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 FormSpecialPage {
  31         /** @var User User to be blocked, as passed either by parameter (url?wpTarget=Foo)
  32          * or as subpage (Special:Block/Foo) */
  33         protected $target;
  34
  35         /** @var int Block::TYPE_ constant */
  36         protected $type;
  37
  38         /** @var User|string The previous block target */
  39         protected $previousTarget;
  40
  41         /** @var bool Whether the previous submission of the form asked for HideUser */
  42         protected $requestedHideUser;
  43
  44         /** @var bool */
  45         protected $alreadyBlocked;
  46
  47         /** @var array */
  48         protected $preErrors = array();
  49
  50         public function __construct() {
  51                 parent::__construct( 'Block', 'block' );
  52         }
  53
  54         /**
  55          * Checks that the user can unblock themselves if they are trying to do so
  56          *
  57          * @param User $user
  58          * @throws ErrorPageError
  59          */
  60         protected function checkExecutePermissions( User $user ) {
  61                 parent::checkExecutePermissions( $user );
  62
  63                 # bug 15810: blocked admins should have limited access here
  64                 $status = self::checkUnblockSelf( $this->target, $user );
  65                 if ( $status !== true ) {
  66                         throw new ErrorPageError( 'badaccess', $status );
  67                 }
  68         }
  69
  70         /**
  71          * Handle some magic here
  72          *
  73          * @param string $par
  74          */
  75         protected function setParameter( $par ) {
  76                 # Extract variables from the request.  Try not to get into a situation where we
  77                 # need to extract *every* variable from the form just for processing here, but
  78                 # there are legitimate uses for some variables
  79                 $request = $this->getRequest();
  80                 list( $this->target, $this->type ) = self::getTargetAndType( $par, $request );
  81                 if ( $this->target instanceof User ) {
  82                         # Set the 'relevant user' in the skin, so it displays links like Contributions,
  83                         # User logs, UserRights, etc.
  84                         $this->getSkin()->setRelevantUser( $this->target );
  85                 }
  86
  87                 list( $this->previousTarget, /*...*/ ) =
  88                         Block::parseTarget( $request->getVal( 'wpPreviousTarget' ) );
  89                 $this->requestedHideUser = $request->getBool( 'wpHideUser' );
  90         }
  91
  92         /**
  93          * Customizes the HTMLForm a bit
  94          *
  95          * @param HTMLForm $form
  96          */
  97         protected function alterForm( HTMLForm $form ) {
  98                 $form->setWrapperLegendMsg( 'blockip-legend' );
  99                 $form->setHeaderText( '' );
 100                 $form->setSubmitDestructive();
 101
 102                 $msg = $this->alreadyBlocked ? 'ipb-change-block' : 'ipbsubmit';
 103                 $form->setSubmitTextMsg( $msg );
 104
 105                 $this->addHelpLink( 'Help:Blocking users' );
 106
 107                 # Don't need to do anything if the form has been posted
 108                 if ( !$this->getRequest()->wasPosted() && $this->preErrors ) {
 109                         $s = $form->formatErrors( $this->preErrors );
 110                         if ( $s ) {
 111                                 $form->addHeaderText( Html::rawElement(
 112                                         'div',
 113                                         array( 'class' => 'error' ),
 114                                         $s
 115                                 ) );
 116                         }
 117                 }
 118         }
 119
 120         /**
 121          * Get the HTMLForm descriptor array for the block form
 122          * @return array
 123          */
 124         protected function getFormFields() {
 125                 global $wgBlockAllowsUTEdit;
 126
 127                 $user = $this->getUser();
 128
 129                 $suggestedDurations = self::getSuggestedDurations();
 130
 131                 $a = array(
 132                         'Target' => array(
 133                                 'type' => 'text',
 134                                 'label-message' => 'ipaddressorusername',
 135                                 'id' => 'mw-bi-target',
 136                                 'size' => '45',
 137                                 'autofocus' => true,
 138                                 'required' => true,
 139                                 'validation-callback' => array( __CLASS__, 'validateTargetField' ),
 140                                 'cssclass' => 'mw-autocomplete-user', // used by mediawiki.userSuggest
 141                         ),
 142                         'Expiry' => array(
 143                                 'type' => !count( $suggestedDurations ) ? 'text' : 'selectorother',
 144                                 'label-message' => 'ipbexpiry',
 145                                 'required' => true,
 146                                 'options' => $suggestedDurations,
 147                                 'other' => $this->msg( 'ipbother' )->text(),
 148                                 'default' => $this->msg( 'ipb-default-expiry' )->inContentLanguage()->text(),
 149                         ),
 150                         'Reason' => array(
 151                                 'type' => 'selectandother',
 152                                 'maxlength' => 255,
 153                                 'label-message' => 'ipbreason',
 154                                 'options-message' => 'ipbreason-dropdown',
 155                         ),
 156                         'CreateAccount' => array(
 157                                 'type' => 'check',
 158                                 'label-message' => 'ipbcreateaccount',
 159                                 'default' => true,
 160                         ),
 161                 );
 162
 163                 if ( self::canBlockEmail( $user ) ) {
 164                         $a['DisableEmail'] = array(
