*/
class WatchlistEditor {
/**
* Editing modes
*/
const EDIT_CLEAR = 1;
const EDIT_RAW = 2;
const EDIT_NORMAL = 3;
/**
* Main execution point
*
* @param $user User
* @param $output OutputPage
* @param $request WebRequest
* @param $mode int
*/
public function execute( $user, $output, $request, $mode ) {
global $wgUser;
if( wfReadOnly() ) {
$output->readOnlyPage();
return;
}
switch( $mode ) {
case self::EDIT_CLEAR:
// The "Clear" link scared people too much.
// Pass on to the raw editor, from which it's very easy to clear.
case self::EDIT_RAW:
$output->setPageTitle( wfMsg( 'watchlistedit-raw-title' ) );
if( $request->wasPosted() && $this->checkToken( $request, $wgUser ) ) {
$wanted = $this->extractTitles( $request->getText( 'titles' ) );
$current = $this->getWatchlist( $user );
if( count( $wanted ) > 0 ) {
$toWatch = array_diff( $wanted, $current );
$toUnwatch = array_diff( $current, $wanted );
$this->watchTitles( $toWatch, $user );
$this->unwatchTitles( $toUnwatch, $user );
$user->invalidateCache();
if( count( $toWatch ) > 0 || count( $toUnwatch ) > 0 )
$output->addHtml( wfMsgExt( 'watchlistedit-raw-done', 'parse' ) );
if( ( $count = count( $toWatch ) ) > 0 ) {
$output->addHtml( wfMsgExt( 'watchlistedit-raw-added', 'parse', $count ) );
$this->showTitles( $toWatch, $output, $wgUser->getSkin() );
}
if( ( $count = count( $toUnwatch ) ) > 0 ) {
$output->addHtml( wfMsgExt( 'watchlistedit-raw-removed', 'parse', $count ) );
$this->showTitles( $toUnwatch, $output, $wgUser->getSkin() );
}
} else {
$this->clearWatchlist( $user );
$user->invalidateCache();
$output->addHtml( wfMsgExt( 'watchlistedit-raw-removed', 'parse', count( $current ) ) );
$this->showTitles( $current, $output, $wgUser->getSkin() );
}
}
$this->showRawForm( $output, $user );
break;
case self::EDIT_NORMAL:
$output->setPageTitle( wfMsg( 'watchlistedit-normal-title' ) );
if( $request->wasPosted() && $this->checkToken( $request, $wgUser ) ) {
$titles = $this->extractTitles( $request->getArray( 'titles' ) );
$this->unwatchTitles( $titles, $user );
$user->invalidateCache();
$output->addHtml( wfMsgExt( 'watchlistedit-normal-done', 'parse',
$GLOBALS['wgLang']->formatNum( count( $titles ) ) ) );
$this->showTitles( $titles, $output, $wgUser->getSkin() );
}
$this->showNormalForm( $output, $user );
}
}
/**
* Check the edit token from a form submission
*
* @param $request WebRequest
* @param $user User
* @return bool
*/
private function checkToken( $request, $user ) {
return $user->matchEditToken( $request->getVal( 'token' ), 'watchlistedit' );
}
/**
* Extract a list of titles from a blob of text, returning
* (prefixed) strings; unwatchable titles are ignored
*
* @param $list mixed
* @return array
*/
private function extractTitles( $list ) {
$titles = array();
if( !is_array( $list ) ) {
$list = explode( "\n", trim( $list ) );
if( !is_array( $list ) )
return array();
}
foreach( $list as $text ) {
$text = trim( $text );
if( strlen( $text ) > 0 ) {
$title = Title::newFromText( $text );
if( $title instanceof Title && $title->isWatchable() )
$titles[] = $title->getPrefixedText();
}
}
return array_unique( $titles );
}
/**
* Print out a list of linked titles
*
* $titles can be an array of strings or Title objects; the former
* is preferred, since Titles are very memory-heavy
*
* @param $titles An array of strings, or Title objects
* @param $output OutputPage
* @param $skin Skin
*/
private function showTitles( $titles, $output, $skin ) {
$talk = wfMsgHtml( 'talkpagelinktext' );
// Do a batch existence check
$batch = new LinkBatch();
foreach( $titles as $title ) {
if( !$title instanceof Title )
$title = Title::newFromText( $title );
if( $title instanceof Title ) {
$batch->addObj( $title );
$batch->addObj( $title->getTalkPage() );
}
}
$batch->execute();
// Print out the list
$output->addHtml( "\n" );
foreach( $titles as $title ) {
if( !$title instanceof Title )
$title = Title::newFromText( $title );
if( $title instanceof Title ) {
