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 use MediaWiki\Block\BlockRestriction;
  25 use MediaWiki\Block\Restriction\PageRestriction;
  26 use MediaWiki\Block\Restriction\NamespaceRestriction;
  27
  28 /**
  29  * A special page that allows users with 'block' right to block users from
  30  * editing pages and other actions
  31  *
  32  * @ingroup SpecialPage
  33  */
  34 class SpecialBlock extends FormSpecialPage {
  35         /** @var User|string|null User to be blocked, as passed either by parameter (url?wpTarget=Foo)
  36          * or as subpage (Special:Block/Foo) */
  37         protected $target;
  38
  39         /** @var int Block::TYPE_ constant */
  40         protected $type;
  41
  42         /** @var User|string The previous block target */
  43         protected $previousTarget;
  44
  45         /** @var bool Whether the previous submission of the form asked for HideUser */
  46         protected $requestedHideUser;
  47
  48         /** @var bool */
  49         protected $alreadyBlocked;
  50
  51         /** @var array */
  52         protected $preErrors = [];
  53
  54         public function __construct() {
  55                 parent::__construct( 'Block', 'block' );
  56         }
  57
  58         public function doesWrites() {
  59                 return true;
  60         }
  61
  62         /**
  63          * Checks that the user can unblock themselves if they are trying to do so
  64          *
  65          * @param User $user
  66          * @throws ErrorPageError
  67          */
  68         protected function checkExecutePermissions( User $user ) {
  69                 parent::checkExecutePermissions( $user );
  70                 # T17810: blocked admins should have limited access here
  71                 $status = self::checkUnblockSelf( $this->target, $user );
  72                 if ( $status !== true ) {
  73                         throw new ErrorPageError( 'badaccess', $status );
  74                 }
  75         }
  76
  77         /**
  78          * We allow certain special cases where user is blocked
  79          *
  80          * @return bool
  81          */
  82         public function requiresUnblock() {
  83                 return false;
  84         }
  85
  86         /**
  87          * Handle some magic here
  88          *
  89          * @param string $par
  90          */
  91         protected function setParameter( $par ) {
  92                 # Extract variables from the request.  Try not to get into a situation where we
  93                 # need to extract *every* variable from the form just for processing here, but
  94                 # there are legitimate uses for some variables
  95                 $request = $this->getRequest();
  96                 list( $this->target, $this->type ) = self::getTargetAndType( $par, $request );
  97                 if ( $this->target instanceof User ) {
  98                         # Set the 'relevant user' in the skin, so it displays links like Contributions,
  99                         # User logs, UserRights, etc.
 100                         $this->getSkin()->setRelevantUser( $this->target );
 101                 }
 102
 103                 list( $this->previousTarget, /*...*/ ) =
 104                         Block::parseTarget( $request->getVal( 'wpPreviousTarget' ) );
 105                 $this->requestedHideUser = $request->getBool( 'wpHideUser' );
 106         }
 107
 108         /**
 109          * Customizes the HTMLForm a bit
 110          *
 111          * @param HTMLForm $form
 112          */
 113         protected function alterForm( HTMLForm $form ) {
 114                 $form->setHeaderText( '' );
 115                 $form->setSubmitDestructive();
 116
 117                 $msg = $this->alreadyBlocked ? 'ipb-change-block' : 'ipbsubmit';
 118                 $form->setSubmitTextMsg( $msg );
 119
 120                 $this->addHelpLink( 'Help:Blocking users' );
 121
 122                 # Don't need to do anything if the form has been posted
 123                 if ( !$this->getRequest()->wasPosted() && $this->preErrors ) {
 124                         $s = $form->formatErrors( $this->preErrors );
 125                         if ( $s ) {
 126                                 $form->addHeaderText( Html::rawElement(
 127                                         'div',
 128                                         [ 'class' => 'error' ],
 129                                         $s
 130                                 ) );
 131                         }
 132                 }
 133         }
 134
 135         protected function getDisplayFormat() {
 136                 return 'ooui';
 137         }
 138
 139         /**
 140          * Get the HTMLForm descriptor array for the block form
 141          * @return array
 142          */
 143         protected function getFormFields() {
 144                 global $wgBlockAllowsUTEdit;
 145
 146                 $user = $this->getUser();
 147
 148                 $suggestedDurations = self::getSuggestedDurations();
 149
 150                 $conf = $this->getConfig();
 151                 $enablePartialBlocks = $conf->get( 'EnablePartialBlocks' );
 152
 153                 $a = [];
 154
 155                 $a['Target'] = [
 156                         'type' => 'user',
 157                         'ipallowed' => true,
 158                         'iprange' => true,
 159                         'id' => 'mw-bi-target',
 160                         'size' => '45',
 161                         'autofocus' => true,
 162                         'required' => true,
 163                         'validation-callback' => [ __CLASS__, 'validateTargetField' ],
 164                         'section' => 'target',
 165                 ];
 166
 167                 $a['Editing'] = [
 168                         'type' => 'check',
 169                         'label-message' => 'block-prevent-edit',
 170                         'default' => true,
 171                         'section' => 'actions',
 172                         'disabled' => $enablePartialBlocks ? false : true,
 173                 ];
 174
 175                 if ( $enablePartialBlocks ) {
 176                         $a['EditingRestriction'] = [
 177                                 'type' => 'radio',
 178                                 'cssclass' => 'mw-block-editing-restriction',
 179                                 'options' => [
 180                                         $this->msg( 'ipb-sitewide' )->text() => 'sitewide',
 181                                         $this->msg( 'ipb-partial' )->text() => 'partial',
 182                                 ],
 183                                 'section' => 'actions',
 184                         ];
 185                         $a['PageRestrictions'] = [
 186                                 'type' => 'titlesmultiselect',
 187                                 'label' => $this->msg( 'ipb-pages-label' )->text(),
 188                                 'exists' => true,
 189                                 'max' => 10,
 190                                 'cssclass' => 'mw-block-restriction',
 191                                 'showMissing' => false,
 192                                 'input' => [
 193                                         'autocomplete' => false
 194                                 ],
 195                                 'section' => 'actions',
 196                         ];
 197                         $a['NamespaceRestrictions'] = [
 198                                 'type' => 'namespacesmultiselect',
 199                                 'label' => $this->msg( 'ipb-namespaces-label' )->text(),
 200                                 'exists' => true,
 201                                 'cssclass' => 'mw-block-restriction',
 202                                 'input' => [
 203                                         'autocomplete' => false
 204                                 ],
 205                                 'section' => 'actions',
 206                         ];
 207                 }
 208
 209                 $a['CreateAccount'] = [
 210                         'type' => 'check',
 211                         'label-message' => 'ipbcreateaccount',
 212                         'default' => true,
 213                         'section' => 'actions',
 214                 ];
 215
 216                 if ( self::canBlockEmail( $user ) ) {
 217                         $a['DisableEmail'] = [
 218                                 'type' => 'check',
 219                                 'label-message' => 'ipbemailban',
 220                                 'section' => 'actions',
 221                         ];
 222                 }
 223
 224                 if ( $wgBlockAllowsUTEdit ) {
 225                         $a['DisableUTEdit'] = [
 226                                 'type' => 'check',
 227                                 'label-message' => 'ipb-disableusertalk',
 228                                 'default' => false,
 229                                 'section' => 'actions',
 230                         ];
 231                 }
 232
 233                 $a['Expiry'] = [
 234                         'type' => 'expiry',
 235                         'required' => true,
 236                         'options' => $suggestedDurations,
 237                         'default' => $this->msg( 'ipb-default-expiry' )->inContentLanguage()->text(),
 238                         'section' => 'expiry',
 239                 ];
 240
 241                 $a['Reason'] = [
 242                         'type' => 'selectandother',
 243                         // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
 244                         // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
 245                         // Unicode codepoints.
