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                         'label-message' => 'ipaddressorusername',
 160                         'id' => 'mw-bi-target',
 161                         'size' => '45',
 162                         'autofocus' => true,
 163                         'required' => true,
 164                         'validation-callback' => [ __CLASS__, 'validateTargetField' ],
 165                 ];
 166
 167                 if ( $enablePartialBlocks ) {
 168                         $a['EditingRestriction'] = [
 169                                 'type' => 'radio',
 170                                 'label' => $this->msg( 'ipb-type-label' )->text(),
 171                                 'options' => [
 172                                         $this->msg( 'ipb-sitewide' )->text() => 'sitewide',
 173                                         $this->msg( 'ipb-partial' )->text() => 'partial',
 174                                 ],
 175                         ];
 176                         $a['PageRestrictions'] = [
 177                                 'type' => 'titlesmultiselect',
 178                                 'label' => $this->msg( 'ipb-pages-label' )->text(),
 179                                 'exists' => true,
 180                                 'max' => 10,
 181                                 'cssclass' => 'mw-block-page-restrictions',
 182                                 'showMissing' => false,
 183                                 'input' => [
 184                                         'autocomplete' => false
 185                                 ],
 186                         ];
 187                 }
 188
 189                 $a['Expiry'] = [
 190                         'type' => 'expiry',
 191                         'label-message' => 'ipbexpiry',
 192                         'required' => true,
 193                         'options' => $suggestedDurations,
 194                         'default' => $this->msg( 'ipb-default-expiry' )->inContentLanguage()->text(),
 195                 ];
 196
 197                 $a['Reason'] = [
 198                         'type' => 'selectandother',
 199                         // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
 200                         // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
 201                         // Unicode codepoints (or 255 UTF-8 bytes for old schema).
 202                         'maxlength' => $oldCommentSchema ? 255 : CommentStore::COMMENT_CHARACTER_LIMIT,
 203                         'maxlength-unit' => 'codepoints',
 204                         'label-message' => 'ipbreason',
 205                         'options-message' => 'ipbreason-dropdown',
 206                 ];
 207
 208                 $a['CreateAccount'] = [
 209                         'type' => 'check',
 210                         'label-message' => 'ipbcreateaccount',
 211                         'default' => true,
 212                 ];
 213
 214                 if ( self::canBlockEmail( $user ) ) {
 215                         $a['DisableEmail'] = [
 216                                 'type' => 'check',
 217                                 'label-message' => 'ipbemailban',
 218                         ];
 219                 }
 220
 221                 if ( $wgBlockAllowsUTEdit ) {
 222                         $a['DisableUTEdit'] = [
 223                                 'type' => 'check',
 224                                 'label-message' => 'ipb-disableusertalk',
 225                                 'default' => false,
 226                         ];
 227                 }
 228
 229                 $a['AutoBlock'] = [
 230                         'type' => 'check',
 231                         'label-message' => 'ipbenableautoblock',
 232                         'default' => true,
 233                 ];
 234
 235                 # Allow some users to hide name from block log, blocklist and listusers
 236                 if ( $user->isAllowed( 'hideuser' ) ) {
 237                         $a['HideUser'] = [
 238                                 'type' => 'check',
 239                                 'label-message' => 'ipbhidename',
 240                                 'cssclass' => 'mw-block-hideuser',
 241                         ];
 242                 }
 243
 244                 # Watchlist their user page? (Only if user is logged in)
 245                 if ( $user->isLoggedIn() ) {
 246                         $a['Watch'] = [
 247                                 'type' => 'check',
 248                                 'label-message' => 'ipbwatchuser',
 249                         ];
 250                 }
 251
 252                 $a['HardBlock'] = [
 253                         'type' => 'check',
 254                         'label-message' => 'ipb-hardblock',
 255                         'default' => false,
 256                 ];
 257
 258                 # This is basically a copy of the Target field, but the user can't change it, so we
 259                 # can see if the warnings we maybe showed to the user before still apply
 260                 $a['PreviousTarget'] = [
 261                         'type' => 'hidden',
 262                         'default' => false,
 263                 ];
 264
 265                 # We'll turn this into a checkbox if we need to
 266                 $a['Confirm'] = [
 267                         'type' => 'hidden',
 268                         'default' => '',
 269                         'label-message' => 'ipb-confirm',
 270                         'cssclass' => 'mw-block-confirm',
 271                 ];
 272
 273                 $this->maybeAlterFormDefaults( $a );
 274
 275                 // Allow extensions to add more fields
 276                 Hooks::run( 'SpecialBlockModifyFormFields', [ $this, &$a ] );
 277
 278                 return $a;
 279         }
 280
 281         /**
 282          * If the user has already been blocked with similar settings, load that block
 283          * and change the defaults for the form fields to match the existing settings.
