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
  32         /** The maximum number of edits a user can have and still be hidden
  33          * TODO: config setting? */
  34         const HIDEUSER_CONTRIBLIMIT = 1000;
  35
  36         /** @var User user to be blocked, as passed either by parameter (url?wpTarget=Foo)
  37          * or as subpage (Special:Block/Foo) */
  38         protected $target;
  39
  40         /// @var Block::TYPE_ constant
  41         protected $type;
  42
  43         /// @var  User|String the previous block target
  44         protected $previousTarget;
  45
  46         /// @var Bool whether the previous submission of the form asked for HideUser
  47         protected $requestedHideUser;
  48
  49         /// @var Bool
  50         protected $alreadyBlocked;
  51
  52         /// @var Array
  53         protected $preErrors = array();
  54
  55         public function __construct() {
  56                 parent::__construct( 'Block', 'block' );
  57         }
  58
  59         public function execute( $par ) {
  60                 global $wgUser, $wgOut, $wgRequest;
  61
  62                 # Can't block when the database is locked
  63                 if( wfReadOnly() ) {
  64                         $wgOut->readOnlyPage();
  65                         return;
  66                 }
  67                 # Permission check
  68                 if( !$this->userCanExecute( $wgUser ) ) {
  69                         $wgOut->permissionRequired( 'block' );
  70                         return;
  71                 }
  72
  73                 # Extract variables from the request.  Try not to get into a situation where we
  74                 # need to extract *every* variable from the form just for processing here, but
  75                 # there are legitimate uses for some variables
  76                 list( $this->target, $this->type ) = self::getTargetAndType( $par, $wgRequest );
  77                 if ( $this->target instanceof User ) {
  78                         # Set the 'relevant user' in the skin, so it displays links like Contributions,
  79                         # User logs, UserRights, etc.
  80                         $wgUser->getSkin()->setRelevantUser( $this->target );
  81                 }
  82
  83                 list( $this->previousTarget, /*...*/ ) = Block::parseTarget( $wgRequest->getVal( 'wpPreviousTarget' ) );
  84                 $this->requestedHideUser = $wgRequest->getBool( 'wpHideUser' );
  85
  86                 # bug 15810: blocked admins should have limited access here
  87                 $status = self::checkUnblockSelf( $this->target );
  88                 if ( $status !== true ) {
  89                         throw new ErrorPageError( 'badaccess', $status );
  90                 }
  91
  92                 $wgOut->setPageTitle( wfMsg( 'blockip-title' ) );
  93                 $wgOut->addModules( 'mediawiki.special', 'mediawiki.special.block' );
  94
  95                 $fields = self::getFormFields();
  96                 $this->maybeAlterFormDefaults( $fields );
  97
  98                 $form = new HTMLForm( $fields );
  99                 $form->setTitle( $this->getTitle() );
 100                 $form->setWrapperLegend( wfMsg( 'blockip-legend' ) );
 101                 $form->setSubmitCallback( array( __CLASS__, 'processForm' ) );
 102
 103                 $t = $this->alreadyBlocked
 104                         ? wfMsg( 'ipb-change-block' )
 105                         : wfMsg( 'ipbsubmit' );
 106                 $form->setSubmitText( $t );
 107
 108                 $this->doPreText( $form );
 109                 $this->doHeadertext( $form );
 110                 $this->doPostText( $form );
 111
 112                 if( $form->show() ){
 113                         $wgOut->setPageTitle( wfMsg( 'blockipsuccesssub' ) );
 114                         $wgOut->addWikiMsg( 'blockipsuccesstext',  $this->target );
 115                 }
 116         }
 117
 118         /**
 119          * Get the HTMLForm descriptor array for the block form
 120          * @return Array
 121          */
 122         protected static function getFormFields(){
 123                 global $wgUser, $wgBlockAllowsUTEdit;
 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( $wgUser ) ) {
 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( $wgUser->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( $wgUser->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                 global $wgRequest, $wgUser;
 225
 226                 # This will be overwritten by request data
 227                 $fields['Target']['default'] = (string)$this->target;
 228
 229                 # This won't be
 230                 $fields['PreviousTarget']['default'] = (string)$this->target;
 231
 232                 $block = Block::newFromTarget( $this->target );
 233
 234                 if( $block instanceof Block && !$block->mAuto # The block exists and isn't an autoblock
 235                         && ( $this->type != Block::TYPE_RANGE # The block isn't a rangeblock
 236                           || $block->getTarget() == $this->target ) # or if it is, the range is what we're about to block
 237                         )
