::element( 'th', null, wfMsg( 'userrights-unchangeable-col' ) );
 454                         }
 455                         $ret.= "</tr>
 456                                 <tr>
 457 ";
 458                         if( $settable_col !== '' ) {
 459                                 $ret .=
 460 "                                       <td style='vertical-align:top;'>
 461                                                 $settable_col
 462                                         </td>
 463 ";
 464                         }
 465                         if( $unsettable_col !== '' ) {
 466                                 $ret .=
 467 "                                       <td style='vertical-align:top;'>
 468                                                 $unsettable_col
 469                                         </td>
 470 ";
 471                         }
 472                         $ret .= Xml::closeElement( 'tr' ) . Xml::closeElement( 'table' );
 473                 }
 474
 475                 return $ret;
 476         }
 477
 478         /**
 479          * @param  string $group The name of the group to check
 480          * @return bool Can we remove the group?
 481          */
 482         private function canRemove( $group ) {
 483                 // $this->changeableGroups()['remove'] doesn't work, of course. Thanks,
 484                 // PHP.
 485                 $groups = $this->changeableGroups();
 486                 return in_array( $group, $groups['remove'] ) || ($this->isself && in_array( $group, $groups['remove-self'] ));
 487         }
 488
 489         /**
 490          * @param  string $group The name of the group to check
 491          * @return bool Can we add the group?
 492          */
 493         private function canAdd( $group ) {
 494                 $groups = $this->changeableGroups();
 495                 return in_array( $group, $groups['add'] ) || ($this->isself && in_array( $group, $groups['add-self'] ));
 496         }
 497
 498         /**
 499          * Returns an array of the groups that the user can add/remove.
 500          *
 501          * @return Array array( 'add' => array( addablegroups ), 'remove' => array( removablegroups ) )
 502          */
 503         function changeableGroups() {
 504                 global $wgUser, $wgGroupsAddToSelf, $wgGroupsRemoveFromSelf;
 505
 506                 if( $wgUser->isAllowed( 'userrights' ) ) {
 507                         // This group gives the right to modify everything (reverse-
 508                         // compatibility with old "userrights lets you change
 509                         // everything")
 510                         // Using array_merge to make the groups reindexed
 511                         $all = array_merge( User::getAllGroups() );
 512                         return array(
 513                                 'add' => $all,
 514                                 'remove' => $all,
 515                                 'add-self' => array(),
 516                                 'remove-self' => array()
 517                         );
 518                 }
 519
 520                 // Okay, it's not so simple, we will have to go through the arrays
 521                 $groups = array(
 522                                 'add' => array(),
 523                                 'remove' => array(),
 524                                 'add-self' => $wgGroupsAddToSelf,
 525                                 'remove-self' => $wgGroupsRemoveFromSelf);
 526                 $addergroups = $wgUser->getEffectiveGroups();
 527
 528                 foreach ($addergroups as $addergroup) {
 529                         $groups = array_merge_recursive(
 530                                 $groups, $this->changeableByGroup($addergroup)
 531                         );
 532                         $groups['add']    = array_unique( $groups['add'] );
 533                         $groups['remove'] = array_unique( $groups['remove'] );
 534                 }
 535                 return $groups;
 536         }
 537
 538         /**
 539          * Returns an array of the groups that a particular group can add/remove.
 540          *
 541          * @param String $group The group to check for whether it can add/remove
 542          * @return Array array( 'add' => array( addablegroups ), 'remove' => array( removablegroups ) )
 543          */
 544         private function changeableByGroup( $group ) {
 545                 global $wgAddGroups, $wgRemoveGroups;
 546
 547                 $groups = array( 'add' => array(), 'remove' => array() );
 548                 if( empty($wgAddGroups[$group]) ) {
 549                         // Don't add anything to $groups
 550                 } elseif( $wgAddGroups[$group] === true ) {
 551                         // You get everything
 552                         $groups['add'] = User::getAllGroups();
 553                 } elseif( is_array($wgAddGroups[$group]) ) {
 554                         $groups['add'] = $wgAddGroups[$group];
 555                 }
 556
 557                 // Same thing for remove
 558                 if( empty($wgRemoveGroups[$group]) ) {
 559                 } elseif($wgRemoveGroups[$group] === true ) {
 560                         $groups['remove'] = User::getAllGroups();
 561                 } elseif( is_array($wgRemoveGroups[$group]) ) {
 562                         $groups['remove'] = $wgRemoveGroups[$group];
 563                 }
 564                 return $groups;
 565         }
 566
 567         /**
 568          * Show a rights log fragment for the specified user
 569          *
 570          * @param User $user User to show log for
 571          * @param OutputPage $output OutputPage to use
 572          */
 573         protected function showLogFragment( $user, $output ) {
 574                 $output->addHtml( Xml::element( 'h2', null, LogPage::logName( 'rights' ) . "\n" ) );
 575                 LogEventsList::showLogExtract( $output, 'rights', $user->getUserPage()->getPrefixedText() );
 576         }
 577 }