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
  70                 # T17810: blocked admins should have limited access here
  71                 $status = self::checkUnblockSelf( $this->target, $user );
  72                 if ( $status !== true ) {
  73                         throw new ErrorPageError( 'badaccess', $status );
  74                 }
  75         }
  76
  77         /**
  78          * Handle some magic here
  79          *
  80          * @param string $par
  81          */
  82         protected function setParameter( $par ) {
  83                 # Extract variables from the request.  Try not to get into a situation where we
  84                 # need to extract *every* variable from the form just for processing here, but
  85                 # there are legitimate uses for some variables
  86                 $request = $this->getRequest();
  87                 list( $this->target, $this->type ) = self::getTargetAndType( $par, $request );
  88                 if ( $this->target instanceof User ) {
  89                         # Set the 'relevant user' in the skin, so it displays links like Contributions,
  90                         # User logs, UserRights, etc.
  91                         $this->getSkin()->setRelevantUser( $this->target );
  92                 }
  93
  94                 list( $this->previousTarget, /*...*/ ) =
  95                         Block::parseTarget( $request->getVal( 'wpPreviousTarget' ) );
  96                 $this->requestedHideUser = $request->getBool( 'wpHideUser' );
  97         }
  98
  99         /**
 100          * Customizes the HTMLForm a bit
 101          *
 102          * @param HTMLForm $form
 103          */
 104         protected function alterForm( HTMLForm $form ) {
 105                 $form->setHeaderText( '' );
 106                 $form->setSubmitDestructive();
 107
 108                 $msg = $this->alreadyBlocked ? 'ipb-change-block' : 'ipbsubmit';
 109                 $form->setSubmitTextMsg( $msg );
 110
 111                 $this->addHelpLink( 'Help:Blocking users' );
 112
 113                 # Don't need to do anything if the form has been posted
 114                 if ( !$this->getRequest()->wasPosted() && $this->preErrors ) {
 115                         $s = $form->formatErrors( $this->preErrors );
 116                         if ( $s ) {
 117                                 $form->addHeaderText( Html::rawElement(
 118                                         'div',
 119                                         [ 'class' => 'error' ],
 120                                         $s
 121                                 ) );
 122                         }
 123                 }
 124         }
 125
 126         protected function getDisplayFormat() {
 127                 return 'ooui';
 128         }
 129
 130         /**
 131          * Get the HTMLForm descriptor array for the block form
 132          * @return array
 133          */
 134         protected function getFormFields() {
 135                 global $wgBlockAllowsUTEdit;
 136
 137                 $user = $this->getUser();
 138
 139                 $suggestedDurations = self::getSuggestedDurations();
 140
 141                 $conf = $this->getConfig();
 142                 $oldCommentSchema = $conf->get( 'CommentTableSchemaMigrationStage' ) === MIGRATION_OLD;
 143                 $enablePartialBlocks = $conf->get( 'EnablePartialBlocks' );
 144
 145                 $a = [];
 146
 147                 $a['Target'] = [
 148                         'type' => 'user',
 149                         'ipallowed' => true,
 150                         'iprange' => true,
 151                         'label-message' => 'ipaddressorusername',
 152                         'id' => 'mw-bi-target',
 153                         'size' => '45',
 154                         'autofocus' => true,
 155                         'required' => true,
 156                         'validation-callback' => [ __CLASS__, 'validateTargetField' ],
 157                 ];
 158
 159                 if ( $enablePartialBlocks ) {
 160                         $a['EditingRestriction'] = [
 161                                 'type' => 'radio',
 162                                 'label' => $this->msg( 'ipb-type-label' )->text(),
 163                                 'options' => [
 164                                         $this->msg( 'ipb-sitewide' )->text() => 'sitewide',
 165                                         $this->msg( 'ipb-partial' )->text() => 'partial',
 166                                 ],
 167                         ];
 168                         $a['PageRestrictions'] = [
 169                                 'type' => 'titlesmultiselect',
 170                                 'label' => $this->msg( 'ipb-pages-label' )->text(),
 171                                 'exists' => true,
 172                                 'max' => 10,
 173                                 'cssclass' => 'mw-block-page-restrictions',
 174                         ];
 175                 }
 176
 177                 $a['Expiry'] = [
 178                         'type' => 'expiry',
 179                         'label-message' => 'ipbexpiry',
 180                         'required' => true,
 181                         'options' => $suggestedDurations,
 182                         'default' => $this->msg( 'ipb-default-expiry' )->inContentLanguage()->text(),
 183                 ];
 184
 185                 $a['Reason'] = [
 186                         'type' => 'selectandother',
 187                         // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
 188                         // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
 189                         // Unicode codepoints (or 255 UTF-8 bytes for old schema).
