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( [
 398                         'mediawiki.widgets.TagMultiselectWidget.styles',
 399                         'mediawiki.special',
 400                 ] );
 401                 $this->getOutput()->addModules( [ 'mediawiki.special.block' ] );
 402
 403                 $blockCIDRLimit = $this->getConfig()->get( 'BlockCIDRLimit' );
 404                 $text = $this->msg( 'blockiptext', $blockCIDRLimit['IPv4'], $blockCIDRLimit['IPv6'] )->parse();
 405
 406                 $otherBlockMessages = [];
 407                 if ( $this->target !== null ) {
 408                         $targetName = $this->target;
 409                         if ( $this->target instanceof User ) {
 410                                 $targetName = $this->target->getName();
 411                         }
 412                         # Get other blocks, i.e. from GlobalBlocking or TorBlock extension
 413                         Hooks::run( 'OtherBlockLogLink', [ &$otherBlockMessages, $targetName ] );
 414
 415                         if ( count( $otherBlockMessages ) ) {
 416                                 $s = Html::rawElement(
 417                                         'h2',
 418                                         [],
 419                                         $this->msg( 'ipb-otherblocks-header', count( $otherBlockMessages ) )->parse()
 420                                 ) . "\n";
 421
 422                                 $list = '';
 423
 424                                 foreach ( $otherBlockMessages as $link ) {
 425                                         $list .= Html::rawElement( 'li', [], $link ) . "\n";
 426                                 }
 427
 428                                 $s .= Html::rawElement(
 429                                         'ul',
 430                                         [ 'class' => 'mw-blockip-alreadyblocked' ],
 431                                         $list
 432                                 ) . "\n";
 433
 434                                 $text .= $s;
 435                         }
 436                 }
 437
 438                 return $text;
 439         }
 440
 441         /**
 442          * Add footer elements to the form
 443          * @return string
 444          */
 445         protected function postText() {
 446                 $links = [];
 447
 448                 $this->getOutput()->addModuleStyles( 'mediawiki.special' );
 449
 450                 $linkRenderer = $this->getLinkRenderer();
 451                 # Link to the user's contributions, if applicable
 452                 if ( $this->target instanceof User ) {
 453                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $this->target->getName() );
 454                         $links[] = $linkRenderer->makeLink(
 455                                 $contribsPage,
 456                                 $this->msg( 'ipb-blocklist-contribs', $this->target->getName() )->text()
 457                         );
 458                 }
 459
 460                 # Link to unblock the specified user, or to a blank unblock form
 461                 if ( $this->target instanceof User ) {
 462                         $message = $this->msg(
 463                                 'ipb-unblock-addr',
 464                                 wfEscapeWikiText( $this->target->getName() )
 465                         )->parse();
 466                         $list = SpecialPage::getTitleFor( 'Unblock', $this->target->getName() );
 467                 } else {
 468                         $message = $this->msg( 'ipb-unblock' )->parse();
 469                         $list = SpecialPage::getTitleFor( 'Unblock' );
 470                 }
 471                 $links[] = $linkRenderer->makeKnownLink(
 472                         $list,
 473                         new HtmlArmor( $message )
 474                 );
 475
 476                 # Link to the block list
 477                 $links[] = $linkRenderer->makeKnownLink(
 478                         SpecialPage::getTitleFor( 'BlockList' ),
 479                         $this->msg( 'ipb-blocklist' )->text()
 480                 );
 481
 482                 $user = $this->getUser();
 483
 484                 # Link to edit the block dropdown reasons, if applicable
 485                 if ( $user->isAllowed( 'editinterface' ) ) {
 486                         $links[] = $linkRenderer->makeKnownLink(
 487                                 $this->msg( 'ipbreason-dropdown' )->inContentLanguage()->getTitle(),
 488                                 $this->msg( 'ipb-edit-dropdown' )->text(),
 489                                 [],
 490                                 [ 'action' => 'edit' ]
 491                         );
 492                 }
 493
 494                 $text = Html::rawElement(
 495                         'p',
 496                         [ 'class' => 'mw-ipb-conveniencelinks' ],
 497                         $this->getLanguage()->pipeList( $links )
 498                 );
 499
 500                 $userTitle = self::getTargetUserTitle( $this->target );
 501                 if ( $userTitle ) {
 502                         # Get relevant extracts from the block and suppression logs, if possible
 503                         $out = '';