 284          * @param array &$fields HTMLForm descriptor array
 285          * @return bool Whether fields were altered (that is, whether the target is
 286          *     already blocked)
 287          */
 288         protected function maybeAlterFormDefaults( &$fields ) {
 289                 # This will be overwritten by request data
 290                 $fields['Target']['default'] = (string)$this->target;
 291
 292                 if ( $this->target ) {
 293                         $status = self::validateTarget( $this->target, $this->getUser() );
 294                         if ( !$status->isOK() ) {
 295                                 $errors = $status->getErrorsArray();
 296                                 $this->preErrors = array_merge( $this->preErrors, $errors );
 297                         }
 298                 }
 299
 300                 # This won't be
 301                 $fields['PreviousTarget']['default'] = (string)$this->target;
 302
 303                 $block = Block::newFromTarget( $this->target );
 304
 305                 if ( $block instanceof Block && !$block->mAuto # The block exists and isn't an autoblock
 306                         && ( $this->type != Block::TYPE_RANGE # The block isn't a rangeblock
 307                                 || $block->getTarget() == $this->target ) # or if it is, the range is what we're about to block
 308                 ) {
 309                         $fields['HardBlock']['default'] = $block->isHardblock();
 310                         $fields['CreateAccount']['default'] = $block->prevents( 'createaccount' );
 311                         $fields['AutoBlock']['default'] = $block->isAutoblocking();
 312
 313                         if ( isset( $fields['DisableEmail'] ) ) {
 314                                 $fields['DisableEmail']['default'] = $block->prevents( 'sendemail' );
 315                         }
 316
 317                         if ( isset( $fields['HideUser'] ) ) {
 318                                 $fields['HideUser']['default'] = $block->mHideName;
 319                         }
 320
 321                         if ( isset( $fields['DisableUTEdit'] ) ) {
 322                                 $fields['DisableUTEdit']['default'] = $block->prevents( 'editownusertalk' );
 323                         }
 324
 325                         // If the username was hidden (ipb_deleted == 1), don't show the reason
 326                         // unless this user also has rights to hideuser: T37839
 327                         if ( !$block->mHideName || $this->getUser()->isAllowed( 'hideuser' ) ) {
 328                                 $fields['Reason']['default'] = $block->mReason;
 329                         } else {
 330                                 $fields['Reason']['default'] = '';
 331                         }
 332
 333                         if ( $this->getRequest()->wasPosted() ) {
 334                                 # Ok, so we got a POST submission asking us to reblock a user.  So show the
 335                                 # confirm checkbox; the user will only see it if they haven't previously
 336                                 $fields['Confirm']['type'] = 'check';
 337                         } else {
 338                                 # We got a target, but it wasn't a POST request, so the user must have gone
 339                                 # to a link like [[Special:Block/User]].  We don't need to show the checkbox
 340                                 # as long as they go ahead and block *that* user
 341                                 $fields['Confirm']['default'] = 1;
 342                         }
 343
 344                         if ( $block->mExpiry == 'infinity' ) {
 345                                 $fields['Expiry']['default'] = 'infinite';
 346                         } else {
 347                                 $fields['Expiry']['default'] = wfTimestamp( TS_RFC2822, $block->mExpiry );
 348                         }
 349
 350                         $this->alreadyBlocked = true;
 351                         $this->preErrors[] = [ 'ipb-needreblock', wfEscapeWikiText( (string)$block->getTarget() ) ];
 352                 }
 353
 354                 # We always need confirmation to do HideUser
 355                 if ( $this->requestedHideUser ) {
 356                         $fields['Confirm']['type'] = 'check';
 357                         unset( $fields['Confirm']['default'] );
 358                         $this->preErrors[] = [ 'ipb-confirmhideuser', 'ipb-confirmaction' ];
 359                 }
 360
 361                 # Or if the user is trying to block themselves
 362                 if ( (string)$this->target === $this->getUser()->getName() ) {
 363                         $fields['Confirm']['type'] = 'check';
 364                         unset( $fields['Confirm']['default'] );
 365                         $this->preErrors[] = [ 'ipb-blockingself', 'ipb-confirmaction' ];
 366                 }
 367
 368                 if ( $this->getConfig()->get( 'EnablePartialBlocks' ) ) {
 369                         if ( $block instanceof Block && !$block->isSitewide() ) {
 370                                 $fields['EditingRestriction']['default'] = 'partial';
 371                         } else {
 372                                 $fields['EditingRestriction']['default'] = 'sitewide';
 373                         }
 374
 375                         if ( $block instanceof Block ) {
 376                                 $pageRestrictions = [];
 377                                 foreach ( $block->getRestrictions() as $restriction ) {
 378                                         if ( $restriction->getType() !== 'page' ) {
 379                                                 continue;
 380                                         }
 381
 382                                         $pageRestrictions[] = $restriction->getTitle()->getPrefixedText();
 383                                 }
 384
 385                                 // Sort the restrictions so they are in alphabetical order.
 386                                 sort( $pageRestrictions );
 387                                 $fields['PageRestrictions']['default'] = implode( "\n", $pageRestrictions );
 388                         }
 389                 }
 390         }
 391
 392         /**
 393          * Add header elements like block log entries, etc.
