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                 $out = $this->getOutput();
  91                 $out->setPageTitle( wfMsg( 'blockip-title' ) );
  92                 $out->addModules( 'mediawiki.special', 'mediawiki.special.block' );
  93
  94                 $fields = $this->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                         $out->setPageTitle( wfMsg( 'blockipsuccesssub' ) );
 112                         $out->addWikiMsg( 'blockipsuccesstext',  $this->target );
 113                 }
 114         }
 115
 116         /**
 117          * Get the HTMLForm descriptor array for the block form
 118          * @return Array
 119          */
 120         protected function getFormFields(){
 121                 global $wgBlockAllowsUTEdit;
 122
 123                 $user = $this->getUser();
 124
 125                 $a = array(
 126                         'Target' => array(
 127                                 'type' => 'text',
 128                                 'label-message' => 'ipadressorusername',
 129                                 'tabindex' => '1',
 130                                 'id' => 'mw-bi-target',
 131                                 'size' => '45',
 132                                 'required' => true,
 133                                 'validation-callback' => array( __CLASS__, 'validateTargetField' ),
 134                         ),
 135                         'Expiry' => array(
 136                                 'type' => !count( self::getSuggestedDurations() ) ? 'text' : 'selectorother',
 137                                 'label-message' => 'ipbexpiry',
 138                                 'required' => true,
 139                                 'tabindex' => '2',
 140                                 'options' => self::getSuggestedDurations(),
 141                                 'other' => wfMsg( 'ipbother' ),
 142                         ),
 143                         'Reason' => array(
 144                                 'type' => 'selectandother',
 145                                 'label-message' => 'ipbreason',
 146                                 'options-message' => 'ipbreason-dropdown',
 147                         ),
 148                         'CreateAccount' => array(
 149                                 'type' => 'check',
 150                                 'label-message' => 'ipbcreateaccount',
 151                                 'default' => true,
 152                         ),
 153                 );
 154
 155                 if( self::canBlockEmail( $user ) ) {
 156                         $a['DisableEmail'] = array(
 157                                 'type' => 'check',
 158                                 'label-message' => 'ipbemailban',
 159                         );
 160                 }
 161
 162                 if( $wgBlockAllowsUTEdit ){
 163                         $a['DisableUTEdit'] = array(
 164                                 'type' => 'check',
 165                                 'label-message' => 'ipb-disableusertalk',
 166                                 'default' => false,
 167                         );
 168                 }
 169
 170                 $a['AutoBlock'] = array(
 171                         'type' => 'check',
 172                         'label-message' => 'ipbenableautoblock',
 173                         'default' => true,
 174                 );
 175
 176                 # Allow some users to hide name from block log, blocklist and listusers
 177                 if( $user->isAllowed( 'hideuser' ) ) {
 178                         $a['HideUser'] = array(
 179                                 'type' => 'check',
 180                                 'label-message' => 'ipbhidename',
 181                                 'cssclass' => 'mw-block-hideuser',
 182                         );
 183                 }
 184
 185                 # Watchlist their user page? (Only if user is logged in)
 186                 if( $user->isLoggedIn() ) {
 187                         $a['Watch'] = array(
 188                                 'type' => 'check',
 189                                 'label-message' => 'ipbwatchuser',
 190                         );
 191                 }
 192
 193                 $a['HardBlock'] = array(
 194                         'type' => 'check',
 195                         'label-message' => 'ipb-hardblock',
 196                         'default' => false,
 197                 );
 198
 199                 # This is basically a copy of the Target field, but the user can't change it, so we
 200                 # can see if the warnings we maybe showed to the user before still apply
 201                 $a['PreviousTarget'] = array(
 202                         'type' => 'hidden',
 203                         'default' => false,
 204                 );
 205
 206                 # We'll turn this into a checkbox if we need to
 207                 $a['Confirm'] = array(
 208                         'type' => 'hidden',
 209                         'default' => '',
 210                         'label-message' => 'ipb-confirm',
 211                 );
 212
 213                 return $a;
 214         }
 215
 216         /**
 217          * If the user has already been blocked with similar settings, load that block
 218          * and change the defaults for the form fields to match the existing settings.
