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         /** @var User User to be blocked, as passed either by parameter (url?wpTarget=Foo)
  32          * or as subpage (Special:Block/Foo) */
  33         protected $target;
  34
  35         /** @var int Block::TYPE_ constant */
  36         protected $type;
  37
  38         /** @var User|string The previous block target */
  39         protected $previousTarget;
  40
  41         /** @var bool Whether the previous submission of the form asked for HideUser */
  42         protected $requestedHideUser;
  43
  44         /** @var bool */
  45         protected $alreadyBlocked;
  46
  47         /** @var array */
  48         protected $preErrors = array();
  49
  50         public function __construct() {
  51                 parent::__construct( 'Block', 'block' );
  52         }
  53
  54         /**
  55          * Checks that the user can unblock themselves if they are trying to do so
  56          *
  57          * @param User $user
  58          * @throws ErrorPageError
  59          */
  60         protected function checkExecutePermissions( User $user ) {
  61                 parent::checkExecutePermissions( $user );
  62
  63                 # bug 15810: blocked admins should have limited access here
  64                 $status = self::checkUnblockSelf( $this->target, $user );
  65                 if ( $status !== true ) {
  66                         throw new ErrorPageError( 'badaccess', $status );
  67                 }
  68         }
  69
  70         /**
  71          * Handle some magic here
  72          *
  73          * @param string $par
  74          */
  75         protected function setParameter( $par ) {
  76                 # Extract variables from the request.  Try not to get into a situation where we
  77                 # need to extract *every* variable from the form just for processing here, but
  78                 # there are legitimate uses for some variables
  79                 $request = $this->getRequest();
  80                 list( $this->target, $this->type ) = self::getTargetAndType( $par, $request );
  81                 if ( $this->target instanceof User ) {
  82                         # Set the 'relevant user' in the skin, so it displays links like Contributions,
  83                         # User logs, UserRights, etc.
  84                         $this->getSkin()->setRelevantUser( $this->target );
  85                 }
  86
  87                 list( $this->previousTarget, /*...*/ ) =
  88                         Block::parseTarget( $request->getVal( 'wpPreviousTarget' ) );
  89                 $this->requestedHideUser = $request->getBool( 'wpHideUser' );
  90         }
  91
  92         /**
  93          * Customizes the HTMLForm a bit
  94          *
  95          * @param HTMLForm $form
  96          */
  97         protected function alterForm( HTMLForm $form ) {
  98                 $form->setWrapperLegendMsg( 'blockip-legend' );
  99                 $form->setHeaderText( '' );
 100                 $form->setSubmitCallback( array( __CLASS__, 'processUIForm' ) );
 101                 $form->setSubmitDestructive();
 102
 103                 $msg = $this->alreadyBlocked ? 'ipb-change-block' : 'ipbsubmit';
 104                 $form->setSubmitTextMsg( $msg );
 105
 106                 # Don't need to do anything if the form has been posted
 107                 if ( !$this->getRequest()->wasPosted() && $this->preErrors ) {
 108                         $s = HTMLForm::formatErrors( $this->preErrors );
 109                         if ( $s ) {
 110                                 $form->addHeaderText( Html::rawElement(
 111                                         'div',
 112                                         array( 'class' => 'error' ),
 113                                         $s
 114                                 ) );
 115                         }
 116                 }
 117         }
 118
 119         /**
 120          * Get the HTMLForm descriptor array for the block form
 121          * @return array
 122          */
 123         protected function getFormFields() {
 124                 global $wgBlockAllowsUTEdit;
 125
 126                 $user = $this->getUser();
 127
 128                 $suggestedDurations = self::getSuggestedDurations();
 129
 130                 $a = array(
 131                         'Target' => array(
 132                                 'type' => 'text',
 133                                 'label-message' => 'ipaddressorusername',
 134                                 'id' => 'mw-bi-target',
 135                                 'size' => '45',
 136                                 'autofocus' => true,
 137                                 'required' => true,
 138                                 'validation-callback' => array( __CLASS__, 'validateTargetField' ),
 139                         ),
 140                         'Expiry' => array(
 141                                 'type' => !count( $suggestedDurations ) ? 'text' : 'selectorother',
 142                                 'label-message' => 'ipbexpiry',
 143                                 'required' => true,
 144                                 'options' => $suggestedDurations,
 145                                 'other' => $this->msg( 'ipbother' )->text(),
 146                                 'default' => $this->msg( 'ipb-default-expiry' )->inContentLanguage()->text(),
 147                         ),
 148                         'Reason' => array(
 149                                 'type' => 'selectandother',
 150                                 'maxlength' => 255,
 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                 // Allow extensions to add more fields
 222                 wfRunHooks( 'SpecialBlockModifyFormFields', array( $this, &$a ) );
 223
 224                 return $a;
 225         }
 226
 227         /**
 228          * If the user has already been blocked with similar settings, load that block
 229          * and change the defaults for the form fields to match the existing settings.