 394          * @return string
 395          */
 396         protected function preText() {
 397                 $this->getOutput()->addModuleStyles( 'mediawiki.widgets.TagMultiselectWidget.styles' );
 398                 $this->getOutput()->addModules( [ 'mediawiki.special.block' ] );
 399
 400                 $blockCIDRLimit = $this->getConfig()->get( 'BlockCIDRLimit' );
 401                 $text = $this->msg( 'blockiptext', $blockCIDRLimit['IPv4'], $blockCIDRLimit['IPv6'] )->parse();
 402
 403                 $otherBlockMessages = [];
 404                 if ( $this->target !== null ) {
 405                         $targetName = $this->target;
 406                         if ( $this->target instanceof User ) {
 407                                 $targetName = $this->target->getName();
 408                         }
 409                         # Get other blocks, i.e. from GlobalBlocking or TorBlock extension
 410                         Hooks::run( 'OtherBlockLogLink', [ &$otherBlockMessages, $targetName ] );
 411
 412                         if ( count( $otherBlockMessages ) ) {
 413                                 $s = Html::rawElement(
 414                                         'h2',
 415                                         [],
 416                                         $this->msg( 'ipb-otherblocks-header', count( $otherBlockMessages ) )->parse()
 417                                 ) . "\n";
 418
 419                                 $list = '';
 420
 421                                 foreach ( $otherBlockMessages as $link ) {
 422                                         $list .= Html::rawElement( 'li', [], $link ) . "\n";
 423                                 }
 424
 425                                 $s .= Html::rawElement(
 426                                         'ul',
 427                                         [ 'class' => 'mw-blockip-alreadyblocked' ],
 428                                         $list
 429                                 ) . "\n";
 430
 431                                 $text .= $s;
 432                         }
 433                 }
 434
 435                 return $text;
 436         }
 437
 438         /**
 439          * Add footer elements to the form
 440          * @return string
 441          */
 442         protected function postText() {
 443                 $links = [];
 444
 445                 $this->getOutput()->addModuleStyles( 'mediawiki.special' );
 446
 447                 $linkRenderer = $this->getLinkRenderer();
 448                 # Link to the user's contributions, if applicable
 449                 if ( $this->target instanceof User ) {
 450                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $this->target->getName() );
 451                         $links[] = $linkRenderer->makeLink(
 452                                 $contribsPage,
 453                                 $this->msg( 'ipb-blocklist-contribs', $this->target->getName() )->text()
 454                         );
 455                 }
 456
 457                 # Link to unblock the specified user, or to a blank unblock form
 458                 if ( $this->target instanceof User ) {
 459                         $message = $this->msg(
 460                                 'ipb-unblock-addr',
 461                                 wfEscapeWikiText( $this->target->getName() )
 462                         )->parse();
 463                         $list = SpecialPage::getTitleFor( 'Unblock', $this->target->getName() );
 464                 } else {
 465                         $message = $this->msg( 'ipb-unblock' )->parse();
 466                         $list = SpecialPage::getTitleFor( 'Unblock' );
 467                 }
 468                 $links[] = $linkRenderer->makeKnownLink(
 469                         $list,
 470                         new HtmlArmor( $message )
 471                 );
 472
 473                 # Link to the block list
 474                 $links[] = $linkRenderer->makeKnownLink(
 475                         SpecialPage::getTitleFor( 'BlockList' ),
 476                         $this->msg( 'ipb-blocklist' )->text()
 477                 );
 478
 479                 $user = $this->getUser();
 480
 481                 # Link to edit the block dropdown reasons, if applicable
 482                 if ( $user->isAllowed( 'editinterface' ) ) {
 483                         $links[] = $linkRenderer->makeKnownLink(
 484                                 $this->msg( 'ipbreason-dropdown' )->inContentLanguage()->getTitle(),
 485                                 $this->msg( 'ipb-edit-dropdown' )->text(),
 486                                 [],
 487                                 [ 'action' => 'edit' ]
 488                         );
 489                 }
 490
 491                 $text = Html::rawElement(
 492                         'p',
 493                         [ 'class' => 'mw-ipb-conveniencelinks' ],
 494                         $this->getLanguage()->pipeList( $links )
 495                 );
 496
 497                 $userTitle = self::getTargetUserTitle( $this->target );
 498                 if ( $userTitle ) {
 499                         # Get relevant extracts from the block and suppression logs, if possible
 500                         $out = '';
 501
 502                         LogEventsList::showLogExtract(
 503                                 $out,
 504                                 'block',
 505                                 $userTitle,
 506                                 '',
 507                                 [
 508                                         'lim' => 10,
 509                                         'msgKey' => [ 'blocklog-showlog', $userTitle->getText() ],
 510                                         'showIfEmpty' => false
 511                                 ]
 512                         );
 513                         $text .= $out;
 514
 515                         # Add suppression block entries if allowed
 516                         if ( $user->isAllowed( 'suppressionlog' ) ) {
 517                                 LogEventsList::showLogExtract(
 518                                         $out,
 519                                         'suppress',
 520                                         $userTitle,
 521                                         '',
 522                                         [
 523                                                 'lim' => 10,
 524                                                 'conds' => [ 'log_action' => [ 'block', 'reblock', 'unblock' ] ],
 525                                                 'msgKey' => [ 'blocklog-showsuppresslog', $userTitle->getText() ],
 526                                                 'showIfEmpty' => false
 527                                         ]
 528                                 );
 529
 530                                 $text .= $out;
 531                         }
 532                 }
 533
 534                 return $text;
 535         }
 536
 537         /**
 538          * Get a user page target for things like logs.
 539          * This handles account and IP range targets.