 504
 505                         LogEventsList::showLogExtract(
 506                                 $out,
 507                                 'block',
 508                                 $userTitle,
 509                                 '',
 510                                 [
 511                                         'lim' => 10,
 512                                         'msgKey' => [ 'blocklog-showlog', $userTitle->getText() ],
 513                                         'showIfEmpty' => false
 514                                 ]
 515                         );
 516                         $text .= $out;
 517
 518                         # Add suppression block entries if allowed
 519                         if ( $user->isAllowed( 'suppressionlog' ) ) {
 520                                 LogEventsList::showLogExtract(
 521                                         $out,
 522                                         'suppress',
 523                                         $userTitle,
 524                                         '',
 525                                         [
 526                                                 'lim' => 10,
 527                                                 'conds' => [ 'log_action' => [ 'block', 'reblock', 'unblock' ] ],
 528                                                 'msgKey' => [ 'blocklog-showsuppresslog', $userTitle->getText() ],
 529                                                 'showIfEmpty' => false
 530                                         ]
 531                                 );
 532
 533                                 $text .= $out;
 534                         }
 535                 }
 536
 537                 return $text;
 538         }
 539
 540         /**
 541          * Get a user page target for things like logs.
 542          * This handles account and IP range targets.
 543          * @param User|string $target
 544          * @return Title|null
 545          */
 546         protected static function getTargetUserTitle( $target ) {
 547                 if ( $target instanceof User ) {
 548                         return $target->getUserPage();
 549                 } elseif ( IP::isIPAddress( $target ) ) {
 550                         return Title::makeTitleSafe( NS_USER, $target );
 551                 }
 552
 553                 return null;
 554         }
 555
 556         /**
 557          * Determine the target of the block, and the type of target
 558          * @todo Should be in Block.php?
 559          * @param string $par Subpage parameter passed to setup, or data value from
 560          *     the HTMLForm
 561          * @param WebRequest|null $request Optionally try and get data from a request too
 562          * @return array [ User|string|null, Block::TYPE_ constant|null ]
 563          */
 564         public static function getTargetAndType( $par, WebRequest $request = null ) {
 565                 $i = 0;
 566                 $target = null;
 567
 568                 while ( true ) {
 569                         switch ( $i++ ) {
 570                                 case 0:
 571                                         # The HTMLForm will check wpTarget first and only if it doesn't get
 572                                         # a value use the default, which will be generated from the options
 573                                         # below; so this has to have a higher precedence here than $par, or
 574                                         # we could end up with different values in $this->target and the HTMLForm!
 575                                         if ( $request instanceof WebRequest ) {
 576                                                 $target = $request->getText( 'wpTarget', null );
 577                                         }
 578                                         break;
 579                                 case 1:
 580                                         $target = $par;
 581                                         break;
 582                                 case 2:
 583                                         if ( $request instanceof WebRequest ) {
 584                                                 $target = $request->getText( 'ip', null );
 585                                         }
 586                                         break;
 587                                 case 3:
 588                                         # B/C @since 1.18
 589                                         if ( $request instanceof WebRequest ) {
 590                                                 $target = $request->getText( 'wpBlockAddress', null );
 591                                         }
 592                                         break;
 593                                 case 4:
 594                                         break 2;
 595                         }
 596
 597                         list( $target, $type ) = Block::parseTarget( $target );
 598
 599                         if ( $type !== null ) {
 600                                 return [ $target, $type ];
 601                         }
 602                 }
 603
 604                 return [ null, null ];
 605         }
 606
 607         /**
 608          * HTMLForm field validation-callback for Target field.
