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|string|null 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 = [];
  49
  50         public function __construct() {
  51                 parent::__construct( 'Block', 'block' );
  52         }
  53
  54         public function doesWrites() {
  55                 return true;
  56         }
  57
  58         /**
  59          * Checks that the user can unblock themselves if they are trying to do so
  60          *
  61          * @param User $user
  62          * @throws ErrorPageError
  63          */
  64         protected function checkExecutePermissions( User $user ) {
  65                 parent::checkExecutePermissions( $user );
  66
  67                 # T17810: blocked admins should have limited access here
  68                 $status = self::checkUnblockSelf( $this->target, $user );
  69                 if ( $status !== true ) {
  70                         throw new ErrorPageError( 'badaccess', $status );
  71                 }
  72         }
  73
  74         /**
  75          * Handle some magic here
  76          *
  77          * @param string $par
  78          */
  79         protected function setParameter( $par ) {
  80                 # Extract variables from the request.  Try not to get into a situation where we
  81                 # need to extract *every* variable from the form just for processing here, but
  82                 # there are legitimate uses for some variables
  83                 $request = $this->getRequest();
  84                 list( $this->target, $this->type ) = self::getTargetAndType( $par, $request );
  85                 if ( $this->target instanceof User ) {
  86                         # Set the 'relevant user' in the skin, so it displays links like Contributions,
  87                         # User logs, UserRights, etc.
  88                         $this->getSkin()->setRelevantUser( $this->target );
  89                 }
  90
  91                 list( $this->previousTarget, /*...*/ ) =
  92                         Block::parseTarget( $request->getVal( 'wpPreviousTarget' ) );
  93                 $this->requestedHideUser = $request->getBool( 'wpHideUser' );
  94         }
  95
  96         /**
  97          * Customizes the HTMLForm a bit
  98          *
  99          * @param HTMLForm $form
 100          */
 101         protected function alterForm( HTMLForm $form ) {
 102                 $form->setWrapperLegendMsg( 'blockip-legend' );
 103                 $form->setHeaderText( '' );
 104                 $form->setSubmitDestructive();
 105
 106                 $msg = $this->alreadyBlocked ? 'ipb-change-block' : 'ipbsubmit';
 107                 $form->setSubmitTextMsg( $msg );
 108
 109                 $this->addHelpLink( 'Help:Blocking users' );
 110
 111                 # Don't need to do anything if the form has been posted
 112                 if ( !$this->getRequest()->wasPosted() && $this->preErrors ) {
 113                         $s = $form->formatErrors( $this->preErrors );
 114                         if ( $s ) {
 115                                 $form->addHeaderText( Html::rawElement(
 116                                         'div',
 117                                         [ 'class' => 'error' ],
 118                                         $s
 119                                 ) );
 120                         }
 121                 }
 122         }
 123
 124         /**
 125          * Get the HTMLForm descriptor array for the block form
 126          * @return array
 127          */
 128         protected function getFormFields() {
 129                 global $wgBlockAllowsUTEdit;
 130
 131                 $user = $this->getUser();
 132
 133                 $suggestedDurations = self::getSuggestedDurations();
 134
 135                 $a = [
 136                         'Target' => [
 137                                 'type' => 'text',
 138                                 'label-message' => 'ipaddressorusername',
 139                                 'id' => 'mw-bi-target',
 140                                 'size' => '45',
 141                                 'autofocus' => true,
 142                                 'required' => true,
 143                                 'validation-callback' => [ __CLASS__, 'validateTargetField' ],
 144                                 'cssclass' => 'mw-autocomplete-user', // used by mediawiki.userSuggest
 145                         ],
 146                         'Expiry' => [
 147                                 'type' => !count( $suggestedDurations ) ? 'text' : 'selectorother',
 148                                 'label-message' => 'ipbexpiry',
 149                                 'required' => true,
 150                                 'options' => $suggestedDurations,
 151                                 'other' => $this->msg( 'ipbother' )->text(),
 152                                 'default' => $this->msg( 'ipb-default-expiry' )->inContentLanguage()->text(),
 153                         ],
 154                         'Reason' => [
 155                                 'type' => 'selectandother',
 156                                 'maxlength' => 255,
 157                                 'label-message' => 'ipbreason',
 158                                 'options-message' => 'ipbreason-dropdown',
 159                         ],
 160                         'CreateAccount' => [
 161                                 'type' => 'check',
 162                                 'label-message' => 'ipbcreateaccount',
 163                                 'default' => true,
 164                         ],
 165                 ];
 166
 167                 if ( self::canBlockEmail( $user ) ) {
 168                         $a['DisableEmail'] = [
 169                                 'type' => 'check',
 170                                 'label-message' => 'ipbemailban',
 171                         ];
 172                 }
 173
 174                 if ( $wgBlockAllowsUTEdit ) {
 175                         $a['DisableUTEdit'] = [
 176                                 'type' => 'check',
 177                                 'label-message' => 'ipb-disableusertalk',
 178                                 'default' => false,
 179                         ];
 180                 }
 181
 182                 $a['AutoBlock'] = [
 183                         'type' => 'check',
 184                         'label-message' => 'ipbenableautoblock',
 185                         'default' => true,
 186                 ];
 187
 188                 # Allow some users to hide name from block log, blocklist and listusers
 189                 if ( $user->isAllowed( 'hideuser' ) ) {
 190                         $a['HideUser'] = [
 191                                 'type' => 'check',
 192                                 'label-message' => 'ipbhidename',
