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->setSubmitDestructive();
 101
 102                 $msg = $this->alreadyBlocked ? 'ipb-change-block' : 'ipbsubmit';
 103                 $form->setSubmitTextMsg( $msg );
 104
 105                 $this->addHelpLink( 'Help:Blocking users' );
 106
 107                 # Don't need to do anything if the form has been posted
 108                 if ( !$this->getRequest()->wasPosted() && $this->preErrors ) {
 109                         $s = $form->formatErrors( $this->preErrors );
 110                         if ( $s ) {
 111                                 $form->addHeaderText( Html::rawElement(
 112                                         'div',
 113                                         array( 'class' => 'error' ),
 114                                         $s
 115                                 ) );
 116                         }
 117                 }
 118         }
 119
 120         /**
 121          * Get the HTMLForm descriptor array for the block form
 122          * @return array
 123          */
 124         protected function getFormFields() {
 125                 global $wgBlockAllowsUTEdit;
 126
 127                 $user = $this->getUser();
 128
 129                 $suggestedDurations = self::getSuggestedDurations();
 130
 131                 $a = array(
 132                         'Target' => array(
 133                                 'type' => 'text',
 134                                 'label-message' => 'ipaddressorusername',
 135                                 'id' => 'mw-bi-target',
 136                                 'size' => '45',
 137                                 'autofocus' => true,
 138                                 'required' => true,
 139                                 'validation-callback' => array( __CLASS__, 'validateTargetField' ),
 140                                 'cssclass' => 'mw-autocomplete-user', // used by mediawiki.userSuggest
 141                         ),
 142                         'Expiry' => array(
 143                                 'type' => !count( $suggestedDurations ) ? 'text' : 'selectorother',
 144                                 'label-message' => 'ipbexpiry',
 145                                 'required' => true,
 146                                 'options' => $suggestedDurations,
 147                                 'other' => $this->msg( 'ipbother' )->text(),
 148                                 'default' => $this->msg( 'ipb-default-expiry' )->inContentLanguage()->text(),
 149                         ),
 150                         'Reason' => array(
 151                                 'type' => 'selectandother',
 152                                 'maxlength' => 255,
 153                                 'label-message' => 'ipbreason',
 154                                 'options-message' => 'ipbreason-dropdown',
 155                         ),
 156                         'CreateAccount' => array(
 157                                 'type' => 'check',
 158                                 'label-message' => 'ipbcreateaccount',
 159                                 'default' => true,
 160                         ),
 161                 );
 162
 163                 if ( self::canBlockEmail( $user ) ) {
 164                         $a['DisableEmail'] = array(
 165                                 'type' => 'check',
 166                                 'label-message' => 'ipbemailban',
 167                         );
 168                 }
 169
 170                 if ( $wgBlockAllowsUTEdit ) {
 171                         $a['DisableUTEdit'] = array(
 172                                 'type' => 'check',
 173                                 'label-message' => 'ipb-disableusertalk',
 174                                 'default' => false,
 175                         );
 176                 }
 177
 178                 $a['AutoBlock'] = array(
 179                         'type' => 'check',
 180                         'label-message' => 'ipbenableautoblock',
 181                         'default' => true,
 182                 );
 183
 184                 # Allow some users to hide name from block log, blocklist and listusers
 185                 if ( $user->isAllowed( 'hideuser' ) ) {
 186                         $a['HideUser'] = array(
 187                                 'type' => 'check',
 188                                 'label-message' => 'ipbhidename',
 189                                 'cssclass' => 'mw-block-hideuser',
 190                         );
 191                 }
 192
 193                 # Watchlist their user page? (Only if user is logged in)
 194                 if ( $user->isLoggedIn() ) {
 195                         $a['Watch'] = array(
 196                                 'type' => 'check',
 197                                 'label-message' => 'ipbwatchuser',
 198                         );
 199                 }
 200
 201                 $a['HardBlock'] = array(
 202                         'type' => 'check',
 203                         'label-message' => 'ipb-hardblock',
 204                         'default' => false,
 205                 );
 206
 207                 # This is basically a copy of the Target field, but the user can't change it, so we
 208                 # can see if the warnings we maybe showed to the user before still apply
 209                 $a['PreviousTarget'] = array(
 210                         'type' => 'hidden',
 211                         'default' => false,
 212                 );
 213
 214                 # We'll turn this into a checkbox if we need to
 215                 $a['Confirm'] = array(
 216                         'type' => 'hidden',
 217                         'default' => '',
 218                         'label-message' => 'ipb-confirm',
 219                 );
 220
 221                 $this->maybeAlterFormDefaults( $a );
 222
 223                 // Allow extensions to add more fields
 224                 Hooks::run( 'SpecialBlockModifyFormFields', array( $this, &$a ) );
 225
 226                 return $a;
 227         }
 228
 229         /**
 230          * If the user has already been blocked with similar settings, load that block
 231          * and change the defaults for the form fields to match the existing settings.
