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 FormSpecialPage {
  31         /** The maximum number of edits a user can have and still be hidden
  32          * TODO: config setting? */
  33         const HIDEUSER_CONTRIBLIMIT = 1000;
  34
  35         /** @var User user to be blocked, as passed either by parameter (url?wpTarget=Foo)
  36          * or as subpage (Special:Block/Foo) */
  37         protected $target;
  38
  39         /// @var Block::TYPE_ constant
  40         protected $type;
  41
  42         /// @var  User|String the previous block target
  43         protected $previousTarget;
  44
  45         /// @var Bool whether the previous submission of the form asked for HideUser
  46         protected $requestedHideUser;
  47
  48         /// @var Bool
  49         protected $alreadyBlocked;
  50
  51         /// @var Array
  52         protected $preErrors = array();
  53
  54         public function __construct() {
  55                 parent::__construct( 'Block', 'block' );
  56         }
  57
  58         /**
  59          * Checks that the user can unblock themselves if they are trying to do so
  60          *
  61          * @param User $user
  62          * @throws ErrorPageError
  63          */
  64         protected function checkExecutePermissions( User $user ) {
  65                  parent::checkExecutePermissions( $user );
  66
  67                 # bug 15810: blocked admins should have limited access here
  68                 $status = self::checkUnblockSelf( $this->target, $user );
  69                 if ( $status !== true ) {
  70                         throw new ErrorPageError( 'badaccess', $status );
  71                 }
  72         }
  73
  74         /**
  75          * Handle some magic here
  76          *
  77          * @param $par String
  78          */
  79         protected function setParameter( $par ) {
  80                 # Extract variables from the request.  Try not to get into a situation where we
  81                 # need to extract *every* variable from the form just for processing here, but
  82                 # there are legitimate uses for some variables
  83                 $request = $this->getRequest();
  84                 list( $this->target, $this->type ) = self::getTargetAndType( $par, $request );
  85                 if ( $this->target instanceof User ) {
  86                         # Set the 'relevant user' in the skin, so it displays links like Contributions,
  87                         # User logs, UserRights, etc.
  88                         $this->getSkin()->setRelevantUser( $this->target );
  89                 }
  90
  91                 list( $this->previousTarget, /*...*/ ) = Block::parseTarget( $request->getVal( 'wpPreviousTarget' ) );
  92                 $this->requestedHideUser = $request->getBool( 'wpHideUser' );
  93         }
  94
  95         /**
  96          * Customizes the HTMLForm a bit
  97          *
  98          * @param $form HTMLForm
  99          */
 100         protected function alterForm( HTMLForm $form ) {
 101                 $form->setWrapperLegendMsg( 'blockip-legend' );
 102                 $form->setHeaderText( '' );
 103                 $form->setSubmitCallback( array( __CLASS__, 'processUIForm' ) );
 104
 105                 $msg = $this->alreadyBlocked ? 'ipb-change-block' : 'ipbsubmit';
 106                 $form->setSubmitTextMsg( $msg );
 107
 108                 # Don't need to do anything if the form has been posted
 109                 if ( !$this->getRequest()->wasPosted() && $this->preErrors ) {
 110                         $s = HTMLForm::formatErrors( $this->preErrors );
 111                         if ( $s ) {
 112                                 $form->addHeaderText( Html::rawElement(
 113                                                 'div',
 114                                                 array( 'class' => 'error' ),
 115                                                 $s
 116                                         ) );
 117                         }
 118                 }
 119         }
 120
 121         /**
 122          * Get the HTMLForm descriptor array for the block form
 123          * @return Array
 124          */
 125         protected function getFormFields() {
 126                 global $wgBlockAllowsUTEdit;
 127
 128                 $user = $this->getUser();
 129
 130                 $a = array(
 131                         'Target' => array(
 132                                 'type' => 'text',
 133                                 'label-message' => 'ipadressorusername',
 134                                 'tabindex' => '1',
 135                                 'id' => 'mw-bi-target',
 136                                 'size' => '45',
 137                                 'required' => true,
 138                                 'validation-callback' => array( __CLASS__, 'validateTargetField' ),
 139                         ),
 140                         'Expiry' => array(
 141                                 'type' => !count( self::getSuggestedDurations() ) ? 'text' : 'selectorother',
 142                                 'label-message' => 'ipbexpiry',
 143                                 'required' => true,
 144                                 'tabindex' => '2',
 145                                 'options' => self::getSuggestedDurations(),
 146                                 'other' => $this->msg( 'ipbother' )->text(),
 147                                 'default' => $this->msg( 'ipb-default-expiry' )->inContentLanguage()->text(),
 148                         ),
 149                         'Reason' => array(
 150                                 'type' => 'selectandother',
 151                                 'label-message' => 'ipbreason',
 152                                 'options-message' => 'ipbreason-dropdown',
 153                         ),