 193                                 'cssclass' => 'mw-block-hideuser',
 194                         ];
 195                 }
 196
 197                 # Watchlist their user page? (Only if user is logged in)
 198                 if ( $user->isLoggedIn() ) {
 199                         $a['Watch'] = [
 200                                 'type' => 'check',
 201                                 'label-message' => 'ipbwatchuser',
 202                         ];
 203                 }
 204
 205                 $a['HardBlock'] = [
 206                         'type' => 'check',
 207                         'label-message' => 'ipb-hardblock',
 208                         'default' => false,
 209                 ];
 210
 211                 # This is basically a copy of the Target field, but the user can't change it, so we
 212                 # can see if the warnings we maybe showed to the user before still apply
 213                 $a['PreviousTarget'] = [
 214                         'type' => 'hidden',
 215                         'default' => false,
 216                 ];
 217
 218                 # We'll turn this into a checkbox if we need to
 219                 $a['Confirm'] = [
 220                         'type' => 'hidden',
 221                         'default' => '',
 222                         'label-message' => 'ipb-confirm',
 223                 ];
 224
 225                 $this->maybeAlterFormDefaults( $a );
 226
 227                 // Allow extensions to add more fields
 228                 Hooks::run( 'SpecialBlockModifyFormFields', [ $this, &$a ] );
 229
 230                 return $a;
 231         }
 232
 233         /**
 234          * If the user has already been blocked with similar settings, load that block
 235          * and change the defaults for the form fields to match the existing settings.
 236          * @param array &$fields HTMLForm descriptor array
 237          * @return bool Whether fields were altered (that is, whether the target is
 238          *     already blocked)
 239          */
 240         protected function maybeAlterFormDefaults( &$fields ) {
 241                 # This will be overwritten by request data
 242                 $fields['Target']['default'] = (string)$this->target;
 243
 244                 if ( $this->target ) {
 245                         $status = self::validateTarget( $this->target, $this->getUser() );
 246                         if ( !$status->isOK() ) {
 247                                 $errors = $status->getErrorsArray();
 248                                 $this->preErrors = array_merge( $this->preErrors, $errors );
 249                         }
 250                 }
 251
 252                 # This won't be
 253                 $fields['PreviousTarget']['default'] = (string)$this->target;
 254
 255                 $block = Block::newFromTarget( $this->target );
 256
 257                 if ( $block instanceof Block && !$block->mAuto # The block exists and isn't an autoblock
 258                         && ( $this->type != Block::TYPE_RANGE # The block isn't a rangeblock
 259                                 || $block->getTarget() == $this->target ) # or if it is, the range is what we're about to block
 260                 ) {
 261                         $fields['HardBlock']['default'] = $block->isHardblock();
 262                         $fields['CreateAccount']['default'] = $block->prevents( 'createaccount' );
 263                         $fields['AutoBlock']['default'] = $block->isAutoblocking();
 264
 265                         if ( isset( $fields['DisableEmail'] ) ) {
 266                                 $fields['DisableEmail']['default'] = $block->prevents( 'sendemail' );
 267                         }
 268
 269                         if ( isset( $fields['HideUser'] ) ) {
 270                                 $fields['HideUser']['default'] = $block->mHideName;
 271                         }
 272
 273                         if ( isset( $fields['DisableUTEdit'] ) ) {
 274                                 $fields['DisableUTEdit']['default'] = $block->prevents( 'editownusertalk' );
 275                         }
 276
 277                         // If the username was hidden (ipb_deleted == 1), don't show the reason
 278                         // unless this user also has rights to hideuser: T37839
 279                         if ( !$block->mHideName || $this->getUser()->isAllowed( 'hideuser' ) ) {
 280                                 $fields['Reason']['default'] = $block->mReason;
 281                         } else {
 282                                 $fields['Reason']['default'] = '';
 283                         }
 284
 285                         if ( $this->getRequest()->wasPosted() ) {
 286                                 # Ok, so we got a POST submission asking us to reblock a user.  So show the
 287                                 # confirm checkbox; the user will only see it if they haven't previously
 288                                 $fields['Confirm']['type'] = 'check';
 289                         } else {
 290                                 # We got a target, but it wasn't a POST request, so the user must have gone
 291                                 # to a link like [[Special:Block/User]].  We don't need to show the checkbox
 292                                 # as long as they go ahead and block *that* user
 293                                 $fields['Confirm']['default'] = 1;
 294                         }
 295
 296                         if ( $block->mExpiry == 'infinity' ) {
 297                                 $fields['Expiry']['default'] = 'infinite';
 298                         } else {
 299                                 $fields['Expiry']['default'] = wfTimestamp( TS_RFC2822, $block->mExpiry );
 300                         }
 301
 302                         $this->alreadyBlocked = true;
 303                         $this->preErrors[] = [ 'ipb-needreblock', wfEscapeWikiText( (string)$block->getTarget() ) ];
 304                 }
 305
 306                 # We always need confirmation to do HideUser
 307                 if ( $this->requestedHideUser ) {
 308                         $fields['Confirm']['type'] = 'check';
 309                         unset( $fields['Confirm']['default'] );
 310                         $this->preErrors[] = [ 'ipb-confirmhideuser', 'ipb-confirmaction' ];
 311                 }
 312
 313                 # Or if the user is trying to block themselves
 314                 if ( (string)$this->target === $this->getUser()->getName() ) {
 315                         $fields['Confirm']['type'] = 'check';
 316                         unset( $fields['Confirm']['default'] );
 317                         $this->preErrors[] = [ 'ipb-blockingself', 'ipb-confirmaction' ];
 318                 }
 319         }
 320
 321         /**
 322          * Add header elements like block log entries, etc.
