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                 $this->getOutput()->addModuleStyles( 'mediawiki.special' );
 365
 366                 # Link to the user's contributions, if applicable
 367                 if ( $this->target instanceof User ) {
 368                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $this->target->getName() );
 369                         $links[] = Linker::link(
 370                                 $contribsPage,
 371                                 $this->msg( 'ipb-blocklist-contribs', $this->target->getName() )->escaped()
 372                         );
 373                 }
 374
 375                 # Link to unblock the specified user, or to a blank unblock form
 376                 if ( $this->target instanceof User ) {
 377                         $message = $this->msg(
 378                                 'ipb-unblock-addr',
 379                                 wfEscapeWikiText( $this->target->getName() )
 380                         )->parse();
 381                         $list = SpecialPage::getTitleFor( 'Unblock', $this->target->getName() );
 382                 } else {
 383                         $message = $this->msg( 'ipb-unblock' )->parse();
 384                         $list = SpecialPage::getTitleFor( 'Unblock' );
 385                 }
 386                 $links[] = Linker::linkKnown( $list, $message, array() );
 387
 388                 # Link to the block list
 389                 $links[] = Linker::linkKnown(
 390                         SpecialPage::getTitleFor( 'BlockList' ),
 391                         $this->msg( 'ipb-blocklist' )->escaped()
 392                 );
 393
 394                 $user = $this->getUser();
 395
 396                 # Link to edit the block dropdown reasons, if applicable
 397                 if ( $user->isAllowed( 'editinterface' ) ) {
 398                         $links[] = Linker::linkKnown(
 399                                 $this->msg( 'ipbreason-dropdown' )->inContentLanguage()->getTitle(),
 400                                 $this->msg( 'ipb-edit-dropdown' )->escaped(),
 401                                 array(),
 402                                 array( 'action' => 'edit' )
 403                         );
 404                 }
 405
 406                 $text = Html::rawElement(
 407                         'p',
 408                         array( 'class' => 'mw-ipb-conveniencelinks' ),
 409                         $this->getLanguage()->pipeList( $links )
 410                 );
 411
 412                 $userTitle = self::getTargetUserTitle( $this->target );
 413                 if ( $userTitle ) {
 414                         # Get relevant extracts from the block and suppression logs, if possible
 415                         $out = '';
 416
 417                         LogEventsList::showLogExtract(
 418                                 $out,
 419                                 'block',
 420                                 $userTitle,
 421                                 '',
 422                                 array(
 423                                         'lim' => 10,
 424                                         'msgKey' => array( 'blocklog-showlog', $userTitle->getText() ),
 425                                         'showIfEmpty' => false
 426                                 )
 427                         );
 428                         $text .= $out;
 429
 430                         # Add suppression block entries if allowed
 431                         if ( $user->isAllowed( 'suppressionlog' ) ) {
 432                                 LogEventsList::showLogExtract(
 433                                         $out,
 434                                         'suppress',
 435                                         $userTitle,
 436                                         '',
 437                                         array(
 438                                                 'lim' => 10,
 439                                                 'conds' => array( 'log_action' => array( 'block', 'reblock', 'unblock' ) ),
 440                                                 'msgKey' => array( 'blocklog-showsuppresslog', $userTitle->getText() ),
 441                                                 'showIfEmpty' => false
 442                                         )
 443                                 );
 444
 445                                 $text .= $out;
 446                         }
 447                 }
 448
 449                 return $text;
 450         }
 451
 452         /**
 453          * Get a user page target for things like logs.
 454          * This handles account and IP range targets.
 455          * @param User|string $target
 456          * @return Title|null
 457          */
 458         protected static function getTargetUserTitle( $target ) {
 459                 if ( $target instanceof User ) {
 460                         return $target->getUserPage();
 461                 } elseif ( IP::isIPAddress( $target ) ) {
 462                         return Title::makeTitleSafe( NS_USER, $target );
 463                 }
 464
 465                 return null;
 466         }
 467
 468         /**
 469          * Determine the target of the block, and the type of target
 470          * @todo Should be in Block.php?
