includes/specials/SpecialBlock.php

   1 <?php
   2 /**
   3  * Implements Special:Block
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup SpecialPage
  22  */
  23
  24 /**
  25  * A special page that allows users with 'block' right to block users from
  26  * editing pages and other actions
  27  *
  28  * @ingroup SpecialPage
  29  */
  30 class SpecialBlock extends FormSpecialPage {
  31         /** The maximum number of edits a user can have and still be hidden
  32          * TODO: config setting? */
  33         const HIDEUSER_CONTRIBLIMIT = 1000;
  34
  35         /** @var User user to be blocked, as passed either by parameter (url?wpTarget=Foo)
  36          * or as subpage (Special:Block/Foo) */
  37         protected $target;
  38
  39         /// @var Block::TYPE_ constant
  40         protected $type;
  41
  42         /// @var  User|String the previous block target
  43         protected $previousTarget;
  44
  45         /// @var Bool whether the previous submission of the form asked for HideUser
  46         protected $requestedHideUser;
  47
  48         /// @var Bool
  49         protected $alreadyBlocked;
  50
  51         /// @var Array
  52         protected $preErrors = array();
  53
  54         public function __construct() {
  55                 parent::__construct( 'Block', 'block' );
  56         }
  57
  58         /**
  59          * Checks that the user can unblock themselves if they are trying to do so
  60          *
  61          * @param User $user
  62          * @throws ErrorPageError
  63          */
  64         protected function checkExecutePermissions( User $user ) {
  65                  parent::checkExecutePermissions( $user );
  66
  67                 # bug 15810: blocked admins should have limited access here
  68                 $status = self::checkUnblockSelf( $this->target, $user );
  69                 if ( $status !== true ) {
  70                         throw new ErrorPageError( 'badaccess', $status );
  71                 }
  72         }
  73
  74         /**
  75          * Handle some magic here
  76          *
  77          * @param $par String
  78          */
  79         protected function setParameter( $par ) {
  80                 # Extract variables from the request.  Try not to get into a situation where we
  81                 # need to extract *every* variable from the form just for processing here, but
  82                 # there are legitimate uses for some variables
  83                 $request = $this->getRequest();
  84                 list( $this->target, $this->type ) = self::getTargetAndType( $par, $request );
  85                 if ( $this->target instanceof User ) {
  86                         # Set the 'relevant user' in the skin, so it displays links like Contributions,
  87                         # User logs, UserRights, etc.
  88                         $this->getSkin()->setRelevantUser( $this->target );
  89                 }
  90
  91                 list( $this->previousTarget, /*...*/ ) = Block::parseTarget( $request->getVal( 'wpPreviousTarget' ) );
  92                 $this->requestedHideUser = $request->getBool( 'wpHideUser' );
  93         }
  94
  95         /**
  96          * Customizes the HTMLForm a bit
  97          *
  98          * @param $form HTMLForm
  99          */
 100         protected function alterForm( HTMLForm $form ) {
 101                 $form->setWrapperLegendMsg( 'blockip-legend' );
 102                 $form->setHeaderText( '' );
 103                 $form->setSubmitCallback( array( __CLASS__, 'processUIForm' ) );
 104
 105                 $msg = $this->alreadyBlocked ? 'ipb-change-block' : 'ipbsubmit';
 106                 $form->setSubmitTextMsg( $msg );
 107
 108                 # Don't need to do anything if the form has been posted
 109                 if( !$this->getRequest()->wasPosted() && $this->preErrors ){
 110                         $s = HTMLForm::formatErrors( $this->preErrors );
 111                         if( $s ){
 112                                 $form->addHeaderText( Html::rawElement(
 113                                                 'div',
 114                                                 array( 'class' => 'error' ),
 115                                                 $s
 116                                         ) );
 117                         }
 118                 }
 119         }
 120
 121         /**
 122          * Get the HTMLForm descriptor array for the block form
 123          * @return Array
 124          */
 125         protected function getFormFields(){
 126                 global $wgBlockAllowsUTEdit;
 127
 128                 $user = $this->getUser();
 129
 130                 $a = array(