 230          * @param array $fields HTMLForm descriptor array
 231          * @return bool Whether fields were altered (that is, whether the target is
 232          *     already blocked)
 233          */
 234         protected function maybeAlterFormDefaults( &$fields ) {
 235                 # This will be overwritten by request data
 236                 $fields['Target']['default'] = (string)$this->target;
 237
 238                 # This won't be
 239                 $fields['PreviousTarget']['default'] = (string)$this->target;
 240
 241                 $block = Block::newFromTarget( $this->target );
 242
 243                 if ( $block instanceof Block && !$block->mAuto # The block exists and isn't an autoblock
 244                         && ( $this->type != Block::TYPE_RANGE # The block isn't a rangeblock
 245                                 || $block->getTarget() == $this->target ) # or if it is, the range is what we're about to block
 246                 ) {
 247                         $fields['HardBlock']['default'] = $block->isHardblock();
 248                         $fields['CreateAccount']['default'] = $block->prevents( 'createaccount' );
 249                         $fields['AutoBlock']['default'] = $block->isAutoblocking();
 250
 251                         if ( isset( $fields['DisableEmail'] ) ) {
 252                                 $fields['DisableEmail']['default'] = $block->prevents( 'sendemail' );
 253                         }
 254
 255                         if ( isset( $fields['HideUser'] ) ) {
 256                                 $fields['HideUser']['default'] = $block->mHideName;
 257                         }
 258
 259                         if ( isset( $fields['DisableUTEdit'] ) ) {
 260                                 $fields['DisableUTEdit']['default'] = $block->prevents( 'editownusertalk' );
 261                         }
 262
 263                         // If the username was hidden (ipb_deleted == 1), don't show the reason
 264                         // unless this user also has rights to hideuser: Bug 35839
 265                         if ( !$block->mHideName || $this->getUser()->isAllowed( 'hideuser' ) ) {
 266                                 $fields['Reason']['default'] = $block->mReason;
 267                         } else {
 268                                 $fields['Reason']['default'] = '';
 269                         }
 270
 271                         if ( $this->getRequest()->wasPosted() ) {
 272                                 # Ok, so we got a POST submission asking us to reblock a user.  So show the
 273                                 # confirm checkbox; the user will only see it if they haven't previously
 274                                 $fields['Confirm']['type'] = 'check';
 275                         } else {
 276                                 # We got a target, but it wasn't a POST request, so the user must have gone
 277                                 # to a link like [[Special:Block/User]].  We don't need to show the checkbox
 278                                 # as long as they go ahead and block *that* user
 279                                 $fields['Confirm']['default'] = 1;
 280                         }
 281
 282                         if ( $block->mExpiry == 'infinity' ) {
 283                                 $fields['Expiry']['default'] = 'infinite';
 284                         } else {
 285                                 $fields['Expiry']['default'] = wfTimestamp( TS_RFC2822, $block->mExpiry );
 286                         }
 287
 288                         $this->alreadyBlocked = true;
 289                         $this->preErrors[] = array( 'ipb-needreblock', wfEscapeWikiText( (string)$block->getTarget() ) );
 290                 }
 291
 292                 # We always need confirmation to do HideUser
 293                 if ( $this->requestedHideUser ) {
 294                         $fields['Confirm']['type'] = 'check';
 295                         unset( $fields['Confirm']['default'] );
 296                         $this->preErrors[] = array( 'ipb-confirmhideuser', 'ipb-confirmaction' );
 297                 }
 298
 299                 # Or if the user is trying to block themselves
 300                 if ( (string)$this->target === $this->getUser()->getName() ) {
 301                         $fields['Confirm']['type'] = 'check';
 302                         unset( $fields['Confirm']['default'] );
 303                         $this->preErrors[] = array( 'ipb-blockingself', 'ipb-confirmaction' );
 304                 }
 305         }
 306
 307         /**
 308          * Add header elements like block log entries, etc.