 232          * @param array $fields HTMLForm descriptor array
 233          * @return bool Whether fields were altered (that is, whether the target is
 234          *     already blocked)
 235          */
 236         protected function maybeAlterFormDefaults( &$fields ) {
 237                 # This will be overwritten by request data
 238                 $fields['Target']['default'] = (string)$this->target;
 239
 240                 if ( $this->target ) {
 241                         $status = self::validateTarget( $this->target, $this->getUser() );
 242                         if ( !$status->isOK() ) {
 243                                 $errors = $status->getErrorsArray();
 244                                 $this->preErrors = array_merge( $this->preErrors, $errors );
 245                         }
 246                 }
 247
 248                 # This won't be
 249                 $fields['PreviousTarget']['default'] = (string)$this->target;
 250
 251                 $block = Block::newFromTarget( $this->target );
 252
 253                 if ( $block instanceof Block && !$block->mAuto # The block exists and isn't an autoblock
 254                         && ( $this->type != Block::TYPE_RANGE # The block isn't a rangeblock
 255                                 || $block->getTarget() == $this->target ) # or if it is, the range is what we're about to block
 256                 ) {
 257                         $fields['HardBlock']['default'] = $block->isHardblock();
 258                         $fields['CreateAccount']['default'] = $block->prevents( 'createaccount' );
 259                         $fields['AutoBlock']['default'] = $block->isAutoblocking();
 260
 261                         if ( isset( $fields['DisableEmail'] ) ) {
 262                                 $fields['DisableEmail']['default'] = $block->prevents( 'sendemail' );
 263                         }
 264
 265                         if ( isset( $fields['HideUser'] ) ) {
 266                                 $fields['HideUser']['default'] = $block->mHideName;
 267                         }
 268
 269                         if ( isset( $fields['DisableUTEdit'] ) ) {
 270                                 $fields['DisableUTEdit']['default'] = $block->prevents( 'editownusertalk' );
 271                         }
 272
 273                         // If the username was hidden (ipb_deleted == 1), don't show the reason
 274                         // unless this user also has rights to hideuser: Bug 35839
 275                         if ( !$block->mHideName || $this->getUser()->isAllowed( 'hideuser' ) ) {
 276                                 $fields['Reason']['default'] = $block->mReason;
 277                         } else {
 278                                 $fields['Reason']['default'] = '';
 279                         }
 280
 281                         if ( $this->getRequest()->wasPosted() ) {
 282                                 # Ok, so we got a POST submission asking us to reblock a user.  So show the
 283                                 # confirm checkbox; the user will only see it if they haven't previously
 284                                 $fields['Confirm']['type'] = 'check';
 285                         } else {
 286                                 # We got a target, but it wasn't a POST request, so the user must have gone
 287                                 # to a link like [[Special:Block/User]].  We don't need to show the checkbox
 288                                 # as long as they go ahead and block *that* user
 289                                 $fields['Confirm']['default'] = 1;
 290                         }
 291
 292                         if ( $block->mExpiry == 'infinity' ) {
 293                                 $fields['Expiry']['default'] = 'infinite';
 294                         } else {
 295                                 $fields['Expiry']['default'] = wfTimestamp( TS_RFC2822, $block->mExpiry );
 296                         }
 297
 298                         $this->alreadyBlocked = true;
 299                         $this->preErrors[] = array( 'ipb-needreblock', wfEscapeWikiText( (string)$block->getTarget() ) );
 300                 }
 301
 302                 # We always need confirmation to do HideUser
 303                 if ( $this->requestedHideUser ) {
 304                         $fields['Confirm']['type'] = 'check';
 305                         unset( $fields['Confirm']['default'] );
 306                         $this->preErrors[] = array( 'ipb-confirmhideuser', 'ipb-confirmaction' );
 307                 }
 308
 309                 # Or if the user is trying to block themselves
 310                 if ( (string)$this->target === $this->getUser()->getName() ) {
 311                         $fields['Confirm']['type'] = 'check';
 312                         unset( $fields['Confirm']['default'] );
 313                         $this->preErrors[] = array( 'ipb-blockingself', 'ipb-confirmaction' );
 314                 }
 315         }
 316
 317         /**
 318          * Add header elements like block log entries, etc.
