includes/Block.php

   1 <?php
   2 /**
   3  * Blocks and bans object
   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  */
  22 class Block {
  23         /** @var string */
  24         public $mReason;
  25
  26         /** @var bool|string */
  27         public $mTimestamp;
  28
  29         /** @var int */
  30         public $mAuto;
  31
  32         /** @var bool|string */
  33         public $mExpiry;
  34
  35         public $mHideName;
  36
  37         /** @var int */
  38         public $mParentBlockId;
  39
  40         /** @var int */
  41         protected $mId;
  42
  43         /** @var bool */
  44         protected $mFromMaster;
  45
  46         /** @var bool */
  47         protected $mBlockEmail;
  48
  49         /** @var bool */
  50         protected $mDisableUsertalk;
  51
  52         /** @var bool */
  53         protected $mCreateAccount;
  54
  55         /** @var User|string */
  56         protected $target;
  57
  58         /** @var int Hack for foreign blocking (CentralAuth) */
  59         protected $forcedTargetID;
  60
  61         /** @var int Block::TYPE_ constant. Can only be USER, IP or RANGE internally */
  62         protected $type;
  63
  64         /** @var User */
  65         protected $blocker;
  66
  67         /** @var bool */
  68         protected $isHardblock = true;
  69
  70         /** @var bool */
  71         protected $isAutoblocking = true;
  72
  73         # TYPE constants
  74         const TYPE_USER = 1;
  75         const TYPE_IP = 2;
  76         const TYPE_RANGE = 3;
  77         const TYPE_AUTO = 4;
  78         const TYPE_ID = 5;
  79
  80         /**
  81          * @todo FIXME: Don't know what the best format to have for this constructor
  82          *   is, but fourteen optional parameters certainly isn't it.
  83          * @param string $address
  84          * @param int $user
  85          * @param int $by
  86          * @param string $reason
  87          * @param mixed $timestamp
  88          * @param int $auto
  89          * @param string $expiry
  90          * @param int $anonOnly
  91          * @param int $createAccount
  92          * @param int $enableAutoblock
  93          * @param int $hideName
  94          * @param int $blockEmail
  95          * @param int $allowUsertalk
  96          * @param string $byText
  97          */
  98         function __construct( $address = '', $user = 0, $by = 0, $reason = '',
  99                 $timestamp = 0, $auto = 0, $expiry = '', $anonOnly = 0, $createAccount = 0, $enableAutoblock = 0,
 100                 $hideName = 0, $blockEmail = 0, $allowUsertalk = 0, $byText = ''
 101         ) {
 102                 if ( $timestamp === 0 ) {
 103                         $timestamp = wfTimestampNow();
 104                 }
 105
 106                 if ( count( func_get_args() ) > 0 ) {
 107                         # Soon... :D
 108                         # wfDeprecated( __METHOD__ . " with arguments" );
 109                 }
 110
 111                 $this->setTarget( $address );
 112                 if ( $this->target instanceof User && $user ) {
 113                         $this->forcedTargetID = $user; // needed for foreign users
 114                 }
 115                 if ( $by ) { // local user
 116                         $this->setBlocker( User::newFromId( $by ) );
 117                 } else { // foreign user
 118                         $this->setBlocker( $byText );
 119                 }
 120                 $this->mReason = $reason;
 121                 $this->mTimestamp = wfTimestamp( TS_MW, $timestamp );
 122                 $this->mAuto = $auto;
 123                 $this->isHardblock( !$anonOnly );
 124                 $this->prevents( 'createaccount', $createAccount );
 125                 $this->mExpiry = wfGetDB( DB_SLAVE )->decodeExpiry( $expiry );
 126                 $this->isAutoblocking( $enableAutoblock );
 127                 $this->mHideName = $hideName;
 128                 $this->prevents( 'sendemail', $blockEmail );
 129                 $this->prevents( 'editownusertalk', !$allowUsertalk );
 130
 131                 $this->mFromMaster = false;
 132         }
 133
 134         /**
 135          * Load a blocked user from their block id.
 136          *
 137          * @param int $id Block id to search for
 138          * @return Block|null
 139          */
 140         public static function newFromID( $id ) {
 141                 $dbr = wfGetDB( DB_SLAVE );
 142                 $res = $dbr->selectRow(
 143                         'ipblocks',
 144                         self::selectFields(),
 145                         array( 'ipb_id' => $id ),
 146                         __METHOD__
 147                 );
 148                 if ( $res ) {
 149                         return self::newFromRow( $res );
 150                 } else {
 151                         return null;
 152                 }
 153         }
 154
 155         /**
 156          * Return the list of ipblocks fields that should be selected to create
 157          * a new block.
 158          * @return array
 159          */
 160         public static function selectFields() {
 161                 return array(
 162                         'ipb_id',
 163                         'ipb_address',
 164                         'ipb_by',
 165                         'ipb_by_text',
 166                         'ipb_reason',
 167                         'ipb_timestamp',
 168                         'ipb_auto',
 169                         'ipb_anon_only',
 170                         'ipb_create_account',
 171                         'ipb_enable_autoblock',
 172                         'ipb_expiry',
 173                         'ipb_deleted',
 174                         'ipb_block_email',
 175                         'ipb_allow_usertalk',
 176                         'ipb_parent_block_id',
 177                 );
 178         }
 179
 180         /**
 181          * Check if two blocks are effectively equal.  Doesn't check irrelevant things like
 182          * the blocking user or the block timestamp, only things which affect the blocked user
 183          *
 184          * @param Block $block
 185          *
 186          * @return bool
 187          */
 188         public function equals( Block $block ) {
 189                 return (
 190                         (string)$this->target == (string)$block->target
 191                         && $this->type == $block->type
 192                         && $this->mAuto == $block->mAuto
 193                         && $this->isHardblock() == $block->isHardblock()
 194                         && $this->prevents( 'createaccount' ) == $block->prevents( 'createaccount' )
 195                         && $this->mExpiry == $block->mExpiry
 196                         && $this->isAutoblocking() == $block->isAutoblocking()
 197                         && $this->mHideName == $block->mHideName
 198                         && $this->prevents( 'sendemail' ) == $block->prevents( 'sendemail' )
 199                         && $this->prevents( 'editownusertalk' ) == $block->prevents( 'editownusertalk' )
 200                         && $this->mReason == $block->mReason
 201                 );
 202         }
 203
 204         /**
 205          * Load a block from the database which affects the already-set $this->target:
 206          *     1) A block directly on the given user or IP
 207          *     2) A rangeblock encompassing the given IP (smallest first)
 208          *     3) An autoblock on the given IP
 209          * @param User|string $vagueTarget Also search for blocks affecting this target.  Doesn't
 210          *     make any sense to use TYPE_AUTO / TYPE_ID here. Leave blank to skip IP lookups.
