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( $par ) {
  59                 # Permission check
  60                 if( !$this->userCanExecute( $this->getUser() ) ) {
  61                         $this->displayRestrictionError();
  62                         return;
  63                 }
  64
  65                 # Can't block when the database is locked
  66                 if( wfReadOnly() ) {
  67                         throw new ReadOnlyError;
  68                 }
  69
  70                 # Extract variables from the request.  Try not to get into a situation where we
  71                 # need to extract *every* variable from the form just for processing here, but
  72                 # there are legitimate uses for some variables
  73                 $request = $this->getRequest();
  74                 list( $this->target, $this->type ) = self::getTargetAndType( $par, $request );
  75                 if ( $this->target instanceof User ) {
  76                         # Set the 'relevant user' in the skin, so it displays links like Contributions,
  77                         # User logs, UserRights, etc.
  78                         $this->getSkin()->setRelevantUser( $this->target );
  79                 }
  80
  81                 list( $this->previousTarget, /*...*/ ) = Block::parseTarget( $request->getVal( 'wpPreviousTarget' ) );
  82                 $this->requestedHideUser = $request->getBool( 'wpHideUser' );
  83
  84                 # bug 15810: blocked admins should have limited access here
  85                 $status = self::checkUnblockSelf( $this->target );
  86                 if ( $status !== true ) {
  87                         throw new ErrorPageError( 'badaccess', $status );
  88                 }
  89
  90                 $this->setHeaders();
  91                 $this->outputHeader();
  92
  93                 $out = $this->getOutput();
  94                 $out->setPageTitle( $this->msg( 'blockip-title' ) );
  95                 $out->addModules( array( 'mediawiki.special', 'mediawiki.special.block' ) );
  96
  97                 $fields = $this->getFormFields();
  98                 $this->maybeAlterFormDefaults( $fields );
  99
 100                 $form = new HTMLForm( $fields, $this->getContext() );
 101                 $form->setWrapperLegend( wfMsg( 'blockip-legend' ) );
 102                 $form->setSubmitCallback( array( __CLASS__, 'processForm' ) );
 103
 104                 $t = $this->alreadyBlocked
 105                         ? wfMsg( 'ipb-change-block' )
 106                         : wfMsg( 'ipbsubmit' );
 107                 $form->setSubmitText( $t );
 108
 109                 $this->doPreText( $form );
 110                 $this->doHeadertext( $form );
 111                 $this->doPostText( $form );
 112
 113                 if( $form->show() ){
 114                         $out->setPageTitle( $this->msg( 'blockipsuccesssub' ) );
 115                         $out->addWikiMsg( 'blockipsuccesstext',  $this->target );
 116                 }
 117         }
 118
 119         /**
 120          * Get the HTMLForm descriptor array for the block form
 121          * @return Array
 122          */
 123         protected function getFormFields(){
 124                 global $wgBlockAllowsUTEdit;
 125
 126                 $user = $this->getUser();
 127
 128                 $a = array(
 129                         'Target' => array(
 130                                 'type' => 'text',
 131                                 'label-message' => 'ipadressorusername',
 132                                 'tabindex' => '1',
 133                                 'id' => 'mw-bi-target',
 134                                 'size' => '45',
 135                                 'required' => true,
 136                                 'validation-callback' => array( __CLASS__, 'validateTargetField' ),
 137                         ),
 138                         'Expiry' => array(
 139                                 'type' => !count( self::getSuggestedDurations() ) ? 'text' : 'selectorother',
 140                                 'label-message' => 'ipbexpiry',
 141                                 'required' => true,
 142                                 'tabindex' => '2',
 143                                 'options' => self::getSuggestedDurations(),
 144                                 'other' => wfMsg( 'ipbother' ),
 145                         ),
 146                         'Reason' => array(
 147                                 'type' => 'selectandother',
 148                                 'label-message' => 'ipbreason',
 149                                 'options-message' => 'ipbreason-dropdown',
 150                         ),
 151                         'CreateAccount' => array(
 152                                 'type' => 'check',
 153                                 'label-message' => 'ipbcreateaccount',
 154                                 'default' => true,
 155                         ),
 156                 );
 157
 158                 if( self::canBlockEmail( $user ) ) {
 159                         $a['DisableEmail'] = array(
 160                                 'type' => 'check',
 161                                 'label-message' => 'ipbemailban',
 162                         );
 163                 }
 164
 165                 if( $wgBlockAllowsUTEdit ){
 166                         $a['DisableUTEdit'] = array(
 167                                 'type' => 'check',
 168                                 'label-message' => 'ipb-disableusertalk',
 169                                 'default' => false,
 170                         );
 171                 }
 172
 173                 $a['AutoBlock'] = array(
 174                         'type' => 'check',
 175                         'label-message' => 'ipbenableautoblock',
 176                         'default' => true,
 177                 );
 178
 179                 # Allow some users to hide name from block log, blocklist and listusers