 238                 {
 239                         $fields['HardBlock']['default'] = $block->isHardblock();
 240                         $fields['CreateAccount']['default'] = $block->prevents( 'createaccount' );
 241                         $fields['AutoBlock']['default'] = $block->isAutoblocking();
 242                         if( isset( $fields['DisableEmail'] ) ){
 243                                 $fields['DisableEmail']['default'] = $block->prevents( 'sendemail' );
 244                         }
 245                         if( isset( $fields['HideUser'] ) ){
 246                                 $fields['HideUser']['default'] = $block->mHideName;
 247                         }
 248                         if( isset( $fields['DisableUTEdit'] ) ){
 249                                 $fields['DisableUTEdit']['default'] = $block->prevents( 'editownusertalk' );
 250                         }
 251                         $fields['Reason']['default'] = $block->mReason;
 252
 253                         if( $wgRequest->wasPosted() ){
 254                                 # Ok, so we got a POST submission asking us to reblock a user.  So show the
 255                                 # confirm checkbox; the user will only see it if they haven't previously
 256                                 $fields['Confirm']['type'] = 'check';
 257                         } else {
 258                                 # We got a target, but it wasn't a POST request, so the user must have gone
 259                                 # to a link like [[Special:Block/User]].  We don't need to show the checkbox
 260                                 # as long as they go ahead and block *that* user
 261                                 $fields['Confirm']['default'] = 1;
 262                         }
 263
 264                         if( $block->mExpiry == 'infinity' ) {
 265                                 $fields['Expiry']['default'] = 'indefinite';
 266                         } else {
 267                                 $fields['Expiry']['default'] = wfTimestamp( TS_RFC2822, $block->mExpiry );
 268                         }
 269
 270                         $this->alreadyBlocked = true;
 271                         $this->preErrors[] = array( 'ipb-needreblock', (string)$block->getTarget() );
 272                 }
 273
 274                 # We always need confirmation to do HideUser
 275                 if( $this->requestedHideUser ){
 276                         $fields['Confirm']['type'] = 'check';
 277                         unset( $fields['Confirm']['default'] );
 278                         $this->preErrors[] = 'ipb-confirmhideuser';
 279                 }
 280
 281                 # Or if the user is trying to block themselves
 282                 if( (string)$this->target === $wgUser->getName() ){
 283                         $fields['Confirm']['type'] = 'check';
 284                         unset( $fields['Confirm']['default'] );
 285                         $this->preErrors[] = 'ipb-blockingself';
 286                 }
 287         }
 288
 289         /**
 290          * Add header elements like block log entries, etc.
 291          * @param  $form HTMLForm
 292          * @return void
 293          */
 294         protected function doPreText( HTMLForm &$form ){
 295                 $form->addPreText( wfMsgExt( 'blockiptext', 'parse' ) );
 296
 297                 $otherBlockMessages = array();
 298                 if( $this->target !== null ) {
 299                         # Get other blocks, i.e. from GlobalBlocking or TorBlock extension
 300                         wfRunHooks( 'OtherBlockLogLink', array( &$otherBlockMessages, $this->target ) );
 301
 302                         if( count( $otherBlockMessages ) ) {
 303                                 $s = Html::rawElement(
 304                                         'h2',
 305                                         array(),
 306                                         wfMsgExt( 'ipb-otherblocks-header', 'parseinline', count( $otherBlockMessages ) )
 307                                 ) . "\n";
 308                                 $list = '';
 309                                 foreach( $otherBlockMessages as $link ) {
 310                                         $list .= Html::rawElement( 'li', array(), $link ) . "\n";
 311                                 }
 312                                 $s .= Html::rawElement(
 313                                         'ul',
 314                                         array( 'class' => 'mw-blockip-alreadyblocked' ),
 315                                         $list
 316                                 ) . "\n";
 317                                 $form->addPreText( $s );
 318                         }
 319                 }
 320         }
 321
 322         /**
 323          * Add header text inside the form, just underneath where the errors would go
 324          * @param $form HTMLForm
 325          * @return void
 326          */
 327         protected function doHeaderText( HTMLForm &$form ){
 328                 global $wgRequest;
 329                 # Don't need to do anything if the form has been posted
 330                 if( !$wgRequest->wasPosted() && $this->preErrors ){