 309          * @return string
 310          */
 311         protected function preText() {
 312                 $this->getOutput()->addModules( 'mediawiki.special.block' );
 313
 314                 $text = $this->msg( 'blockiptext' )->parse();
 315
 316                 $otherBlockMessages = array();
 317                 if ( $this->target !== null ) {
 318                         # Get other blocks, i.e. from GlobalBlocking or TorBlock extension
 319                         wfRunHooks( 'OtherBlockLogLink', array( &$otherBlockMessages, $this->target ) );
 320
 321                         if ( count( $otherBlockMessages ) ) {
 322                                 $s = Html::rawElement(
 323                                         'h2',
 324                                         array(),
 325                                         $this->msg( 'ipb-otherblocks-header', count( $otherBlockMessages ) )->parse()
 326                                 ) . "\n";
 327
 328                                 $list = '';
 329
 330                                 foreach ( $otherBlockMessages as $link ) {
 331                                         $list .= Html::rawElement( 'li', array(), $link ) . "\n";
 332                                 }
 333
 334                                 $s .= Html::rawElement(
 335                                         'ul',
 336                                         array( 'class' => 'mw-blockip-alreadyblocked' ),
 337                                         $list
 338                                 ) . "\n";
 339
 340                                 $text .= $s;
 341                         }
 342                 }
 343
 344                 return $text;
 345         }
 346
 347         /**
 348          * Add footer elements to the form
 349          * @return string
 350          */
 351         protected function postText() {
 352                 $links = array();
 353
 354                 # Link to the user's contributions, if applicable
 355                 if ( $this->target instanceof User ) {
 356                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $this->target->getName() );
 357                         $links[] = Linker::link(
 358                                 $contribsPage,
 359                                 $this->msg( 'ipb-blocklist-contribs', $this->target->getName() )->escaped()
 360                         );
 361                 }
 362
 363                 # Link to unblock the specified user, or to a blank unblock form
 364                 if ( $this->target instanceof User ) {
 365                         $message = $this->msg(
 366                                 'ipb-unblock-addr',
 367                                 wfEscapeWikiText( $this->target->getName() )
 368                         )->parse();
 369                         $list = SpecialPage::getTitleFor( 'Unblock', $this->target->getName() );
 370                 } else {
 371                         $message = $this->msg( 'ipb-unblock' )->parse();
 372                         $list = SpecialPage::getTitleFor( 'Unblock' );
 373                 }
 374                 $links[] = Linker::linkKnown( $list, $message, array() );
 375
 376                 # Link to the block list
 377                 $links[] = Linker::linkKnown(
 378                         SpecialPage::getTitleFor( 'BlockList' ),
 379                         $this->msg( 'ipb-blocklist' )->escaped()
 380                 );
 381
 382                 $user = $this->getUser();
 383
 384                 # Link to edit the block dropdown reasons, if applicable
 385                 if ( $user->isAllowed( 'editinterface' ) ) {
 386                         $links[] = Linker::link(
 387                                 Title::makeTitle( NS_MEDIAWIKI, 'Ipbreason-dropdown' ),
 388                                 $this->msg( 'ipb-edit-dropdown' )->escaped(),
 389                                 array(),
 390                                 array( 'action' => 'edit' )
 391                         );
 392                 }
 393
 394                 $text = Html::rawElement(
 395                         'p',
 396                         array( 'class' => 'mw-ipb-conveniencelinks' ),
 397                         $this->getLanguage()->pipeList( $links )
 398                 );
 399
 400                 $userTitle = self::getTargetUserTitle( $this->target );
 401                 if ( $userTitle ) {
 402                         # Get relevant extracts from the block and suppression logs, if possible
 403                         $out = '';
 404
 405                         LogEventsList::showLogExtract(
 406                                 $out,
 407                                 'block',
 408                                 $userTitle,
 409                                 '',
 410                                 array(
 411                                         'lim' => 10,
 412                                         'msgKey' => array( 'blocklog-showlog', $userTitle->getText() ),
 413                                         'showIfEmpty' => false
 414                                 )
 415                         );
 416                         $text .= $out;
 417
 418                         # Add suppression block entries if allowed
 419                         if ( $user->isAllowed( 'suppressionlog' ) ) {
 420                                 LogEventsList::showLogExtract(
 421                                         $out,
 422                                         'suppress',
 423                                         $userTitle,
 424                                         '',
 425                                         array(
 426                                                 'lim' => 10,
 427                                                 'conds' => array( 'log_action' => array( 'block', 'reblock', 'unblock' ) ),
 428                                                 'msgKey' => array( 'blocklog-showsuppresslog', $userTitle->getText() ),
 429                                                 'showIfEmpty' => false
 430                                         )
 431                                 );
 432
 433                                 $text .= $out;
 434                         }
 435                 }
 436
 437                 return $text;
 438         }
 439
 440         /**
 441          * Get a user page target for things like logs.