 180                 if( $user->isAllowed( 'hideuser' ) ) {
 181                         $a['HideUser'] = array(
 182                                 'type' => 'check',
 183                                 'label-message' => 'ipbhidename',
 184                                 'cssclass' => 'mw-block-hideuser',
 185                         );
 186                 }
 187
 188                 # Watchlist their user page? (Only if user is logged in)
 189                 if( $user->isLoggedIn() ) {
 190                         $a['Watch'] = array(
 191                                 'type' => 'check',
 192                                 'label-message' => 'ipbwatchuser',
 193                         );
 194                 }
 195
 196                 $a['HardBlock'] = array(
 197                         'type' => 'check',
 198                         'label-message' => 'ipb-hardblock',
 199                         'default' => false,
 200                 );
 201
 202                 # This is basically a copy of the Target field, but the user can't change it, so we
 203                 # can see if the warnings we maybe showed to the user before still apply
 204                 $a['PreviousTarget'] = array(
 205                         'type' => 'hidden',
 206                         'default' => false,
 207                 );
 208
 209                 # We'll turn this into a checkbox if we need to
 210                 $a['Confirm'] = array(
 211                         'type' => 'hidden',
 212                         'default' => '',
 213                         'label-message' => 'ipb-confirm',
 214                 );
 215
 216                 return $a;
 217         }
 218
 219         /**
 220          * If the user has already been blocked with similar settings, load that block
 221          * and change the defaults for the form fields to match the existing settings.
 222          * @param &$fields Array HTMLForm descriptor array
 223          * @return Bool whether fields were altered (that is, whether the target is
 224          *     already blocked)
 225          */
 226         protected function maybeAlterFormDefaults( &$fields ){
 227                 # This will be overwritten by request data
 228                 $fields['Target']['default'] = (string)$this->target;
 229
 230                 # This won't be
 231                 $fields['PreviousTarget']['default'] = (string)$this->target;
 232
 233                 $block = Block::newFromTarget( $this->target );
 234
 235                 if( $block instanceof Block && !$block->mAuto # The block exists and isn't an autoblock
 236                         && ( $this->type != Block::TYPE_RANGE # The block isn't a rangeblock
 237                           || $block->getTarget() == $this->target ) # or if it is, the range is what we're about to block
 238                         )
 239                 {
 240                         $fields['HardBlock']['default'] = $block->isHardblock();
 241                         $fields['CreateAccount']['default'] = $block->prevents( 'createaccount' );
 242                         $fields['AutoBlock']['default'] = $block->isAutoblocking();
 243
 244                         if( isset( $fields['DisableEmail'] ) ){
 245                                 $fields['DisableEmail']['default'] = $block->prevents( 'sendemail' );
 246                         }
 247
 248                         if( isset( $fields['HideUser'] ) ){
 249                                 $fields['HideUser']['default'] = $block->mHideName;
 250                         }
 251
 252                         if( isset( $fields['DisableUTEdit'] ) ){
 253                                 $fields['DisableUTEdit']['default'] = $block->prevents( 'editownusertalk' );
 254                         }
 255
 256                         $fields['Reason']['default'] = $block->mReason;
 257
 258                         if( $this->getRequest()->wasPosted() ){
 259                                 # Ok, so we got a POST submission asking us to reblock a user.  So show the
 260                                 # confirm checkbox; the user will only see it if they haven't previously
 261                                 $fields['Confirm']['type'] = 'check';
 262                         } else {
 263                                 # We got a target, but it wasn't a POST request, so the user must have gone
 264                                 # to a link like [[Special:Block/User]].  We don't need to show the checkbox
 265                                 # as long as they go ahead and block *that* user
 266                                 $fields['Confirm']['default'] = 1;
 267                         }
 268
 269                         if( $block->mExpiry == 'infinity' ) {
 270                                 $fields['Expiry']['default'] = 'indefinite';
 271                         } else {
 272                                 $fields['Expiry']['default'] = wfTimestamp( TS_RFC2822, $block->mExpiry );
 273                         }
 274
 275                         $this->alreadyBlocked = true;
 276                         $this->preErrors[] = array( 'ipb-needreblock', (string)$block->getTarget() );
 277                 }
 278
 279                 # We always need confirmation to do HideUser
 280                 if( $this->requestedHideUser ){
 281                         $fields['Confirm']['type'] = 'check';
 282                         unset( $fields['Confirm']['default'] );
 283                         $this->preErrors[] = 'ipb-confirmhideuser';
 284                 }
 285
 286                 # Or if the user is trying to block themselves
 287                 if( (string)$this->target === $this->getUser()->getName() ){
 288                         $fields['Confirm']['type'] = 'check';
 289                         unset( $fields['Confirm']['default'] );
 290                         $this->preErrors[] = 'ipb-blockingself';
 291                 }
 292         }
 293
 294         /**
 295          * Add header elements like block log entries, etc.