 211          * @throws MWException
 212          * @return bool Whether a relevant block was found
 213          */
 214         protected function newLoad( $vagueTarget = null ) {
 215                 $db = wfGetDB( $this->mFromMaster ? DB_MASTER : DB_SLAVE );
 216
 217                 if ( $this->type !== null ) {
 218                         $conds = array(
 219                                 'ipb_address' => array( (string)$this->target ),
 220                         );
 221                 } else {
 222                         $conds = array( 'ipb_address' => array() );
 223                 }
 224
 225                 # Be aware that the != '' check is explicit, since empty values will be
 226                 # passed by some callers (bug 29116)
 227                 if ( $vagueTarget != '' ) {
 228                         list( $target, $type ) = self::parseTarget( $vagueTarget );
 229                         switch ( $type ) {
 230                                 case self::TYPE_USER:
 231                                         # Slightly weird, but who are we to argue?
 232                                         $conds['ipb_address'][] = (string)$target;
 233                                         break;
 234
 235                                 case self::TYPE_IP:
 236                                         $conds['ipb_address'][] = (string)$target;
 237                                         $conds[] = self::getRangeCond( IP::toHex( $target ) );
 238                                         $conds = $db->makeList( $conds, LIST_OR );
 239                                         break;
 240
 241                                 case self::TYPE_RANGE:
 242                                         list( $start, $end ) = IP::parseRange( $target );
 243                                         $conds['ipb_address'][] = (string)$target;
 244                                         $conds[] = self::getRangeCond( $start, $end );
 245                                         $conds = $db->makeList( $conds, LIST_OR );
 246                                         break;
 247
 248                                 default:
 249                                         throw new MWException( "Tried to load block with invalid type" );
 250                         }
 251                 }
 252
 253                 $res = $db->select( 'ipblocks', self::selectFields(), $conds, __METHOD__ );
 254
 255                 # This result could contain a block on the user, a block on the IP, and a russian-doll
 256                 # set of rangeblocks.  We want to choose the most specific one, so keep a leader board.
 257                 $bestRow = null;
 258
 259                 # Lower will be better
 260                 $bestBlockScore = 100;
 261
 262                 # This is begging for $this = $bestBlock, but that's not allowed in PHP :(
 263                 $bestBlockPreventsEdit = null;
 264
 265                 foreach ( $res as $row ) {
 266                         $block = self::newFromRow( $row );
 267
 268                         # Don't use expired blocks
 269                         if ( $block->deleteIfExpired() ) {
 270                                 continue;
 271                         }
 272
 273                         # Don't use anon only blocks on users
 274                         if ( $this->type == self::TYPE_USER && !$block->isHardblock() ) {
 275                                 continue;
 276                         }
 277
 278                         if ( $block->getType() == self::TYPE_RANGE ) {
 279                                 # This is the number of bits that are allowed to vary in the block, give
 280                                 # or take some floating point errors
 281                                 $end = wfBaseconvert( $block->getRangeEnd(), 16, 10 );
 282                                 $start = wfBaseconvert( $block->getRangeStart(), 16, 10 );
 283                                 $size = log( $end - $start + 1, 2 );
 284
 285                                 # This has the nice property that a /32 block is ranked equally with a
 286                                 # single-IP block, which is exactly what it is...
 287                                 $score = self::TYPE_RANGE - 1 + ( $size / 128 );
 288
 289                         } else {
 290                                 $score = $block->getType();
 291                         }
 292
 293                         if ( $score < $bestBlockScore ) {
 294                                 $bestBlockScore = $score;
 295                                 $bestRow = $row;
 296                                 $bestBlockPreventsEdit = $block->prevents( 'edit' );
 297                         }
 298                 }
 299
 300                 if ( $bestRow !== null ) {
 301                         $this->initFromRow( $bestRow );
 302                         $this->prevents( 'edit', $bestBlockPreventsEdit );
 303                         return true;
 304                 } else {
 305                         return false;
 306                 }
 307         }
 308
 309         /**
 310          * Get a set of SQL conditions which will select rangeblocks encompassing a given range
 311          * @param string $start Hexadecimal IP representation
 312          * @param string $end Hexadecimal IP representation, or null to use $start = $end
 313          * @return string
 314          */
 315         public static function getRangeCond( $start, $end = null ) {
 316                 if ( $end === null ) {
 317                         $end = $start;
 318                 }
 319                 # Per bug 14634, we want to include relevant active rangeblocks; for
 320                 # rangeblocks, we want to include larger ranges which enclose the given
 321                 # range. We know that all blocks must be smaller than $wgBlockCIDRLimit,
 322                 # so we can improve performance by filtering on a LIKE clause
 323                 $chunk = self::getIpFragment( $start );
 324                 $dbr = wfGetDB( DB_SLAVE );
 325                 $like = $dbr->buildLike( $chunk, $dbr->anyString() );
 326
 327                 # Fairly hard to make a malicious SQL statement out of hex characters,
 328                 # but stranger things have happened...
 329                 $safeStart = $dbr->addQuotes( $start );
 330                 $safeEnd = $dbr->addQuotes( $end );
 331
 332                 return $dbr->makeList(
 333                         array(
 334                                 "ipb_range_start $like",
 335                                 "ipb_range_start <= $safeStart",
 336                                 "ipb_range_end >= $safeEnd",
 337                         ),
 338                         LIST_AND
 339                 );
 340         }
 341
 342         /**
 343          * Get the component of an IP address which is certain to be the same between an IP
 344          * address and a rangeblock containing that IP address.
