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
  27 /**
  28  * A special page that allows users with 'block' right to block users from
  29  * editing pages and other actions
  30  *
  31  * @ingroup SpecialPage
  32  */
  33 class SpecialBlock extends FormSpecialPage {
  34         /** @var User|string|null User to be blocked, as passed either by parameter (url?wpTarget=Foo)
  35          * or as subpage (Special:Block/Foo) */
  36         protected $target;
  37
  38         /** @var int Block::TYPE_ constant */
  39         protected $type;
  40
  41         /** @var User|string The previous block target */
  42         protected $previousTarget;
  43
  44         /** @var bool Whether the previous submission of the form asked for HideUser */
  45         protected $requestedHideUser;
  46
  47         /** @var bool */
  48         protected $alreadyBlocked;
  49
  50         /** @var array */
  51         protected $preErrors = [];
  52
  53         public function __construct() {
  54                 parent::__construct( 'Block', 'block' );
  55         }
  56
  57         public function doesWrites() {
  58                 return true;
  59         }
  60
  61         /**
  62          * Checks that the user can unblock themselves if they are trying to do so
  63          *
  64          * @param User $user
  65          * @throws ErrorPageError
  66          */
  67         protected function checkExecutePermissions( User $user ) {
  68                 parent::checkExecutePermissions( $user );
  69                 # T17810: blocked admins should have limited access here
  70                 $status = self::checkUnblockSelf( $this->target, $user );
  71                 if ( $status !== true ) {
  72                         throw new ErrorPageError( 'badaccess', $status );
  73                 }
  74         }
  75
  76         /**
  77          * We allow certain special cases where user is blocked
  78          *
  79          * @return bool
  80          */
  81         public function requiresUnblock() {
  82                 return false;
  83         }
  84
  85         /**
  86          * Handle some magic here
  87          *
  88          * @param string $par
  89          */
  90         protected function setParameter( $par ) {
  91                 # Extract variables from the request.  Try not to get into a situation where we
  92                 # need to extract *every* variable from the form just for processing here, but
  93                 # there are legitimate uses for some variables
  94                 $request = $this->getRequest();
  95                 list( $this->target, $this->type ) = self::getTargetAndType( $par, $request );
  96                 if ( $this->target instanceof User ) {
  97                         # Set the 'relevant user' in the skin, so it displays links like Contributions,
  98                         # User logs, UserRights, etc.
  99                         $this->getSkin()->setRelevantUser( $this->target );
 100                 }
 101
 102                 list( $this->previousTarget, /*...*/ ) =
 103                         Block::parseTarget( $request->getVal( 'wpPreviousTarget' ) );
 104                 $this->requestedHideUser = $request->getBool( 'wpHideUser' );
 105         }
 106
 107         /**
 108          * Customizes the HTMLForm a bit
 109          *
 110          * @param HTMLForm $form
 111          */
 112         protected function alterForm( HTMLForm $form ) {
 113                 $form->setHeaderText( '' );
 114                 $form->setSubmitDestructive();
 115
 116                 $msg = $this->alreadyBlocked ? 'ipb-change-block' : 'ipbsubmit';
 117                 $form->setSubmitTextMsg( $msg );
 118
 119                 $this->addHelpLink( 'Help:Blocking users' );
 120
 121                 # Don't need to do anything if the form has been posted
 122                 if ( !$this->getRequest()->wasPosted() && $this->preErrors ) {
 123                         $s = $form->formatErrors( $this->preErrors );
 124                         if ( $s ) {
 125                                 $form->addHeaderText( Html::rawElement(
 126                                         'div',
 127                                         [ 'class' => 'error' ],
 128                                         $s
 129                                 ) );
 130                         }
 131                 }
 132         }
 133
 134         protected function getDisplayFormat() {
 135                 return 'ooui';
 136         }
 137
 138         /**
 139          * Get the HTMLForm descriptor array for the block form
 140          * @return array
 141          */
 142         protected function getFormFields() {
 143                 global $wgBlockAllowsUTEdit;
 144
 145                 $user = $this->getUser();
 146
 147                 $suggestedDurations = self::getSuggestedDurations();
 148
 149                 $conf = $this->getConfig();
 150                 $oldCommentSchema = $conf->get( 'CommentTableSchemaMigrationStage' ) === MIGRATION_OLD;
 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-page-restrictions',
 191                                 'showMissing' => false,
 192                                 'input' => [
 193                                         'autocomplete' => false
 194                                 ],
 195                                 'section' => 'actions',
 196                         ];
 197                 }
 198
 199                 $a['CreateAccount'] = [
 200                         'type' => 'check',
 201                         'label-message' => 'ipbcreateaccount',
 202                         'default' => true,
 203                         'section' => 'actions',
 204                 ];
 205
 206                 if ( self::canBlockEmail( $user ) ) {
 207                         $a['DisableEmail'] = [
 208                                 'type' => 'check',
 209                                 'label-message' => 'ipbemailban',
 210                                 'section' => 'actions',
 211                         ];
 212                 }
 213
 214                 if ( $wgBlockAllowsUTEdit ) {
 215                         $a['DisableUTEdit'] = [
 216                                 'type' => 'check',
 217                                 'label-message' => 'ipb-disableusertalk',
 218                                 'default' => false,
 219                                 'section' => 'actions',
 220                         ];
 221                 }
 222
 223                 $a['Expiry'] = [
 224                         'type' => 'expiry',
 225                         'required' => true,
 226                         'options' => $suggestedDurations,
 227                         'default' => $this->msg( 'ipb-default-expiry' )->inContentLanguage()->text(),
 228                         'section' => 'expiry',
 229                 ];
 230
 231                 $a['Reason'] = [
 232                         'type' => 'selectandother',
 233                         // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
 234                         // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
 235                         // Unicode codepoints (or 255 UTF-8 bytes for old schema).