 165                                 'type' => 'check',
 166                                 'label-message' => 'ipbemailban',
 167                         );
 168                 }
 169
 170                 if ( $wgBlockAllowsUTEdit ) {
 171                         $a['DisableUTEdit'] = array(
 172                                 'type' => 'check',
 173                                 'label-message' => 'ipb-disableusertalk',
 174                                 'default' => false,
 175                         );
 176                 }
 177
 178                 $a['AutoBlock'] = array(
 179                         'type' => 'check',
 180                         'label-message' => 'ipbenableautoblock',
 181                         'default' => true,
 182                 );
 183
 184                 # Allow some users to hide name from block log, blocklist and listusers
 185                 if ( $user->isAllowed( 'hideuser' ) ) {
 186                         $a['HideUser'] = array(
 187                                 'type' => 'check',
 188                                 'label-message' => 'ipbhidename',
 189                                 'cssclass' => 'mw-block-hideuser',
 190                         );
 191                 }
 192
 193                 # Watchlist their user page? (Only if user is logged in)
 194                 if ( $user->isLoggedIn() ) {
 195                         $a['Watch'] = array(
 196                                 'type' => 'check',
 197                                 'label-message' => 'ipbwatchuser',
 198                         );
 199                 }
 200
 201                 $a['HardBlock'] = array(
 202                         'type' => 'check',
 203                         'label-message' => 'ipb-hardblock',
 204                         'default' => false,
 205                 );
 206
 207                 # This is basically a copy of the Target field, but the user can't change it, so we
 208                 # can see if the warnings we maybe showed to the user before still apply
 209                 $a['PreviousTarget'] = array(
 210                         'type' => 'hidden',
 211                         'default' => false,
 212                 );
 213
 214                 # We'll turn this into a checkbox if we need to
 215                 $a['Confirm'] = array(
 216                         'type' => 'hidden',
 217                         'default' => '',
 218                         'label-message' => 'ipb-confirm',
 219                 );
 220
 221                 $this->maybeAlterFormDefaults( $a );
 222
 223                 // Allow extensions to add more fields
 224                 Hooks::run( 'SpecialBlockModifyFormFields', array( $this, &$a ) );
 225
 226                 return $a;
 227         }
 228
 229         /**
 230          * If the user has already been blocked with similar settings, load that block
 231          * and change the defaults for the form fields to match the existing settings.
 232          * @param array $fields HTMLForm descriptor array
 233          * @return bool Whether fields were altered (that is, whether the target is
 234          *     already blocked)
 235          */
 236         protected function maybeAlterFormDefaults( &$fields ) {
 237                 # This will be overwritten by request data
 238                 $fields['Target']['default'] = (string)$this->target;
 239
 240                 if ( $this->target ) {
 241                         $status = self::validateTarget( $this->target, $this->getUser() );
 242                         if ( !$status->isOK() ) {
 243                                 $errors = $status->getErrorsArray();
 244                                 $this->preErrors = array_merge( $this->preErrors, $errors );
 245                         }
 246                 }
 247
 248                 # This won't be
 249                 $fields['PreviousTarget']['default'] = (string)$this->target;
 250
 251                 $block = Block::newFromTarget( $this->target );
 252
 253                 if ( $block instanceof Block && !$block->mAuto # The block exists and isn't an autoblock
 254                         && ( $this->type != Block::TYPE_RANGE # The block isn't a rangeblock
 255                                 || $block->getTarget() == $this->target ) # or if it is, the range is what we're about to block
 256                 ) {
 257                         $fields['HardBlock']['default'] = $block->isHardblock();
 258                         $fields['CreateAccount']['default'] = $block->prevents( 'createaccount' );
 259                         $fields['AutoBlock']['default'] = $block->isAutoblocking();
 260
 261                         if ( isset( $fields['DisableEmail'] ) ) {
 262                                 $fields['DisableEmail']['default'] = $block->prevents( 'sendemail' );
 263                         }
 264
 265                         if ( isset( $fields['HideUser'] ) ) {
 266                                 $fields['HideUser']['default'] = $block->mHideName;
 267                         }
 268
 269                         if ( isset( $fields['DisableUTEdit'] ) ) {
 270                                 $fields['DisableUTEdit']['default'] = $block->prevents( 'editownusertalk' );
 271                         }
 272
 273                         // If the username was hidden (ipb_deleted == 1), don't show the reason
 274                         // unless this user also has rights to hideuser: Bug 35839
 275                         if ( !$block->mHideName || $this->getUser()->isAllowed( 'hideuser' ) ) {
 276                                 $fields['Reason']['default'] = $block->mReason;
 277                         } else {
 278                                 $fields['Reason']['default'] = '';
 279                         }
 280
 281                         if ( $this->getRequest()->wasPosted() ) {
 282                                 # Ok, so we got a POST submission asking us to reblock a user.  So show the
 283                                 # confirm checkbox; the user will only see it if they haven't previously
 284                                 $fields['Confirm']['type'] = 'check';
 285                         } else {
 286                                 # We got a target, but it wasn't a POST request, so the user must have gone