 345          * @param string $hex Hexadecimal IP representation
 346          * @return string
 347          */
 348         protected static function getIpFragment( $hex ) {
 349                 global $wgBlockCIDRLimit;
 350                 if ( substr( $hex, 0, 3 ) == 'v6-' ) {
 351                         return 'v6-' . substr( substr( $hex, 3 ), 0, floor( $wgBlockCIDRLimit['IPv6'] / 4 ) );
 352                 } else {
 353                         return substr( $hex, 0, floor( $wgBlockCIDRLimit['IPv4'] / 4 ) );
 354                 }
 355         }
 356
 357         /**
 358          * Given a database row from the ipblocks table, initialize
 359          * member variables
 360          * @param stdClass $row A row from the ipblocks table
 361          */
 362         protected function initFromRow( $row ) {
 363                 $this->setTarget( $row->ipb_address );
 364                 if ( $row->ipb_by ) { // local user
 365                         $this->setBlocker( User::newFromId( $row->ipb_by ) );
 366                 } else { // foreign user
 367                         $this->setBlocker( $row->ipb_by_text );
 368                 }
 369
 370                 $this->mReason = $row->ipb_reason;
 371                 $this->mTimestamp = wfTimestamp( TS_MW, $row->ipb_timestamp );
 372                 $this->mAuto = $row->ipb_auto;
 373                 $this->mHideName = $row->ipb_deleted;
 374                 $this->mId = $row->ipb_id;
 375                 $this->mParentBlockId = $row->ipb_parent_block_id;
 376
 377                 // I wish I didn't have to do this
 378                 $this->mExpiry = wfGetDB( DB_SLAVE )->decodeExpiry( $row->ipb_expiry );
 379
 380                 $this->isHardblock( !$row->ipb_anon_only );
 381                 $this->isAutoblocking( $row->ipb_enable_autoblock );
 382
 383                 $this->prevents( 'createaccount', $row->ipb_create_account );
 384                 $this->prevents( 'sendemail', $row->ipb_block_email );
 385                 $this->prevents( 'editownusertalk', !$row->ipb_allow_usertalk );
 386         }
 387
 388         /**
 389          * Create a new Block object from a database row
 390          * @param stdClass $row Row from the ipblocks table
 391          * @return Block
 392          */
 393         public static function newFromRow( $row ) {
 394                 $block = new Block;
 395                 $block->initFromRow( $row );
 396                 return $block;
 397         }
 398
 399         /**
 400          * Delete the row from the IP blocks table.
 401          *
 402          * @throws MWException
 403          * @return bool
 404          */
 405         public function delete() {
 406                 if ( wfReadOnly() ) {
 407                         return false;
 408                 }
 409
 410                 if ( !$this->getId() ) {
 411                         throw new MWException( "Block::delete() requires that the mId member be filled\n" );
 412                 }
 413
 414                 $dbw = wfGetDB( DB_MASTER );
 415                 $dbw->delete( 'ipblocks', array( 'ipb_parent_block_id' => $this->getId() ), __METHOD__ );
 416                 $dbw->delete( 'ipblocks', array( 'ipb_id' => $this->getId() ), __METHOD__ );
 417
 418                 return $dbw->affectedRows() > 0;
 419         }
 420
 421         /**
 422          * Insert a block into the block table. Will fail if there is a conflicting
 423          * block (same name and options) already in the database.
 424          *
 425          * @param DatabaseBase $dbw If you have one available
 426          * @return bool|array False on failure, assoc array on success:
 427          *      ('id' => block ID, 'autoIds' => array of autoblock IDs)
 428          */
 429         public function insert( $dbw = null ) {
 430                 wfDebug( "Block::insert; timestamp {$this->mTimestamp}\n" );
 431
 432                 if ( $dbw === null ) {
 433                         $dbw = wfGetDB( DB_MASTER );
 434                 }
 435
 436                 # Don't collide with expired blocks
 437                 Block::purgeExpired();
 438
 439                 $row = $this->getDatabaseArray();
 440                 $row['ipb_id'] = $dbw->nextSequenceValue( "ipblocks_ipb_id_seq" );
 441
 442                 $dbw->insert(
 443                         'ipblocks',
 444                         $row,
 445                         __METHOD__,
 446                         array( 'IGNORE' )
 447                 );
 448                 $affected = $dbw->affectedRows();
 449                 $this->mId = $dbw->insertId();
 450
 451                 if ( $affected ) {
 452                         $auto_ipd_ids = $this->doRetroactiveAutoblock();
 453                         return array( 'id' => $this->mId, 'autoIds' => $auto_ipd_ids );
 454                 }
 455
 456                 return false;
 457         }
 458
 459         /**
 460          * Update a block in the DB with new parameters.
 461          * The ID field needs to be loaded first.
 462          *
 463          * @return bool|array False on failure, array on success:
 464          *   ('id' => block ID, 'autoIds' => array of autoblock IDs)
 465          */
 466         public function update() {
 467                 wfDebug( "Block::update; timestamp {$this->mTimestamp}\n" );
 468                 $dbw = wfGetDB( DB_MASTER );
 469
 470                 $dbw->startAtomic( __METHOD__ );
 471
 472                 $dbw->update(
 473                         'ipblocks',
 474                         $this->getDatabaseArray( $dbw ),
 475                         array( 'ipb_id' => $this->getId() ),
 476                         __METHOD__
 477                 );
 478
 479                 $affected = $dbw->affectedRows();
 480
 481                 if ( $this->isAutoblocking() ) {
 482                         // update corresponding autoblock(s) (bug 48813)
 483                         $dbw->update(
 484                                 'ipblocks',
 485                                 $this->getAutoblockUpdateArray(),
 486                                 array( 'ipb_parent_block_id' => $this->getId() ),
 487                                 __METHOD__
 488                         );
 489                 } else {
 490                         // autoblock no longer required, delete corresponding autoblock(s)
 491                         $dbw->delete(
 492                                 'ipblocks',
 493                                 array( 'ipb_parent_block_id' => $this->getId() ),
 494                                 __METHOD__
 495                         );
 496                 }
 497
 498                 $dbw->endAtomic( __METHOD__ );
 499
 500                 if ( $affected ) {
 501                         $auto_ipd_ids = $this->doRetroactiveAutoblock();
 502                         return array( 'id' => $this->mId, 'autoIds' => $auto_ipd_ids );
 503                 }
 504
 505                 return false;
 506         }
 507
 508         /**
 509          * Get an array suitable for passing to $dbw->insert() or $dbw->update()
 510          * @param DatabaseBase $db
 511          * @return array
 512          */
 513         protected function getDatabaseArray( $db = null ) {
 514                 if ( !$db ) {
 515                         $db = wfGetDB( DB_SLAVE );
 516                 }
 517                 $expiry = $db->encodeExpiry( $this->mExpiry );
 518
 519                 if ( $this->forcedTargetID ) {
 520                         $uid = $this->forcedTargetID;
 521                 } else {
 522                         $uid = $this->target instanceof User ? $this->target->getID() : 0;
 523                 }
 524
 525                 $a = array(
 526                         'ipb_address'          => (string)$this->target,
 527                         'ipb_user'             => $uid,
 528                         'ipb_by'               => $this->getBy(),
 529                         'ipb_by_text'          => $this->getByName(),
 530                         'ipb_reason'           => $this->mReason,
 531                         'ipb_timestamp'        => $db->timestamp( $this->mTimestamp ),
 532                         'ipb_auto'             => $this->mAuto,
 533                         'ipb_anon_only'        => !$this->isHardblock(),
 534                         'ipb_create_account'   => $this->prevents( 'createaccount' ),
 535                         'ipb_enable_autoblock' => $this->isAutoblocking(),
 536                         'ipb_expiry'           => $expiry,
 537                         'ipb_range_start'      => $this->getRangeStart(),
 538                         'ipb_range_end'        => $this->getRangeEnd(),
 539                         'ipb_deleted'          => intval( $this->mHideName ), // typecast required for SQLite
 540                         'ipb_block_email'      => $this->prevents( 'sendemail' ),
 541                         'ipb_allow_usertalk'   => !$this->prevents( 'editownusertalk' ),
 542                         'ipb_parent_block_id'  => $this->mParentBlockId
 543                 );
 544
 545                 return $a;
 546         }
 547
 548         /**
 549          * @return array
 550          */
 551         protected function getAutoblockUpdateArray() {
 552                 return array(
 553                         'ipb_by'               => $this->getBy(),
 554                         'ipb_by_text'          => $this->getByName(),
 555                         'ipb_reason'           => $this->mReason,
 556                         'ipb_create_account'   => $this->prevents( 'createaccount' ),
 557                         'ipb_deleted'          => (int)$this->mHideName, // typecast required for SQLite
 558                         'ipb_allow_usertalk'   => !$this->prevents( 'editownusertalk' ),
 559                 );
 560         }
 561
 562         /**
 563          * Retroactively autoblocks the last IP used by the user (if it is a user)
 564          * blocked by this Block.