 190                         'maxlength' => $oldCommentSchema ? 255 : CommentStore::COMMENT_CHARACTER_LIMIT,
 191                         'maxlength-unit' => 'codepoints',
 192                         'label-message' => 'ipbreason',
 193                         'options-message' => 'ipbreason-dropdown',
 194                 ];
 195
 196                 $a['CreateAccount'] = [
 197                         'type' => 'check',
 198                         'label-message' => 'ipbcreateaccount',
 199                         'default' => true,
 200                 ];
 201
 202                 if ( self::canBlockEmail( $user ) ) {
 203                         $a['DisableEmail'] = [
 204                                 'type' => 'check',
 205                                 'label-message' => 'ipbemailban',
 206                         ];
 207                 }
 208
 209                 if ( $wgBlockAllowsUTEdit ) {
 210                         $a['DisableUTEdit'] = [
 211                                 'type' => 'check',
 212                                 'label-message' => 'ipb-disableusertalk',
 213                                 'default' => false,
 214                         ];
 215                 }
 216
 217                 $a['AutoBlock'] = [
 218                         'type' => 'check',
 219                         'label-message' => 'ipbenableautoblock',
 220                         'default' => true,
 221                 ];
 222
 223                 # Allow some users to hide name from block log, blocklist and listusers
 224                 if ( $user->isAllowed( 'hideuser' ) ) {
 225                         $a['HideUser'] = [
 226                                 'type' => 'check',
 227                                 'label-message' => 'ipbhidename',
 228                                 'cssclass' => 'mw-block-hideuser',
 229                         ];
 230                 }
 231
 232                 # Watchlist their user page? (Only if user is logged in)
 233                 if ( $user->isLoggedIn() ) {
 234                         $a['Watch'] = [
 235                                 'type' => 'check',
 236                                 'label-message' => 'ipbwatchuser',
 237                         ];
 238                 }
 239
 240                 $a['HardBlock'] = [
 241                         'type' => 'check',
 242                         'label-message' => 'ipb-hardblock',
 243                         'default' => false,
 244                 ];
 245
 246                 # This is basically a copy of the Target field, but the user can't change it, so we
 247                 # can see if the warnings we maybe showed to the user before still apply
 248                 $a['PreviousTarget'] = [
 249                         'type' => 'hidden',
 250                         'default' => false,
 251                 ];
 252
 253                 # We'll turn this into a checkbox if we need to
 254                 $a['Confirm'] = [
 255                         'type' => 'hidden',
 256                         'default' => '',
 257                         'label-message' => 'ipb-confirm',
 258                         'cssclass' => 'mw-block-confirm',
 259                 ];
 260
 261                 $this->maybeAlterFormDefaults( $a );
 262
 263                 // Allow extensions to add more fields
 264                 Hooks::run( 'SpecialBlockModifyFormFields', [ $this, &$a ] );
 265
 266                 return $a;
 267         }
 268
 269         /**
 270          * If the user has already been blocked with similar settings, load that block
 271          * and change the defaults for the form fields to match the existing settings.
 272          * @param array &$fields HTMLForm descriptor array
 273          * @return bool Whether fields were altered (that is, whether the target is
 274          *     already blocked)
 275          */
 276         protected function maybeAlterFormDefaults( &$fields ) {
 277                 # This will be overwritten by request data
 278                 $fields['Target']['default'] = (string)$this->target;
 279
 280                 if ( $this->target ) {
 281                         $status = self::validateTarget( $this->target, $this->getUser() );
 282                         if ( !$status->isOK() ) {
 283                                 $errors = $status->getErrorsArray();
 284                                 $this->preErrors = array_merge( $this->preErrors, $errors );
 285                         }
 286                 }
 287
 288                 # This won't be
 289                 $fields['PreviousTarget']['default'] = (string)$this->target;
 290
 291                 $block = Block::newFromTarget( $this->target );
 292
 293                 if ( $block instanceof Block && !$block->mAuto # The block exists and isn't an autoblock
 294                         && ( $this->type != Block::TYPE_RANGE # The block isn't a rangeblock
 295                                 || $block->getTarget() == $this->target ) # or if it is, the range is what we're about to block
 296                 ) {
 297                         $fields['HardBlock']['default'] = $block->isHardblock();
 298                         $fields['CreateAccount']['default'] = $block->prevents( 'createaccount' );
 299                         $fields['AutoBlock']['default'] = $block->isAutoblocking();
 300
 301                         if ( isset( $fields['DisableEmail'] ) ) {
 302                                 $fields['DisableEmail']['default'] = $block->prevents( 'sendemail' );
 303                         }
 304
 305                         if ( isset( $fields['HideUser'] ) ) {
 306                                 $fields['HideUser']['default'] = $block->mHideName;
 307                         }
 308
 309                         if ( isset( $fields['DisableUTEdit'] ) ) {
 310                                 $fields['DisableUTEdit']['default'] = $block->prevents( 'editownusertalk' );
 311                         }
 312
 313                         // If the username was hidden (ipb_deleted == 1), don't show the reason
 314                         // unless this user also has rights to hideuser: T37839
 315                         if ( !$block->mHideName || $this->getUser()->isAllowed( 'hideuser' ) ) {
 316                                 $fields['Reason']['default'] = $block->mReason;
 317                         } else {
 318                                 $fields['Reason']['default'] = '';
 319                         }
 320
 321                         if ( $this->getRequest()->wasPosted() ) {
 322                                 # Ok, so we got a POST submission asking us to reblock a user.  So show the
 323                                 # confirm checkbox; the user will only see it if they haven't previously
 324                                 $fields['Confirm']['type'] = 'check';
 325                         } else {
 326                                 # We got a target, but it wasn't a POST request, so the user must have gone
 327                                 # to a link like [[Special:Block/User]].  We don't need to show the checkbox