 319          * @return string
 320          */
 321         protected function preText() {
 322                 $this->getOutput()->addModules( array( 'mediawiki.special.block', 'mediawiki.userSuggest' ) );
 323
 324                 $text = $this->msg( 'blockiptext' )->parse();
 325
 326                 $otherBlockMessages = array();
 327                 if ( $this->target !== null ) {
 328                         # Get other blocks, i.e. from GlobalBlocking or TorBlock extension
 329                         Hooks::run( 'OtherBlockLogLink', array( &$otherBlockMessages, $this->target ) );
 330
 331                         if ( count( $otherBlockMessages ) ) {
 332                                 $s = Html::rawElement(
 333                                         'h2',
 334                                         array(),
 335                                         $this->msg( 'ipb-otherblocks-header', count( $otherBlockMessages ) )->parse()
 336                                 ) . "\n";
 337
 338                                 $list = '';
 339
 340                                 foreach ( $otherBlockMessages as $link ) {
 341                                         $list .= Html::rawElement( 'li', array(), $link ) . "\n";
 342                                 }
 343
 344                                 $s .= Html::rawElement(
 345                                         'ul',
 346                                         array( 'class' => 'mw-blockip-alreadyblocked' ),
 347                                         $list
 348                                 ) . "\n";
 349
 350                                 $text .= $s;
 351                         }
 352                 }
 353
 354                 return $text;
 355         }
 356
 357         /**
 358          * Add footer elements to the form
 359          * @return string
 360          */
 361         protected function postText() {
 362                 $links = array();
 363
 364                 # Link to the user's contributions, if applicable
 365                 if ( $this->target instanceof User ) {
 366                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $this->target->getName() );
 367                         $links[] = Linker::link(
 368                                 $contribsPage,
 369                                 $this->msg( 'ipb-blocklist-contribs', $this->target->getName() )->escaped()
 370                         );
 371                 }
 372
 373                 # Link to unblock the specified user, or to a blank unblock form
 374                 if ( $this->target instanceof User ) {
 375                         $message = $this->msg(
 376                                 'ipb-unblock-addr',
 377                                 wfEscapeWikiText( $this->target->getName() )
 378                         )->parse();
 379                         $list = SpecialPage::getTitleFor( 'Unblock', $this->target->getName() );
 380                 } else {
 381                         $message = $this->msg( 'ipb-unblock' )->parse();
 382                         $list = SpecialPage::getTitleFor( 'Unblock' );
 383                 }
 384                 $links[] = Linker::linkKnown( $list, $message, array() );
 385
 386                 # Link to the block list
 387                 $links[] = Linker::linkKnown(
 388                         SpecialPage::getTitleFor( 'BlockList' ),
 389                         $this->msg( 'ipb-blocklist' )->escaped()
 390                 );
 391
 392                 $user = $this->getUser();
 393
 394                 # Link to edit the block dropdown reasons, if applicable
 395                 if ( $user->isAllowed( 'editinterface' ) ) {
 396                         $links[] = Linker::linkKnown(
 397                                 $this->msg( 'ipbreason-dropdown' )->inContentLanguage()->getTitle(),
 398                                 $this->msg( 'ipb-edit-dropdown' )->escaped(),
 399                                 array(),
 400                                 array( 'action' => 'edit' )
 401                         );
 402                 }
 403
 404                 $text = Html::rawElement(
 405                         'p',
 406                         array( 'class' => 'mw-ipb-conveniencelinks' ),
 407                         $this->getLanguage()->pipeList( $links )
 408                 );
 409
 410                 $userTitle = self::getTargetUserTitle( $this->target );
 411                 if ( $userTitle ) {
 412                         # Get relevant extracts from the block and suppression logs, if possible
 413                         $out = '';
 414
 415                         LogEventsList::showLogExtract(
 416                                 $out,
 417                                 'block',
 418                                 $userTitle,
 419                                 '',
 420                                 array(
 421                                         'lim' => 10,
 422                                         'msgKey' => array( 'blocklog-showlog', $userTitle->getText() ),
 423                                         'showIfEmpty' => false
 424                                 )
 425                         );
 426                         $text .= $out;
 427
 428                         # Add suppression block entries if allowed
 429                         if ( $user->isAllowed( 'suppressionlog' ) ) {
 430                                 LogEventsList::showLogExtract(
 431                                         $out,
 432                                         'suppress',
 433                                         $userTitle,
 434                                         '',
 435                                         array(
 436                                                 'lim' => 10,
 437                                                 'conds' => array( 'log_action' => array( 'block', 'reblock', 'unblock' ) ),
 438                                                 'msgKey' => array( 'blocklog-showsuppresslog', $userTitle->getText() ),
 439                                                 'showIfEmpty' => false
 440                                         )
 441                                 );
 442
 443                                 $text .= $out;
 444                         }
 445                 }
 446
 447                 return $text;
 448         }
 449
 450         /**
 451          * Get a user page target for things like logs.