 131                         'Target' => array(
 132                                 'type' => 'text',
 133                                 'label-message' => 'ipadressorusername',
 134                                 'tabindex' => '1',
 135                                 'id' => 'mw-bi-target',
 136                                 'size' => '45',
 137                                 'required' => true,
 138                                 'validation-callback' => array( __CLASS__, 'validateTargetField' ),
 139                         ),
 140                         'Expiry' => array(
 141                                 'type' => !count( self::getSuggestedDurations() ) ? 'text' : 'selectorother',
 142                                 'label-message' => 'ipbexpiry',
 143                                 'required' => true,
 144                                 'tabindex' => '2',
 145                                 'options' => self::getSuggestedDurations(),
 146                                 'other' => $this->msg( 'ipbother' )->text(),
 147                                 'default' => $this->msg( 'ipb-default-expiry' )->inContentLanguage()->text(),
 148                         ),
 149                         'Reason' => array(
 150                                 'type' => 'selectandother',
 151                                 'label-message' => 'ipbreason',
 152                                 'options-message' => 'ipbreason-dropdown',
 153                         ),
 154                         'CreateAccount' => array(
 155                                 'type' => 'check',
 156                                 'label-message' => 'ipbcreateaccount',
 157                                 'default' => true,
 158                         ),
 159                 );
 160
 161                 if( self::canBlockEmail( $user ) ) {
 162                         $a['DisableEmail'] = array(
 163                                 'type' => 'check',
 164                                 'label-message' => 'ipbemailban',
 165                         );
 166                 }
 167
 168                 if( $wgBlockAllowsUTEdit ){
 169                         $a['DisableUTEdit'] = array(
 170                                 'type' => 'check',
 171                                 'label-message' => 'ipb-disableusertalk',
 172                                 'default' => false,
 173                         );
 174                 }
 175
 176                 $a['AutoBlock'] = array(
 177                         'type' => 'check',
 178                         'label-message' => 'ipbenableautoblock',
 179                         'default' => true,
 180                 );
 181
 182                 # Allow some users to hide name from block log, blocklist and listusers
 183                 if( $user->isAllowed( 'hideuser' ) ) {
 184                         $a['HideUser'] = array(
 185                                 'type' => 'check',
 186                                 'label-message' => 'ipbhidename',
 187                                 'cssclass' => 'mw-block-hideuser',
 188                         );
 189                 }
 190
 191                 # Watchlist their user page? (Only if user is logged in)
 192                 if( $user->isLoggedIn() ) {
 193                         $a['Watch'] = array(
 194                                 'type' => 'check',
 195                                 'label-message' => 'ipbwatchuser',
 196                         );
 197                 }
 198
 199                 $a['HardBlock'] = array(
 200                         'type' => 'check',
 201                         'label-message' => 'ipb-hardblock',
 202                         'default' => false,
 203                 );
 204
 205                 # This is basically a copy of the Target field, but the user can't change it, so we
 206                 # can see if the warnings we maybe showed to the user before still apply
 207                 $a['PreviousTarget'] = array(
 208                         'type' => 'hidden',
 209                         'default' => false,
 210                 );
 211
 212                 # We'll turn this into a checkbox if we need to
 213                 $a['Confirm'] = array(
 214                         'type' => 'hidden',
 215                         'default' => '',
 216                         'label-message' => 'ipb-confirm',
 217                 );
 218
 219                 $this->maybeAlterFormDefaults( $a );
 220
 221                 return $a;
 222         }
 223
 224         /**
 225          * If the user has already been blocked with similar settings, load that block
 226          * and change the defaults for the form fields to match the existing settings.