 323          * @return string
 324          */
 325         protected function preText() {
 326                 $this->getOutput()->addModules( [ 'mediawiki.special.block', 'mediawiki.userSuggest' ] );
 327
 328                 $blockCIDRLimit = $this->getConfig()->get( 'BlockCIDRLimit' );
 329                 $text = $this->msg( 'blockiptext', $blockCIDRLimit['IPv4'], $blockCIDRLimit['IPv6'] )->parse();
 330
 331                 $otherBlockMessages = [];
 332                 if ( $this->target !== null ) {
 333                         $targetName = $this->target;
 334                         if ( $this->target instanceof User ) {
 335                                 $targetName = $this->target->getName();
 336                         }
 337                         # Get other blocks, i.e. from GlobalBlocking or TorBlock extension
 338                         Hooks::run( 'OtherBlockLogLink', [ &$otherBlockMessages, $targetName ] );
 339
 340                         if ( count( $otherBlockMessages ) ) {
 341                                 $s = Html::rawElement(
 342                                         'h2',
 343                                         [],
 344                                         $this->msg( 'ipb-otherblocks-header', count( $otherBlockMessages ) )->parse()
 345                                 ) . "\n";
 346
 347                                 $list = '';
 348
 349                                 foreach ( $otherBlockMessages as $link ) {
 350                                         $list .= Html::rawElement( 'li', [], $link ) . "\n";
 351                                 }
 352
 353                                 $s .= Html::rawElement(
 354                                         'ul',
 355                                         [ 'class' => 'mw-blockip-alreadyblocked' ],
 356                                         $list
 357                                 ) . "\n";
 358
 359                                 $text .= $s;
 360                         }
 361                 }
 362
 363                 return $text;
 364         }
 365
 366         /**
 367          * Add footer elements to the form
 368          * @return string
 369          */
 370         protected function postText() {
 371                 $links = [];
 372
 373                 $this->getOutput()->addModuleStyles( 'mediawiki.special' );
 374
 375                 $linkRenderer = $this->getLinkRenderer();
 376                 # Link to the user's contributions, if applicable
 377                 if ( $this->target instanceof User ) {
 378                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $this->target->getName() );
 379                         $links[] = $linkRenderer->makeLink(
 380                                 $contribsPage,
 381                                 $this->msg( 'ipb-blocklist-contribs', $this->target->getName() )->text()
 382                         );
 383                 }
 384
 385                 # Link to unblock the specified user, or to a blank unblock form
 386                 if ( $this->target instanceof User ) {
 387                         $message = $this->msg(
 388                                 'ipb-unblock-addr',
 389                                 wfEscapeWikiText( $this->target->getName() )
 390                         )->parse();
 391                         $list = SpecialPage::getTitleFor( 'Unblock', $this->target->getName() );
 392                 } else {
 393                         $message = $this->msg( 'ipb-unblock' )->parse();
 394                         $list = SpecialPage::getTitleFor( 'Unblock' );
 395                 }
 396                 $links[] = $linkRenderer->makeKnownLink(
 397                         $list,
 398                         new HtmlArmor( $message )
 399                 );
 400
 401                 # Link to the block list
 402                 $links[] = $linkRenderer->makeKnownLink(
 403                         SpecialPage::getTitleFor( 'BlockList' ),
 404                         $this->msg( 'ipb-blocklist' )->text()
 405                 );
 406
 407                 $user = $this->getUser();
 408
 409                 # Link to edit the block dropdown reasons, if applicable
 410                 if ( $user->isAllowed( 'editinterface' ) ) {
 411                         $links[] = $linkRenderer->makeKnownLink(
 412                                 $this->msg( 'ipbreason-dropdown' )->inContentLanguage()->getTitle(),
 413                                 $this->msg( 'ipb-edit-dropdown' )->text(),
 414                                 [],
 415                                 [ 'action' => 'edit' ]
 416                         );
 417                 }
 418
 419                 $text = Html::rawElement(
 420                         'p',
 421                         [ 'class' => 'mw-ipb-conveniencelinks' ],
 422                         $this->getLanguage()->pipeList( $links )
 423                 );
 424
 425                 $userTitle = self::getTargetUserTitle( $this->target );
 426                 if ( $userTitle ) {
 427                         # Get relevant extracts from the block and suppression logs, if possible
 428                         $out = '';
 429
 430                         LogEventsList::showLogExtract(
 431                                 $out,
 432                                 'block',
 433                                 $userTitle,
 434                                 '',
 435                                 [
 436                                         'lim' => 10,
 437                                         'msgKey' => [ 'blocklog-showlog', $userTitle->getText() ],