 452          * This handles account and IP range targets.
 453          * @param User|string $target
 454          * @return Title|null
 455          */
 456         protected static function getTargetUserTitle( $target ) {
 457                 if ( $target instanceof User ) {
 458                         return $target->getUserPage();
 459                 } elseif ( IP::isIPAddress( $target ) ) {
 460                         return Title::makeTitleSafe( NS_USER, $target );
 461                 }
 462
 463                 return null;
 464         }
 465
 466         /**
 467          * Determine the target of the block, and the type of target
 468          * @todo Should be in Block.php?
 469          * @param string $par Subpage parameter passed to setup, or data value from
 470          *     the HTMLForm
 471          * @param WebRequest $request Optionally try and get data from a request too
 472          * @return array( User|string|null, Block::TYPE_ constant|null )
 473          */
 474         public static function getTargetAndType( $par, WebRequest $request = null ) {
 475                 $i = 0;
 476                 $target = null;
 477
 478                 while ( true ) {
 479                         switch ( $i++ ) {
 480                                 case 0:
 481                                         # The HTMLForm will check wpTarget first and only if it doesn't get
 482                                         # a value use the default, which will be generated from the options
 483                                         # below; so this has to have a higher precedence here than $par, or
 484                                         # we could end up with different values in $this->target and the HTMLForm!
 485                                         if ( $request instanceof WebRequest ) {
 486                                                 $target = $request->getText( 'wpTarget', null );
 487                                         }
 488                                         break;
 489                                 case 1:
 490                                         $target = $par;
 491                                         break;
 492                                 case 2:
 493                                         if ( $request instanceof WebRequest ) {
 494                                                 $target = $request->getText( 'ip', null );
 495                                         }
 496                                         break;
 497                                 case 3:
 498                                         # B/C @since 1.18
 499                                         if ( $request instanceof WebRequest ) {
 500                                                 $target = $request->getText( 'wpBlockAddress', null );
 501                                         }
 502                                         break;
 503                                 case 4:
 504                                         break 2;
 505                         }
 506
 507                         list( $target, $type ) = Block::parseTarget( $target );
 508
 509                         if ( $type !== null ) {
 510                                 return array( $target, $type );
 511                         }
 512                 }
 513
 514                 return array( null, null );
 515         }
 516
 517         /**
 518          * HTMLForm field validation-callback for Target field.
 519          * @since 1.18
 520          * @param string $value
 521          * @param array $alldata
 522          * @param HTMLForm $form
 523          * @return Message
 524          */
 525         public static function validateTargetField( $value, $alldata, $form ) {
 526                 $status = self::validateTarget( $value, $form->getUser() );
 527                 if ( !$status->isOK() ) {
 528                         $errors = $status->getErrorsArray();
 529
 530                         return call_user_func_array( array( $form, 'msg' ), $errors[0] );
 531                 } else {
 532                         return true;
 533                 }
 534         }
 535
 536         /**
 537          * Validate a block target.
