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                 global $wgUser, $wgOut, $wgRequest;
  60
  61                 # Permission check
  62                 if( !$this->userCanExecute( $wgUser ) ) {
  63                         $this->displayRestrictionError();
  64                         return;
  65                 }
  66
  67                 # Can't block when the database is locked
  68                 if( wfReadOnly() ) {
  69                         throw new ReadOnlyError;
  70                 }
  71
  72                 # Extract variables from the request.  Try not to get into a situation where we
  73                 # need to extract *every* variable from the form just for processing here, but
  74                 # there are legitimate uses for some variables
  75                 list( $this->target, $this->type ) = self::getTargetAndType( $par, $wgRequest );
  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( $wgRequest->getVal( 'wpPreviousTarget' ) );
  83                 $this->requestedHideUser = $wgRequest->getBool( 'wpHideUser' );
  84
  85                 # bug 15810: blocked admins should have limited access here
  86                 $status = self::checkUnblockSelf( $this->target );
  87                 if ( $status !== true ) {
  88                         throw new ErrorPageError( 'badaccess', $status );
  89                 }
  90
  91                 $wgOut->setPageTitle( wfMsg( 'blockip-title' ) );
  92                 $wgOut->addModules( 'mediawiki.special', 'mediawiki.special.block' );
  93
  94                 $fields = self::getFormFields();
  95                 $this->maybeAlterFormDefaults( $fields );
  96
  97                 $form = new HTMLForm( $fields, $this->getContext() );
  98                 $form->setWrapperLegend( wfMsg( 'blockip-legend' ) );
  99                 $form->setSubmitCallback( array( __CLASS__, 'processForm' ) );
 100
 101                 $t = $this->alreadyBlocked
 102                         ? wfMsg( 'ipb-change-block' )
 103                         : wfMsg( 'ipbsubmit' );
 104                 $form->setSubmitText( $t );
 105
 106                 $this->doPreText( $form );
 107                 $this->doHeadertext( $form );
 108                 $this->doPostText( $form );
 109
 110                 if( $form->show() ){
 111                         $wgOut->setPageTitle( wfMsg( 'blockipsuccesssub' ) );
 112                         $wgOut->addWikiMsg( 'blockipsuccesstext',  $this->target );
 113                 }
 114         }
 115
 116         /**
 117          * Get the HTMLForm descriptor array for the block form
 118          * @return Array
 119          */
 120         protected static function getFormFields(){
 121                 global $wgUser, $wgBlockAllowsUTEdit;
 122
 123                 $a = array(
 124                         'Target' => array(
 125                                 'type' => 'text',
 126                                 'label-message' => 'ipadressorusername',
 127                                 'tabindex' => '1',
 128                                 'id' => 'mw-bi-target',
 129                                 'size' => '45',
 130                                 'required' => true,
 131                                 'validation-callback' => array( __CLASS__, 'validateTargetField' ),
 132                         ),
 133                         'Expiry' => array(
 134                                 'type' => !count( self::getSuggestedDurations() ) ? 'text' : 'selectorother',
 135                                 'label-message' => 'ipbexpiry',
 136                                 'required' => true,
 137                                 'tabindex' => '2',
 138                                 'options' => self::getSuggestedDurations(),
 139                                 'other' => wfMsg( 'ipbother' ),
 140                         ),
 141                         'Reason' => array(
 142                                 'type' => 'selectandother',
 143                                 'label-message' => 'ipbreason',
 144                                 'options-message' => 'ipbreason-dropdown',
 145                         ),
 146                         'CreateAccount' => array(
 147                                 'type' => 'check',
 148                                 'label-message' => 'ipbcreateaccount',
 149                                 'default' => true,
 150                         ),
 151                 );
 152
 153                 if( self::canBlockEmail( $wgUser ) ) {
 154                         $a['DisableEmail'] = array(
 155                                 'type' => 'check',
 156                                 'label-message' => 'ipbemailban',
 157                         );
 158                 }
 159
 160                 if( $wgBlockAllowsUTEdit ){
 161                         $a['DisableUTEdit'] = array(
 162                                 'type' => 'check',
 163                                 'label-message' => 'ipb-disableusertalk',
 164                                 'default' => false,
 165                         );
 166                 }
 167
 168                 $a['AutoBlock'] = array(
 169                         'type' => 'check',
 170                         'label-message' => 'ipbenableautoblock',
 171                         'default' => true,
 172                 );
 173
 174                 # Allow some users to hide name from block log, blocklist and listusers
 175                 if( $wgUser->isAllowed( 'hideuser' ) ) {
 176                         $a['HideUser'] = array(
 177                                 'type' => 'check',
 178                                 'label-message' => 'ipbhidename',
 179                                 'cssclass' => 'mw-block-hideuser',