 236                         'maxlength' => $oldCommentSchema ? 255 : CommentStore::COMMENT_CHARACTER_LIMIT,
 237                         'maxlength-unit' => 'codepoints',
 238                         'options-message' => 'ipbreason-dropdown',
 239                         'section' => 'reason',
 240                 ];
 241
 242                 $a['AutoBlock'] = [
 243                         'type' => 'check',
 244                         'label-message' => 'ipbenableautoblock',
 245                         'default' => true,
 246                         'section' => 'options',
 247                 ];
 248
 249                 # Allow some users to hide name from block log, blocklist and listusers
 250                 if ( $user->isAllowed( 'hideuser' ) ) {
 251                         $a['HideUser'] = [
 252                                 'type' => 'check',
 253                                 'label-message' => 'ipbhidename',
 254                                 'cssclass' => 'mw-block-hideuser',
 255                                 'section' => 'options',
 256                         ];
 257                 }
 258
 259                 # Watchlist their user page? (Only if user is logged in)
 260                 if ( $user->isLoggedIn() ) {
 261                         $a['Watch'] = [
 262                                 'type' => 'check',
 263                                 'label-message' => 'ipbwatchuser',
 264                                 'section' => 'options',
 265                         ];
 266                 }
 267
 268                 $a['HardBlock'] = [
 269                         'type' => 'check',
 270                         'label-message' => 'ipb-hardblock',
 271                         'default' => false,
 272                         'section' => 'options',
 273                 ];
 274
 275                 # This is basically a copy of the Target field, but the user can't change it, so we
 276                 # can see if the warnings we maybe showed to the user before still apply
 277                 $a['PreviousTarget'] = [
 278                         'type' => 'hidden',
 279                         'default' => false,
 280                 ];
 281
 282                 # We'll turn this into a checkbox if we need to
 283                 $a['Confirm'] = [
 284                         'type' => 'hidden',
 285                         'default' => '',
 286                         'label-message' => 'ipb-confirm',
 287                         'cssclass' => 'mw-block-confirm',
 288                 ];
 289
 290                 $this->maybeAlterFormDefaults( $a );
 291
 292                 // Allow extensions to add more fields
 293                 Hooks::run( 'SpecialBlockModifyFormFields', [ $this, &$a ] );
 294
 295                 return $a;
 296         }
 297
 298         /**
 299          * If the user has already been blocked with similar settings, load that block
 300          * and change the defaults for the form fields to match the existing settings.
 301          * @param array &$fields HTMLForm descriptor array
 302          * @return bool Whether fields were altered (that is, whether the target is
 303          *     already blocked)
 304          */
 305         protected function maybeAlterFormDefaults( &$fields ) {
 306                 # This will be overwritten by request data
 307                 $fields['Target']['default'] = (string)$this->target;
 308
 309                 if ( $this->target ) {
 310                         $status = self::validateTarget( $this->target, $this->getUser() );
 311                         if ( !$status->isOK() ) {
 312                                 $errors = $status->getErrorsArray();
 313                                 $this->preErrors = array_merge( $this->preErrors, $errors );
 314                         }
 315                 }
 316
 317                 # This won't be
 318                 $fields['PreviousTarget']['default'] = (string)$this->target;
 319
 320                 $block = Block::newFromTarget( $this->target );
 321
 322                 if ( $block instanceof Block && !$block->mAuto # The block exists and isn't an autoblock
 323                         && ( $this->type != Block::TYPE_RANGE # The block isn't a rangeblock
 324                                 || $block->getTarget() == $this->target ) # or if it is, the range is what we're about to block
 325                 ) {
 326                         $fields['HardBlock']['default'] = $block->isHardblock();
 327                         $fields['CreateAccount']['default'] = $block->prevents( 'createaccount' );
 328                         $fields['AutoBlock']['default'] = $block->isAutoblocking();
 329
 330                         if ( isset( $fields['DisableEmail'] ) ) {
 331                                 $fields['DisableEmail']['default'] = $block->prevents( 'sendemail' );
 332                         }
 333
 334                         if ( isset( $fields['HideUser'] ) ) {
 335                                 $fields['HideUser']['default'] = $block->mHideName;
 336                         }
 337
 338                         if ( isset( $fields['DisableUTEdit'] ) ) {
 339                                 $fields['DisableUTEdit']['default'] = $block->prevents( 'editownusertalk' );
 340                         }
 341
 342                         // If the username was hidden (ipb_deleted == 1), don't show the reason
 343                         // unless this user also has rights to hideuser: T37839
 344                         if ( !$block->mHideName || $this->getUser()->isAllowed( 'hideuser' ) ) {
 345                                 $fields['Reason']['default'] = $block->mReason;
 346                         } else {
 347                                 $fields['Reason']['default'] = '';
 348                         }
 349
 350                         if ( $this->getRequest()->wasPosted() ) {
 351                                 # Ok, so we got a POST submission asking us to reblock a user.  So show the
 352                                 # confirm checkbox; the user will only see it if they haven't previously
 353                                 $fields['Confirm']['type'] = 'check';
 354                         } else {
 355                                 # We got a target, but it wasn't a POST request, so the user must have gone
 356                                 # to a link like [[Special:Block/User]].  We don't need to show the checkbox
 357                                 # as long as they go ahead and block *that* user
 358                                 $fields['Confirm']['default'] = 1;
 359                         }
 360
 361                         if ( $block->mExpiry == 'infinity' ) {
 362                                 $fields['Expiry']['default'] = 'infinite';
 363                         } else {
 364                                 $fields['Expiry']['default'] = wfTimestamp( TS_RFC2822, $block->mExpiry );