 471          * @param string $par Subpage parameter passed to setup, or data value from
 472          *     the HTMLForm
 473          * @param WebRequest $request Optionally try and get data from a request too
 474          * @return array( User|string|null, Block::TYPE_ constant|null )
 475          */
 476         public static function getTargetAndType( $par, WebRequest $request = null ) {
 477                 $i = 0;
 478                 $target = null;
 479
 480                 while ( true ) {
 481                         switch ( $i++ ) {
 482                                 case 0:
 483                                         # The HTMLForm will check wpTarget first and only if it doesn't get
 484                                         # a value use the default, which will be generated from the options
 485                                         # below; so this has to have a higher precedence here than $par, or
 486                                         # we could end up with different values in $this->target and the HTMLForm!
 487                                         if ( $request instanceof WebRequest ) {
 488                                                 $target = $request->getText( 'wpTarget', null );
 489                                         }
 490                                         break;
 491                                 case 1:
 492                                         $target = $par;
 493                                         break;
 494                                 case 2:
 495                                         if ( $request instanceof WebRequest ) {
 496                                                 $target = $request->getText( 'ip', null );
 497                                         }
 498                                         break;
 499                                 case 3:
 500                                         # B/C @since 1.18
 501                                         if ( $request instanceof WebRequest ) {
 502                                                 $target = $request->getText( 'wpBlockAddress', null );
 503                                         }
 504                                         break;
 505                                 case 4:
 506                                         break 2;
 507                         }
 508
 509                         list( $target, $type ) = Block::parseTarget( $target );
 510
 511                         if ( $type !== null ) {
 512                                 return array( $target, $type );
 513                         }
 514                 }
 515
 516                 return array( null, null );
 517         }
 518
 519         /**
 520          * HTMLForm field validation-callback for Target field.
 521          * @since 1.18
 522          * @param string $value
 523          * @param array $alldata
 524          * @param HTMLForm $form
 525          * @return Message
 526          */
 527         public static function validateTargetField( $value, $alldata, $form ) {
 528                 $status = self::validateTarget( $value, $form->getUser() );
 529                 if ( !$status->isOK() ) {
 530                         $errors = $status->getErrorsArray();
 531
 532                         return call_user_func_array( array( $form, 'msg' ), $errors[0] );
 533                 } else {
 534                         return true;
 535                 }
 536         }
 537
 538         /**
 539          * Validate a block target.
 540          *
 541          * @since 1.21
 542          * @param string $value Block target to check
 543          * @param User $user Performer of the block
 544          * @return Status
 545          */
 546         public static function validateTarget( $value, User $user ) {
 547                 global $wgBlockCIDRLimit;
 548
 549                 /** @var User $target */
 550                 list( $target, $type ) = self::getTargetAndType( $value );
 551                 $status = Status::newGood( $target );
 552
 553                 if ( $type == Block::TYPE_USER ) {
 554                         if ( $target->isAnon() ) {
 555                                 $status->fatal(
 556                                         'nosuchusershort',
 557                                         wfEscapeWikiText( $target->getName() )
 558                                 );
 559                         }
 560
 561                         $unblockStatus = self::checkUnblockSelf( $target, $user );
 562                         if ( $unblockStatus !== true ) {
 563                                 $status->fatal( 'badaccess', $unblockStatus );
 564                         }
 565                 } elseif ( $type == Block::TYPE_RANGE ) {
 566                         list( $ip, $range ) = explode( '/', $target, 2 );
 567
 568                         if (
 569                                 ( IP::isIPv4( $ip ) && $wgBlockCIDRLimit['IPv4'] == 32 ) ||
 570                                 ( IP::isIPv6( $ip ) && $wgBlockCIDRLimit['IPv6'] == 128 )
 571                         ) {
 572                                 // Range block effectively disabled
 573                                 $status->fatal( 'range_block_disabled' );
 574                         }
 575
 576                         if (
 577                                 ( IP::isIPv4( $ip ) && $range > 32 ) ||
 578                                 ( IP::isIPv6( $ip ) && $range > 128 )
 579                         ) {
 580                                 // Dodgy range
 581                                 $status->fatal( 'ip_range_invalid' );
 582                         }
 583
 584                         if ( IP::isIPv4( $ip ) && $range < $wgBlockCIDRLimit['IPv4'] ) {
 585                                 $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv4'] );
 586                         }
 587
 588                         if ( IP::isIPv6( $ip ) && $range < $wgBlockCIDRLimit['IPv6'] ) {
 589                                 $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv6'] );
 590                         }
 591                 } elseif ( $type == Block::TYPE_IP ) {
 592                         # All is well
 593                 } else {
 594                         $status->fatal( 'badipaddress' );
 595                 }
 596
 597                 return $status;
 598         }
 599
 600         /**
 601          * Given the form data, actually implement a block. This is also called from ApiBlock.