 540          * @param User|string $target
 541          * @return Title|null
 542          */
 543         protected static function getTargetUserTitle( $target ) {
 544                 if ( $target instanceof User ) {
 545                         return $target->getUserPage();
 546                 } elseif ( IP::isIPAddress( $target ) ) {
 547                         return Title::makeTitleSafe( NS_USER, $target );
 548                 }
 549
 550                 return null;
 551         }
 552
 553         /**
 554          * Determine the target of the block, and the type of target
 555          * @todo Should be in Block.php?
 556          * @param string $par Subpage parameter passed to setup, or data value from
 557          *     the HTMLForm
 558          * @param WebRequest|null $request Optionally try and get data from a request too
 559          * @return array [ User|string|null, Block::TYPE_ constant|null ]
 560          */
 561         public static function getTargetAndType( $par, WebRequest $request = null ) {
 562                 $i = 0;
 563                 $target = null;
 564
 565                 while ( true ) {
 566                         switch ( $i++ ) {
 567                                 case 0:
 568                                         # The HTMLForm will check wpTarget first and only if it doesn't get
 569                                         # a value use the default, which will be generated from the options
 570                                         # below; so this has to have a higher precedence here than $par, or
 571                                         # we could end up with different values in $this->target and the HTMLForm!
 572                                         if ( $request instanceof WebRequest ) {
 573                                                 $target = $request->getText( 'wpTarget', null );
 574                                         }
 575                                         break;
 576                                 case 1:
 577                                         $target = $par;
 578                                         break;
 579                                 case 2:
 580                                         if ( $request instanceof WebRequest ) {
 581                                                 $target = $request->getText( 'ip', null );
 582                                         }
 583                                         break;
 584                                 case 3:
 585                                         # B/C @since 1.18
 586                                         if ( $request instanceof WebRequest ) {
 587                                                 $target = $request->getText( 'wpBlockAddress', null );
 588                                         }
 589                                         break;
 590                                 case 4:
 591                                         break 2;
 592                         }
 593
 594                         list( $target, $type ) = Block::parseTarget( $target );
 595
 596                         if ( $type !== null ) {
 597                                 return [ $target, $type ];
 598                         }
 599                 }
 600
 601                 return [ null, null ];
 602         }
 603
 604         /**
 605          * HTMLForm field validation-callback for Target field.
 606          * @since 1.18
 607          * @param string $value
 608          * @param array $alldata
 609          * @param HTMLForm $form
 610          * @return Message
 611          */
 612         public static function validateTargetField( $value, $alldata, $form ) {
 613                 $status = self::validateTarget( $value, $form->getUser() );
 614                 if ( !$status->isOK() ) {
 615                         $errors = $status->getErrorsArray();
 616
 617                         return $form->msg( ...$errors[0] );
 618                 } else {
 619                         return true;
 620                 }
 621         }
 622
 623         /**
 624          * Validate a block target.
 625          *
 626          * @since 1.21
 627          * @param string $value Block target to check
 628          * @param User $user Performer of the block
 629          * @return Status
 630          */
 631         public static function validateTarget( $value, User $user ) {
 632                 global $wgBlockCIDRLimit;
 633
 634                 /** @var User $target */
 635                 list( $target, $type ) = self::getTargetAndType( $value );
 636                 $status = Status::newGood( $target );
 637
 638                 if ( $type == Block::TYPE_USER ) {
 639                         if ( $target->isAnon() ) {
 640                                 $status->fatal(
 641                                         'nosuchusershort',
 642                                         wfEscapeWikiText( $target->getName() )
 643                                 );
 644                         }
 645
 646                         $unblockStatus = self::checkUnblockSelf( $target, $user );
 647                         if ( $unblockStatus !== true ) {
 648                                 $status->fatal( 'badaccess', $unblockStatus );
 649                         }
 650                 } elseif ( $type == Block::TYPE_RANGE ) {
 651                         list( $ip, $range ) = explode( '/', $target, 2 );
 652
 653                         if (
 654                                 ( IP::isIPv4( $ip ) && $wgBlockCIDRLimit['IPv4'] == 32 ) ||
 655                                 ( IP::isIPv6( $ip ) && $wgBlockCIDRLimit['IPv6'] == 128 )
 656                         ) {
 657                                 // Range block effectively disabled
 658                                 $status->fatal( 'range_block_disabled' );
 659                         }
 660
 661                         if (
 662                                 ( IP::isIPv4( $ip ) && $range > 32 ) ||
 663                                 ( IP::isIPv6( $ip ) && $range > 128 )
 664                         ) {
 665                                 // Dodgy range
 666                                 $status->fatal( 'ip_range_invalid' );
 667                         }
 668
 669                         if ( IP::isIPv4( $ip ) && $range < $wgBlockCIDRLimit['IPv4'] ) {
 670                                 $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv4'] );
 671                         }
 672
 673                         if ( IP::isIPv6( $ip ) && $range < $wgBlockCIDRLimit['IPv6'] ) {
 674                                 $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv6'] );
 675                         }
 676                 } elseif ( $type == Block::TYPE_IP ) {
 677                         # All is well
 678                 } else {
 679                         $status->fatal( 'badipaddress' );
 680                 }
 681
 682                 return $status;
 683         }
 684
 685         /**
 686          * Given the form data, actually implement a block. This is also called from ApiBlock.
