includes/specials/SpecialBlock.php

   1 <?php
   2 /**
   3  * Implements Special:Block
   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  * A special page that allows users with 'block' right to block users from
  26  * editing pages and other actions
  27  *
  28  * @ingroup SpecialPage
  29  */
  30 class SpecialBlock extends SpecialPage {
  31
  32         /** The maximum number of edits a user can have and still be hidden
  33          * TODO: config setting? */
  34         const HIDEUSER_CONTRIBLIMIT = 1000;
  35
  36         /** @var User user to be blocked, as passed either by parameter (url?wpTarget=Foo)
  37          * or as subpage (Special:Block/Foo) */
  38         protected $target;
  39
  40         /// @var Block::TYPE_ constant
  41         protected $type;
  42
  43         /// @var Bool
  44         protected $alreadyBlocked;
  45
  46         public function __construct() {
  47                 parent::__construct( 'Block', 'block' );
  48         }
  49
  50         public function execute( $par ) {
  51                 global $wgUser, $wgOut, $wgRequest;
  52
  53                 # Can't block when the database is locked
  54                 if( wfReadOnly() ) {
  55                         $wgOut->readOnlyPage();
  56                         return;
  57                 }
  58                 # Permission check
  59                 if( !$this->userCanExecute( $wgUser ) ) {
  60                         $wgOut->permissionRequired( 'block' );
  61                         return;
  62                 }
  63
  64                 # Extract variables from the request.  Try not to get into a situation where we
  65                 # need to extract *every* variable from the form just for processing here, but
  66                 # there are legitimate uses for some variables
  67                 list( $this->target, $this->type ) = self::getTargetAndType( $par, $wgRequest );
  68                 if ( $this->target instanceof User ) {
  69                         # Set the 'relevant user' in the skin, so it displays links like Contributions,
  70                         # User logs, UserRights, etc.
  71                         $wgUser->getSkin()->setRelevantUser( $this->target );
  72                 }
  73
  74                 # bug 15810: blocked admins should have limited access here
  75                 $status = self::checkUnblockSelf( $this->target );
  76                 if ( $status !== true ) {
  77                         throw new ErrorPageError( 'badaccess', $status );
  78                 }
  79
  80                 $wgOut->setPageTitle( wfMsg( 'blockip-title' ) );
  81                 $wgOut->addModules( 'mediawiki.special', 'mediawiki.special.block' );
  82
  83                 $fields = self::getFormFields();
  84                 $this->alreadyBlocked = $this->maybeAlterFormDefaults( $fields );
  85
  86                 $form = new HTMLForm( $fields );
  87                 $form->setTitle( $this->getTitle() );
  88                 $form->setWrapperLegend( wfMsg( 'blockip-legend' ) );
  89                 $form->setSubmitCallback( array( __CLASS__, 'processForm' ) );
  90
  91                 $t = $this->alreadyBlocked
  92                         ? wfMsg( 'ipb-change-block' )
  93                         : wfMsg( 'ipbsubmit' );
  94                 $form->setSubmitText( $t );
  95
  96                 $this->doPreText( $form );
  97                 $this->doPostText( $form );
  98
  99                 if( $form->show() ){
 100                         $wgOut->setPageTitle( wfMsg( 'blockipsuccesssub' ) );
 101                         $wgOut->addWikiMsg( 'blockipsuccesstext',  $this->target );
 102                 }
 103         }
 104
 105         /**
 106          * Get the HTMLForm descriptor array for the block form
 107          * @return Array
 108          */
 109         protected static function getFormFields(){
 110                 global $wgUser, $wgBlockAllowsUTEdit;
 111
 112                 $a = array(
 113                         'Target' => array(
 114                                 'type' => 'text',
 115                                 'label-message' => 'ipadressorusername',
 116                                 'tabindex' => '1',
 117                                 'id' => 'mw-bi-target',
 118                                 'size' => '45',
 119                                 'required' => true,
 120                                 'validation-callback' => array( __CLASS__, 'validateTargetField' ),
 121                         ),
 122                         'Expiry' => array(
 123                                 'type' => !count( self::getSuggestedDurations() ) ? 'text' : 'selectorother',
 124                                 'label-message' => 'ipbexpiry',
 125                                 'required' => true,
 126                                 'tabindex' => '2',
 127                                 'options' => self::getSuggestedDurations(),
 128                                 'other' => wfMsg( 'ipbother' ),
 129                         ),
 130                         'Reason' => array(
 131                                 'type' => 'selectandother',
 132                                 'label-message' => 'ipbreason',
