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<?php
/**
*
* @package MediaWiki
*/
/**
*
* @package MediaWiki
*/
class WatchedItem {
var $mTitle, $mUser;
/**
* Create a WatchedItem object with the given user and title
* @todo document
* @access private
*/
function &fromUserTitle( &$user, &$title ) {
$wl = new WatchedItem;
$wl->mUser =& $user;
$wl->mTitle =& $title;
$wl->id = $user->getId();
# Patch (also) for email notification on page changes T.Gries/M.Arndt 11.09.2004
# TG patch: here we do not consider pages and their talk pages equivalent - why should we ?
# The change results in talk-pages not automatically included in watchlists, when their parent page is included
# $wl->ns = $title->getNamespace() & ~1;
$wl->ns = $title->getNamespace();
$wl->ti = $title->getDBkey();
return $wl;
}
/**
* Returns the memcached key for this item
*/
function watchKey() {
global $wgDBname;
return "$wgDBname:watchlist:user:$this->id:page:$this->ns:$this->ti";
}
/**
* Is mTitle being watched by mUser?
*/
function isWatched() {
# Pages and their talk pages are considered equivalent for watching;
# remember that talk namespaces are numbered as page namespace+1.
global $wgMemc;
$fname = 'WatchedItem::isWatched';
$key = $this->watchKey();
$iswatched = $wgMemc->get( $key );
if( is_integer( $iswatched ) ) return $iswatched;
$dbr =& wfGetDB( DB_SLAVE );
$res = $dbr->select( 'watchlist', 1, array( 'wl_user' => $this->id, 'wl_namespace' => $this->ns,
'wl_title' => $this->ti ), $fname );
$iswatched = ($dbr->numRows( $res ) > 0) ? 1 : 0;
$wgMemc->set( $key, $iswatched );
return $iswatched;
}
/**
* @todo document
*/
function addWatch() {
$fname = 'WatchedItem::addWatch';
wfProfileIn( $fname );
// Use INSERT IGNORE to avoid overwriting the notification timestamp
// if there's already an entry for this page
$dbw =& wfGetDB( DB_MASTER );
$dbw->insert( 'watchlist',
array(
'wl_user' => $this->id,
'wl_namespace' => ($this->ns & ~1),
'wl_title' => $this->ti,
'wl_notificationtimestamp' => NULL
), $fname, 'IGNORE' );
// Every single watched page needs now to be listed in watchlist;
// namespace:page and namespace_talk:page need separate entries:
$dbw->insert( 'watchlist',
array(
'wl_user' => $this->id,
'wl_namespace' => ($this->ns | 1 ),
'wl_title' => $this->ti,
'wl_notificationtimestamp' => NULL
), $fname, 'IGNORE' );
global $wgMemc;
$wgMemc->set( $this->watchkey(), 1 );
wfProfileOut( $fname );
return true;
}
function removeWatch() {
global $wgMemc;
$fname = 'WatchedItem::removeWatch';
$success = false;
$dbw =& wfGetDB( DB_MASTER );
$dbw->delete( 'watchlist',
array(
'wl_user' => $this->id,
'wl_namespace' => ($this->ns & ~1),
'wl_title' => $this->ti
), $fname
);
if ( $dbw->affectedRows() ) {
$success = true;
}
# the following code compensates the new behaviour, introduced by the
# enotif patch, that every single watched page needs now to be listed
# in watchlist namespace:page and namespace_talk:page had separate
# entries: clear them
$dbw->delete( 'watchlist',
array(
'wl_user' => $this->id,
'wl_namespace' => ($this->ns | 1),
'wl_title' => $this->ti
), $fname
);
if ( $dbw->affectedRows() ) {
$success = true;
}
if ( $success ) {
$wgMemc->set( $this->watchkey(), 0 );
}
return $success;
}
/**
* Check if the given title already is watched by the user, and if so
* add watches on a new title. To be used for page renames and such.
*
* @param Title $ot Page title to duplicate entries from, if present
* @param Title $nt Page title to add watches on
* @static
*/
function duplicateEntries( $ot, $nt ) {
WatchedItem::doDuplicateEntries( $ot->getSubjectPage(), $nt->getSubjectPage() );
WatchedItem::doDuplicateEntries( $ot->getTalkPage(), $nt->getTalkPage() );
}
/**
* @static
* @access private
*/
function doDuplicateEntries( $ot, $nt ) {
$fname = "WatchedItem::duplicateEntries";
$oldnamespace = $ot->getNamespace();
$newnamespace = $nt->getNamespace();
$oldtitle = $ot->getDBkey();
$newtitle = $nt->getDBkey();
$dbw =& wfGetDB( DB_MASTER );
$res = $dbw->select( 'watchlist', 'wl_user',
array( 'wl_namespace' => $oldnamespace, 'wl_title' => $oldtitle ),
$fname, 'FOR UPDATE'
);
# Construct array to replace into the watchlist
$values = array();
while ( $s = $dbw->fetchObject( $res ) ) {
$values[] = array(
'wl_user' => $s->wl_user,
'wl_namespace' => $newnamespace,
'wl_title' => $newtitle
);
}
$dbw->freeResult( $res );
if( empty( $values ) ) {
// Nothing to do
return true;
}
# Perform replace
# Note that multi-row replace is very efficient for MySQL but may be inefficient for
# some other DBMSes, mostly due to poor simulation by us
$dbw->replace( 'watchlist', array(array( 'wl_user', 'wl_namespace', 'wl_title')), $values, $fname );
return true;
}
}
?>
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