 180                         );
 181                 }
 182
 183                 # Watchlist their user page? (Only if user is logged in)
 184                 if( $wgUser->isLoggedIn() ) {
 185                         $a['Watch'] = array(
 186                                 'type' => 'check',
 187                                 'label-message' => 'ipbwatchuser',
 188                         );
 189                 }
 190
 191                 $a['HardBlock'] = array(
 192                         'type' => 'check',
 193                         'label-message' => 'ipb-hardblock',
 194                         'default' => false,
 195                 );
 196
 197                 # This is basically a copy of the Target field, but the user can't change it, so we
 198                 # can see if the warnings we maybe showed to the user before still apply
 199                 $a['PreviousTarget'] = array(
 200                         'type' => 'hidden',
 201                         'default' => false,
 202                 );
 203
 204                 # We'll turn this into a checkbox if we need to
 205                 $a['Confirm'] = array(
 206                         'type' => 'hidden',
 207                         'default' => '',
 208                         'label-message' => 'ipb-confirm',
 209                 );
 210
 211                 return $a;
 212         }
 213
 214         /**
 215          * If the user has already been blocked with similar settings, load that block
 216          * and change the defaults for the form fields to match the existing settings.
 217          * @param &$fields Array HTMLForm descriptor array
 218          * @return Bool whether fields were altered (that is, whether the target is
 219          *     already blocked)
 220          */
 221         protected function maybeAlterFormDefaults( &$fields ){
 222                 global $wgRequest, $wgUser;
 223
 224                 # This will be overwritten by request data
 225                 $fields['Target']['default'] = (string)$this->target;
 226
 227                 # This won't be
 228                 $fields['PreviousTarget']['default'] = (string)$this->target;
 229
 230                 $block = Block::newFromTarget( $this->target );
 231
 232                 if( $block instanceof Block && !$block->mAuto # The block exists and isn't an autoblock
 233                         && ( $this->type != Block::TYPE_RANGE # The block isn't a rangeblock
 234                           || $block->getTarget() == $this->target ) # or if it is, the range is what we're about to block
 235                         )
 236                 {
 237                         $fields['HardBlock']['default'] = $block->isHardblock();
 238                         $fields['CreateAccount']['default'] = $block->prevents( 'createaccount' );
 239                         $fields['AutoBlock']['default'] = $block->isAutoblocking();
 240
 241                         if( isset( $fields['DisableEmail'] ) ){
 242                                 $fields['DisableEmail']['default'] = $block->prevents( 'sendemail' );
 243                         }
 244
 245                         if( isset( $fields['HideUser'] ) ){
 246                                 $fields['HideUser']['default'] = $block->mHideName;
 247                         }
 248
 249                         if( isset( $fields['DisableUTEdit'] ) ){
 250                                 $fields['DisableUTEdit']['default'] = $block->prevents( 'editownusertalk' );
 251                         }
 252
 253                         $fields['Reason']['default'] = $block->mReason;
 254
 255                         if( $wgRequest->wasPosted() ){
 256                                 # Ok, so we got a POST submission asking us to reblock a user.  So show the
 257                                 # confirm checkbox; the user will only see it if they haven't previously
 258                                 $fields['Confirm']['type'] = 'check';
 259                         } else {
 260                                 # We got a target, but it wasn't a POST request, so the user must have gone
 261                                 # to a link like [[Special:Block/User]].  We don't need to show the checkbox
 262                                 # as long as they go ahead and block *that* user
 263                                 $fields['Confirm']['default'] = 1;
 264                         }
 265
 266                         if( $block->mExpiry == 'infinity' ) {
 267                                 $fields['Expiry']['default'] = 'indefinite';
 268                         } else {
 269                                 $fields['Expiry']['default'] = wfTimestamp( TS_RFC2822, $block->mExpiry );
 270                         }
 271
 272                         $this->alreadyBlocked = true;
 273                         $this->preErrors[] = array( 'ipb-needreblock', (string)$block->getTarget() );
 274                 }
 275
 276                 # We always need confirmation to do HideUser
 277                 if( $this->requestedHideUser ){
 278                         $fields['Confirm']['type'] = 'check';
 279                         unset( $fields['Confirm']['default'] );
 280                         $this->preErrors[] = 'ipb-confirmhideuser';
 281                 }
 282
 283                 # Or if the user is trying to block themselves
 284                 if( (string)$this->target === $wgUser->getName() ){
 285                         $fields['Confirm']['type'] = 'check';
 286                         unset( $fields['Confirm']['default'] );
 287                         $this->preErrors[] = 'ipb-blockingself';
 288                 }
 289         }
 290
 291         /**
 292          * Add header elements like block log entries, etc.