 133                                 'options-message' => 'ipbreason-dropdown',
 134                         ),
 135                         'CreateAccount' => array(
 136                                 'type' => 'check',
 137                                 'label-message' => 'ipbcreateaccount',
 138                                 'default' => true,
 139                         ),
 140                 );
 141
 142                 if( self::canBlockEmail( $wgUser ) ) {
 143                         $a['DisableEmail'] = array(
 144                                 'type' => 'check',
 145                                 'label-message' => 'ipbemailban',
 146                         );
 147                 }
 148
 149                 if( $wgBlockAllowsUTEdit ){
 150                         $a['DisableUTEdit'] = array(
 151                                 'type' => 'check',
 152                                 'label-message' => 'ipb-disableusertalk',
 153                                 'default' => false,
 154                         );
 155                 }
 156
 157                 $a['AutoBlock'] = array(
 158                         'type' => 'check',
 159                         'label-message' => 'ipbenableautoblock',
 160                         'default' => true,
 161                 );
 162
 163                 # Allow some users to hide name from block log, blocklist and listusers
 164                 if( $wgUser->isAllowed( 'hideuser' ) ) {
 165                         $a['HideUser'] = array(
 166                                 'type' => 'check',
 167                                 'label-message' => 'ipbhidename',
 168                                 'cssclass' => 'mw-block-hideuser',
 169                         );
 170                 }
 171
 172                 # Watchlist their user page? (Only if user is logged in)
 173                 if( $wgUser->isLoggedIn() ) {
 174                         $a['Watch'] = array(
 175                                 'type' => 'check',
 176                                 'label-message' => 'ipbwatchuser',
 177                         );
 178                 }
 179
 180                 $a['HardBlock'] = array(
 181                         'type' => 'check',
 182                         'label-message' => 'ipb-hardblock',
 183                         'default' => false,
 184                 );
 185
 186                 $a['AlreadyBlocked'] = array(
 187                         'type' => 'hidden',
 188                         'default' => false,
 189                 );
 190
 191                 return $a;
 192         }
 193
 194         /**
 195          * If the user has already been blocked with similar settings, load that block
 196          * and change the defaults for the form fields to match the existing settings.
 197          * @param &$fields Array HTMLForm descriptor array
 198          * @return Bool whether fields were altered (that is, whether the target is
 199          *     already blocked)
 200          */
 201         protected function maybeAlterFormDefaults( &$fields ){
 202                 $fields['Target']['default'] = (string)$this->target;
 203
 204                 $block = Block::newFromTargetAndType( $this->target, $this->type );
 205
 206                 if( $block instanceof Block && !$block->mAuto # The block exists and isn't an autoblock
 207                         && ( $this->type != Block::TYPE_RANGE # The block isn't a rangeblock
 208                           || $block->mAddress == $this->target ) # or if it is, the range is what we're about to block
 209                         )
 210                 {
 211                         $fields['HardBlock']['default'] = $block->isHardblock();
 212                         $fields['CreateAccount']['default'] = $block->prevents( 'createaccount' );
 213                         $fields['AutoBlock']['default'] = $block->mEnableAutoblock;
 214                         if( isset( $fields['DisableEmail'] ) ){
 215                                 $fields['DisableEmail']['default'] = $block->prevents( 'sendemail' );
 216                         }
 217                         if( isset( $fields['HideUser'] ) ){
 218                                 $fields['HideUser']['default'] = $block->mHideName;
 219                         }
 220                         if( isset( $fields['DisableUTEdit'] ) ){
 221                                 $fields['DisableUTEdit']['default'] = $block->prevents( 'editownusertalk' );
 222                         }
 223                         $fields['Reason']['default'] = $block->mReason;
 224                         $fields['AlreadyBlocked']['default'] = true;
 225
 226                         if( $block->mExpiry == 'infinity' ) {
 227                                 $fields['Expiry']['default'] = 'indefinite';
 228                         } else {
 229                                 $fields['Expiry']['default'] = wfTimestamp( TS_RFC2822, $block->mExpiry );
 230                         }
 231
 232                         return true;
 233                 }
 234                 return false;
 235         }
 236
 237         /**
 238          * Add header elements like block log entries, etc.