 438                                         'showIfEmpty' => false
 439                                 ]
 440                         );
 441                         $text .= $out;
 442
 443                         # Add suppression block entries if allowed
 444                         if ( $user->isAllowed( 'suppressionlog' ) ) {
 445                                 LogEventsList::showLogExtract(
 446                                         $out,
 447                                         'suppress',
 448                                         $userTitle,
 449                                         '',
 450                                         [
 451                                                 'lim' => 10,
 452                                                 'conds' => [ 'log_action' => [ 'block', 'reblock', 'unblock' ] ],
 453                                                 'msgKey' => [ 'blocklog-showsuppresslog', $userTitle->getText() ],
 454                                                 'showIfEmpty' => false
 455                                         ]
 456                                 );
 457
 458                                 $text .= $out;
 459                         }
 460                 }
 461
 462                 return $text;
 463         }
 464
 465         /**
 466          * Get a user page target for things like logs.
 467          * This handles account and IP range targets.
 468          * @param User|string $target
 469          * @return Title|null
 470          */
 471         protected static function getTargetUserTitle( $target ) {
 472                 if ( $target instanceof User ) {
 473                         return $target->getUserPage();
 474                 } elseif ( IP::isIPAddress( $target ) ) {
 475                         return Title::makeTitleSafe( NS_USER, $target );
 476                 }
 477
 478                 return null;
 479         }
 480
 481         /**
 482          * Determine the target of the block, and the type of target
 483          * @todo Should be in Block.php?
 484          * @param string $par Subpage parameter passed to setup, or data value from
 485          *     the HTMLForm
 486          * @param WebRequest $request Optionally try and get data from a request too
 487          * @return array [ User|string|null, Block::TYPE_ constant|null ]
 488          */
 489         public static function getTargetAndType( $par, WebRequest $request = null ) {
 490                 $i = 0;
 491                 $target = null;
 492
 493                 while ( true ) {
 494                         switch ( $i++ ) {
 495                                 case 0:
 496                                         # The HTMLForm will check wpTarget first and only if it doesn't get
 497                                         # a value use the default, which will be generated from the options
 498                                         # below; so this has to have a higher precedence here than $par, or
 499                                         # we could end up with different values in $this->target and the HTMLForm!
 500                                         if ( $request instanceof WebRequest ) {
 501                                                 $target = $request->getText( 'wpTarget', null );
 502                                         }
 503                                         break;
 504                                 case 1:
 505                                         $target = $par;
 506                                         break;
 507                                 case 2:
 508                                         if ( $request instanceof WebRequest ) {
 509                                                 $target = $request->getText( 'ip', null );
 510                                         }
 511                                         break;
 512                                 case 3:
 513                                         # B/C @since 1.18
 514                                         if ( $request instanceof WebRequest ) {
 515                                                 $target = $request->getText( 'wpBlockAddress', null );
 516                                         }
 517                                         break;
 518                                 case 4:
 519                                         break 2;
 520                         }
 521
 522                         list( $target, $type ) = Block::parseTarget( $target );
 523
 524                         if ( $type !== null ) {
 525                                 return [ $target, $type ];
 526                         }
 527                 }
 528
 529                 return [ null, null ];
 530         }
 531
 532         /**
 533          * HTMLForm field validation-callback for Target field.
 534          * @since 1.18
 535          * @param string $value
 536          * @param array $alldata
 537          * @param HTMLForm $form
 538          * @return Message
 539          */
 540         public static function validateTargetField( $value, $alldata, $form ) {
 541                 $status = self::validateTarget( $value, $form->getUser() );
 542                 if ( !$status->isOK() ) {
 543                         $errors = $status->getErrorsArray();
 544
 545                         return call_user_func_array( [ $form, 'msg' ], $errors[0] );
 546                 } else {
 547                         return true;
 548                 }
 549         }
 550
 551         /**
 552          * Validate a block target.