 293          * @param  $form HTMLForm
 294          * @return void
 295          */
 296         protected function doPreText( HTMLForm &$form ){
 297                 $form->addPreText( wfMsgExt( 'blockiptext', 'parse' ) );
 298
 299                 $otherBlockMessages = array();
 300                 if( $this->target !== null ) {
 301                         # Get other blocks, i.e. from GlobalBlocking or TorBlock extension
 302                         wfRunHooks( 'OtherBlockLogLink', array( &$otherBlockMessages, $this->target ) );
 303
 304                         if( count( $otherBlockMessages ) ) {
 305                                 $s = Html::rawElement(
 306                                         'h2',
 307                                         array(),
 308                                         wfMsgExt( 'ipb-otherblocks-header', 'parseinline', count( $otherBlockMessages ) )
 309                                 ) . "\n";
 310
 311                                 $list = '';
 312
 313                                 foreach( $otherBlockMessages as $link ) {
 314                                         $list .= Html::rawElement( 'li', array(), $link ) . "\n";
 315                                 }
 316
 317                                 $s .= Html::rawElement(
 318                                         'ul',
 319                                         array( 'class' => 'mw-blockip-alreadyblocked' ),
 320                                         $list
 321                                 ) . "\n";
 322
 323                                 $form->addPreText( $s );
 324                         }
 325                 }
 326         }
 327
 328         /**
 329          * Add header text inside the form, just underneath where the errors would go
 330          * @param $form HTMLForm
 331          * @return void
 332          */
 333         protected function doHeaderText( HTMLForm &$form ){
 334                 global $wgRequest;
 335
 336                 # Don't need to do anything if the form has been posted
 337                 if( !$wgRequest->wasPosted() && $this->preErrors ){
 338                         $s = HTMLForm::formatErrors( $this->preErrors );
 339                         if( $s ){
 340                                 $form->addHeaderText( Html::rawElement(
 341                                         'div',
 342                                         array( 'class' => 'error' ),
 343                                         $s
 344                                 ) );
 345                         }
 346                 }
 347         }
 348
 349         /**
 350          * Add footer elements to the form
 351          * @param  $form HTMLForm
 352          * @return void
 353          */
 354         protected function doPostText( HTMLForm &$form ){
 355                 global $wgUser, $wgLang;
 356
 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                 # Link to edit the block dropdown reasons, if applicable
 383                 if ( $wgUser->isAllowed( 'editinterface' ) ) {
 384                         $links[] = Linker::link(
 385                                 Title::makeTitle( NS_MEDIAWIKI, 'Ipbreason-dropdown' ),
 386                                 wfMsgHtml( 'ipb-edit-dropdown' ),
 387                                 array(),
 388                                 array( 'action' => 'edit' )
 389                         );
 390                 }
 391
 392                 $form->addPostText( Html::rawElement(
 393                         'p',
 394                         array( 'class' => 'mw-ipb-conveniencelinks' ),
 395                         $wgLang->pipeList( $links )
 396                 ) );
 397
 398                 if( $this->target instanceof User ){
 399                         # Get relevant extracts from the block and suppression logs, if possible
 400                         $userpage = $this->target->getUserPage();
 401                         $out = '';
 402
 403                         LogEventsList::showLogExtract(
 404                                 $out,
 405                                 'block',
 406                                 $userpage->getPrefixedText(),
 407                                 '',
 408                                 array(
 409                                         'lim' => 10,
 410                                         'msgKey' => array( 'blocklog-showlog', $userpage->getText() ),
 411                                         'showIfEmpty' => false
 412                                 )
 413                         );
 414                         $form->addPostText( $out );
 415
 416                         # Add suppression block entries if allowed
 417                         if( $wgUser->isAllowed( 'suppressionlog' ) ) {
 418                                 LogEventsList::showLogExtract(
 419                                         $out,
 420                                         'suppress',
 421                                         $userpage->getPrefixedText(),
 422                                         '',
 423                                         array(
 424                                                 'lim' => 10,
 425                                                 'conds' => array( 'log_action' => array( 'block', 'reblock', 'unblock' ) ),
 426                                                 'msgKey' => array( 'blocklog-showsuppresslog', $userpage->getText() ),
 427                                                 'showIfEmpty' => false
 428                                         )
 429                                 );
 430
 431                                 $form->addPostText( $out );
 432                         }
 433                 }
 434         }
 435
 436         /**
 437          * Determine the target of the block, and the type of target
 438          * TODO: should be in Block.php?