 219          * @param &$fields Array HTMLForm descriptor array
 220          * @return Bool whether fields were altered (that is, whether the target is
 221          *     already blocked)
 222          */
 223         protected function maybeAlterFormDefaults( &$fields ){
 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( $this->getRequest()->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 === $this->getUser()->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                 # Don't need to do anything if the form has been posted
 335                 if( !$this->getRequest()->wasPosted() && $this->preErrors ){
 336                         $s = HTMLForm::formatErrors( $this->preErrors );
 337                         if( $s ){
 338                                 $form->addHeaderText( Html::rawElement(
 339                                         'div',
 340                                         array( 'class' => 'error' ),
 341                                         $s
 342                                 ) );
 343                         }
 344                 }
 345         }
 346
 347         /**
 348          * Add footer elements to the form
 349          * @param  $form HTMLForm
 350          * @return void
 351          */
 352         protected function doPostText( HTMLForm &$form ){
 353                 # Link to the user's contributions, if applicable
 354                 if( $this->target instanceof User ){
 355                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $this->target->getName() );
 356                         $links[] = Linker::link(
 357                                 $contribsPage,
 358                                 wfMsgExt( 'ipb-blocklist-contribs', 'escape', $this->target->getName() )
 359                         );
 360                 }
 361
 362                 # Link to unblock the specified user, or to a blank unblock form
 363                 if( $this->target instanceof User ) {
 364                         $message = wfMsgExt( 'ipb-unblock-addr', array( 'parseinline' ), $this->target->getName() );
 365                         $list = SpecialPage::getTitleFor( 'Unblock', $this->target->getName() );
 366                 } else {
 367                         $message = wfMsgExt( 'ipb-unblock', array( 'parseinline' ) );
 368                         $list = SpecialPage::getTitleFor( 'Unblock' );
 369                 }
 370                 $links[] = Linker::linkKnown( $list, $message, array() );
 371
 372                 # Link to the block list
 373                 $links[] = Linker::linkKnown(
 374                         SpecialPage::getTitleFor( 'BlockList' ),
 375                         wfMsg( 'ipb-blocklist' )
 376                 );
 377
 378                 $user = $this->getUser();
 379
 380                 # Link to edit the block dropdown reasons, if applicable
 381                 if ( $user->isAllowed( 'editinterface' ) ) {
 382                         $links[] = Linker::link(
 383                                 Title::makeTitle( NS_MEDIAWIKI, 'Ipbreason-dropdown' ),
 384                                 wfMsgHtml( 'ipb-edit-dropdown' ),
 385                                 array(),
 386                                 array( 'action' => 'edit' )
 387                         );
 388                 }
 389
 390                 $form->addPostText( Html::rawElement(
 391                         'p',
 392                         array( 'class' => 'mw-ipb-conveniencelinks' ),
 393                         $this->getLang()->pipeList( $links )
 394                 ) );
 395
 396                 if( $this->target instanceof User ){
 397                         # Get relevant extracts from the block and suppression logs, if possible
 398                         $userpage = $this->target->getUserPage();
 399                         $out = '';
 400
 401                         LogEventsList::showLogExtract(
 402                                 $out,
 403                                 'block',
 404                                 $userpage->getPrefixedText(),
 405                                 '',
 406                                 array(
 407                                         'lim' => 10,
 408                                         'msgKey' => array( 'blocklog-showlog', $userpage->getText() ),
 409                                         'showIfEmpty' => false
 410                                 )
 411                         );
 412                         $form->addPostText( $out );
 413
 414                         # Add suppression block entries if allowed
 415                         if( $user->isAllowed( 'suppressionlog' ) ) {
 416                                 LogEventsList::showLogExtract(
 417                                         $out,
 418                                         'suppress',
 419                                         $userpage->getPrefixedText(),
 420                                         '',
 421                                         array(
 422                                                 'lim' => 10,
 423                                                 'conds' => array( 'log_action' => array( 'block', 'reblock', 'unblock' ) ),
 424                                                 'msgKey' => array( 'blocklog-showsuppresslog', $userpage->getText() ),
 425                                                 'showIfEmpty' => false
 426                                         )
 427                                 );
 428
 429                                 $form->addPostText( $out );
 430                         }
 431                 }
 432         }
 433
 434         /**
 435          * Determine the target of the block, and the type of target
 436          * TODO: should be in Block.php?