 602          *
 603          * @param array $data
 604          * @param IContextSource $context
 605          * @return bool|string
 606          */
 607         public static function processForm( array $data, IContextSource $context ) {
 608                 global $wgBlockAllowsUTEdit, $wgHideUserContribLimit, $wgContLang;
 609
 610                 $performer = $context->getUser();
 611
 612                 // Handled by field validator callback
 613                 // self::validateTargetField( $data['Target'] );
 614
 615                 # This might have been a hidden field or a checkbox, so interesting data
 616                 # can come from it
 617                 $data['Confirm'] = !in_array( $data['Confirm'], array( '', '0', null, false ), true );
 618
 619                 /** @var User $target */
 620                 list( $target, $type ) = self::getTargetAndType( $data['Target'] );
 621                 if ( $type == Block::TYPE_USER ) {
 622                         $user = $target;
 623                         $target = $user->getName();
 624                         $userId = $user->getId();
 625
 626                         # Give admins a heads-up before they go and block themselves.  Much messier
 627                         # to do this for IPs, but it's pretty unlikely they'd ever get the 'block'
 628                         # permission anyway, although the code does allow for it.
 629                         # Note: Important to use $target instead of $data['Target']
 630                         # since both $data['PreviousTarget'] and $target are normalized
 631                         # but $data['target'] gets overridden by (non-normalized) request variable
 632                         # from previous request.
 633                         if ( $target === $performer->getName() &&
 634                                 ( $data['PreviousTarget'] !== $target || !$data['Confirm'] )
 635                         ) {
 636                                 return array( 'ipb-blockingself', 'ipb-confirmaction' );
 637                         }
 638                 } elseif ( $type == Block::TYPE_RANGE ) {
 639                         $userId = 0;
 640                 } elseif ( $type == Block::TYPE_IP ) {
 641                         $target = $target->getName();
 642                         $userId = 0;
 643                 } else {
 644                         # This should have been caught in the form field validation
 645                         return array( 'badipaddress' );
 646                 }
 647
 648                 if ( ( strlen( $data['Expiry'] ) == 0 ) || ( strlen( $data['Expiry'] ) > 50 )
 649                         || !self::parseExpiryInput( $data['Expiry'] )
 650                 ) {
 651                         return array( 'ipb_expiry_invalid' );
 652                 }
 653
 654                 if ( !isset( $data['DisableEmail'] ) ) {
 655                         $data['DisableEmail'] = false;
 656                 }
 657
 658                 # If the user has done the form 'properly', they won't even have been given the
 659                 # option to suppress-block unless they have the 'hideuser' permission
 660                 if ( !isset( $data['HideUser'] ) ) {
 661                         $data['HideUser'] = false;
 662                 }
 663
 664                 if ( $data['HideUser'] ) {
 665                         if ( !$performer->isAllowed( 'hideuser' ) ) {
 666                                 # this codepath is unreachable except by a malicious user spoofing forms,
 667                                 # or by race conditions (user has hideuser and block rights, loads block form,
 668                                 # and loses hideuser rights before submission); so need to fail completely
 669                                 # rather than just silently disable hiding
 670                                 return array( 'badaccess-group0' );
 671                         }
 672
 673                         # Recheck params here...
 674                         if ( $type != Block::TYPE_USER ) {
 675                                 $data['HideUser'] = false; # IP users should not be hidden
 676                         } elseif ( !wfIsInfinity( $data['Expiry'] ) ) {
 677                                 # Bad expiry.
 678                                 return array( 'ipb_expiry_temp' );
 679                         } elseif ( $wgHideUserContribLimit !== false
 680                                 && $user->getEditCount() > $wgHideUserContribLimit
 681                         ) {
 682                                 # Typically, the user should have a handful of edits.
 683                                 # Disallow hiding users with many edits for performance.