$output->addHtml( "- " . $skin->makeLinkObj( $title )
. ' (' . $skin->makeLinkObj( $title->getTalkPage(), $talk ) . ")
\n" );
}
}
$output->addHtml( "
\n" );
}
/**
* Count the number of titles on a user's watchlist, excluding talk pages
*
* @param $user User
* @return int
*/
private function countWatchlist( $user ) {
$dbr = wfGetDB( DB_MASTER );
$res = $dbr->select( 'watchlist', 'COUNT(*) AS count', array( 'wl_user' => $user->getId() ), __METHOD__ );
$row = $dbr->fetchObject( $res );
return ceil( $row->count / 2 ); // Paranoia
}
/**
* Prepare a list of titles on a user's watchlist (excluding talk pages)
* and return an array of (prefixed) strings
*
* @param $user User
* @return array
*/
private function getWatchlist( $user ) {
$list = array();
$dbr = wfGetDB( DB_MASTER );
$res = $dbr->select(
'watchlist',
'*',
array(
'wl_user' => $user->getId(),
),
__METHOD__
);
if( $res->numRows() > 0 ) {
while( $row = $res->fetchObject() ) {
$title = Title::makeTitleSafe( $row->wl_namespace, $row->wl_title );
if( $title instanceof Title && !$title->isTalkPage() )
$list[] = $title->getPrefixedText();
}
$res->free();
}
return $list;
}
/**
* Get a list of titles on a user's watchlist, excluding talk pages,
* and return as a two-dimensional array with namespace, title and
* redirect status
*
* @param $user User
* @return array
*/
private function getWatchlistInfo( $user ) {
$titles = array();
$dbr = wfGetDB( DB_MASTER );
$uid = intval( $user->getId() );
list( $watchlist, $page ) = $dbr->tableNamesN( 'watchlist', 'page' );
$sql = "SELECT wl_namespace, wl_title, page_id, page_len, page_is_redirect
FROM {$watchlist} LEFT JOIN {$page} ON ( wl_namespace = page_namespace
AND wl_title = page_title ) WHERE wl_user = {$uid}";
$res = $dbr->query( $sql, __METHOD__ );
if( $res && $dbr->numRows( $res ) > 0 ) {
$cache = LinkCache::singleton();
while( $row = $dbr->fetchObject( $res ) ) {
$title = Title::makeTitleSafe( $row->wl_namespace, $row->wl_title );
if( $title instanceof Title ) {
// Update the link cache while we're at it
if( $row->page_id ) {
$cache->addGoodLinkObj( $row->page_id, $title, $row->page_len, $row->page_is_redirect );
} else {
$cache->addBadLinkObj( $title );
}
// Ignore non-talk
if( !$title->isTalkPage() )
$titles[$row->wl_namespace][$row->wl_title] = $row->page_is_redirect;
}
}
}
return $titles;
}
/**
* Show a message indicating the number of items on the user's watchlist,
* and return this count for additional checking
*
* @param $output OutputPage
* @param $user User
* @return int
*/
private function showItemCount( $output, $user ) {
if( ( $count = $this->countWatchlist( $user ) ) > 0 ) {
$output->addHtml( wfMsgExt( 'watchlistedit-numitems', 'parse',
$GLOBALS['wgLang']->formatNum( $count ) ) );
} else {
$output->addHtml( wfMsgExt( 'watchlistedit-noitems', 'parse' ) );
}
return $count;
}
/**
* Remove all titles from a user's watchlist
*
* @param $user User
*/
private function clearWatchlist( $user ) {
$dbw = wfGetDB( DB_MASTER );
$dbw->delete( 'watchlist', array( 'wl_user' => $user->getId() ), __METHOD__ );
}
/**
* Add a list of titles to a user's watchlist
*
* $titles can be an array of strings or Title objects; the former
* is preferred, since Titles are very memory-heavy
*
* @param $titles An array of strings, or Title objects
* @param $user User
*/
private function watchTitles( $titles, $user ) {
$dbw = wfGetDB( DB_MASTER );
$rows = array();
foreach( $titles as $title ) {
if( !$title instanceof Title )
$title = Title::newFromText( $title );
if( $title instanceof Title ) {
$rows[] = array(
'wl_user' => $user->getId(),
'wl_namespace' => ( $title->getNamespace() & ~1 ),
'wl_title' => $title->getDBkey(),
'wl_notificationtimestamp' => null,
);
$rows[] = array(
'wl_user' => $user->getId(),
'wl_namespace' => ( $title->getNamespace() | 1 ),
'wl_title' => $title->getDBkey(),
'wl_notificationtimestamp' => null,
);
}
}
$dbw->insert( 'watchlist', $rows, __METHOD__, 'IGNORE' );