 609          * @since 1.18
 610          * @param string $value
 611          * @param array $alldata
 612          * @param HTMLForm $form
 613          * @return Message
 614          */
 615         public static function validateTargetField( $value, $alldata, $form ) {
 616                 $status = self::validateTarget( $value, $form->getUser() );
 617                 if ( !$status->isOK() ) {
 618                         $errors = $status->getErrorsArray();
 619
 620                         return $form->msg( ...$errors[0] );
 621                 } else {
 622                         return true;
 623                 }
 624         }
 625
 626         /**
 627          * Validate a block target.
 628          *
 629          * @since 1.21
 630          * @param string $value Block target to check
 631          * @param User $user Performer of the block
 632          * @return Status
 633          */
 634         public static function validateTarget( $value, User $user ) {
 635                 global $wgBlockCIDRLimit;
 636
 637                 /** @var User $target */
 638                 list( $target, $type ) = self::getTargetAndType( $value );
 639                 $status = Status::newGood( $target );
 640
 641                 if ( $type == Block::TYPE_USER ) {
 642                         if ( $target->isAnon() ) {
 643                                 $status->fatal(
 644                                         'nosuchusershort',
 645                                         wfEscapeWikiText( $target->getName() )
 646                                 );
 647                         }
 648
 649                         $unblockStatus = self::checkUnblockSelf( $target, $user );
 650                         if ( $unblockStatus !== true ) {
 651                                 $status->fatal( 'badaccess', $unblockStatus );
 652                         }
 653                 } elseif ( $type == Block::TYPE_RANGE ) {
 654                         list( $ip, $range ) = explode( '/', $target, 2 );
 655
 656                         if (
 657                                 ( IP::isIPv4( $ip ) && $wgBlockCIDRLimit['IPv4'] == 32 ) ||
 658                                 ( IP::isIPv6( $ip ) && $wgBlockCIDRLimit['IPv6'] == 128 )
 659                         ) {
 660                                 // Range block effectively disabled
 661                                 $status->fatal( 'range_block_disabled' );
 662                         }
 663
 664                         if (
 665                                 ( IP::isIPv4( $ip ) && $range > 32 ) ||
 666                                 ( IP::isIPv6( $ip ) && $range > 128 )
 667                         ) {
 668                                 // Dodgy range
 669                                 $status->fatal( 'ip_range_invalid' );
 670                         }
 671
 672                         if ( IP::isIPv4( $ip ) && $range < $wgBlockCIDRLimit['IPv4'] ) {
 673                                 $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv4'] );
 674                         }
 675
 676                         if ( IP::isIPv6( $ip ) && $range < $wgBlockCIDRLimit['IPv6'] ) {
 677                                 $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv6'] );
 678                         }
 679                 } elseif ( $type == Block::TYPE_IP ) {
 680                         # All is well
 681                 } else {
 682                         $status->fatal( 'badipaddress' );
 683                 }
 684
 685                 return $status;
 686         }
 687
 688         /**
 689          * Given the form data, actually implement a block. This is also called from ApiBlock.
 690          *
 691          * @param array $data
 692          * @param IContextSource $context
 693          * @return bool|string
 694          */
 695         public static function processForm( array $data, IContextSource $context ) {
 696                 global $wgBlockAllowsUTEdit, $wgHideUserContribLimit;
 697
 698                 $performer = $context->getUser();
 699                 $enablePartialBlocks = $context->getConfig()->get( 'EnablePartialBlocks' );
 700
 701                 // Handled by field validator callback
 702                 // self::validateTargetField( $data['Target'] );
 703
 704                 # This might have been a hidden field or a checkbox, so interesting data
 705                 # can come from it
 706                 $data['Confirm'] = !in_array( $data['Confirm'], [ '', '0', null, false ], true );
 707
 708                 /** @var User $target */
 709                 list( $target, $type ) = self::getTargetAndType( $data['Target'] );
 710                 if ( $type == Block::TYPE_USER ) {
 711                         $user = $target;
 712                         $target = $user->getName();
 713                         $userId = $user->getId();
 714
 715                         # Give admins a heads-up before they go and block themselves.  Much messier
 716                         # to do this for IPs, but it's pretty unlikely they'd ever get the 'block'
 717                         # permission anyway, although the code does allow for it.