 328                                 # as long as they go ahead and block *that* user
 329                                 $fields['Confirm']['default'] = 1;
 330                         }
 331
 332                         if ( $block->mExpiry == 'infinity' ) {
 333                                 $fields['Expiry']['default'] = 'infinite';
 334                         } else {
 335                                 $fields['Expiry']['default'] = wfTimestamp( TS_RFC2822, $block->mExpiry );
 336                         }
 337
 338                         $this->alreadyBlocked = true;
 339                         $this->preErrors[] = [ 'ipb-needreblock', wfEscapeWikiText( (string)$block->getTarget() ) ];
 340                 }
 341
 342                 # We always need confirmation to do HideUser
 343                 if ( $this->requestedHideUser ) {
 344                         $fields['Confirm']['type'] = 'check';
 345                         unset( $fields['Confirm']['default'] );
 346                         $this->preErrors[] = [ 'ipb-confirmhideuser', 'ipb-confirmaction' ];
 347                 }
 348
 349                 # Or if the user is trying to block themselves
 350                 if ( (string)$this->target === $this->getUser()->getName() ) {
 351                         $fields['Confirm']['type'] = 'check';
 352                         unset( $fields['Confirm']['default'] );
 353                         $this->preErrors[] = [ 'ipb-blockingself', 'ipb-confirmaction' ];
 354                 }
 355
 356                 if ( $this->getConfig()->get( 'EnablePartialBlocks' ) ) {
 357                         if ( $block instanceof Block && !$block->isSitewide() ) {
 358                                 $fields['EditingRestriction']['default'] = 'partial';
 359                         } else {
 360                                 $fields['EditingRestriction']['default'] = 'sitewide';
 361                         }
 362
 363                         if ( $block instanceof Block ) {
 364                                 $pageRestrictions = [];
 365                                 foreach ( $block->getRestrictions() as $restriction ) {
 366                                         if ( $restriction->getType() !== 'page' ) {
 367                                                 continue;
 368                                         }
 369
 370                                         $pageRestrictions[] = $restriction->getTitle()->getPrefixedText();
 371                                 }
 372
 373                                 // Sort the restrictions so they are in alphabetical order.
 374                                 sort( $pageRestrictions );
 375                                 $fields['PageRestrictions']['default'] = implode( "\n", $pageRestrictions );
 376                         }
 377                 }
 378         }
 379
 380         /**
 381          * Add header elements like block log entries, etc.
 382          * @return string
 383          */
 384         protected function preText() {
 385                 $this->getOutput()->addModules( [ 'mediawiki.special.block' ] );
 386
 387                 $blockCIDRLimit = $this->getConfig()->get( 'BlockCIDRLimit' );
 388                 $text = $this->msg( 'blockiptext', $blockCIDRLimit['IPv4'], $blockCIDRLimit['IPv6'] )->parse();
 389
 390                 $otherBlockMessages = [];
 391                 if ( $this->target !== null ) {
 392                         $targetName = $this->target;
 393                         if ( $this->target instanceof User ) {
 394                                 $targetName = $this->target->getName();
 395                         }
 396                         # Get other blocks, i.e. from GlobalBlocking or TorBlock extension
 397                         Hooks::run( 'OtherBlockLogLink', [ &$otherBlockMessages, $targetName ] );
 398
 399                         if ( count( $otherBlockMessages ) ) {
 400                                 $s = Html::rawElement(
 401                                         'h2',
 402                                         [],
 403                                         $this->msg( 'ipb-otherblocks-header', count( $otherBlockMessages ) )->parse()
 404                                 ) . "\n";
 405
 406                                 $list = '';
 407
 408                                 foreach ( $otherBlockMessages as $link ) {
 409                                         $list .= Html::rawElement( 'li', [], $link ) . "\n";
 410                                 }
 411
 412                                 $s .= Html::rawElement(
 413                                         'ul',
 414                                         [ 'class' => 'mw-blockip-alreadyblocked' ],
 415                                         $list
 416                                 ) . "\n";
 417
 418                                 $text .= $s;
 419                         }
 420                 }
 421
 422                 return $text;
 423         }
 424
 425         /**
 426          * Add footer elements to the form
 427          * @return string
 428          */
 429         protected function postText() {
 430                 $links = [];
 431
 432                 $this->getOutput()->addModuleStyles( 'mediawiki.special' );
 433
 434                 $linkRenderer = $this->getLinkRenderer();
 435                 # Link to the user's contributions, if applicable
 436                 if ( $this->target instanceof User ) {
 437                         $contribsPage = SpecialPage::getTitleFor( 'Contributions', $this->target->getName() );
 438                         $links[] = $linkRenderer->makeLink(
 439                                 $contribsPage,
 440                                 $this->msg( 'ipb-blocklist-contribs', $this->target->getName() )->text()
 441                         );
 442                 }
 443
 444                 # Link to unblock the specified user, or to a blank unblock form
 445                 if ( $this->target instanceof User ) {
 446                         $message = $this->msg(
 447                                 'ipb-unblock-addr',
 448                                 wfEscapeWikiText( $this->target->getName() )
 449                         )->parse();
 450                         $list = SpecialPage::getTitleFor( 'Unblock', $this->target->getName() );
 451                 } else {
 452                         $message = $this->msg( 'ipb-unblock' )->parse();
 453                         $list = SpecialPage::getTitleFor( 'Unblock' );
 454                 }
 455                 $links[] = $linkRenderer->makeKnownLink(
 456                         $list,
 457                         new HtmlArmor( $message )
 458                 );
 459
 460                 # Link to the block list
 461                 $links[] = $linkRenderer->makeKnownLink(
 462                         SpecialPage::getTitleFor( 'BlockList' ),
 463                         $this->msg( 'ipb-blocklist' )->text()
 464                 );
 465
