includes/Block.php

   1 <?php
   2 /**
   3  * @file
   4  * Blocks and bans object
   5  */
   6
   7 /**
   8  * The block class
   9  * All the functions in this class assume the object is either explicitly
  10  * loaded or filled. It is not load-on-demand. There are no accessors.
  11  *
  12  * Globals used: $wgAutoblockExpiry, $wgAntiLockFlags
  13  *
  14  * @todo This could be used everywhere, but it isn't.
  15  */
  16 class Block {
  17         /* public*/ var $mAddress, $mUser, $mBy, $mReason, $mTimestamp, $mAuto, $mId, $mExpiry,
  18                                 $mRangeStart, $mRangeEnd, $mAnonOnly, $mEnableAutoblock, $mHideName,
  19                                 $mBlockEmail, $mByName, $mAngryAutoblock, $mAllowUsertalk;
  20         /* private */ var $mNetworkBits, $mIntegerAddr, $mForUpdate, $mFromMaster;
  21
  22         const EB_KEEP_EXPIRED = 1;
  23         const EB_FOR_UPDATE = 2;
  24         const EB_RANGE_ONLY = 4;
  25
  26         function __construct( $address = '', $user = 0, $by = 0, $reason = '',
  27                 $timestamp = '' , $auto = 0, $expiry = '', $anonOnly = 0, $createAccount = 0, $enableAutoblock = 0,
  28                 $hideName = 0, $blockEmail = 0, $allowUsertalk = 0 )
  29         {
  30                 $this->mId = 0;
  31                 # Expand valid IPv6 addresses
  32                 $address = IP::sanitizeIP( $address );
  33                 $this->mAddress = $address;
  34                 $this->mUser = $user;
  35                 $this->mBy = $by;
  36                 $this->mReason = $reason;
  37                 $this->mTimestamp = wfTimestamp(TS_MW,$timestamp);
  38                 $this->mAuto = $auto;
  39                 $this->mAnonOnly = $anonOnly;
  40                 $this->mCreateAccount = $createAccount;
  41                 $this->mExpiry = self::decodeExpiry( $expiry );
  42                 $this->mEnableAutoblock = $enableAutoblock;
  43                 $this->mHideName = $hideName;
  44                 $this->mBlockEmail = $blockEmail;
  45                 $this->mAllowUsertalk = $allowUsertalk;
  46                 $this->mForUpdate = false;
  47                 $this->mFromMaster = false;
  48                 $this->mByName = false;
  49                 $this->mAngryAutoblock = false;
  50                 $this->initialiseRange();
  51         }
  52
  53         /**
  54          * Load a block from the database, using either the IP address or
  55          * user ID. Tries the user ID first, and if that doesn't work, tries
  56          * the address.
  57          *
  58          * @param $address String: IP address of user/anon
  59          * @param $user Integer: user id of user
  60          * @param $killExpired Boolean: delete expired blocks on load
  61          * @return Block Object
  62          */
  63         public static function newFromDB( $address, $user = 0, $killExpired = true ) {
  64                 $block = new Block;
  65                 $block->load( $address, $user, $killExpired );
  66                 if ( $block->isValid() ) {
  67                         return $block;
  68                 } else {
  69                         return null;
  70                 }
  71         }
  72
  73         /**
  74          * Load a blocked user from their block id.
  75          *
  76          * @param $id Integer: Block id to search for
  77          * @return Block object
  78          */
  79         public static function newFromID( $id ) {
  80                 $dbr = wfGetDB( DB_SLAVE );
  81                 $res = $dbr->resultObject( $dbr->select( 'ipblocks', '*',
  82                         array( 'ipb_id' => $id ), __METHOD__ ) );
  83                 $block = new Block;
  84                 if ( $block->loadFromResult( $res ) ) {
  85                         return $block;
  86                 } else {
  87                         return null;
  88                 }
  89         }
  90
  91         /**
  92          * Check if two blocks are effectively equal
  93          *
  94          * @return Boolean
  95          */
  96         public function equals( Block $block ) {
  97                 return (
  98                         $this->mAddress == $block->mAddress
  99                         && $this->mUser == $block->mUser
 100                         && $this->mAuto == $block->mAuto
 101                         && $this->mAnonOnly == $block->mAnonOnly
 102                         && $this->mCreateAccount == $block->mCreateAccount
 103                         && $this->mExpiry == $block->mExpiry
 104                         && $this->mEnableAutoblock == $block->mEnableAutoblock
 105                         && $this->mHideName == $block->mHideName
 106                         && $this->mBlockEmail == $block->mBlockEmail
 107                         && $this->mAllowUsertalk == $block->mAllowUsertalk
 108                         && $this->mReason == $block->mReason
 109                 );
 110         }
 111
 112         /**
 113          * Clear all member variables in the current object. Does not clear
 114          * the block from the DB.