 687          *
 688          * @param array $data
 689          * @param IContextSource $context
 690          * @return bool|string
 691          */
 692         public static function processForm( array $data, IContextSource $context ) {
 693                 global $wgBlockAllowsUTEdit, $wgHideUserContribLimit;
 694
 695                 $performer = $context->getUser();
 696                 $enablePartialBlocks = $context->getConfig()->get( 'EnablePartialBlocks' );
 697
 698                 // Handled by field validator callback
 699                 // self::validateTargetField( $data['Target'] );
 700
 701                 # This might have been a hidden field or a checkbox, so interesting data
 702                 # can come from it
 703                 $data['Confirm'] = !in_array( $data['Confirm'], [ '', '0', null, false ], true );
 704
 705                 /** @var User $target */
 706                 list( $target, $type ) = self::getTargetAndType( $data['Target'] );
 707                 if ( $type == Block::TYPE_USER ) {
 708                         $user = $target;
 709                         $target = $user->getName();
 710                         $userId = $user->getId();
 711
 712                         # Give admins a heads-up before they go and block themselves.  Much messier
 713                         # to do this for IPs, but it's pretty unlikely they'd ever get the 'block'
 714                         # permission anyway, although the code does allow for it.
 715                         # Note: Important to use $target instead of $data['Target']
 716                         # since both $data['PreviousTarget'] and $target are normalized
 717                         # but $data['target'] gets overridden by (non-normalized) request variable
 718                         # from previous request.
 719                         if ( $target === $performer->getName() &&
 720                                 ( $data['PreviousTarget'] !== $target || !$data['Confirm'] )
 721                         ) {
 722                                 return [ 'ipb-blockingself', 'ipb-confirmaction' ];
 723                         }
 724                 } elseif ( $type == Block::TYPE_RANGE ) {
 725                         $user = null;
 726                         $userId = 0;
 727                 } elseif ( $type == Block::TYPE_IP ) {
 728                         $user = null;
 729                         $target = $target->getName();
 730                         $userId = 0;
 731                 } else {
 732                         # This should have been caught in the form field validation
 733                         return [ 'badipaddress' ];
 734                 }
 735
 736                 $expiryTime = self::parseExpiryInput( $data['Expiry'] );
 737
 738                 if (
 739                         // an expiry time is needed
 740                         ( strlen( $data['Expiry'] ) == 0 ) ||
 741                         // can't be a larger string as 50 (it should be a time format in any way)
 742                         ( strlen( $data['Expiry'] ) > 50 ) ||
 743                         // check, if the time could be parsed
 744                         !$expiryTime
 745                 ) {
 746                         return [ 'ipb_expiry_invalid' ];
 747                 }
 748
 749                 // an expiry time should be in the future, not in the
 750                 // past (wouldn't make any sense) - bug T123069
 751                 if ( $expiryTime < wfTimestampNow() ) {
 752                         return [ 'ipb_expiry_old' ];
 753                 }
 754
 755                 if ( !isset( $data['DisableEmail'] ) ) {
 756                         $data['DisableEmail'] = false;
 757                 }
 758
 759                 # If the user has done the form 'properly', they won't even have been given the
 760                 # option to suppress-block unless they have the 'hideuser' permission
 761                 if ( !isset( $data['HideUser'] ) ) {
 762                         $data['HideUser'] = false;
 763                 }
 764
 765                 if ( $data['HideUser'] ) {
 766                         if ( !$performer->isAllowed( 'hideuser' ) ) {
 767                                 # this codepath is unreachable except by a malicious user spoofing forms,
 768                                 # or by race conditions (user has hideuser and block rights, loads block form,
 769                                 # and loses hideuser rights before submission); so need to fail completely
 770                                 # rather than just silently disable hiding
 771                                 return [ 'badaccess-group0' ];
 772                         }
 773
 774                         # Recheck params here...
 775                         if ( $type != Block::TYPE_USER ) {
 776                                 $data['HideUser'] = false; # IP users should not be hidden
 777                         } elseif ( !wfIsInfinity( $data['Expiry'] ) ) {
 778                                 # Bad expiry.
 779                                 return [ 'ipb_expiry_temp' ];
 780                         } elseif ( $wgHideUserContribLimit !== false
 781                                 && $user->getEditCount() > $wgHideUserContribLimit
 782                         ) {
 783                                 # Typically, the user should have a handful of edits.
 784                                 # Disallow hiding users with many edits for performance.
 785                                 return [ [ 'ipb_hide_invalid',
 786                                         Message::numParam( $wgHideUserContribLimit ) ] ];
 787                         } elseif ( !$data['Confirm'] ) {
 788                                 return [ 'ipb-confirmhideuser', 'ipb-confirmaction' ];
 789                         }
 790                 }
 791
 792                 # Create block object.