 565          *
 566          * @return array Block IDs of retroactive autoblocks made
 567          */
 568         protected function doRetroactiveAutoblock() {
 569                 $blockIds = array();
 570                 # If autoblock is enabled, autoblock the LAST IP(s) used
 571                 if ( $this->isAutoblocking() && $this->getType() == self::TYPE_USER ) {
 572                         wfDebug( "Doing retroactive autoblocks for " . $this->getTarget() . "\n" );
 573
 574                         $continue = Hooks::run(
 575                                 'PerformRetroactiveAutoblock', array( $this, &$blockIds ) );
 576
 577                         if ( $continue ) {
 578                                 self::defaultRetroactiveAutoblock( $this, $blockIds );
 579                         }
 580                 }
 581                 return $blockIds;
 582         }
 583
 584         /**
 585          * Retroactively autoblocks the last IP used by the user (if it is a user)
 586          * blocked by this Block. This will use the recentchanges table.
 587          *
 588          * @param Block $block
 589          * @param array &$blockIds
 590          */
 591         protected static function defaultRetroactiveAutoblock( Block $block, array &$blockIds ) {
 592                 global $wgPutIPinRC;
 593
 594                 // No IPs are in recentchanges table, so nothing to select
 595                 if ( !$wgPutIPinRC ) {
 596                         return;
 597                 }
 598
 599                 $dbr = wfGetDB( DB_SLAVE );
 600
 601                 $options = array( 'ORDER BY' => 'rc_timestamp DESC' );
 602                 $conds = array( 'rc_user_text' => (string)$block->getTarget() );
 603
 604                 // Just the last IP used.
 605                 $options['LIMIT'] = 1;
 606
 607                 $res = $dbr->select( 'recentchanges', array( 'rc_ip' ), $conds,
 608                         __METHOD__, $options );
 609
 610                 if ( !$res->numRows() ) {
 611                         # No results, don't autoblock anything
 612                         wfDebug( "No IP found to retroactively autoblock\n" );
 613                 } else {
 614                         foreach ( $res as $row ) {
 615                                 if ( $row->rc_ip ) {
 616                                         $id = $block->doAutoblock( $row->rc_ip );
 617                                         if ( $id ) {
 618                                                 $blockIds[] = $id;
 619                                         }
 620                                 }
 621                         }
 622                 }
 623         }
 624
 625         /**
 626          * Checks whether a given IP is on the autoblock whitelist.
 627          * TODO: this probably belongs somewhere else, but not sure where...
 628          *
 629          * @param string $ip The IP to check
 630          * @return bool
 631          */
 632         public static function isWhitelistedFromAutoblocks( $ip ) {
 633                 global $wgMemc;
 634
 635                 // Try to get the autoblock_whitelist from the cache, as it's faster
 636                 // than getting the msg raw and explode()'ing it.
 637                 $key = wfMemcKey( 'ipb', 'autoblock', 'whitelist' );
 638                 $lines = $wgMemc->get( $key );
 639                 if ( !$lines ) {
 640                         $lines = explode( "\n", wfMessage( 'autoblock_whitelist' )->inContentLanguage()->plain() );
 641                         $wgMemc->set( $key, $lines, 3600 * 24 );
 642                 }
 643
 644                 wfDebug( "Checking the autoblock whitelist..\n" );
 645
 646                 foreach ( $lines as $line ) {
 647                         # List items only
 648                         if ( substr( $line, 0, 1 ) !== '*' ) {
 649                                 continue;
 650                         }
 651
 652                         $wlEntry = substr( $line, 1 );
 653                         $wlEntry = trim( $wlEntry );
 654
 655                         wfDebug( "Checking $ip against $wlEntry..." );
 656
 657                         # Is the IP in this range?
 658                         if ( IP::isInRange( $ip, $wlEntry ) ) {
 659                                 wfDebug( " IP $ip matches $wlEntry, not autoblocking\n" );
 660                                 return true;
 661                         } else {
 662                                 wfDebug( " No match\n" );
 663                         }
 664                 }
 665
 666                 return false;
 667         }
 668
 669         /**
 670          * Autoblocks the given IP, referring to this Block.
 671          *
 672          * @param string $autoblockIP The IP to autoblock.
 673          * @return int|bool Block ID if an autoblock was inserted, false if not.
 674          */
 675         public function doAutoblock( $autoblockIP ) {
 676                 # If autoblocks are disabled, go away.
 677                 if ( !$this->isAutoblocking() ) {
 678                         return false;
 679                 }
 680
 681                 # Check for presence on the autoblock whitelist.
 682                 if ( self::isWhitelistedFromAutoblocks( $autoblockIP ) ) {
 683                         return false;
 684                 }
 685
 686                 # Allow hooks to cancel the autoblock.
 687                 if ( !Hooks::run( 'AbortAutoblock', array( $autoblockIP, &$this ) ) ) {
 688                         wfDebug( "Autoblock aborted by hook.\n" );
 689                         return false;
 690                 }
 691
 692                 # It's okay to autoblock. Go ahead and insert/update the block...
 693
 694                 # Do not add a *new* block if the IP is already blocked.