 239          * @param  $form HTMLForm
 240          * @return void
 241          */
 242         protected function doPreText( HTMLForm &$form ){
 243                 $form->addPreText( wfMsgExt( 'blockiptext', 'parse' ) );
 244
 245                 $otherBlockMessages = array();
 246                 if( $this->target !== null ) {
 247                         # Get other blocks, i.e. from GlobalBlocking or TorBlock extension
 248                         wfRunHooks( 'OtherBlockLogLink', array( &$otherBlockMessages, $this->target ) );
 249
 250                         if( count( $otherBlockMessages ) ) {
 251                                 $s = Html::rawElement(
 252                                         'h2',
 253                                         array(),
 254                                         wfMsgExt( 'ipb-otherblocks-header', 'parseinline', count( $otherBlockMessages ) )
 255                                 ) . "\n";
 256                                 $list = '';
 257                                 foreach( $otherBlockMessages as $link ) {
 258                                         $list .= Html::rawElement( 'li', array(), $link ) . "\n";
 259                                 }
 260                                 $s .= Html::rawElement(
 261                                         'ul',
 262                                         array( 'class' => 'mw-blockip-alreadyblocked' ),
 263                                         $list
 264                                 ) . "\n";
 265                                 $form->addPreText( $s );
 266                         }
 267                 }
 268
 269                 # Username/IP is blocked already locally
 270                 if( $this->alreadyBlocked ) {
 271                         $form->addPreText( Html::rawElement(
 272                                 'div',
 273                                 array( 'class' => 'mw-ipb-needreblock', ),
 274                                 wfMsgExt(
 275                                         'ipb-needreblock',
 276                                         array( 'parseinline' ),
 277                                         $this->target
 278                         ) ) );
 279                 }
 280         }
 281
 282         /**
 283          * Add footer elements to the form
 284          * @param  $form HTMLForm
 285          * @return void
 286          */
 287         protected function doPostText( HTMLForm &$form ){
 288                 global $wgUser, $wgLang;
 289
 290                 $skin = $wgUser->getSkin();
 291
 292                 # Link to the user's contributions, if applicable
 293                 if( $this->target instanceof User ){
 294                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $this->target->getName() );
 295                         $links[] = $skin->link(
 296                                 $contribsPage,
 297                                 wfMsgExt( 'ipb-blocklist-contribs', 'escape', $this->target->getName() )
 298                         );
 299                 }
 300
 301                 # Link to unblock the specified user, or to a blank unblock form
 302                 if( $this->target instanceof User ) {
 303                         $message = wfMsgExt( 'ipb-unblock-addr', array( 'parseinline' ), $this->target->getName() );
 304                         $list = SpecialPage::getTitleFor( 'Unblock', $this->target->getName() );
 305                 } else {
 306                         $message = wfMsgExt( 'ipb-unblock', array( 'parseinline' ) );
 307                         $list = SpecialPage::getTitleFor( 'Unblock' );
 308                 }
 309                 $links[] = $skin->linkKnown( $list, $message, array() );
 310
 311                 # Link to the block list
 312                 $links[] = $skin->linkKnown(
 313                         SpecialPage::getTitleFor( 'BlockList' ),
 314                         wfMsg( 'ipb-blocklist' )
 315                 );
 316
 317                 # Link to edit the block dropdown reasons, if applicable
 318                 if ( $wgUser->isAllowed( 'editinterface' ) ) {
 319                         $links[] = $skin->link(
 320                                 Title::makeTitle( NS_MEDIAWIKI, 'Ipbreason-dropdown' ),
 321                                 wfMsgHtml( 'ipb-edit-dropdown' ),
 322                                 array(),
 323                                 array( 'action' => 'edit' )
 324                         );
 325                 }
 326
 327                 $form->addPostText( Html::rawElement(
 328                         'p',
 329                         array( 'class' => 'mw-ipb-conveniencelinks' ),
 330                         $wgLang->pipeList( $links )
 331                 ) );
 332
 333                 if( $this->target instanceof User ){
 334                         # Get relevant extracts from the block and suppression logs, if possible
 335                         $userpage = $this->target->getUserPage();
 336                         $out = '';