 287                                 # to a link like [[Special:Block/User]].  We don't need to show the checkbox
 288                                 # as long as they go ahead and block *that* user
 289                                 $fields['Confirm']['default'] = 1;
 290                         }
 291
 292                         if ( $block->mExpiry == 'infinity' ) {
 293                                 $fields['Expiry']['default'] = 'infinite';
 294                         } else {
 295                                 $fields['Expiry']['default'] = wfTimestamp( TS_RFC2822, $block->mExpiry );
 296                         }
 297
 298                         $this->alreadyBlocked = true;
 299                         $this->preErrors[] = array( 'ipb-needreblock', wfEscapeWikiText( (string)$block->getTarget() ) );
 300                 }
 301
 302                 # We always need confirmation to do HideUser
 303                 if ( $this->requestedHideUser ) {
 304                         $fields['Confirm']['type'] = 'check';
 305                         unset( $fields['Confirm']['default'] );
 306                         $this->preErrors[] = array( 'ipb-confirmhideuser', 'ipb-confirmaction' );
 307                 }
 308
 309                 # Or if the user is trying to block themselves
 310                 if ( (string)$this->target === $this->getUser()->getName() ) {
 311                         $fields['Confirm']['type'] = 'check';
 312                         unset( $fields['Confirm']['default'] );
 313                         $this->preErrors[] = array( 'ipb-blockingself', 'ipb-confirmaction' );
 314                 }
 315         }
 316
 317         /**
 318          * Add header elements like block log entries, etc.
 319          * @return string
 320          */
 321         protected function preText() {
 322                 $this->getOutput()->addModules( array( 'mediawiki.special.block', 'mediawiki.userSuggest' ) );
 323
 324                 $blockCIDRLimit = $this->getConfig()->get( 'BlockCIDRLimit' );
 325                 $text = $this->msg( 'blockiptext', $blockCIDRLimit['IPv4'], $blockCIDRLimit['IPv6'] )->parse();
 326
 327                 $otherBlockMessages = array();
 328                 if ( $this->target !== null ) {
 329                         # Get other blocks, i.e. from GlobalBlocking or TorBlock extension
 330                         Hooks::run( 'OtherBlockLogLink', array( &$otherBlockMessages, $this->target ) );
 331
 332                         if ( count( $otherBlockMessages ) ) {
 333                                 $s = Html::rawElement(
 334                                         'h2',
 335                                         array(),
 336                                         $this->msg( 'ipb-otherblocks-header', count( $otherBlockMessages ) )->parse()
 337                                 ) . "\n";
 338
 339                                 $list = '';
 340
 341                                 foreach ( $otherBlockMessages as $link ) {
 342                                         $list .= Html::rawElement( 'li', array(), $link ) . "\n";
 343                                 }
 344
 345                                 $s .= Html::rawElement(
 346                                         'ul',
 347                                         array( 'class' => 'mw-blockip-alreadyblocked' ),
 348                                         $list
 349                                 ) . "\n";
 350
 351                                 $text .= $s;
 352                         }
 353                 }
 354
 355                 return $text;
 356         }
 357
 358         /**
 359          * Add footer elements to the form
 360          * @return string
 361          */
 362         protected function postText() {
 363                 $links = array();
 364
 365                 $this->getOutput()->addModuleStyles( 'mediawiki.special' );
 366
 367                 # Link to the user's contributions, if applicable
 368                 if ( $this->target instanceof User ) {
 369                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $this->target->getName() );
 370                         $links[] = Linker::link(
 371                                 $contribsPage,
 372                                 $this->msg( 'ipb-blocklist-contribs', $this->target->getName() )->escaped()
 373                         );
 374                 }
 375
 376                 # Link to unblock the specified user, or to a blank unblock form
 377                 if ( $this->target instanceof User ) {
 378                         $message = $this->msg(
 379                                 'ipb-unblock-addr',
 380                                 wfEscapeWikiText( $this->target->getName() )
 381                         )->parse();
 382                         $list = SpecialPage::getTitleFor( 'Unblock', $this->target->getName() );
 383                 } else {
 384                         $message = $this->msg( 'ipb-unblock' )->parse();
 385                         $list = SpecialPage::getTitleFor( 'Unblock' );
 386                 }
 387                 $links[] = Linker::linkKnown( $list, $message, array() );
 388
 389                 # Link to the block list
 390                 $links[] = Linker::linkKnown(
 391                         SpecialPage::getTitleFor( 'BlockList' ),
 392                         $this->msg( 'ipb-blocklist' )->escaped()
 393                 );
 394
 395                 $user = $this->getUser();
 396
 397                 # Link to edit the block dropdown reasons, if applicable
 398                 if ( $user->isAllowed( 'editinterface' ) ) {
 399                         $links[] = Linker::linkKnown(
 400                                 $this->msg( 'ipbreason-dropdown' )->inContentLanguage()->getTitle(),
 401                                 $this->msg( 'ipb-edit-dropdown' )->escaped(),
 402                                 array(),
 403                                 array( 'action' => 'edit' )
 404                         );
 405                 }
 406
 407                 $text = Html::rawElement(
 408                         'p',
 409                         array( 'class' => 'mw-ipb-conveniencelinks' ),
 410                         $this->getLanguage()->pipeList( $links )