 695                 $ipblock = Block::newFromTarget( $autoblockIP );
 696                 if ( $ipblock ) {
 697                         # Check if the block is an autoblock and would exceed the user block
 698                         # if renewed. If so, do nothing, otherwise prolong the block time...
 699                         if ( $ipblock->mAuto && // @todo Why not compare $ipblock->mExpiry?
 700                                 $this->mExpiry > Block::getAutoblockExpiry( $ipblock->mTimestamp )
 701                         ) {
 702                                 # Reset block timestamp to now and its expiry to
 703                                 # $wgAutoblockExpiry in the future
 704                                 $ipblock->updateTimestamp();
 705                         }
 706                         return false;
 707                 }
 708
 709                 # Make a new block object with the desired properties.
 710                 $autoblock = new Block;
 711                 wfDebug( "Autoblocking {$this->getTarget()}@" . $autoblockIP . "\n" );
 712                 $autoblock->setTarget( $autoblockIP );
 713                 $autoblock->setBlocker( $this->getBlocker() );
 714                 $autoblock->mReason = wfMessage( 'autoblocker', $this->getTarget(), $this->mReason )
 715                         ->inContentLanguage()->plain();
 716                 $timestamp = wfTimestampNow();
 717                 $autoblock->mTimestamp = $timestamp;
 718                 $autoblock->mAuto = 1;
 719                 $autoblock->prevents( 'createaccount', $this->prevents( 'createaccount' ) );
 720                 # Continue suppressing the name if needed
 721                 $autoblock->mHideName = $this->mHideName;
 722                 $autoblock->prevents( 'editownusertalk', $this->prevents( 'editownusertalk' ) );
 723                 $autoblock->mParentBlockId = $this->mId;
 724
 725                 if ( $this->mExpiry == 'infinity' ) {
 726                         # Original block was indefinite, start an autoblock now
 727                         $autoblock->mExpiry = Block::getAutoblockExpiry( $timestamp );
 728                 } else {
 729                         # If the user is already blocked with an expiry date, we don't
 730                         # want to pile on top of that.
 731                         $autoblock->mExpiry = min( $this->mExpiry, Block::getAutoblockExpiry( $timestamp ) );
 732                 }
 733
 734                 # Insert the block...
 735                 $status = $autoblock->insert();
 736                 return $status
 737                         ? $status['id']
 738                         : false;
 739         }
 740
 741         /**
 742          * Check if a block has expired. Delete it if it is.
 743          * @return bool
 744          */
 745         public function deleteIfExpired() {
 746
 747                 if ( $this->isExpired() ) {
 748                         wfDebug( "Block::deleteIfExpired() -- deleting\n" );
 749                         $this->delete();
 750                         $retVal = true;
 751                 } else {
 752                         wfDebug( "Block::deleteIfExpired() -- not expired\n" );
 753                         $retVal = false;
 754                 }
 755
 756                 return $retVal;
 757         }
 758
 759         /**
 760          * Has the block expired?
 761          * @return bool
 762          */
 763         public function isExpired() {
 764                 $timestamp = wfTimestampNow();
 765                 wfDebug( "Block::isExpired() checking current " . $timestamp . " vs $this->mExpiry\n" );
 766
 767                 if ( !$this->mExpiry ) {
 768                         return false;
 769                 } else {
 770                         return $timestamp > $this->mExpiry;
 771                 }
 772         }
 773
 774         /**
 775          * Is the block address valid (i.e. not a null string?)
 776          * @return bool
 777          */
 778         public function isValid() {
 779                 return $this->getTarget() != null;
 780         }
 781
 782         /**
 783          * Update the timestamp on autoblocks.
 784          */
 785         public function updateTimestamp() {
 786                 if ( $this->mAuto ) {
 787                         $this->mTimestamp = wfTimestamp();
 788                         $this->mExpiry = Block::getAutoblockExpiry( $this->mTimestamp );
 789
 790                         $dbw = wfGetDB( DB_MASTER );
 791                         $dbw->update( 'ipblocks',
 792                                 array( /* SET */
 793                                         'ipb_timestamp' => $dbw->timestamp( $this->mTimestamp ),
 794                                         'ipb_expiry' => $dbw->timestamp( $this->mExpiry ),
 795                                 ),
 796                                 array( /* WHERE */
 797                                         'ipb_address' => (string)$this->getTarget()
 798                                 ),
 799                                 __METHOD__
 800                         );
 801                 }
 802         }
 803
 804         /**
 805          * Get the IP address at the start of the range in Hex form
 806          * @throws MWException
 807          * @return string IP in Hex form
 808          */
 809         public function getRangeStart() {
 810                 switch ( $this->type ) {
 811                         case self::TYPE_USER:
 812                                 return '';
 813                         case self::TYPE_IP:
 814                                 return IP::toHex( $this->target );
 815                         case self::TYPE_RANGE:
 816                                 list( $start, /*...*/ ) = IP::parseRange( $this->target );
 817                                 return $start;
 818                         default:
 819                                 throw new MWException( "Block with invalid type" );
 820                 }
 821         }
 822
 823         /**
 824          * Get the IP address at the end of the range in Hex form
 825          * @throws MWException
 826          * @return string IP in Hex form
 827          */
 828         public function getRangeEnd() {
 829                 switch ( $this->type ) {
 830                         case self::TYPE_USER:
 831                                 return '';
 832                         case self::TYPE_IP:
 833                                 return IP::toHex( $this->target );
 834                         case self::TYPE_RANGE:
 835                                 list( /*...*/, $end ) = IP::parseRange( $this->target );
 836                                 return $end;
 837                         default:
 838                                 throw new MWException( "Block with invalid type" );
 839                 }
 840         }
 841
 842         /**
 843          * Get the user id of the blocking sysop
 844          *
 845          * @return int (0 for foreign users)
 846          */
 847         public function getBy() {
 848                 $blocker = $this->getBlocker();
 849                 return ( $blocker instanceof User )
 850                         ? $blocker->getId()
 851                         : 0;
 852         }
 853
 854         /**
 855          * Get the username of the blocking sysop
 856          *
 857          * @return string
 858          */
 859         public function getByName() {
 860                 $blocker = $this->getBlocker();
 861                 return ( $blocker instanceof User )
 862                         ? $blocker->getName()
 863                         : (string)$blocker; // username
 864         }
 865
 866         /**
 867          * Get the block ID
 868          * @return int
 869          */
 870         public function getId() {
 871                 return $this->mId;
 872         }
 873
 874         /**
 875          * Get/set a flag determining whether the master is used for reads
 876          *
 877          * @param bool|null $x
 878          * @return bool
 879          */
 880         public function fromMaster( $x = null ) {