 337
 338                         LogEventsList::showLogExtract(
 339                                 $out,
 340                                 'block',
 341                                 $userpage->getPrefixedText(),
 342                                 '',
 343                                 array(
 344                                         'lim' => 10,
 345                                         'msgKey' => array( 'blocklog-showlog', $userpage->getText() ),
 346                                         'showIfEmpty' => false
 347                                 )
 348                         );
 349                         $form->addPostText( $out );
 350
 351                         # Add suppression block entries if allowed
 352                         if( $wgUser->isAllowed( 'suppressionlog' ) ) {
 353                                 LogEventsList::showLogExtract(
 354                                         $out,
 355                                         'suppress',
 356                                         $userpage->getPrefixedText(),
 357                                         '',
 358                                         array(
 359                                                 'lim' => 10,
 360                                                 'conds' => array( 'log_action' => array( 'block', 'reblock', 'unblock' ) ),
 361                                                 'msgKey' => array( 'blocklog-showsuppresslog', $userpage->getText() ),
 362                                                 'showIfEmpty' => false
 363                                         )
 364                                 );
 365                                 $form->addPostText( $out );
 366                         }
 367                 }
 368         }
 369
 370         /**
 371          * Determine the target of the block, and the type of target
 372          * TODO: should be in Block.php?
 373          * @param $par String subpage parameter passed to setup, or data value from
 374          *     the HTMLForm
 375          * @param $request WebRequest optionally try and get data from a request too
 376          * @return void
 377          */
 378         public static function getTargetAndType( $par, WebRequest $request = null ){
 379                 $i = 0;
 380                 $target = null;
 381                 while( true ){
 382                         switch( $i++ ){
 383                                 case 0:
 384                                         # The HTMLForm will check wpTarget first and only if it doesn't get
 385                                         # a value use the default, which will be generated from the options
 386                                         # below; so this has to have a higher precedence here than $par, or
 387                                         # we could end up with different values in $this->target and the HTMLForm!
 388                                         if( $request instanceof WebRequest ){
 389                                                 $target = $request->getText( 'wpTarget', null );
 390                                         }
 391                                         break;
 392                                 case 1:
 393                                         $target = $par;
 394                                         break;
 395                                 case 2:
 396                                         if( $request instanceof WebRequest ){
 397                                                 $target = $request->getText( 'ip', null );
 398                                         }
 399                                         break;
 400                                 case 3:
 401                                         # B/C @since 1.18
 402                                         if( $request instanceof WebRequest ){
 403                                                 $target = $request->getText( 'wpBlockAddress', null );
 404                                         }
 405                                         break;
 406                                 case 4:
 407                                         break 2;
 408                         }
 409                         list( $target, $type ) = Block::parseTarget( $target );
 410                         if( $type !== null ){
 411                                 return array( $target, $type );
 412                         }
 413                 }
 414                 return array( null, null );
 415         }
 416
 417         /**
 418          * HTMLForm field validation-callback for Target field.
 419          * @since 1.18
 420          * @return Message
 421          */
 422         public static function validateTargetField( $value, $alldata = null ) {
 423                 global $wgBlockCIDRLimit;
 424
 425                 list( $target, $type ) = self::getTargetAndType( $value );
 426
 427                 if( $type == Block::TYPE_USER ){
 428                         # TODO: why do we not have a User->exists() method?