 154                         'CreateAccount' => array(
 155                                 'type' => 'check',
 156                                 'label-message' => 'ipbcreateaccount',
 157                                 'default' => true,
 158                         ),
 159                 );
 160
 161                 if ( self::canBlockEmail( $user ) ) {
 162                         $a['DisableEmail'] = array(
 163                                 'type' => 'check',
 164                                 'label-message' => 'ipbemailban',
 165                         );
 166                 }
 167
 168                 if ( $wgBlockAllowsUTEdit ) {
 169                         $a['DisableUTEdit'] = array(
 170                                 'type' => 'check',
 171                                 'label-message' => 'ipb-disableusertalk',
 172                                 'default' => false,
 173                         );
 174                 }
 175
 176                 $a['AutoBlock'] = array(
 177                         'type' => 'check',
 178                         'label-message' => 'ipbenableautoblock',
 179                         'default' => true,
 180                 );
 181
 182                 # Allow some users to hide name from block log, blocklist and listusers
 183                 if ( $user->isAllowed( 'hideuser' ) ) {
 184                         $a['HideUser'] = array(
 185                                 'type' => 'check',
 186                                 'label-message' => 'ipbhidename',
 187                                 'cssclass' => 'mw-block-hideuser',
 188                         );
 189                 }
 190
 191                 # Watchlist their user page? (Only if user is logged in)
 192                 if ( $user->isLoggedIn() ) {
 193                         $a['Watch'] = array(
 194                                 'type' => 'check',
 195                                 'label-message' => 'ipbwatchuser',
 196                         );
 197                 }
 198
 199                 $a['HardBlock'] = array(
 200                         'type' => 'check',
 201                         'label-message' => 'ipb-hardblock',
 202                         'default' => false,
 203                 );
 204
 205                 # This is basically a copy of the Target field, but the user can't change it, so we
 206                 # can see if the warnings we maybe showed to the user before still apply
 207                 $a['PreviousTarget'] = array(
 208                         'type' => 'hidden',
 209                         'default' => false,
 210                 );
 211
 212                 # We'll turn this into a checkbox if we need to
 213                 $a['Confirm'] = array(
 214                         'type' => 'hidden',
 215                         'default' => '',
 216                         'label-message' => 'ipb-confirm',
 217                 );
 218
 219                 $this->maybeAlterFormDefaults( $a );
 220
 221                 return $a;
 222         }
 223
 224         /**
 225          * If the user has already been blocked with similar settings, load that block
 226          * and change the defaults for the form fields to match the existing settings.
 227          * @param $fields Array HTMLForm descriptor array
 228          * @return Bool whether fields were altered (that is, whether the target is
 229          *     already blocked)
 230          */
 231         protected function maybeAlterFormDefaults( &$fields ) {
 232                 # This will be overwritten by request data
 233                 $fields['Target']['default'] = (string)$this->target;
 234
 235                 # This won't be
 236                 $fields['PreviousTarget']['default'] = (string)$this->target;
 237
 238                 $block = Block::newFromTarget( $this->target );
 239
 240                 if ( $block instanceof Block && !$block->mAuto # The block exists and isn't an autoblock
 241                         && ( $this->type != Block::TYPE_RANGE # The block isn't a rangeblock
 242                           || $block->getTarget() == $this->target ) # or if it is, the range is what we're about to block
 243                         )
 244                 {
 245                         $fields['HardBlock']['default'] = $block->isHardblock();
 246                         $fields['CreateAccount']['default'] = $block->prevents( 'createaccount' );
 247                         $fields['AutoBlock']['default'] = $block->isAutoblocking();
 248
 249                         if ( isset( $fields['DisableEmail'] ) ) {
 250                                 $fields['DisableEmail']['default'] = $block->prevents( 'sendemail' );
 251                         }
 252
 253                         if ( isset( $fields['HideUser'] ) ) {
 254                                 $fields['HideUser']['default'] = $block->mHideName;
 255                         }
 256
 257                         if ( isset( $fields['DisableUTEdit'] ) ) {
 258                                 $fields['DisableUTEdit']['default'] = $block->prevents( 'editownusertalk' );
 259                         }
 260
 261                         // If the username was hidden (ipb_deleted == 1), don't show the reason
 262                         // unless this user also has rights to hideuser: Bug 35839
 263                         if ( !$block->mHideName || $this->getUser()->isAllowed( 'hideuser' ) ) {
 264                                 $fields['Reason']['default'] = $block->mReason;
 265                         } else {
 266                                 $fields['Reason']['default'] = '';
 267                         }
 268
 269                         if ( $this->getRequest()->wasPosted() ) {
 270                                 # Ok, so we got a POST submission asking us to reblock a user.  So show the