 246                         'maxlength' => CommentStore::COMMENT_CHARACTER_LIMIT,
 247                         'maxlength-unit' => 'codepoints',
 248                         'options-message' => 'ipbreason-dropdown',
 249                         'section' => 'reason',
 250                 ];
 251
 252                 $a['AutoBlock'] = [
 253                         'type' => 'check',
 254                         'label-message' => 'ipbenableautoblock',
 255                         'default' => true,
 256                         'section' => 'options',
 257                 ];
 258
 259                 # Allow some users to hide name from block log, blocklist and listusers
 260                 if ( $user->isAllowed( 'hideuser' ) ) {
 261                         $a['HideUser'] = [
 262                                 'type' => 'check',
 263                                 'label-message' => 'ipbhidename',
 264                                 'cssclass' => 'mw-block-hideuser',
 265                                 'section' => 'options',
 266                         ];
 267                 }
 268
 269                 # Watchlist their user page? (Only if user is logged in)
 270                 if ( $user->isLoggedIn() ) {
 271                         $a['Watch'] = [
 272                                 'type' => 'check',
 273                                 'label-message' => 'ipbwatchuser',
 274                                 'section' => 'options',
 275                         ];
 276                 }
 277
 278                 $a['HardBlock'] = [
 279                         'type' => 'check',
 280                         'label-message' => 'ipb-hardblock',
 281                         'default' => false,
 282                         'section' => 'options',
 283                 ];
 284
 285                 # This is basically a copy of the Target field, but the user can't change it, so we
 286                 # can see if the warnings we maybe showed to the user before still apply
 287                 $a['PreviousTarget'] = [
 288                         'type' => 'hidden',
 289                         'default' => false,
 290                 ];
 291
 292                 # We'll turn this into a checkbox if we need to
 293                 $a['Confirm'] = [
 294                         'type' => 'hidden',
 295                         'default' => '',
 296                         'label-message' => 'ipb-confirm',
 297                         'cssclass' => 'mw-block-confirm',
 298                 ];
 299
 300                 $this->maybeAlterFormDefaults( $a );
 301
 302                 // Allow extensions to add more fields
 303                 Hooks::run( 'SpecialBlockModifyFormFields', [ $this, &$a ] );
 304
 305                 return $a;
 306         }
 307
 308         /**
 309          * If the user has already been blocked with similar settings, load that block
 310          * and change the defaults for the form fields to match the existing settings.
 311          * @param array &$fields HTMLForm descriptor array
 312          * @return bool Whether fields were altered (that is, whether the target is
 313          *     already blocked)
 314          */
 315         protected function maybeAlterFormDefaults( &$fields ) {
 316                 # This will be overwritten by request data
 317                 $fields['Target']['default'] = (string)$this->target;
 318
 319                 if ( $this->target ) {
 320                         $status = self::validateTarget( $this->target, $this->getUser() );
 321                         if ( !$status->isOK() ) {
 322                                 $errors = $status->getErrorsArray();
 323                                 $this->preErrors = array_merge( $this->preErrors, $errors );
 324                         }
 325                 }
 326
 327                 # This won't be
 328                 $fields['PreviousTarget']['default'] = (string)$this->target;
 329
 330                 $block = Block::newFromTarget( $this->target );
 331
 332                 if ( $block instanceof Block && !$block->mAuto # The block exists and isn't an autoblock
 333                         && ( $this->type != Block::TYPE_RANGE # The block isn't a rangeblock
 334                                 || $block->getTarget() == $this->target ) # or if it is, the range is what we're about to block
 335                 ) {
 336                         $fields['HardBlock']['default'] = $block->isHardblock();
 337                         $fields['CreateAccount']['default'] = $block->prevents( 'createaccount' );
 338                         $fields['AutoBlock']['default'] = $block->isAutoblocking();
 339
 340                         if ( isset( $fields['DisableEmail'] ) ) {
 341                                 $fields['DisableEmail']['default'] = $block->prevents( 'sendemail' );
 342                         }
 343
 344                         if ( isset( $fields['HideUser'] ) ) {
 345                                 $fields['HideUser']['default'] = $block->mHideName;
 346                         }
 347
 348                         if ( isset( $fields['DisableUTEdit'] ) ) {
 349                                 $fields['DisableUTEdit']['default'] = $block->prevents( 'editownusertalk' );
 350                         }
 351
 352                         // If the username was hidden (ipb_deleted == 1), don't show the reason
 353                         // unless this user also has rights to hideuser: T37839
 354                         if ( !$block->mHideName || $this->getUser()->isAllowed( 'hideuser' ) ) {
 355                                 $fields['Reason']['default'] = $block->mReason;
 356                         } else {
 357                                 $fields['Reason']['default'] = '';
 358                         }
 359
 360                         if ( $this->getRequest()->wasPosted() ) {
 361                                 # Ok, so we got a POST submission asking us to reblock a user.  So show the
 362                                 # confirm checkbox; the user will only see it if they haven't previously
 363                                 $fields['Confirm']['type'] = 'check';
 364                         } else {
 365                                 # We got a target, but it wasn't a POST request, so the user must have gone
 366                                 # to a link like [[Special:Block/User]].  We don't need to show the checkbox
 367                                 # as long as they go ahead and block *that* user
 368                                 $fields['Confirm']['default'] = 1;
 369                         }
 370
 371                         if ( $block->mExpiry == 'infinity' ) {
 372                                 $fields['Expiry']['default'] = 'infinite';
 373                         } else {
 374                                 $fields['Expiry']['default'] = wfTimestamp( TS_RFC2822, $block->mExpiry );
 375                         }
 376
 377                         $this->alreadyBlocked = true;
 378                         $this->preErrors[] = [ 'ipb-needreblock', wfEscapeWikiText( (string)$block->getTarget() ) ];
 379                 }
 380
 381                 # We always need confirmation to do HideUser
 382                 if ( $this->requestedHideUser ) {