 411                 );
 412
 413                 $userTitle = self::getTargetUserTitle( $this->target );
 414                 if ( $userTitle ) {
 415                         # Get relevant extracts from the block and suppression logs, if possible
 416                         $out = '';
 417
 418                         LogEventsList::showLogExtract(
 419                                 $out,
 420                                 'block',
 421                                 $userTitle,
 422                                 '',
 423                                 array(
 424                                         'lim' => 10,
 425                                         'msgKey' => array( 'blocklog-showlog', $userTitle->getText() ),
 426                                         'showIfEmpty' => false
 427                                 )
 428                         );
 429                         $text .= $out;
 430
 431                         # Add suppression block entries if allowed
 432                         if ( $user->isAllowed( 'suppressionlog' ) ) {
 433                                 LogEventsList::showLogExtract(
 434                                         $out,
 435                                         'suppress',
 436                                         $userTitle,
 437                                         '',
 438                                         array(
 439                                                 'lim' => 10,
 440                                                 'conds' => array( 'log_action' => array( 'block', 'reblock', 'unblock' ) ),
 441                                                 'msgKey' => array( 'blocklog-showsuppresslog', $userTitle->getText() ),
 442                                                 'showIfEmpty' => false
 443                                         )
 444                                 );
 445
 446                                 $text .= $out;
 447                         }
 448                 }
 449
 450                 return $text;
 451         }
 452
 453         /**
 454          * Get a user page target for things like logs.
 455          * This handles account and IP range targets.
 456          * @param User|string $target
 457          * @return Title|null
 458          */
 459         protected static function getTargetUserTitle( $target ) {
 460                 if ( $target instanceof User ) {
 461                         return $target->getUserPage();
 462                 } elseif ( IP::isIPAddress( $target ) ) {
 463                         return Title::makeTitleSafe( NS_USER, $target );
 464                 }
 465
 466                 return null;
 467         }
 468
 469         /**
 470          * Determine the target of the block, and the type of target
 471          * @todo Should be in Block.php?
 472          * @param string $par Subpage parameter passed to setup, or data value from
 473          *     the HTMLForm
 474          * @param WebRequest $request Optionally try and get data from a request too
 475          * @return array( User|string|null, Block::TYPE_ constant|null )
 476          */
 477         public static function getTargetAndType( $par, WebRequest $request = null ) {
 478                 $i = 0;
 479                 $target = null;
 480
 481                 while ( true ) {
 482                         switch ( $i++ ) {
 483                                 case 0:
 484                                         # The HTMLForm will check wpTarget first and only if it doesn't get
 485                                         # a value use the default, which will be generated from the options
 486                                         # below; so this has to have a higher precedence here than $par, or
 487                                         # we could end up with different values in $this->target and the HTMLForm!
 488                                         if ( $request instanceof WebRequest ) {
 489                                                 $target = $request->getText( 'wpTarget', null );
 490                                         }
 491                                         break;
 492                                 case 1:
 493                                         $target = $par;
 494                                         break;
 495                                 case 2:
 496                                         if ( $request instanceof WebRequest ) {
 497                                                 $target = $request->getText( 'ip', null );
 498                                         }
 499                                         break;
 500                                 case 3:
 501                                         # B/C @since 1.18
 502                                         if ( $request instanceof WebRequest ) {
 503                                                 $target = $request->getText( 'wpBlockAddress', null );
 504                                         }
 505                                         break;
 506                                 case 4:
 507                                         break 2;
 508                         }
 509
 510                         list( $target, $type ) = Block::parseTarget( $target );
 511
 512                         if ( $type !== null ) {
 513                                 return array( $target, $type );
 514                         }
 515                 }
 516
 517                 return array( null, null );
 518         }
 519
 520         /**
 521          * HTMLForm field validation-callback for Target field.
 522          * @since 1.18
 523          * @param string $value
 524          * @param array $alldata
 525          * @param HTMLForm $form
 526          * @return Message
 527          */
 528         public static function validateTargetField( $value, $alldata, $form ) {
 529                 $status = self::validateTarget( $value, $form->getUser() );
 530                 if ( !$status->isOK() ) {
 531                         $errors = $status->getErrorsArray();
 532
 533                         return call_user_func_array( array( $form, 'msg' ), $errors[0] );
 534                 } else {
 535                         return true;
 536                 }
 537         }
 538
 539         /**
 540          * Validate a block target.
