includes/UserRightsProxy.php

   1 <?php
   2 /**
   3  * Representation of an user on a other locally-hosted wiki.
   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
  23 /**
  24  * Cut-down copy of User interface for local-interwiki-database
  25  * user rights manipulation.
  26  */
  27 class UserRightsProxy {
  28
  29         /**
  30          * Constructor.
  31          *
  32          * @see newFromId()
  33          * @see newFromName()
  34          * @param DatabaseBase $db Db connection
  35          * @param string $database Database name
  36          * @param string $name User name
  37          * @param int $id User ID
  38          */
  39         private function __construct( $db, $database, $name, $id ) {
  40                 $this->db = $db;
  41                 $this->database = $database;
  42                 $this->name = $name;
  43                 $this->id = intval( $id );
  44                 $this->newOptions = array();
  45         }
  46
  47         /**
  48          * Accessor for $this->database
  49          *
  50          * @return string Database name
  51          */
  52         public function getDBName() {
  53                 return $this->database;
  54         }
  55
  56         /**
  57          * Confirm the selected database name is a valid local interwiki database name.
  58          *
  59          * @param string $database Database name
  60          * @return bool
  61          */
  62         public static function validDatabase( $database ) {
  63                 global $wgLocalDatabases;
  64                 return in_array( $database, $wgLocalDatabases );
  65         }
  66
  67         /**
  68          * Same as User::whoIs()
  69          *
  70          * @param string $database Database name
  71          * @param int $id User ID
  72          * @param bool $ignoreInvalidDB If true, don't check if $database is in $wgLocalDatabases
  73          * @return string User name or false if the user doesn't exist
  74          */
  75         public static function whoIs( $database, $id, $ignoreInvalidDB = false ) {
  76                 $user = self::newFromId( $database, $id, $ignoreInvalidDB );
  77                 if ( $user ) {
  78                         return $user->name;
  79                 } else {
  80                         return false;
  81                 }
  82         }
  83
  84         /**
  85          * Factory function; get a remote user entry by ID number.
  86          *
  87          * @param string $database Database name
  88          * @param int $id User ID
  89          * @param bool $ignoreInvalidDB If true, don't check if $database is in $wgLocalDatabases
  90          * @return UserRightsProxy|null If doesn't exist
  91          */
  92         public static function newFromId( $database, $id, $ignoreInvalidDB = false ) {
  93                 return self::newFromLookup( $database, 'user_id', intval( $id ), $ignoreInvalidDB );
  94         }
  95
  96         /**
  97          * Factory function; get a remote user entry by name.
  98          *
  99          * @param string $database Database name
 100          * @param string $name User name
 101          * @param bool $ignoreInvalidDB If true, don't check if $database is in $wgLocalDatabases
 102          * @return UserRightsProxy|null If doesn't exist
 103          */
 104         public static function newFromName( $database, $name, $ignoreInvalidDB = false ) {
 105                 return self::newFromLookup( $database, 'user_name', $name, $ignoreInvalidDB );
 106         }
 107
 108         /**
 109          * @param string $database
 110          * @param string $field
 111          * @param string $value
 112          * @param bool $ignoreInvalidDB
 113          * @return null|UserRightsProxy
 114          */
 115         private static function newFromLookup( $database, $field, $value, $ignoreInvalidDB = false ) {
 116                 global $wgSharedDB, $wgSharedTables;
 117                 // If the user table is shared, perform the user query on it, but don't pass it to the UserRightsProxy,
 118                 // as user rights are normally not shared.
 119                 if ( $wgSharedDB && in_array( 'user', $wgSharedTables ) ) {
 120                         $userdb = self::getDB( $wgSharedDB, $ignoreInvalidDB );
 121                 } else {
 122                         $userdb = self::getDB( $database, $ignoreInvalidDB );
 123                 }
 124
 125                 $db = self::getDB( $database, $ignoreInvalidDB );
 126
 127                 if ( $db && $userdb ) {
 128                         $row = $userdb->selectRow( 'user',
 129                                 array( 'user_id', 'user_name' ),
 130                                 array( $field => $value ),
 131                                 __METHOD__ );
 132
 133                         if ( $row !== false ) {
 134                                 return new UserRightsProxy( $db, $database,
 135                                         $row->user_name,
 136                                         intval( $row->user_id ) );
 137                         }
 138                 }
 139                 return null;
 140         }
 141
 142         /**
 143          * Open a database connection to work on for the requested user.