 383                         $fields['Confirm']['type'] = 'check';
 384                         unset( $fields['Confirm']['default'] );
 385                         $this->preErrors[] = [ 'ipb-confirmhideuser', 'ipb-confirmaction' ];
 386                 }
 387
 388                 # Or if the user is trying to block themselves
 389                 if ( (string)$this->target === $this->getUser()->getName() ) {
 390                         $fields['Confirm']['type'] = 'check';
 391                         unset( $fields['Confirm']['default'] );
 392                         $this->preErrors[] = [ 'ipb-blockingself', 'ipb-confirmaction' ];
 393                 }
 394
 395                 if ( $this->getConfig()->get( 'EnablePartialBlocks' ) ) {
 396                         if ( $block instanceof Block && !$block->isSitewide() ) {
 397                                 $fields['EditingRestriction']['default'] = 'partial';
 398                         } else {
 399                                 $fields['EditingRestriction']['default'] = 'sitewide';
 400                         }
 401
 402                         if ( $block instanceof Block ) {
 403                                 $pageRestrictions = [];
 404                                 $namespaceRestrictions = [];
 405                                 foreach ( $block->getRestrictions() as $restriction ) {
 406                                         switch ( $restriction->getType() ) {
 407                                                 case PageRestriction::TYPE:
 408                                                         if ( $restriction->getTitle() ) {
 409                                                                 $pageRestrictions[] = $restriction->getTitle()->getPrefixedText();
 410                                                         }
 411                                                         break;
 412                                                 case NamespaceRestriction::TYPE:
 413                                                         $namespaceRestrictions[] = $restriction->getValue();
 414                                                         break;
 415                                         }
 416                                 }
 417
 418                                 if (
 419                                         !$block->isSitewide() &&
 420                                         empty( $pageRestrictions ) &&
 421                                         empty( $namespaceRestrictions )
 422                                 ) {
 423                                         $fields['Editing']['default'] = false;
 424                                 }
 425
 426                                 // Sort the restrictions so they are in alphabetical order.
 427                                 sort( $pageRestrictions );
 428                                 $fields['PageRestrictions']['default'] = implode( "\n", $pageRestrictions );
 429                                 sort( $namespaceRestrictions );
 430                                 $fields['NamespaceRestrictions']['default'] = implode( "\n", $namespaceRestrictions );
 431                         }
 432                 }
 433         }
 434
 435         /**
 436          * Add header elements like block log entries, etc.
 437          * @return string
 438          */
 439         protected function preText() {
 440                 $this->getOutput()->addModuleStyles( [
 441                         'mediawiki.widgets.TagMultiselectWidget.styles',
 442                         'mediawiki.special',
 443                 ] );
 444                 $this->getOutput()->addModules( [ 'mediawiki.special.block' ] );
 445
 446                 $blockCIDRLimit = $this->getConfig()->get( 'BlockCIDRLimit' );
 447                 $text = $this->msg( 'blockiptext', $blockCIDRLimit['IPv4'], $blockCIDRLimit['IPv6'] )->parse();
 448
 449                 $otherBlockMessages = [];
 450                 if ( $this->target !== null ) {
 451                         $targetName = $this->target;
 452                         if ( $this->target instanceof User ) {
 453                                 $targetName = $this->target->getName();
 454                         }
 455                         # Get other blocks, i.e. from GlobalBlocking or TorBlock extension
 456                         Hooks::run( 'OtherBlockLogLink', [ &$otherBlockMessages, $targetName ] );
 457
 458                         if ( count( $otherBlockMessages ) ) {
 459                                 $s = Html::rawElement(
 460                                         'h2',
 461                                         [],
 462                                         $this->msg( 'ipb-otherblocks-header', count( $otherBlockMessages ) )->parse()
 463                                 ) . "\n";
 464
 465                                 $list = '';
 466
 467                                 foreach ( $otherBlockMessages as $link ) {
 468                                         $list .= Html::rawElement( 'li', [], $link ) . "\n";
 469                                 }
 470
 471                                 $s .= Html::rawElement(
 472                                         'ul',
 473                                         [ 'class' => 'mw-blockip-alreadyblocked' ],
 474                                         $list
 475                                 ) . "\n";
 476
 477                                 $text .= $s;
 478                         }
 479                 }
 480
 481                 return $text;
 482         }
 483
 484         /**
 485          * Add footer elements to the form
 486          * @return string
 487          */
 488         protected function postText() {
 489                 $links = [];
 490
 491                 $this->getOutput()->addModuleStyles( 'mediawiki.special' );
 492
 493                 $linkRenderer = $this->getLinkRenderer();
 494                 # Link to the user's contributions, if applicable
 495                 if ( $this->target instanceof User ) {
 496                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $this->target->getName() );
 497                         $links[] = $linkRenderer->makeLink(
 498                                 $contribsPage,
 499                                 $this->msg( 'ipb-blocklist-contribs', $this->target->getName() )->text()
 500                         );
 501                 }
 502
 503                 # Link to unblock the specified user, or to a blank unblock form
 504                 if ( $this->target instanceof User ) {
 505                         $message = $this->msg(
 506                                 'ipb-unblock-addr',
 507                                 wfEscapeWikiText( $this->target->getName() )
 508                         )->parse();
 509                         $list = SpecialPage::getTitleFor( 'Unblock', $this->target->getName() );
 510                 } else {
 511                         $message = $this->msg( 'ipb-unblock' )->parse();
 512                         $list = SpecialPage::getTitleFor( 'Unblock' );
 513                 }
 514                 $links[] = $linkRenderer->makeKnownLink(
 515                         $list,
 516                         new HtmlArmor( $message )
 517                 );
 518
 519                 # Link to the block list