 365                         }
 366
 367                         $this->alreadyBlocked = true;
 368                         $this->preErrors[] = [ 'ipb-needreblock', wfEscapeWikiText( (string)$block->getTarget() ) ];
 369                 }
 370
 371                 # We always need confirmation to do HideUser
 372                 if ( $this->requestedHideUser ) {
 373                         $fields['Confirm']['type'] = 'check';
 374                         unset( $fields['Confirm']['default'] );
 375                         $this->preErrors[] = [ 'ipb-confirmhideuser', 'ipb-confirmaction' ];
 376                 }
 377
 378                 # Or if the user is trying to block themselves
 379                 if ( (string)$this->target === $this->getUser()->getName() ) {
 380                         $fields['Confirm']['type'] = 'check';
 381                         unset( $fields['Confirm']['default'] );
 382                         $this->preErrors[] = [ 'ipb-blockingself', 'ipb-confirmaction' ];
 383                 }
 384
 385                 if ( $this->getConfig()->get( 'EnablePartialBlocks' ) ) {
 386                         if ( $block instanceof Block && !$block->isSitewide() ) {
 387                                 $fields['EditingRestriction']['default'] = 'partial';
 388                         } else {
 389                                 $fields['EditingRestriction']['default'] = 'sitewide';
 390                         }
 391
 392                         if ( $block instanceof Block ) {
 393                                 $pageRestrictions = [];
 394                                 foreach ( $block->getRestrictions() as $restriction ) {
 395                                         if ( $restriction->getType() !== 'page' ) {
 396                                                 continue;
 397                                         }
 398
 399                                         $pageRestrictions[] = $restriction->getTitle()->getPrefixedText();
 400                                 }
 401
 402                                 // Sort the restrictions so they are in alphabetical order.
 403                                 sort( $pageRestrictions );
 404                                 $fields['PageRestrictions']['default'] = implode( "\n", $pageRestrictions );
 405                         }
 406                 }
 407         }
 408
 409         /**
 410          * Add header elements like block log entries, etc.
 411          * @return string
 412          */
 413         protected function preText() {
 414                 $this->getOutput()->addModuleStyles( [
 415                         'mediawiki.widgets.TagMultiselectWidget.styles',
 416                         'mediawiki.special',
 417                 ] );
 418                 $this->getOutput()->addModules( [ 'mediawiki.special.block' ] );
 419
 420                 $blockCIDRLimit = $this->getConfig()->get( 'BlockCIDRLimit' );
 421                 $text = $this->msg( 'blockiptext', $blockCIDRLimit['IPv4'], $blockCIDRLimit['IPv6'] )->parse();
 422
 423                 $otherBlockMessages = [];
 424                 if ( $this->target !== null ) {
 425                         $targetName = $this->target;
 426                         if ( $this->target instanceof User ) {
 427                                 $targetName = $this->target->getName();
 428                         }
 429                         # Get other blocks, i.e. from GlobalBlocking or TorBlock extension
 430                         Hooks::run( 'OtherBlockLogLink', [ &$otherBlockMessages, $targetName ] );
 431
 432                         if ( count( $otherBlockMessages ) ) {
 433                                 $s = Html::rawElement(
 434                                         'h2',
 435                                         [],
 436                                         $this->msg( 'ipb-otherblocks-header', count( $otherBlockMessages ) )->parse()
 437                                 ) . "\n";
 438
 439                                 $list = '';
 440
 441                                 foreach ( $otherBlockMessages as $link ) {
 442                                         $list .= Html::rawElement( 'li', [], $link ) . "\n";
 443                                 }
 444
 445                                 $s .= Html::rawElement(
 446                                         'ul',
 447                                         [ 'class' => 'mw-blockip-alreadyblocked' ],
 448                                         $list
 449                                 ) . "\n";
 450
 451                                 $text .= $s;
 452                         }
 453                 }
 454
 455                 return $text;
 456         }
 457
 458         /**
 459          * Add footer elements to the form
 460          * @return string
 461          */
 462         protected function postText() {
 463                 $links = [];
 464
 465                 $this->getOutput()->addModuleStyles( 'mediawiki.special' );
 466
 467                 $linkRenderer = $this->getLinkRenderer();
 468                 # Link to the user's contributions, if applicable
 469                 if ( $this->target instanceof User ) {
 470                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $this->target->getName() );
 471                         $links[] = $linkRenderer->makeLink(
 472                                 $contribsPage,
 473                                 $this->msg( 'ipb-blocklist-contribs', $this->target->getName() )->text()
 474                         );
 475                 }
 476
 477                 # Link to unblock the specified user, or to a blank unblock form
 478                 if ( $this->target instanceof User ) {
 479                         $message = $this->msg(
 480                                 'ipb-unblock-addr',
 481                                 wfEscapeWikiText( $this->target->getName() )
 482                         )->parse();
 483                         $list = SpecialPage::getTitleFor( 'Unblock', $this->target->getName() );
 484                 } else {
 485                         $message = $this->msg( 'ipb-unblock' )->parse();
 486                         $list = SpecialPage::getTitleFor( 'Unblock' );
 487                 }
 488                 $links[] = $linkRenderer->makeKnownLink(
 489                         $list,
 490                         new HtmlArmor( $message )
 491                 );
 492
 493                 # Link to the block list
 494                 $links[] = $linkRenderer->makeKnownLink(
 495                         SpecialPage::getTitleFor( 'BlockList' ),
 496                         $this->msg( 'ipb-blocklist' )->text()
 497                 );
 498
 499                 $user = $this->getUser();
 500
 501                 # Link to edit the block dropdown reasons, if applicable
 502                 if ( $user->isAllowed( 'editinterface' ) ) {