 227          * @param $fields Array HTMLForm descriptor array
 228          * @return Bool whether fields were altered (that is, whether the target is
 229          *     already blocked)
 230          */
 231         protected function maybeAlterFormDefaults( &$fields ){
 232                 # This will be overwritten by request data
 233                 $fields['Target']['default'] = (string)$this->target;
 234
 235                 # This won't be
 236                 $fields['PreviousTarget']['default'] = (string)$this->target;
 237
 238                 $block = Block::newFromTarget( $this->target );
 239
 240                 if( $block instanceof Block && !$block->mAuto # The block exists and isn't an autoblock
 241                         && ( $this->type != Block::TYPE_RANGE # The block isn't a rangeblock
 242                           || $block->getTarget() == $this->target ) # or if it is, the range is what we're about to block
 243                         )
 244                 {
 245                         $fields['HardBlock']['default'] = $block->isHardblock();
 246                         $fields['CreateAccount']['default'] = $block->prevents( 'createaccount' );
 247                         $fields['AutoBlock']['default'] = $block->isAutoblocking();
 248
 249                         if( isset( $fields['DisableEmail'] ) ){
 250                                 $fields['DisableEmail']['default'] = $block->prevents( 'sendemail' );
 251                         }
 252
 253                         if( isset( $fields['HideUser'] ) ){
 254                                 $fields['HideUser']['default'] = $block->mHideName;
 255                         }
 256
 257                         if( isset( $fields['DisableUTEdit'] ) ){
 258                                 $fields['DisableUTEdit']['default'] = $block->prevents( 'editownusertalk' );
 259                         }
 260
 261                         $fields['Reason']['default'] = $block->mReason;
 262
 263                         if( $this->getRequest()->wasPosted() ){
 264                                 # Ok, so we got a POST submission asking us to reblock a user.  So show the
 265                                 # confirm checkbox; the user will only see it if they haven't previously
 266                                 $fields['Confirm']['type'] = 'check';
 267                         } else {
 268                                 # We got a target, but it wasn't a POST request, so the user must have gone
 269                                 # to a link like [[Special:Block/User]].  We don't need to show the checkbox
 270                                 # as long as they go ahead and block *that* user
 271                                 $fields['Confirm']['default'] = 1;
 272                         }
 273
 274                         if( $block->mExpiry == 'infinity' ) {
 275                                 $fields['Expiry']['default'] = 'infinite';
 276                         } else {
 277                                 $fields['Expiry']['default'] = wfTimestamp( TS_RFC2822, $block->mExpiry );
 278                         }
 279
 280                         $this->alreadyBlocked = true;
 281                         $this->preErrors[] = array( 'ipb-needreblock', wfEscapeWikiText( (string)$block->getTarget() ) );
 282                 }
 283
 284                 # We always need confirmation to do HideUser
 285                 if( $this->requestedHideUser ){
 286                         $fields['Confirm']['type'] = 'check';
 287                         unset( $fields['Confirm']['default'] );
 288                         $this->preErrors[] = 'ipb-confirmhideuser';
 289                 }
 290
 291                 # Or if the user is trying to block themselves
 292                 if( (string)$this->target === $this->getUser()->getName() ){
 293                         $fields['Confirm']['type'] = 'check';
 294                         unset( $fields['Confirm']['default'] );
 295                         $this->preErrors[] = 'ipb-blockingself';
 296                 }
 297         }
 298
 299         /**
 300          * Add header elements like block log entries, etc.
 301          * @return String
 302          */
 303         protected function preText(){
 304                 $text = $this->msg( 'blockiptext' )->parse();
 305
 306                 $otherBlockMessages = array();
 307                 if( $this->target !== null ) {
 308                         # Get other blocks, i.e. from GlobalBlocking or TorBlock extension
 309                         wfRunHooks( 'OtherBlockLogLink', array( &$otherBlockMessages, $this->target ) );
 310
 311                         if( count( $otherBlockMessages ) ) {
 312                                 $s = Html::rawElement(
 313                                         'h2',
 314                                         array(),
 315                                         $this->msg( 'ipb-otherblocks-header', count( $otherBlockMessages ) )->parse()
 316                                 ) . "\n";
 317
 318                                 $list = '';
 319
 320                                 foreach( $otherBlockMessages as $link ) {
 321                                         $list .= Html::rawElement( 'li', array(), $link ) . "\n";
 322                                 }
 323
 324                                 $s .= Html::rawElement(
 325                                         'ul',
 326                                         array( 'class' => 'mw-blockip-alreadyblocked' ),
 327                                         $list
 328                                 ) . "\n";
 329
 330                                 $text .= $s;
 331                         }
 332                 }
 333
 334                 return $text;
 335         }
 336
 337         /**
 338          * Add footer elements to the form
 339          * @return string
 340          */
 341         protected function postText(){
 342                 $links = array();
 343
 344                 # Link to the user's contributions, if applicable
 345                 if( $this->target instanceof User ){
 346                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $this->target->getName() );
 347                         $links[] = Linker::link(
 348                                 $contribsPage,
 349                                 $this->msg( 'ipb-blocklist-contribs', $this->target->getName() )->escaped()
 350                         );
 351                 }
 352
 353                 # Link to unblock the specified user, or to a blank unblock form
 354                 if( $this->target instanceof User ) {
 355                         $message = $this->msg( 'ipb-unblock-addr', wfEscapeWikiText( $this->target->getName() ) )->parse();
 356                         $list = SpecialPage::getTitleFor( 'Unblock', $this->target->getName() );
 357                 } else {