 331                         $s = HTMLForm::formatErrors( $this->preErrors );
 332                         if( $s ){
 333                                 $form->addHeaderText( Html::rawElement(
 334                                         'div',
 335                                         array( 'class' => 'error' ),
 336                                         $s
 337                                 ) );
 338                         }
 339                 }
 340         }
 341
 342         /**
 343          * Add footer elements to the form
 344          * @param  $form HTMLForm
 345          * @return void
 346          */
 347         protected function doPostText( HTMLForm &$form ){
 348                 global $wgUser, $wgLang;
 349
 350                 $skin = $wgUser->getSkin();
 351
 352                 # Link to the user's contributions, if applicable
 353                 if( $this->target instanceof User ){
 354                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $this->target->getName() );
 355                         $links[] = $skin->link(
 356                                 $contribsPage,
 357                                 wfMsgExt( 'ipb-blocklist-contribs', 'escape', $this->target->getName() )
 358                         );
 359                 }
 360
 361                 # Link to unblock the specified user, or to a blank unblock form
 362                 if( $this->target instanceof User ) {
 363                         $message = wfMsgExt( 'ipb-unblock-addr', array( 'parseinline' ), $this->target->getName() );
 364                         $list = SpecialPage::getTitleFor( 'Unblock', $this->target->getName() );
 365                 } else {
 366                         $message = wfMsgExt( 'ipb-unblock', array( 'parseinline' ) );
 367                         $list = SpecialPage::getTitleFor( 'Unblock' );
 368                 }
 369                 $links[] = $skin->linkKnown( $list, $message, array() );
 370
 371                 # Link to the block list
 372                 $links[] = $skin->linkKnown(
 373                         SpecialPage::getTitleFor( 'BlockList' ),
 374                         wfMsg( 'ipb-blocklist' )
 375                 );
 376
 377                 # Link to edit the block dropdown reasons, if applicable
 378                 if ( $wgUser->isAllowed( 'editinterface' ) ) {
 379                         $links[] = $skin->link(
 380                                 Title::makeTitle( NS_MEDIAWIKI, 'Ipbreason-dropdown' ),
 381                                 wfMsgHtml( 'ipb-edit-dropdown' ),
 382                                 array(),
 383                                 array( 'action' => 'edit' )
 384                         );
 385                 }
 386
 387                 $form->addPostText( Html::rawElement(
 388                         'p',
 389                         array( 'class' => 'mw-ipb-conveniencelinks' ),
 390                         $wgLang->pipeList( $links )
 391                 ) );
 392
 393                 if( $this->target instanceof User ){
 394                         # Get relevant extracts from the block and suppression logs, if possible
 395                         $userpage = $this->target->getUserPage();
 396                         $out = '';
 397
 398                         LogEventsList::showLogExtract(
 399                                 $out,
 400                                 'block',
 401                                 $userpage->getPrefixedText(),
 402                                 '',
 403                                 array(
 404                                         'lim' => 10,
 405                                         'msgKey' => array( 'blocklog-showlog', $userpage->getText() ),
 406                                         'showIfEmpty' => false
 407                                 )
 408                         );
 409                         $form->addPostText( $out );
 410
 411                         # Add suppression block entries if allowed
 412                         if( $wgUser->isAllowed( 'suppressionlog' ) ) {
 413                                 LogEventsList::showLogExtract(
 414                                         $out,
 415                                         'suppress',
 416                                         $userpage->getPrefixedText(),
 417                                         '',
 418                                         array(
 419                                                 'lim' => 10,
 420                                                 'conds' => array( 'log_action' => array( 'block', 'reblock', 'unblock' ) ),
 421                                                 'msgKey' => array( 'blocklog-showsuppresslog', $userpage->getText() ),
 422                                                 'showIfEmpty' => false
 423                                         )
 424                                 );
 425                                 $form->addPostText( $out );
 426                         }
 427                 }
 428         }
 429
 430         /**
 431          * Determine the target of the block, and the type of target
 432          * TODO: should be in Block.php?