 442          * This handles account and IP range targets.
 443          * @param User|string $target
 444          * @return Title|null
 445          */
 446         protected static function getTargetUserTitle( $target ) {
 447                 if ( $target instanceof User ) {
 448                         return $target->getUserPage();
 449                 } elseif ( IP::isIPAddress( $target ) ) {
 450                         return Title::makeTitleSafe( NS_USER, $target );
 451                 }
 452
 453                 return null;
 454         }
 455
 456         /**
 457          * Determine the target of the block, and the type of target
 458          * @todo Should be in Block.php?
 459          * @param string $par Subpage parameter passed to setup, or data value from
 460          *     the HTMLForm
 461          * @param WebRequest $request Optionally try and get data from a request too
 462          * @return array( User|string|null, Block::TYPE_ constant|null )
 463          */
 464         public static function getTargetAndType( $par, WebRequest $request = null ) {
 465                 $i = 0;
 466                 $target = null;
 467
 468                 while ( true ) {
 469                         switch ( $i++ ) {
 470                                 case 0:
 471                                         # The HTMLForm will check wpTarget first and only if it doesn't get
 472                                         # a value use the default, which will be generated from the options
 473                                         # below; so this has to have a higher precedence here than $par, or
 474                                         # we could end up with different values in $this->target and the HTMLForm!
 475                                         if ( $request instanceof WebRequest ) {
 476                                                 $target = $request->getText( 'wpTarget', null );
 477                                         }
 478                                         break;
 479                                 case 1:
 480                                         $target = $par;
 481                                         break;
 482                                 case 2:
 483                                         if ( $request instanceof WebRequest ) {
 484                                                 $target = $request->getText( 'ip', null );
 485                                         }
 486                                         break;
 487                                 case 3:
 488                                         # B/C @since 1.18
 489                                         if ( $request instanceof WebRequest ) {
 490                                                 $target = $request->getText( 'wpBlockAddress', null );
 491                                         }
 492                                         break;
 493                                 case 4:
 494                                         break 2;
 495                         }
 496
 497                         list( $target, $type ) = Block::parseTarget( $target );
 498
 499                         if ( $type !== null ) {
 500                                 return array( $target, $type );
 501                         }
 502                 }
 503
 504                 return array( null, null );
 505         }
 506
 507         /**
 508          * HTMLForm field validation-callback for Target field.
 509          * @since 1.18
 510          * @param string $value
 511          * @param array $alldata
 512          * @param HTMLForm $form
 513          * @return Message
 514          */
 515         public static function validateTargetField( $value, $alldata, $form ) {
 516                 $status = self::validateTarget( $value, $form->getUser() );
 517                 if ( !$status->isOK() ) {
 518                         $errors = $status->getErrorsArray();
 519
 520                         return call_user_func_array( array( $form, 'msg' ), $errors[0] );
 521                 } else {
 522                         return true;
 523                 }
 524         }
 525
 526         /**
 527          * Validate a block target.