 358                         $message = $this->msg( 'ipb-unblock' )->parse();
 359                         $list = SpecialPage::getTitleFor( 'Unblock' );
 360                 }
 361                 $links[] = Linker::linkKnown( $list, $message, array() );
 362
 363                 # Link to the block list
 364                 $links[] = Linker::linkKnown(
 365                         SpecialPage::getTitleFor( 'BlockList' ),
 366                         $this->msg( 'ipb-blocklist' )->escaped()
 367                 );
 368
 369                 $user = $this->getUser();
 370
 371                 # Link to edit the block dropdown reasons, if applicable
 372                 if ( $user->isAllowed( 'editinterface' ) ) {
 373                         $links[] = Linker::link(
 374                                 Title::makeTitle( NS_MEDIAWIKI, 'Ipbreason-dropdown' ),
 375                                 $this->msg( 'ipb-edit-dropdown' )->escaped(),
 376                                 array(),
 377                                 array( 'action' => 'edit' )
 378                         );
 379                 }
 380
 381                 $text =  Html::rawElement(
 382                         'p',
 383                         array( 'class' => 'mw-ipb-conveniencelinks' ),
 384                         $this->getLanguage()->pipeList( $links )
 385                 );
 386
 387                 $userTitle = self::getTargetUserTitle( $this->target );
 388                 if( $userTitle ){
 389                         # Get relevant extracts from the block and suppression logs, if possible
 390                         $out = '';
 391
 392                         LogEventsList::showLogExtract(
 393                                 $out,
 394                                 'block',
 395                                 $userTitle,
 396                                 '',
 397                                 array(
 398                                         'lim' => 10,
 399                                         'msgKey' => array( 'blocklog-showlog', $userTitle->getText() ),
 400                                         'showIfEmpty' => false
 401                                 )
 402                         );
 403                         $text .= $out;
 404
 405                         # Add suppression block entries if allowed
 406                         if( $user->isAllowed( 'suppressionlog' ) ) {
 407                                 LogEventsList::showLogExtract(
 408                                         $out,
 409                                         'suppress',
 410                                         $userTitle,
 411                                         '',
 412                                         array(
 413                                                 'lim' => 10,
 414                                                 'conds' => array( 'log_action' => array( 'block', 'reblock', 'unblock' ) ),
 415                                                 'msgKey' => array( 'blocklog-showsuppresslog', $userTitle->getText() ),
 416                                                 'showIfEmpty' => false
 417                                         )
 418                                 );
 419
 420                                 $text .= $out;
 421                         }
 422                 }
 423
 424                 return $text;
 425         }
 426
 427         /**
 428          * Get a user page target for things like logs.
 429          * This handles account and IP range targets.
 430          * @param $target User|string
 431          * @return Title|null
 432          */
 433         protected static function getTargetUserTitle( $target ) {
 434                 if( $target instanceof User ) {
 435                         return $target->getUserPage();
 436                 } elseif ( IP::isIPAddress( $target ) ) {
 437                         return Title::makeTitleSafe( NS_USER, $target );
 438                 }
 439                 return null;
 440         }
 441
 442         /**
 443          * Determine the target of the block, and the type of target
 444          * TODO: should be in Block.php?
 445          * @param $par String subpage parameter passed to setup, or data value from
 446          *     the HTMLForm
 447          * @param $request WebRequest optionally try and get data from a request too
 448          * @return array( User|string|null, Block::TYPE_ constant|null )
 449          */
 450         public static function getTargetAndType( $par, WebRequest $request = null ){
 451                 $i = 0;
 452                 $target = null;
 453
 454                 while( true ){
 455                         switch( $i++ ){
 456                                 case 0:
 457                                         # The HTMLForm will check wpTarget first and only if it doesn't get
 458                                         # a value use the default, which will be generated from the options
 459                                         # below; so this has to have a higher precedence here than $par, or
 460                                         # we could end up with different values in $this->target and the HTMLForm!
 461                                         if( $request instanceof WebRequest ){
 462                                                 $target = $request->getText( 'wpTarget', null );
 463                                         }
 464                                         break;
 465                                 case 1:
 466                                         $target = $par;
 467                                         break;
 468                                 case 2:
 469                                         if( $request instanceof WebRequest ){
 470                                                 $target = $request->getText( 'ip', null );
 471                                         }
 472                                         break;
 473                                 case 3:
 474                                         # B/C @since 1.18
 475                                         if( $request instanceof WebRequest ){
 476                                                 $target = $request->getText( 'wpBlockAddress', null );
 477                                         }
 478                                         break;
 479                                 case 4:
 480                                         break 2;
 481                         }
 482
 483                         list( $target, $type ) = Block::parseTarget( $target );
 484
 485                         if( $type !== null ){
 486                                 return array( $target, $type );
 487                         }
 488                 }
 489
 490                 return array( null, null );
 491         }
 492
 493         /**
 494          * HTMLForm field validation-callback for Target field.