 433          * @param $par String subpage parameter passed to setup, or data value from
 434          *     the HTMLForm
 435          * @param $request WebRequest optionally try and get data from a request too
 436          * @return void
 437          */
 438         public static function getTargetAndType( $par, WebRequest $request = null ){
 439                 $i = 0;
 440                 $target = null;
 441                 while( true ){
 442                         switch( $i++ ){
 443                                 case 0:
 444                                         # The HTMLForm will check wpTarget first and only if it doesn't get
 445                                         # a value use the default, which will be generated from the options
 446                                         # below; so this has to have a higher precedence here than $par, or
 447                                         # we could end up with different values in $this->target and the HTMLForm!
 448                                         if( $request instanceof WebRequest ){
 449                                                 $target = $request->getText( 'wpTarget', null );
 450                                         }
 451                                         break;
 452                                 case 1:
 453                                         $target = $par;
 454                                         break;
 455                                 case 2:
 456                                         if( $request instanceof WebRequest ){
 457                                                 $target = $request->getText( 'ip', null );
 458                                         }
 459                                         break;
 460                                 case 3:
 461                                         # B/C @since 1.18
 462                                         if( $request instanceof WebRequest ){
 463                                                 $target = $request->getText( 'wpBlockAddress', null );
 464                                         }
 465                                         break;
 466                                 case 4:
 467                                         break 2;
 468                         }
 469                         list( $target, $type ) = Block::parseTarget( $target );
 470                         if( $type !== null ){
 471                                 return array( $target, $type );
 472                         }
 473                 }
 474                 return array( null, null );
 475         }
 476
 477         /**
 478          * HTMLForm field validation-callback for Target field.
 479          * @since 1.18
 480          * @return Message
 481          */
 482         public static function validateTargetField( $value, $alldata = null ) {
 483                 global $wgBlockCIDRLimit;
 484
 485                 list( $target, $type ) = self::getTargetAndType( $value );
 486
 487                 if( $type == Block::TYPE_USER ){
 488                         # TODO: why do we not have a User->exists() method?
 489                         if( !$target->getId() ){
 490                                 return wfMessage( 'nosuchusershort', $target->getName() );
 491                         }
 492
 493                         $status = self::checkUnblockSelf( $target );
 494                         if ( $status !== true ) {
 495                                 return wfMessage( 'badaccess', $status );
 496                         }
 497
 498                 } elseif( $type == Block::TYPE_RANGE ){
 499                         list( $ip, $range ) = explode( '/', $target, 2 );
 500
 501                         if( ( IP::isIPv4( $ip ) && $wgBlockCIDRLimit['IPv4'] == 32 )
 502                                 || ( IP::isIPv6( $ip ) && $wgBlockCIDRLimit['IPV6'] == 128 ) )
 503                         {
 504                                 # Range block effectively disabled
 505                                 return wfMessage( 'range_block_disabled' );
 506                         }
 507
 508                         if( ( IP::isIPv4( $ip ) && $range > 32 )
 509                                 || ( IP::isIPv6( $ip ) && $range > 128 ) )
 510                         {
 511                                 # Dodgy range
 512                                 return wfMessage( 'ip_range_invalid' );
 513                         }
 514
 515                         if( IP::isIPv4( $ip ) && $range < $wgBlockCIDRLimit['IPv4'] ) {
 516                                 return wfMessage( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv4'] );
 517                         }
 518
 519                         if( IP::isIPv6( $ip ) && $range < $wgBlockCIDRLimit['IPv6'] ) {
 520                                 return wfMessage( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv6'] );
 521                         }
 522
 523                 } elseif( $type == Block::TYPE_IP ){
 524                         # All is well
 525
 526                 } else {
 527                         return wfMessage( 'badipaddress' );
 528                 }
 529
 530                 return true;
 531         }
 532
 533         /**
 534          * Given the form data, actually implement a block
 535          * @param  $data Array