 296          * @param  $form HTMLForm
 297          * @return void
 298          */
 299         protected function doPreText( HTMLForm &$form ){
 300                 $form->addPreText( wfMsgExt( 'blockiptext', 'parse' ) );
 301
 302                 $otherBlockMessages = array();
 303                 if( $this->target !== null ) {
 304                         # Get other blocks, i.e. from GlobalBlocking or TorBlock extension
 305                         wfRunHooks( 'OtherBlockLogLink', array( &$otherBlockMessages, $this->target ) );
 306
 307                         if( count( $otherBlockMessages ) ) {
 308                                 $s = Html::rawElement(
 309                                         'h2',
 310                                         array(),
 311                                         wfMsgExt( 'ipb-otherblocks-header', 'parseinline', count( $otherBlockMessages ) )
 312                                 ) . "\n";
 313
 314                                 $list = '';
 315
 316                                 foreach( $otherBlockMessages as $link ) {
 317                                         $list .= Html::rawElement( 'li', array(), $link ) . "\n";
 318                                 }
 319
 320                                 $s .= Html::rawElement(
 321                                         'ul',
 322                                         array( 'class' => 'mw-blockip-alreadyblocked' ),
 323                                         $list
 324                                 ) . "\n";
 325
 326                                 $form->addPreText( $s );
 327                         }
 328                 }
 329         }
 330
 331         /**
 332          * Add header text inside the form, just underneath where the errors would go
 333          * @param $form HTMLForm
 334          * @return void
 335          */
 336         protected function doHeaderText( HTMLForm &$form ){
 337                 # Don't need to do anything if the form has been posted
 338                 if( !$this->getRequest()->wasPosted() && $this->preErrors ){
 339                         $s = HTMLForm::formatErrors( $this->preErrors );
 340                         if( $s ){
 341                                 $form->addHeaderText( Html::rawElement(
 342                                         'div',
 343                                         array( 'class' => 'error' ),
 344                                         $s
 345                                 ) );
 346                         }
 347                 }
 348         }
 349
 350         /**
 351          * Add footer elements to the form
 352          * @param  $form HTMLForm
 353          * @return void
 354          */
 355         protected function doPostText( HTMLForm &$form ){
 356                 # Link to the user's contributions, if applicable
 357                 if( $this->target instanceof User ){
 358                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $this->target->getName() );
 359                         $links[] = Linker::link(
 360                                 $contribsPage,
 361                                 wfMsgExt( 'ipb-blocklist-contribs', 'escape', $this->target->getName() )
 362                         );
 363                 }
 364
 365                 # Link to unblock the specified user, or to a blank unblock form
 366                 if( $this->target instanceof User ) {
 367                         $message = wfMsgExt( 'ipb-unblock-addr', array( 'parseinline' ), $this->target->getName() );
 368                         $list = SpecialPage::getTitleFor( 'Unblock', $this->target->getName() );
 369                 } else {
 370                         $message = wfMsgExt( 'ipb-unblock', array( 'parseinline' ) );
 371                         $list = SpecialPage::getTitleFor( 'Unblock' );
 372                 }
 373                 $links[] = Linker::linkKnown( $list, $message, array() );
 374
 375                 # Link to the block list
 376                 $links[] = Linker::linkKnown(
 377                         SpecialPage::getTitleFor( 'BlockList' ),
 378                         wfMsg( 'ipb-blocklist' )
 379                 );
 380
 381                 $user = $this->getUser();
 382
 383                 # Link to edit the block dropdown reasons, if applicable
 384                 if ( $user->isAllowed( 'editinterface' ) ) {
 385                         $links[] = Linker::link(
 386                                 Title::makeTitle( NS_MEDIAWIKI, 'Ipbreason-dropdown' ),
 387                                 wfMsgHtml( 'ipb-edit-dropdown' ),
 388                                 array(),
 389                                 array( 'action' => 'edit' )
 390                         );
 391                 }
 392
 393                 $form->addPostText( Html::rawElement(
 394                         'p',
 395                         array( 'class' => 'mw-ipb-conveniencelinks' ),
 396                         $this->getLang()->pipeList( $links )
 397                 ) );
 398
 399                 if( $this->target instanceof User ){
 400                         # Get relevant extracts from the block and suppression logs, if possible