 495          * @since 1.18
 496          * @param $value String
 497          * @param $alldata Array
 498          * @param $form HTMLForm
 499          * @return Message
 500          */
 501         public static function validateTargetField( $value, $alldata, $form ) {
 502                 global $wgBlockCIDRLimit;
 503
 504                 list( $target, $type ) = self::getTargetAndType( $value );
 505
 506                 if( $type == Block::TYPE_USER ){
 507                         # TODO: why do we not have a User->exists() method?
 508                         if( !$target->getId() ){
 509                                 return $form->msg( 'nosuchusershort',
 510                                         wfEscapeWikiText( $target->getName() ) );
 511                         }
 512
 513                         $status = self::checkUnblockSelf( $target, $form->getUser() );
 514                         if ( $status !== true ) {
 515                                 return $form->msg( 'badaccess', $status );
 516                         }
 517
 518                 } elseif( $type == Block::TYPE_RANGE ){
 519                         list( $ip, $range ) = explode( '/', $target, 2 );
 520
 521                         if( ( IP::isIPv4( $ip ) && $wgBlockCIDRLimit['IPv4'] == 32 )
 522                                 || ( IP::isIPv6( $ip ) && $wgBlockCIDRLimit['IPv6'] == 128 ) )
 523                         {
 524                                 # Range block effectively disabled
 525                                 return $form->msg( 'range_block_disabled' );
 526                         }
 527
 528                         if( ( IP::isIPv4( $ip ) && $range > 32 )
 529                                 || ( IP::isIPv6( $ip ) && $range > 128 ) )
 530                         {
 531                                 # Dodgy range
 532                                 return $form->msg( 'ip_range_invalid' );
 533                         }
 534
 535                         if( IP::isIPv4( $ip ) && $range < $wgBlockCIDRLimit['IPv4'] ) {
 536                                 return $form->msg( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv4'] );
 537                         }
 538
 539                         if( IP::isIPv6( $ip ) && $range < $wgBlockCIDRLimit['IPv6'] ) {
 540                                 return $form->msg( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv6'] );
 541                         }
 542                 } elseif( $type == Block::TYPE_IP ){
 543                         # All is well
 544                 } else {
 545                         return $form->msg( 'badipaddress' );
 546                 }
 547
 548                 return true;
 549         }
 550
 551         /**
 552          * Submit callback for an HTMLForm object, will simply pass
 553          * @param $data array
 554          * @param $form HTMLForm
 555          * @return Bool|String
 556          */
 557         public static function processUIForm( array $data, HTMLForm $form ) {
 558                 return self::processForm( $data, $form->getContext() );
 559         }
 560
 561         /**
 562          * Given the form data, actually implement a block
 563          * @param  $data Array
 564          * @param  $context IContextSource
 565          * @return Bool|String
 566          */
 567         public static function processForm( array $data, IContextSource $context ){
 568                 global $wgBlockAllowsUTEdit;
 569
 570                 $performer = $context->getUser();
 571
 572                 // Handled by field validator callback
 573                 // self::validateTargetField( $data['Target'] );
 574
 575                 # This might have been a hidden field or a checkbox, so interesting data
 576                 # can come from it
 577                 $data['Confirm'] = !in_array( $data['Confirm'], array( '', '0', null, false ), true );
 578
 579                 list( $target, $type ) = self::getTargetAndType( $data['Target'] );
 580                 if( $type == Block::TYPE_USER ){
 581                         $user = $target;
 582                         $target = $user->getName();
 583                         $userId = $user->getId();
 584
 585                         # Give admins a heads-up before they go and block themselves.  Much messier
 586                         # to do this for IPs, but it's pretty unlikely they'd ever get the 'block'
 587                         # permission anyway, although the code does allow for it.
 588                         # Note: Important to use $target instead of $data['Target']
 589                         # since both $data['PreviousTarget'] and $target are normalized
 590                         # but $data['target'] gets overriden by (non-normalized) request variable
 591                         # from previous request.