 538          *
 539          * @since 1.21
 540          * @param string $value Block target to check
 541          * @param User $user Performer of the block
 542          * @return Status
 543          */
 544         public static function validateTarget( $value, User $user ) {
 545                 global $wgBlockCIDRLimit;
 546
 547                 /** @var User $target */
 548                 list( $target, $type ) = self::getTargetAndType( $value );
 549                 $status = Status::newGood( $target );
 550
 551                 if ( $type == Block::TYPE_USER ) {
 552                         if ( $target->isAnon() ) {
 553                                 $status->fatal(
 554                                         'nosuchusershort',
 555                                         wfEscapeWikiText( $target->getName() )
 556                                 );
 557                         }
 558
 559                         $unblockStatus = self::checkUnblockSelf( $target, $user );
 560                         if ( $unblockStatus !== true ) {
 561                                 $status->fatal( 'badaccess', $unblockStatus );
 562                         }
 563                 } elseif ( $type == Block::TYPE_RANGE ) {
 564                         list( $ip, $range ) = explode( '/', $target, 2 );
 565
 566                         if (
 567                                 ( IP::isIPv4( $ip ) && $wgBlockCIDRLimit['IPv4'] == 32 ) ||
 568                                 ( IP::isIPv6( $ip ) && $wgBlockCIDRLimit['IPv6'] == 128 )
 569                         ) {
 570                                 // Range block effectively disabled
 571                                 $status->fatal( 'range_block_disabled' );
 572                         }
 573
 574                         if (
 575                                 ( IP::isIPv4( $ip ) && $range > 32 ) ||
 576                                 ( IP::isIPv6( $ip ) && $range > 128 )
 577                         ) {
 578                                 // Dodgy range
 579                                 $status->fatal( 'ip_range_invalid' );
 580                         }
 581
 582                         if ( IP::isIPv4( $ip ) && $range < $wgBlockCIDRLimit['IPv4'] ) {
 583                                 $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv4'] );
 584                         }
 585
 586                         if ( IP::isIPv6( $ip ) && $range < $wgBlockCIDRLimit['IPv6'] ) {
 587                                 $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv6'] );
 588                         }
 589                 } elseif ( $type == Block::TYPE_IP ) {
 590                         # All is well
 591                 } else {
 592                         $status->fatal( 'badipaddress' );
 593                 }
 594
 595                 return $status;
 596         }
 597
 598         /**
 599          * Given the form data, actually implement a block. This is also called from ApiBlock.
 600          *
 601          * @param array $data
 602          * @param IContextSource $context
 603          * @return bool|string
 604          */
 605         public static function processForm( array $data, IContextSource $context ) {
 606                 global $wgBlockAllowsUTEdit, $wgHideUserContribLimit, $wgContLang;
 607
 608                 $performer = $context->getUser();
 609
 610                 // Handled by field validator callback
 611                 // self::validateTargetField( $data['Target'] );
 612
 613                 # This might have been a hidden field or a checkbox, so interesting data
 614                 # can come from it
 615                 $data['Confirm'] = !in_array( $data['Confirm'], array( '', '0', null, false ), true );
 616
 617                 /** @var User $target */
 618                 list( $target, $type ) = self::getTargetAndType( $data['Target'] );
 619                 if ( $type == Block::TYPE_USER ) {
 620                         $user = $target;
 621                         $target = $user->getName();
 622                         $userId = $user->getId();
 623
 624                         # Give admins a heads-up before they go and block themselves.  Much messier
 625                         # to do this for IPs, but it's pretty unlikely they'd ever get the 'block'
 626                         # permission anyway, although the code does allow for it.
 627                         # Note: Important to use $target instead of $data['Target']
 628                         # since both $data['PreviousTarget'] and $target are normalized
 629                         # but $data['target'] gets overridden by (non-normalized) request variable
 630                         # from previous request.