 271                                 # confirm checkbox; the user will only see it if they haven't previously
 272                                 $fields['Confirm']['type'] = 'check';
 273                         } else {
 274                                 # We got a target, but it wasn't a POST request, so the user must have gone
 275                                 # to a link like [[Special:Block/User]].  We don't need to show the checkbox
 276                                 # as long as they go ahead and block *that* user
 277                                 $fields['Confirm']['default'] = 1;
 278                         }
 279
 280                         if ( $block->mExpiry == 'infinity' ) {
 281                                 $fields['Expiry']['default'] = 'infinite';
 282                         } else {
 283                                 $fields['Expiry']['default'] = wfTimestamp( TS_RFC2822, $block->mExpiry );
 284                         }
 285
 286                         $this->alreadyBlocked = true;
 287                         $this->preErrors[] = array( 'ipb-needreblock', wfEscapeWikiText( (string)$block->getTarget() ) );
 288                 }
 289
 290                 # We always need confirmation to do HideUser
 291                 if ( $this->requestedHideUser ) {
 292                         $fields['Confirm']['type'] = 'check';
 293                         unset( $fields['Confirm']['default'] );
 294                         $this->preErrors[] = 'ipb-confirmhideuser';
 295                 }
 296
 297                 # Or if the user is trying to block themselves
 298                 if ( (string)$this->target === $this->getUser()->getName() ) {
 299                         $fields['Confirm']['type'] = 'check';
 300                         unset( $fields['Confirm']['default'] );
 301                         $this->preErrors[] = 'ipb-blockingself';
 302                 }
 303         }
 304
 305         /**
 306          * Add header elements like block log entries, etc.
 307          * @return String
 308          */
 309         protected function preText() {
 310                 $this->getOutput()->addModules( 'mediawiki.special.block' );
 311
 312                 $text = $this->msg( 'blockiptext' )->parse();
 313
 314                 $otherBlockMessages = array();
 315                 if ( $this->target !== null ) {
 316                         # Get other blocks, i.e. from GlobalBlocking or TorBlock extension
 317                         wfRunHooks( 'OtherBlockLogLink', array( &$otherBlockMessages, $this->target ) );
 318
 319                         if ( count( $otherBlockMessages ) ) {
 320                                 $s = Html::rawElement(
 321                                         'h2',
 322                                         array(),
 323                                         $this->msg( 'ipb-otherblocks-header', count( $otherBlockMessages ) )->parse()
 324                                 ) . "\n";
 325
 326                                 $list = '';
 327
 328                                 foreach ( $otherBlockMessages as $link ) {
 329                                         $list .= Html::rawElement( 'li', array(), $link ) . "\n";
 330                                 }
 331
 332                                 $s .= Html::rawElement(
 333                                         'ul',
 334                                         array( 'class' => 'mw-blockip-alreadyblocked' ),
 335                                         $list
 336                                 ) . "\n";
 337
 338                                 $text .= $s;
 339                         }
 340                 }
 341
 342                 return $text;
 343         }
 344
 345         /**
 346          * Add footer elements to the form
 347          * @return string
 348          */
 349         protected function postText() {
 350                 $links = array();
 351
 352                 # Link to the user's contributions, if applicable
 353                 if ( $this->target instanceof User ) {
 354                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $this->target->getName() );
 355                         $links[] = Linker::link(
 356                                 $contribsPage,
 357                                 $this->msg( 'ipb-blocklist-contribs', $this->target->getName() )->escaped()
 358                         );
 359                 }
 360
 361                 # Link to unblock the specified user, or to a blank unblock form
 362                 if ( $this->target instanceof User ) {
 363                         $message = $this->msg( 'ipb-unblock-addr', wfEscapeWikiText( $this->target->getName() ) )->parse();
 364                         $list = SpecialPage::getTitleFor( 'Unblock', $this->target->getName() );
 365                 } else {
 366                         $message = $this->msg( 'ipb-unblock' )->parse();
 367                         $list = SpecialPage::getTitleFor( 'Unblock' );
 368                 }
 369                 $links[] = Linker::linkKnown( $list, $message, array() );
 370
 371                 # Link to the block list
 372                 $links[] = Linker::linkKnown(
 373                         SpecialPage::getTitleFor( 'BlockList' ),
 374                         $this->msg( 'ipb-blocklist' )->escaped()
 375                 );
 376
 377                 $user = $this->getUser();
 378
 379                 # Link to edit the block dropdown reasons, if applicable
 380                 if ( $user->isAllowed( 'editinterface' ) ) {
 381                         $links[] = Linker::link(
 382                                 Title::makeTitle( NS_MEDIAWIKI, 'Ipbreason-dropdown' ),
 383                                 $this->msg( 'ipb-edit-dropdown' )->escaped(),
 384                                 array(),
 385                                 array( 'action' => 'edit' )