 592                         if( $target === $performer->getName() &&
 593                                 ( $data['PreviousTarget'] !== $target || !$data['Confirm'] ) )
 594                         {
 595                                 return array( 'ipb-blockingself' );
 596                         }
 597                 } elseif( $type == Block::TYPE_RANGE ){
 598                         $userId = 0;
 599                 } elseif( $type == Block::TYPE_IP ){
 600                         $target = $target->getName();
 601                         $userId = 0;
 602                 } else {
 603                         # This should have been caught in the form field validation
 604                         return array( 'badipaddress' );
 605                 }
 606
 607                 if( ( strlen( $data['Expiry'] ) == 0) || ( strlen( $data['Expiry'] ) > 50 )
 608                         || !self::parseExpiryInput( $data['Expiry'] ) )
 609                 {
 610                         return array( 'ipb_expiry_invalid' );
 611                 }
 612
 613                 if( !isset( $data['DisableEmail'] ) ){
 614                         $data['DisableEmail'] = false;
 615                 }
 616
 617                 # If the user has done the form 'properly', they won't even have been given the
 618                 # option to suppress-block unless they have the 'hideuser' permission
 619                 if( !isset( $data['HideUser'] ) ){
 620                         $data['HideUser'] = false;
 621                 }
 622
 623                 if( $data['HideUser'] ) {
 624                         if( !$performer->isAllowed('hideuser') ){
 625                                 # this codepath is unreachable except by a malicious user spoofing forms,
 626                                 # or by race conditions (user has oversight and sysop, loads block form,
 627                                 # and is de-oversighted before submission); so need to fail completely
 628                                 # rather than just silently disable hiding
 629                                 return array( 'badaccess-group0' );
 630                         }
 631
 632                         # Recheck params here...
 633                         if( $type != Block::TYPE_USER ) {
 634                                 $data['HideUser'] = false; # IP users should not be hidden
 635                         } elseif( !in_array( $data['Expiry'], array( 'infinite', 'infinity', 'indefinite' ) ) ) {
 636                                 # Bad expiry.
 637                                 return array( 'ipb_expiry_temp' );
 638                         } elseif( $user->getEditCount() > self::HIDEUSER_CONTRIBLIMIT ) {
 639                                 # Typically, the user should have a handful of edits.
 640                                 # Disallow hiding users with many edits for performance.
 641                                 return array( 'ipb_hide_invalid' );
 642                         } elseif( !$data['Confirm'] ){
 643                                 return array( 'ipb-confirmhideuser' );
 644                         }
 645                 }
 646
 647                 # Create block object.
 648                 $block = new Block();
 649                 $block->setTarget( $target );
 650                 $block->setBlocker( $performer );
 651                 $block->mReason = $data['Reason'][0];
 652                 $block->mExpiry = self::parseExpiryInput( $data['Expiry'] );
 653                 $block->prevents( 'createaccount', $data['CreateAccount'] );
 654                 $block->prevents( 'editownusertalk', ( !$wgBlockAllowsUTEdit || $data['DisableUTEdit'] ) );
 655                 $block->prevents( 'sendemail', $data['DisableEmail'] );
 656                 $block->isHardblock( $data['HardBlock'] );
 657                 $block->isAutoblocking( $data['AutoBlock'] );
 658                 $block->mHideName = $data['HideUser'];
 659
 660                 if( !wfRunHooks( 'BlockIp', array( &$block, &$performer ) ) ) {
 661                         return array( 'hookaborted' );
 662                 }
 663
 664                 # Try to insert block. Is there a conflicting block?
 665                 $status = $block->insert();
 666                 if( !$status ) {
 667                         # Show form unless the user is already aware of this...
 668                         if( !$data['Confirm'] || ( array_key_exists( 'PreviousTarget', $data )
 669                                 && $data['PreviousTarget'] !== $target ) )
 670                         {
 671                                 return array( array( 'ipb_already_blocked', $block->getTarget() ) );
 672                         # Otherwise, try to update the block...
 673                         } else {
 674                                 # This returns direct blocks before autoblocks/rangeblocks, since we should
 675                                 # be sure the user is blocked by now it should work for our purposes
 676                                 $currentBlock = Block::newFromTarget( $target );
 677
 678                                 if( $block->equals( $currentBlock ) ) {
 679                                         return array( array( 'ipb_already_blocked', $block->getTarget() ) );
 680                                 }
 681
 682                                 # If the name was hidden and the blocking user cannot hide
 683                                 # names, then don't allow any block changes...