 631                         if ( $target === $performer->getName() &&
 632                                 ( $data['PreviousTarget'] !== $target || !$data['Confirm'] )
 633                         ) {
 634                                 return array( 'ipb-blockingself', 'ipb-confirmaction' );
 635                         }
 636                 } elseif ( $type == Block::TYPE_RANGE ) {
 637                         $userId = 0;
 638                 } elseif ( $type == Block::TYPE_IP ) {
 639                         $target = $target->getName();
 640                         $userId = 0;
 641                 } else {
 642                         # This should have been caught in the form field validation
 643                         return array( 'badipaddress' );
 644                 }
 645
 646                 if ( ( strlen( $data['Expiry'] ) == 0 ) || ( strlen( $data['Expiry'] ) > 50 )
 647                         || !self::parseExpiryInput( $data['Expiry'] )
 648                 ) {
 649                         return array( 'ipb_expiry_invalid' );
 650                 }
 651
 652                 if ( !isset( $data['DisableEmail'] ) ) {
 653                         $data['DisableEmail'] = false;
 654                 }
 655
 656                 # If the user has done the form 'properly', they won't even have been given the
 657                 # option to suppress-block unless they have the 'hideuser' permission
 658                 if ( !isset( $data['HideUser'] ) ) {
 659                         $data['HideUser'] = false;
 660                 }
 661
 662                 if ( $data['HideUser'] ) {
 663                         if ( !$performer->isAllowed( 'hideuser' ) ) {
 664                                 # this codepath is unreachable except by a malicious user spoofing forms,
 665                                 # or by race conditions (user has hideuser and block rights, loads block form,
 666                                 # and loses hideuser rights before submission); so need to fail completely
 667                                 # rather than just silently disable hiding
 668                                 return array( 'badaccess-group0' );
 669                         }
 670
 671                         # Recheck params here...
 672                         if ( $type != Block::TYPE_USER ) {
 673                                 $data['HideUser'] = false; # IP users should not be hidden
 674                         } elseif ( !wfIsInfinity( $data['Expiry'] ) ) {
 675                                 # Bad expiry.
 676                                 return array( 'ipb_expiry_temp' );
 677                         } elseif ( $wgHideUserContribLimit !== false
 678                                 && $user->getEditCount() > $wgHideUserContribLimit
 679                         ) {
 680                                 # Typically, the user should have a handful of edits.
 681                                 # Disallow hiding users with many edits for performance.
 682                                 return array( array( 'ipb_hide_invalid',
 683                                         Message::numParam( $wgHideUserContribLimit ) ) );
 684                         } elseif ( !$data['Confirm'] ) {
 685                                 return array( 'ipb-confirmhideuser', 'ipb-confirmaction' );
 686                         }
 687                 }
 688
 689                 # Create block object.
 690                 $block = new Block();
 691                 $block->setTarget( $target );
 692                 $block->setBlocker( $performer );
 693                 # Truncate reason for whole multibyte characters
 694                 $block->mReason = $wgContLang->truncate( $data['Reason'][0], 255 );
 695                 $block->mExpiry = self::parseExpiryInput( $data['Expiry'] );
 696                 $block->prevents( 'createaccount', $data['CreateAccount'] );
 697                 $block->prevents( 'editownusertalk', ( !$wgBlockAllowsUTEdit || $data['DisableUTEdit'] ) );
 698                 $block->prevents( 'sendemail', $data['DisableEmail'] );
 699                 $block->isHardblock( $data['HardBlock'] );
 700                 $block->isAutoblocking( $data['AutoBlock'] );
 701                 $block->mHideName = $data['HideUser'];
 702
 703                 $reason = array( 'hookaborted' );
 704                 if ( !Hooks::run( 'BlockIp', array( &$block, &$performer, &$reason ) ) ) {
 705                         return $reason;
 706                 }
 707
 708                 # Try to insert block. Is there a conflicting block?
 709                 $status = $block->insert();
 710                 if ( !$status ) {
 711                         # Indicates whether the user is confirming the block and is aware of
 712                         # the conflict (did not change the block target in the meantime)
 713                         $blockNotConfirmed = !$data['Confirm'] || ( array_key_exists( 'PreviousTarget', $data )
 714                                 && $data['PreviousTarget'] !== $target );
 715
 716                         # Special case for API - bug 32434
 717                         $reblockNotAllowed = ( array_key_exists( 'Reblock', $data ) && !$data['Reblock'] );
 718
 719                         # Show form unless the user is already aware of this...
 720                         if ( $blockNotConfirmed || $reblockNotAllowed ) {
 721                                 return array( array( 'ipb_already_blocked', $block->getTarget() ) );
 722                                 # Otherwise, try to update the block...
 723                         } else {
 724                                 # This returns direct blocks before autoblocks/rangeblocks, since we should
 725                                 # be sure the user is blocked by now it should work for our purposes
 726                                 $currentBlock = Block::newFromTarget( $target );
 727
 728                                 if ( $block->equals( $currentBlock ) ) {
 729                                         return array( array( 'ipb_already_blocked', $block->getTarget() ) );
 730                                 }
 731
 732                                 # If the name was hidden and the blocking user cannot hide
 733                                 # names, then don't allow any block changes...