 881                 return wfSetVar( $this->mFromMaster, $x );
 882         }
 883
 884         /**
 885          * Get/set whether the Block is a hardblock (affects logged-in users on a given IP/range)
 886          * @param bool|null $x
 887          * @return bool
 888          */
 889         public function isHardblock( $x = null ) {
 890                 wfSetVar( $this->isHardblock, $x );
 891
 892                 # You can't *not* hardblock a user
 893                 return $this->getType() == self::TYPE_USER
 894                         ? true
 895                         : $this->isHardblock;
 896         }
 897
 898         /**
 899          * @param null|bool $x
 900          * @return bool
 901          */
 902         public function isAutoblocking( $x = null ) {
 903                 wfSetVar( $this->isAutoblocking, $x );
 904
 905                 # You can't put an autoblock on an IP or range as we don't have any history to
 906                 # look over to get more IPs from
 907                 return $this->getType() == self::TYPE_USER
 908                         ? $this->isAutoblocking
 909                         : false;
 910         }
 911
 912         /**
 913          * Get/set whether the Block prevents a given action
 914          * @param string $action
 915          * @param bool|null $x
 916          * @return bool
 917          */
 918         public function prevents( $action, $x = null ) {
 919                 switch ( $action ) {
 920                         case 'edit':
 921                                 # For now... <evil laugh>
 922                                 return true;
 923
 924                         case 'createaccount':
 925                                 return wfSetVar( $this->mCreateAccount, $x );
 926
 927                         case 'sendemail':
 928                                 return wfSetVar( $this->mBlockEmail, $x );
 929
 930                         case 'editownusertalk':
 931                                 return wfSetVar( $this->mDisableUsertalk, $x );
 932
 933                         default:
 934                                 return null;
 935                 }
 936         }
 937
 938         /**
 939          * Get the block name, but with autoblocked IPs hidden as per standard privacy policy
 940          * @return string Text is escaped
 941          */
 942         public function getRedactedName() {
 943                 if ( $this->mAuto ) {
 944                         return Html::rawElement(
 945                                 'span',
 946                                 array( 'class' => 'mw-autoblockid' ),
 947                                 wfMessage( 'autoblockid', $this->mId )
 948                         );
 949                 } else {
 950                         return htmlspecialchars( $this->getTarget() );
 951                 }
 952         }
 953
 954         /**
 955          * Get a timestamp of the expiry for autoblocks
 956          *
 957          * @param string|int $timestamp
 958          * @return string
 959          */
 960         public static function getAutoblockExpiry( $timestamp ) {
 961                 global $wgAutoblockExpiry;
 962
 963                 return wfTimestamp( TS_MW, wfTimestamp( TS_UNIX, $timestamp ) + $wgAutoblockExpiry );
 964         }
 965
 966         /**
 967          * Purge expired blocks from the ipblocks table
 968          */
 969         public static function purgeExpired() {
 970                 if ( wfReadOnly() ) {
 971                         return;
 972                 }
 973
 974                 $method = __METHOD__;
 975                 $dbw = wfGetDB( DB_MASTER );
 976                 $dbw->onTransactionIdle( function () use ( $dbw, $method ) {
 977                         $dbw->delete( 'ipblocks',
 978                                 array( 'ipb_expiry < ' . $dbw->addQuotes( $dbw->timestamp() ) ), $method );
 979                 } );
 980         }
 981
 982         /**
 983          * Given a target and the target's type, get an existing Block object if possible.
 984          * @param string|User|int $specificTarget A block target, which may be one of several types:
 985          *     * A user to block, in which case $target will be a User
 986          *     * An IP to block, in which case $target will be a User generated by using
 987          *       User::newFromName( $ip, false ) to turn off name validation
 988          *     * An IP range, in which case $target will be a String "123.123.123.123/18" etc
 989          *     * The ID of an existing block, in the format "#12345" (since pure numbers are valid
 990          *       usernames
 991          *     Calling this with a user, IP address or range will not select autoblocks, and will
 992          *     only select a block where the targets match exactly (so looking for blocks on
 993          *     1.2.3.4 will not select 1.2.0.0/16 or even 1.2.3.4/32)
 994          * @param string|User|int $vagueTarget As above, but we will search for *any* block which
 995          *     affects that target (so for an IP address, get ranges containing that IP; and also
 996          *     get any relevant autoblocks). Leave empty or blank to skip IP-based lookups.
 997          * @param bool $fromMaster Whether to use the DB_MASTER database
 998          * @return Block|null (null if no relevant block could be found).  The target and type
 999          *     of the returned Block will refer to the actual block which was found, which might
1000          *     not be the same as the target you gave if you used $vagueTarget!
1001          */
1002         public static function newFromTarget( $specificTarget, $vagueTarget = null, $fromMaster = false ) {
1003
1004                 list( $target, $type ) = self::parseTarget( $specificTarget );
1005                 if ( $type == Block::TYPE_ID || $type == Block::TYPE_AUTO ) {
1006                         return Block::newFromID( $target );
1007
1008                 } elseif ( $target === null && $vagueTarget == '' ) {
1009                         # We're not going to find anything useful here
1010                         # Be aware that the == '' check is explicit, since empty values will be
1011                         # passed by some callers (bug 29116)
1012                         return null;
1013
1014                 } elseif ( in_array(
1015                         $type,
1016                         array( Block::TYPE_USER, Block::TYPE_IP, Block::TYPE_RANGE, null ) )
1017                 ) {
1018                         $block = new Block();
1019                         $block->fromMaster( $fromMaster );
1020
1021                         if ( $type !== null ) {
1022                                 $block->setTarget( $target );
1023                         }
1024
1025                         if ( $block->newLoad( $vagueTarget ) ) {
1026                                 return $block;
1027                         }
1028                 }
1029                 return null;
1030         }
1031
1032         /**
1033          * Get all blocks that match any IP from an array of IP addresses
1034          *
1035          * @param array $ipChain List of IPs (strings), usually retrieved from the
1036          *         X-Forwarded-For header of the request
1037          * @param bool $isAnon Exclude anonymous-only blocks if false
1038          * @param bool $fromMaster Whether to query the master or slave database
1039          * @return array Array of Blocks
1040          * @since 1.22
1041          */
1042         public static function getBlocksForIPList( array $ipChain, $isAnon, $fromMaster = false ) {
1043                 if ( !count( $ipChain ) ) {
1044                         return array();
1045                 }
1046
1047                 $conds = array();
1048                 foreach ( array_unique( $ipChain ) as $ipaddr ) {
1049                         # Discard invalid IP addresses. Since XFF can be spoofed and we do not
1050                         # necessarily trust the header given to us, make sure that we are only
1051                         # checking for blocks on well-formatted IP addresses (IPv4 and IPv6).
