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                 $db = self::getDB( $database, $ignoreInvalidDB );
 117                 if ( $db ) {
 118                         $row = $db->selectRow( 'user',
 119                                 array( 'user_id', 'user_name' ),
 120                                 array( $field => $value ),
 121                                 __METHOD__ );
 122                         if ( $row !== false ) {
 123                                 return new UserRightsProxy( $db, $database,
 124                                         $row->user_name,
 125                                         intval( $row->user_id ) );
 126                         }
 127                 }
 128                 return null;
 129         }
 130
 131         /**
 132          * Open a database connection to work on for the requested user.
 133          * This may be a new connection to another database for remote users.
 134          *
 135          * @param string $database
 136          * @param bool $ignoreInvalidDB If true, don't check if $database is in $wgLocalDatabases
 137          * @return DatabaseBase|null If invalid selection
 138          */
 139         public static function getDB( $database, $ignoreInvalidDB = false ) {
 140                 global $wgDBname;
 141                 if ( $ignoreInvalidDB || self::validDatabase( $database ) ) {
 142                         if ( $database == $wgDBname ) {
 143                                 // Hmm... this shouldn't happen though. :)
 144                                 return wfGetDB( DB_MASTER );
 145                         } else {
 146                                 return wfGetDB( DB_MASTER, array(), $database );
 147                         }
 148                 }
 149                 return null;
 150         }
 151
 152         /**
 153          * @return int
 154          */
 155         public function getId() {
 156                 return $this->id;
 157         }
 158
 159         /**
 160          * @return bool
 161          */
 162         public function isAnon() {
 163                 return $this->getId() == 0;
 164         }
 165
 166         /**
 167          * Same as User::getName()
 168          *
 169          * @return string
 170          */
 171         public function getName() {
 172                 return $this->name . '@' . $this->database;
 173         }
 174
 175         /**
 176          * Same as User::getUserPage()
 177          *
 178          * @return Title
 179          */
 180         public function getUserPage() {
 181                 return Title::makeTitle( NS_USER, $this->getName() );
 182         }
 183
 184         /**
 185          * Replaces User::getUserGroups()
 186          * @return array
 187          */
 188         function getGroups() {
 189                 $res = $this->db->select( 'user_groups',
 190                         array( 'ug_group' ),
 191                         array( 'ug_user' => $this->id ),
 192                         __METHOD__ );
 193                 $groups = array();
 194                 foreach ( $res as $row ) {
 195                         $groups[] = $row->ug_group;
 196                 }
 197                 return $groups;
 198         }
 199
 200         /**
 201          * Replaces User::addUserGroup()
 202          * @param string $group
 203          */
 204         function addGroup( $group ) {
 205                 $this->db->insert( 'user_groups',
 206                         array(
 207                                 'ug_user' => $this->id,
 208                                 'ug_group' => $group,
 209                         ),
 210                         __METHOD__,
 211                         array( 'IGNORE' ) );
 212         }
 213
 214         /**
 215          * Replaces User::removeUserGroup()
 216          * @param string $group
 217          */
 218         function removeGroup( $group ) {
 219                 $this->db->delete( 'user_groups',
 220                         array(
 221                                 'ug_user' => $this->id,
 222                                 'ug_group' => $group,
 223                         ),
 224                         __METHOD__ );
 225         }
 226
 227         /**
 228          * Replaces User::setOption()
 229          * @param string $option
 230          * @param mixed $value
 231          */
 232         public function setOption( $option, $value ) {
 233                 $this->newOptions[$option] = $value;
 234         }
 235
 236         public function saveSettings() {
 237                 $rows = array();
 238                 foreach ( $this->newOptions as $option => $value ) {
 239                         $rows[] = array(
 240                                 'up_user' => $this->id,
 241                                 'up_property' => $option,
 242                                 'up_value' => $value,
 243                         );
 244                 }
 245                 $this->db->replace( 'user_properties',
 246                         array( array( 'up_user', 'up_property' ) ),
 247                         $rows, __METHOD__
 248                 );
 249                 $this->invalidateCache();
 250         }
 251
 252         /**
 253          * Replaces User::touchUser()
 254          */
 255         function invalidateCache() {
 256                 $this->db->update( 'user',
 257                         array( 'user_touched' => $this->db->timestamp() ),
 258                         array( 'user_id' => $this->id ),
 259                         __METHOD__ );
 260
 261                 global $wgMemc;
 262                 $key = wfForeignMemcKey( $this->database, false, 'user', 'id', $this->id );
 263                 $wgMemc->delete( $key );
 264         }
 265 }