 386                         );
 387                 }
 388
 389                 $text =  Html::rawElement(
 390                         'p',
 391                         array( 'class' => 'mw-ipb-conveniencelinks' ),
 392                         $this->getLanguage()->pipeList( $links )
 393                 );
 394
 395                 $userTitle = self::getTargetUserTitle( $this->target );
 396                 if ( $userTitle ) {
 397                         # Get relevant extracts from the block and suppression logs, if possible
 398                         $out = '';
 399
 400                         LogEventsList::showLogExtract(
 401                                 $out,
 402                                 'block',
 403                                 $userTitle,
 404                                 '',
 405                                 array(
 406                                         'lim' => 10,
 407                                         'msgKey' => array( 'blocklog-showlog', $userTitle->getText() ),
 408                                         'showIfEmpty' => false
 409                                 )
 410                         );
 411                         $text .= $out;
 412
 413                         # Add suppression block entries if allowed
 414                         if ( $user->isAllowed( 'suppressionlog' ) ) {
 415                                 LogEventsList::showLogExtract(
 416                                         $out,
 417                                         'suppress',
 418                                         $userTitle,
 419                                         '',
 420                                         array(
 421                                                 'lim' => 10,
 422                                                 'conds' => array( 'log_action' => array( 'block', 'reblock', 'unblock' ) ),
 423                                                 'msgKey' => array( 'blocklog-showsuppresslog', $userTitle->getText() ),
 424                                                 'showIfEmpty' => false
 425                                         )
 426                                 );
 427
 428                                 $text .= $out;
 429                         }
 430                 }
 431
 432                 return $text;
 433         }
 434
 435         /**
 436          * Get a user page target for things like logs.
 437          * This handles account and IP range targets.
 438          * @param $target User|string
 439          * @return Title|null
 440          */
 441         protected static function getTargetUserTitle( $target ) {
 442                 if ( $target instanceof User ) {
 443                         return $target->getUserPage();
 444                 } elseif ( IP::isIPAddress( $target ) ) {
 445                         return Title::makeTitleSafe( NS_USER, $target );
 446                 }
 447                 return null;
 448         }
 449
 450         /**
 451          * Determine the target of the block, and the type of target
 452          * TODO: should be in Block.php?
 453          * @param $par String subpage parameter passed to setup, or data value from
 454          *     the HTMLForm
 455          * @param $request WebRequest optionally try and get data from a request too
 456          * @return array( User|string|null, Block::TYPE_ constant|null )
 457          */
 458         public static function getTargetAndType( $par, WebRequest $request = null ) {
 459                 $i = 0;
 460                 $target = null;
 461
 462                 while( true ) {
 463                         switch( $i++ ) {
 464                                 case 0:
 465                                         # The HTMLForm will check wpTarget first and only if it doesn't get
 466                                         # a value use the default, which will be generated from the options
 467                                         # below; so this has to have a higher precedence here than $par, or
 468                                         # we could end up with different values in $this->target and the HTMLForm!
 469                                         if ( $request instanceof WebRequest ) {
 470                                                 $target = $request->getText( 'wpTarget', null );
 471                                         }
 472                                         break;
 473                                 case 1:
 474                                         $target = $par;
 475                                         break;
 476                                 case 2:
 477                                         if ( $request instanceof WebRequest ) {
 478                                                 $target = $request->getText( 'ip', null );
 479                                         }
 480                                         break;
 481                                 case 3:
 482                                         # B/C @since 1.18
 483                                         if ( $request instanceof WebRequest ) {
 484                                                 $target = $request->getText( 'wpBlockAddress', null );
 485                                         }
 486                                         break;
 487                                 case 4:
 488                                         break 2;
 489                         }
 490
 491                         list( $target, $type ) = Block::parseTarget( $target );
 492
 493                         if ( $type !== null ) {
 494                                 return array( $target, $type );
 495                         }
 496                 }
 497
 498                 return array( null, null );
 499         }
 500
 501         /**
 502          * HTMLForm field validation-callback for Target field.