 793                 $block = new Block();
 794                 $block->setTarget( $target );
 795                 $block->setBlocker( $performer );
 796                 $block->mReason = $data['Reason'][0];
 797                 $block->mExpiry = $expiryTime;
 798                 $block->prevents( 'createaccount', $data['CreateAccount'] );
 799                 $block->prevents( 'editownusertalk', ( !$wgBlockAllowsUTEdit || $data['DisableUTEdit'] ) );
 800                 $block->prevents( 'sendemail', $data['DisableEmail'] );
 801                 $block->isHardblock( $data['HardBlock'] );
 802                 $block->isAutoblocking( $data['AutoBlock'] );
 803                 $block->mHideName = $data['HideUser'];
 804
 805                 if (
 806                         $enablePartialBlocks &&
 807                         isset( $data['EditingRestriction'] ) &&
 808                         $data['EditingRestriction'] === 'partial'
 809                  ) {
 810                          $block->isSitewide( false );
 811                 }
 812
 813                 $reason = [ 'hookaborted' ];
 814                 if ( !Hooks::run( 'BlockIp', [ &$block, &$performer, &$reason ] ) ) {
 815                         return $reason;
 816                 }
 817
 818                 $restrictions = [];
 819                 if ( $enablePartialBlocks ) {
 820                         if ( !empty( $data['PageRestrictions'] ) ) {
 821                                 $restrictions = array_map( function ( $text ) {
 822                                         $title = Title::newFromText( $text );
 823                                         // Use the link cache since the title has already been loaded when
 824                                         // the field was validated.
 825                                         $restriction = new PageRestriction( 0, $title->getArticleId() );
 826                                         $restriction->setTitle( $title );
 827                                         return $restriction;
 828                                 }, explode( "\n", $data['PageRestrictions'] ) );
 829                         }
 830
 831                         $block->setRestrictions( $restrictions );
 832                 }
 833
 834                 $priorBlock = null;
 835                 # Try to insert block. Is there a conflicting block?
 836                 $status = $block->insert();
 837                 if ( !$status ) {
 838                         # Indicates whether the user is confirming the block and is aware of
 839                         # the conflict (did not change the block target in the meantime)
 840                         $blockNotConfirmed = !$data['Confirm'] || ( array_key_exists( 'PreviousTarget', $data )
 841                                 && $data['PreviousTarget'] !== $target );
 842
 843                         # Special case for API - T34434
 844                         $reblockNotAllowed = ( array_key_exists( 'Reblock', $data ) && !$data['Reblock'] );
 845
 846                         # Show form unless the user is already aware of this...
 847                         if ( $blockNotConfirmed || $reblockNotAllowed ) {
 848                                 return [ [ 'ipb_already_blocked', $block->getTarget() ] ];
 849                                 # Otherwise, try to update the block...
 850                         } else {
 851                                 # This returns direct blocks before autoblocks/rangeblocks, since we should
 852                                 # be sure the user is blocked by now it should work for our purposes
 853                                 $currentBlock = Block::newFromTarget( $target );
 854                                 if ( $block->equals( $currentBlock ) ) {
 855                                         return [ [ 'ipb_already_blocked', $block->getTarget() ] ];
 856                                 }
 857                                 # If the name was hidden and the blocking user cannot hide
 858                                 # names, then don't allow any block changes...
 859                                 if ( $currentBlock->mHideName && !$performer->isAllowed( 'hideuser' ) ) {
 860                                         return [ 'cant-see-hidden-user' ];
 861                                 }
 862
 863                                 $priorBlock = clone $currentBlock;
 864                                 $currentBlock->isHardblock( $block->isHardblock() );
 865                                 $currentBlock->prevents( 'createaccount', $block->prevents( 'createaccount' ) );
 866                                 $currentBlock->mExpiry = $block->mExpiry;
 867                                 $currentBlock->isAutoblocking( $block->isAutoblocking() );
 868                                 $currentBlock->mHideName = $block->mHideName;
 869                                 $currentBlock->prevents( 'sendemail', $block->prevents( 'sendemail' ) );
 870                                 $currentBlock->prevents( 'editownusertalk', $block->prevents( 'editownusertalk' ) );
 871                                 $currentBlock->mReason = $block->mReason;
 872
 873                                 if ( $enablePartialBlocks ) {
 874                                         // Maintain the sitewide status. If partial blocks is not enabled,
 875                                         // saving the block will result in a sitewide block.
 876                                         $currentBlock->isSitewide( $block->isSitewide() );
 877
 878                                         // Set the block id of the restrictions.