 466                 $user = $this->getUser();
 467
 468                 # Link to edit the block dropdown reasons, if applicable
 469                 if ( $user->isAllowed( 'editinterface' ) ) {
 470                         $links[] = $linkRenderer->makeKnownLink(
 471                                 $this->msg( 'ipbreason-dropdown' )->inContentLanguage()->getTitle(),
 472                                 $this->msg( 'ipb-edit-dropdown' )->text(),
 473                                 [],
 474                                 [ 'action' => 'edit' ]
 475                         );
 476                 }
 477
 478                 $text = Html::rawElement(
 479                         'p',
 480                         [ 'class' => 'mw-ipb-conveniencelinks' ],
 481                         $this->getLanguage()->pipeList( $links )
 482                 );
 483
 484                 $userTitle = self::getTargetUserTitle( $this->target );
 485                 if ( $userTitle ) {
 486                         # Get relevant extracts from the block and suppression logs, if possible
 487                         $out = '';
 488
 489                         LogEventsList::showLogExtract(
 490                                 $out,
 491                                 'block',
 492                                 $userTitle,
 493                                 '',
 494                                 [
 495                                         'lim' => 10,
 496                                         'msgKey' => [ 'blocklog-showlog', $userTitle->getText() ],
 497                                         'showIfEmpty' => false
 498                                 ]
 499                         );
 500                         $text .= $out;
 501
 502                         # Add suppression block entries if allowed
 503                         if ( $user->isAllowed( 'suppressionlog' ) ) {
 504                                 LogEventsList::showLogExtract(
 505                                         $out,
 506                                         'suppress',
 507                                         $userTitle,
 508                                         '',
 509                                         [
 510                                                 'lim' => 10,
 511                                                 'conds' => [ 'log_action' => [ 'block', 'reblock', 'unblock' ] ],
 512                                                 'msgKey' => [ 'blocklog-showsuppresslog', $userTitle->getText() ],
 513                                                 'showIfEmpty' => false
 514                                         ]
 515                                 );
 516
 517                                 $text .= $out;
 518                         }
 519                 }
 520
 521                 return $text;
 522         }
 523
 524         /**
 525          * Get a user page target for things like logs.
 526          * This handles account and IP range targets.
 527          * @param User|string $target
 528          * @return Title|null
 529          */
 530         protected static function getTargetUserTitle( $target ) {
 531                 if ( $target instanceof User ) {
 532                         return $target->getUserPage();
 533                 } elseif ( IP::isIPAddress( $target ) ) {
 534                         return Title::makeTitleSafe( NS_USER, $target );
 535                 }
 536
 537                 return null;
 538         }
 539
 540         /**
 541          * Determine the target of the block, and the type of target
 542          * @todo Should be in Block.php?
 543          * @param string $par Subpage parameter passed to setup, or data value from
 544          *     the HTMLForm
 545          * @param WebRequest|null $request Optionally try and get data from a request too
 546          * @return array [ User|string|null, Block::TYPE_ constant|null ]
 547          */
 548         public static function getTargetAndType( $par, WebRequest $request = null ) {
 549                 $i = 0;
 550                 $target = null;
 551
 552                 while ( true ) {
 553                         switch ( $i++ ) {
 554                                 case 0:
 555                                         # The HTMLForm will check wpTarget first and only if it doesn't get
 556                                         # a value use the default, which will be generated from the options
 557                                         # below; so this has to have a higher precedence here than $par, or
 558                                         # we could end up with different values in $this->target and the HTMLForm!
 559                                         if ( $request instanceof WebRequest ) {
 560                                                 $target = $request->getText( 'wpTarget', null );
 561                                         }
 562                                         break;
 563                                 case 1:
 564                                         $target = $par;
 565                                         break;
 566                                 case 2:
 567                                         if ( $request instanceof WebRequest ) {
 568                                                 $target = $request->getText( 'ip', null );
 569                                         }
 570                                         break;
 571                                 case 3:
 572                                         # B/C @since 1.18
 573                                         if ( $request instanceof WebRequest ) {
 574                                                 $target = $request->getText( 'wpBlockAddress', null );
 575                                         }
 576                                         break;
 577                                 case 4:
 578                                         break 2;
 579                         }
 580
 581                         list( $target, $type ) = Block::parseTarget( $target );
 582
 583                         if ( $type !== null ) {
 584                                 return [ $target, $type ];
 585                         }
 586                 }
 587
 588                 return [ null, null ];
 589         }
 590
 591         /**
 592          * HTMLForm field validation-callback for Target field.
 593          * @since 1.18
 594          * @param string $value
 595          * @param array $alldata
 596          * @param HTMLForm $form
 597          * @return Message
 598          */
 599         public static function validateTargetField( $value, $alldata, $form ) {
 600                 $status = self::validateTarget( $value, $form->getUser() );
 601                 if ( !$status->isOK() ) {
 602                         $errors = $status->getErrorsArray();
 603
 604                         return $form->msg( ...$errors[0] );
 605                 } else {
 606                         return true;
 607                 }
 608         }
 609
 610         /**
 611          * Validate a block target.