 734                                 if ( $currentBlock->mHideName && !$performer->isAllowed( 'hideuser' ) ) {
 735                                         return array( 'cant-see-hidden-user' );
 736                                 }
 737
 738                                 $currentBlock->isHardblock( $block->isHardblock() );
 739                                 $currentBlock->prevents( 'createaccount', $block->prevents( 'createaccount' ) );
 740                                 $currentBlock->mExpiry = $block->mExpiry;
 741                                 $currentBlock->isAutoblocking( $block->isAutoblocking() );
 742                                 $currentBlock->mHideName = $block->mHideName;
 743                                 $currentBlock->prevents( 'sendemail', $block->prevents( 'sendemail' ) );
 744                                 $currentBlock->prevents( 'editownusertalk', $block->prevents( 'editownusertalk' ) );
 745                                 $currentBlock->mReason = $block->mReason;
 746
 747                                 $status = $currentBlock->update();
 748
 749                                 $logaction = 'reblock';
 750
 751                                 # Unset _deleted fields if requested
 752                                 if ( $currentBlock->mHideName && !$data['HideUser'] ) {
 753                                         RevisionDeleteUser::unsuppressUserName( $target, $userId );
 754                                 }
 755
 756                                 # If hiding/unhiding a name, this should go in the private logs
 757                                 if ( (bool)$currentBlock->mHideName ) {
 758                                         $data['HideUser'] = true;
 759                                 }
 760                         }
 761                 } else {
 762                         $logaction = 'block';
 763                 }
 764
 765                 Hooks::run( 'BlockIpComplete', array( $block, $performer ) );
 766
 767                 # Set *_deleted fields if requested
 768                 if ( $data['HideUser'] ) {
 769                         RevisionDeleteUser::suppressUserName( $target, $userId );
 770                 }
 771
 772                 # Can't watch a rangeblock
 773                 if ( $type != Block::TYPE_RANGE && $data['Watch'] ) {
 774                         WatchAction::doWatch(
 775                                 Title::makeTitle( NS_USER, $target ),
 776                                 $performer,
 777                                 WatchedItem::IGNORE_USER_RIGHTS
 778                         );
 779                 }
 780
 781                 # Block constructor sanitizes certain block options on insert
 782                 $data['BlockEmail'] = $block->prevents( 'sendemail' );
 783                 $data['AutoBlock'] = $block->isAutoblocking();
 784
 785                 # Prepare log parameters
 786                 $logParams = array();
 787                 $logParams['5::duration'] = $data['Expiry'];
 788                 $logParams['6::flags'] = self::blockLogFlags( $data, $type );
 789
 790                 # Make log entry, if the name is hidden, put it in the suppression log
 791                 $log_type = $data['HideUser'] ? 'suppress' : 'block';
 792                 $logEntry = new ManualLogEntry( $log_type, $logaction );
 793                 $logEntry->setTarget( Title::makeTitle( NS_USER, $target ) );
 794                 $logEntry->setComment( $data['Reason'][0] );
 795                 $logEntry->setPerformer( $performer );
 796                 $logEntry->setParameters( $logParams );
 797                 # Relate log ID to block IDs (bug 25763)
 798                 $blockIds = array_merge( array( $status['id'] ), $status['autoIds'] );
 799                 $logEntry->setRelations( array( 'ipb_id' => $blockIds ) );
 800                 $logId = $logEntry->insert();
 801                 $logEntry->publish( $logId );
 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                         $a[$show] = $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'
 842          */
 843         public static function parseExpiryInput( $expiry ) {
 844                 if ( wfIsInfinity( $expiry ) ) {
 845                         $expiry = 'infinity';
 846                 } else {
 847                         $expiry = strtotime( $expiry );
 848
 849                         if ( $expiry < 0 || $expiry === false ) {
 850                                 return false;
 851                         }
 852
 853                         $expiry = wfTimestamp( TS_MW, $expiry );
 854                 }
 855
 856                 return $expiry;
 857         }
 858
 859         /**
 860          * Can we do an email block?