 553          *
 554          * @since 1.21
 555          * @param string $value Block target to check
 556          * @param User $user Performer of the block
 557          * @return Status
 558          */
 559         public static function validateTarget( $value, User $user ) {
 560                 global $wgBlockCIDRLimit;
 561
 562                 /** @var User $target */
 563                 list( $target, $type ) = self::getTargetAndType( $value );
 564                 $status = Status::newGood( $target );
 565
 566                 if ( $type == Block::TYPE_USER ) {
 567                         if ( $target->isAnon() ) {
 568                                 $status->fatal(
 569                                         'nosuchusershort',
 570                                         wfEscapeWikiText( $target->getName() )
 571                                 );
 572                         }
 573
 574                         $unblockStatus = self::checkUnblockSelf( $target, $user );
 575                         if ( $unblockStatus !== true ) {
 576                                 $status->fatal( 'badaccess', $unblockStatus );
 577                         }
 578                 } elseif ( $type == Block::TYPE_RANGE ) {
 579                         list( $ip, $range ) = explode( '/', $target, 2 );
 580
 581                         if (
 582                                 ( IP::isIPv4( $ip ) && $wgBlockCIDRLimit['IPv4'] == 32 ) ||
 583                                 ( IP::isIPv6( $ip ) && $wgBlockCIDRLimit['IPv6'] == 128 )
 584                         ) {
 585                                 // Range block effectively disabled
 586                                 $status->fatal( 'range_block_disabled' );
 587                         }
 588
 589                         if (
 590                                 ( IP::isIPv4( $ip ) && $range > 32 ) ||
 591                                 ( IP::isIPv6( $ip ) && $range > 128 )
 592                         ) {
 593                                 // Dodgy range
 594                                 $status->fatal( 'ip_range_invalid' );
 595                         }
 596
 597                         if ( IP::isIPv4( $ip ) && $range < $wgBlockCIDRLimit['IPv4'] ) {
 598                                 $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv4'] );
 599                         }
 600
 601                         if ( IP::isIPv6( $ip ) && $range < $wgBlockCIDRLimit['IPv6'] ) {
 602                                 $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv6'] );
 603                         }
 604                 } elseif ( $type == Block::TYPE_IP ) {
 605                         # All is well
 606                 } else {
 607                         $status->fatal( 'badipaddress' );
 608                 }
 609
 610                 return $status;
 611         }
 612
 613         /**
 614          * Given the form data, actually implement a block. This is also called from ApiBlock.
 615          *
 616          * @param array $data
 617          * @param IContextSource $context
 618          * @return bool|string
 619          */
 620         public static function processForm( array $data, IContextSource $context ) {
 621                 global $wgBlockAllowsUTEdit, $wgHideUserContribLimit;
 622
 623                 $performer = $context->getUser();
 624
 625                 // Handled by field validator callback
 626                 // self::validateTargetField( $data['Target'] );
 627
 628                 # This might have been a hidden field or a checkbox, so interesting data
 629                 # can come from it
 630                 $data['Confirm'] = !in_array( $data['Confirm'], [ '', '0', null, false ], true );
 631
 632                 /** @var User $target */
 633                 list( $target, $type ) = self::getTargetAndType( $data['Target'] );
 634                 if ( $type == Block::TYPE_USER ) {
 635                         $user = $target;
 636                         $target = $user->getName();
 637                         $userId = $user->getId();
 638
 639                         # Give admins a heads-up before they go and block themselves.  Much messier
 640                         # to do this for IPs, but it's pretty unlikely they'd ever get the 'block'
 641                         # permission anyway, although the code does allow for it.
 642                         # Note: Important to use $target instead of $data['Target']
 643                         # since both $data['PreviousTarget'] and $target are normalized
 644                         # but $data['target'] gets overridden by (non-normalized) request variable
 645                         # from previous request.
 646                         if ( $target === $performer->getName() &&
 647                                 ( $data['PreviousTarget'] !== $target || !$data['Confirm'] )
 648                         ) {
 649                                 return [ 'ipb-blockingself', 'ipb-confirmaction' ];
 650                         }
 651                 } elseif ( $type == Block::TYPE_RANGE ) {
 652                         $user = null;
 653                         $userId = 0;
 654                 } elseif ( $type == Block::TYPE_IP ) {
 655                         $user = null;
 656                         $target = $target->getName();
 657                         $userId = 0;
 658                 } else {
 659                         # This should have been caught in the form field validation
 660                         return [ 'badipaddress' ];
 661                 }
 662
 663                 $expiryTime = self::parseExpiryInput( $data['Expiry'] );
 664
 665                 if (
 666                         // an expiry time is needed
 667                         ( strlen( $data['Expiry'] ) == 0 ) ||
 668                         // can't be a larger string as 50 (it should be a time format in any way)
 669                         ( strlen( $data['Expiry'] ) > 50 ) ||
 670                         // check, if the time could be parsed
 671                         !$expiryTime
 672                 ) {
 673                         return [ 'ipb_expiry_invalid' ];
 674                 }
 675
 676                 // an expiry time should be in the future, not in the
 677                 // past (wouldn't make any sense) - bug T123069
 678                 if ( $expiryTime < wfTimestampNow() ) {
 679                         return [ 'ipb_expiry_old' ];
 680                 }
 681
 682                 if ( !isset( $data['DisableEmail'] ) ) {
 683                         $data['DisableEmail'] = false;
 684                 }
 685
 686                 # If the user has done the form 'properly', they won't even have been given the
 687                 # option to suppress-block unless they have the 'hideuser' permission
 688                 if ( !isset( $data['HideUser'] ) ) {
 689                         $data['HideUser'] = false;
 690                 }
 691
 692                 if ( $data['HideUser'] ) {
 693                         if ( !$performer->isAllowed( 'hideuser' ) ) {
 694                                 # this codepath is unreachable except by a malicious user spoofing forms,
 695                                 # or by race conditions (user has hideuser and block rights, loads block form,
 696                                 # and loses hideuser rights before submission); so need to fail completely
 697                                 # rather than just silently disable hiding
 698                                 return [ 'badaccess-group0' ];
 699                         }
 700
 701                         # Recheck params here...