 115          */
 116         public function clear() {
 117                 $this->mAddress = $this->mReason = $this->mTimestamp = '';
 118                 $this->mId = $this->mAnonOnly = $this->mCreateAccount =
 119                         $this->mEnableAutoblock = $this->mAuto = $this->mUser =
 120                         $this->mBy = $this->mHideName = $this->mBlockEmail = $this->mAllowUsertalk = 0;
 121                 $this->mByName = false;
 122         }
 123
 124         /**
 125          * Get the DB object and set the reference parameter to the select options.
 126          * The options array will contain FOR UPDATE if appropriate.
 127          *
 128          * @param $options Array
 129          * @return Database
 130          */
 131         protected function &getDBOptions( &$options ) {
 132                 global $wgAntiLockFlags;
 133                 if ( $this->mForUpdate || $this->mFromMaster ) {
 134                         $db = wfGetDB( DB_MASTER );
 135                         if ( !$this->mForUpdate || ($wgAntiLockFlags & ALF_NO_BLOCK_LOCK) ) {
 136                                 $options = array();
 137                         } else {
 138                                 $options = array( 'FOR UPDATE' );
 139                         }
 140                 } else {
 141                         $db = wfGetDB( DB_SLAVE );
 142                         $options = array();
 143                 }
 144                 return $db;
 145         }
 146
 147         /**
 148          * Get a block from the DB, with either the given address or the given username
 149          *
 150          * @param $address string The IP address of the user, or blank to skip IP blocks
 151          * @param $user int The user ID, or zero for anonymous users
 152          * @param $killExpired bool Whether to delete expired rows while loading
 153          * @return Boolean: the user is blocked from editing
 154          *
 155          */
 156         public function load( $address = '', $user = 0, $killExpired = true ) {
 157                 wfDebug( "Block::load: '$address', '$user', $killExpired\n" );
 158
 159                 $options = array();
 160                 $db =& $this->getDBOptions( $options );
 161
 162                 if ( 0 == $user && $address == '' ) {
 163                         # Invalid user specification, not blocked
 164                         $this->clear();
 165                         return false;
 166                 }
 167
 168                 # Try user block
 169                 if ( $user ) {
 170                         $res = $db->resultObject( $db->select( 'ipblocks', '*', array( 'ipb_user' => $user ),
 171                                 __METHOD__, $options ) );
 172                         if ( $this->loadFromResult( $res, $killExpired ) ) {
 173                                 return true;
 174                         }
 175                 }
 176
 177                 # Try IP block
 178                 # TODO: improve performance by merging this query with the autoblock one
 179                 # Slightly tricky while handling killExpired as well
 180                 if ( $address ) {
 181                         $conds = array( 'ipb_address' => $address, 'ipb_auto' => 0 );
 182                         $res = $db->resultObject( $db->select( 'ipblocks', '*', $conds, __METHOD__, $options ) );
 183                         if ( $this->loadFromResult( $res, $killExpired ) ) {
 184                                 if ( $user && $this->mAnonOnly ) {
 185                                         # Block is marked anon-only
 186                                         # Whitelist this IP address against autoblocks and range blocks
 187                                         # (but not account creation blocks -- bug 13611)
 188                                         if( !$this->mCreateAccount ) {
 189                                                 $this->clear();
 190                                         }
 191                                         return false;
 192                                 } else {
 193                                         return true;
 194                                 }
 195                         }
 196                 }
 197
 198                 # Try range block
 199                 if ( $this->loadRange( $address, $killExpired, $user ) ) {
 200                         if ( $user && $this->mAnonOnly ) {
 201                                 # Respect account creation blocks on logged-in users -- bug 13611
 202                                 if( !$this->mCreateAccount ) {
 203                                         $this->clear();
 204                                 }
 205                                 return false;
 206                         } else {
 207                                 return true;
 208                         }
 209                 }
 210
 211                 # Try autoblock
 212                 if ( $address ) {
 213                         $conds = array( 'ipb_address' => $address, 'ipb_auto' => 1 );
 214                         if ( $user ) {
 215                                 $conds['ipb_anon_only'] = 0;
 216                         }
 217                         $res = $db->resultObject( $db->select( 'ipblocks', '*', $conds, __METHOD__, $options ) );
 218                         if ( $this->loadFromResult( $res, $killExpired ) ) {