 429                         if( !$target->getId() ){
 430                                 return wfMessage( 'nosuchusershort', $target->getName() );
 431                         }
 432
 433                         $status = self::checkUnblockSelf( $target );
 434                         if ( $status !== true ) {
 435                                 return wfMessage( 'badaccess', $status );
 436                         }
 437
 438                 } elseif( $type == Block::TYPE_RANGE ){
 439                         list( $ip, $range ) = explode( '/', $target, 2 );
 440
 441                         if( ( IP::isIPv4( $ip ) && $wgBlockCIDRLimit['IPv4'] == 32 )
 442                                 || ( IP::isIPv6( $ip ) && $wgBlockCIDRLimit['IPV6'] == 128 ) )
 443                         {
 444                                 # Range block effectively disabled
 445                                 return wfMessage( 'range_block_disabled' );
 446                         }
 447
 448                         if( ( IP::isIPv4( $ip ) && $range > 32 )
 449                                 || ( IP::isIPv6( $ip ) && $range > 128 ) )
 450                         {
 451                                 # Dodgy range
 452                                 return wfMessage( 'ip_range_invalid' );
 453                         }
 454
 455                         if( IP::isIPv4( $ip ) && $range < $wgBlockCIDRLimit['IPv4'] ) {
 456                                 return wfMessage( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv4'] );
 457                         }
 458
 459                         if( IP::isIPv6( $ip ) && $range < $wgBlockCIDRLimit['IPv6'] ) {
 460                                 return wfMessage( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv6'] );
 461                         }
 462
 463                 } elseif( $type == Block::TYPE_IP ){
 464                         # All is well
 465
 466                 } else {
 467                         return wfMessage( 'badipaddress' );
 468                 }
 469
 470                 return true;
 471         }
 472
 473         /**
 474          * Given the form data, actually implement a block
 475          * @param  $data Array
 476          * @return Bool|String
 477          */
 478         public static function processForm( array $data ){
 479                 global $wgUser, $wgBlockAllowsUTEdit;
 480
 481                 // Handled by field validator callback
 482                 // self::validateTargetField( $data['Target'] );
 483
 484                 list( $target, $type ) = self::getTargetAndType( $data['Target'] );
 485                 if( $type == Block::TYPE_USER ){
 486                         $user = $target;
 487                         $target = $user->getName();
 488                         $userId = $user->getId();
 489                 } elseif( $type == Block::TYPE_RANGE ){
 490                         $userId = 0;
 491                 } elseif( $type == Block::TYPE_IP ){
 492                         $target = $target->getName();
 493                         $userId = 0;
 494                 } else {
 495                         # This should have been caught in the form field validation
 496                         return array( 'badipaddress' );
 497                 }
 498
 499                 if( ( strlen( $data['Expiry'] ) == 0) || ( strlen( $data['Expiry'] ) > 50 )
 500                         || !self::parseExpiryInput( $data['Expiry'] ) )
 501                 {
 502                         return array( 'ipb_expiry_invalid' );
 503                 }
 504
 505                 # If the user has done the form 'properly', they won't even have been given the
 506                 # option to suppress-block unless they have the 'hideuser' permission
 507                 if( !isset( $data['HideUser'] ) ){
 508                         $data['HideUser'] = false;
 509                 }
 510                 if( $data['HideUser'] ) {
 511                         if( !$wgUser->isAllowed('hideuser') ){
 512                                 # this codepath is unreachable except by a malicious user spoofing forms,
 513                                 # or by race conditions (user has oversight and sysop, loads block form,
 514                                 # and is de-oversighted before submission); so need to fail completely
 515                                 # rather than just silently disable hiding
 516                                 return array( 'badaccess-group0' );
 517                         }
 518
 519                         # Recheck params here...
 520                         if( $type != Block::TYPE_USER ) {
 521                                 $data['HideUser'] = false; # IP users should not be hidden
 522
 523                         } elseif( !in_array( $data['Expiry'], array( 'infinite', 'infinity', 'indefinite' ) ) ) {
 524                                 # Bad expiry.
 525                                 return array( 'ipb_expiry_temp' );
 526
 527                         } elseif( $user->getEditCount() > self::HIDEUSER_CONTRIBLIMIT ) {
 528                                 # Typically, the user should have a handful of edits.
 529                                 # Disallow hiding users with many edits for performance.
 530                                 return array( 'ipb_hide_invalid' );
 531                         }
 532                 }
 533
 534                 # Create block object.  Note that for a user block, ipb_address is only for display purposes
 535                 # FIXME: Why do we need to pass fourteen optional parameters to do this!?!
 536                 $block = new Block(
 537                         $target,                                    # IP address or User name
 538                         $userId,                                    # User id
 539                         $wgUser->getId(),                           # Blocker id
 540                         $data['Reason'][0],                         # Reason string
 541                         wfTimestampNow(),                           # Block Timestamp
 542                         0,                                          # Is this an autoblock (no)
 543                         self::parseExpiryInput( $data['Expiry'] ), # Expiry time
 544                         !$data['HardBlock'],                        # Block anon only
 545                         $data['CreateAccount'],
 546                         $data['AutoBlock'],
 547                         $data['HideUser']
 548                 );
 549
 550                 $block->prevents( 'editownusertalk', ( !$wgBlockAllowsUTEdit || $data['DisableUTEdit'] ) );
 551                 $block->prevents( 'sendemail', $data['DisableEmail'] );
 552
 553                 if( !wfRunHooks( 'BlockIp', array( &$block, &$wgUser ) ) ) {
 554                         return array( 'hookaborted' );
 555                 }
 556
 557                 # Try to insert block. Is there a conflicting block?
