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