 879                                         $currentBlock->setRestrictions(
 880                                                 BlockRestriction::setBlockId( $currentBlock->getId(), $restrictions )
 881                                         );
 882                                 }
 883
 884                                 $status = $currentBlock->update();
 885
 886                                 $logaction = 'reblock';
 887
 888                                 # Unset _deleted fields if requested
 889                                 if ( $currentBlock->mHideName && !$data['HideUser'] ) {
 890                                         RevisionDeleteUser::unsuppressUserName( $target, $userId );
 891                                 }
 892
 893                                 # If hiding/unhiding a name, this should go in the private logs
 894                                 if ( (bool)$currentBlock->mHideName ) {
 895                                         $data['HideUser'] = true;
 896                                 }
 897                         }
 898                 } else {
 899                         $logaction = 'block';
 900                 }
 901
 902                 Hooks::run( 'BlockIpComplete', [ $block, $performer, $priorBlock ] );
 903
 904                 # Set *_deleted fields if requested
 905                 if ( $data['HideUser'] ) {
 906                         RevisionDeleteUser::suppressUserName( $target, $userId );
 907                 }
 908
 909                 # Can't watch a rangeblock
 910                 if ( $type != Block::TYPE_RANGE && $data['Watch'] ) {
 911                         WatchAction::doWatch(
 912                                 Title::makeTitle( NS_USER, $target ),
 913                                 $performer,
 914                                 User::IGNORE_USER_RIGHTS
 915                         );
 916                 }
 917
 918                 # Block constructor sanitizes certain block options on insert
 919                 $data['BlockEmail'] = $block->prevents( 'sendemail' );
 920                 $data['AutoBlock'] = $block->isAutoblocking();
 921
 922                 # Prepare log parameters
 923                 $logParams = [];
 924                 $logParams['5::duration'] = $data['Expiry'];
 925                 $logParams['6::flags'] = self::blockLogFlags( $data, $type );
 926                 $logParams['sitewide'] = $block->isSitewide();
 927
 928                 if ( $enablePartialBlocks && !empty( $data['PageRestrictions'] ) ) {
 929                         $logParams['7::restrictions'] = [
 930                                 'pages' => explode( "\n", $data['PageRestrictions'] ),
 931                         ];
 932                 }
 933
 934                 # Make log entry, if the name is hidden, put it in the suppression log
 935                 $log_type = $data['HideUser'] ? 'suppress' : 'block';
 936                 $logEntry = new ManualLogEntry( $log_type, $logaction );
 937                 $logEntry->setTarget( Title::makeTitle( NS_USER, $target ) );
 938                 $logEntry->setComment( $data['Reason'][0] );
 939                 $logEntry->setPerformer( $performer );
 940                 $logEntry->setParameters( $logParams );
 941                 # Relate log ID to block IDs (T27763)
 942                 $blockIds = array_merge( [ $status['id'] ], $status['autoIds'] );
 943                 $logEntry->setRelations( [ 'ipb_id' => $blockIds ] );
 944                 $logId = $logEntry->insert();
 945
 946                 if ( !empty( $data['Tags'] ) ) {
 947                         $logEntry->setTags( $data['Tags'] );
 948                 }
 949
 950                 $logEntry->publish( $logId );
 951
 952                 return true;
 953         }
 954
 955         /**
 956          * Get an array of suggested block durations from MediaWiki:Ipboptions
 957          * @todo FIXME: This uses a rather odd syntax for the options, should it be converted
 958          *     to the standard "**<duration>|<displayname>" format?
 959          * @param Language|null $lang The language to get the durations in, or null to use
 960          *     the wiki's content language
 961          * @param bool $includeOther Whether to include the 'other' option in the list of
 962          *     suggestions
 963          * @return array
 964          */
 965         public static function getSuggestedDurations( Language $lang = null, $includeOther = true ) {
 966                 $a = [];
 967                 $msg = $lang === null
 968                         ? wfMessage( 'ipboptions' )->inContentLanguage()->text()
 969                         : wfMessage( 'ipboptions' )->inLanguage( $lang )->text();
 970
 971                 if ( $msg == '-' ) {
 972                         return [];
 973                 }
 974
 975                 foreach ( explode( ',', $msg ) as $option ) {
 976                         if ( strpos( $option, ':' ) === false ) {
 977                                 $option = "$option:$option";
 978                         }
 979
 980                         list( $show, $value ) = explode( ':', $option );
 981                         $a[$show] = $value;
 982                 }
 983
 984                 if ( $a && $includeOther ) {
 985                         // if options exist, add other to the end instead of the begining (which
 986                         // is what happens by default).
 987                         $a[ wfMessage( 'ipbother' )->text() ] = 'other';
 988                 }
 989
 990                 return $a;
 991         }
 992
 993         /**
 994          * Convert a submitted expiry time, which may be relative ("2 weeks", etc) or absolute
 995          * ("24 May 2034", etc), into an absolute timestamp we can put into the database.
 996          *
 997          * @todo strtotime() only accepts English strings. This means the expiry input
 998          *       can only be specified in English.
 999          * @see https://secure.php.net/manual/en/function.strtotime.php
1000          *
1001          * @param string $expiry Whatever was typed into the form
1002          * @return string|bool Timestamp or 'infinity' or false on error.
1003          */
1004         public static function parseExpiryInput( $expiry ) {
1005                 if ( wfIsInfinity( $expiry ) ) {
1006                         return 'infinity';
1007                 }
1008
1009                 $expiry = strtotime( $expiry );
1010
1011                 if ( $expiry < 0 || $expiry === false ) {
1012                         return false;
1013                 }
1014
1015                 return wfTimestamp( TS_MW, $expiry );
1016         }
1017
1018         /**
1019          * Can we do an email block?
1020          * @param User $user The sysop wanting to make a block
1021          * @return bool
1022          */
1023         public static function canBlockEmail( $user ) {
1024                 global $wgEnableUserEmail, $wgSysopEmailBans;
1025
1026                 return ( $wgEnableUserEmail && $wgSysopEmailBans && $user->isAllowed( 'blockemail' ) );
1027         }
1028
1029         /**
1030          * T17810: blocked admins should not be able to block/unblock
1031          * others, and probably shouldn't be able to unblock themselves
1032          * either.