 718                         # Note: Important to use $target instead of $data['Target']
 719                         # since both $data['PreviousTarget'] and $target are normalized
 720                         # but $data['target'] gets overridden by (non-normalized) request variable
 721                         # from previous request.
 722                         if ( $target === $performer->getName() &&
 723                                 ( $data['PreviousTarget'] !== $target || !$data['Confirm'] )
 724                         ) {
 725                                 return [ 'ipb-blockingself', 'ipb-confirmaction' ];
 726                         }
 727                 } elseif ( $type == Block::TYPE_RANGE ) {
 728                         $user = null;
 729                         $userId = 0;
 730                 } elseif ( $type == Block::TYPE_IP ) {
 731                         $user = null;
 732                         $target = $target->getName();
 733                         $userId = 0;
 734                 } else {
 735                         # This should have been caught in the form field validation
 736                         return [ 'badipaddress' ];
 737                 }
 738
 739                 $expiryTime = self::parseExpiryInput( $data['Expiry'] );
 740
 741                 if (
 742                         // an expiry time is needed
 743                         ( strlen( $data['Expiry'] ) == 0 ) ||
 744                         // can't be a larger string as 50 (it should be a time format in any way)
 745                         ( strlen( $data['Expiry'] ) > 50 ) ||
 746                         // check, if the time could be parsed
 747                         !$expiryTime
 748                 ) {
 749                         return [ 'ipb_expiry_invalid' ];
 750                 }
 751
 752                 // an expiry time should be in the future, not in the
 753                 // past (wouldn't make any sense) - bug T123069
 754                 if ( $expiryTime < wfTimestampNow() ) {
 755                         return [ 'ipb_expiry_old' ];
 756                 }
 757
 758                 if ( !isset( $data['DisableEmail'] ) ) {
 759                         $data['DisableEmail'] = false;
 760                 }
 761
 762                 # If the user has done the form 'properly', they won't even have been given the
 763                 # option to suppress-block unless they have the 'hideuser' permission
 764                 if ( !isset( $data['HideUser'] ) ) {
 765                         $data['HideUser'] = false;
 766                 }
 767
 768                 if ( $data['HideUser'] ) {
 769                         if ( !$performer->isAllowed( 'hideuser' ) ) {
 770                                 # this codepath is unreachable except by a malicious user spoofing forms,
 771                                 # or by race conditions (user has hideuser and block rights, loads block form,
 772                                 # and loses hideuser rights before submission); so need to fail completely
 773                                 # rather than just silently disable hiding
 774                                 return [ 'badaccess-group0' ];
 775                         }
 776
 777                         # Recheck params here...
 778                         if ( $type != Block::TYPE_USER ) {
 779                                 $data['HideUser'] = false; # IP users should not be hidden
 780                         } elseif ( !wfIsInfinity( $data['Expiry'] ) ) {
 781                                 # Bad expiry.
 782                                 return [ 'ipb_expiry_temp' ];
 783                         } elseif ( $wgHideUserContribLimit !== false
 784                                 && $user->getEditCount() > $wgHideUserContribLimit
 785                         ) {
 786                                 # Typically, the user should have a handful of edits.
 787                                 # Disallow hiding users with many edits for performance.
 788                                 return [ [ 'ipb_hide_invalid',
 789                                         Message::numParam( $wgHideUserContribLimit ) ] ];
 790                         } elseif ( !$data['Confirm'] ) {
 791                                 return [ 'ipb-confirmhideuser', 'ipb-confirmaction' ];
 792                         }
 793                 }
 794
 795                 # Create block object.
