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