 702                         if ( $type != Block::TYPE_USER ) {
 703                                 $data['HideUser'] = false; # IP users should not be hidden
 704                         } elseif ( !wfIsInfinity( $data['Expiry'] ) ) {
 705                                 # Bad expiry.
 706                                 return [ 'ipb_expiry_temp' ];
 707                         } elseif ( $wgHideUserContribLimit !== false
 708                                 && $user->getEditCount() > $wgHideUserContribLimit
 709                         ) {
 710                                 # Typically, the user should have a handful of edits.
 711                                 # Disallow hiding users with many edits for performance.
 712                                 return [ [ 'ipb_hide_invalid',
 713                                         Message::numParam( $wgHideUserContribLimit ) ] ];
 714                         } elseif ( !$data['Confirm'] ) {
 715                                 return [ 'ipb-confirmhideuser', 'ipb-confirmaction' ];
 716                         }
 717                 }
 718
 719                 # Create block object.
 720                 $block = new Block();
 721                 $block->setTarget( $target );
 722                 $block->setBlocker( $performer );
 723                 $block->mReason = $data['Reason'][0];
 724                 $block->mExpiry = $expiryTime;
 725                 $block->prevents( 'createaccount', $data['CreateAccount'] );
 726                 $block->prevents( 'editownusertalk', ( !$wgBlockAllowsUTEdit || $data['DisableUTEdit'] ) );
 727                 $block->prevents( 'sendemail', $data['DisableEmail'] );
 728                 $block->isHardblock( $data['HardBlock'] );
 729                 $block->isAutoblocking( $data['AutoBlock'] );
 730                 $block->mHideName = $data['HideUser'];
 731
 732                 $reason = [ 'hookaborted' ];
 733                 if ( !Hooks::run( 'BlockIp', [ &$block, &$performer, &$reason ] ) ) {
 734                         return $reason;
 735                 }
 736
 737                 $priorBlock = null;
 738                 # Try to insert block. Is there a conflicting block?
 739                 $status = $block->insert();
 740                 if ( !$status ) {
 741                         # Indicates whether the user is confirming the block and is aware of
 742                         # the conflict (did not change the block target in the meantime)
 743                         $blockNotConfirmed = !$data['Confirm'] || ( array_key_exists( 'PreviousTarget', $data )
 744                                 && $data['PreviousTarget'] !== $target );
 745
 746                         # Special case for API - T34434
 747                         $reblockNotAllowed = ( array_key_exists( 'Reblock', $data ) && !$data['Reblock'] );
 748
 749                         # Show form unless the user is already aware of this...
 750                         if ( $blockNotConfirmed || $reblockNotAllowed ) {
 751                                 return [ [ 'ipb_already_blocked', $block->getTarget() ] ];
 752                                 # Otherwise, try to update the block...
 753                         } else {
 754                                 # This returns direct blocks before autoblocks/rangeblocks, since we should
 755                                 # be sure the user is blocked by now it should work for our purposes
 756                                 $currentBlock = Block::newFromTarget( $target );
 757                                 if ( $block->equals( $currentBlock ) ) {
 758                                         return [ [ 'ipb_already_blocked', $block->getTarget() ] ];
 759                                 }
 760                                 # If the name was hidden and the blocking user cannot hide
 761                                 # names, then don't allow any block changes...
