*/
class action_plugin_preview extends \dokuwiki\Extension\ActionPlugin
{
/** @inheritDoc */
public function register(Doku_Event_Handler $controller)
{
$controller->register_hook('DOKUWIKI_STARTED', 'BEFORE', $this, 'handleConfig');
$controller->register_hook('AJAX_CALL_UNKNOWN', 'BEFORE', $this, 'handlePreview');
}
/**
* Event handler for DOKUWIKI_STARTED
*
* @see https://www.dokuwiki.org/devel:events:DOKUWIKI_STARTED
* @param Doku_Event $event Event object
* @param mixed $param optional parameter passed when event was registered
* @return void
*/
public function handleConfig(Doku_Event $event, $param) {
global $JSINFO;
$JSINFO['plugin']['preview'] = [
'selector' => $this->getConf('selector'),
];
}
/**
* Event handler for AJAX_CALL_UNKNOWN
*
* @see https://www.dokuwiki.org/devel:events:AJAX_CALL_UNKNOWN
* @param Doku_Event $event Event object
* @param mixed $param optional parameter passed when event was registered
* @return void
*/
public function handlePreview(Doku_Event $event, $param)
{
if ($event->data != 'plugin_preview') return;
$event->preventDefault();
$event->stopPropagation();
global $INPUT;
$id = $INPUT->str('id');
if (!$id) http_status(404, 'No ID given');
if (!page_exists($id)) http_status(404, 'Page does not exist');
if (!auth_quickaclcheck($id) >= AUTH_READ) http_status(403, 'Access denied');
$title = trim(p_get_first_heading($id));
if ($title == '') http_status(404, 'Page has no title, probably not important');
$abstract = p_get_metadata($id, 'description abstract');
$image = p_get_metadata($id, 'relation firstimage');
$abstract = substr($abstract, strlen($title)); // remove title from abstract
$abstract = trim($abstract, '.…') . '…'; // always have ellipsis
header('Content-Type: text/html; charset=utf-8');
echo '' . hsc($title) . '
';
echo '' . hsc($abstract) . '
';
if ($image) echo ' . ')
';
}
}