 684                                 return array( array( 'ipb_hide_invalid',
 685                                         Message::numParam( $wgHideUserContribLimit ) ) );
 686                         } elseif ( !$data['Confirm'] ) {
 687                                 return array( 'ipb-confirmhideuser', 'ipb-confirmaction' );
 688                         }
 689                 }
 690
 691                 # Create block object.
 692                 $block = new Block();
 693                 $block->setTarget( $target );
 694                 $block->setBlocker( $performer );
 695                 # Truncate reason for whole multibyte characters
 696                 $block->mReason = $wgContLang->truncate( $data['Reason'][0], 255 );
 697                 $block->mExpiry = self::parseExpiryInput( $data['Expiry'] );
 698                 $block->prevents( 'createaccount', $data['CreateAccount'] );
 699                 $block->prevents( 'editownusertalk', ( !$wgBlockAllowsUTEdit || $data['DisableUTEdit'] ) );
 700                 $block->prevents( 'sendemail', $data['DisableEmail'] );
 701                 $block->isHardblock( $data['HardBlock'] );
 702                 $block->isAutoblocking( $data['AutoBlock'] );
 703                 $block->mHideName = $data['HideUser'];
 704
 705                 $reason = array( 'hookaborted' );
 706                 if ( !Hooks::run( 'BlockIp', array( &$block, &$performer, &$reason ) ) ) {
 707                         return $reason;
 708                 }
 709
 710                 # Try to insert block. Is there a conflicting block?
 711                 $status = $block->insert();
 712                 if ( !$status ) {
 713                         # Indicates whether the user is confirming the block and is aware of
 714                         # the conflict (did not change the block target in the meantime)
 715                         $blockNotConfirmed = !$data['Confirm'] || ( array_key_exists( 'PreviousTarget', $data )
 716                                 && $data['PreviousTarget'] !== $target );
 717
 718                         # Special case for API - bug 32434
 719                         $reblockNotAllowed = ( array_key_exists( 'Reblock', $data ) && !$data['Reblock'] );
 720
 721                         # Show form unless the user is already aware of this...
 722                         if ( $blockNotConfirmed || $reblockNotAllowed ) {
 723                                 return array( array( 'ipb_already_blocked', $block->getTarget() ) );
 724                                 # Otherwise, try to update the block...
 725                         } else {
 726                                 # This returns direct blocks before autoblocks/rangeblocks, since we should
 727                                 # be sure the user is blocked by now it should work for our purposes
 728                                 $currentBlock = Block::newFromTarget( $target );
 729
 730                                 if ( $block->equals( $currentBlock ) ) {
 731                                         return array( array( 'ipb_already_blocked', $block->getTarget() ) );
 732                                 }
 733
 734                                 # If the name was hidden and the blocking user cannot hide
 735                                 # names, then don't allow any block changes...
 736                                 if ( $currentBlock->mHideName && !$performer->isAllowed( 'hideuser' ) ) {
 737                                         return array( 'cant-see-hidden-user' );
 738                                 }
 739
 740                                 $currentBlock->isHardblock( $block->isHardblock() );
 741                                 $currentBlock->prevents( 'createaccount', $block->prevents( 'createaccount' ) );
 742                                 $currentBlock->mExpiry = $block->mExpiry;
 743                                 $currentBlock->isAutoblocking( $block->isAutoblocking() );
 744                                 $currentBlock->mHideName = $block->mHideName;
 745                                 $currentBlock->prevents( 'sendemail', $block->prevents( 'sendemail' ) );
 746                                 $currentBlock->prevents( 'editownusertalk', $block->prevents( 'editownusertalk' ) );
 747                                 $currentBlock->mReason = $block->mReason;
 748
 749                                 $status = $currentBlock->update();
 750
 751                                 $logaction = 'reblock';
 752
 753                                 # Unset _deleted fields if requested
 754                                 if ( $currentBlock->mHideName && !$data['HideUser'] ) {
 755                                         RevisionDeleteUser::unsuppressUserName( $target, $userId );
 756                                 }
 757