 528          *
 529          * @since 1.21
 530          * @param string $value Block target to check
 531          * @param User $user Performer of the block
 532          * @return Status
 533          */
 534         public static function validateTarget( $value, User $user ) {
 535                 global $wgBlockCIDRLimit;
 536
 537                 /** @var User $target */
 538                 list( $target, $type ) = self::getTargetAndType( $value );
 539                 $status = Status::newGood( $target );
 540
 541                 if ( $type == Block::TYPE_USER ) {
 542                         if ( $target->isAnon() ) {
 543                                 $status->fatal(
 544                                         'nosuchusershort',
 545                                         wfEscapeWikiText( $target->getName() )
 546                                 );
 547                         }
 548
 549                         $unblockStatus = self::checkUnblockSelf( $target, $user );
 550                         if ( $unblockStatus !== true ) {
 551                                 $status->fatal( 'badaccess', $unblockStatus );
 552                         }
 553                 } elseif ( $type == Block::TYPE_RANGE ) {
 554                         list( $ip, $range ) = explode( '/', $target, 2 );
 555
 556                         if (
 557                                 ( IP::isIPv4( $ip ) && $wgBlockCIDRLimit['IPv4'] == 32 ) ||
 558                                 ( IP::isIPv6( $ip ) && $wgBlockCIDRLimit['IPv6'] == 128 )
 559                         ) {
 560                                 // Range block effectively disabled
 561                                 $status->fatal( 'range_block_disabled' );
 562                         }
 563
 564                         if (
 565                                 ( IP::isIPv4( $ip ) && $range > 32 ) ||
 566                                 ( IP::isIPv6( $ip ) && $range > 128 )
 567                         ) {
 568                                 // Dodgy range
 569                                 $status->fatal( 'ip_range_invalid' );
 570                         }
 571
 572                         if ( IP::isIPv4( $ip ) && $range < $wgBlockCIDRLimit['IPv4'] ) {
 573                                 $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv4'] );
 574                         }
 575
 576                         if ( IP::isIPv6( $ip ) && $range < $wgBlockCIDRLimit['IPv6'] ) {
 577                                 $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv6'] );
 578                         }
 579                 } elseif ( $type == Block::TYPE_IP ) {
 580                         # All is well
 581                 } else {
 582                         $status->fatal( 'badipaddress' );
 583                 }
 584
 585                 return $status;
 586         }
 587
 588         /**
 589          * Submit callback for an HTMLForm object, will simply pass
 590          * @param array $data
 591          * @param HTMLForm $form
 592          * @return bool|string
 593          */
 594         public static function processUIForm( array $data, HTMLForm $form ) {
 595                 return self::processForm( $data, $form->getContext() );
 596         }
 597
 598         /**
 599          * Given the form data, actually implement a block
 600          * @param array $data
 601          * @param IContextSource $context
 602          * @return bool|string
 603          */
 604         public static function processForm( array $data, IContextSource $context ) {
 605                 global $wgBlockAllowsUTEdit, $wgHideUserContribLimit, $wgContLang;
 606
 607                 $performer = $context->getUser();
 608
 609                 // Handled by field validator callback
 610                 // self::validateTargetField( $data['Target'] );
 611
 612                 # This might have been a hidden field or a checkbox, so interesting data
 613                 # can come from it
 614                 $data['Confirm'] = !in_array( $data['Confirm'], array( '', '0', null, false ), true );
 615
 616                 /** @var User $target */
 617                 list( $target, $type ) = self::getTargetAndType( $data['Target'] );
 618                 if ( $type == Block::TYPE_USER ) {
 619                         $user = $target;
 620                         $target = $user->getName();
 621                         $userId = $user->getId();
 622
 623                         # Give admins a heads-up before they go and block themselves.  Much messier
 624                         # to do this for IPs, but it's pretty unlikely they'd ever get the 'block'
 625                         # permission anyway, although the code does allow for it.
 626                         # Note: Important to use $target instead of $data['Target']
 627                         # since both $data['PreviousTarget'] and $target are normalized
 628                         # but $data['target'] gets overriden by (non-normalized) request variable
 629                         # from previous request.
 630                         if ( $target === $performer->getName() &&
 631                                 ( $data['PreviousTarget'] !== $target || !$data['Confirm'] )
 632                         ) {
 633                                 return array( 'ipb-blockingself', 'ipb-confirmaction' );
 634                         }
 635                 } elseif ( $type == Block::TYPE_RANGE ) {
 636                         $userId = 0;
 637                 } elseif ( $type == Block::TYPE_IP ) {
 638                         $target = $target->getName();
 639                         $userId = 0;
 640                 } else {
 641                         # This should have been caught in the form field validation
 642                         return array( 'badipaddress' );
 643                 }
 644
 645                 if ( ( strlen( $data['Expiry'] ) == 0 ) || ( strlen( $data['Expiry'] ) > 50 )
 646                         || !self::parseExpiryInput( $data['Expiry'] )
 647                 ) {
 648                         return array( 'ipb_expiry_invalid' );
 649                 }
 650
 651                 if ( !isset( $data['DisableEmail'] ) ) {
 652                         $data['DisableEmail'] = false;
 653                 }
 654
 655                 # If the user has done the form 'properly', they won't even have been given the
 656                 # option to suppress-block unless they have the 'hideuser' permission
 657                 if ( !isset( $data['HideUser'] ) ) {
 658                         $data['HideUser'] = false;
 659                 }
 660
 661                 if ( $data['HideUser'] ) {
 662                         if ( !$performer->isAllowed( 'hideuser' ) ) {
 663                                 # this codepath is unreachable except by a malicious user spoofing forms,
 664                                 # or by race conditions (user has oversight and sysop, loads block form,
 665                                 # and is de-oversighted before submission); so need to fail completely
 666                                 # rather than just silently disable hiding
 667                                 return array( 'badaccess-group0' );
 668                         }
 669
 670                         # Recheck params here...