 520                 $links[] = $linkRenderer->makeKnownLink(
 521                         SpecialPage::getTitleFor( 'BlockList' ),
 522                         $this->msg( 'ipb-blocklist' )->text()
 523                 );
 524
 525                 $user = $this->getUser();
 526
 527                 # Link to edit the block dropdown reasons, if applicable
 528                 if ( $user->isAllowed( 'editinterface' ) ) {
 529                         $links[] = $linkRenderer->makeKnownLink(
 530                                 $this->msg( 'ipbreason-dropdown' )->inContentLanguage()->getTitle(),
 531                                 $this->msg( 'ipb-edit-dropdown' )->text(),
 532                                 [],
 533                                 [ 'action' => 'edit' ]
 534                         );
 535                 }
 536
 537                 $text = Html::rawElement(
 538                         'p',
 539                         [ 'class' => 'mw-ipb-conveniencelinks' ],
 540                         $this->getLanguage()->pipeList( $links )
 541                 );
 542
 543                 $userTitle = self::getTargetUserTitle( $this->target );
 544                 if ( $userTitle ) {
 545                         # Get relevant extracts from the block and suppression logs, if possible
 546                         $out = '';
 547
 548                         LogEventsList::showLogExtract(
 549                                 $out,
 550                                 'block',
 551                                 $userTitle,
 552                                 '',
 553                                 [
 554                                         'lim' => 10,
 555                                         'msgKey' => [ 'blocklog-showlog', $userTitle->getText() ],
 556                                         'showIfEmpty' => false
 557                                 ]
 558                         );
 559                         $text .= $out;
 560
 561                         # Add suppression block entries if allowed
 562                         if ( $user->isAllowed( 'suppressionlog' ) ) {
 563                                 LogEventsList::showLogExtract(
 564                                         $out,
 565                                         'suppress',
 566                                         $userTitle,
 567                                         '',
 568                                         [
 569                                                 'lim' => 10,
 570                                                 'conds' => [ 'log_action' => [ 'block', 'reblock', 'unblock' ] ],
 571                                                 'msgKey' => [ 'blocklog-showsuppresslog', $userTitle->getText() ],
 572                                                 'showIfEmpty' => false
 573                                         ]
 574                                 );
 575
 576                                 $text .= $out;
 577                         }
 578                 }
 579
 580                 return $text;
 581         }
 582
 583         /**
 584          * Get a user page target for things like logs.
 585          * This handles account and IP range targets.
 586          * @param User|string $target
 587          * @return Title|null
 588          */
 589         protected static function getTargetUserTitle( $target ) {
 590                 if ( $target instanceof User ) {
 591                         return $target->getUserPage();
 592                 } elseif ( IP::isIPAddress( $target ) ) {
 593                         return Title::makeTitleSafe( NS_USER, $target );
 594                 }
 595
 596                 return null;
 597         }
 598
 599         /**
 600          * Determine the target of the block, and the type of target
 601          * @todo Should be in Block.php?
 602          * @param string $par Subpage parameter passed to setup, or data value from
 603          *     the HTMLForm
 604          * @param WebRequest|null $request Optionally try and get data from a request too
 605          * @return array [ User|string|null, Block::TYPE_ constant|null ]
 606          */
 607         public static function getTargetAndType( $par, WebRequest $request = null ) {
 608                 $i = 0;
 609                 $target = null;
 610
 611                 while ( true ) {
 612                         switch ( $i++ ) {
 613                                 case 0:
 614                                         # The HTMLForm will check wpTarget first and only if it doesn't get
 615                                         # a value use the default, which will be generated from the options
 616                                         # below; so this has to have a higher precedence here than $par, or
 617                                         # we could end up with different values in $this->target and the HTMLForm!
 618                                         if ( $request instanceof WebRequest ) {
 619                                                 $target = $request->getText( 'wpTarget', null );
 620                                         }
 621                                         break;
 622                                 case 1:
 623                                         $target = $par;
 624                                         break;
 625                                 case 2:
 626                                         if ( $request instanceof WebRequest ) {
 627                                                 $target = $request->getText( 'ip', null );
 628                                         }
 629                                         break;
 630                                 case 3:
 631                                         # B/C @since 1.18
 632                                         if ( $request instanceof WebRequest ) {
 633                                                 $target = $request->getText( 'wpBlockAddress', null );
 634                                         }
 635                                         break;
 636                                 case 4:
 637                                         break 2;
 638                         }
 639
 640                         list( $target, $type ) = Block::parseTarget( $target );
 641
 642                         if ( $type !== null ) {
 643                                 return [ $target, $type ];
 644                         }
 645                 }
 646
 647                 return [ null, null ];
 648         }
 649
 650         /**
 651          * HTMLForm field validation-callback for Target field.
 652          * @since 1.18
 653          * @param string $value
 654          * @param array $alldata
 655          * @param HTMLForm $form
 656          * @return Message
 657          */
 658         public static function validateTargetField( $value, $alldata, $form ) {
 659                 $status = self::validateTarget( $value, $form->getUser() );
 660                 if ( !$status->isOK() ) {
 661                         $errors = $status->getErrorsArray();
 662
 663                         return $form->msg( ...$errors[0] );
 664                 } else {
 665                         return true;
 666                 }
 667         }
 668
 669         /**
 670          * Validate a block target.