 219                                 return true;
 220                         }
 221                 }
 222
 223                 # Give up
 224                 $this->clear();
 225                 return false;
 226         }
 227
 228         /**
 229          * Fill in member variables from a result wrapper
 230          *
 231          * @param $res ResultWrapper: row from the ipblocks table
 232          * @param $killExpired Boolean: whether to delete expired rows while loading
 233          * @return Boolean
 234          */
 235         protected function loadFromResult( ResultWrapper $res, $killExpired = true ) {
 236                 $ret = false;
 237                 if ( 0 != $res->numRows() ) {
 238                         # Get first block
 239                         $row = $res->fetchObject();
 240                         $this->initFromRow( $row );
 241
 242                         if ( $killExpired ) {
 243                                 # If requested, delete expired rows
 244                                 do {
 245                                         $killed = $this->deleteIfExpired();
 246                                         if ( $killed ) {
 247                                                 $row = $res->fetchObject();
 248                                                 if ( $row ) {
 249                                                         $this->initFromRow( $row );
 250                                                 }
 251                                         }
 252                                 } while ( $killed && $row );
 253
 254                                 # If there were any left after the killing finished, return true
 255                                 if ( $row ) {
 256                                         $ret = true;
 257                                 }
 258                         } else {
 259                                 $ret = true;
 260                         }
 261                 }
 262                 $res->free();
 263                 return $ret;
 264         }
 265
 266         /**
 267          * Search the database for any range blocks matching the given address, and
 268          * load the row if one is found.
 269          *
 270          * @param $address String: IP address range
 271          * @param $killExpired Boolean: whether to delete expired rows while loading
 272          * @param $userid Integer: if not 0, then sets ipb_anon_only
 273          * @return Boolean
 274          */
 275         public function loadRange( $address, $killExpired = true, $user = 0 ) {
 276                 $iaddr = IP::toHex( $address );
 277                 if ( $iaddr === false ) {
 278                         # Invalid address
 279                         return false;
 280                 }
 281
 282                 # Only scan ranges which start in this /16, this improves search speed
 283                 # Blocks should not cross a /16 boundary.
 284                 $range = substr( $iaddr, 0, 4 );
 285
 286                 $options = array();
 287                 $db =& $this->getDBOptions( $options );
 288                 $conds = array(
 289                         "ipb_range_start LIKE '$range%'",
 290                         "ipb_range_start <= '$iaddr'",
 291                         "ipb_range_end >= '$iaddr'"
 292                 );
 293
 294                 if ( $user ) {
 295                         $conds['ipb_anon_only'] = 0;
 296                 }
 297
 298                 $res = $db->resultObject( $db->select( 'ipblocks', '*', $conds, __METHOD__, $options ) );
 299                 $success = $this->loadFromResult( $res, $killExpired );
 300                 return $success;
 301         }
 302
 303         /**
 304          * Given a database row from the ipblocks table, initialize
 305          * member variables
 306          *
 307          * @param $row ResultWrapper: a row from the ipblocks table
 308          */
 309         public function initFromRow( $row ) {
 310                 $this->mAddress = $row->ipb_address;
 311                 $this->mReason = $row->ipb_reason;
 312                 $this->mTimestamp = wfTimestamp(TS_MW,$row->ipb_timestamp);
 313                 $this->mUser = $row->ipb_user;
 314                 $this->mBy = $row->ipb_by;
 315                 $this->mAuto = $row->ipb_auto;
 316                 $this->mAnonOnly = $row->ipb_anon_only;
 317                 $this->mCreateAccount = $row->ipb_create_account;
 318                 $this->mEnableAutoblock = $row->ipb_enable_autoblock;
 319                 $this->mBlockEmail = $row->ipb_block_email;
 320                 $this->mAllowUsertalk = $row->ipb_allow_usertalk;
 321                 $this->mHideName = $row->ipb_deleted;
 322                 $this->mId = $row->ipb_id;
 323                 $this->mExpiry = self::decodeExpiry( $row->ipb_expiry );
 324                 if ( isset( $row->user_name ) ) {
 325                         $this->mByName = $row->user_name;
 326                 } else {
 327                         $this->mByName = $row->ipb_by_text;
 328                 }
 329                 $this->mRangeStart = $row->ipb_range_start;
 330                 $this->mRangeEnd = $row->ipb_range_end;
 331         }
 332
 333         /**
 334          * Once $mAddress has been set, get the range they came from.