 762                                 if ( $currentBlock->mHideName && !$performer->isAllowed( 'hideuser' ) ) {
 763                                         return [ 'cant-see-hidden-user' ];
 764                                 }
 765
 766                                 $priorBlock = clone $currentBlock;
 767                                 $currentBlock->isHardblock( $block->isHardblock() );
 768                                 $currentBlock->prevents( 'createaccount', $block->prevents( 'createaccount' ) );
 769                                 $currentBlock->mExpiry = $block->mExpiry;
 770                                 $currentBlock->isAutoblocking( $block->isAutoblocking() );
 771                                 $currentBlock->mHideName = $block->mHideName;
 772                                 $currentBlock->prevents( 'sendemail', $block->prevents( 'sendemail' ) );
 773                                 $currentBlock->prevents( 'editownusertalk', $block->prevents( 'editownusertalk' ) );
 774                                 $currentBlock->mReason = $block->mReason;
 775
 776                                 $status = $currentBlock->update();
 777
 778                                 $logaction = 'reblock';
 779
 780                                 # Unset _deleted fields if requested
 781                                 if ( $currentBlock->mHideName && !$data['HideUser'] ) {
 782                                         RevisionDeleteUser::unsuppressUserName( $target, $userId );
 783                                 }
 784
 785                                 # If hiding/unhiding a name, this should go in the private logs
 786                                 if ( (bool)$currentBlock->mHideName ) {
 787                                         $data['HideUser'] = true;
 788                                 }
 789                         }
 790                 } else {
 791                         $logaction = 'block';
 792                 }
 793
 794                 Hooks::run( 'BlockIpComplete', [ $block, $performer, $priorBlock ] );
 795
 796                 # Set *_deleted fields if requested
 797                 if ( $data['HideUser'] ) {
 798                         RevisionDeleteUser::suppressUserName( $target, $userId );
 799                 }
 800
 801                 # Can't watch a rangeblock
 802                 if ( $type != Block::TYPE_RANGE && $data['Watch'] ) {
 803                         WatchAction::doWatch(
 804                                 Title::makeTitle( NS_USER, $target ),
 805                                 $performer,
 806                                 User::IGNORE_USER_RIGHTS
 807                         );
 808                 }
 809
 810                 # Block constructor sanitizes certain block options on insert
 811                 $data['BlockEmail'] = $block->prevents( 'sendemail' );
 812                 $data['AutoBlock'] = $block->isAutoblocking();
 813
 814                 # Prepare log parameters
 815                 $logParams = [];
 816                 $logParams['5::duration'] = $data['Expiry'];
 817                 $logParams['6::flags'] = self::blockLogFlags( $data, $type );
 818
 819                 # Make log entry, if the name is hidden, put it in the suppression log
 820                 $log_type = $data['HideUser'] ? 'suppress' : 'block';
 821                 $logEntry = new ManualLogEntry( $log_type, $logaction );
 822                 $logEntry->setTarget( Title::makeTitle( NS_USER, $target ) );
 823                 $logEntry->setComment( $data['Reason'][0] );
 824                 $logEntry->setPerformer( $performer );
 825                 $logEntry->setParameters( $logParams );
 826                 # Relate log ID to block IDs (T27763)
 827                 $blockIds = array_merge( [ $status['id'] ], $status['autoIds'] );
 828                 $logEntry->setRelations( [ 'ipb_id' => $blockIds ] );
 829                 $logId = $logEntry->insert();
 830
 831                 if ( !empty( $data['Tags'] ) ) {
 832                         $logEntry->setTags( $data['Tags'] );
 833                 }
 834
 835                 $logEntry->publish( $logId );
 836
 837                 return true;
 838         }
 839
 840         /**
 841          * Get an array of suggested block durations from MediaWiki:Ipboptions
 842          * @todo FIXME: This uses a rather odd syntax for the options, should it be converted
 843          *     to the standard "**<duration>|<displayname>" format?
 844          * @param Language|null $lang The language to get the durations in, or null to use
 845          *     the wiki's content language
 846          * @return array
 847          */
 848         public static function getSuggestedDurations( $lang = null ) {
 849                 $a = [];
 850                 $msg = $lang === null
 851                         ? wfMessage( 'ipboptions' )->inContentLanguage()->text()
 852                         : wfMessage( 'ipboptions' )->inLanguage( $lang )->text();
 853
 854                 if ( $msg == '-' ) {
 855                         return [];
 856                 }
 857
 858                 foreach ( explode( ',', $msg ) as $option ) {
 859                         if ( strpos( $option, ':' ) === false ) {
 860                                 $option = "$option:$option";
 861                         }
 862
 863                         list( $show, $value ) = explode( ':', $option );
 864                         $a[$show] = $value;
 865                 }
 866
 867                 return $a;
 868         }
 869
 870         /**
 871          * Convert a submitted expiry time, which may be relative ("2 weeks", etc) or absolute
 872          * ("24 May 2034", etc), into an absolute timestamp we can put into the database.
 873          * @param string $expiry Whatever was typed into the form
 874          * @return string Timestamp or 'infinity'
 875          */
 876         public static function parseExpiryInput( $expiry ) {
 877                 if ( wfIsInfinity( $expiry ) ) {
 878                         $expiry = 'infinity';
 879                 } else {
 880                         $expiry = strtotime( $expiry );
 881
 882                         if ( $expiry < 0 || $expiry === false ) {
 883                                 return false;
 884                         }
 885
 886                         $expiry = wfTimestamp( TS_MW, $expiry );
 887                 }
 888
 889                 return $expiry;
 890         }
 891
 892         /**
 893          * Can we do an email block?