 796                 $block = new Block();
 797                 $block->setTarget( $target );
 798                 $block->setBlocker( $performer );
 799                 $block->mReason = $data['Reason'][0];
 800                 $block->mExpiry = $expiryTime;
 801                 $block->prevents( 'createaccount', $data['CreateAccount'] );
 802                 $block->prevents( 'editownusertalk', ( !$wgBlockAllowsUTEdit || $data['DisableUTEdit'] ) );
 803                 $block->prevents( 'sendemail', $data['DisableEmail'] );
 804                 $block->isHardblock( $data['HardBlock'] );
 805                 $block->isAutoblocking( $data['AutoBlock'] );
 806                 $block->mHideName = $data['HideUser'];
 807
 808                 if (
 809                         $enablePartialBlocks &&
 810                         isset( $data['EditingRestriction'] ) &&
 811                         $data['EditingRestriction'] === 'partial'
 812                  ) {
 813                          $block->isSitewide( false );
 814                 }
 815
 816                 $reason = [ 'hookaborted' ];
 817                 if ( !Hooks::run( 'BlockIp', [ &$block, &$performer, &$reason ] ) ) {
 818                         return $reason;
 819                 }
 820
 821                 $restrictions = [];
 822                 if ( $enablePartialBlocks ) {
 823                         if ( !empty( $data['PageRestrictions'] ) ) {
 824                                 $restrictions = array_map( function ( $text ) {
 825                                         $title = Title::newFromText( $text );
 826                                         // Use the link cache since the title has already been loaded when
 827                                         // the field was validated.
 828                                         $restriction = new PageRestriction( 0, $title->getArticleId() );
 829                                         $restriction->setTitle( $title );
 830                                         return $restriction;
 831                                 }, explode( "\n", $data['PageRestrictions'] ) );
 832                         }
 833
 834                         $block->setRestrictions( $restrictions );
 835                 }
 836
 837                 $priorBlock = null;
 838                 # Try to insert block. Is there a conflicting block?
 839                 $status = $block->insert();
 840                 if ( !$status ) {
 841                         # Indicates whether the user is confirming the block and is aware of
 842                         # the conflict (did not change the block target in the meantime)
 843                         $blockNotConfirmed = !$data['Confirm'] || ( array_key_exists( 'PreviousTarget', $data )
 844                                 && $data['PreviousTarget'] !== $target );
 845
 846                         # Special case for API - T34434
 847                         $reblockNotAllowed = ( array_key_exists( 'Reblock', $data ) && !$data['Reblock'] );
 848
 849                         # Show form unless the user is already aware of this...
 850                         if ( $blockNotConfirmed || $reblockNotAllowed ) {
 851                                 return [ [ 'ipb_already_blocked', $block->getTarget() ] ];
 852                                 # Otherwise, try to update the block...
 853                         } else {
 854                                 # This returns direct blocks before autoblocks/rangeblocks, since we should
 855                                 # be sure the user is blocked by now it should work for our purposes
 856                                 $currentBlock = Block::newFromTarget( $target );
 857                                 if ( $block->equals( $currentBlock ) ) {
 858                                         return [ [ 'ipb_already_blocked', $block->getTarget() ] ];
 859                                 }
 860                                 # If the name was hidden and the blocking user cannot hide
 861                                 # names, then don't allow any block changes...
 862                                 if ( $currentBlock->mHideName && !$performer->isAllowed( 'hideuser' ) ) {
 863                                         return [ 'cant-see-hidden-user' ];
 864                                 }
 865
 866                                 $priorBlock = clone $currentBlock;
 867                                 $currentBlock->isHardblock( $block->isHardblock() );
 868                                 $currentBlock->prevents( 'createaccount', $block->prevents( 'createaccount' ) );
 869                                 $currentBlock->mExpiry = $block->mExpiry;
 870                                 $currentBlock->isAutoblocking( $block->isAutoblocking() );
 871                                 $currentBlock->mHideName = $block->mHideName;
 872                                 $currentBlock->prevents( 'sendemail', $block->prevents( 'sendemail' ) );
 873                                 $currentBlock->prevents( 'editownusertalk', $block->prevents( 'editownusertalk' ) );
 874                                 $currentBlock->mReason = $block->mReason;
 875
 876                                 if ( $enablePartialBlocks ) {
 877                                         // Maintain the sitewide status. If partial blocks is not enabled,
 878                                         // saving the block will result in a sitewide block.