 541          *
 542          * @since 1.21
 543          * @param string $value Block target to check
 544          * @param User $user Performer of the block
 545          * @return Status
 546          */
 547         public static function validateTarget( $value, User $user ) {
 548                 global $wgBlockCIDRLimit;
 549
 550                 /** @var User $target */
 551                 list( $target, $type ) = self::getTargetAndType( $value );
 552                 $status = Status::newGood( $target );
 553
 554                 if ( $type == Block::TYPE_USER ) {
 555                         if ( $target->isAnon() ) {
 556                                 $status->fatal(
 557                                         'nosuchusershort',
 558                                         wfEscapeWikiText( $target->getName() )
 559                                 );
 560                         }
 561
 562                         $unblockStatus = self::checkUnblockSelf( $target, $user );
 563                         if ( $unblockStatus !== true ) {
 564                                 $status->fatal( 'badaccess', $unblockStatus );
 565                         }
 566                 } elseif ( $type == Block::TYPE_RANGE ) {
 567                         list( $ip, $range ) = explode( '/', $target, 2 );
 568
 569                         if (
 570                                 ( IP::isIPv4( $ip ) && $wgBlockCIDRLimit['IPv4'] == 32 ) ||
 571                                 ( IP::isIPv6( $ip ) && $wgBlockCIDRLimit['IPv6'] == 128 )
 572                         ) {
 573                                 // Range block effectively disabled
 574                                 $status->fatal( 'range_block_disabled' );
 575                         }
 576
 577                         if (
 578                                 ( IP::isIPv4( $ip ) && $range > 32 ) ||
 579                                 ( IP::isIPv6( $ip ) && $range > 128 )
 580                         ) {
 581                                 // Dodgy range
 582                                 $status->fatal( 'ip_range_invalid' );
 583                         }
 584
 585                         if ( IP::isIPv4( $ip ) && $range < $wgBlockCIDRLimit['IPv4'] ) {
 586                                 $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv4'] );
 587                         }
 588
 589                         if ( IP::isIPv6( $ip ) && $range < $wgBlockCIDRLimit['IPv6'] ) {
 590                                 $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv6'] );
 591                         }
 592                 } elseif ( $type == Block::TYPE_IP ) {
 593                         # All is well
 594                 } else {
 595                         $status->fatal( 'badipaddress' );
 596                 }
 597
 598                 return $status;
 599         }
 600
 601         /**
 602          * Given the form data, actually implement a block. This is also called from ApiBlock.
 603          *
 604          * @param array $data
 605          * @param IContextSource $context
 606          * @return bool|string
 607          */
 608         public static function processForm( array $data, IContextSource $context ) {
 609                 global $wgBlockAllowsUTEdit, $wgHideUserContribLimit, $wgContLang;
 610
 611                 $performer = $context->getUser();
 612
 613                 // Handled by field validator callback
 614                 // self::validateTargetField( $data['Target'] );
 615
 616                 # This might have been a hidden field or a checkbox, so interesting data
 617                 # can come from it
 618                 $data['Confirm'] = !in_array( $data['Confirm'], array( '', '0', null, false ), true );
 619
 620                 /** @var User $target */
 621                 list( $target, $type ) = self::getTargetAndType( $data['Target'] );
 622                 if ( $type == Block::TYPE_USER ) {
 623                         $user = $target;
 624                         $target = $user->getName();
 625                         $userId = $user->getId();
 626
 627                         # Give admins a heads-up before they go and block themselves.  Much messier
 628                         # to do this for IPs, but it's pretty unlikely they'd ever get the 'block'
 629                         # permission anyway, although the code does allow for it.
 630                         # Note: Important to use $target instead of $data['Target']
 631                         # since both $data['PreviousTarget'] and $target are normalized
 632                         # but $data['target'] gets overridden by (non-normalized) request variable
 633                         # from previous request.
 634                         if ( $target === $performer->getName() &&
 635                                 ( $data['PreviousTarget'] !== $target || !$data['Confirm'] )
 636                         ) {
 637                                 return array( 'ipb-blockingself', 'ipb-confirmaction' );
 638                         }
 639                 } elseif ( $type == Block::TYPE_RANGE ) {
 640                         $userId = 0;
 641                 } elseif ( $type == Block::TYPE_IP ) {
 642                         $target = $target->getName();
 643                         $userId = 0;
 644                 } else {
 645                         # This should have been caught in the form field validation
 646                         return array( 'badipaddress' );
 647                 }
 648
 649                 $expiryTime = self::parseExpiryInput( $data['Expiry'] );
 650
 651                 if (
 652                         // an expiry time is needed
 653                         ( strlen( $data['Expiry'] ) == 0 ) ||
 654                         // can't be a larger string as 50 (it should be a time format in any way)
 655                         ( strlen( $data['Expiry'] ) > 50 ) ||
 656                         // check, if the time could be parsed
 657                         !$expiryTime
 658                 ) {
 659                         return array( 'ipb_expiry_invalid' );
 660                 }
 661
 662                 // an expiry time should be in the future, not in the
 663                 // past (wouldn't make any sense) - bug T123069
 664                 if ( $expiryTime < wfTimestampNow() ) {
 665                         return array( 'ipb_expiry_old' );
 666                 }
 667
 668                 if ( !isset( $data['DisableEmail'] ) ) {
 669                         $data['DisableEmail'] = false;
 670                 }
 671
 672                 # If the user has done the form 'properly', they won't even have been given the
 673                 # option to suppress-block unless they have the 'hideuser' permission
 674                 if ( !isset( $data['HideUser'] ) ) {
 675                         $data['HideUser'] = false;
 676                 }
 677
 678                 if ( $data['HideUser'] ) {
 679                         if ( !$performer->isAllowed( 'hideuser' ) ) {
 680                                 # this codepath is unreachable except by a malicious user spoofing forms,
 681                                 # or by race conditions (user has hideuser and block rights, loads block form,
 682                                 # and loses hideuser rights before submission); so need to fail completely
 683                                 # rather than just silently disable hiding
 684                                 return array( 'badaccess-group0' );
 685                         }
 686
 687                         # Recheck params here...