 401                         $userpage = $this->target->getUserPage();
 402                         $out = '';
 403
 404                         LogEventsList::showLogExtract(
 405                                 $out,
 406                                 'block',
 407                                 $userpage,
 408                                 '',
 409                                 array(
 410                                         'lim' => 10,
 411                                         'msgKey' => array( 'blocklog-showlog', $userpage->getText() ),
 412                                         'showIfEmpty' => false
 413                                 )
 414                         );
 415                         $form->addPostText( $out );
 416
 417                         # Add suppression block entries if allowed
 418                         if( $user->isAllowed( 'suppressionlog' ) ) {
 419                                 LogEventsList::showLogExtract(
 420                                         $out,
 421                                         'suppress',
 422                                         $userpage,
 423                                         '',
 424                                         array(
 425                                                 'lim' => 10,
 426                                                 'conds' => array( 'log_action' => array( 'block', 'reblock', 'unblock' ) ),
 427                                                 'msgKey' => array( 'blocklog-showsuppresslog', $userpage->getText() ),
 428                                                 'showIfEmpty' => false
 429                                         )
 430                                 );
 431
 432                                 $form->addPostText( $out );
 433                         }
 434                 }
 435         }
 436
 437         /**
 438          * Determine the target of the block, and the type of target
 439          * TODO: should be in Block.php?
 440          * @param $par String subpage parameter passed to setup, or data value from
 441          *     the HTMLForm
 442          * @param $request WebRequest optionally try and get data from a request too
 443          * @return array( User|string|null, Block::TYPE_ constant|null )
 444          */
 445         public static function getTargetAndType( $par, WebRequest $request = null ){
 446                 $i = 0;
 447                 $target = null;
 448
 449                 while( true ){
 450                         switch( $i++ ){
 451                                 case 0:
 452                                         # The HTMLForm will check wpTarget first and only if it doesn't get
 453                                         # a value use the default, which will be generated from the options
 454                                         # below; so this has to have a higher precedence here than $par, or
 455                                         # we could end up with different values in $this->target and the HTMLForm!
 456                                         if( $request instanceof WebRequest ){
 457                                                 $target = $request->getText( 'wpTarget', null );
 458                                         }
 459                                         break;
 460                                 case 1:
 461                                         $target = $par;
 462                                         break;
 463                                 case 2:
 464                                         if( $request instanceof WebRequest ){
 465                                                 $target = $request->getText( 'ip', null );
 466                                         }
 467                                         break;
 468                                 case 3:
 469                                         # B/C @since 1.18
 470                                         if( $request instanceof WebRequest ){
 471                                                 $target = $request->getText( 'wpBlockAddress', null );
 472                                         }
 473                                         break;
 474                                 case 4:
 475                                         break 2;
 476                         }
 477
 478                         list( $target, $type ) = Block::parseTarget( $target );
 479
 480                         if( $type !== null ){
 481                                 return array( $target, $type );
 482                         }
 483                 }
 484
 485                 return array( null, null );
 486         }
 487
 488         /**
 489          * HTMLForm field validation-callback for Target field.
 490          * @since 1.18
 491          * @param $value String
 492          * @param $alldata Array
 493          * @return Message
 494          */
 495         public static function validateTargetField( $value, $alldata = null ) {
 496                 global $wgBlockCIDRLimit;
 497
 498                 list( $target, $type ) = self::getTargetAndType( $value );
 499
 500                 if( $type == Block::TYPE_USER ){
 501                         # TODO: why do we not have a User->exists() method?