1052                         # Do not treat private IP spaces as special as it may be desirable for wikis
1053                         # to block those IP ranges in order to stop misbehaving proxies that spoof XFF.
1054                         if ( !IP::isValid( $ipaddr ) ) {
1055                                 continue;
1056                         }
1057                         # Don't check trusted IPs (includes local squids which will be in every request)
1058                         if ( IP::isTrustedProxy( $ipaddr ) ) {
1059                                 continue;
1060                         }
1061                         # Check both the original IP (to check against single blocks), as well as build
1062                         # the clause to check for rangeblocks for the given IP.
1063                         $conds['ipb_address'][] = $ipaddr;
1064                         $conds[] = self::getRangeCond( IP::toHex( $ipaddr ) );
1065                 }
1066
1067                 if ( !count( $conds ) ) {
1068                         return array();
1069                 }
1070
1071                 if ( $fromMaster ) {
1072                         $db = wfGetDB( DB_MASTER );
1073                 } else {
1074                         $db = wfGetDB( DB_SLAVE );
1075                 }
1076                 $conds = $db->makeList( $conds, LIST_OR );
1077                 if ( !$isAnon ) {
1078                         $conds = array( $conds, 'ipb_anon_only' => 0 );
1079                 }
1080                 $selectFields = array_merge(
1081                         array( 'ipb_range_start', 'ipb_range_end' ),
1082                         Block::selectFields()
1083                 );
1084                 $rows = $db->select( 'ipblocks',
1085                         $selectFields,
1086                         $conds,
1087                         __METHOD__
1088                 );
1089
1090                 $blocks = array();
1091                 foreach ( $rows as $row ) {
1092                         $block = self::newFromRow( $row );
1093                         if ( !$block->deleteIfExpired()  ) {
1094                                 $blocks[] = $block;
1095                         }
1096                 }
1097
1098                 return $blocks;
1099         }
1100
1101         /**
1102          * From a list of multiple blocks, find the most exact and strongest Block.
1103          *
1104          * The logic for finding the "best" block is:
1105          *  - Blocks that match the block's target IP are preferred over ones in a range
1106          *  - Hardblocks are chosen over softblocks that prevent account creation
1107          *  - Softblocks that prevent account creation are chosen over other softblocks
1108          *  - Other softblocks are chosen over autoblocks
1109          *  - If there are multiple exact or range blocks at the same level, the one chosen
1110          *    is random
1111          * This should be used when $blocks where retrieved from the user's IP address
1112          * and $ipChain is populated from the same IP address information.
1113          *
1114          * @param array $blocks Array of Block objects
1115          * @param array $ipChain List of IPs (strings). This is used to determine how "close"
1116          *        a block is to the server, and if a block matches exactly, or is in a range.
1117          *        The order is furthest from the server to nearest e.g., (Browser, proxy1, proxy2,
1118          *        local-squid, ...)
1119          * @throws MWException
1120          * @return Block|null The "best" block from the list
1121          */
1122         public static function chooseBlock( array $blocks, array $ipChain ) {
1123                 if ( !count( $blocks ) ) {
1124                         return null;
1125                 } elseif ( count( $blocks ) == 1 ) {
1126                         return $blocks[0];
1127                 }
1128
1129                 // Sort hard blocks before soft ones and secondarily sort blocks
1130                 // that disable account creation before those that don't.
1131                 usort( $blocks, function ( Block $a, Block $b ) {
1132                         $aWeight = (int)$a->isHardblock() . (int)$a->prevents( 'createaccount' );
1133                         $bWeight = (int)$b->isHardblock() . (int)$b->prevents( 'createaccount' );
1134                         return strcmp( $bWeight, $aWeight ); // highest weight first
1135                 } );
1136
1137                 $blocksListExact = array(
1138                         'hard' => false,
1139                         'disable_create' => false,
1140                         'other' => false,
1141                         'auto' => false
1142                 );
1143                 $blocksListRange = array(
1144                         'hard' => false,
1145                         'disable_create' => false,
1146                         'other' => false,
1147                         'auto' => false
1148                 );
1149                 $ipChain = array_reverse( $ipChain );
1150
1151                 /** @var Block $block */
1152                 foreach ( $blocks as $block ) {
1153                         // Stop searching if we have already have a "better" block. This
1154                         // is why the order of the blocks matters
1155                         if ( !$block->isHardblock() && $blocksListExact['hard'] ) {
1156                                 break;
1157                         } elseif ( !$block->prevents( 'createaccount' ) && $blocksListExact['disable_create'] ) {
1158                                 break;
1159                         }
1160
1161                         foreach ( $ipChain as $checkip ) {
1162                                 $checkipHex = IP::toHex( $checkip );
1163                                 if ( (string)$block->getTarget() === $checkip ) {
1164                                         if ( $block->isHardblock() ) {
1165                                                 $blocksListExact['hard'] = $blocksListExact['hard'] ?: $block;
1166                                         } elseif ( $block->prevents( 'createaccount' ) ) {
1167                                                 $blocksListExact['disable_create'] = $blocksListExact['disable_create'] ?: $block;
1168                                         } elseif ( $block->mAuto ) {
1169                                                 $blocksListExact['auto'] = $blocksListExact['auto'] ?: $block;
1170                                         } else {
1171                                                 $blocksListExact['other'] = $blocksListExact['other'] ?: $block;
1172                                         }
1173                                         // We found closest exact match in the ip list, so go to the next Block
1174                                         break;
1175                                 } elseif ( array_filter( $blocksListExact ) == array()
1176                                         && $block->getRangeStart() <= $checkipHex
1177                                         && $block->getRangeEnd() >= $checkipHex
1178                                 ) {
1179                                         if ( $block->isHardblock() ) {
1180                                                 $blocksListRange['hard'] = $blocksListRange['hard'] ?: $block;
1181                                         } elseif ( $block->prevents( 'createaccount' ) ) {
1182                                                 $blocksListRange['disable_create'] = $blocksListRange['disable_create'] ?: $block;
1183                                         } elseif ( $block->mAuto ) {
1184                                                 $blocksListRange['auto'] = $blocksListRange['auto'] ?: $block;
1185                                         } else {
1186                                                 $blocksListRange['other'] = $blocksListRange['other'] ?: $block;
1187                                         }
1188                                         break;
1189                                 }
1190                         }
1191                 }
1192
1193                 if ( array_filter( $blocksListExact ) == array() ) {
1194                         $blocksList = &$blocksListRange;
1195                 } else {
1196                         $blocksList = &$blocksListExact;
1197                 }
1198
1199                 $chosenBlock = null;
1200                 if ( $blocksList['hard'] ) {
1201                         $chosenBlock = $blocksList['hard'];
1202                 } elseif ( $blocksList['disable_create'] ) {
1203                         $chosenBlock = $blocksList['disable_create'];
1204                 } elseif ( $blocksList['other'] ) {
1205                         $chosenBlock = $blocksList['other'];
1206                 } elseif ( $blocksList['auto'] ) {
1207                         $chosenBlock = $blocksList['auto'];
1208                 } else {
1209                         throw new MWException( "Proxy block found, but couldn't be classified." );
1210                 }
1211
1212                 return $chosenBlock;
1213         }
1214
1215         /**
1216          * From an existing Block, get the target and the type of target.
