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