 688                         if ( $type != Block::TYPE_USER ) {
 689                                 $data['HideUser'] = false; # IP users should not be hidden
 690                         } elseif ( !wfIsInfinity( $data['Expiry'] ) ) {
 691                                 # Bad expiry.
 692                                 return array( 'ipb_expiry_temp' );
 693                         } elseif ( $wgHideUserContribLimit !== false
 694                                 && $user->getEditCount() > $wgHideUserContribLimit
 695                         ) {
 696                                 # Typically, the user should have a handful of edits.
 697                                 # Disallow hiding users with many edits for performance.
 698                                 return array( array( 'ipb_hide_invalid',
 699                                         Message::numParam( $wgHideUserContribLimit ) ) );
 700                         } elseif ( !$data['Confirm'] ) {
 701                                 return array( 'ipb-confirmhideuser', 'ipb-confirmaction' );
 702                         }
 703                 }
 704
 705                 # Create block object.
 706                 $block = new Block();
 707                 $block->setTarget( $target );
 708                 $block->setBlocker( $performer );
 709                 # Truncate reason for whole multibyte characters
 710                 $block->mReason = $wgContLang->truncate( $data['Reason'][0], 255 );
 711                 $block->mExpiry = $expiryTime;
 712                 $block->prevents( 'createaccount', $data['CreateAccount'] );
 713                 $block->prevents( 'editownusertalk', ( !$wgBlockAllowsUTEdit || $data['DisableUTEdit'] ) );
 714                 $block->prevents( 'sendemail', $data['DisableEmail'] );
 715                 $block->isHardblock( $data['HardBlock'] );
 716                 $block->isAutoblocking( $data['AutoBlock'] );
 717                 $block->mHideName = $data['HideUser'];
 718
 719                 $reason = array( 'hookaborted' );
 720                 if ( !Hooks::run( 'BlockIp', array( &$block, &$performer, &$reason ) ) ) {
 721                         return $reason;
 722                 }
 723
 724                 # Try to insert block. Is there a conflicting block?
 725                 $status = $block->insert();
 726                 if ( !$status ) {
 727                         # Indicates whether the user is confirming the block and is aware of
 728                         # the conflict (did not change the block target in the meantime)
 729                         $blockNotConfirmed = !$data['Confirm'] || ( array_key_exists( 'PreviousTarget', $data )
 730                                 && $data['PreviousTarget'] !== $target );
 731
 732                         # Special case for API - bug 32434
 733                         $reblockNotAllowed = ( array_key_exists( 'Reblock', $data ) && !$data['Reblock'] );
 734
 735                         # Show form unless the user is already aware of this...
 736                         if ( $blockNotConfirmed || $reblockNotAllowed ) {
 737                                 return array( array( 'ipb_already_blocked', $block->getTarget() ) );
 738                                 # Otherwise, try to update the block...
 739                         } else {
 740                                 # This returns direct blocks before autoblocks/rangeblocks, since we should
 741                                 # be sure the user is blocked by now it should work for our purposes
 742                                 $currentBlock = Block::newFromTarget( $target );
 743
 744                                 if ( $block->equals( $currentBlock ) ) {
 745                                         return array( array( 'ipb_already_blocked', $block->getTarget() ) );
 746                                 }
 747
 748                                 # If the name was hidden and the blocking user cannot hide
 749                                 # names, then don't allow any block changes...