 558                 if( !$block->insert() ) {
 559
 560                         # Show form unless the user is already aware of this...
 561                         if( !$data['AlreadyBlocked'] ) {
 562                                 return array( array( 'ipb_already_blocked', $data['Target'] ) );
 563
 564                         # Otherwise, try to update the block...
 565                         } else {
 566
 567                                 # This returns direct blocks before autoblocks/rangeblocks, since we should
 568                                 # be sure the user is blocked by now it should work for our purposes
 569                                 $currentBlock = Block::newFromTargetAndType( $target, $type );
 570
 571                                 if( $block->equals( $currentBlock ) ) {
 572                                         return array( 'ipb_already_blocked' );
 573                                 }
 574
 575                                 # If the name was hidden and the blocking user cannot hide
 576                                 # names, then don't allow any block changes...
 577                                 if( $currentBlock->mHideName && !$wgUser->isAllowed( 'hideuser' ) ) {
 578                                         return array( 'cant-see-hidden-user' );
 579                                 }
 580
 581                                 $currentBlock->delete();
 582                                 $block->insert();
 583                                 $logaction = 'reblock';
 584
 585                                 # Unset _deleted fields if requested
 586                                 if( $currentBlock->mHideName && !$data['HideUser'] ) {
 587                                         RevisionDeleteUser::unsuppressUserName( $target, $userId );
 588                                 }
 589
 590                                 # If hiding/unhiding a name, this should go in the private logs
 591                                 if( (bool)$currentBlock->mHideName ){
 592                                         $data['HideUser'] = true;
 593                                 }
 594                         }
 595
 596                 } else {
 597                         $logaction = 'block';
 598                 }
 599
 600                 wfRunHooks( 'BlockIpComplete', array( $block, $wgUser ) );
 601
 602                 # Set *_deleted fields if requested
 603                 if( $data['HideUser'] ) {
 604                         RevisionDeleteUser::suppressUserName( $target, $userId );
 605                 }
 606
 607                 # Can't watch a rangeblock
 608                 if( $type != Block::TYPE_RANGE && $data['Watch'] ) {
 609                         $wgUser->addWatch( Title::makeTitle( NS_USER, $target ) );
 610                 }
 611
 612                 # Block constructor sanitizes certain block options on insert
 613                 $data['BlockEmail'] = $block->prevents( 'sendemail' );
 614                 $data['AutoBlock'] = $block->mEnableAutoblock;
 615
 616                 # Prepare log parameters
 617                 $logParams = array();
 618                 $logParams[] = $data['Expiry'];
 619                 $logParams[] = self::blockLogFlags( $data, $type );
 620
 621                 # Make log entry, if the name is hidden, put it in the oversight log
 622                 $log_type = $data['HideUser'] ? 'suppress' : 'block';
 623                 $log = new LogPage( $log_type );
 624                 $log->addEntry(
 625                         $logaction,
 626                         Title::makeTitle( NS_USER, $target ),
 627                         $data['Reason'][0],
 628                         $logParams
 629                 );
 630
 631                 # Report to the user
 632                 return true;
 633         }
 634
 635         /**
 636          * Get an array of suggested block durations from MediaWiki:Ipboptions
 637          * FIXME: this uses a rather odd syntax for the options, should it be converted
 638          *     to the standard "**<duration>|<displayname>" format?
 639          * @return Array
 640          */
 641         public static function getSuggestedDurations( $lang = null ){
 642                 $a = array();
 643                 $msg = $lang === null
 644                         ? wfMessage( 'ipboptions' )->inContentLanguage()
 645                         : wfMessage( 'ipboptions' )->inLanguage( $lang );
 646
 647                 if( $msg == '-' ){
 648                         return array();
 649                 }
 650
 651                 foreach( explode( ',', $msg ) as $option ) {
 652                         if( strpos( $option, ':' ) === false ){
 653                                 $option = "$option:$option";
 654                         }
 655                         list( $show, $value ) = explode( ':', $option );
 656                         $a[htmlspecialchars( $show )] = htmlspecialchars( $value );
 657                 }
 658                 return $a;
 659         }
 660
 661         /**
 662          * Convert a submitted expiry time, which may be relative ("2 weeks", etc) or absolute
 663          * ("24 May 2034", etc), into an absolute timestamp we can put into the database.