 612          *
 613          * @since 1.21
 614          * @param string $value Block target to check
 615          * @param User $user Performer of the block
 616          * @return Status
 617          */
 618         public static function validateTarget( $value, User $user ) {
 619                 global $wgBlockCIDRLimit;
 620
 621                 /** @var User $target */
 622                 list( $target, $type ) = self::getTargetAndType( $value );
 623                 $status = Status::newGood( $target );
 624
 625                 if ( $type == Block::TYPE_USER ) {
 626                         if ( $target->isAnon() ) {
 627                                 $status->fatal(
 628                                         'nosuchusershort',
 629                                         wfEscapeWikiText( $target->getName() )
 630                                 );
 631                         }
 632
 633                         $unblockStatus = self::checkUnblockSelf( $target, $user );
 634                         if ( $unblockStatus !== true ) {
 635                                 $status->fatal( 'badaccess', $unblockStatus );
 636                         }
 637                 } elseif ( $type == Block::TYPE_RANGE ) {
 638                         list( $ip, $range ) = explode( '/', $target, 2 );
 639
 640                         if (
 641                                 ( IP::isIPv4( $ip ) && $wgBlockCIDRLimit['IPv4'] == 32 ) ||
 642                                 ( IP::isIPv6( $ip ) && $wgBlockCIDRLimit['IPv6'] == 128 )
 643                         ) {
 644                                 // Range block effectively disabled
 645                                 $status->fatal( 'range_block_disabled' );
 646                         }
 647
 648                         if (
 649                                 ( IP::isIPv4( $ip ) && $range > 32 ) ||
 650                                 ( IP::isIPv6( $ip ) && $range > 128 )
 651                         ) {
 652                                 // Dodgy range
 653                                 $status->fatal( 'ip_range_invalid' );
 654                         }
 655
 656                         if ( IP::isIPv4( $ip ) && $range < $wgBlockCIDRLimit['IPv4'] ) {
 657                                 $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv4'] );
 658                         }
 659
 660                         if ( IP::isIPv6( $ip ) && $range < $wgBlockCIDRLimit['IPv6'] ) {
 661                                 $status->fatal( 'ip_range_toolarge', $wgBlockCIDRLimit['IPv6'] );
 662                         }
 663                 } elseif ( $type == Block::TYPE_IP ) {
 664                         # All is well
 665                 } else {
 666                         $status->fatal( 'badipaddress' );
 667                 }
 668
 669                 return $status;
 670         }
 671
 672         /**
 673          * Given the form data, actually implement a block. This is also called from ApiBlock.
 674          *
 675          * @param array $data
 676          * @param IContextSource $context
 677          * @return bool|string
 678          */
 679         public static function processForm( array $data, IContextSource $context ) {
 680                 global $wgBlockAllowsUTEdit, $wgHideUserContribLimit;
 681
 682                 $performer = $context->getUser();
 683                 $enablePartialBlocks = $context->getConfig()->get( 'EnablePartialBlocks' );
 684
 685                 // Handled by field validator callback
 686                 // self::validateTargetField( $data['Target'] );
 687
 688                 # This might have been a hidden field or a checkbox, so interesting data
 689                 # can come from it
 690                 $data['Confirm'] = !in_array( $data['Confirm'], [ '', '0', null, false ], true );
 691
 692                 /** @var User $target */
 693                 list( $target, $type ) = self::getTargetAndType( $data['Target'] );
 694                 if ( $type == Block::TYPE_USER ) {
 695                         $user = $target;
 696                         $target = $user->getName();
 697                         $userId = $user->getId();
 698
 699                         # Give admins a heads-up before they go and block themselves.  Much messier
 700                         # to do this for IPs, but it's pretty unlikely they'd ever get the 'block'
 701                         # permission anyway, although the code does allow for it.
 702                         # Note: Important to use $target instead of $data['Target']
 703                         # since both $data['PreviousTarget'] and $target are normalized
 704                         # but $data['target'] gets overridden by (non-normalized) request variable
 705                         # from previous request.
 706                         if ( $target === $performer->getName() &&
 707                                 ( $data['PreviousTarget'] !== $target || !$data['Confirm'] )
 708                         ) {
 709                                 return [ 'ipb-blockingself', 'ipb-confirmaction' ];
 710                         }
 711                 } elseif ( $type == Block::TYPE_RANGE ) {
 712                         $user = null;
 713                         $userId = 0;
 714                 } elseif ( $type == Block::TYPE_IP ) {
 715                         $user = null;
 716                         $target = $target->getName();
 717                         $userId = 0;
 718                 } else {
 719                         # This should have been caught in the form field validation
 720                         return [ 'badipaddress' ];
 721                 }
 722
 723                 $expiryTime = self::parseExpiryInput( $data['Expiry'] );
 724
 725                 if (
 726                         // an expiry time is needed
 727                         ( strlen( $data['Expiry'] ) == 0 ) ||
 728                         // can't be a larger string as 50 (it should be a time format in any way)
 729                         ( strlen( $data['Expiry'] ) > 50 ) ||
 730                         // check, if the time could be parsed
 731                         !$expiryTime
 732                 ) {
 733                         return [ 'ipb_expiry_invalid' ];
 734                 }
 735
 736                 // an expiry time should be in the future, not in the
 737                 // past (wouldn't make any sense) - bug T123069
 738                 if ( $expiryTime < wfTimestampNow() ) {
 739                         return [ 'ipb_expiry_old' ];
 740                 }
 741
 742                 if ( !isset( $data['DisableEmail'] ) ) {
 743                         $data['DisableEmail'] = false;
 744                 }
 745
 746                 # If the user has done the form 'properly', they won't even have been given the
 747                 # option to suppress-block unless they have the 'hideuser' permission
 748                 if ( !isset( $data['HideUser'] ) ) {
 749                         $data['HideUser'] = false;
 750                 }
 751
 752                 if ( $data['HideUser'] ) {
 753                         if ( !$performer->isAllowed( 'hideuser' ) ) {
 754                                 # this codepath is unreachable except by a malicious user spoofing forms,
 755                                 # or by race conditions (user has hideuser and block rights, loads block form,
 756                                 # and loses hideuser rights before submission); so need to fail completely
 757                                 # rather than just silently disable hiding
 758                                 return [ 'badaccess-group0' ];
 759                         }
 760
 761                         # Recheck params here...