 536          * @return Bool|String
 537          */
 538         public static function processForm( array $data ){
 539                 global $wgUser, $wgBlockAllowsUTEdit;
 540
 541                 // Handled by field validator callback
 542                 // self::validateTargetField( $data['Target'] );
 543
 544                 # This might have been a hidden field or a checkbox, so interesting data
 545                 # can come from it
 546                 $data['Confirm'] = !in_array( $data['Confirm'], array( '', '0', null, false ), true );
 547
 548                 list( $target, $type ) = self::getTargetAndType( $data['Target'] );
 549                 if( $type == Block::TYPE_USER ){
 550                         $user = $target;
 551                         $target = $user->getName();
 552                         $userId = $user->getId();
 553
 554                         # Give admins a heads-up before they go and block themselves.  Much messier
 555                         # to do this for IPs, but it's pretty unlikely they'd ever get the 'block'
 556                         # permission anyway, although the code does allow for it
 557                         if( $target === $wgUser->getName() && ( $data['PreviousTarget'] != $data['Target'] || !$data['Confirm'] ) )
 558                         {
 559                                 return array( 'ipb-blockingself' );
 560                         }
 561
 562                 } elseif( $type == Block::TYPE_RANGE ){
 563                         $userId = 0;
 564
 565                 } elseif( $type == Block::TYPE_IP ){
 566                         $target = $target->getName();
 567                         $userId = 0;
 568
 569                 } else {
 570                         # This should have been caught in the form field validation
 571                         return array( 'badipaddress' );
 572                 }
 573
 574                 if( ( strlen( $data['Expiry'] ) == 0) || ( strlen( $data['Expiry'] ) > 50 )
 575                         || !self::parseExpiryInput( $data['Expiry'] ) )
 576                 {
 577                         return array( 'ipb_expiry_invalid' );
 578                 }
 579
 580                 if( !isset( $data['DisableEmail'] ) ){
 581                         $data['DisableEmail'] = false;
 582                 }
 583
 584                 # If the user has done the form 'properly', they won't even have been given the
 585                 # option to suppress-block unless they have the 'hideuser' permission
 586                 if( !isset( $data['HideUser'] ) ){
 587                         $data['HideUser'] = false;
 588                 }
 589                 if( $data['HideUser'] ) {
 590                         if( !$wgUser->isAllowed('hideuser') ){
 591                                 # this codepath is unreachable except by a malicious user spoofing forms,
 592                                 # or by race conditions (user has oversight and sysop, loads block form,
 593                                 # and is de-oversighted before submission); so need to fail completely
 594                                 # rather than just silently disable hiding
 595                                 return array( 'badaccess-group0' );
 596                         }
 597
 598                         # Recheck params here...
 599                         if( $type != Block::TYPE_USER ) {
 600                                 $data['HideUser'] = false; # IP users should not be hidden
 601
 602                         } elseif( !in_array( $data['Expiry'], array( 'infinite', 'infinity', 'indefinite' ) ) ) {
 603                                 # Bad expiry.
 604                                 return array( 'ipb_expiry_temp' );
 605
 606                         } elseif( $user->getEditCount() > self::HIDEUSER_CONTRIBLIMIT ) {
 607                                 # Typically, the user should have a handful of edits.
 608                                 # Disallow hiding users with many edits for performance.
 609                                 return array( 'ipb_hide_invalid' );
 610
 611                         } elseif( !$data['Confirm'] ){
 612                                 return array( 'ipb-confirmhideuser' );
 613                         }
 614                 }
 615
 616                 # Create block object.
 617                 $block = new Block();
 618                 $block->setTarget( $target );
 619                 $block->setBlocker( $wgUser );
 620                 $block->mReason = $data['Reason'][0];
 621                 $block->mExpiry = self::parseExpiryInput( $data['Expiry'] );
 622                 $block->prevents( 'createaccount', $data['CreateAccount'] );
 623                 $block->prevents( 'editownusertalk', ( !$wgBlockAllowsUTEdit || $data['DisableUTEdit'] ) );
 624                 $block->prevents( 'sendemail', $data['DisableEmail'] );
 625                 $block->isHardblock( $data['HardBlock'] );
 626                 $block->isAutoblocking( $data['AutoBlock'] );
 627                 $block->mHideName = $data['HideUser'];
 628
 629                 if( !wfRunHooks( 'BlockIp', array( &$block, &$wgUser ) ) ) {
 630                         return array( 'hookaborted' );
 631                 }
 632
 633                 # Try to insert block. Is there a conflicting block?