 503                         $links[] = $linkRenderer->makeKnownLink(
 504                                 $this->msg( 'ipbreason-dropdown' )->inContentLanguage()->getTitle(),
 505                                 $this->msg( 'ipb-edit-dropdown' )->text(),
 506                                 [],
 507                                 [ 'action' => 'edit' ]
 508                         );
 509                 }
 510
 511                 $text = Html::rawElement(
 512                         'p',
 513                         [ 'class' => 'mw-ipb-conveniencelinks' ],
 514                         $this->getLanguage()->pipeList( $links )
 515                 );
 516
 517                 $userTitle = self::getTargetUserTitle( $this->target );
 518                 if ( $userTitle ) {
 519                         # Get relevant extracts from the block and suppression logs, if possible
 520                         $out = '';
 521
 522                         LogEventsList::showLogExtract(
 523                                 $out,
 524                                 'block',
 525                                 $userTitle,
 526                                 '',
 527                                 [
 528                                         'lim' => 10,
 529                                         'msgKey' => [ 'blocklog-showlog', $userTitle->getText() ],
 530                                         'showIfEmpty' => false
 531                                 ]
 532                         );
 533                         $text .= $out;
 534
 535                         # Add suppression block entries if allowed
 536                         if ( $user->isAllowed( 'suppressionlog' ) ) {
 537                                 LogEventsList::showLogExtract(
 538                                         $out,
 539                                         'suppress',
 540                                         $userTitle,
 541                                         '',
 542                                         [
 543                                                 'lim' => 10,
 544                                                 'conds' => [ 'log_action' => [ 'block', 'reblock', 'unblock' ] ],
 545                                                 'msgKey' => [ 'blocklog-showsuppresslog', $userTitle->getText() ],
 546                                                 'showIfEmpty' => false
 547                                         ]
 548                                 );
 549
 550                                 $text .= $out;
 551                         }
 552                 }
 553
 554                 return $text;
 555         }
 556
 557         /**
 558          * Get a user page target for things like logs.
 559          * This handles account and IP range targets.
 560          * @param User|string $target
 561          * @return Title|null
 562          */
 563         protected static function getTargetUserTitle( $target ) {
 564                 if ( $target instanceof User ) {
 565                         return $target->getUserPage();
 566                 } elseif ( IP::isIPAddress( $target ) ) {
 567                         return Title::makeTitleSafe( NS_USER, $target );
 568                 }
 569
 570                 return null;
 571         }
 572
 573         /**
 574          * Determine the target of the block, and the type of target
 575          * @todo Should be in Block.php?
 576          * @param string $par Subpage parameter passed to setup, or data value from
 577          *     the HTMLForm
 578          * @param WebRequest|null $request Optionally try and get data from a request too
 579          * @return array [ User|string|null, Block::TYPE_ constant|null ]
 580          */
 581         public static function getTargetAndType( $par, WebRequest $request = null ) {
 582                 $i = 0;
 583                 $target = null;
 584
 585                 while ( true ) {
 586                         switch ( $i++ ) {
 587                                 case 0:
 588                                         # The HTMLForm will check wpTarget first and only if it doesn't get
 589                                         # a value use the default, which will be generated from the options
 590                                         # below; so this has to have a higher precedence here than $par, or
 591                                         # we could end up with different values in $this->target and the HTMLForm!
 592                                         if ( $request instanceof WebRequest ) {
 593                                                 $target = $request->getText( 'wpTarget', null );
 594                                         }
 595                                         break;
 596                                 case 1:
 597                                         $target = $par;
 598                                         break;
 599                                 case 2:
 600                                         if ( $request instanceof WebRequest ) {
 601                                                 $target = $request->getText( 'ip', null );
 602                                         }
 603                                         break;
 604                                 case 3:
 605                                         # B/C @since 1.18
 606                                         if ( $request instanceof WebRequest ) {
 607                                                 $target = $request->getText( 'wpBlockAddress', null );
 608                                         }
 609                                         break;
 610                                 case 4:
 611                                         break 2;
 612                         }
 613
 614                         list( $target, $type ) = Block::parseTarget( $target );
 615
 616                         if ( $type !== null ) {
 617                                 return [ $target, $type ];
 618                         }
 619                 }
 620
 621                 return [ null, null ];
 622         }
 623
 624         /**
 625          * HTMLForm field validation-callback for Target field.
 626          * @since 1.18
 627          * @param string $value
 628          * @param array $alldata
 629          * @param HTMLForm $form
 630          * @return Message
 631          */
 632         public static function validateTargetField( $value, $alldata, $form ) {
 633                 $status = self::validateTarget( $value, $form->getUser() );
 634                 if ( !$status->isOK() ) {
 635                         $errors = $status->getErrorsArray();
 636
 637                         return $form->msg( ...$errors[0] );
 638                 } else {
 639                         return true;
 640                 }
 641         }
 642
 643         /**
 644          * Validate a block target.