 671          *
 672          * @since 1.21
 673          * @param string $value Block target to check
 674          * @param User $user Performer of the block
 675          * @return Status
 676          */
 677         public static function validateTarget( $value, User $user ) {
 678                 global $wgBlockCIDRLimit;
 679
 680                 /** @var User $target */
 681                 list( $target, $type ) = self::getTargetAndType( $value );
 682                 $status = Status::newGood( $target );
 683
 684                 if ( $type == Block::TYPE_USER ) {
 685                         if ( $target->isAnon() ) {
 686                                 $status->fatal(
 687                                         'nosuchusershort',
 688                                         wfEscapeWikiText( $target->getName() )
 689                                 );
 690                         }
 691
 692                         $unblockStatus = self::checkUnblockSelf( $target, $user );
 693                         if ( $unblockStatus !== true ) {
 694                                 $status->fatal( 'badaccess', $unblockStatus );
 695                         }
 696                 } elseif ( $type == Block::TYPE_RANGE ) {
 697                         list( $ip, $range ) = explode( '/', $target, 2 );
 698
 699                         if (
 700                                 ( IP::isIPv4( $ip ) && $wgBlockCIDRLimit['IPv4'] == 32 ) ||
 701                                 ( IP::isIPv6( $ip ) && $wgBlockCIDRLimit['IPv6'] == 128 )
 702                         ) {
 703                                 // Range block effectively disabled
 704                                 $status->fatal( 'range_block_disabled' );
 705                         }
 706
 707                         if (
 708                                 ( IP::isIPv4( $ip ) && $range > 32 ) ||
 709                                 ( IP::isIPv6( $ip ) && $range > 128 )
 710                         ) {
 711                                 // Dodgy range
 712                                 $status->fatal( 'ip_range_invalid' );
 713                         }
 714
 715                         if ( IP::isIPv4( $ip ) && $range < $wgBlockCIDRLimit['IPv4'] ) {
 716                                 $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv4'] );
 717                         }
 718
 719                         if ( IP::isIPv6( $ip ) && $range < $wgBlockCIDRLimit['IPv6'] ) {
 720                                 $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv6'] );
 721                         }
 722                 } elseif ( $type == Block::TYPE_IP ) {
 723                         # All is well
 724                 } else {
 725                         $status->fatal( 'badipaddress' );
 726                 }
 727
 728                 return $status;
 729         }
 730
 731         /**
 732          * Given the form data, actually implement a block. This is also called from ApiBlock.
 733          *
 734          * @param array $data
 735          * @param IContextSource $context
 736          * @return bool|string
 737          */
 738         public static function processForm( array $data, IContextSource $context ) {
 739                 global $wgBlockAllowsUTEdit, $wgHideUserContribLimit;
 740
 741                 $performer = $context->getUser();
 742                 $enablePartialBlocks = $context->getConfig()->get( 'EnablePartialBlocks' );
 743                 $isPartialBlock = $enablePartialBlocks &&
 744                         isset( $data['EditingRestriction'] ) &&
 745                         $data['EditingRestriction'] === 'partial';
 746
 747                 // Handled by field validator callback
 748                 // self::validateTargetField( $data['Target'] );
 749
 750                 # This might have been a hidden field or a checkbox, so interesting data
 751                 # can come from it
 752                 $data['Confirm'] = !in_array( $data['Confirm'], [ '', '0', null, false ], true );
 753
 754                 /** @var User $target */
 755                 list( $target, $type ) = self::getTargetAndType( $data['Target'] );
 756                 if ( $type == Block::TYPE_USER ) {
 757                         $user = $target;
 758                         $target = $user->getName();
 759                         $userId = $user->getId();
 760
 761                         # Give admins a heads-up before they go and block themselves.  Much messier
 762                         # to do this for IPs, but it's pretty unlikely they'd ever get the 'block'
 763                         # permission anyway, although the code does allow for it.
 764                         # Note: Important to use $target instead of $data['Target']
 765                         # since both $data['PreviousTarget'] and $target are normalized
 766                         # but $data['target'] gets overridden by (non-normalized) request variable
 767                         # from previous request.
 768                         if ( $target === $performer->getName() &&
 769                                 ( $data['PreviousTarget'] !== $target || !$data['Confirm'] )
 770                         ) {
 771                                 return [ 'ipb-blockingself', 'ipb-confirmaction' ];
 772                         }
 773                 } elseif ( $type == Block::TYPE_RANGE ) {
 774                         $user = null;
 775                         $userId = 0;
 776                 } elseif ( $type == Block::TYPE_IP ) {
 777                         $user = null;
 778                         $target = $target->getName();
 779                         $userId = 0;
 780                 } else {
 781                         # This should have been caught in the form field validation
 782                         return [ 'badipaddress' ];
 783                 }
 784
 785                 $expiryTime = self::parseExpiryInput( $data['Expiry'] );
 786
 787                 if (
 788                         // an expiry time is needed
 789                         ( strlen( $data['Expiry'] ) == 0 ) ||
 790                         // can't be a larger string as 50 (it should be a time format in any way)
 791                         ( strlen( $data['Expiry'] ) > 50 ) ||
 792                         // check, if the time could be parsed
 793                         !$expiryTime
 794                 ) {
 795                         return [ 'ipb_expiry_invalid' ];
 796                 }
 797
 798                 // an expiry time should be in the future, not in the
 799                 // past (wouldn't make any sense) - bug T123069
 800                 if ( $expiryTime < wfTimestampNow() ) {
 801                         return [ 'ipb_expiry_old' ];
 802                 }
 803
 804                 if ( !isset( $data['DisableEmail'] ) ) {
 805                         $data['DisableEmail'] = false;
 806                 }
 807
 808                 # If the user has done the form 'properly', they won't even have been given the
 809                 # option to suppress-block unless they have the 'hideuser' permission
 810                 if ( !isset( $data['HideUser'] ) ) {
 811                         $data['HideUser'] = false;
 812                 }
 813
 814                 if ( $data['HideUser'] ) {
 815                         if ( !$performer->isAllowed( 'hideuser' ) ) {
 816                                 # this codepath is unreachable except by a malicious user spoofing forms,
 817                                 # or by race conditions (user has hideuser and block rights, loads block form,
 818                                 # and loses hideuser rights before submission); so need to fail completely
 819                                 # rather than just silently disable hiding
 820                                 return [ 'badaccess-group0' ];
 821                         }
 822
 823                         if ( $isPartialBlock ) {
 824                                 return [ 'ipb_hide_partial' ];
 825                         }
 826
 827                         # Recheck params here...