 439          * @param $par String subpage parameter passed to setup, or data value from
 440          *     the HTMLForm
 441          * @param $request WebRequest optionally try and get data from a request too
 442          * @return array( User|string|null, Block::TYPE_ constant|null )
 443          */
 444         public static function getTargetAndType( $par, WebRequest $request = null ){
 445                 $i = 0;
 446                 $target = null;
 447
 448                 while( true ){
 449                         switch( $i++ ){
 450                                 case 0:
 451                                         # The HTMLForm will check wpTarget first and only if it doesn't get
 452                                         # a value use the default, which will be generated from the options
 453                                         # below; so this has to have a higher precedence here than $par, or
 454                                         # we could end up with different values in $this->target and the HTMLForm!
 455                                         if( $request instanceof WebRequest ){
 456                                                 $target = $request->getText( 'wpTarget', null );
 457                                         }
 458                                         break;
 459                                 case 1:
 460                                         $target = $par;
 461                                         break;
 462                                 case 2:
 463                                         if( $request instanceof WebRequest ){
 464                                                 $target = $request->getText( 'ip', null );
 465                                         }
 466                                         break;
 467                                 case 3:
 468                                         # B/C @since 1.18
 469                                         if( $request instanceof WebRequest ){
 470                                                 $target = $request->getText( 'wpBlockAddress', null );
 471                                         }
 472                                         break;
 473                                 case 4:
 474                                         break 2;
 475                         }
 476
 477                         list( $target, $type ) = Block::parseTarget( $target );
 478
 479                         if( $type !== null ){
 480                                 return array( $target, $type );
 481                         }
 482                 }
 483
 484                 return array( null, null );
 485         }
 486
 487         /**
 488          * HTMLForm field validation-callback for Target field.
 489          * @since 1.18
 490          * @param $value String
 491          * @param $alldata Array
 492          * @return Message
 493          */
 494         public static function validateTargetField( $value, $alldata = null ) {
 495                 global $wgBlockCIDRLimit;
 496
 497                 list( $target, $type ) = self::getTargetAndType( $value );
 498
 499                 if( $type == Block::TYPE_USER ){
 500                         # TODO: why do we not have a User->exists() method?
 501                         if( !$target->getId() ){
 502                                 return wfMessage( 'nosuchusershort',
 503                                         wfEscapeWikiText( $target->getName() ) );
 504                         }
 505
 506                         $status = self::checkUnblockSelf( $target );
 507                         if ( $status !== true ) {
 508                                 return wfMessage( 'badaccess', $status );
 509                         }
 510
 511                 } elseif( $type == Block::TYPE_RANGE ){
 512                         list( $ip, $range ) = explode( '/', $target, 2 );
 513
 514                         if( ( IP::isIPv4( $ip ) && $wgBlockCIDRLimit['IPv4'] == 32 )
 515                                 || ( IP::isIPv6( $ip ) && $wgBlockCIDRLimit['IPV6'] == 128 ) )
 516                         {
 517                                 # Range block effectively disabled
 518                                 return wfMessage( 'range_block_disabled' );
 519                         }
 520
 521                         if( ( IP::isIPv4( $ip ) && $range > 32 )
 522                                 || ( IP::isIPv6( $ip ) && $range > 128 ) )
 523                         {
 524                                 # Dodgy range
 525                                 return wfMessage( 'ip_range_invalid' );
 526                         }
 527
 528                         if( IP::isIPv4( $ip ) && $range < $wgBlockCIDRLimit['IPv4'] ) {
 529                                 return wfMessage( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv4'] );
 530                         }
 531
 532                         if( IP::isIPv6( $ip ) && $range < $wgBlockCIDRLimit['IPv6'] ) {