 645          *
 646          * @since 1.21
 647          * @param string $value Block target to check
 648          * @param User $user Performer of the block
 649          * @return Status
 650          */
 651         public static function validateTarget( $value, User $user ) {
 652                 global $wgBlockCIDRLimit;
 653
 654                 /** @var User $target */
 655                 list( $target, $type ) = self::getTargetAndType( $value );
 656                 $status = Status::newGood( $target );
 657
 658                 if ( $type == Block::TYPE_USER ) {
 659                         if ( $target->isAnon() ) {
 660                                 $status->fatal(
 661                                         'nosuchusershort',
 662                                         wfEscapeWikiText( $target->getName() )
 663                                 );
 664                         }
 665
 666                         $unblockStatus = self::checkUnblockSelf( $target, $user );
 667                         if ( $unblockStatus !== true ) {
 668                                 $status->fatal( 'badaccess', $unblockStatus );
 669                         }
 670                 } elseif ( $type == Block::TYPE_RANGE ) {
 671                         list( $ip, $range ) = explode( '/', $target, 2 );
 672
 673                         if (
 674                                 ( IP::isIPv4( $ip ) && $wgBlockCIDRLimit['IPv4'] == 32 ) ||
 675                                 ( IP::isIPv6( $ip ) && $wgBlockCIDRLimit['IPv6'] == 128 )
 676                         ) {
 677                                 // Range block effectively disabled
 678                                 $status->fatal( 'range_block_disabled' );
 679                         }
 680
 681                         if (
 682                                 ( IP::isIPv4( $ip ) && $range > 32 ) ||
 683                                 ( IP::isIPv6( $ip ) && $range > 128 )
 684                         ) {
 685                                 // Dodgy range
 686                                 $status->fatal( 'ip_range_invalid' );
 687                         }
 688
 689                         if ( IP::isIPv4( $ip ) && $range < $wgBlockCIDRLimit['IPv4'] ) {
 690                                 $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv4'] );
 691                         }
 692
 693                         if ( IP::isIPv6( $ip ) && $range < $wgBlockCIDRLimit['IPv6'] ) {
 694                                 $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv6'] );
 695                         }
 696                 } elseif ( $type == Block::TYPE_IP ) {
 697                         # All is well
 698                 } else {
 699                         $status->fatal( 'badipaddress' );
 700                 }
 701
 702                 return $status;
 703         }
 704
 705         /**
 706          * Given the form data, actually implement a block. This is also called from ApiBlock.
 707          *
 708          * @param array $data
 709          * @param IContextSource $context
 710          * @return bool|string
 711          */
 712         public static function processForm( array $data, IContextSource $context ) {
 713                 global $wgBlockAllowsUTEdit, $wgHideUserContribLimit;
 714
 715                 $performer = $context->getUser();
 716                 $enablePartialBlocks = $context->getConfig()->get( 'EnablePartialBlocks' );
 717
 718                 // Handled by field validator callback
 719                 // self::validateTargetField( $data['Target'] );
 720
 721                 # This might have been a hidden field or a checkbox, so interesting data
 722                 # can come from it
 723                 $data['Confirm'] = !in_array( $data['Confirm'], [ '', '0', null, false ], true );
 724
 725                 /** @var User $target */
 726                 list( $target, $type ) = self::getTargetAndType( $data['Target'] );
 727                 if ( $type == Block::TYPE_USER ) {
 728                         $user = $target;
 729                         $target = $user->getName();
 730                         $userId = $user->getId();
 731
 732                         # Give admins a heads-up before they go and block themselves.  Much messier
 733                         # to do this for IPs, but it's pretty unlikely they'd ever get the 'block'
 734                         # permission anyway, although the code does allow for it.
 735                         # Note: Important to use $target instead of $data['Target']
 736                         # since both $data['PreviousTarget'] and $target are normalized
 737                         # but $data['target'] gets overridden by (non-normalized) request variable
 738                         # from previous request.
 739                         if ( $target === $performer->getName() &&
 740                                 ( $data['PreviousTarget'] !== $target || !$data['Confirm'] )
 741                         ) {
 742                                 return [ 'ipb-blockingself', 'ipb-confirmaction' ];
 743                         }
 744                 } elseif ( $type == Block::TYPE_RANGE ) {
 745                         $user = null;
 746                         $userId = 0;
 747                 } elseif ( $type == Block::TYPE_IP ) {
 748                         $user = null;
 749                         $target = $target->getName();
 750                         $userId = 0;
 751                 } else {
 752                         # This should have been caught in the form field validation
 753                         return [ 'badipaddress' ];
 754                 }
 755
 756                 $expiryTime = self::parseExpiryInput( $data['Expiry'] );
 757
 758                 if (
 759                         // an expiry time is needed
 760                         ( strlen( $data['Expiry'] ) == 0 ) ||
 761                         // can't be a larger string as 50 (it should be a time format in any way)
 762                         ( strlen( $data['Expiry'] ) > 50 ) ||
 763                         // check, if the time could be parsed
 764                         !$expiryTime
 765                 ) {
 766                         return [ 'ipb_expiry_invalid' ];
 767                 }
 768
 769                 // an expiry time should be in the future, not in the
 770                 // past (wouldn't make any sense) - bug T123069
 771                 if ( $expiryTime < wfTimestampNow() ) {
 772                         return [ 'ipb_expiry_old' ];
 773                 }
 774
 775                 if ( !isset( $data['DisableEmail'] ) ) {
 776                         $data['DisableEmail'] = false;
 777                 }
 778
 779                 # If the user has done the form 'properly', they won't even have been given the
 780                 # option to suppress-block unless they have the 'hideuser' permission
 781                 if ( !isset( $data['HideUser'] ) ) {
 782                         $data['HideUser'] = false;
 783                 }
 784
 785                 if ( $data['HideUser'] ) {
 786                         if ( !$performer->isAllowed( 'hideuser' ) ) {
 787                                 # this codepath is unreachable except by a malicious user spoofing forms,
 788                                 # or by race conditions (user has hideuser and block rights, loads block form,
 789                                 # and loses hideuser rights before submission); so need to fail completely
 790                                 # rather than just silently disable hiding
 791                                 return [ 'badaccess-group0' ];
 792                         }
 793
 794                         # Recheck params here...
 795                         if ( $type != Block::TYPE_USER ) {
 796                                 $data['HideUser'] = false; # IP users should not be hidden
 797                         } elseif ( !wfIsInfinity( $data['Expiry'] ) ) {
 798                                 # Bad expiry.
