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