 335          * Wrapper for IP::parseRange
 336          */
 337         protected function initialiseRange() {
 338                 $this->mRangeStart = '';
 339                 $this->mRangeEnd = '';
 340
 341                 if ( $this->mUser == 0 ) {
 342                         list( $this->mRangeStart, $this->mRangeEnd ) = IP::parseRange( $this->mAddress );
 343                 }
 344         }
 345
 346         /**
 347          * Delete the row from the IP blocks table.
 348          *
 349          * @return Boolean
 350          */
 351         public function delete() {
 352                 if ( wfReadOnly() ) {
 353                         return false;
 354                 }
 355                 if ( !$this->mId ) {
 356                         throw new MWException( "Block::delete() now requires that the mId member be filled\n" );
 357                 }
 358
 359                 $dbw = wfGetDB( DB_MASTER );
 360                 $dbw->delete( 'ipblocks', array( 'ipb_id' => $this->mId ), __METHOD__ );
 361                 return $dbw->affectedRows() > 0;
 362         }
 363
 364         /**
 365          * Insert a block into the block table. Will fail if there is a conflicting
 366          * block (same name and options) already in the database.
 367          *
 368          * @return Boolean: whether or not the insertion was successful.
 369          */
 370         public function insert() {
 371                 wfDebug( "Block::insert; timestamp {$this->mTimestamp}\n" );
 372                 $dbw = wfGetDB( DB_MASTER );
 373
 374                 $this->validateBlockParams();
 375                 $this->initialiseRange();
 376
 377                 # Don't collide with expired blocks
 378                 Block::purgeExpired();
 379
 380                 $ipb_id = $dbw->nextSequenceValue('ipblocks_ipb_id_val');
 381                 $dbw->insert( 'ipblocks',
 382                         array(
 383                                 'ipb_id' => $ipb_id,
 384                                 'ipb_address' => $this->mAddress,
 385                                 'ipb_user' => $this->mUser,
 386                                 'ipb_by' => $this->mBy,
 387                                 'ipb_by_text' => $this->mByName,
 388                                 'ipb_reason' => $this->mReason,
 389                                 'ipb_timestamp' => $dbw->timestamp($this->mTimestamp),
 390                                 'ipb_auto' => $this->mAuto,
 391                                 'ipb_anon_only' => $this->mAnonOnly,
 392                                 'ipb_create_account' => $this->mCreateAccount,
 393                                 'ipb_enable_autoblock' => $this->mEnableAutoblock,
 394                                 'ipb_expiry' => self::encodeExpiry( $this->mExpiry, $dbw ),
 395                                 'ipb_range_start' => $this->mRangeStart,
 396                                 'ipb_range_end' => $this->mRangeEnd,
 397                                 'ipb_deleted'   => $this->mHideName,
 398                                 'ipb_block_email' => $this->mBlockEmail,
 399                                 'ipb_allow_usertalk' => $this->mAllowUsertalk
 400                         ), 'Block::insert', array( 'IGNORE' )
 401                 );
 402                 $affected = $dbw->affectedRows();
 403
 404                 if ($affected)
 405                         $this->doRetroactiveAutoblock();
 406
 407                 return (bool)$affected;
 408         }
 409
 410         /**
 411          * Update a block in the DB with new parameters.
 412          * The ID field needs to be loaded first.