 879                                         $currentBlock->isSitewide( $block->isSitewide() );
 880
 881                                         // Set the block id of the restrictions.
 882                                         $currentBlock->setRestrictions(
 883                                                 BlockRestriction::setBlockId( $currentBlock->getId(), $restrictions )
 884                                         );
 885                                 }
 886
 887                                 $status = $currentBlock->update();
 888                                 // TODO handle failure
 889
 890                                 $logaction = 'reblock';
 891
 892                                 # Unset _deleted fields if requested
 893                                 if ( $currentBlock->mHideName && !$data['HideUser'] ) {
 894                                         RevisionDeleteUser::unsuppressUserName( $target, $userId );
 895                                 }
 896
 897                                 # If hiding/unhiding a name, this should go in the private logs
 898                                 if ( (bool)$currentBlock->mHideName ) {
 899                                         $data['HideUser'] = true;
 900                                 }
 901
 902                                 $block = $currentBlock;
 903                         }
 904                 } else {
 905                         $logaction = 'block';
 906                 }
 907
 908                 Hooks::run( 'BlockIpComplete', [ $block, $performer, $priorBlock ] );
 909
 910                 # Set *_deleted fields if requested
 911                 if ( $data['HideUser'] ) {
 912                         RevisionDeleteUser::suppressUserName( $target, $userId );
 913                 }
 914
 915                 # Can't watch a rangeblock
 916                 if ( $type != Block::TYPE_RANGE && $data['Watch'] ) {
 917                         WatchAction::doWatch(
 918                                 Title::makeTitle( NS_USER, $target ),
 919                                 $performer,
 920                                 User::IGNORE_USER_RIGHTS
 921                         );
 922                 }
 923
 924                 # Block constructor sanitizes certain block options on insert
 925                 $data['BlockEmail'] = $block->prevents( 'sendemail' );
 926                 $data['AutoBlock'] = $block->isAutoblocking();
 927
 928                 # Prepare log parameters
 929                 $logParams = [];
 930                 $logParams['5::duration'] = $data['Expiry'];
 931                 $logParams['6::flags'] = self::blockLogFlags( $data, $type );
 932                 $logParams['sitewide'] = $block->isSitewide();
 933
 934                 if ( $enablePartialBlocks && !empty( $data['PageRestrictions'] ) ) {
 935                         $logParams['7::restrictions'] = [
 936                                 'pages' => explode( "\n", $data['PageRestrictions'] ),
 937                         ];
 938                 }
 939
 940                 # Make log entry, if the name is hidden, put it in the suppression log
 941                 $log_type = $data['HideUser'] ? 'suppress' : 'block';
 942                 $logEntry = new ManualLogEntry( $log_type, $logaction );
 943                 $logEntry->setTarget( Title::makeTitle( NS_USER, $target ) );
 944                 $logEntry->setComment( $data['Reason'][0] );
 945                 $logEntry->setPerformer( $performer );
 946                 $logEntry->setParameters( $logParams );
 947                 # Relate log ID to block ID (T27763)
 948                 $logEntry->setRelations( [ 'ipb_id' => $block->getId() ] );
 949                 $logId = $logEntry->insert();
 950
 951                 if ( !empty( $data['Tags'] ) ) {
 952                         $logEntry->setTags( $data['Tags'] );
 953                 }
 954
 955                 $logEntry->publish( $logId );
 956
 957                 return true;
 958         }
 959
 960         /**
 961          * Get an array of suggested block durations from MediaWiki:Ipboptions
 962          * @todo FIXME: This uses a rather odd syntax for the options, should it be converted
 963          *     to the standard "**<duration>|<displayname>" format?