 502                         if( !$target->getId() ){
 503                                 return wfMessage( 'nosuchusershort',
 504                                         wfEscapeWikiText( $target->getName() ) );
 505                         }
 506
 507                         $status = self::checkUnblockSelf( $target );
 508                         if ( $status !== true ) {
 509                                 return wfMessage( 'badaccess', $status );
 510                         }
 511
 512                 } elseif( $type == Block::TYPE_RANGE ){
 513                         list( $ip, $range ) = explode( '/', $target, 2 );
 514
 515                         if( ( IP::isIPv4( $ip ) && $wgBlockCIDRLimit['IPv4'] == 32 )
 516                                 || ( IP::isIPv6( $ip ) && $wgBlockCIDRLimit['IPv6'] == 128 ) )
 517                         {
 518                                 # Range block effectively disabled
 519                                 return wfMessage( 'range_block_disabled' );
 520                         }
 521
 522                         if( ( IP::isIPv4( $ip ) && $range > 32 )
 523                                 || ( IP::isIPv6( $ip ) && $range > 128 ) )
 524                         {
 525                                 # Dodgy range
 526                                 return wfMessage( 'ip_range_invalid' );
 527                         }
 528
 529                         if( IP::isIPv4( $ip ) && $range < $wgBlockCIDRLimit['IPv4'] ) {
 530                                 return wfMessage( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv4'] );
 531                         }
 532
 533                         if( IP::isIPv6( $ip ) && $range < $wgBlockCIDRLimit['IPv6'] ) {
 534                                 return wfMessage( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv6'] );
 535                         }
 536                 } elseif( $type == Block::TYPE_IP ){
 537                         # All is well
 538                 } else {
 539                         return wfMessage( 'badipaddress' );
 540                 }
 541
 542                 return true;
 543         }
 544
 545         /**
 546          * Given the form data, actually implement a block
 547          * @param  $data Array
 548          * @return Bool|String
 549          */
 550         public static function processForm( array $data ){
 551                 global $wgUser, $wgBlockAllowsUTEdit;
 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 === $wgUser->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( $data['HideUser'] ) {
 601                         if( !$wgUser->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( $wgUser );
 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, &$wgUser ) ) ) {
 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( $currentBlock->mHideName && !$wgUser->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, $wgUser ) );
 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                         $wgUser->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          * @return Bool|String true or error message key
 795          */
 796         public static function checkUnblockSelf( $user ) {
 797                 global $wgUser;
 798
 799                 if ( is_int( $user ) ) {
 800                         $user = User::newFromId( $user );
 801                 } elseif ( is_string( $user ) ) {
 802                         $user = User::newFromName( $user );
 803                 }
 804
 805                 if( $wgUser->isBlocked() ){
 806                         if( $user instanceof User && $user->getId() == $wgUser->getId() ) {
 807                                 # User is trying to unblock themselves
 808                                 if ( $wgUser->isAllowed( 'unblockself' ) ) {
 809                                         return true;
 810                                 # User blocked themselves and is now trying to reverse it
 811                                 } elseif ( $wgUser->blockedBy() === $wgUser->getName() ) {
 812                                         return true;
 813                                 } else {
 814                                         return 'ipbnounblockself';
 815                                 }
 816                         } else {
 817                                 # User is trying to block/unblock someone else
 818                                 return 'ipbblocked';
 819                         }
 820                 } else {
 821                         return true;
 822                 }
 823         }
 824
 825         /**
 826          * Return a comma-delimited list of "flags" to be passed to the log
 827          * reader for this block, to provide more information in the logs
 828          * @param $data Array from HTMLForm data
 829          * @param $type Block::TYPE_ constant (USER, RANGE, or IP)
 830          * @return array
 831          */
 832         protected static function blockLogFlags( array $data, $type ) {
 833                 global $wgBlockAllowsUTEdit;
 834                 $flags = array();
 835
 836                 # when blocking a user the option 'anononly' is not available/has no effect -> do not write this into log
 837                 if( !$data['HardBlock'] && $type != Block::TYPE_USER ){
 838                         // For grepping: message block-log-flags-anononly
 839                         $flags[] = 'anononly';
 840                 }
 841
 842                 if( $data['CreateAccount'] ){
 843                         // For grepping: message block-log-flags-nocreate
 844                         $flags[] = 'nocreate';
 845                 }
 846
 847                 # Same as anononly, this is not displayed when blocking an IP address
 848                 if( !$data['AutoBlock'] && $type == Block::TYPE_USER ){
 849                         // For grepping: message block-log-flags-noautoblock
 850                         $flags[] = 'noautoblock';
 851                 }
 852
 853                 if( $data['DisableEmail'] ){
 854                         // For grepping: message block-log-flags-noemail
 855                         $flags[] = 'noemail';
 856                 }
 857
 858                 if( $wgBlockAllowsUTEdit && $data['DisableUTEdit'] ){
 859                         // For grepping: message block-log-flags-nousertalk
 860                         $flags[] = 'nousertalk';
 861                 }
 862
 863                 if( $data['HideUser'] ){
 864                         // For grepping: message block-log-flags-hiddenname
 865                         $flags[] = 'hiddenname';
 866                 }
 867
 868                 return implode( ',', $flags );
 869         }
 870 }
 871
 872 # BC @since 1.18
 873 class IPBlockForm extends SpecialBlock {}