 437          * @param $par String subpage parameter passed to setup, or data value from
 438          *     the HTMLForm
 439          * @param $request WebRequest optionally try and get data from a request too
 440          * @return array( User|string|null, Block::TYPE_ constant|null )
 441          */
 442         public static function getTargetAndType( $par, WebRequest $request = null ){
 443                 $i = 0;
 444                 $target = null;
 445
 446                 while( true ){
 447                         switch( $i++ ){
 448                                 case 0:
 449                                         # The HTMLForm will check wpTarget first and only if it doesn't get
 450                                         # a value use the default, which will be generated from the options
 451                                         # below; so this has to have a higher precedence here than $par, or
 452                                         # we could end up with different values in $this->target and the HTMLForm!
 453                                         if( $request instanceof WebRequest ){
 454                                                 $target = $request->getText( 'wpTarget', null );
 455                                         }
 456                                         break;
 457                                 case 1:
 458                                         $target = $par;
 459                                         break;
 460                                 case 2:
 461                                         if( $request instanceof WebRequest ){
 462                                                 $target = $request->getText( 'ip', null );
 463                                         }
 464                                         break;
 465                                 case 3:
 466                                         # B/C @since 1.18
 467                                         if( $request instanceof WebRequest ){
 468                                                 $target = $request->getText( 'wpBlockAddress', null );
 469                                         }
 470                                         break;
 471                                 case 4:
 472                                         break 2;
 473                         }
 474
 475                         list( $target, $type ) = Block::parseTarget( $target );
 476
 477                         if( $type !== null ){
 478                                 return array( $target, $type );
 479                         }
 480                 }
 481
 482                 return array( null, null );
 483         }
 484
 485         /**
 486          * HTMLForm field validation-callback for Target field.
 487          * @since 1.18
 488          * @param $value String
 489          * @param $alldata Array
 490          * @return Message
 491          */
 492         public static function validateTargetField( $value, $alldata = null ) {
 493                 global $wgBlockCIDRLimit;
 494
 495                 list( $target, $type ) = self::getTargetAndType( $value );
 496
 497                 if( $type == Block::TYPE_USER ){
 498                         # TODO: why do we not have a User->exists() method?
 499                         if( !$target->getId() ){
 500                                 return wfMessage( 'nosuchusershort',
 501                                         wfEscapeWikiText( $target->getName() ) );
 502                         }
 503
 504                         $status = self::checkUnblockSelf( $target );
 505                         if ( $status !== true ) {
 506                                 return wfMessage( 'badaccess', $status );
 507                         }
 508
 509                 } elseif( $type == Block::TYPE_RANGE ){
 510                         list( $ip, $range ) = explode( '/', $target, 2 );
 511
 512                         if( ( IP::isIPv4( $ip ) && $wgBlockCIDRLimit['IPv4'] == 32 )
 513                                 || ( IP::isIPv6( $ip ) && $wgBlockCIDRLimit['IPV6'] == 128 ) )
 514                         {
 515                                 # Range block effectively disabled
 516                                 return wfMessage( 'range_block_disabled' );
 517                         }
 518
 519                         if( ( IP::isIPv4( $ip ) && $range > 32 )
 520                                 || ( IP::isIPv6( $ip ) && $range > 128 ) )
 521                         {
 522                                 # Dodgy range
 523                                 return wfMessage( 'ip_range_invalid' );
 524                         }
 525
 526                         if( IP::isIPv4( $ip ) && $range < $wgBlockCIDRLimit['IPv4'] ) {
 527                                 return wfMessage( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv4'] );
 528                         }
 529
 530                         if( IP::isIPv6( $ip ) && $range < $wgBlockCIDRLimit['IPv6'] ) {
 531                                 return wfMessage( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv6'] );
 532                         }
 533                 } elseif( $type == Block::TYPE_IP ){
 534                         # All is well
 535                 } else {
 536                         return wfMessage( 'badipaddress' );
 537                 }
 538
 539                 return true;
 540         }
 541
 542         /**
 543          * Given the form data, actually implement a block
 544          * @param  $data Array
 545          * @return Bool|String
 546          */
 547         public static function processForm( array $data ){
 548                 global $wgUser, $wgBlockAllowsUTEdit;
 549