 762                         if ( $type != Block::TYPE_USER ) {
 763                                 $data['HideUser'] = false; # IP users should not be hidden
 764                         } elseif ( !wfIsInfinity( $data['Expiry'] ) ) {
 765                                 # Bad expiry.
 766                                 return [ 'ipb_expiry_temp' ];
 767                         } elseif ( $wgHideUserContribLimit !== false
 768                                 && $user->getEditCount() > $wgHideUserContribLimit
 769                         ) {
 770                                 # Typically, the user should have a handful of edits.
 771                                 # Disallow hiding users with many edits for performance.
 772                                 return [ [ 'ipb_hide_invalid',
 773                                         Message::numParam( $wgHideUserContribLimit ) ] ];
 774                         } elseif ( !$data['Confirm'] ) {
 775                                 return [ 'ipb-confirmhideuser', 'ipb-confirmaction' ];
 776                         }
 777                 }
 778
 779                 # Create block object.
 780                 $block = new Block();
 781                 $block->setTarget( $target );
 782                 $block->setBlocker( $performer );
 783                 $block->mReason = $data['Reason'][0];
 784                 $block->mExpiry = $expiryTime;
 785                 $block->prevents( 'createaccount', $data['CreateAccount'] );
 786                 $block->prevents( 'editownusertalk', ( !$wgBlockAllowsUTEdit || $data['DisableUTEdit'] ) );
 787                 $block->prevents( 'sendemail', $data['DisableEmail'] );
 788                 $block->isHardblock( $data['HardBlock'] );
 789                 $block->isAutoblocking( $data['AutoBlock'] );
 790                 $block->mHideName = $data['HideUser'];
 791
 792                 if (
 793                         $enablePartialBlocks &&
 794                         isset( $data['EditingRestriction'] ) &&
 795                         $data['EditingRestriction'] === 'partial'
 796                  ) {
 797                          $block->isSitewide( false );
 798                 }
 799
 800                 $reason = [ 'hookaborted' ];
 801                 if ( !Hooks::run( 'BlockIp', [ &$block, &$performer, &$reason ] ) ) {
 802                         return $reason;
 803                 }
 804
 805                 $restrictions = [];
 806                 if ( $enablePartialBlocks ) {
 807                         if ( !empty( $data['PageRestrictions'] ) ) {
 808                                 $restrictions = array_map( function ( $text ) {
 809                                         $title = Title::newFromText( $text );
 810                                         // Use the link cache since the title has already been loaded when
 811                                         // the field was validated.
 812                                         $restriction = new PageRestriction( 0, $title->getArticleId() );
 813                                         $restriction->setTitle( $title );
 814                                         return $restriction;
 815                                 }, explode( "\n", $data['PageRestrictions'] ) );
 816                         }
 817
 818                         $block->setRestrictions( $restrictions );
 819                 }
 820
 821                 $priorBlock = null;
 822                 # Try to insert block. Is there a conflicting block?
 823                 $status = $block->insert();
 824                 if ( !$status ) {
 825                         # Indicates whether the user is confirming the block and is aware of
 826                         # the conflict (did not change the block target in the meantime)
 827                         $blockNotConfirmed = !$data['Confirm'] || ( array_key_exists( 'PreviousTarget', $data )
 828                                 && $data['PreviousTarget'] !== $target );
 829
 830                         # Special case for API - T34434
 831                         $reblockNotAllowed = ( array_key_exists( 'Reblock', $data ) && !$data['Reblock'] );
 832
 833                         # Show form unless the user is already aware of this...
 834                         if ( $blockNotConfirmed || $reblockNotAllowed ) {
 835                                 return [ [ 'ipb_already_blocked', $block->getTarget() ] ];
 836                                 # Otherwise, try to update the block...
 837                         } else {
 838                                 # This returns direct blocks before autoblocks/rangeblocks, since we should
 839                                 # be sure the user is blocked by now it should work for our purposes
 840                                 $currentBlock = Block::newFromTarget( $target );
 841                                 if ( $block->equals( $currentBlock ) ) {
 842                                         return [ [ 'ipb_already_blocked', $block->getTarget() ] ];
 843                                 }
 844                                 # If the name was hidden and the blocking user cannot hide
 845                                 # names, then don't allow any block changes...
 846                                 if ( $currentBlock->mHideName && !$performer->isAllowed( 'hideuser' ) ) {
 847                                         return [ 'cant-see-hidden-user' ];
 848                                 }
 849
 850                                 $priorBlock = clone $currentBlock;
 851                                 $currentBlock->isHardblock( $block->isHardblock() );
 852                                 $currentBlock->prevents( 'createaccount', $block->prevents( 'createaccount' ) );
 853                                 $currentBlock->mExpiry = $block->mExpiry;
 854                                 $currentBlock->isAutoblocking( $block->isAutoblocking() );
 855                                 $currentBlock->mHideName = $block->mHideName;
 856                                 $currentBlock->prevents( 'sendemail', $block->prevents( 'sendemail' ) );
 857                                 $currentBlock->prevents( 'editownusertalk', $block->prevents( 'editownusertalk' ) );
 858                                 $currentBlock->mReason = $block->mReason;
 859
 860                                 if ( $enablePartialBlocks ) {
 861                                         // Maintain the sitewide status. If partial blocks is not enabled,
 862                                         // saving the block will result in a sitewide block.