 634                 $status = $block->insert();
 635                 if( !$status ) {
 636                         # Show form unless the user is already aware of this...
 637                         if( ( $data['PreviousTarget'] != htmlspecialchars( $block->getTarget() ) ) || !$data['Confirm'] ) {
 638                                 return array( array( 'ipb_already_blocked', $block->getTarget() ) );
 639                         # Otherwise, try to update the block...
 640                         } else {
 641                                 # This returns direct blocks before autoblocks/rangeblocks, since we should
 642                                 # be sure the user is blocked by now it should work for our purposes
 643                                 $currentBlock = Block::newFromTarget( $target );
 644
 645                                 if( $block->equals( $currentBlock ) ) {
 646                                         return array( array( 'ipb_already_blocked', $block->getTarget() ) );
 647                                 }
 648
 649                                 # If the name was hidden and the blocking user cannot hide
 650                                 # names, then don't allow any block changes...
 651                                 if( $currentBlock->mHideName && !$wgUser->isAllowed( 'hideuser' ) ) {
 652                                         return array( 'cant-see-hidden-user' );
 653                                 }
 654
 655                                 $currentBlock->delete();
 656                                 $status = $block->insert();
 657                                 $logaction = 'reblock';
 658
 659                                 # Unset _deleted fields if requested
 660                                 if( $currentBlock->mHideName && !$data['HideUser'] ) {
 661                                         RevisionDeleteUser::unsuppressUserName( $target, $userId );
 662                                 }
 663
 664                                 # If hiding/unhiding a name, this should go in the private logs
 665                                 if( (bool)$currentBlock->mHideName ){
 666                                         $data['HideUser'] = true;
 667                                 }
 668                         }
 669                 } else {
 670                         $logaction = 'block';
 671                 }
 672
 673                 wfRunHooks( 'BlockIpComplete', array( $block, $wgUser ) );
 674
 675                 # Set *_deleted fields if requested
 676                 if( $data['HideUser'] ) {
 677                         RevisionDeleteUser::suppressUserName( $target, $userId );
 678                 }
 679
 680                 # Can't watch a rangeblock
 681                 if( $type != Block::TYPE_RANGE && $data['Watch'] ) {
 682                         $wgUser->addWatch( Title::makeTitle( NS_USER, $target ) );
 683                 }
 684
 685                 # Block constructor sanitizes certain block options on insert
 686                 $data['BlockEmail'] = $block->prevents( 'sendemail' );
 687                 $data['AutoBlock'] = $block->isAutoblocking();
 688
 689                 # Prepare log parameters
 690                 $logParams = array();
 691                 $logParams[] = $data['Expiry'];
 692                 $logParams[] = self::blockLogFlags( $data, $type );
 693
 694                 # Make log entry, if the name is hidden, put it in the oversight log
 695                 $log_type = $data['HideUser'] ? 'suppress' : 'block';
 696                 $log = new LogPage( $log_type );
 697                 $log_id = $log->addEntry(
 698                         $logaction,
 699                         Title::makeTitle( NS_USER, $target ),
 700                         $data['Reason'][0],
 701                         $logParams
 702                 );
 703                 # Relate log ID to block IDs (bug 25763)
 704                 $blockIds = array_merge( array( $status['id'] ), $status['autoIds']  );
 705                 $log->addRelations( 'ipb_id', $blockIds, $log_id );
 706
 707                 # Report to the user
 708                 return true;
 709         }
 710
 711         /**
 712          * Get an array of suggested block durations from MediaWiki:Ipboptions
 713          * FIXME: this uses a rather odd syntax for the options, should it be converted
 714          *     to the standard "**<duration>|<displayname>" format?
 715          * @return Array
 716          */
 717         public static function getSuggestedDurations( $lang = null ){
 718                 $a = array();
 719                 $msg = $lang === null
 720                         ? wfMessage( 'ipboptions' )->inContentLanguage()->text()
 721                         : wfMessage( 'ipboptions' )->inLanguage( $lang )->text();
 722
 723                 if( $msg == '-' ){
 724                         return array();
 725                 }
 726
 727                 foreach( explode( ',', $msg ) as $option ) {
 728                         if( strpos( $option, ':' ) === false ){
 729                                 $option = "$option:$option";
 730                         }
 731                         list( $show, $value ) = explode( ':', $option );
 732                         $a[htmlspecialchars( $show )] = htmlspecialchars( $value );
 733                 }
 734                 return $a;
 735         }
 736
 737         /**
 738          * Convert a submitted expiry time, which may be relative ("2 weeks", etc) or absolute
 739          * ("24 May 2034", etc), into an absolute timestamp we can put into the database.