 828                         if ( $type != Block::TYPE_USER ) {
 829                                 $data['HideUser'] = false; # IP users should not be hidden
 830                         } elseif ( !wfIsInfinity( $data['Expiry'] ) ) {
 831                                 # Bad expiry.
 832                                 return [ 'ipb_expiry_temp' ];
 833                         } elseif ( $wgHideUserContribLimit !== false
 834                                 && $user->getEditCount() > $wgHideUserContribLimit
 835                         ) {
 836                                 # Typically, the user should have a handful of edits.
 837                                 # Disallow hiding users with many edits for performance.
 838                                 return [ [ 'ipb_hide_invalid',
 839                                         Message::numParam( $wgHideUserContribLimit ) ] ];
 840                         } elseif ( !$data['Confirm'] ) {
 841                                 return [ 'ipb-confirmhideuser', 'ipb-confirmaction' ];
 842                         }
 843                 }
 844
 845                 # Create block object.
 846                 $block = new Block();
 847                 $block->setTarget( $target );
 848                 $block->setBlocker( $performer );
 849                 $block->mReason = $data['Reason'][0];
 850                 $block->mExpiry = $expiryTime;
 851                 $block->prevents( 'createaccount', $data['CreateAccount'] );
 852                 $block->prevents( 'editownusertalk', ( !$wgBlockAllowsUTEdit || $data['DisableUTEdit'] ) );
 853                 $block->prevents( 'sendemail', $data['DisableEmail'] );
 854                 $block->isHardblock( $data['HardBlock'] );
 855                 $block->isAutoblocking( $data['AutoBlock'] );
 856                 $block->mHideName = $data['HideUser'];
 857
 858                 if ( $isPartialBlock ) {
 859                         $block->isSitewide( false );
 860                 }
 861
 862                 $reason = [ 'hookaborted' ];
 863                 if ( !Hooks::run( 'BlockIp', [ &$block, &$performer, &$reason ] ) ) {
 864                         return $reason;
 865                 }
 866
 867                 $pageRestrictions = [];
 868                 $namespaceRestrictions = [];
 869                 if ( $enablePartialBlocks ) {
 870                         if ( $data['PageRestrictions'] !== '' ) {
 871                                 $pageRestrictions = array_map( function ( $text ) {
 872                                         $title = Title::newFromText( $text );
 873                                         // Use the link cache since the title has already been loaded when
 874                                         // the field was validated.
 875                                         $restriction = new PageRestriction( 0, $title->getArticleID() );
 876                                         $restriction->setTitle( $title );
 877                                         return $restriction;
 878                                 }, explode( "\n", $data['PageRestrictions'] ) );
 879                         }
 880                         if ( $data['NamespaceRestrictions'] !== '' ) {
 881                                 $namespaceRestrictions = array_map( function ( $id ) {
 882                                         return new NamespaceRestriction( 0, $id );
 883                                 }, explode( "\n", $data['NamespaceRestrictions'] ) );
 884                         }
 885
 886                         $restrictions = ( array_merge( $pageRestrictions, $namespaceRestrictions ) );
 887                         $block->setRestrictions( $restrictions );
 888                 }
 889
 890                 $priorBlock = null;
 891                 # Try to insert block. Is there a conflicting block?
 892                 $status = $block->insert();
 893                 if ( !$status ) {
 894                         # Indicates whether the user is confirming the block and is aware of
 895                         # the conflict (did not change the block target in the meantime)
 896                         $blockNotConfirmed = !$data['Confirm'] || ( array_key_exists( 'PreviousTarget', $data )
 897                                 && $data['PreviousTarget'] !== $target );
 898
 899                         # Special case for API - T34434
 900                         $reblockNotAllowed = ( array_key_exists( 'Reblock', $data ) && !$data['Reblock'] );
 901
 902                         # Show form unless the user is already aware of this...
 903                         if ( $blockNotConfirmed || $reblockNotAllowed ) {
 904                                 return [ [ 'ipb_already_blocked', $block->getTarget() ] ];
 905                                 # Otherwise, try to update the block...
 906                         } else {
 907                                 # This returns direct blocks before autoblocks/rangeblocks, since we should
 908                                 # be sure the user is blocked by now it should work for our purposes
 909                                 $currentBlock = Block::newFromTarget( $target );
 910                                 if ( $block->equals( $currentBlock ) ) {
 911                                         return [ [ 'ipb_already_blocked', $block->getTarget() ] ];
 912                                 }
 913                                 # If the name was hidden and the blocking user cannot hide
 914                                 # names, then don't allow any block changes...
 915                                 if ( $currentBlock->mHideName && !$performer->isAllowed( 'hideuser' ) ) {
 916                                         return [ 'cant-see-hidden-user' ];
 917                                 }
 918
 919                                 $priorBlock = clone $currentBlock;
 920                                 $currentBlock->isHardblock( $block->isHardblock() );
 921                                 $currentBlock->prevents( 'createaccount', $block->prevents( 'createaccount' ) );
 922                                 $currentBlock->mExpiry = $block->mExpiry;
 923                                 $currentBlock->isAutoblocking( $block->isAutoblocking() );
 924                                 $currentBlock->mHideName = $block->mHideName;
 925                                 $currentBlock->prevents( 'sendemail', $block->prevents( 'sendemail' ) );
 926                                 $currentBlock->prevents( 'editownusertalk', $block->prevents( 'editownusertalk' ) );
 927                                 $currentBlock->mReason = $block->mReason;
 928
 929                                 if ( $enablePartialBlocks ) {
 930                                         // Maintain the sitewide status. If partial blocks is not enabled,
 931                                         // saving the block will result in a sitewide block.
 932                                         $currentBlock->isSitewide( $block->isSitewide() );
 933
 934                                         // Set the block id of the restrictions.