 799                                 return [ 'ipb_expiry_temp' ];
 800                         } elseif ( $wgHideUserContribLimit !== false
 801                                 && $user->getEditCount() > $wgHideUserContribLimit
 802                         ) {
 803                                 # Typically, the user should have a handful of edits.
 804                                 # Disallow hiding users with many edits for performance.
 805                                 return [ [ 'ipb_hide_invalid',
 806                                         Message::numParam( $wgHideUserContribLimit ) ] ];
 807                         } elseif ( !$data['Confirm'] ) {
 808                                 return [ 'ipb-confirmhideuser', 'ipb-confirmaction' ];
 809                         }
 810                 }
 811
 812                 # Create block object.
 813                 $block = new Block();
 814                 $block->setTarget( $target );
 815                 $block->setBlocker( $performer );
 816                 $block->mReason = $data['Reason'][0];
 817                 $block->mExpiry = $expiryTime;
 818                 $block->prevents( 'createaccount', $data['CreateAccount'] );
 819                 $block->prevents( 'editownusertalk', ( !$wgBlockAllowsUTEdit || $data['DisableUTEdit'] ) );
 820                 $block->prevents( 'sendemail', $data['DisableEmail'] );
 821                 $block->isHardblock( $data['HardBlock'] );
 822                 $block->isAutoblocking( $data['AutoBlock'] );
 823                 $block->mHideName = $data['HideUser'];
 824
 825                 if (
 826                         $enablePartialBlocks &&
 827                         isset( $data['EditingRestriction'] ) &&
 828                         $data['EditingRestriction'] === 'partial'
 829                  ) {
 830                          $block->isSitewide( false );
 831                 }
 832
 833                 $reason = [ 'hookaborted' ];
 834                 if ( !Hooks::run( 'BlockIp', [ &$block, &$performer, &$reason ] ) ) {
 835                         return $reason;
 836                 }
 837
 838                 $restrictions = [];
 839                 if ( $enablePartialBlocks ) {
 840                         if ( !empty( $data['PageRestrictions'] ) ) {
 841                                 $restrictions = array_map( function ( $text ) {
 842                                         $title = Title::newFromText( $text );
 843                                         // Use the link cache since the title has already been loaded when
 844                                         // the field was validated.
 845                                         $restriction = new PageRestriction( 0, $title->getArticleId() );
 846                                         $restriction->setTitle( $title );
 847                                         return $restriction;
 848                                 }, explode( "\n", $data['PageRestrictions'] ) );
 849                         }
 850
 851                         $block->setRestrictions( $restrictions );
 852                 }
 853
 854                 $priorBlock = null;
 855                 # Try to insert block. Is there a conflicting block?
 856                 $status = $block->insert();
 857                 if ( !$status ) {
 858                         # Indicates whether the user is confirming the block and is aware of
 859                         # the conflict (did not change the block target in the meantime)
 860                         $blockNotConfirmed = !$data['Confirm'] || ( array_key_exists( 'PreviousTarget', $data )
 861                                 && $data['PreviousTarget'] !== $target );
 862
 863                         # Special case for API - T34434
 864                         $reblockNotAllowed = ( array_key_exists( 'Reblock', $data ) && !$data['Reblock'] );
 865
 866                         # Show form unless the user is already aware of this...
 867                         if ( $blockNotConfirmed || $reblockNotAllowed ) {
 868                                 return [ [ 'ipb_already_blocked', $block->getTarget() ] ];
 869                                 # Otherwise, try to update the block...
 870                         } else {
 871                                 # This returns direct blocks before autoblocks/rangeblocks, since we should
 872                                 # be sure the user is blocked by now it should work for our purposes
 873                                 $currentBlock = Block::newFromTarget( $target );
 874                                 if ( $block->equals( $currentBlock ) ) {
 875                                         return [ [ 'ipb_already_blocked', $block->getTarget() ] ];
 876                                 }
 877                                 # If the name was hidden and the blocking user cannot hide
 878                                 # names, then don't allow any block changes...
 879                                 if ( $currentBlock->mHideName && !$performer->isAllowed( 'hideuser' ) ) {
 880                                         return [ 'cant-see-hidden-user' ];
 881                                 }
 882
 883                                 $priorBlock = clone $currentBlock;
 884                                 $currentBlock->isHardblock( $block->isHardblock() );
 885                                 $currentBlock->prevents( 'createaccount', $block->prevents( 'createaccount' ) );
 886                                 $currentBlock->mExpiry = $block->mExpiry;
 887                                 $currentBlock->isAutoblocking( $block->isAutoblocking() );
 888                                 $currentBlock->mHideName = $block->mHideName;
 889                                 $currentBlock->prevents( 'sendemail', $block->prevents( 'sendemail' ) );
 890                                 $currentBlock->prevents( 'editownusertalk', $block->prevents( 'editownusertalk' ) );
 891                                 $currentBlock->mReason = $block->mReason;
 892
 893                                 if ( $enablePartialBlocks ) {
 894                                         // Maintain the sitewide status. If partial blocks is not enabled,
 895                                         // saving the block will result in a sitewide block.
 896                                         $currentBlock->isSitewide( $block->isSitewide() );
 897
 898                                         // Set the block id of the restrictions.