 413          */
 414         public function update() {
 415                 wfDebug( "Block::update; timestamp {$this->mTimestamp}\n" );
 416                 $dbw = wfGetDB( DB_MASTER );
 417
 418                 $this->validateBlockParams();
 419
 420                 $dbw->update( 'ipblocks',
 421                         array(
 422                                 'ipb_user' => $this->mUser,
 423                                 'ipb_by' => $this->mBy,
 424                                 'ipb_by_text' => $this->mByName,
 425                                 'ipb_reason' => $this->mReason,
 426                                 'ipb_timestamp' => $dbw->timestamp($this->mTimestamp),
 427                                 'ipb_auto' => $this->mAuto,
 428                                 'ipb_anon_only' => $this->mAnonOnly,
 429                                 'ipb_create_account' => $this->mCreateAccount,
 430                                 'ipb_enable_autoblock' => $this->mEnableAutoblock,
 431                                 'ipb_expiry' => self::encodeExpiry( $this->mExpiry, $dbw ),
 432                                 'ipb_range_start' => $this->mRangeStart,
 433                                 'ipb_range_end' => $this->mRangeEnd,
 434                                 'ipb_deleted'   => $this->mHideName,
 435                                 'ipb_block_email' => $this->mBlockEmail,
 436                                 'ipb_allow_usertalk' => $this->mAllowUsertalk ),
 437                         array( 'ipb_id' => $this->mId ),
 438                         'Block::update' );
 439
 440                 return $dbw->affectedRows();
 441         }
 442
 443         /**
 444          * Make sure all the proper members are set to sane values
 445          * before adding/updating a block
 446          */
 447         protected function validateBlockParams() {
 448                 # Unset ipb_anon_only for user blocks, makes no sense
 449                 if ( $this->mUser ) {
 450                         $this->mAnonOnly = 0;
 451                 }
 452
 453                 # Unset ipb_enable_autoblock for IP blocks, makes no sense
 454                 if ( !$this->mUser ) {
 455                         $this->mEnableAutoblock = 0;
 456
 457                 }
 458                 # bug 18860: non-anon-only IP blocks should be allowed to block email
 459                 if ( !$this->mUser && $this->mAnonOnly ) {
 460                         $this->mBlockEmail = 0;
 461                 }
 462                 if( !$this->mByName ) {
 463                         if( $this->mBy ) {
 464                                 $this->mByName = User::whoIs( $this->mBy );
 465                         } else {
 466                                 global $wgUser;
 467                                 $this->mByName = $wgUser->getName();
 468                         }
 469                 }
 470         }
 471
 472
 473         /**
 474         * Retroactively autoblocks the last IP used by the user (if it is a user)
 475         * blocked by this Block.
 476         *
 477         * @return Boolean: whether or not a retroactive autoblock was made.
 478         */
 479         public function doRetroactiveAutoblock() {
 480                 $dbr = wfGetDB( DB_SLAVE );
 481                 #If autoblock is enabled, autoblock the LAST IP used
 482                 # - stolen shamelessly from CheckUser_body.php
 483
 484                 if ($this->mEnableAutoblock && $this->mUser) {
 485                         wfDebug("Doing retroactive autoblocks for " . $this->mAddress . "\n");
 486
 487                         $options = array( 'ORDER BY' => 'rc_timestamp DESC' );
 488                         $conds = array( 'rc_user_text' => $this->mAddress );
 489
 490                         if ($this->mAngryAutoblock) {
 491                                 // Block any IP used in the last 7 days. Up to five IPs.
 492                                 $conds[] = 'rc_timestamp < ' . $dbr->addQuotes( $dbr->timestamp( time() - (7*86400) ) );
 493                                 $options['LIMIT'] = 5;
 494                         } else {
 495                                 // Just the last IP used.
 496                                 $options['LIMIT'] = 1;
 497                         }
 498
 499                         $res = $dbr->select( 'recentchanges', array( 'rc_ip' ), $conds,
 500                                 __METHOD__ ,  $options);
 501
 502                         if ( !$dbr->numRows( $res ) ) {
 503                                 #No results, don't autoblock anything
 504                                 wfDebug("No IP found to retroactively autoblock\n");
 505                         } else {
 506                                 while ( $row = $dbr->fetchObject( $res ) ) {
 507                                         if ( $row->rc_ip )
 508                                                 $this->doAutoblock( $row->rc_ip );
 509                                 }
 510                         }
 511                 }
 512         }
 513
 514         /**
 515          * Checks whether a given IP is on the autoblock whitelist.
 516          *
 517          * @param $ip String: The IP to check
 518          * @return Boolean
 519          */
 520         public static function isWhitelistedFromAutoblocks( $ip ) {
 521                 global $wgMemc;
 522
 523                 // Try to get the autoblock_whitelist from the cache, as it's faster
 524                 // than getting the msg raw and explode()'ing it.