 533                                 return wfMessage( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv6'] );
 534                         }
 535                 } elseif( $type == Block::TYPE_IP ){
 536                         # All is well
 537                 } else {
 538                         return wfMessage( 'badipaddress' );
 539                 }
 540
 541                 return true;
 542         }
 543
 544         /**
 545          * Given the form data, actually implement a block
 546          * @param  $data Array
 547          * @return Bool|String
 548          */
 549         public static function processForm( array $data ){
 550                 global $wgUser, $wgBlockAllowsUTEdit;
 551
 552                 // Handled by field validator callback
 553                 // self::validateTargetField( $data['Target'] );
 554
 555                 # This might have been a hidden field or a checkbox, so interesting data
 556                 # can come from it
 557                 $data['Confirm'] = !in_array( $data['Confirm'], array( '', '0', null, false ), true );
 558
 559                 list( $target, $type ) = self::getTargetAndType( $data['Target'] );
 560                 if( $type == Block::TYPE_USER ){
 561                         $user = $target;
 562                         $target = $user->getName();
 563                         $userId = $user->getId();
 564
 565                         # Give admins a heads-up before they go and block themselves.  Much messier
 566                         # to do this for IPs, but it's pretty unlikely they'd ever get the 'block'
 567                         # permission anyway, although the code does allow for it
 568                         if( $target === $wgUser->getName() &&
 569                                 ( $data['PreviousTarget'] !== $data['Target'] || !$data['Confirm'] ) )
 570                         {
 571                                 return array( 'ipb-blockingself' );
 572                         }
 573                 } elseif( $type == Block::TYPE_RANGE ){
 574                         $userId = 0;
 575                 } elseif( $type == Block::TYPE_IP ){
 576                         $target = $target->getName();
 577                         $userId = 0;
 578                 } else {
 579                         # This should have been caught in the form field validation
 580                         return array( 'badipaddress' );
 581                 }
 582
 583                 if( ( strlen( $data['Expiry'] ) == 0) || ( strlen( $data['Expiry'] ) > 50 )
 584                         || !self::parseExpiryInput( $data['Expiry'] ) )
 585                 {
 586                         return array( 'ipb_expiry_invalid' );
 587                 }
 588
 589                 if( !isset( $data['DisableEmail'] ) ){
 590                         $data['DisableEmail'] = false;
 591                 }
 592
 593                 # If the user has done the form 'properly', they won't even have been given the
 594                 # option to suppress-block unless they have the 'hideuser' permission
 595                 if( !isset( $data['HideUser'] ) ){
 596                         $data['HideUser'] = false;
 597                 }
 598
 599                 if( $data['HideUser'] ) {
 600                         if( !$wgUser->isAllowed('hideuser') ){
 601                                 # this codepath is unreachable except by a malicious user spoofing forms,
 602                                 # or by race conditions (user has oversight and sysop, loads block form,
 603                                 # and is de-oversighted before submission); so need to fail completely
 604                                 # rather than just silently disable hiding
 605                                 return array( 'badaccess-group0' );
 606                         }
 607
 608                         # Recheck params here...
 609                         if( $type != Block::TYPE_USER ) {
 610                                 $data['HideUser'] = false; # IP users should not be hidden
 611                         } elseif( !in_array( $data['Expiry'], array( 'infinite', 'infinity', 'indefinite' ) ) ) {
 612                                 # Bad expiry.
 613                                 return array( 'ipb_expiry_temp' );
 614                         } elseif( $user->getEditCount() > self::HIDEUSER_CONTRIBLIMIT ) {
 615                                 # Typically, the user should have a handful of edits.
 616                                 # Disallow hiding users with many edits for performance.
 617                                 return array( 'ipb_hide_invalid' );
 618                         } elseif( !$data['Confirm'] ){
 619                                 return array( 'ipb-confirmhideuser' );
 620                         }
 621                 }
 622
 623                 # Create block object.