 550                 // Handled by field validator callback
 551                 // self::validateTargetField( $data['Target'] );
 552
 553                 # This might have been a hidden field or a checkbox, so interesting data
 554                 # can come from it
 555                 $data['Confirm'] = !in_array( $data['Confirm'], array( '', '0', null, false ), true );
 556
 557                 list( $target, $type ) = self::getTargetAndType( $data['Target'] );
 558                 if( $type == Block::TYPE_USER ){
 559                         $user = $target;
 560                         $target = $user->getName();
 561                         $userId = $user->getId();
 562
 563                         # Give admins a heads-up before they go and block themselves.  Much messier
 564                         # to do this for IPs, but it's pretty unlikely they'd ever get the 'block'
 565                         # permission anyway, although the code does allow for it
 566                         if( $target === $wgUser->getName() &&
 567                                 ( $data['PreviousTarget'] !== $data['Target'] || !$data['Confirm'] ) )
 568                         {
 569                                 return array( 'ipb-blockingself' );
 570                         }
 571                 } elseif( $type == Block::TYPE_RANGE ){
 572                         $userId = 0;
 573                 } elseif( $type == Block::TYPE_IP ){
 574                         $target = $target->getName();
 575                         $userId = 0;
 576                 } else {
 577                         # This should have been caught in the form field validation
 578                         return array( 'badipaddress' );
 579                 }
 580
 581                 if( ( strlen( $data['Expiry'] ) == 0) || ( strlen( $data['Expiry'] ) > 50 )
 582                         || !self::parseExpiryInput( $data['Expiry'] ) )
 583                 {
 584                         return array( 'ipb_expiry_invalid' );
 585                 }
 586
 587                 if( !isset( $data['DisableEmail'] ) ){
 588                         $data['DisableEmail'] = false;
 589                 }
 590
 591                 # If the user has done the form 'properly', they won't even have been given the
 592                 # option to suppress-block unless they have the 'hideuser' permission
 593                 if( !isset( $data['HideUser'] ) ){
 594                         $data['HideUser'] = false;
 595                 }
 596
 597                 if( $data['HideUser'] ) {
 598                         if( !$wgUser->isAllowed('hideuser') ){
 599                                 # this codepath is unreachable except by a malicious user spoofing forms,
 600                                 # or by race conditions (user has oversight and sysop, loads block form,
 601                                 # and is de-oversighted before submission); so need to fail completely
 602                                 # rather than just silently disable hiding
 603                                 return array( 'badaccess-group0' );
 604                         }
 605
 606                         # Recheck params here...
 607                         if( $type != Block::TYPE_USER ) {
 608                                 $data['HideUser'] = false; # IP users should not be hidden
 609                         } elseif( !in_array( $data['Expiry'], array( 'infinite', 'infinity', 'indefinite' ) ) ) {
 610                                 # Bad expiry.
 611                                 return array( 'ipb_expiry_temp' );
 612                         } elseif( $user->getEditCount() > self::HIDEUSER_CONTRIBLIMIT ) {
 613                                 # Typically, the user should have a handful of edits.
 614                                 # Disallow hiding users with many edits for performance.
 615                                 return array( 'ipb_hide_invalid' );
 616                         } elseif( !$data['Confirm'] ){
 617                                 return array( 'ipb-confirmhideuser' );
 618                         }
 619                 }
 620
 621                 # Create block object.
 622                 $block = new Block();
 623                 $block->setTarget( $target );
 624                 $block->setBlocker( $wgUser );
 625                 $block->mReason = $data['Reason'][0];
 626                 $block->mExpiry = self::parseExpiryInput( $data['Expiry'] );
 627                 $block->prevents( 'createaccount', $data['CreateAccount'] );
 628                 $block->prevents( 'editownusertalk', ( !$wgBlockAllowsUTEdit || $data['DisableUTEdit'] ) );
 629                 $block->prevents( 'sendemail', $data['DisableEmail'] );
 630                 $block->isHardblock( $data['HardBlock'] );
 631                 $block->isAutoblocking( $data['AutoBlock'] );
 632                 $block->mHideName = $data['HideUser'];
 633
 634                 if( !wfRunHooks( 'BlockIp', array( &$block, &$wgUser ) ) ) {
 635                         return array( 'hookaborted' );
 636                 }
 637
 638                 # Try to insert block. Is there a conflicting block?
 639                 $status = $block->insert();
 640                 if( !$status ) {
 641                         # Show form unless the user is already aware of this...
 642                         if( !$data['Confirm'] || ( array_key_exists( 'PreviousTarget', $data )
 643                                 && $data['PreviousTarget'] !== $block->getTarget() ) )
 644                         {
 645                                 return array( array( 'ipb_already_blocked', $block->getTarget() ) );
 646                         # Otherwise, try to update the block...
