includes/SpecialUserrights.php

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