 964          * @param Language|null $lang The language to get the durations in, or null to use
 965          *     the wiki's content language
 966          * @param bool $includeOther Whether to include the 'other' option in the list of
 967          *     suggestions
 968          * @return array
 969          */
 970         public static function getSuggestedDurations( Language $lang = null, $includeOther = true ) {
 971                 $a = [];
 972                 $msg = $lang === null
 973                         ? wfMessage( 'ipboptions' )->inContentLanguage()->text()
 974                         : wfMessage( 'ipboptions' )->inLanguage( $lang )->text();
 975
 976                 if ( $msg == '-' ) {
 977                         return [];
 978                 }
 979
 980                 foreach ( explode( ',', $msg ) as $option ) {
 981                         if ( strpos( $option, ':' ) === false ) {
 982                                 $option = "$option:$option";
 983                         }
 984
 985                         list( $show, $value ) = explode( ':', $option );
 986                         $a[$show] = $value;
 987                 }
 988
 989                 if ( $a && $includeOther ) {
 990                         // if options exist, add other to the end instead of the begining (which
 991                         // is what happens by default).
 992                         $a[ wfMessage( 'ipbother' )->text() ] = 'other';
 993                 }
 994
 995                 return $a;
 996         }
 997
 998         /**
 999          * Convert a submitted expiry time, which may be relative ("2 weeks", etc) or absolute
1000          * ("24 May 2034", etc), into an absolute timestamp we can put into the database.
1001          *
1002          * @todo strtotime() only accepts English strings. This means the expiry input
1003          *       can only be specified in English.
1004          * @see https://secure.php.net/manual/en/function.strtotime.php
1005          *
1006          * @param string $expiry Whatever was typed into the form
1007          * @return string|bool Timestamp or 'infinity' or false on error.
1008          */
1009         public static function parseExpiryInput( $expiry ) {
1010                 if ( wfIsInfinity( $expiry ) ) {
1011                         return 'infinity';
1012                 }
1013
1014                 $expiry = strtotime( $expiry );
1015
1016                 if ( $expiry < 0 || $expiry === false ) {
1017                         return false;
1018                 }
1019
1020                 return wfTimestamp( TS_MW, $expiry );
1021         }
1022
1023         /**
1024          * Can we do an email block?
1025          * @param User $user The sysop wanting to make a block
1026          * @return bool
1027          */
1028         public static function canBlockEmail( $user ) {
1029                 global $wgEnableUserEmail, $wgSysopEmailBans;
1030
1031                 return ( $wgEnableUserEmail && $wgSysopEmailBans && $user->isAllowed( 'blockemail' ) );
1032         }
1033
1034         /**
1035          * T17810: blocked admins should not be able to block/unblock
1036          * others, and probably shouldn't be able to unblock themselves
1037          * either.
1038          *
1039          * Exception: Users can block the user who blocked them, to reduce
1040          * advantage of a malicious account blocking all admins (T150826)
1041          *
1042          * @param User|int|string|null $target Target to block or unblock; could be a User object,
1043          *   or a user ID or username, or null when the target is not known yet (e.g. when
1044          *   displaying Special:Block)
1045          * @param User $performer User doing the request
1046          * @return bool|string True or error message key
1047          */
1048         public static function checkUnblockSelf( $target, User $performer ) {
1049                 if ( is_int( $target ) ) {
1050                         $target = User::newFromId( $target );
1051                 } elseif ( is_string( $target ) ) {
1052                         $target = User::newFromName( $target );
1053                 }
1054                 if ( $performer->isBlocked() ) {
1055                         if ( $target instanceof User && $target->getId() == $performer->getId() ) {
1056                                 # User is trying to unblock themselves
1057                                 if ( $performer->isAllowed( 'unblockself' ) ) {
1058                                         return true;
1059                                         # User blocked themselves and is now trying to reverse it
1060                                 } elseif ( $performer->blockedBy() === $performer->getName() ) {
1061                                         return true;
1062                                 } else {
1063                                         return 'ipbnounblockself';
1064                                 }
1065                         } elseif (
1066                                 $target instanceof User &&
1067                                 $performer->getBlock() instanceof Block &&
1068                                 $performer->getBlock()->getBy() &&
1069                                 $performer->getBlock()->getBy() === $target->getId()
1070                         ) {
1071                                 // Allow users to block the user that blocked them.