 647                         } else {
 648                                 # This returns direct blocks before autoblocks/rangeblocks, since we should
 649                                 # be sure the user is blocked by now it should work for our purposes
 650                                 $currentBlock = Block::newFromTarget( $target );
 651
 652                                 if( $block->equals( $currentBlock ) ) {
 653                                         return array( array( 'ipb_already_blocked', $block->getTarget() ) );
 654                                 }
 655
 656                                 # If the name was hidden and the blocking user cannot hide
 657                                 # names, then don't allow any block changes...
 658                                 if( $currentBlock->mHideName && !$wgUser->isAllowed( 'hideuser' ) ) {
 659                                         return array( 'cant-see-hidden-user' );
 660                                 }
 661
 662                                 $currentBlock->delete();
 663                                 $status = $block->insert();
 664                                 $logaction = 'reblock';
 665
 666                                 # Unset _deleted fields if requested
 667                                 if( $currentBlock->mHideName && !$data['HideUser'] ) {
 668                                         RevisionDeleteUser::unsuppressUserName( $target, $userId );
 669                                 }
 670
 671                                 # If hiding/unhiding a name, this should go in the private logs
 672                                 if( (bool)$currentBlock->mHideName ){
 673                                         $data['HideUser'] = true;
 674                                 }
 675                         }
 676                 } else {
 677                         $logaction = 'block';
 678                 }
 679
 680                 wfRunHooks( 'BlockIpComplete', array( $block, $wgUser ) );
 681
 682                 # Set *_deleted fields if requested
 683                 if( $data['HideUser'] ) {
 684                         RevisionDeleteUser::suppressUserName( $target, $userId );
 685                 }
 686
 687                 # Can't watch a rangeblock
 688                 if( $type != Block::TYPE_RANGE && $data['Watch'] ) {
 689                         $wgUser->addWatch( Title::makeTitle( NS_USER, $target ) );
 690                 }
 691
 692                 # Block constructor sanitizes certain block options on insert
 693                 $data['BlockEmail'] = $block->prevents( 'sendemail' );
 694                 $data['AutoBlock'] = $block->isAutoblocking();
 695
 696                 # Prepare log parameters
 697                 $logParams = array();
 698                 $logParams[] = $data['Expiry'];
 699                 $logParams[] = self::blockLogFlags( $data, $type );
 700
 701                 # Make log entry, if the name is hidden, put it in the oversight log
 702                 $log_type = $data['HideUser'] ? 'suppress' : 'block';
 703                 $log = new LogPage( $log_type );
 704                 $log_id = $log->addEntry(
 705                         $logaction,
 706                         Title::makeTitle( NS_USER, $target ),
 707                         $data['Reason'][0],
 708                         $logParams
 709                 );
 710                 # Relate log ID to block IDs (bug 25763)
 711                 $blockIds = array_merge( array( $status['id'] ), $status['autoIds']  );
 712                 $log->addRelations( 'ipb_id', $blockIds, $log_id );
 713
 714                 # Report to the user
 715                 return true;
 716         }
 717
 718         /**
 719          * Get an array of suggested block durations from MediaWiki:Ipboptions
 720          * @todo FIXME: This uses a rather odd syntax for the options, should it be converted
 721          *     to the standard "**<duration>|<displayname>" format?
 722          * @param $lang Language|null the language to get the durations in, or null to use
 723          *     the wiki's content language
 724          * @return Array
 725          */
 726         public static function getSuggestedDurations( $lang = null ){
 727                 $a = array();
 728                 $msg = $lang === null
 729                         ? wfMessage( 'ipboptions' )->inContentLanguage()->text()
 730                         : wfMessage( 'ipboptions' )->inLanguage( $lang )->text();
 731
 732                 if( $msg == '-' ){
 733                         return array();
 734                 }
 735
 736                 foreach( explode( ',', $msg ) as $option ) {
 737                         if( strpos( $option, ':' ) === false ){
 738                                 $option = "$option:$option";
 739                         }
 740
 741                         list( $show, $value ) = explode( ':', $option );
 742                         $a[htmlspecialchars( $show )] = htmlspecialchars( $value );
 743                 }
 744
 745                 return $a;
 746         }
 747
 748         /**
 749          * Convert a submitted expiry time, which may be relative ("2 weeks", etc) or absolute
 750          * ("24 May 2034", etc), into an absolute timestamp we can put into the database.