 671                         if ( $type != Block::TYPE_USER ) {
 672                                 $data['HideUser'] = false; # IP users should not be hidden
 673                         } elseif ( !in_array( $data['Expiry'], array( 'infinite', 'infinity', 'indefinite' ) ) ) {
 674                                 # Bad expiry.
 675                                 return array( 'ipb_expiry_temp' );
 676                         } elseif ( $wgHideUserContribLimit !== false
 677                                 && $user->getEditCount() > $wgHideUserContribLimit
 678                         ) {
 679                                 # Typically, the user should have a handful of edits.
 680                                 # Disallow hiding users with many edits for performance.
 681                                 return array( array( 'ipb_hide_invalid',
 682                                         Message::numParam( $wgHideUserContribLimit ) ) );
 683                         } elseif ( !$data['Confirm'] ) {
 684                                 return array( 'ipb-confirmhideuser', 'ipb-confirmaction' );
 685                         }
 686                 }
 687
 688                 # Create block object.
 689                 $block = new Block();
 690                 $block->setTarget( $target );
 691                 $block->setBlocker( $performer );
 692                 # Truncate reason for whole multibyte characters
 693                 $block->mReason = $wgContLang->truncate( $data['Reason'][0], 255 );
 694                 $block->mExpiry = self::parseExpiryInput( $data['Expiry'] );
 695                 $block->prevents( 'createaccount', $data['CreateAccount'] );
 696                 $block->prevents( 'editownusertalk', ( !$wgBlockAllowsUTEdit || $data['DisableUTEdit'] ) );
 697                 $block->prevents( 'sendemail', $data['DisableEmail'] );
 698                 $block->isHardblock( $data['HardBlock'] );
 699                 $block->isAutoblocking( $data['AutoBlock'] );
 700                 $block->mHideName = $data['HideUser'];
 701
 702                 $reason = array( 'hookaborted' );
 703                 if ( !wfRunHooks( 'BlockIp', array( &$block, &$performer, &$reason ) ) ) {
 704                         return $reason;
 705                 }
 706
 707                 # Try to insert block. Is there a conflicting block?
 708                 $status = $block->insert();
 709                 if ( !$status ) {
 710                         # Indicates whether the user is confirming the block and is aware of
 711                         # the conflict (did not change the block target in the meantime)
 712                         $blockNotConfirmed = !$data['Confirm'] || ( array_key_exists( 'PreviousTarget', $data )
 713                                 && $data['PreviousTarget'] !== $target );
 714
 715                         # Special case for API - bug 32434
 716                         $reblockNotAllowed = ( array_key_exists( 'Reblock', $data ) && !$data['Reblock'] );
 717
 718                         # Show form unless the user is already aware of this...
 719                         if ( $blockNotConfirmed || $reblockNotAllowed ) {
 720                                 return array( array( 'ipb_already_blocked', $block->getTarget() ) );
 721                                 # Otherwise, try to update the block...
 722                         } else {
 723                                 # This returns direct blocks before autoblocks/rangeblocks, since we should
 724                                 # be sure the user is blocked by now it should work for our purposes
 725                                 $currentBlock = Block::newFromTarget( $target );
 726
 727                                 if ( $block->equals( $currentBlock ) ) {
 728                                         return array( array( 'ipb_already_blocked', $block->getTarget() ) );
 729                                 }
 730
 731                                 # If the name was hidden and the blocking user cannot hide
 732                                 # names, then don't allow any block changes...