 503          * @since 1.18
 504          * @param $value String
 505          * @param $alldata Array
 506          * @param $form HTMLForm
 507          * @return Message
 508          */
 509         public static function validateTargetField( $value, $alldata, $form ) {
 510                 global $wgBlockCIDRLimit;
 511
 512                 list( $target, $type ) = self::getTargetAndType( $value );
 513
 514                 if ( $type == Block::TYPE_USER ) {
 515                         # TODO: why do we not have a User->exists() method?
 516                         if ( !$target->getId() ) {
 517                                 return $form->msg( 'nosuchusershort',
 518                                         wfEscapeWikiText( $target->getName() ) );
 519                         }
 520
 521                         $status = self::checkUnblockSelf( $target, $form->getUser() );
 522                         if ( $status !== true ) {
 523                                 return $form->msg( 'badaccess', $status );
 524                         }
 525
 526                 } elseif ( $type == Block::TYPE_RANGE ) {
 527                         list( $ip, $range ) = explode( '/', $target, 2 );
 528
 529                         if ( ( IP::isIPv4( $ip ) && $wgBlockCIDRLimit['IPv4'] == 32 )
 530                                 || ( IP::isIPv6( $ip ) && $wgBlockCIDRLimit['IPv6'] == 128 ) )
 531                         {
 532                                 # Range block effectively disabled
 533                                 return $form->msg( 'range_block_disabled' );
 534                         }
 535
 536                         if ( ( IP::isIPv4( $ip ) && $range > 32 )
 537                                 || ( IP::isIPv6( $ip ) && $range > 128 ) )
 538                         {
 539                                 # Dodgy range
 540                                 return $form->msg( 'ip_range_invalid' );
 541                         }
 542
 543                         if ( IP::isIPv4( $ip ) && $range < $wgBlockCIDRLimit['IPv4'] ) {
 544                                 return $form->msg( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv4'] );
 545                         }
 546
 547                         if ( IP::isIPv6( $ip ) && $range < $wgBlockCIDRLimit['IPv6'] ) {
 548                                 return $form->msg( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv6'] );
 549                         }
 550                 } elseif ( $type == Block::TYPE_IP ) {
 551                         # All is well
 552                 } else {
 553                         return $form->msg( 'badipaddress' );
 554                 }
 555
 556                 return true;
 557         }
 558
 559         /**
 560          * Submit callback for an HTMLForm object, will simply pass
 561          * @param $data array
 562          * @param $form HTMLForm
 563          * @return Bool|String
 564          */
 565         public static function processUIForm( array $data, HTMLForm $form ) {
 566                 return self::processForm( $data, $form->getContext() );
 567         }
 568
 569         /**
 570          * Given the form data, actually implement a block
 571          * @param  $data Array
 572          * @param  $context IContextSource
 573          * @return Bool|String
 574          */
 575         public static function processForm( array $data, IContextSource $context ) {
 576                 global $wgBlockAllowsUTEdit;
 577
 578                 $performer = $context->getUser();
 579
 580                 // Handled by field validator callback
 581                 // self::validateTargetField( $data['Target'] );
 582
 583                 # This might have been a hidden field or a checkbox, so interesting data
 584                 # can come from it
 585                 $data['Confirm'] = !in_array( $data['Confirm'], array( '', '0', null, false ), true );
 586
 587                 list( $target, $type ) = self::getTargetAndType( $data['Target'] );
 588                 if ( $type == Block::TYPE_USER ) {
 589                         $user = $target;
 590                         $target = $user->getName();
 591                         $userId = $user->getId();
 592
 593                         # Give admins a heads-up before they go and block themselves.  Much messier
 594                         # to do this for IPs, but it's pretty unlikely they'd ever get the 'block'
 595                         # permission anyway, although the code does allow for it.
 596                         # Note: Important to use $target instead of $data['Target']
 597                         # since both $data['PreviousTarget'] and $target are normalized
 598                         # but $data['target'] gets overriden by (non-normalized) request variable
 599                         # from previous request.
