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<?php
/**
* @file
* @ingroup Watchlist
*/
/**
* @ingroup Watchlist
*/
class WatchedItem {
var $mTitle, $mUser, $id, $ns, $ti;
/**
* Create a WatchedItem object with the given user and title
* @param $user User: the user to use for (un)watching
* @param $title Title: the title we're going to (un)watch
* @return WatchedItem object
*/
public static 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;
}
/**
* Is mTitle being watched by mUser?
* @return bool
*/
public function isWatched() {
# Pages and their talk pages are considered equivalent for watching;
# remember that talk namespaces are numbered as page namespace+1.
$dbr = wfGetDB( DB_SLAVE );
$res = $dbr->select( 'watchlist', 1, array( 'wl_user' => $this->id, 'wl_namespace' => $this->ns,
'wl_title' => $this->ti ), __METHOD__ );
$iswatched = ($dbr->numRows( $res ) > 0) ? 1 : 0;
return $iswatched;
}
/**
* Given a title and user (assumes the object is setup), add the watch to the
* database.
* @return bool (always true)
*/
public function addWatch() {
wfProfileIn( __METHOD__ );
// 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' => $this->id,
'wl_namespace' => MWNamespace::getSubject($this->ns),
'wl_title' => $this->ti,
'wl_notificationtimestamp' => null
), __METHOD__, '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' => $this->id,
'wl_namespace' => MWNamespace::getTalk($this->ns),
'wl_title' => $this->ti,
'wl_notificationtimestamp' => null
), __METHOD__, 'IGNORE' );
wfProfileOut( __METHOD__ );
return true;
}
/**
* Same as addWatch, only the opposite.
* @return bool
*/
public function removeWatch() {
wfProfileIn( __METHOD__ );
$success = false;
$dbw = wfGetDB( DB_MASTER );
$dbw->delete( 'watchlist',
array(
'wl_user' => $this->id,
'wl_namespace' => MWNamespace::getSubject($this->ns),
'wl_title' => $this->ti
), __METHOD__
);
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' => $this->id,
'wl_namespace' => MWNamespace::getTalk($this->ns),
'wl_title' => $this->ti
), __METHOD__
);
if ( $dbw->affectedRows() ) {
$success = true;
}
wfProfileOut( __METHOD__ );
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 $ot Title: page title to duplicate entries from, if present
* @param $nt Title: page title to add watches on
*/
public static function duplicateEntries( $ot, $nt ) {
WatchedItem::doDuplicateEntries( $ot->getSubjectPage(), $nt->getSubjectPage() );
WatchedItem::doDuplicateEntries( $ot->getTalkPage(), $nt->getTalkPage() );
}
/**
* Handle duplicate entries. Backend for duplicateEntries().
*
* @param $ot Title
* @param $nt Title
*
* @return bool
*/
private static function doDuplicateEntries( $ot, $nt ) {
$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 ),
__METHOD__, 'FOR UPDATE'
);
# Construct array to replace into the watchlist
$values = array();
foreach ( $res as $s ) {
$values[] = array(
'wl_user' => $s->wl_user,
'wl_namespace' => $newnamespace,
'wl_title' => $newtitle
);
}
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, __METHOD__ );
return true;
}
}
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