 144          * This may be a new connection to another database for remote users.
 145          *
 146          * @param string $database
 147          * @param bool $ignoreInvalidDB If true, don't check if $database is in $wgLocalDatabases
 148          * @return DatabaseBase|null If invalid selection
 149          */
 150         public static function getDB( $database, $ignoreInvalidDB = false ) {
 151                 global $wgDBname;
 152                 if ( $ignoreInvalidDB || self::validDatabase( $database ) ) {
 153                         if ( $database == $wgDBname ) {
 154                                 // Hmm... this shouldn't happen though. :)
 155                                 return wfGetDB( DB_MASTER );
 156                         } else {
 157                                 return wfGetDB( DB_MASTER, array(), $database );
 158                         }
 159                 }
 160                 return null;
 161         }
 162
 163         /**
 164          * @return int
 165          */
 166         public function getId() {
 167                 return $this->id;
 168         }
 169
 170         /**
 171          * @return bool
 172          */
 173         public function isAnon() {
 174                 return $this->getId() == 0;
 175         }
 176
 177         /**
 178          * Same as User::getName()
 179          *
 180          * @return string
 181          */
 182         public function getName() {
 183                 return $this->name . '@' . $this->database;
 184         }
 185
 186         /**
 187          * Same as User::getUserPage()
 188          *
 189          * @return Title
 190          */
 191         public function getUserPage() {
 192                 return Title::makeTitle( NS_USER, $this->getName() );
 193         }
 194
 195         /**
 196          * Replaces User::getUserGroups()
 197          * @return array
 198          */
 199         function getGroups() {
 200                 $res = $this->db->select( 'user_groups',
 201                         array( 'ug_group' ),
 202                         array( 'ug_user' => $this->id ),
 203                         __METHOD__ );
 204                 $groups = array();
 205                 foreach ( $res as $row ) {
 206                         $groups[] = $row->ug_group;
 207                 }
 208                 return $groups;
 209         }
 210
 211         /**
 212          * Replaces User::addUserGroup()
 213          * @param string $group
 214          *
 215          * @return bool
 216          */
 217         function addGroup( $group ) {
 218                 $this->db->insert( 'user_groups',
 219                         array(
 220                                 'ug_user' => $this->id,
 221                                 'ug_group' => $group,
 222                         ),
 223                         __METHOD__,
 224                         array( 'IGNORE' ) );
 225
 226                 return true;
 227         }
 228
 229         /**
 230          * Replaces User::removeUserGroup()
 231          * @param string $group
 232          *
 233          * @return bool
 234          */
 235         function removeGroup( $group ) {
 236                 $this->db->delete( 'user_groups',
 237                         array(
 238                                 'ug_user' => $this->id,
 239                                 'ug_group' => $group,
 240                         ),
 241                         __METHOD__ );
 242
 243                 return true;
 244         }
 245
 246         /**
 247          * Replaces User::setOption()
 248          * @param string $option
 249          * @param mixed $value
 250          */
 251         public function setOption( $option, $value ) {
 252                 $this->newOptions[$option] = $value;
 253         }
 254
 255         public function saveSettings() {
 256                 $rows = array();
 257                 foreach ( $this->newOptions as $option => $value ) {
 258                         $rows[] = array(
 259                                 'up_user' => $this->id,
 260                                 'up_property' => $option,
 261                                 'up_value' => $value,
 262                         );
 263                 }
 264                 $this->db->replace( 'user_properties',
 265                         array( array( 'up_user', 'up_property' ) ),
 266                         $rows, __METHOD__
 267                 );
 268                 $this->invalidateCache();
 269         }
 270
 271         /**
 272          * Replaces User::touchUser()
 273          */
 274         function invalidateCache() {
 275                 $this->db->update( 'user',
 276                         array( 'user_touched' => $this->db->timestamp() ),
 277                         array( 'user_id' => $this->id ),
 278                         __METHOD__ );
 279
 280                 global $wgMemc;
 281                 $key = wfForeignMemcKey( $this->database, false, 'user', 'id', $this->id );
 282                 $wgMemc->delete( $key );
 283         }
 284 }