 600                         if ( $target === $performer->getName() &&
 601                                 ( $data['PreviousTarget'] !== $target || !$data['Confirm'] ) )
 602                         {
 603                                 return array( 'ipb-blockingself' );
 604                         }
 605                 } elseif ( $type == Block::TYPE_RANGE ) {
 606                         $userId = 0;
 607                 } elseif ( $type == Block::TYPE_IP ) {
 608                         $target = $target->getName();
 609                         $userId = 0;
 610                 } else {
 611                         # This should have been caught in the form field validation
 612                         return array( 'badipaddress' );
 613                 }
 614
 615                 if ( ( strlen( $data['Expiry'] ) == 0) || ( strlen( $data['Expiry'] ) > 50 )
 616                         || !self::parseExpiryInput( $data['Expiry'] ) )
 617                 {
 618                         return array( 'ipb_expiry_invalid' );
 619                 }
 620
 621                 if ( !isset( $data['DisableEmail'] ) ) {
 622                         $data['DisableEmail'] = false;
 623                 }
 624
 625                 # If the user has done the form 'properly', they won't even have been given the
 626                 # option to suppress-block unless they have the 'hideuser' permission
 627                 if ( !isset( $data['HideUser'] ) ) {
 628                         $data['HideUser'] = false;
 629                 }
 630
 631                 if ( $data['HideUser'] ) {
 632                         if ( !$performer->isAllowed('hideuser') ) {
 633                                 # this codepath is unreachable except by a malicious user spoofing forms,
 634                                 # or by race conditions (user has oversight and sysop, loads block form,
 635                                 # and is de-oversighted before submission); so need to fail completely
 636                                 # rather than just silently disable hiding
 637                                 return array( 'badaccess-group0' );
 638                         }
 639
 640                         # Recheck params here...
 641                         if ( $type != Block::TYPE_USER ) {
 642                                 $data['HideUser'] = false; # IP users should not be hidden
 643                         } elseif ( !in_array( $data['Expiry'], array( 'infinite', 'infinity', 'indefinite' ) ) ) {
 644                                 # Bad expiry.
 645                                 return array( 'ipb_expiry_temp' );
 646                         } elseif ( $user->getEditCount() > self::HIDEUSER_CONTRIBLIMIT ) {
 647                                 # Typically, the user should have a handful of edits.
 648                                 # Disallow hiding users with many edits for performance.
 649                                 return array( 'ipb_hide_invalid' );
 650                         } elseif ( !$data['Confirm'] ) {
 651                                 return array( 'ipb-confirmhideuser' );
 652                         }
 653                 }
 654
 655                 # Create block object.
 656                 $block = new Block();
 657                 $block->setTarget( $target );
 658                 $block->setBlocker( $performer );
 659                 $block->mReason = $data['Reason'][0];
 660                 $block->mExpiry = self::parseExpiryInput( $data['Expiry'] );
 661                 $block->prevents( 'createaccount', $data['CreateAccount'] );
 662                 $block->prevents( 'editownusertalk', ( !$wgBlockAllowsUTEdit || $data['DisableUTEdit'] ) );
 663                 $block->prevents( 'sendemail', $data['DisableEmail'] );
 664                 $block->isHardblock( $data['HardBlock'] );
 665                 $block->isAutoblocking( $data['AutoBlock'] );
 666                 $block->mHideName = $data['HideUser'];
 667
 668                 if ( !wfRunHooks( 'BlockIp', array( &$block, &$performer ) ) ) {
 669                         return array( 'hookaborted' );
 670                 }
 671
 672                 # Try to insert block. Is there a conflicting block?
 673                 $status = $block->insert();
 674                 if ( !$status ) {
 675                         # Show form unless the user is already aware of this...
 676                         if ( !$data['Confirm'] || ( array_key_exists( 'PreviousTarget', $data )
 677                                 && $data['PreviousTarget'] !== $target ) )
 678                         {
 679                                 return array( array( 'ipb_already_blocked', $block->getTarget() ) );
 680                         # Otherwise, try to update the block...
 681                         } else {
 682                                 # This returns direct blocks before autoblocks/rangeblocks, since we should
 683                                 # be sure the user is blocked by now it should work for our purposes
 684                                 $currentBlock = Block::newFromTarget( $target );
 685
 686                                 if ( $block->equals( $currentBlock ) ) {
 687                                         return array( array( 'ipb_already_blocked', $block->getTarget() ) );
 688                                 }
 689
 690                                 # If the name was hidden and the blocking user cannot hide
 691                                 # names, then don't allow any block changes...
