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