 899                                         $currentBlock->setRestrictions(
 900                                                 BlockRestriction::setBlockId( $currentBlock->getId(), $restrictions )
 901                                         );
 902                                 }
 903
 904                                 $status = $currentBlock->update();
 905                                 // TODO handle failure
 906
 907                                 $logaction = 'reblock';
 908
 909                                 # Unset _deleted fields if requested
 910                                 if ( $currentBlock->mHideName && !$data['HideUser'] ) {
 911                                         RevisionDeleteUser::unsuppressUserName( $target, $userId );
 912                                 }
 913
 914                                 # If hiding/unhiding a name, this should go in the private logs
 915                                 if ( (bool)$currentBlock->mHideName ) {
 916                                         $data['HideUser'] = true;
 917                                 }
 918
 919                                 $block = $currentBlock;
 920                         }
 921                 } else {
 922                         $logaction = 'block';
 923                 }
 924
 925                 Hooks::run( 'BlockIpComplete', [ $block, $performer, $priorBlock ] );
 926
 927                 # Set *_deleted fields if requested
 928                 if ( $data['HideUser'] ) {
 929                         RevisionDeleteUser::suppressUserName( $target, $userId );
 930                 }
 931
 932                 # Can't watch a rangeblock
 933                 if ( $type != Block::TYPE_RANGE && $data['Watch'] ) {
 934                         WatchAction::doWatch(
 935                                 Title::makeTitle( NS_USER, $target ),
 936                                 $performer,
 937                                 User::IGNORE_USER_RIGHTS
 938                         );
 939                 }
 940
 941                 # Block constructor sanitizes certain block options on insert
 942                 $data['BlockEmail'] = $block->prevents( 'sendemail' );
 943                 $data['AutoBlock'] = $block->isAutoblocking();
 944
 945                 # Prepare log parameters
 946                 $logParams = [];
 947                 $logParams['5::duration'] = $data['Expiry'];
 948                 $logParams['6::flags'] = self::blockLogFlags( $data, $type );
 949                 $logParams['sitewide'] = $block->isSitewide();
 950
 951                 if ( $enablePartialBlocks && !empty( $data['PageRestrictions'] ) ) {
 952                         $logParams['7::restrictions'] = [
 953                                 'pages' => explode( "\n", $data['PageRestrictions'] ),
 954                         ];
 955                 }
 956
 957                 # Make log entry, if the name is hidden, put it in the suppression log
 958                 $log_type = $data['HideUser'] ? 'suppress' : 'block';
 959                 $logEntry = new ManualLogEntry( $log_type, $logaction );
 960                 $logEntry->setTarget( Title::makeTitle( NS_USER, $target ) );
 961                 $logEntry->setComment( $data['Reason'][0] );
 962                 $logEntry->setPerformer( $performer );
 963                 $logEntry->setParameters( $logParams );
 964                 # Relate log ID to block ID (T27763)
 965                 $logEntry->setRelations( [ 'ipb_id' => $block->getId() ] );
 966                 $logId = $logEntry->insert();
 967
 968                 if ( !empty( $data['Tags'] ) ) {
 969                         $logEntry->setTags( $data['Tags'] );
 970                 }
 971
 972                 $logEntry->publish( $logId );
 973
 974                 return true;
 975         }
 976
 977         /**
 978          * Get an array of suggested block durations from MediaWiki:Ipboptions
 979          * @todo FIXME: This uses a rather odd syntax for the options, should it be converted
 980          *     to the standard "**<duration>|<displayname>" format?
 981          * @param Language|null $lang The language to get the durations in, or null to use
 982          *     the wiki's content language
 983          * @param bool $includeOther Whether to include the 'other' option in the list of
 984          *     suggestions
 985          * @return array
 986          */
 987         public static function getSuggestedDurations( Language $lang = null, $includeOther = true ) {
 988                 $a = [];
 989                 $msg = $lang === null
 990                         ? wfMessage( 'ipboptions' )->inContentLanguage()->text()
 991                         : wfMessage( 'ipboptions' )->inLanguage( $lang )->text();
 992
 993                 if ( $msg == '-' ) {
 994                         return [];
 995                 }
 996
 997                 foreach ( explode( ',', $msg ) as $option ) {
 998                         if ( strpos( $option, ':' ) === false ) {
 999                                 $option = "$option:$option";
1000                         }
1001
1002                         list( $show, $value ) = explode( ':', $option );
1003                         $a[$show] = $value;
1004                 }
1005
1006                 if ( $a && $includeOther ) {
1007                         // if options exist, add other to the end instead of the begining (which
1008                         // is what happens by default).
1009                         $a[ wfMessage( 'ipbother' )->text() ] = 'other';
1010                 }
1011
1012                 return $a;
1013         }
1014
1015         /**
1016          * Convert a submitted expiry time, which may be relative ("2 weeks", etc) or absolute
1017          * ("24 May 2034", etc), into an absolute timestamp we can put into the database.
1018          *
1019          * @todo strtotime() only accepts English strings. This means the expiry input
1020          *       can only be specified in English.
1021          * @see https://secure.php.net/manual/en/function.strtotime.php
1022          *
1023          * @param string $expiry Whatever was typed into the form
1024          * @return string|bool Timestamp or 'infinity' or false on error.
1025          */
1026         public static function parseExpiryInput( $expiry ) {
1027                 if ( wfIsInfinity( $expiry ) ) {
1028                         return 'infinity';
1029                 }
1030
1031                 $expiry = strtotime( $expiry );
1032
1033                 if ( $expiry < 0 || $expiry === false ) {
1034                         return false;
1035                 }
1036
1037                 return wfTimestamp( TS_MW, $expiry );
1038         }
1039
1040         /**
1041          * Can we do an email block?
1042          * @param User $user The sysop wanting to make a block
1043          * @return bool
1044          */
1045         public static function canBlockEmail( $user ) {
1046                 global $wgEnableUserEmail, $wgSysopEmailBans;
1047
1048                 return ( $wgEnableUserEmail && $wgSysopEmailBans && $user->isAllowed( 'blockemail' ) );
1049         }
1050
1051         /**
1052          * T17810: blocked admins should not be able to block/unblock
1053          * others, and probably shouldn't be able to unblock themselves
1054          * either.