 692                                 if ( $currentBlock->mHideName && !$performer->isAllowed( 'hideuser' ) ) {
 693                                         return array( 'cant-see-hidden-user' );
 694                                 }
 695
 696                                 $currentBlock->delete();
 697                                 $status = $block->insert();
 698                                 $logaction = 'reblock';
 699
 700                                 # Unset _deleted fields if requested
 701                                 if ( $currentBlock->mHideName && !$data['HideUser'] ) {
 702                                         RevisionDeleteUser::unsuppressUserName( $target, $userId );
 703                                 }
 704
 705                                 # If hiding/unhiding a name, this should go in the private logs
 706                                 if ( (bool)$currentBlock->mHideName ) {
 707                                         $data['HideUser'] = true;
 708                                 }
 709                         }
 710                 } else {
 711                         $logaction = 'block';
 712                 }
 713
 714                 wfRunHooks( 'BlockIpComplete', array( $block, $performer ) );
 715
 716                 # Set *_deleted fields if requested
 717                 if ( $data['HideUser'] ) {
 718                         RevisionDeleteUser::suppressUserName( $target, $userId );
 719                 }
 720
 721                 # Can't watch a rangeblock
 722                 if ( $type != Block::TYPE_RANGE && $data['Watch'] ) {
 723                         $performer->addWatch( Title::makeTitle( NS_USER, $target ) );
 724                 }
 725
 726                 # Block constructor sanitizes certain block options on insert
 727                 $data['BlockEmail'] = $block->prevents( 'sendemail' );
 728                 $data['AutoBlock'] = $block->isAutoblocking();
 729
 730                 # Prepare log parameters
 731                 $logParams = array();
 732                 $logParams[] = $data['Expiry'];
 733                 $logParams[] = self::blockLogFlags( $data, $type );
 734
 735                 # Make log entry, if the name is hidden, put it in the oversight log
 736                 $log_type = $data['HideUser'] ? 'suppress' : 'block';
 737                 $log = new LogPage( $log_type );
 738                 $log_id = $log->addEntry(
 739                         $logaction,
 740                         Title::makeTitle( NS_USER, $target ),
 741                         $data['Reason'][0],
 742                         $logParams
 743                 );
 744                 # Relate log ID to block IDs (bug 25763)
 745                 $blockIds = array_merge( array( $status['id'] ), $status['autoIds']  );
 746                 $log->addRelations( 'ipb_id', $blockIds, $log_id );
 747
 748                 # Report to the user
 749                 return true;
 750         }
 751
 752         /**
 753          * Get an array of suggested block durations from MediaWiki:Ipboptions
 754          * @todo FIXME: This uses a rather odd syntax for the options, should it be converted
 755          *     to the standard "**<duration>|<displayname>" format?
 756          * @param $lang Language|null the language to get the durations in, or null to use
 757          *     the wiki's content language
 758          * @return Array
 759          */
 760         public static function getSuggestedDurations( $lang = null ) {
 761                 $a = array();
 762                 $msg = $lang === null
 763                         ? wfMessage( 'ipboptions' )->inContentLanguage()->text()
 764                         : wfMessage( 'ipboptions' )->inLanguage( $lang )->text();
 765
 766                 if ( $msg == '-' ) {
 767                         return array();
 768                 }
 769
 770                 foreach ( explode( ',', $msg ) as $option ) {
 771                         if ( strpos( $option, ':' ) === false ) {
 772                                 $option = "$option:$option";
 773                         }
 774
 775                         list( $show, $value ) = explode( ':', $option );
 776                         $a[htmlspecialchars( $show )] = htmlspecialchars( $value );
 777                 }
 778
 779                 return $a;
 780         }
 781
 782         /**
 783          * Convert a submitted expiry time, which may be relative ("2 weeks", etc) or absolute
 784          * ("24 May 2034", etc), into an absolute timestamp we can put into the database.
 785          * @param $expiry String: whatever was typed into the form
 786          * @return String: timestamp or "infinity" string for the DB implementation
 787          */
 788         public static function parseExpiryInput( $expiry ) {
 789                 static $infinity;
 790                 if ( $infinity == null ) {
 791                         $infinity = wfGetDB( DB_SLAVE )->getInfinity();
 792                 }
 793
 794                 if ( $expiry == 'infinite' || $expiry == 'indefinite' ) {
 795                         $expiry = $infinity;
 796                 } else {
 797                         $expiry = strtotime( $expiry );
 798
 799                         if ( $expiry < 0 || $expiry === false ) {
 800                                 return false;
 801                         }
 802
 803                         $expiry = wfTimestamp( TS_MW, $expiry );
 804                 }
 805
 806                 return $expiry;
 807         }
 808
 809         /**
 810          * Can we do an email block?
