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<?php
/**
* Performs the watch and unwatch actions on a page
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*
* @file
* @ingroup Actions
*/
class WatchAction extends FormAction {
public function getName() {
return 'watch';
}
public function requiresUnblock() {
return false;
}
protected function getDescription() {
return wfMsgHtml( 'addwatch' );
}
/**
* Just get an empty form with a single submit button
* @return array
*/
protected function getFormFields() {
return array();
}
public function onSubmit( $data ) {
wfProfileIn( __METHOD__ );
self::doWatch( $this->getTitle(), $this->getUser() );
wfProfileOut( __METHOD__ );
return true;
}
/**
* This can be either formed or formless depending on the session token given
*/
public function show() {
$this->setHeaders();
$user = $this->getUser();
// This will throw exceptions if there's a problem
$this->checkCanExecute( $user );
// Must have valid token for this action/title
$salt = array( $this->getName(), $this->getTitle()->getDBkey() );
if ( $user->matchEditToken( $this->getRequest()->getVal( 'token' ), $salt ) ) {
$this->onSubmit( array() );
$this->onSuccess();
} else {
$form = $this->getForm();
if ( $form->show() ) {
$this->onSuccess();
}
}
}
protected function checkCanExecute( User $user ) {
// Must be logged in
if ( $user->isAnon() ) {
throw new ErrorPageError( 'watchnologin', 'watchnologintext' );
}
return parent::checkCanExecute( $user );
}
public static function doWatch( Title $title, User $user ) {
$page = WikiPage::factory( $title );
if ( wfRunHooks( 'WatchArticle', array( &$user, &$page ) ) ) {
$user->addWatch( $title );
wfRunHooks( 'WatchArticleComplete', array( &$user, &$page ) );
}
return true;
}
public static function doUnwatch( Title $title, User $user ) {
$page = WikiPage::factory( $title );
if ( wfRunHooks( 'UnwatchArticle', array( &$user, &$page ) ) ) {
$user->removeWatch( $title );
wfRunHooks( 'UnwatchArticleComplete', array( &$user, &$page ) );
}
return true;
}
/**
* Get token to watch (or unwatch) a page for a user
*
* @param Title $title Title object of page to watch
* @param User $user User for whom the action is going to be performed
* @param string $action Optionally override the action to 'unwatch'
* @return string Token
* @since 1.18
*/
public static function getWatchToken( Title $title, User $user, $action = 'watch' ) {
if ( $action != 'unwatch' ) {
$action = 'watch';
}
$salt = array( $action, $title->getDBkey() );
// This token stronger salted and not compatible with ApiWatch
// It's title/action specific because index.php is GET and API is POST
return $user->getEditToken( $salt );
}
/**
* Get token to unwatch (or watch) a page for a user
*
* @param Title $title Title object of page to unwatch
* @param User $user User for whom the action is going to be performed
* @param string $action Optionally override the action to 'watch'
* @return string Token
* @since 1.18
*/
public static function getUnwatchToken( Title $title, User $user, $action = 'unwatch' ) {
return self::getWatchToken( $title, $user, $action );
}
protected function alterForm( HTMLForm $form ) {
$form->setSubmitText( wfMsg( 'confirm-watch-button' ) );
}
protected function preText() {
return wfMessage( 'confirm-watch-top' )->parse();
}
public function onSuccess() {
$this->getOutput()->addWikiMsg( 'addedwatchtext', $this->getTitle()->getPrefixedText() );
}
}
class UnwatchAction extends WatchAction {
public function getName() {
return 'unwatch';
}
protected function getDescription() {
return wfMsg( 'removewatch' );
}
public function onSubmit( $data ) {
wfProfileIn( __METHOD__ );
self::doUnwatch( $this->getTitle(), $this->getUser() );
wfProfileOut( __METHOD__ );
return true;
}
protected function alterForm( HTMLForm $form ) {
$form->setSubmitText( wfMsg( 'confirm-unwatch-button' ) );
}
protected function preText() {
return wfMessage( 'confirm-unwatch-top' )->parse();
}
public function onSuccess() {
$this->getOutput()->addWikiMsg( 'removedwatchtext', $this->getTitle()->getPrefixedText() );
}
}
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