 751          * @param $expiry String: whatever was typed into the form
 752          * @return String: timestamp or "infinity" string for the DB implementation
 753          */
 754         public static function parseExpiryInput( $expiry ) {
 755                 static $infinity;
 756                 if( $infinity == null ){
 757                         $infinity = wfGetDB( DB_SLAVE )->getInfinity();
 758                 }
 759
 760                 if ( $expiry == 'infinite' || $expiry == 'indefinite' ) {
 761                         $expiry = $infinity;
 762                 } else {
 763                         $expiry = strtotime( $expiry );
 764
 765                         if ( $expiry < 0 || $expiry === false ) {
 766                                 return false;
 767                         }
 768
 769                         $expiry = wfTimestamp( TS_MW, $expiry );
 770                 }
 771
 772                 return $expiry;
 773         }
 774
 775         /**
 776          * Can we do an email block?
 777          * @param $user User: the sysop wanting to make a block
 778          * @return Boolean
 779          */
 780         public static function canBlockEmail( $user ) {
 781                 global $wgEnableUserEmail, $wgSysopEmailBans;
 782
 783                 return ( $wgEnableUserEmail && $wgSysopEmailBans && $user->isAllowed( 'blockemail' ) );
 784         }
 785
 786         /**
 787          * bug 15810: blocked admins should not be able to block/unblock
 788          * others, and probably shouldn't be able to unblock themselves
 789          * either.
 790          * @param $user User|Int|String
 791          * @return Bool|String true or error message key
 792          */
 793         public static function checkUnblockSelf( $user ) {
 794                 global $wgUser;
 795
 796                 if ( is_int( $user ) ) {
 797                         $user = User::newFromId( $user );
 798                 } elseif ( is_string( $user ) ) {
 799                         $user = User::newFromName( $user );
 800                 }
 801
 802                 if( $wgUser->isBlocked() ){
 803                         if( $user instanceof User && $user->getId() == $wgUser->getId() ) {
 804                                 # User is trying to unblock themselves
 805                                 if ( $wgUser->isAllowed( 'unblockself' ) ) {
 806                                         return true;
 807                                 # User blocked themselves and is now trying to reverse it
 808                                 } elseif ( $wgUser->blockedBy() === $wgUser->getName() ) {
 809                                         return true;
 810                                 } else {
 811                                         return 'ipbnounblockself';
 812                                 }
 813                         } else {
 814                                 # User is trying to block/unblock someone else
 815                                 return 'ipbblocked';
 816                         }
 817                 } else {
 818                         return true;
 819                 }
 820         }
 821
 822         /**
 823          * Return a comma-delimited list of "flags" to be passed to the log
 824          * reader for this block, to provide more information in the logs
 825          * @param $data Array from HTMLForm data
 826          * @param $type Block::TYPE_ constant
 827          * @return array
 828          */
 829         protected static function blockLogFlags( array $data, $type ) {
 830                 global $wgBlockAllowsUTEdit;
 831                 $flags = array();
 832
 833                 # when blocking a user the option 'anononly' is not available/has no effect -> do not write this into log
 834                 if( !$data['HardBlock'] && $type != Block::TYPE_USER ){
 835                         // For grepping: message block-log-flags-anononly
 836                         $flags[] = 'anononly';
 837                 }
 838
 839                 if( $data['CreateAccount'] ){
 840                         // For grepping: message block-log-flags-nocreate
 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                         // For grepping: message block-log-flags-noautoblock
 847                         $flags[] = 'noautoblock';
 848                 }
 849
 850                 if( $data['DisableEmail'] ){
 851                         // For grepping: message block-log-flags-noemail
 852                         $flags[] = 'noemail';
 853                 }
 854
 855                 if( $wgBlockAllowsUTEdit && $data['DisableUTEdit'] ){
 856                         // For grepping: message block-log-flags-nousertalk
 857                         $flags[] = 'nousertalk';
 858                 }
 859
 860                 if( $data['HideUser'] ){
 861                         // For grepping: message block-log-flags-hiddenname
 862                         $flags[] = 'hiddenname';
 863                 }
 864
 865                 return implode( ',', $flags );
 866         }
 867 }
 868
 869 # BC @since 1.18
 870 class IPBlockForm extends SpecialBlock {}