 811          * @param $user User: the sysop wanting to make a block
 812          * @return Boolean
 813          */
 814         public static function canBlockEmail( $user ) {
 815                 global $wgEnableUserEmail, $wgSysopEmailBans;
 816
 817                 return ( $wgEnableUserEmail && $wgSysopEmailBans && $user->isAllowed( 'blockemail' ) );
 818         }
 819
 820         /**
 821          * bug 15810: blocked admins should not be able to block/unblock
 822          * others, and probably shouldn't be able to unblock themselves
 823          * either.
 824          * @param $user User|Int|String
 825          * @param $performer User user doing the request
 826          * @return Bool|String true or error message key
 827          */
 828         public static function checkUnblockSelf( $user, User $performer ) {
 829                 if ( is_int( $user ) ) {
 830                         $user = User::newFromId( $user );
 831                 } elseif ( is_string( $user ) ) {
 832                         $user = User::newFromName( $user );
 833                 }
 834
 835                 if ( $performer->isBlocked() ) {
 836                         if ( $user instanceof User && $user->getId() == $performer->getId() ) {
 837                                 # User is trying to unblock themselves
 838                                 if ( $performer->isAllowed( 'unblockself' ) ) {
 839                                         return true;
 840                                 # User blocked themselves and is now trying to reverse it
 841                                 } elseif ( $performer->blockedBy() === $performer->getName() ) {
 842                                         return true;
 843                                 } else {
 844                                         return 'ipbnounblockself';
 845                                 }
 846                         } else {
 847                                 # User is trying to block/unblock someone else
 848                                 return 'ipbblocked';
 849                         }
 850                 } else {
 851                         return true;
 852                 }
 853         }
 854
 855         /**
 856          * Return a comma-delimited list of "flags" to be passed to the log
 857          * reader for this block, to provide more information in the logs
 858          * @param $data Array from HTMLForm data
 859          * @param $type Block::TYPE_ constant (USER, RANGE, or IP)
 860          * @return string
 861          */
 862         protected static function blockLogFlags( array $data, $type ) {
 863                 global $wgBlockAllowsUTEdit;
 864                 $flags = array();
 865
 866                 # when blocking a user the option 'anononly' is not available/has no effect
 867                 # -> do not write this into log
 868                 if ( !$data['HardBlock'] && $type != Block::TYPE_USER ) {
 869                         // For grepping: message block-log-flags-anononly
 870                         $flags[] = 'anononly';
 871                 }
 872
 873                 if ( $data['CreateAccount'] ) {
 874                         // For grepping: message block-log-flags-nocreate
 875                         $flags[] = 'nocreate';
 876                 }
 877
 878                 # Same as anononly, this is not displayed when blocking an IP address
 879                 if ( !$data['AutoBlock'] && $type == Block::TYPE_USER ) {
 880                         // For grepping: message block-log-flags-noautoblock
 881                         $flags[] = 'noautoblock';
 882                 }
 883
 884                 if ( $data['DisableEmail'] ) {
 885                         // For grepping: message block-log-flags-noemail
 886                         $flags[] = 'noemail';
 887                 }
 888
 889                 if ( $wgBlockAllowsUTEdit && $data['DisableUTEdit'] ) {
 890                         // For grepping: message block-log-flags-nousertalk
 891                         $flags[] = 'nousertalk';
 892                 }
 893
 894                 if ( $data['HideUser'] ) {
 895                         // For grepping: message block-log-flags-hiddenname
 896                         $flags[] = 'hiddenname';
 897                 }
 898
 899                 return implode( ',', $flags );
 900         }
 901
 902         /**
 903          * Process the form on POST submission.
 904          * @param  $data Array
 905          * @return Bool|Array true for success, false for didn't-try, array of errors on failure
 906          */
 907         public function onSubmit( array $data ) {
 908                 // This isn't used since we need that HTMLForm that's passed in the
 909                 // second parameter. See alterForm for the real function
 910         }
 911
 912         /**
 913          * Do something exciting on successful processing of the form, most likely to show a
 914          * confirmation message
 915          */
 916         public function onSuccess() {
 917                 $out = $this->getOutput();
 918                 $out->setPageTitle( $this->msg( 'blockipsuccesssub' ) );
 919                 $out->addWikiMsg( 'blockipsuccesstext', wfEscapeWikiText( $this->target ) );
 920         }
 921 }
 922
 923 # BC @since 1.18
 924 class IPBlockForm extends SpecialBlock {}