 684                                 if( $currentBlock->mHideName && !$performer->isAllowed( 'hideuser' ) ) {
 685                                         return array( 'cant-see-hidden-user' );
 686                                 }
 687
 688                                 $currentBlock->delete();
 689                                 $status = $block->insert();
 690                                 $logaction = 'reblock';
 691
 692                                 # Unset _deleted fields if requested
 693                                 if( $currentBlock->mHideName && !$data['HideUser'] ) {
 694                                         RevisionDeleteUser::unsuppressUserName( $target, $userId );
 695                                 }
 696
 697                                 # If hiding/unhiding a name, this should go in the private logs
 698                                 if( (bool)$currentBlock->mHideName ){
 699                                         $data['HideUser'] = true;
 700                                 }
 701                         }
 702                 } else {
 703                         $logaction = 'block';
 704                 }
 705
 706                 wfRunHooks( 'BlockIpComplete', array( $block, $performer ) );
 707
 708                 # Set *_deleted fields if requested
 709                 if( $data['HideUser'] ) {
 710                         RevisionDeleteUser::suppressUserName( $target, $userId );
 711                 }
 712
 713                 # Can't watch a rangeblock
 714                 if( $type != Block::TYPE_RANGE && $data['Watch'] ) {
 715                         $performer->addWatch( Title::makeTitle( NS_USER, $target ) );
 716                 }
 717
 718                 # Block constructor sanitizes certain block options on insert
 719                 $data['BlockEmail'] = $block->prevents( 'sendemail' );
 720                 $data['AutoBlock'] = $block->isAutoblocking();
 721
 722                 # Prepare log parameters
 723                 $logParams = array();
 724                 $logParams[] = $data['Expiry'];
 725                 $logParams[] = self::blockLogFlags( $data, $type );
 726
 727                 # Make log entry, if the name is hidden, put it in the oversight log
 728                 $log_type = $data['HideUser'] ? 'suppress' : 'block';
 729                 $log = new LogPage( $log_type );
 730                 $log_id = $log->addEntry(
 731                         $logaction,
 732                         Title::makeTitle( NS_USER, $target ),
 733                         $data['Reason'][0],
 734                         $logParams
 735                 );
 736                 # Relate log ID to block IDs (bug 25763)
 737                 $blockIds = array_merge( array( $status['id'] ), $status['autoIds']  );
 738                 $log->addRelations( 'ipb_id', $blockIds, $log_id );
 739
 740                 # Report to the user
 741                 return true;
 742         }
 743
 744         /**
 745          * Get an array of suggested block durations from MediaWiki:Ipboptions
 746          * @todo FIXME: This uses a rather odd syntax for the options, should it be converted
 747          *     to the standard "**<duration>|<displayname>" format?
 748          * @param $lang Language|null the language to get the durations in, or null to use
 749          *     the wiki's content language
 750          * @return Array
 751          */
 752         public static function getSuggestedDurations( $lang = null ){
 753                 $a = array();
 754                 $msg = $lang === null
 755                         ? wfMessage( 'ipboptions' )->inContentLanguage()->text()
 756                         : wfMessage( 'ipboptions' )->inLanguage( $lang )->text();
 757
 758                 if( $msg == '-' ){
 759                         return array();
 760                 }
 761
 762                 foreach( explode( ',', $msg ) as $option ) {
 763                         if( strpos( $option, ':' ) === false ){
 764                                 $option = "$option:$option";
 765                         }
 766
 767                         list( $show, $value ) = explode( ':', $option );
 768                         $a[htmlspecialchars( $show )] = htmlspecialchars( $value );
 769                 }
 770
 771                 return $a;
 772         }
 773
 774         /**
 775          * Convert a submitted expiry time, which may be relative ("2 weeks", etc) or absolute
 776          * ("24 May 2034", etc), into an absolute timestamp we can put into the database.
 777          * @param $expiry String: whatever was typed into the form
 778          * @return String: timestamp or "infinity" string for the DB implementation
 779          */
 780         public static function parseExpiryInput( $expiry ) {
 781                 static $infinity;
 782                 if( $infinity == null ){
 783                         $infinity = wfGetDB( DB_SLAVE )->getInfinity();
 784                 }
 785
 786                 if ( $expiry == 'infinite' || $expiry == 'indefinite' ) {
 787                         $expiry = $infinity;
 788                 } else {
 789                         $expiry = strtotime( $expiry );
 790
 791                         if ( $expiry < 0 || $expiry === false ) {
 792                                 return false;
 793                         }
 794
 795                         $expiry = wfTimestamp( TS_MW, $expiry );
 796                 }
 797
 798                 return $expiry;
 799         }
 800
 801         /**
 802          * Can we do an email block?