 733                                 if ( $currentBlock->mHideName && !$performer->isAllowed( 'hideuser' ) ) {
 734                                         return array( 'cant-see-hidden-user' );
 735                                 }
 736
 737                                 $currentBlock->isHardblock( $block->isHardblock() );
 738                                 $currentBlock->prevents( 'createaccount', $block->prevents( 'createaccount' ) );
 739                                 $currentBlock->mExpiry = $block->mExpiry;
 740                                 $currentBlock->isAutoblocking( $block->isAutoblocking() );
 741                                 $currentBlock->mHideName = $block->mHideName;
 742                                 $currentBlock->prevents( 'sendemail', $block->prevents( 'sendemail' ) );
 743                                 $currentBlock->prevents( 'editownusertalk', $block->prevents( 'editownusertalk' ) );
 744                                 $currentBlock->mReason = $block->mReason;
 745
 746                                 $status = $currentBlock->update();
 747
 748                                 $logaction = 'reblock';
 749
 750                                 # Unset _deleted fields if requested
 751                                 if ( $currentBlock->mHideName && !$data['HideUser'] ) {
 752                                         RevisionDeleteUser::unsuppressUserName( $target, $userId );
 753                                 }
 754
 755                                 # If hiding/unhiding a name, this should go in the private logs
 756                                 if ( (bool)$currentBlock->mHideName ) {
 757                                         $data['HideUser'] = true;
 758                                 }
 759                         }
 760                 } else {
 761                         $logaction = 'block';
 762                 }
 763
 764                 wfRunHooks( 'BlockIpComplete', array( $block, $performer ) );
 765
 766                 # Set *_deleted fields if requested
 767                 if ( $data['HideUser'] ) {
 768                         RevisionDeleteUser::suppressUserName( $target, $userId );
 769                 }
 770
 771                 # Can't watch a rangeblock
 772                 if ( $type != Block::TYPE_RANGE && $data['Watch'] ) {
 773                         WatchAction::doWatch(
 774                                 Title::makeTitle( NS_USER, $target ),
 775                                 $performer,
 776                                 WatchedItem::IGNORE_USER_RIGHTS
 777                         );
 778                 }
 779
 780                 # Block constructor sanitizes certain block options on insert
 781                 $data['BlockEmail'] = $block->prevents( 'sendemail' );
 782                 $data['AutoBlock'] = $block->isAutoblocking();
 783
 784                 # Prepare log parameters
 785                 $logParams = array();
 786                 $logParams[] = $data['Expiry'];
 787                 $logParams[] = self::blockLogFlags( $data, $type );
 788
 789                 # Make log entry, if the name is hidden, put it in the oversight log
 790                 $log_type = $data['HideUser'] ? 'suppress' : 'block';
 791                 $log = new LogPage( $log_type );
 792                 $log_id = $log->addEntry(
 793                         $logaction,
 794                         Title::makeTitle( NS_USER, $target ),
 795                         $data['Reason'][0],
 796                         $logParams,
 797                         $performer
 798                 );
 799                 # Relate log ID to block IDs (bug 25763)
 800                 $blockIds = array_merge( array( $status['id'] ), $status['autoIds'] );
 801                 $log->addRelations( 'ipb_id', $blockIds, $log_id );
 802
 803                 # Report to the user
 804                 return true;
 805         }
 806
 807         /**
 808          * Get an array of suggested block durations from MediaWiki:Ipboptions
 809          * @todo FIXME: This uses a rather odd syntax for the options, should it be converted
 810          *     to the standard "**<duration>|<displayname>" format?
 811          * @param Language|null $lang The language to get the durations in, or null to use
 812          *     the wiki's content language
 813          * @return array
 814          */
 815         public static function getSuggestedDurations( $lang = null ) {
 816                 $a = array();
 817                 $msg = $lang === null
 818                         ? wfMessage( 'ipboptions' )->inContentLanguage()->text()
 819                         : wfMessage( 'ipboptions' )->inLanguage( $lang )->text();
 820
 821                 if ( $msg == '-' ) {
 822                         return array();
 823                 }
 824
 825                 foreach ( explode( ',', $msg ) as $option ) {
 826                         if ( strpos( $option, ':' ) === false ) {
 827                                 $option = "$option:$option";
 828                         }
 829
 830                         list( $show, $value ) = explode( ':', $option );
 831                         $a[htmlspecialchars( $show )] = htmlspecialchars( $value );
 832                 }
 833
 834                 return $a;
 835         }
 836
 837         /**
 838          * Convert a submitted expiry time, which may be relative ("2 weeks", etc) or absolute
 839          * ("24 May 2034", etc), into an absolute timestamp we can put into the database.
 840          * @param string $expiry Whatever was typed into the form
 841          * @return string Timestamp or "infinity" string for the DB implementation
 842          */
 843         public static function parseExpiryInput( $expiry ) {
 844                 static $infinity;
 845                 if ( $infinity == null ) {
 846                         $infinity = wfGetDB( DB_SLAVE )->getInfinity();
 847                 }
 848
 849                 if ( $expiry == 'infinite' || $expiry == 'indefinite' ) {
 850                         $expiry = $infinity;
 851                 } else {
 852                         $expiry = strtotime( $expiry );
 853
 854                         if ( $expiry < 0 || $expiry === false ) {
 855                                 return false;
 856                         }
 857
 858                         $expiry = wfTimestamp( TS_MW, $expiry );
 859                 }
 860
 861                 return $expiry;
 862         }
 863
 864         /**
 865          * Can we do an email block?