 894          * @param User $user The sysop wanting to make a block
 895          * @return bool
 896          */
 897         public static function canBlockEmail( $user ) {
 898                 global $wgEnableUserEmail, $wgSysopEmailBans;
 899
 900                 return ( $wgEnableUserEmail && $wgSysopEmailBans && $user->isAllowed( 'blockemail' ) );
 901         }
 902
 903         /**
 904          * T17810: blocked admins should not be able to block/unblock
 905          * others, and probably shouldn't be able to unblock themselves
 906          * either.
 907          * @param User|int|string $user
 908          * @param User $performer User doing the request
 909          * @return bool|string True or error message key
 910          */
 911         public static function checkUnblockSelf( $user, User $performer ) {
 912                 if ( is_int( $user ) ) {
 913                         $user = User::newFromId( $user );
 914                 } elseif ( is_string( $user ) ) {
 915                         $user = User::newFromName( $user );
 916                 }
 917
 918                 if ( $performer->isBlocked() ) {
 919                         if ( $user instanceof User && $user->getId() == $performer->getId() ) {
 920                                 # User is trying to unblock themselves
 921                                 if ( $performer->isAllowed( 'unblockself' ) ) {
 922                                         return true;
 923                                         # User blocked themselves and is now trying to reverse it
 924                                 } elseif ( $performer->blockedBy() === $performer->getName() ) {
 925                                         return true;
 926                                 } else {
 927                                         return 'ipbnounblockself';
 928                                 }
 929                         } else {
 930                                 # User is trying to block/unblock someone else
 931                                 return 'ipbblocked';
 932                         }
 933                 } else {
 934                         return true;
 935                 }
 936         }
 937
 938         /**
 939          * Return a comma-delimited list of "flags" to be passed to the log
 940          * reader for this block, to provide more information in the logs
 941          * @param array $data From HTMLForm data
 942          * @param int $type Block::TYPE_ constant (USER, RANGE, or IP)
 943          * @return string
 944          */
 945         protected static function blockLogFlags( array $data, $type ) {
 946                 global $wgBlockAllowsUTEdit;
 947                 $flags = [];
 948
 949                 # when blocking a user the option 'anononly' is not available/has no effect
 950                 # -> do not write this into log
 951                 if ( !$data['HardBlock'] && $type != Block::TYPE_USER ) {
 952                         // For grepping: message block-log-flags-anononly
 953                         $flags[] = 'anononly';
 954                 }
 955
 956                 if ( $data['CreateAccount'] ) {
 957                         // For grepping: message block-log-flags-nocreate
 958                         $flags[] = 'nocreate';
 959                 }
 960
 961                 # Same as anononly, this is not displayed when blocking an IP address
 962                 if ( !$data['AutoBlock'] && $type == Block::TYPE_USER ) {
 963                         // For grepping: message block-log-flags-noautoblock
 964                         $flags[] = 'noautoblock';
 965                 }
 966
 967                 if ( $data['DisableEmail'] ) {
 968                         // For grepping: message block-log-flags-noemail
 969                         $flags[] = 'noemail';
 970                 }
 971
 972                 if ( $wgBlockAllowsUTEdit && $data['DisableUTEdit'] ) {
 973                         // For grepping: message block-log-flags-nousertalk
 974                         $flags[] = 'nousertalk';
 975                 }
 976
 977                 if ( $data['HideUser'] ) {
 978                         // For grepping: message block-log-flags-hiddenname
 979                         $flags[] = 'hiddenname';
 980                 }
 981
 982                 return implode( ',', $flags );
 983         }
 984
 985         /**
 986          * Process the form on POST submission.
 987          * @param array $data
 988          * @param HTMLForm $form
 989          * @return bool|array True for success, false for didn't-try, array of errors on failure
 990          */
 991         public function onSubmit( array $data, HTMLForm $form = null ) {
 992                 return self::processForm( $data, $form->getContext() );
 993         }
 994
 995         /**
 996          * Do something exciting on successful processing of the form, most likely to show a
 997          * confirmation message
 998          */
 999         public function onSuccess() {
1000                 $out = $this->getOutput();
1001                 $out->setPageTitle( $this->msg( 'blockipsuccesssub' ) );
1002                 $out->addWikiMsg( 'blockipsuccesstext', wfEscapeWikiText( $this->target ) );
1003         }
1004
1005         /**
1006          * Return an array of subpages beginning with $search that this special page will accept.
1007          *
1008          * @param string $search Prefix to search for
1009          * @param int $limit Maximum number of results to return (usually 10)
1010          * @param int $offset Number of results to skip (usually 0)
1011          * @return string[] Matching subpages
1012          */
1013         public function prefixSearchSubpages( $search, $limit, $offset ) {
1014                 $user = User::newFromName( $search );
1015                 if ( !$user ) {
1016                         // No prefix suggestion for invalid user
1017                         return [];
1018                 }
1019                 // Autocomplete subpage as user list - public to allow caching
1020                 return UserNamePrefixSearch::search( 'public', $search, $limit, $offset );
1021         }
1022
1023         protected function getGroupName() {
1024                 return 'users';
1025         }
1026 }