 664          * @param $expiry String: whatever was typed into the form
 665          * @return String: timestamp or "infinity" string for the DB implementation
 666          */
 667         public static function parseExpiryInput( $expiry ) {
 668                 static $infinity;
 669                 if( $infinity == null ){
 670                         $infinity = wfGetDB( DB_READ )->getInfinity();
 671                 }
 672                 if ( $expiry == 'infinite' || $expiry == 'indefinite' ) {
 673                         $expiry = $infinity;
 674                 } else {
 675                         $expiry = strtotime( $expiry );
 676                         if ( $expiry < 0 || $expiry === false ) {
 677                                 return false;
 678                         }
 679                         $expiry = wfTimestamp( TS_MW, $expiry );
 680                 }
 681                 return $expiry;
 682         }
 683
 684         /**
 685          * Can we do an email block?
 686          * @param $user User: the sysop wanting to make a block
 687          * @return Boolean
 688          */
 689         public static function canBlockEmail( $user ) {
 690                 global $wgEnableUserEmail, $wgSysopEmailBans;
 691                 return ( $wgEnableUserEmail && $wgSysopEmailBans && $user->isAllowed( 'blockemail' ) );
 692         }
 693
 694         /**
 695          * bug 15810: blocked admins should not be able to block/unblock
 696          * others, and probably shouldn't be able to unblock themselves
 697          * either.
 698          * @param $user User|Int|String
 699          */
 700         public static function checkUnblockSelf( $user ) {
 701                 global $wgUser;
 702                 if ( is_int( $user ) ) {
 703                         $user = User::newFromId( $user );
 704                 } elseif ( is_string( $user ) ) {
 705                         $user = User::newFromName( $user );
 706                 }
 707                 if( $wgUser->isBlocked() ){
 708                         if( $user instanceof User && $user->getId() == $wgUser->getId() ) {
 709                                 # User is trying to unblock themselves
 710                                 if ( $wgUser->isAllowed( 'unblockself' ) ) {
 711                                         return true;
 712                                 } else {
 713                                         return 'ipbnounblockself';
 714                                 }
 715                         } else {
 716                                 # User is trying to block/unblock someone else
 717                                 return 'ipbblocked';
 718                         }
 719                 } else {
 720                         return true;
 721                 }
 722         }
 723
 724         /**
 725          * Return a comma-delimited list of "flags" to be passed to the log
 726          * reader for this block, to provide more information in the logs
 727          * @param $data Array from HTMLForm data
 728          * @param $type Block::TYPE_ constant
 729          * @return array
 730          */
 731         protected static function blockLogFlags( array $data, $type ) {
 732                 global $wgBlockAllowsUTEdit;
 733                 $flags = array();
 734
 735                 # when blocking a user the option 'anononly' is not available/has no effect -> do not write this into log
 736                 if( !$data['HardBlock'] && $type != Block::TYPE_USER ){
 737                         $flags[] = 'anononly';
 738                 }
 739
 740                 if( $data['CreateAccount'] ){
 741                         $flags[] = 'nocreate';
 742                 }
 743
 744                 # Same as anononly, this is not displayed when blocking an IP address
 745                 if( !$data['AutoBlock'] && $type != Block::TYPE_IP ){
 746                         $flags[] = 'noautoblock';
 747                 }
 748
 749                 if( $data['DisableEmail'] ){
 750                         $flags[] = 'noemail';
 751                 }
 752
 753                 if( $data['DisableUTEdit'] && $wgBlockAllowsUTEdit ){
 754                         $flags[] = 'nousertalk';
 755                 }
 756
 757                 if( $data['HideUser'] ){
 758                         $flags[] = 'hiddenname';
 759                 }
 760
 761                 return implode( ',', $flags );
 762         }
 763 }
 764
 765 # BC @since 1.18
 766 class IPBlockForm extends SpecialBlock {}