 935                                         $currentBlock->setRestrictions(
 936                                                 BlockRestriction::setBlockId( $currentBlock->getId(), $restrictions )
 937                                         );
 938                                 }
 939
 940                                 $status = $currentBlock->update();
 941                                 // TODO handle failure
 942
 943                                 $logaction = 'reblock';
 944
 945                                 # Unset _deleted fields if requested
 946                                 if ( $currentBlock->mHideName && !$data['HideUser'] ) {
 947                                         RevisionDeleteUser::unsuppressUserName( $target, $userId );
 948                                 }
 949
 950                                 # If hiding/unhiding a name, this should go in the private logs
 951                                 if ( (bool)$currentBlock->mHideName ) {
 952                                         $data['HideUser'] = true;
 953                                 }
 954
 955                                 $block = $currentBlock;
 956                         }
 957                 } else {
 958                         $logaction = 'block';
 959                 }
 960
 961                 Hooks::run( 'BlockIpComplete', [ $block, $performer, $priorBlock ] );
 962
 963                 # Set *_deleted fields if requested
 964                 if ( $data['HideUser'] ) {
 965                         RevisionDeleteUser::suppressUserName( $target, $userId );
 966                 }
 967
 968                 # Can't watch a rangeblock
 969                 if ( $type != Block::TYPE_RANGE && $data['Watch'] ) {
 970                         WatchAction::doWatch(
 971                                 Title::makeTitle( NS_USER, $target ),
 972                                 $performer,
 973                                 User::IGNORE_USER_RIGHTS
 974                         );
 975                 }
 976
 977                 # Block constructor sanitizes certain block options on insert
 978                 $data['BlockEmail'] = $block->prevents( 'sendemail' );
 979                 $data['AutoBlock'] = $block->isAutoblocking();
 980
 981                 # Prepare log parameters
 982                 $logParams = [];
 983                 $logParams['5::duration'] = $data['Expiry'];
 984                 $logParams['6::flags'] = self::blockLogFlags( $data, $type );
 985                 $logParams['sitewide'] = $block->isSitewide();
 986
 987                 if ( $enablePartialBlocks && !$block->isSitewide() ) {
 988                         if ( $data['PageRestrictions'] !== '' ) {
 989                                 $logParams['7::restrictions']['pages'] = explode( "\n", $data['PageRestrictions'] );
 990                         }
 991
 992                         if ( $data['NamespaceRestrictions'] !== '' ) {
 993                                 $logParams['7::restrictions']['namespaces'] = explode( "\n", $data['NamespaceRestrictions'] );
 994                         }
 995                 }
 996
 997                 # Make log entry, if the name is hidden, put it in the suppression log
 998                 $log_type = $data['HideUser'] ? 'suppress' : 'block';
 999                 $logEntry = new ManualLogEntry( $log_type, $logaction );
1000                 $logEntry->setTarget( Title::makeTitle( NS_USER, $target ) );
1001                 $logEntry->setComment( $data['Reason'][0] );
1002                 $logEntry->setPerformer( $performer );
1003                 $logEntry->setParameters( $logParams );
1004                 # Relate log ID to block ID (T27763)
1005                 $logEntry->setRelations( [ 'ipb_id' => $block->getId() ] );
1006                 $logId = $logEntry->insert();
1007
1008                 if ( !empty( $data['Tags'] ) ) {
1009                         $logEntry->setTags( $data['Tags'] );
1010                 }
1011
1012                 $logEntry->publish( $logId );
1013
1014                 return true;
1015         }
1016
1017         /**
1018          * Get an array of suggested block durations from MediaWiki:Ipboptions
1019          * @todo FIXME: This uses a rather odd syntax for the options, should it be converted
1020          *     to the standard "**<duration>|<displayname>" format?
1021          * @param Language|null $lang The language to get the durations in, or null to use
1022          *     the wiki's content language
1023          * @param bool $includeOther Whether to include the 'other' option in the list of
1024          *     suggestions
1025          * @return array
1026          */
1027         public static function getSuggestedDurations( Language $lang = null, $includeOther = true ) {
1028                 $a = [];
1029                 $msg = $lang === null
1030                         ? wfMessage( 'ipboptions' )->inContentLanguage()->text()
1031                         : wfMessage( 'ipboptions' )->inLanguage( $lang )->text();
1032
1033                 if ( $msg == '-' ) {
1034                         return [];
1035                 }
1036
1037                 foreach ( explode( ',', $msg ) as $option ) {
1038                         if ( strpos( $option, ':' ) === false ) {
1039                                 $option = "$option:$option";
1040                         }
1041
1042                         list( $show, $value ) = explode( ':', $option );
1043                         $a[$show] = $value;
1044                 }
1045
1046                 if ( $a && $includeOther ) {
1047                         // if options exist, add other to the end instead of the begining (which
1048                         // is what happens by default).
1049                         $a[ wfMessage( 'ipbother' )->text() ] = 'other';
1050                 }
1051
1052                 return $a;
1053         }
1054
1055         /**
1056          * Convert a submitted expiry time, which may be relative ("2 weeks", etc) or absolute
1057          * ("24 May 2034", etc), into an absolute timestamp we can put into the database.
1058          *
1059          * @todo strtotime() only accepts English strings. This means the expiry input
1060          *       can only be specified in English.
1061          * @see https://secure.php.net/manual/en/function.strtotime.php
1062          *
1063          * @param string $expiry Whatever was typed into the form
1064          * @return string|bool Timestamp or 'infinity' or false on error.
1065          */
1066         public static function parseExpiryInput( $expiry ) {
1067                 if ( wfIsInfinity( $expiry ) ) {
1068                         return 'infinity';
1069                 }
1070
1071                 $expiry = strtotime( $expiry );
1072
1073                 if ( $expiry < 0 || $expiry === false ) {
1074                         return false;
1075                 }
1076
1077                 return wfTimestamp( TS_MW, $expiry );
1078         }
1079
1080         /**
1081          * Can we do an email block?
1082          * @param User $user The sysop wanting to make a block
1083          * @return bool
1084          */
1085         public static function canBlockEmail( $user ) {
1086                 global $wgEnableUserEmail, $wgSysopEmailBans;
1087
1088                 return ( $wgEnableUserEmail && $wgSysopEmailBans && $user->isAllowed( 'blockemail' ) );
1089         }
1090
1091         /**
1092          * T17810: blocked admins should not be able to block/unblock
1093          * others, and probably shouldn't be able to unblock themselves
1094          * either.