 750                                 if ( $currentBlock->mHideName && !$performer->isAllowed( 'hideuser' ) ) {
 751                                         return array( 'cant-see-hidden-user' );
 752                                 }
 753
 754                                 $currentBlock->isHardblock( $block->isHardblock() );
 755                                 $currentBlock->prevents( 'createaccount', $block->prevents( 'createaccount' ) );
 756                                 $currentBlock->mExpiry = $block->mExpiry;
 757                                 $currentBlock->isAutoblocking( $block->isAutoblocking() );
 758                                 $currentBlock->mHideName = $block->mHideName;
 759                                 $currentBlock->prevents( 'sendemail', $block->prevents( 'sendemail' ) );
 760                                 $currentBlock->prevents( 'editownusertalk', $block->prevents( 'editownusertalk' ) );
 761                                 $currentBlock->mReason = $block->mReason;
 762
 763                                 $status = $currentBlock->update();
 764
 765                                 $logaction = 'reblock';
 766
 767                                 # Unset _deleted fields if requested
 768                                 if ( $currentBlock->mHideName && !$data['HideUser'] ) {
 769                                         RevisionDeleteUser::unsuppressUserName( $target, $userId );
 770                                 }
 771
 772                                 # If hiding/unhiding a name, this should go in the private logs
 773                                 if ( (bool)$currentBlock->mHideName ) {
 774                                         $data['HideUser'] = true;
 775                                 }
 776                         }
 777                 } else {
 778                         $logaction = 'block';
 779                 }
 780
 781                 Hooks::run( 'BlockIpComplete', array( $block, $performer ) );
 782
 783                 # Set *_deleted fields if requested
 784                 if ( $data['HideUser'] ) {
 785                         RevisionDeleteUser::suppressUserName( $target, $userId );
 786                 }
 787
 788                 # Can't watch a rangeblock
 789                 if ( $type != Block::TYPE_RANGE && $data['Watch'] ) {
 790                         WatchAction::doWatch(
 791                                 Title::makeTitle( NS_USER, $target ),
 792                                 $performer,
 793                                 WatchedItem::IGNORE_USER_RIGHTS
 794                         );
 795                 }
 796
 797                 # Block constructor sanitizes certain block options on insert
 798                 $data['BlockEmail'] = $block->prevents( 'sendemail' );
 799                 $data['AutoBlock'] = $block->isAutoblocking();
 800
 801                 # Prepare log parameters
 802                 $logParams = array();
 803                 $logParams['5::duration'] = $data['Expiry'];
 804                 $logParams['6::flags'] = self::blockLogFlags( $data, $type );
 805
 806                 # Make log entry, if the name is hidden, put it in the suppression log
 807                 $log_type = $data['HideUser'] ? 'suppress' : 'block';
 808                 $logEntry = new ManualLogEntry( $log_type, $logaction );
 809                 $logEntry->setTarget( Title::makeTitle( NS_USER, $target ) );
 810                 $logEntry->setComment( $data['Reason'][0] );
 811                 $logEntry->setPerformer( $performer );
 812                 $logEntry->setParameters( $logParams );
 813                 # Relate log ID to block IDs (bug 25763)
 814                 $blockIds = array_merge( array( $status['id'] ), $status['autoIds'] );
 815                 $logEntry->setRelations( array( 'ipb_id' => $blockIds ) );
 816                 $logId = $logEntry->insert();
 817                 $logEntry->publish( $logId );
 818
 819                 # Report to the user
 820                 return true;
 821         }
 822
 823         /**
 824          * Get an array of suggested block durations from MediaWiki:Ipboptions
 825          * @todo FIXME: This uses a rather odd syntax for the options, should it be converted
 826          *     to the standard "**<duration>|<displayname>" format?
 827          * @param Language|null $lang The language to get the durations in, or null to use
 828          *     the wiki's content language
 829          * @return array
 830          */
 831         public static function getSuggestedDurations( $lang = null ) {
 832                 $a = array();
 833                 $msg = $lang === null
 834                         ? wfMessage( 'ipboptions' )->inContentLanguage()->text()
 835                         : wfMessage( 'ipboptions' )->inLanguage( $lang )->text();
 836
 837                 if ( $msg == '-' ) {
 838                         return array();
 839                 }
 840
 841                 foreach ( explode( ',', $msg ) as $option ) {
 842                         if ( strpos( $option, ':' ) === false ) {
 843                                 $option = "$option:$option";
 844                         }
 845
 846                         list( $show, $value ) = explode( ':', $option );
 847                         $a[$show] = $value;
 848                 }
 849
 850                 return $a;
 851         }
 852
 853         /**
 854          * Convert a submitted expiry time, which may be relative ("2 weeks", etc) or absolute
 855          * ("24 May 2034", etc), into an absolute timestamp we can put into the database.
 856          * @param string $expiry Whatever was typed into the form
 857          * @return string Timestamp or 'infinity'
 858          */
 859         public static function parseExpiryInput( $expiry ) {
 860                 if ( wfIsInfinity( $expiry ) ) {
 861                         $expiry = 'infinity';
 862                 } else {
 863                         $expiry = strtotime( $expiry );
 864
 865                         if ( $expiry < 0 || $expiry === false ) {
 866                                 return false;
 867                         }
 868
 869                         $expiry = wfTimestamp( TS_MW, $expiry );
 870                 }
 871
 872                 return $expiry;
 873         }
 874
 875         /**
 876          * Can we do an email block?