 740          * @param $expiry String: whatever was typed into the form
 741          * @return String: timestamp or "infinity" string for the DB implementation
 742          */
 743         public static function parseExpiryInput( $expiry ) {
 744                 static $infinity;
 745                 if( $infinity == null ){
 746                         $infinity = wfGetDB( DB_READ )->getInfinity();
 747                 }
 748                 if ( $expiry == 'infinite' || $expiry == 'indefinite' ) {
 749                         $expiry = $infinity;
 750                 } else {
 751                         $expiry = strtotime( $expiry );
 752                         if ( $expiry < 0 || $expiry === false ) {
 753                                 return false;
 754                         }
 755                         $expiry = wfTimestamp( TS_MW, $expiry );
 756                 }
 757                 return $expiry;
 758         }
 759
 760         /**
 761          * Can we do an email block?
 762          * @param $user User: the sysop wanting to make a block
 763          * @return Boolean
 764          */
 765         public static function canBlockEmail( $user ) {
 766                 global $wgEnableUserEmail, $wgSysopEmailBans;
 767                 return ( $wgEnableUserEmail && $wgSysopEmailBans && $user->isAllowed( 'blockemail' ) );
 768         }
 769
 770         /**
 771          * bug 15810: blocked admins should not be able to block/unblock
 772          * others, and probably shouldn't be able to unblock themselves
 773          * either.
 774          * @param $user User|Int|String
 775          */
 776         public static function checkUnblockSelf( $user ) {
 777                 global $wgUser;
 778                 if ( is_int( $user ) ) {
 779                         $user = User::newFromId( $user );
 780                 } elseif ( is_string( $user ) ) {
 781                         $user = User::newFromName( $user );
 782                 }
 783                 if( $wgUser->isBlocked() ){
 784                         if( $user instanceof User && $user->getId() == $wgUser->getId() ) {
 785                                 # User is trying to unblock themselves
 786                                 if ( $wgUser->isAllowed( 'unblockself' ) ) {
 787                                         return true;
 788                                 } else {
 789                                         return 'ipbnounblockself';
 790                                 }
 791                         } else {
 792                                 # User is trying to block/unblock someone else
 793                                 return 'ipbblocked';
 794                         }
 795                 } else {
 796                         return true;
 797                 }
 798         }
 799
 800         /**
 801          * Return a comma-delimited list of "flags" to be passed to the log
 802          * reader for this block, to provide more information in the logs
 803          * @param $data Array from HTMLForm data
 804          * @param $type Block::TYPE_ constant
 805          * @return array
 806          */
 807         protected static function blockLogFlags( array $data, $type ) {
 808                 global $wgBlockAllowsUTEdit;
 809                 $flags = array();
 810
 811                 # when blocking a user the option 'anononly' is not available/has no effect -> do not write this into log
 812                 if( !$data['HardBlock'] && $type != Block::TYPE_USER ){
 813                         $flags[] = 'anononly';
 814                 }
 815
 816                 if( $data['CreateAccount'] ){
 817                         $flags[] = 'nocreate';
 818                 }
 819
 820                 # Same as anononly, this is not displayed when blocking an IP address
 821                 if( !$data['AutoBlock'] && $type != Block::TYPE_IP ){
 822                         $flags[] = 'noautoblock';
 823                 }
 824
 825                 if( $data['DisableEmail'] ){
 826                         $flags[] = 'noemail';
 827                 }
 828
 829                 if( $data['DisableUTEdit'] && $wgBlockAllowsUTEdit ){
 830                         $flags[] = 'nousertalk';
 831                 }
 832
 833                 if( $data['HideUser'] ){
 834                         $flags[] = 'hiddenname';
 835                 }
 836
 837                 return implode( ',', $flags );
 838         }
 839 }
 840
 841 # BC @since 1.18
 842 class IPBlockForm extends SpecialBlock {}