 861          * @param User $user The sysop wanting to make a block
 862          * @return bool
 863          */
 864         public static function canBlockEmail( $user ) {
 865                 global $wgEnableUserEmail, $wgSysopEmailBans;
 866
 867                 return ( $wgEnableUserEmail && $wgSysopEmailBans && $user->isAllowed( 'blockemail' ) );
 868         }
 869
 870         /**
 871          * bug 15810: blocked admins should not be able to block/unblock
 872          * others, and probably shouldn't be able to unblock themselves
 873          * either.
 874          * @param User|int|string $user
 875          * @param User $performer User doing the request
 876          * @return bool|string True or error message key
 877          */
 878         public static function checkUnblockSelf( $user, User $performer ) {
 879                 if ( is_int( $user ) ) {
 880                         $user = User::newFromId( $user );
 881                 } elseif ( is_string( $user ) ) {
 882                         $user = User::newFromName( $user );
 883                 }
 884
 885                 if ( $performer->isBlocked() ) {
 886                         if ( $user instanceof User && $user->getId() == $performer->getId() ) {
 887                                 # User is trying to unblock themselves
 888                                 if ( $performer->isAllowed( 'unblockself' ) ) {
 889                                         return true;
 890                                         # User blocked themselves and is now trying to reverse it
 891                                 } elseif ( $performer->blockedBy() === $performer->getName() ) {
 892                                         return true;
 893                                 } else {
 894                                         return 'ipbnounblockself';
 895                                 }
 896                         } else {
 897                                 # User is trying to block/unblock someone else
 898                                 return 'ipbblocked';
 899                         }
 900                 } else {
 901                         return true;
 902                 }
 903         }
 904
 905         /**
 906          * Return a comma-delimited list of "flags" to be passed to the log
 907          * reader for this block, to provide more information in the logs
 908          * @param array $data From HTMLForm data
 909          * @param int $type Block::TYPE_ constant (USER, RANGE, or IP)
 910          * @return string
 911          */
 912         protected static function blockLogFlags( array $data, $type ) {
 913                 global $wgBlockAllowsUTEdit;
 914                 $flags = array();
 915
 916                 # when blocking a user the option 'anononly' is not available/has no effect
 917                 # -> do not write this into log
 918                 if ( !$data['HardBlock'] && $type != Block::TYPE_USER ) {
 919                         // For grepping: message block-log-flags-anononly
 920                         $flags[] = 'anononly';
 921                 }
 922
 923                 if ( $data['CreateAccount'] ) {
 924                         // For grepping: message block-log-flags-nocreate
 925                         $flags[] = 'nocreate';
 926                 }
 927
 928                 # Same as anononly, this is not displayed when blocking an IP address
 929                 if ( !$data['AutoBlock'] && $type == Block::TYPE_USER ) {
 930                         // For grepping: message block-log-flags-noautoblock
 931                         $flags[] = 'noautoblock';
 932                 }
 933
 934                 if ( $data['DisableEmail'] ) {
 935                         // For grepping: message block-log-flags-noemail
 936                         $flags[] = 'noemail';
 937                 }
 938
 939                 if ( $wgBlockAllowsUTEdit && $data['DisableUTEdit'] ) {
 940                         // For grepping: message block-log-flags-nousertalk
 941                         $flags[] = 'nousertalk';
 942                 }
 943
 944                 if ( $data['HideUser'] ) {
 945                         // For grepping: message block-log-flags-hiddenname
 946                         $flags[] = 'hiddenname';
 947                 }
 948
 949                 return implode( ',', $flags );
 950         }
 951
 952         /**
 953          * Process the form on POST submission.
 954          * @param array $data
 955          * @param HTMLForm $form
 956          * @return bool|array True for success, false for didn't-try, array of errors on failure
 957          */
 958         public function onSubmit( array $data, HTMLForm $form = null ) {
 959                 return self::processForm( $data, $form->getContext() );
 960         }
 961
 962         /**
 963          * Do something exciting on successful processing of the form, most likely to show a
 964          * confirmation message
 965          */
 966         public function onSuccess() {
 967                 $out = $this->getOutput();
 968                 $out->setPageTitle( $this->msg( 'blockipsuccesssub' ) );
 969                 $out->addWikiMsg( 'blockipsuccesstext', wfEscapeWikiText( $this->target ) );
 970         }
 971
 972         protected function getGroupName() {
 973                 return 'users';
 974         }
 975 }