 863                                         $currentBlock->isSitewide( $block->isSitewide() );
 864
 865                                         // Set the block id of the restrictions.
 866                                         $currentBlock->setRestrictions(
 867                                                 BlockRestriction::setBlockId( $currentBlock->getId(), $restrictions )
 868                                         );
 869                                 }
 870
 871                                 $status = $currentBlock->update();
 872
 873                                 $logaction = 'reblock';
 874
 875                                 # Unset _deleted fields if requested
 876                                 if ( $currentBlock->mHideName && !$data['HideUser'] ) {
 877                                         RevisionDeleteUser::unsuppressUserName( $target, $userId );
 878                                 }
 879
 880                                 # If hiding/unhiding a name, this should go in the private logs
 881                                 if ( (bool)$currentBlock->mHideName ) {
 882                                         $data['HideUser'] = true;
 883                                 }
 884                         }
 885                 } else {
 886                         $logaction = 'block';
 887                 }
 888
 889                 Hooks::run( 'BlockIpComplete', [ $block, $performer, $priorBlock ] );
 890
 891                 # Set *_deleted fields if requested
 892                 if ( $data['HideUser'] ) {
 893                         RevisionDeleteUser::suppressUserName( $target, $userId );
 894                 }
 895
 896                 # Can't watch a rangeblock
 897                 if ( $type != Block::TYPE_RANGE && $data['Watch'] ) {
 898                         WatchAction::doWatch(
 899                                 Title::makeTitle( NS_USER, $target ),
 900                                 $performer,
 901                                 User::IGNORE_USER_RIGHTS
 902                         );
 903                 }
 904
 905                 # Block constructor sanitizes certain block options on insert
 906                 $data['BlockEmail'] = $block->prevents( 'sendemail' );
 907                 $data['AutoBlock'] = $block->isAutoblocking();
 908
 909                 # Prepare log parameters
 910                 $logParams = [];
 911                 $logParams['5::duration'] = $data['Expiry'];
 912                 $logParams['6::flags'] = self::blockLogFlags( $data, $type );
 913
 914                 # Make log entry, if the name is hidden, put it in the suppression log
 915                 $log_type = $data['HideUser'] ? 'suppress' : 'block';
 916                 $logEntry = new ManualLogEntry( $log_type, $logaction );
 917                 $logEntry->setTarget( Title::makeTitle( NS_USER, $target ) );
 918                 $logEntry->setComment( $data['Reason'][0] );
 919                 $logEntry->setPerformer( $performer );
 920                 $logEntry->setParameters( $logParams );
 921                 # Relate log ID to block IDs (T27763)
 922                 $blockIds = array_merge( [ $status['id'] ], $status['autoIds'] );
 923                 $logEntry->setRelations( [ 'ipb_id' => $blockIds ] );
 924                 $logId = $logEntry->insert();
 925
 926                 if ( !empty( $data['Tags'] ) ) {
 927                         $logEntry->setTags( $data['Tags'] );
 928                 }
 929
 930                 $logEntry->publish( $logId );
 931
 932                 return true;
 933         }
 934
 935         /**
 936          * Get an array of suggested block durations from MediaWiki:Ipboptions
 937          * @todo FIXME: This uses a rather odd syntax for the options, should it be converted
 938          *     to the standard "**<duration>|<displayname>" format?
 939          * @param Language|null $lang The language to get the durations in, or null to use
 940          *     the wiki's content language
 941          * @param bool $includeOther Whether to include the 'other' option in the list of
 942          *     suggestions
 943          * @return array
 944          */
 945         public static function getSuggestedDurations( Language $lang = null, $includeOther = true ) {
 946                 $a = [];
 947                 $msg = $lang === null
 948                         ? wfMessage( 'ipboptions' )->inContentLanguage()->text()
 949                         : wfMessage( 'ipboptions' )->inLanguage( $lang )->text();
 950
 951                 if ( $msg == '-' ) {
 952                         return [];
 953                 }
 954
 955                 foreach ( explode( ',', $msg ) as $option ) {
 956                         if ( strpos( $option, ':' ) === false ) {
 957                                 $option = "$option:$option";
 958                         }
 959
 960                         list( $show, $value ) = explode( ':', $option );
 961                         $a[$show] = $value;
 962                 }
 963
 964                 if ( $a && $includeOther ) {
 965                         // if options exist, add other to the end instead of the begining (which
 966                         // is what happens by default).
 967                         $a[ wfMessage( 'ipbother' )->text() ] = 'other';
 968                 }
 969
 970                 return $a;
 971         }
 972
 973         /**
 974          * Convert a submitted expiry time, which may be relative ("2 weeks", etc) or absolute
 975          * ("24 May 2034", etc), into an absolute timestamp we can put into the database.
 976          *
 977          * @todo strtotime() only accepts English strings. This means the expiry input
 978          *       can only be specified in English.
 979          * @see https://secure.php.net/manual/en/function.strtotime.php
 980          *
 981          * @param string $expiry Whatever was typed into the form
 982          * @return string|bool Timestamp or 'infinity' or false on error.