 624                 $block = new Block();
 625                 $block->setTarget( $target );
 626                 $block->setBlocker( $wgUser );
 627                 $block->mReason = $data['Reason'][0];
 628                 $block->mExpiry = self::parseExpiryInput( $data['Expiry'] );
 629                 $block->prevents( 'createaccount', $data['CreateAccount'] );
 630                 $block->prevents( 'editownusertalk', ( !$wgBlockAllowsUTEdit || $data['DisableUTEdit'] ) );
 631                 $block->prevents( 'sendemail', $data['DisableEmail'] );
 632                 $block->isHardblock( $data['HardBlock'] );
 633                 $block->isAutoblocking( $data['AutoBlock'] );
 634                 $block->mHideName = $data['HideUser'];
 635
 636                 if( !wfRunHooks( 'BlockIp', array( &$block, &$wgUser ) ) ) {
 637                         return array( 'hookaborted' );
 638                 }
 639
 640                 # Try to insert block. Is there a conflicting block?
 641                 $status = $block->insert();
 642                 if( !$status ) {
 643                         # Show form unless the user is already aware of this...
 644                         if( !$data['Confirm'] || ( array_key_exists( 'PreviousTarget', $data )
 645                                 && $data['PreviousTarget'] !== $block->getTarget() ) )
 646                         {
 647                                 return array( array( 'ipb_already_blocked', $block->getTarget() ) );
 648                         # Otherwise, try to update the block...
 649                         } else {
 650                                 # This returns direct blocks before autoblocks/rangeblocks, since we should
 651                                 # be sure the user is blocked by now it should work for our purposes
 652                                 $currentBlock = Block::newFromTarget( $target );
 653
 654                                 if( $block->equals( $currentBlock ) ) {
 655                                         return array( array( 'ipb_already_blocked', $block->getTarget() ) );
 656                                 }
 657
 658                                 # If the name was hidden and the blocking user cannot hide
 659                                 # names, then don't allow any block changes...
 660                                 if( $currentBlock->mHideName && !$wgUser->isAllowed( 'hideuser' ) ) {
 661                                         return array( 'cant-see-hidden-user' );
 662                                 }
 663
 664                                 $currentBlock->delete();
 665                                 $status = $block->insert();
 666                                 $logaction = 'reblock';
 667
 668                                 # Unset _deleted fields if requested
 669                                 if( $currentBlock->mHideName && !$data['HideUser'] ) {
 670                                         RevisionDeleteUser::unsuppressUserName( $target, $userId );
 671                                 }
 672
 673                                 # If hiding/unhiding a name, this should go in the private logs
 674                                 if( (bool)$currentBlock->mHideName ){
 675                                         $data['HideUser'] = true;
 676                                 }
 677                         }
 678                 } else {
 679                         $logaction = 'block';
 680                 }
 681
 682                 wfRunHooks( 'BlockIpComplete', array( $block, $wgUser ) );
 683
 684                 # Set *_deleted fields if requested
 685                 if( $data['HideUser'] ) {
 686                         RevisionDeleteUser::suppressUserName( $target, $userId );
 687                 }
 688
 689                 # Can't watch a rangeblock
 690                 if( $type != Block::TYPE_RANGE && $data['Watch'] ) {
 691                         $wgUser->addWatch( Title::makeTitle( NS_USER, $target ) );
 692                 }
 693
 694                 # Block constructor sanitizes certain block options on insert
 695                 $data['BlockEmail'] = $block->prevents( 'sendemail' );
 696                 $data['AutoBlock'] = $block->isAutoblocking();
 697
 698                 # Prepare log parameters
 699                 $logParams = array();
 700                 $logParams[] = $data['Expiry'];
 701                 $logParams[] = self::blockLogFlags( $data, $type );
 702
 703                 # Make log entry, if the name is hidden, put it in the oversight log
 704                 $log_type = $data['HideUser'] ? 'suppress' : 'block';
 705                 $log = new LogPage( $log_type );
 706                 $log_id = $log->addEntry(
 707                         $logaction,
 708                         Title::makeTitle( NS_USER, $target ),
 709                         $data['Reason'][0],
 710                         $logParams
 711                 );
 712                 # Relate log ID to block IDs (bug 25763)
 713                 $blockIds = array_merge( array( $status['id'] ), $status['autoIds']  );
 714                 $log->addRelations( 'ipb_id', $blockIds, $log_id );
 715
 716                 # Report to the user
 717                 return true;
 718         }
 719
 720         /**
 721          * Get an array of suggested block durations from MediaWiki:Ipboptions
 722          * @todo FIXME: This uses a rather odd syntax for the options, should it be converted
 723          *     to the standard "**<duration>|<displayname>" format?