 525                 $key = wfMemcKey( 'ipb', 'autoblock', 'whitelist' );
 526                 $lines = $wgMemc->get( $key );
 527                 if ( !$lines ) {
 528                         $lines = explode( "\n", wfMsgForContentNoTrans( 'autoblock_whitelist' ) );
 529                         $wgMemc->set( $key, $lines, 3600 * 24 );
 530                 }
 531
 532                 wfDebug("Checking the autoblock whitelist..\n");
 533
 534                 foreach( $lines as $line ) {
 535                         # List items only
 536                         if ( substr( $line, 0, 1 ) !== '*' ) {
 537                                 continue;
 538                         }
 539
 540                         $wlEntry = substr($line, 1);
 541                         $wlEntry = trim($wlEntry);
 542
 543                         wfDebug("Checking $ip against $wlEntry...");
 544
 545                         # Is the IP in this range?
 546                         if (IP::isInRange( $ip, $wlEntry )) {
 547                                 wfDebug(" IP $ip matches $wlEntry, not autoblocking\n");
 548                                 return true;
 549                         } else {
 550                                 wfDebug( " No match\n" );
 551                         }
 552                 }
 553
 554                 return false;
 555         }
 556
 557         /**
 558          * Autoblocks the given IP, referring to this Block.
 559          *
 560          * @param $autoblockIP String: the IP to autoblock.
 561          * @param $justInserted Boolean: the main block was just inserted
 562          * @return Boolean: whether or not an autoblock was inserted.
 563          */
 564         public function doAutoblock( $autoblockIP, $justInserted = false ) {
 565                 # If autoblocks are disabled, go away.
 566                 if ( !$this->mEnableAutoblock ) {
 567                         return;
 568                 }
 569
 570                 # Check for presence on the autoblock whitelist
 571                 if (Block::isWhitelistedFromAutoblocks($autoblockIP)) {
 572                         return;
 573                 }
 574
 575                 ## Allow hooks to cancel the autoblock.
 576                 if (!wfRunHooks( 'AbortAutoblock', array( $autoblockIP, &$this ) )) {
 577                         wfDebug( "Autoblock aborted by hook.\n" );
 578                         return false;
 579                 }
 580
 581                 # It's okay to autoblock. Go ahead and create/insert the block.
 582
 583                 $ipblock = Block::newFromDB( $autoblockIP );
 584                 if ( $ipblock ) {
 585                         # If the user is already blocked. Then check if the autoblock would
 586                         # exceed the user block. If it would exceed, then do nothing, else
 587                         # prolong block time
 588                         if ($this->mExpiry &&
 589                         ($this->mExpiry < Block::getAutoblockExpiry($ipblock->mTimestamp))) {
 590                                 return;
 591                         }
 592                         # Just update the timestamp
 593                         if ( !$justInserted ) {
 594                                 $ipblock->updateTimestamp();
 595                         }
 596                         return;
 597                 } else {
 598                         $ipblock = new Block;
 599                 }
 600
 601                 # Make a new block object with the desired properties
 602                 wfDebug( "Autoblocking {$this->mAddress}@" . $autoblockIP . "\n" );
 603                 $ipblock->mAddress = $autoblockIP;
 604                 $ipblock->mUser = 0;
 605                 $ipblock->mBy = $this->mBy;
 606                 $ipblock->mByName = $this->mByName;
 607                 $ipblock->mReason = wfMsgForContent( 'autoblocker', $this->mAddress, $this->mReason );
 608                 $ipblock->mTimestamp = wfTimestampNow();
 609                 $ipblock->mAuto = 1;
 610                 $ipblock->mCreateAccount = $this->mCreateAccount;
 611                 # Continue suppressing the name if needed
 612                 $ipblock->mHideName = $this->mHideName;
 613                 $ipblock->mAllowUsertalk = $this->mAllowUsertalk;
 614                 # If the user is already blocked with an expiry date, we don't
 615                 # want to pile on top of that!
 616                 if($this->mExpiry) {
 617                         $ipblock->mExpiry = min ( $this->mExpiry, Block::getAutoblockExpiry( $this->mTimestamp ));
 618                 } else {
 619                         $ipblock->mExpiry = Block::getAutoblockExpiry( $this->mTimestamp );
 620                 }
 621                 # Insert it
 622                 return $ipblock->insert();
 623         }
 624
 625         /**
 626          * Check if a block has expired. Delete it if it is.