1095          *
1096          * Exception: Users can block the user who blocked them, to reduce
1097          * advantage of a malicious account blocking all admins (T150826)
1098          *
1099          * @param User|int|string|null $target Target to block or unblock; could be a User object,
1100          *   or a user ID or username, or null when the target is not known yet (e.g. when
1101          *   displaying Special:Block)
1102          * @param User $performer User doing the request
1103          * @return bool|string True or error message key
1104          */
1105         public static function checkUnblockSelf( $target, User $performer ) {
1106                 if ( is_int( $target ) ) {
1107                         $target = User::newFromId( $target );
1108                 } elseif ( is_string( $target ) ) {
1109                         $target = User::newFromName( $target );
1110                 }
1111                 if ( $performer->isBlocked() ) {
1112                         if ( $target instanceof User && $target->getId() == $performer->getId() ) {
1113                                 # User is trying to unblock themselves
1114                                 if ( $performer->isAllowed( 'unblockself' ) ) {
1115                                         return true;
1116                                         # User blocked themselves and is now trying to reverse it
1117                                 } elseif ( $performer->blockedBy() === $performer->getName() ) {
1118                                         return true;
1119                                 } else {
1120                                         return 'ipbnounblockself';
1121                                 }
1122                         } elseif (
1123                                 $target instanceof User &&
1124                                 $performer->getBlock() instanceof Block &&
1125                                 $performer->getBlock()->getBy() &&
1126                                 $performer->getBlock()->getBy() === $target->getId()
1127                         ) {
1128                                 // Allow users to block the user that blocked them.
1129                                 // This is to prevent a situation where a malicious user
1130                                 // blocks all other users. This way, the non-malicious
1131                                 // user can block the malicious user back, resulting
1132                                 // in a stalemate.
1133                                 return true;
1134
1135                         } else {
1136                                 # User is trying to block/unblock someone else
1137                                 return 'ipbblocked';
1138                         }
1139                 } else {
1140                         return true;
1141                 }
1142         }
1143
1144         /**
1145          * Return a comma-delimited list of "flags" to be passed to the log
1146          * reader for this block, to provide more information in the logs
1147          * @param array $data From HTMLForm data
1148          * @param int $type Block::TYPE_ constant (USER, RANGE, or IP)
1149          * @return string
1150          */
1151         protected static function blockLogFlags( array $data, $type ) {
1152                 $config = RequestContext::getMain()->getConfig();
1153
1154                 $blockAllowsUTEdit = $config->get( 'BlockAllowsUTEdit' );
1155
1156                 $flags = [];
1157
1158                 # when blocking a user the option 'anononly' is not available/has no effect
1159                 # -> do not write this into log
1160                 if ( !$data['HardBlock'] && $type != Block::TYPE_USER ) {
1161                         // For grepping: message block-log-flags-anononly
1162                         $flags[] = 'anononly';
1163                 }
1164
1165                 if ( $data['CreateAccount'] ) {
1166                         // For grepping: message block-log-flags-nocreate
1167                         $flags[] = 'nocreate';
1168                 }
1169
1170                 # Same as anononly, this is not displayed when blocking an IP address
1171                 if ( !$data['AutoBlock'] && $type == Block::TYPE_USER ) {
1172                         // For grepping: message block-log-flags-noautoblock
1173                         $flags[] = 'noautoblock';
1174                 }
1175
1176                 if ( $data['DisableEmail'] ) {
1177                         // For grepping: message block-log-flags-noemail
1178                         $flags[] = 'noemail';
1179                 }
1180
1181                 if ( $blockAllowsUTEdit && $data['DisableUTEdit'] ) {
1182                         // For grepping: message block-log-flags-nousertalk
1183                         $flags[] = 'nousertalk';
1184                 }
1185
1186                 if ( $data['HideUser'] ) {
1187                         // For grepping: message block-log-flags-hiddenname
1188                         $flags[] = 'hiddenname';
1189                 }
1190
1191                 return implode( ',', $flags );
1192         }
1193
1194         /**
1195          * Process the form on POST submission.
1196          * @param array $data
1197          * @param HTMLForm|null $form
1198          * @return bool|array True for success, false for didn't-try, array of errors on failure
1199          */
1200         public function onSubmit( array $data, HTMLForm $form = null ) {
1201                 // If "Editing" checkbox is unchecked, the block must be a partial block affecting
1202                 // actions other than editing, and there must be no restrictions.
1203                 if ( isset( $data['Editing'] ) && $data['Editing'] === false ) {
1204                         $data['EditingRestriction'] = 'partial';
1205                         $data['PageRestrictions'] = '';
1206                         $data['NamespaceRestrictions'] = '';
1207                 }
1208                 return self::processForm( $data, $form->getContext() );
1209         }
1210
1211         /**
1212          * Do something exciting on successful processing of the form, most likely to show a
1213          * confirmation message
1214          */
1215         public function onSuccess() {
1216                 $out = $this->getOutput();
1217                 $out->setPageTitle( $this->msg( 'blockipsuccesssub' ) );
1218                 $out->addWikiMsg( 'blockipsuccesstext', wfEscapeWikiText( $this->target ) );
1219         }
1220
1221         /**
1222          * Return an array of subpages beginning with $search that this special page will accept.
1223          *
1224          * @param string $search Prefix to search for
1225          * @param int $limit Maximum number of results to return (usually 10)
1226          * @param int $offset Number of results to skip (usually 0)
1227          * @return string[] Matching subpages
1228          */
1229         public function prefixSearchSubpages( $search, $limit, $offset ) {
1230                 $user = User::newFromName( $search );
1231                 if ( !$user ) {
1232                         // No prefix suggestion for invalid user
1233                         return [];
1234                 }
1235                 // Autocomplete subpage as user list - public to allow caching
1236                 return UserNamePrefixSearch::search( 'public', $search, $limit, $offset );
1237         }
1238
1239         protected function getGroupName() {
1240                 return 'users';
1241         }
1242 }