 866          * @param User $user The sysop wanting to make a block
 867          * @return bool
 868          */
 869         public static function canBlockEmail( $user ) {
 870                 global $wgEnableUserEmail, $wgSysopEmailBans;
 871
 872                 return ( $wgEnableUserEmail && $wgSysopEmailBans && $user->isAllowed( 'blockemail' ) );
 873         }
 874
 875         /**
 876          * bug 15810: blocked admins should not be able to block/unblock
 877          * others, and probably shouldn't be able to unblock themselves
 878          * either.
 879          * @param User|int|string $user
 880          * @param User $performer User doing the request
 881          * @return bool|string True or error message key
 882          */
 883         public static function checkUnblockSelf( $user, User $performer ) {
 884                 if ( is_int( $user ) ) {
 885                         $user = User::newFromId( $user );
 886                 } elseif ( is_string( $user ) ) {
 887                         $user = User::newFromName( $user );
 888                 }
 889
 890                 if ( $performer->isBlocked() ) {
 891                         if ( $user instanceof User && $user->getId() == $performer->getId() ) {
 892                                 # User is trying to unblock themselves
 893                                 if ( $performer->isAllowed( 'unblockself' ) ) {
 894                                         return true;
 895                                         # User blocked themselves and is now trying to reverse it
 896                                 } elseif ( $performer->blockedBy() === $performer->getName() ) {
 897                                         return true;
 898                                 } else {
 899                                         return 'ipbnounblockself';
 900                                 }
 901                         } else {
 902                                 # User is trying to block/unblock someone else
 903                                 return 'ipbblocked';
 904                         }
 905                 } else {
 906                         return true;
 907                 }
 908         }
 909
 910         /**
 911          * Return a comma-delimited list of "flags" to be passed to the log
 912          * reader for this block, to provide more information in the logs
 913          * @param array $data From HTMLForm data
 914          * @param int $type Block::TYPE_ constant (USER, RANGE, or IP)
 915          * @return string
 916          */
 917         protected static function blockLogFlags( array $data, $type ) {
 918                 global $wgBlockAllowsUTEdit;
 919                 $flags = array();
 920
 921                 # when blocking a user the option 'anononly' is not available/has no effect
 922                 # -> do not write this into log
 923                 if ( !$data['HardBlock'] && $type != Block::TYPE_USER ) {
 924                         // For grepping: message block-log-flags-anononly
 925                         $flags[] = 'anononly';
 926                 }
 927
 928                 if ( $data['CreateAccount'] ) {
 929                         // For grepping: message block-log-flags-nocreate
 930                         $flags[] = 'nocreate';
 931                 }
 932
 933                 # Same as anononly, this is not displayed when blocking an IP address
 934                 if ( !$data['AutoBlock'] && $type == Block::TYPE_USER ) {
 935                         // For grepping: message block-log-flags-noautoblock
 936                         $flags[] = 'noautoblock';
 937                 }
 938
 939                 if ( $data['DisableEmail'] ) {
 940                         // For grepping: message block-log-flags-noemail
 941                         $flags[] = 'noemail';
 942                 }
 943
 944                 if ( $wgBlockAllowsUTEdit && $data['DisableUTEdit'] ) {
 945                         // For grepping: message block-log-flags-nousertalk
 946                         $flags[] = 'nousertalk';
 947                 }
 948
 949                 if ( $data['HideUser'] ) {
 950                         // For grepping: message block-log-flags-hiddenname
 951                         $flags[] = 'hiddenname';
 952                 }
 953
 954                 return implode( ',', $flags );
 955         }
 956
 957         /**
 958          * Process the form on POST submission.
 959          * @param array $data
 960          * @return bool|array True for success, false for didn't-try, array of errors on failure
 961          */
 962         public function onSubmit( array $data ) {
 963                 // This isn't used since we need that HTMLForm that's passed in the
 964                 // second parameter. See alterForm for the real function
 965         }
 966
 967         /**
 968          * Do something exciting on successful processing of the form, most likely to show a
 969          * confirmation message
 970          */
 971         public function onSuccess() {
 972                 $out = $this->getOutput();
 973                 $out->setPageTitle( $this->msg( 'blockipsuccesssub' ) );
 974                 $out->addWikiMsg( 'blockipsuccesstext', wfEscapeWikiText( $this->target ) );
 975         }
 976
 977         protected function getGroupName() {
 978                 return 'users';
 979         }
 980 }