 724          * @param $lang Language|null the language to get the durations in, or null to use
 725          *     the wiki's content language
 726          * @return Array
 727          */
 728         public static function getSuggestedDurations( $lang = null ){
 729                 $a = array();
 730                 $msg = $lang === null
 731                         ? wfMessage( 'ipboptions' )->inContentLanguage()->text()
 732                         : wfMessage( 'ipboptions' )->inLanguage( $lang )->text();
 733
 734                 if( $msg == '-' ){
 735                         return array();
 736                 }
 737
 738                 foreach( explode( ',', $msg ) as $option ) {
 739                         if( strpos( $option, ':' ) === false ){
 740                                 $option = "$option:$option";
 741                         }
 742
 743                         list( $show, $value ) = explode( ':', $option );
 744                         $a[htmlspecialchars( $show )] = htmlspecialchars( $value );
 745                 }
 746
 747                 return $a;
 748         }
 749
 750         /**
 751          * Convert a submitted expiry time, which may be relative ("2 weeks", etc) or absolute
 752          * ("24 May 2034", etc), into an absolute timestamp we can put into the database.
 753          * @param $expiry String: whatever was typed into the form
 754          * @return String: timestamp or "infinity" string for the DB implementation
 755          */
 756         public static function parseExpiryInput( $expiry ) {
 757                 static $infinity;
 758                 if( $infinity == null ){
 759                         $infinity = wfGetDB( DB_SLAVE )->getInfinity();
 760                 }
 761
 762                 if ( $expiry == 'infinite' || $expiry == 'indefinite' ) {
 763                         $expiry = $infinity;
 764                 } else {
 765                         $expiry = strtotime( $expiry );
 766
 767                         if ( $expiry < 0 || $expiry === false ) {
 768                                 return false;
 769                         }
 770
 771                         $expiry = wfTimestamp( TS_MW, $expiry );
 772                 }
 773
 774                 return $expiry;
 775         }
 776
 777         /**
 778          * Can we do an email block?
 779          * @param $user User: the sysop wanting to make a block
 780          * @return Boolean
 781          */
 782         public static function canBlockEmail( $user ) {
 783                 global $wgEnableUserEmail, $wgSysopEmailBans;
 784
 785                 return ( $wgEnableUserEmail && $wgSysopEmailBans && $user->isAllowed( 'blockemail' ) );
 786         }
 787
 788         /**
 789          * bug 15810: blocked admins should not be able to block/unblock
 790          * others, and probably shouldn't be able to unblock themselves
 791          * either.
 792          * @param $user User|Int|String
 793          * @return Bool|String true or error message key
 794          */
 795         public static function checkUnblockSelf( $user ) {
 796                 global $wgUser;
 797
 798                 if ( is_int( $user ) ) {
 799                         $user = User::newFromId( $user );
 800                 } elseif ( is_string( $user ) ) {
 801                         $user = User::newFromName( $user );
 802                 }
 803
 804                 if( $wgUser->isBlocked() ){
 805                         if( $user instanceof User && $user->getId() == $wgUser->getId() ) {
 806                                 # User is trying to unblock themselves
 807                                 if ( $wgUser->isAllowed( 'unblockself' ) ) {
 808                                         return true;
 809                                 # User blocked themselves and is now trying to reverse it
 810                                 } elseif ( $wgUser->blockedBy() === $wgUser->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
 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                         $flags[] = 'anononly';
 838                 }
 839
 840                 if( $data['CreateAccount'] ){
 841                         $flags[] = 'nocreate';
 842                 }
 843
 844                 # Same as anononly, this is not displayed when blocking an IP address
 845                 if( !$data['AutoBlock'] && $type != Block::TYPE_IP ){
 846                         $flags[] = 'noautoblock';
 847                 }
 848
 849                 if( $data['DisableEmail'] ){
 850                         $flags[] = 'noemail';
 851                 }
 852
 853                 if( $wgBlockAllowsUTEdit && $data['DisableUTEdit'] ){
 854                         $flags[] = 'nousertalk';
 855                 }
 856
 857                 if( $data['HideUser'] ){
 858                         $flags[] = 'hiddenname';
 859                 }
 860
 861                 return implode( ',', $flags );
 862         }
 863 }
 864
 865 # BC @since 1.18
 866 class IPBlockForm extends SpecialBlock {}