 758                                 # If hiding/unhiding a name, this should go in the private logs
 759                                 if ( (bool)$currentBlock->mHideName ) {
 760                                         $data['HideUser'] = true;
 761                                 }
 762                         }
 763                 } else {
 764                         $logaction = 'block';
 765                 }
 766
 767                 Hooks::run( 'BlockIpComplete', array( $block, $performer ) );
 768
 769                 # Set *_deleted fields if requested
 770                 if ( $data['HideUser'] ) {
 771                         RevisionDeleteUser::suppressUserName( $target, $userId );
 772                 }
 773
 774                 # Can't watch a rangeblock
 775                 if ( $type != Block::TYPE_RANGE && $data['Watch'] ) {
 776                         WatchAction::doWatch(
 777                                 Title::makeTitle( NS_USER, $target ),
 778                                 $performer,
 779                                 WatchedItem::IGNORE_USER_RIGHTS
 780                         );
 781                 }
 782
 783                 # Block constructor sanitizes certain block options on insert
 784                 $data['BlockEmail'] = $block->prevents( 'sendemail' );
 785                 $data['AutoBlock'] = $block->isAutoblocking();
 786
 787                 # Prepare log parameters
 788                 $logParams = array();
 789                 $logParams['5::duration'] = $data['Expiry'];
 790                 $logParams['6::flags'] = self::blockLogFlags( $data, $type );
 791
 792                 # Make log entry, if the name is hidden, put it in the suppression log
 793                 $log_type = $data['HideUser'] ? 'suppress' : 'block';
 794                 $logEntry = new ManualLogEntry( $log_type, $logaction );
 795                 $logEntry->setTarget( Title::makeTitle( NS_USER, $target ) );
 796                 $logEntry->setComment( $data['Reason'][0] );
 797                 $logEntry->setPerformer( $performer );
 798                 $logEntry->setParameters( $logParams );
 799                 # Relate log ID to block IDs (bug 25763)
 800                 $blockIds = array_merge( array( $status['id'] ), $status['autoIds'] );
 801                 $logEntry->setRelations( array( 'ipb_id' => $blockIds ) );
 802                 $logId = $logEntry->insert();
 803                 $logEntry->publish( $logId );
 804
 805                 # Report to the user
 806                 return true;
 807         }
 808
 809         /**
 810          * Get an array of suggested block durations from MediaWiki:Ipboptions
 811          * @todo FIXME: This uses a rather odd syntax for the options, should it be converted
 812          *     to the standard "**<duration>|<displayname>" format?
 813          * @param Language|null $lang The language to get the durations in, or null to use
 814          *     the wiki's content language
 815          * @return array
 816          */
 817         public static function getSuggestedDurations( $lang = null ) {
 818                 $a = array();
 819                 $msg = $lang === null
 820                         ? wfMessage( 'ipboptions' )->inContentLanguage()->text()
 821                         : wfMessage( 'ipboptions' )->inLanguage( $lang )->text();
 822
 823                 if ( $msg == '-' ) {
 824                         return array();
 825                 }
 826
 827                 foreach ( explode( ',', $msg ) as $option ) {
 828                         if ( strpos( $option, ':' ) === false ) {
 829                                 $option = "$option:$option";
 830                         }
 831
 832                         list( $show, $value ) = explode( ':', $option );
 833                         $a[$show] = $value;
 834                 }
 835
 836                 return $a;
 837         }
 838
 839         /**
 840          * Convert a submitted expiry time, which may be relative ("2 weeks", etc) or absolute
 841          * ("24 May 2034", etc), into an absolute timestamp we can put into the database.
 842          * @param string $expiry Whatever was typed into the form
 843          * @return string Timestamp or 'infinity'
 844          */
 845         public static function parseExpiryInput( $expiry ) {
 846                 if ( wfIsInfinity( $expiry ) ) {
 847                         $expiry = 'infinity';
 848                 } else {
 849                         $expiry = strtotime( $expiry );
 850
 851                         if ( $expiry < 0 || $expiry === false ) {
 852                                 return false;
 853                         }
 854
 855                         $expiry = wfTimestamp( TS_MW, $expiry );
 856                 }
 857
 858                 return $expiry;
 859         }
 860
 861         /**
 862          * Can we do an email block?