1072                                 // This is to prevent a situation where a malicious user
1073                                 // blocks all other users. This way, the non-malicious
1074                                 // user can block the malicious user back, resulting
1075                                 // in a stalemate.
1076                                 return true;
1077
1078                         } else {
1079                                 # User is trying to block/unblock someone else
1080                                 return 'ipbblocked';
1081                         }
1082                 } else {
1083                         return true;
1084                 }
1085         }
1086
1087         /**
1088          * Return a comma-delimited list of "flags" to be passed to the log
1089          * reader for this block, to provide more information in the logs
1090          * @param array $data From HTMLForm data
1091          * @param int $type Block::TYPE_ constant (USER, RANGE, or IP)
1092          * @return string
1093          */
1094         protected static function blockLogFlags( array $data, $type ) {
1095                 $config = RequestContext::getMain()->getConfig();
1096
1097                 $blockAllowsUTEdit = $config->get( 'BlockAllowsUTEdit' );
1098
1099                 $flags = [];
1100
1101                 # when blocking a user the option 'anononly' is not available/has no effect
1102                 # -> do not write this into log
1103                 if ( !$data['HardBlock'] && $type != Block::TYPE_USER ) {
1104                         // For grepping: message block-log-flags-anononly
1105                         $flags[] = 'anononly';
1106                 }
1107
1108                 if ( $data['CreateAccount'] ) {
1109                         // For grepping: message block-log-flags-nocreate
1110                         $flags[] = 'nocreate';
1111                 }
1112
1113                 # Same as anononly, this is not displayed when blocking an IP address
1114                 if ( !$data['AutoBlock'] && $type == Block::TYPE_USER ) {
1115                         // For grepping: message block-log-flags-noautoblock
1116                         $flags[] = 'noautoblock';
1117                 }
1118
1119                 if ( $data['DisableEmail'] ) {
1120                         // For grepping: message block-log-flags-noemail
1121                         $flags[] = 'noemail';
1122                 }
1123
1124                 if ( $blockAllowsUTEdit && $data['DisableUTEdit'] ) {
1125                         // For grepping: message block-log-flags-nousertalk
1126                         $flags[] = 'nousertalk';
1127                 }
1128
1129                 if ( $data['HideUser'] ) {
1130                         // For grepping: message block-log-flags-hiddenname
1131                         $flags[] = 'hiddenname';
1132                 }
1133
1134                 return implode( ',', $flags );
1135         }
1136
1137         /**
1138          * Process the form on POST submission.
1139          * @param array $data
1140          * @param HTMLForm|null $form
1141          * @return bool|array True for success, false for didn't-try, array of errors on failure
1142          */
1143         public function onSubmit( array $data, HTMLForm $form = null ) {
1144                 return self::processForm( $data, $form->getContext() );
1145         }
1146
1147         /**
1148          * Do something exciting on successful processing of the form, most likely to show a
1149          * confirmation message
1150          */
1151         public function onSuccess() {
1152                 $out = $this->getOutput();
1153                 $out->setPageTitle( $this->msg( 'blockipsuccesssub' ) );
1154                 $out->addWikiMsg( 'blockipsuccesstext', wfEscapeWikiText( $this->target ) );
1155         }
1156
1157         /**
1158          * Return an array of subpages beginning with $search that this special page will accept.
1159          *
1160          * @param string $search Prefix to search for
1161          * @param int $limit Maximum number of results to return (usually 10)
1162          * @param int $offset Number of results to skip (usually 0)
1163          * @return string[] Matching subpages
1164          */
1165         public function prefixSearchSubpages( $search, $limit, $offset ) {
1166                 $user = User::newFromName( $search );
1167                 if ( !$user ) {
1168                         // No prefix suggestion for invalid user
1169                         return [];
1170                 }
1171                 // Autocomplete subpage as user list - public to allow caching
1172                 return UserNamePrefixSearch::search( 'public', $search, $limit, $offset );
1173         }
1174
1175         protected function getGroupName() {
1176                 return 'users';
1177         }
1178 }