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