 863          * @param User $user The sysop wanting to make a block
 864          * @return bool
 865          */
 866         public static function canBlockEmail( $user ) {
 867                 global $wgEnableUserEmail, $wgSysopEmailBans;
 868
 869                 return ( $wgEnableUserEmail && $wgSysopEmailBans && $user->isAllowed( 'blockemail' ) );
 870         }
 871
 872         /**
 873          * bug 15810: blocked admins should not be able to block/unblock
 874          * others, and probably shouldn't be able to unblock themselves
 875          * either.
 876          * @param User|int|string $user
 877          * @param User $performer User doing the request
 878          * @return bool|string True or error message key
 879          */
 880         public static function checkUnblockSelf( $user, User $performer ) {
 881                 if ( is_int( $user ) ) {
 882                         $user = User::newFromId( $user );
 883                 } elseif ( is_string( $user ) ) {
 884                         $user = User::newFromName( $user );
 885                 }
 886
 887                 if ( $performer->isBlocked() ) {
 888                         if ( $user instanceof User && $user->getId() == $performer->getId() ) {
 889                                 # User is trying to unblock themselves
 890                                 if ( $performer->isAllowed( 'unblockself' ) ) {
 891                                         return true;
 892                                         # User blocked themselves and is now trying to reverse it
 893                                 } elseif ( $performer->blockedBy() === $performer->getName() ) {
 894                                         return true;
 895                                 } else {
 896                                         return 'ipbnounblockself';
 897                                 }
 898                         } else {
 899                                 # User is trying to block/unblock someone else
 900                                 return 'ipbblocked';
 901                         }
 902                 } else {
 903                         return true;
 904                 }
 905         }
 906
 907         /**
 908          * Return a comma-delimited list of "flags" to be passed to the log
 909          * reader for this block, to provide more information in the logs
 910          * @param array $data From HTMLForm data
 911          * @param int $type Block::TYPE_ constant (USER, RANGE, or IP)
 912          * @return string
 913          */
 914         protected static function blockLogFlags( array $data, $type ) {
 915                 global $wgBlockAllowsUTEdit;
 916                 $flags = array();
 917
 918                 # when blocking a user the option 'anononly' is not available/has no effect
 919                 # -> do not write this into log
 920                 if ( !$data['HardBlock'] && $type != Block::TYPE_USER ) {
 921                         // For grepping: message block-log-flags-anononly
 922                         $flags[] = 'anononly';
 923                 }
 924
 925                 if ( $data['CreateAccount'] ) {
 926                         // For grepping: message block-log-flags-nocreate
 927                         $flags[] = 'nocreate';
 928                 }
 929
 930                 # Same as anononly, this is not displayed when blocking an IP address
 931                 if ( !$data['AutoBlock'] && $type == Block::TYPE_USER ) {
 932                         // For grepping: message block-log-flags-noautoblock
 933                         $flags[] = 'noautoblock';
 934                 }
 935
 936                 if ( $data['DisableEmail'] ) {
 937                         // For grepping: message block-log-flags-noemail
 938                         $flags[] = 'noemail';
 939                 }
 940
 941                 if ( $wgBlockAllowsUTEdit && $data['DisableUTEdit'] ) {
 942                         // For grepping: message block-log-flags-nousertalk
 943                         $flags[] = 'nousertalk';
 944                 }
 945
 946                 if ( $data['HideUser'] ) {
 947                         // For grepping: message block-log-flags-hiddenname
 948                         $flags[] = 'hiddenname';
 949                 }
 950
 951                 return implode( ',', $flags );
 952         }
 953
 954         /**
 955          * Process the form on POST submission.
 956          * @param array $data
 957          * @param HTMLForm $form
 958          * @return bool|array True for success, false for didn't-try, array of errors on failure
 959          */
 960         public function onSubmit( array $data, HTMLForm $form = null ) {
 961                 return self::processForm( $data, $form->getContext() );
 962         }
 963
 964         /**
 965          * Do something exciting on successful processing of the form, most likely to show a
 966          * confirmation message
 967          */
 968         public function onSuccess() {
 969                 $out = $this->getOutput();
 970                 $out->setPageTitle( $this->msg( 'blockipsuccesssub' ) );
 971                 $out->addWikiMsg( 'blockipsuccesstext', wfEscapeWikiText( $this->target ) );
 972         }
 973
 974         protected function getGroupName() {
 975                 return 'users';
 976         }
 977 }