 627          * @return Boolean
 628          */
 629         public function deleteIfExpired() {
 630                 $fname = 'Block::deleteIfExpired';
 631                 wfProfileIn( $fname );
 632                 if ( $this->isExpired() ) {
 633                         wfDebug( "Block::deleteIfExpired() -- deleting\n" );
 634                         $this->delete();
 635                         $retVal = true;
 636                 } else {
 637                         wfDebug( "Block::deleteIfExpired() -- not expired\n" );
 638                         $retVal = false;
 639                 }
 640                 wfProfileOut( $fname );
 641                 return $retVal;
 642         }
 643
 644         /**
 645          * Has the block expired?
 646          * @return Boolean
 647          */
 648         public function isExpired() {
 649                 wfDebug( "Block::isExpired() checking current " . wfTimestampNow() . " vs $this->mExpiry\n" );
 650                 if ( !$this->mExpiry ) {
 651                         return false;
 652                 } else {
 653                         return wfTimestampNow() > $this->mExpiry;
 654                 }
 655         }
 656
 657         /**
 658          * Is the block address valid (i.e. not a null string?)
 659          * @return Boolean
 660          */
 661         public function isValid() {
 662                 return $this->mAddress != '';
 663         }
 664
 665         /**
 666          * Update the timestamp on autoblocks.
 667          */
 668         public function updateTimestamp() {
 669                 if ( $this->mAuto ) {
 670                         $this->mTimestamp = wfTimestamp();
 671                         $this->mExpiry = Block::getAutoblockExpiry( $this->mTimestamp );
 672
 673                         $dbw = wfGetDB( DB_MASTER );
 674                         $dbw->update( 'ipblocks',
 675                                 array( /* SET */
 676                                         'ipb_timestamp' => $dbw->timestamp($this->mTimestamp),
 677                                         'ipb_expiry' => $dbw->timestamp($this->mExpiry),
 678                                 ), array( /* WHERE */
 679                                         'ipb_address' => $this->mAddress
 680                                 ), 'Block::updateTimestamp'
 681                         );
 682                 }
 683         }
 684
 685         /**
 686          * Get the user id of the blocking sysop
 687          *
 688          * @return Integer
 689          */
 690         public function getBy() {
 691                 return $this->mBy;
 692         }
 693
 694         /**
 695          * Get the username of the blocking sysop
 696          *
 697          * @return String
 698          */
 699         public function getByName() {
 700                 return $this->mByName;
 701         }
 702
 703         /**
 704          * Get/set the SELECT ... FOR UPDATE flag
 705          */
 706         public function forUpdate( $x = NULL ) {
 707                 return wfSetVar( $this->mForUpdate, $x );
 708         }
 709
 710         /**
 711          * Get/set a flag determining whether the master is used for reads
 712          */
 713         public function fromMaster( $x = NULL ) {
 714                 return wfSetVar( $this->mFromMaster, $x );
 715         }
 716
 717         /**
 718          * Get the block name, but with autoblocked IPs hidden as per standard privacy policy
 719          * @return String
 720          */
 721         public function getRedactedName() {
 722                 if ( $this->mAuto ) {
 723                         return '#' . $this->mId;
 724                 } else {
 725                         return $this->mAddress;
 726                 }
 727         }
 728
 729         /**
 730          * Encode expiry for DB
 731          *
 732          * @param $expiry String: timestamp for expiry, or
 733          * @param $db Database object
 734          * @return String
 735          */
 736         public static function encodeExpiry( $expiry, $db ) {
 737                 if ( $expiry == '' || $expiry == Block::infinity() ) {
 738                         return Block::infinity();
 739                 } else {
 740                         return $db->timestamp( $expiry );
 741                 }
 742         }
 743
 744         /**
 745          * Decode expiry which has come from the DB
 746          *
 747          * @param $expiry String: Database expiry format
 748          * @param $timestampType Requested timestamp format
 749          * @return String
 750          */
 751         public static function decodeExpiry( $expiry, $timestampType = TS_MW ) {
 752                 if ( $expiry == '' || $expiry == Block::infinity() ) {
 753                         return Block::infinity();
 754                 } else {
 755                         return wfTimestamp( $timestampType, $expiry );
 756                 }
 757         }
 758
 759         /**
 760          * Get a timestamp of the expiry for autoblocks
 761          *
 762          * @return String
 763          */
 764         public static function getAutoblockExpiry( $timestamp ) {
 765                 global $wgAutoblockExpiry;
 766                 return wfTimestamp( TS_MW, wfTimestamp( TS_UNIX, $timestamp ) + $wgAutoblockExpiry );
 767         }
 768
 769         /**
 770          * Gets rid of uneeded numbers in quad-dotted/octet IP strings
 771          * For example, 127.111.113.151/24 -> 127.111.113.0/24
 772          * @param $range String: IP address to normalize
 773          * @return string
 774          */
 775         public static function normaliseRange( $range ) {
 776                 $parts = explode( '/', $range );
 777                 if ( count( $parts ) == 2 ) {
 778                         // IPv6
 779                         if ( IP::isIPv6($range) && $parts[1] >= 64 && $parts[1] <= 128 ) {
 780                                 $bits = $parts[1];
 781                                 $ipint = IP::toUnsigned6( $parts[0] );
 782                                 # Native 32 bit functions WONT work here!!!