 877          * @param User $user The sysop wanting to make a block
 878          * @return bool
 879          */
 880         public static function canBlockEmail( $user ) {
 881                 global $wgEnableUserEmail, $wgSysopEmailBans;
 882
 883                 return ( $wgEnableUserEmail && $wgSysopEmailBans && $user->isAllowed( 'blockemail' ) );
 884         }
 885
 886         /**
 887          * bug 15810: blocked admins should not be able to block/unblock
 888          * others, and probably shouldn't be able to unblock themselves
 889          * either.
 890          * @param User|int|string $user
 891          * @param User $performer User doing the request
 892          * @return bool|string True or error message key
 893          */
 894         public static function checkUnblockSelf( $user, User $performer ) {
 895                 if ( is_int( $user ) ) {
 896                         $user = User::newFromId( $user );
 897                 } elseif ( is_string( $user ) ) {
 898                         $user = User::newFromName( $user );
 899                 }
 900
 901                 if ( $performer->isBlocked() ) {
 902                         if ( $user instanceof User && $user->getId() == $performer->getId() ) {
 903                                 # User is trying to unblock themselves
 904                                 if ( $performer->isAllowed( 'unblockself' ) ) {
 905                                         return true;
 906                                         # User blocked themselves and is now trying to reverse it
 907                                 } elseif ( $performer->blockedBy() === $performer->getName() ) {
 908                                         return true;
 909                                 } else {
 910                                         return 'ipbnounblockself';
 911                                 }
 912                         } else {
 913                                 # User is trying to block/unblock someone else
 914                                 return 'ipbblocked';
 915                         }
 916                 } else {
 917                         return true;
 918                 }
 919         }
 920
 921         /**
 922          * Return a comma-delimited list of "flags" to be passed to the log
 923          * reader for this block, to provide more information in the logs
 924          * @param array $data From HTMLForm data
 925          * @param int $type Block::TYPE_ constant (USER, RANGE, or IP)
 926          * @return string
 927          */
 928         protected static function blockLogFlags( array $data, $type ) {
 929                 global $wgBlockAllowsUTEdit;
 930                 $flags = array();
 931
 932                 # when blocking a user the option 'anononly' is not available/has no effect
 933                 # -> do not write this into log
 934                 if ( !$data['HardBlock'] && $type != Block::TYPE_USER ) {
 935                         // For grepping: message block-log-flags-anononly
 936                         $flags[] = 'anononly';
 937                 }
 938
 939                 if ( $data['CreateAccount'] ) {
 940                         // For grepping: message block-log-flags-nocreate
 941                         $flags[] = 'nocreate';
 942                 }
 943
 944                 # Same as anononly, this is not displayed when blocking an IP address
 945                 if ( !$data['AutoBlock'] && $type == Block::TYPE_USER ) {
 946                         // For grepping: message block-log-flags-noautoblock
 947                         $flags[] = 'noautoblock';
 948                 }
 949
 950                 if ( $data['DisableEmail'] ) {
 951                         // For grepping: message block-log-flags-noemail
 952                         $flags[] = 'noemail';
 953                 }
 954
 955                 if ( $wgBlockAllowsUTEdit && $data['DisableUTEdit'] ) {
 956                         // For grepping: message block-log-flags-nousertalk
 957                         $flags[] = 'nousertalk';
 958                 }
 959
 960                 if ( $data['HideUser'] ) {
 961                         // For grepping: message block-log-flags-hiddenname
 962                         $flags[] = 'hiddenname';
 963                 }
 964
 965                 return implode( ',', $flags );
 966         }
 967
 968         /**
 969          * Process the form on POST submission.
 970          * @param array $data
 971          * @param HTMLForm $form
 972          * @return bool|array True for success, false for didn't-try, array of errors on failure
 973          */
 974         public function onSubmit( array $data, HTMLForm $form = null ) {
 975                 return self::processForm( $data, $form->getContext() );
 976         }
 977
 978         /**
 979          * Do something exciting on successful processing of the form, most likely to show a
 980          * confirmation message
 981          */
 982         public function onSuccess() {
 983                 $out = $this->getOutput();
 984                 $out->setPageTitle( $this->msg( 'blockipsuccesssub' ) );
 985                 $out->addWikiMsg( 'blockipsuccesstext', wfEscapeWikiText( $this->target ) );
 986         }
 987
 988         /**
 989          * Return an array of subpages beginning with $search that this special page will accept.
 990          *
 991          * @param string $search Prefix to search for
 992          * @param int $limit Maximum number of results to return (usually 10)
 993          * @param int $offset Number of results to skip (usually 0)
 994          * @return string[] Matching subpages
 995          */
 996         public function prefixSearchSubpages( $search, $limit, $offset ) {
 997                 $user = User::newFromName( $search );
 998                 if ( !$user ) {
 999                         // No prefix suggestion for invalid user
1000                         return array();
1001                 }
1002                 // Autocomplete subpage as user list - public to allow caching
1003                 return UserNamePrefixSearch::search( 'public', $search, $limit, $offset );
1004         }
1005
1006         protected function getGroupName() {
1007                 return 'users';
1008         }
1009 }