 803          * @param $user User: the sysop wanting to make a block
 804          * @return Boolean
 805          */
 806         public static function canBlockEmail( $user ) {
 807                 global $wgEnableUserEmail, $wgSysopEmailBans;
 808
 809                 return ( $wgEnableUserEmail && $wgSysopEmailBans && $user->isAllowed( 'blockemail' ) );
 810         }
 811
 812         /**
 813          * bug 15810: blocked admins should not be able to block/unblock
 814          * others, and probably shouldn't be able to unblock themselves
 815          * either.
 816          * @param $user User|Int|String
 817          * @param $performer User user doing the request
 818          * @return Bool|String true or error message key
 819          */
 820         public static function checkUnblockSelf( $user, User $performer ) {
 821                 if ( is_int( $user ) ) {
 822                         $user = User::newFromId( $user );
 823                 } elseif ( is_string( $user ) ) {
 824                         $user = User::newFromName( $user );
 825                 }
 826
 827                 if( $performer->isBlocked() ){
 828                         if( $user instanceof User && $user->getId() == $performer->getId() ) {
 829                                 # User is trying to unblock themselves
 830                                 if ( $performer->isAllowed( 'unblockself' ) ) {
 831                                         return true;
 832                                 # User blocked themselves and is now trying to reverse it
 833                                 } elseif ( $performer->blockedBy() === $performer->getName() ) {
 834                                         return true;
 835                                 } else {
 836                                         return 'ipbnounblockself';
 837                                 }
 838                         } else {
 839                                 # User is trying to block/unblock someone else
 840                                 return 'ipbblocked';
 841                         }
 842                 } else {
 843                         return true;
 844                 }
 845         }
 846
 847         /**
 848          * Return a comma-delimited list of "flags" to be passed to the log
 849          * reader for this block, to provide more information in the logs
 850          * @param $data Array from HTMLForm data
 851          * @param $type Block::TYPE_ constant (USER, RANGE, or IP)
 852          * @return array
 853          */
 854         protected static function blockLogFlags( array $data, $type ) {
 855                 global $wgBlockAllowsUTEdit;
 856                 $flags = array();
 857
 858                 # when blocking a user the option 'anononly' is not available/has no effect -> do not write this into log
 859                 if( !$data['HardBlock'] && $type != Block::TYPE_USER ){
 860                         // For grepping: message block-log-flags-anononly
 861                         $flags[] = 'anononly';
 862                 }
 863
 864                 if( $data['CreateAccount'] ){
 865                         // For grepping: message block-log-flags-nocreate
 866                         $flags[] = 'nocreate';
 867                 }
 868
 869                 # Same as anononly, this is not displayed when blocking an IP address
 870                 if( !$data['AutoBlock'] && $type == Block::TYPE_USER ){
 871                         // For grepping: message block-log-flags-noautoblock
 872                         $flags[] = 'noautoblock';
 873                 }
 874
 875                 if( $data['DisableEmail'] ){
 876                         // For grepping: message block-log-flags-noemail
 877                         $flags[] = 'noemail';
 878                 }
 879
 880                 if( $wgBlockAllowsUTEdit && $data['DisableUTEdit'] ){
 881                         // For grepping: message block-log-flags-nousertalk
 882                         $flags[] = 'nousertalk';
 883                 }
 884
 885                 if( $data['HideUser'] ){
 886                         // For grepping: message block-log-flags-hiddenname
 887                         $flags[] = 'hiddenname';
 888                 }
 889
 890                 return implode( ',', $flags );
 891         }
 892
 893         /**
 894          * Process the form on POST submission.
 895          * @param  $data Array
 896          * @return Bool|Array true for success, false for didn't-try, array of errors on failure
 897          */
 898         public function onSubmit( array $data ) {
 899                 // This isn't used since we need that HTMLForm that's passed in the
 900                 // second parameter. See alterForm for the real function
 901         }
 902
 903         /**
 904          * Do something exciting on successful processing of the form, most likely to show a
 905          * confirmation message
 906          */
 907         public function onSuccess() {
 908                 $out = $this->getOutput();
 909                 $out->setPageTitle( $this->msg( 'blockipsuccesssub' ) );
 910                 $out->addWikiMsg( 'blockipsuccesstext', wfEscapeWikiText( $this->target ) );
 911         }
 912 }
 913
 914 # BC @since 1.18
 915 class IPBlockForm extends SpecialBlock {}