 783                                 # Convert to a padded binary number
 784                                 $network = wfBaseConvert( $ipint, 10, 2, 128 );
 785                                 # Truncate the last (128-$bits) bits and replace them with zeros
 786                                 $network = str_pad( substr( $network, 0, $bits ), 128, 0, STR_PAD_RIGHT );
 787                                 # Convert back to an integer
 788                                 $network = wfBaseConvert( $network, 2, 10 );
 789                                 # Reform octet address
 790                                 $newip = IP::toOctet( $network );
 791                                 $range = "$newip/{$parts[1]}";
 792                         } // IPv4
 793                         else if ( IP::isIPv4($range) && $parts[1] >= 16 && $parts[1] <= 32 ) {
 794                                 $shift = 32 - $parts[1];
 795                                 $ipint = IP::toUnsigned( $parts[0] );
 796                                 $ipint = $ipint >> $shift << $shift;
 797                                 $newip = long2ip( $ipint );
 798                                 $range = "$newip/{$parts[1]}";
 799                         }
 800                 }
 801                 return $range;
 802         }
 803
 804         /**
 805          * Purge expired blocks from the ipblocks table
 806          */
 807         public static function purgeExpired() {
 808                 $dbw = wfGetDB( DB_MASTER );
 809                 $dbw->delete( 'ipblocks', array( 'ipb_expiry < ' . $dbw->addQuotes( $dbw->timestamp() ) ), __METHOD__ );
 810         }
 811
 812         /**
 813          * Get a value to insert into expiry field of the database when infinite expiry
 814          * is desired. In principle this could be DBMS-dependant, but currently all
 815          * supported DBMS's support the string "infinity", so we just use that.
 816          *
 817          * @return String
 818          */
 819         public static function infinity() {
 820                 # This is a special keyword for timestamps in PostgreSQL, and
 821                 # works with CHAR(14) as well because "i" sorts after all numbers.
 822                 return 'infinity';
 823         }
 824
 825         /**
 826          * Convert a DB-encoded expiry into a real string that humans can read.
 827          *
 828          * @param $encoded_expiry String: Database encoded expiry time
 829          * @return Html-escaped String
 830          */
 831         public static function formatExpiry( $encoded_expiry ) {
 832                 static $msg = null;
 833
 834                 if( is_null( $msg ) ) {
 835                         $msg = array();
 836                         $keys = array( 'infiniteblock', 'expiringblock' );
 837                         foreach( $keys as $key ) {
 838                                 $msg[$key] = wfMsgHtml( $key );
 839                         }
 840                 }
 841
 842                 $expiry = Block::decodeExpiry( $encoded_expiry );
 843                 if ($expiry == 'infinity') {
 844                         $expirystr = $msg['infiniteblock'];
 845                 } else {
 846                         global $wgLang;
 847                         $expiredatestr = htmlspecialchars($wgLang->date( $expiry, true ));
 848                         $expiretimestr = htmlspecialchars($wgLang->time( $expiry, true ));
 849                         $expirystr = wfMsgReplaceArgs( $msg['expiringblock'], array( $expiredatestr, $expiretimestr ) );
 850                 }
 851                 return $expirystr;
 852         }
 853
 854         /**
 855          * Convert a typed-in expiry time into something we can put into the database.
 856          * @param $expiry_input String: whatever was typed into the form
 857          * @return String: more database friendly
 858          */
 859         public static function parseExpiryInput( $expiry_input ) {
 860                 if ( $expiry_input == 'infinite' || $expiry_input == 'indefinite' ) {
 861                         $expiry = 'infinity';
 862                 } else {
 863                         $expiry = strtotime( $expiry_input );
 864                         if ($expiry < 0 || $expiry === false) {
 865                                 return false;
 866                         }
 867                 }
 868                 return $expiry;
 869         }
 870
 871 }