1033          *
1034          * Exception: Users can block the user who blocked them, to reduce
1035          * advantage of a malicious account blocking all admins (T150826)
1036          *
1037          * @param User|int|string $user Target to block or unblock
1038          * @param User $performer User doing the request
1039          * @return bool|string True or error message key
1040          */
1041         public static function checkUnblockSelf( $user, User $performer ) {
1042                 if ( is_int( $user ) ) {
1043                         $user = User::newFromId( $user );
1044                 } elseif ( is_string( $user ) ) {
1045                         $user = User::newFromName( $user );
1046                 }
1047                 if ( $performer->isBlocked() ) {
1048                         if ( $user instanceof User && $user->getId() == $performer->getId() ) {
1049                                 # User is trying to unblock themselves
1050                                 if ( $performer->isAllowed( 'unblockself' ) ) {
1051                                         return true;
1052                                         # User blocked themselves and is now trying to reverse it
1053                                 } elseif ( $performer->blockedBy() === $performer->getName() ) {
1054                                         return true;
1055                                 } else {
1056                                         return 'ipbnounblockself';
1057                                 }
1058                         } elseif (
1059                                 $user instanceof User &&
1060                                 $performer->getBlock() instanceof Block &&
1061                                 $performer->getBlock()->getBy() &&
1062                                 $performer->getBlock()->getBy() === $user->getId()
1063                         ) {
1064                                 // Allow users to block the user that blocked them.
1065                                 // This is to prevent a situation where a malicious user
1066                                 // blocks all other users. This way, the non-malicious
1067                                 // user can block the malicious user back, resulting
1068                                 // in a stalemate.
1069                                 return true;
1070
1071                         } else {
1072                                 # User is trying to block/unblock someone else
1073                                 return 'ipbblocked';
1074                         }
1075                 } else {
1076                         return true;
1077                 }
1078         }
1079
1080         /**
1081          * Return a comma-delimited list of "flags" to be passed to the log
1082          * reader for this block, to provide more information in the logs
1083          * @param array $data From HTMLForm data
1084          * @param int $type Block::TYPE_ constant (USER, RANGE, or IP)
1085          * @return string
1086          */
1087         protected static function blockLogFlags( array $data, $type ) {
1088                 $config = RequestContext::getMain()->getConfig();
1089
1090                 $blockAllowsUTEdit = $config->get( 'BlockAllowsUTEdit' );
1091
1092                 $flags = [];
1093
1094                 # when blocking a user the option 'anononly' is not available/has no effect
1095                 # -> do not write this into log
1096                 if ( !$data['HardBlock'] && $type != Block::TYPE_USER ) {
1097                         // For grepping: message block-log-flags-anononly
1098                         $flags[] = 'anononly';
1099                 }
1100
1101                 if ( $data['CreateAccount'] ) {
1102                         // For grepping: message block-log-flags-nocreate
1103                         $flags[] = 'nocreate';
1104                 }
1105
1106                 # Same as anononly, this is not displayed when blocking an IP address
1107                 if ( !$data['AutoBlock'] && $type == Block::TYPE_USER ) {
1108                         // For grepping: message block-log-flags-noautoblock
1109                         $flags[] = 'noautoblock';
1110                 }
1111
1112                 if ( $data['DisableEmail'] ) {
1113                         // For grepping: message block-log-flags-noemail
1114                         $flags[] = 'noemail';
1115                 }
1116
1117                 if ( $blockAllowsUTEdit && $data['DisableUTEdit'] ) {
1118                         // For grepping: message block-log-flags-nousertalk
1119                         $flags[] = 'nousertalk';
1120                 }
1121
1122                 if ( $data['HideUser'] ) {
1123                         // For grepping: message block-log-flags-hiddenname
1124                         $flags[] = 'hiddenname';
1125                 }
1126
1127                 return implode( ',', $flags );
1128         }
1129
1130         /**
1131          * Process the form on POST submission.
1132          * @param array $data
1133          * @param HTMLForm|null $form
1134          * @return bool|array True for success, false for didn't-try, array of errors on failure
1135          */
1136         public function onSubmit( array $data, HTMLForm $form = null ) {
1137                 return self::processForm( $data, $form->getContext() );
1138         }
1139
1140         /**
1141          * Do something exciting on successful processing of the form, most likely to show a
1142          * confirmation message
1143          */
1144         public function onSuccess() {
1145                 $out = $this->getOutput();
1146                 $out->setPageTitle( $this->msg( 'blockipsuccesssub' ) );
1147                 $out->addWikiMsg( 'blockipsuccesstext', wfEscapeWikiText( $this->target ) );
1148         }
1149
1150         /**
1151          * Return an array of subpages beginning with $search that this special page will accept.
1152          *
1153          * @param string $search Prefix to search for
1154          * @param int $limit Maximum number of results to return (usually 10)
1155          * @param int $offset Number of results to skip (usually 0)
1156          * @return string[] Matching subpages
1157          */
1158         public function prefixSearchSubpages( $search, $limit, $offset ) {
1159                 $user = User::newFromName( $search );
1160                 if ( !$user ) {
1161                         // No prefix suggestion for invalid user
1162                         return [];
1163                 }
1164                 // Autocomplete subpage as user list - public to allow caching
1165                 return UserNamePrefixSearch::search( 'public', $search, $limit, $offset );
1166         }
1167
1168         protected function getGroupName() {
1169                 return 'users';
1170         }
1171 }