1217          * Note that, except for null, it is always safe to treat the target
1218          * as a string; for User objects this will return User::__toString()
1219          * which in turn gives User::getName().
1220          *
1221          * @param string|int|User|null $target
1222          * @return array( User|String|null, Block::TYPE_ constant|null )
1223          */
1224         public static function parseTarget( $target ) {
1225                 # We may have been through this before
1226                 if ( $target instanceof User ) {
1227                         if ( IP::isValid( $target->getName() ) ) {
1228                                 return array( $target, self::TYPE_IP );
1229                         } else {
1230                                 return array( $target, self::TYPE_USER );
1231                         }
1232                 } elseif ( $target === null ) {
1233                         return array( null, null );
1234                 }
1235
1236                 $target = trim( $target );
1237
1238                 if ( IP::isValid( $target ) ) {
1239                         # We can still create a User if it's an IP address, but we need to turn
1240                         # off validation checking (which would exclude IP addresses)
1241                         return array(
1242                                 User::newFromName( IP::sanitizeIP( $target ), false ),
1243                                 Block::TYPE_IP
1244                         );
1245
1246                 } elseif ( IP::isValidBlock( $target ) ) {
1247                         # Can't create a User from an IP range
1248                         return array( IP::sanitizeRange( $target ), Block::TYPE_RANGE );
1249                 }
1250
1251                 # Consider the possibility that this is not a username at all
1252                 # but actually an old subpage (bug #29797)
1253                 if ( strpos( $target, '/' ) !== false ) {
1254                         # An old subpage, drill down to the user behind it
1255                         $parts = explode( '/', $target );
1256                         $target = $parts[0];
1257                 }
1258
1259                 $userObj = User::newFromName( $target );
1260                 if ( $userObj instanceof User ) {
1261                         # Note that since numbers are valid usernames, a $target of "12345" will be
1262                         # considered a User.  If you want to pass a block ID, prepend a hash "#12345",
1263                         # since hash characters are not valid in usernames or titles generally.
1264                         return array( $userObj, Block::TYPE_USER );
1265
1266                 } elseif ( preg_match( '/^#\d+$/', $target ) ) {
1267                         # Autoblock reference in the form "#12345"
1268                         return array( substr( $target, 1 ), Block::TYPE_AUTO );
1269
1270                 } else {
1271                         # WTF?
1272                         return array( null, null );
1273                 }
1274         }
1275
1276         /**
1277          * Get the type of target for this particular block
1278          * @return int Block::TYPE_ constant, will never be TYPE_ID
1279          */
1280         public function getType() {
1281                 return $this->mAuto
1282                         ? self::TYPE_AUTO
1283                         : $this->type;
1284         }
1285
1286         /**
1287          * Get the target and target type for this particular Block.  Note that for autoblocks,
1288          * this returns the unredacted name; frontend functions need to call $block->getRedactedName()
1289          * in this situation.
1290          * @return array( User|String, Block::TYPE_ constant )
1291          * @todo FIXME: This should be an integral part of the Block member variables
1292          */
1293         public function getTargetAndType() {
1294                 return array( $this->getTarget(), $this->getType() );
1295         }
1296
1297         /**
1298          * Get the target for this particular Block.  Note that for autoblocks,
1299          * this returns the unredacted name; frontend functions need to call $block->getRedactedName()
1300          * in this situation.
1301          * @return User|string
1302          */
1303         public function getTarget() {
1304                 return $this->target;
1305         }
1306
1307         /**
1308          * @since 1.19
1309          *
1310          * @return mixed|string
1311          */
1312         public function getExpiry() {
1313                 return $this->mExpiry;
1314         }
1315
1316         /**
1317          * Set the target for this block, and update $this->type accordingly
1318          * @param mixed $target
1319          */
1320         public function setTarget( $target ) {
1321                 list( $this->target, $this->type ) = self::parseTarget( $target );
1322         }
1323
1324         /**
1325          * Get the user who implemented this block
1326          * @return User|string Local User object or string for a foreign user
1327          */
1328         public function getBlocker() {
1329                 return $this->blocker;
1330         }
1331
1332         /**
1333          * Set the user who implemented (or will implement) this block
1334          * @param User|string $user Local User object or username string for foreign users
1335          */
1336         public function setBlocker( $user ) {
1337                 $this->blocker = $user;
1338         }
1339
1340         /**
1341          * Get the key and parameters for the corresponding error message.
1342          *
1343          * @since 1.22
1344          * @param IContextSource $context
1345          * @return array
1346          */
1347         public function getPermissionsError( IContextSource $context ) {
1348                 $blocker = $this->getBlocker();
1349                 if ( $blocker instanceof User ) { // local user
1350                         $blockerUserpage = $blocker->getUserPage();
1351                         $link = "[[{$blockerUserpage->getPrefixedText()}|{$blockerUserpage->getText()}]]";
1352                 } else { // foreign user
1353                         $link = $blocker;
1354                 }
1355
1356                 $reason = $this->mReason;
1357                 if ( $reason == '' ) {
1358                         $reason = $context->msg( 'blockednoreason' )->text();
1359                 }
1360
1361                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
1362                  * This could be a username, an IP range, or a single IP. */
1363                 $intended = $this->getTarget();
1364
1365                 $lang = $context->getLanguage();
1366                 return array(
1367                         $this->mAuto ? 'autoblockedtext' : 'blockedtext',
1368                         $link,
1369                         $reason,
1370                         $context->getRequest()->getIP(),
1371                         $this->getByName(),
1372                         $this->getId(),
1373                         $lang->formatExpiry( $this->mExpiry ),
1374                         (string)$intended,
1375                         $lang->userTimeAndDate( $this->mTimestamp, $context->getUser() ),
1376                 );
1377         }
1378 }