}
/**
* Remove a list of titles from a user's watchlist
*
* $titles can be an array of strings or Title objects; the former
* is preferred, since Titles are very memory-heavy
*
* @param $titles An array of strings, or Title objects
* @param $user User
*/
private function unwatchTitles( $titles, $user ) {
$dbw = wfGetDB( DB_MASTER );
foreach( $titles as $title ) {
if( !$title instanceof Title )
$title = Title::newFromText( $title );
if( $title instanceof Title ) {
$dbw->delete(
'watchlist',
array(
'wl_user' => $user->getId(),
'wl_namespace' => ( $title->getNamespace() & ~1 ),
'wl_title' => $title->getDBkey(),
),
__METHOD__
);
$dbw->delete(
'watchlist',
array(
'wl_user' => $user->getId(),
'wl_namespace' => ( $title->getNamespace() | 1 ),
'wl_title' => $title->getDBkey(),
),
__METHOD__
);
}
}
}
/**
* Show the standard watchlist editing form
*
* @param $output OutputPage
* @param $user User
*/
private function showNormalForm( $output, $user ) {
global $wgUser;
if( ( $count = $this->showItemCount( $output, $user ) ) > 0 ) {
$self = SpecialPage::getTitleFor( 'Watchlist' );
$form = Xml::openElement( 'form', array( 'method' => 'post',
'action' => $self->getLocalUrl( 'action=edit' ) ) );
$form .= Xml::hidden( 'token', $wgUser->editToken( 'watchlistedit' ) );
$form .= '';
$output->addHtml( $form );
}
}
/**
* Get the correct "heading" for a namespace
*
* @param $namespace int
* @return string
*/
private function getNamespaceHeading( $namespace ) {
return $namespace == NS_MAIN
? wfMsgHtml( 'blanknamespace' )
: htmlspecialchars( $GLOBALS['wgContLang']->getFormattedNsText( $namespace ) );
}
/**
* Build a single list item containing a check box selecting a title
* and a link to that title, with various additional bits
*
* @param $title Title
* @param $redirect bool
* @param $skin Skin
* @return string
*/
private function buildRemoveLine( $title, $redirect, $skin ) {
$link = $skin->makeLinkObj( $title );
if( $redirect )
$link = '' . $link . '';
$tools[] = $skin->makeLinkObj( $title->getTalkPage(), wfMsgHtml( 'talkpagelinktext' ) );
if( $title->exists() ) {
$tools[] = $skin->makeKnownLinkObj( $title, wfMsgHtml( 'history_short' ), 'action=history' );
}
if( $title->getNamespace() == NS_USER && !$title->isSubpage() ) {
$tools[] = $skin->makeKnownLinkObj( SpecialPage::getTitleFor( 'Contributions', $title->getText() ), wfMsgHtml( 'contributions' ) );
}
return ''
. Xml::check( 'titles[]', false, array( 'value' => $title->getPrefixedText() ) )
. $link . ' (' . implode( ' | ', $tools ) . ')' . '';
}
/**
* Show a form for editing the watchlist in "raw" mode
*
* @param $output OutputPage
* @param $user User
*/
public function showRawForm( $output, $user ) {
global $wgUser;
$this->showItemCount( $output, $user );
$self = SpecialPage::getTitleFor( 'Watchlist' );
$form = Xml::openElement( 'form', array( 'method' => 'post',
'action' => $self->getLocalUrl( 'action=raw' ) ) );
$form .= Xml::hidden( 'token', $wgUser->editToken( 'watchlistedit' ) );
$form .= '';
$output->addHtml( $form );
}
/**
* Determine whether we are editing the watchlist, and if so, what
* kind of editing operation
*
* @param $request WebRequest
* @param $par mixed
* @return int
*/
public static function getMode( $request, $par ) {
$mode = strtolower( $request->getVal( 'action', $par ) );
switch( $mode ) {
case 'clear':
return self::EDIT_CLEAR;
case 'raw':
return self::EDIT_RAW;
case 'edit':
return self::EDIT_NORMAL;
default:
return false;
}
}
/**
* Build a set of links for convenient navigation
* between watchlist viewing and editing modes
*
* @param $skin Skin to use
* @return string
*/
public static function buildTools( $skin ) {
$tools = array();
$modes = array( 'view' => false, 'edit' => 'edit', 'raw' => 'raw' );
foreach( $modes as $mode => $subpage ) {
$tools[] = $skin->makeKnownLinkObj( SpecialPage::getTitleFor( 'Watchlist', $subpage ), wfMsgHtml( "watchlisttools-{$mode}" ) );
}
return implode( ' | ', $tools );
}
}