1055          *
1056          * Exception: Users can block the user who blocked them, to reduce
1057          * advantage of a malicious account blocking all admins (T150826)
1058          *
1059          * @param User|int|string|null $target Target to block or unblock; could be a User object,
1060          *   or a user ID or username, or null when the target is not known yet (e.g. when
1061          *   displaying Special:Block)
1062          * @param User $performer User doing the request
1063          * @return bool|string True or error message key
1064          */
1065         public static function checkUnblockSelf( $target, User $performer ) {
1066                 if ( is_int( $target ) ) {
1067                         $target = User::newFromId( $target );
1068                 } elseif ( is_string( $target ) ) {
1069                         $target = User::newFromName( $target );
1070                 }
1071                 if ( $performer->isBlocked() ) {
1072                         if ( $target instanceof User && $target->getId() == $performer->getId() ) {
1073                                 # User is trying to unblock themselves
1074                                 if ( $performer->isAllowed( 'unblockself' ) ) {
1075                                         return true;
1076                                         # User blocked themselves and is now trying to reverse it
1077                                 } elseif ( $performer->blockedBy() === $performer->getName() ) {
1078                                         return true;
1079                                 } else {
1080                                         return 'ipbnounblockself';
1081                                 }
1082                         } elseif (
1083                                 $target instanceof User &&
1084                                 $performer->getBlock() instanceof Block &&
1085                                 $performer->getBlock()->getBy() &&
1086                                 $performer->getBlock()->getBy() === $target->getId()
1087                         ) {
1088                                 // Allow users to block the user that blocked them.
1089                                 // This is to prevent a situation where a malicious user
1090                                 // blocks all other users. This way, the non-malicious
1091                                 // user can block the malicious user back, resulting
1092                                 // in a stalemate.
1093                                 return true;
1094
1095                         } else {
1096                                 # User is trying to block/unblock someone else
1097                                 return 'ipbblocked';
1098                         }
1099                 } else {
1100                         return true;
1101                 }
1102         }
1103
1104         /**
1105          * Return a comma-delimited list of "flags" to be passed to the log
1106          * reader for this block, to provide more information in the logs
1107          * @param array $data From HTMLForm data
1108          * @param int $type Block::TYPE_ constant (USER, RANGE, or IP)
1109          * @return string
1110          */
1111         protected static function blockLogFlags( array $data, $type ) {
1112                 $config = RequestContext::getMain()->getConfig();
1113
1114                 $blockAllowsUTEdit = $config->get( 'BlockAllowsUTEdit' );
1115
1116                 $flags = [];
1117
1118                 # when blocking a user the option 'anononly' is not available/has no effect
1119                 # -> do not write this into log
1120                 if ( !$data['HardBlock'] && $type != Block::TYPE_USER ) {
1121                         // For grepping: message block-log-flags-anononly
1122                         $flags[] = 'anononly';
1123                 }
1124
1125                 if ( $data['CreateAccount'] ) {
1126                         // For grepping: message block-log-flags-nocreate
1127                         $flags[] = 'nocreate';
1128                 }
1129
1130                 # Same as anononly, this is not displayed when blocking an IP address
1131                 if ( !$data['AutoBlock'] && $type == Block::TYPE_USER ) {
1132                         // For grepping: message block-log-flags-noautoblock
1133                         $flags[] = 'noautoblock';
1134                 }
1135
1136                 if ( $data['DisableEmail'] ) {
1137                         // For grepping: message block-log-flags-noemail
1138                         $flags[] = 'noemail';
1139                 }
1140
1141                 if ( $blockAllowsUTEdit && $data['DisableUTEdit'] ) {
1142                         // For grepping: message block-log-flags-nousertalk
1143                         $flags[] = 'nousertalk';
1144                 }
1145
1146                 if ( $data['HideUser'] ) {
1147                         // For grepping: message block-log-flags-hiddenname
1148                         $flags[] = 'hiddenname';
1149                 }
1150
1151                 return implode( ',', $flags );
1152         }
1153
1154         /**
1155          * Process the form on POST submission.
1156          * @param array $data
1157          * @param HTMLForm|null $form
1158          * @return bool|array True for success, false for didn't-try, array of errors on failure
1159          */
1160         public function onSubmit( array $data, HTMLForm $form = null ) {
1161                 return self::processForm( $data, $form->getContext() );
1162         }
1163
1164         /**
1165          * Do something exciting on successful processing of the form, most likely to show a
1166          * confirmation message
1167          */
1168         public function onSuccess() {
1169                 $out = $this->getOutput();
1170                 $out->setPageTitle( $this->msg( 'blockipsuccesssub' ) );
1171                 $out->addWikiMsg( 'blockipsuccesstext', wfEscapeWikiText( $this->target ) );
1172         }
1173
1174         /**
1175          * Return an array of subpages beginning with $search that this special page will accept.
1176          *
1177          * @param string $search Prefix to search for
1178          * @param int $limit Maximum number of results to return (usually 10)
1179          * @param int $offset Number of results to skip (usually 0)
1180          * @return string[] Matching subpages
1181          */
1182         public function prefixSearchSubpages( $search, $limit, $offset ) {
1183                 $user = User::newFromName( $search );
1184                 if ( !$user ) {
1185                         // No prefix suggestion for invalid user
1186                         return [];
1187                 }
1188                 // Autocomplete subpage as user list - public to allow caching
1189                 return UserNamePrefixSearch::search( 'public', $search, $limit, $offset );
1190         }
1191
1192         protected function getGroupName() {
1193                 return 'users';
1194         }
1195 }