 983          */
 984         public static function parseExpiryInput( $expiry ) {
 985                 if ( wfIsInfinity( $expiry ) ) {
 986                         return 'infinity';
 987                 }
 988
 989                 $expiry = strtotime( $expiry );
 990
 991                 if ( $expiry < 0 || $expiry === false ) {
 992                         return false;
 993                 }
 994
 995                 return wfTimestamp( TS_MW, $expiry );
 996         }
 997
 998         /**
 999          * Can we do an email block?
1000          * @param User $user The sysop wanting to make a block
1001          * @return bool
1002          */
1003         public static function canBlockEmail( $user ) {
1004                 global $wgEnableUserEmail, $wgSysopEmailBans;
1005
1006                 return ( $wgEnableUserEmail && $wgSysopEmailBans && $user->isAllowed( 'blockemail' ) );
1007         }
1008
1009         /**
1010          * T17810: blocked admins should not be able to block/unblock
1011          * others, and probably shouldn't be able to unblock themselves
1012          * either.
1013          * @param User|int|string $user
1014          * @param User $performer User doing the request
1015          * @return bool|string True or error message key
1016          */
1017         public static function checkUnblockSelf( $user, User $performer ) {
1018                 if ( is_int( $user ) ) {
1019                         $user = User::newFromId( $user );
1020                 } elseif ( is_string( $user ) ) {
1021                         $user = User::newFromName( $user );
1022                 }
1023
1024                 if ( $performer->isBlocked() ) {
1025                         if ( $user instanceof User && $user->getId() == $performer->getId() ) {
1026                                 # User is trying to unblock themselves
1027                                 if ( $performer->isAllowed( 'unblockself' ) ) {
1028                                         return true;
1029                                         # User blocked themselves and is now trying to reverse it
1030                                 } elseif ( $performer->blockedBy() === $performer->getName() ) {
1031                                         return true;
1032                                 } else {
1033                                         return 'ipbnounblockself';
1034                                 }
1035                         } else {
1036                                 # User is trying to block/unblock someone else
1037                                 return 'ipbblocked';
1038                         }
1039                 } else {
1040                         return true;
1041                 }
1042         }
1043
1044         /**
1045          * Return a comma-delimited list of "flags" to be passed to the log
1046          * reader for this block, to provide more information in the logs
1047          * @param array $data From HTMLForm data
1048          * @param int $type Block::TYPE_ constant (USER, RANGE, or IP)
1049          * @return string
1050          */
1051         protected static function blockLogFlags( array $data, $type ) {
1052                 global $wgBlockAllowsUTEdit;
1053                 $flags = [];
1054
1055                 # when blocking a user the option 'anononly' is not available/has no effect
1056                 # -> do not write this into log
1057                 if ( !$data['HardBlock'] && $type != Block::TYPE_USER ) {
1058                         // For grepping: message block-log-flags-anononly
1059                         $flags[] = 'anononly';
1060                 }
1061
1062                 if ( $data['CreateAccount'] ) {
1063                         // For grepping: message block-log-flags-nocreate
1064                         $flags[] = 'nocreate';
1065                 }
1066
1067                 # Same as anononly, this is not displayed when blocking an IP address
1068                 if ( !$data['AutoBlock'] && $type == Block::TYPE_USER ) {
1069                         // For grepping: message block-log-flags-noautoblock
1070                         $flags[] = 'noautoblock';
1071                 }
1072
1073                 if ( $data['DisableEmail'] ) {
1074                         // For grepping: message block-log-flags-noemail
1075                         $flags[] = 'noemail';
1076                 }
1077
1078                 if ( $wgBlockAllowsUTEdit && $data['DisableUTEdit'] ) {
1079                         // For grepping: message block-log-flags-nousertalk
1080                         $flags[] = 'nousertalk';
1081                 }
1082
1083                 if ( $data['HideUser'] ) {
1084                         // For grepping: message block-log-flags-hiddenname
1085                         $flags[] = 'hiddenname';
1086                 }
1087
1088                 return implode( ',', $flags );
1089         }
1090
1091         /**
1092          * Process the form on POST submission.
1093          * @param array $data
1094          * @param HTMLForm|null $form
1095          * @return bool|array True for success, false for didn't-try, array of errors on failure
1096          */
1097         public function onSubmit( array $data, HTMLForm $form = null ) {
1098                 return self::processForm( $data, $form->getContext() );
1099         }
1100
1101         /**
1102          * Do something exciting on successful processing of the form, most likely to show a
1103          * confirmation message
1104          */
1105         public function onSuccess() {
1106                 $out = $this->getOutput();
1107                 $out->setPageTitle( $this->msg( 'blockipsuccesssub' ) );
1108                 $out->addWikiMsg( 'blockipsuccesstext', wfEscapeWikiText( $this->target ) );
1109         }
1110
1111         /**
1112          * Return an array of subpages beginning with $search that this special page will accept.
1113          *
1114          * @param string $search Prefix to search for
1115          * @param int $limit Maximum number of results to return (usually 10)
1116          * @param int $offset Number of results to skip (usually 0)
1117          * @return string[] Matching subpages
1118          */
1119         public function prefixSearchSubpages( $search, $limit, $offset ) {
1120                 $user = User::newFromName( $search );
1121                 if ( !$user ) {
1122                         // No prefix suggestion for invalid user
1123                         return [];
1124                 }
1125                 // Autocomplete subpage as user list - public to allow caching
1126                 return UserNamePrefixSearch::search( 'public', $search, $limit, $offset );
1127         }
1128
1129         protected function getGroupName() {
1130                 return 'users';
1131         }
1132 }