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<?php
/**
* Elgg river.
* Functions for listening for and generating the river out of the system log.
*
* @package Elgg
* @subpackage Core
* @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU Public License version 2
* @author Marcus Povey
* @copyright Curverider Ltd 2008
* @link http://elgg.org/
*/
/**
* Extract a list of river events from the current system log.
* This function retrieves the objects from the system log and will attempt to render
* the view "river/CLASSNAME/EVENT" where CLASSNAME is the class of the object the system event is referring to,
* and EVENT is the event (create, update, delete etc).
*
* This view will be passed the log entry (as 'log_entry') and the object (as 'object') which will be accessable
* through the $vars[] array.
*
* It returns an array of the result of each of these views.
*
* \TODO: Limit to just one user or just one user's friends
*
* @param int $limit
* @param int $offset
* @return array
*/
function get_river_entries($limit = 10, $offset = 0)
{
// set start limit and offset
$cnt = $limit;
$off = $offset;
$exit = false;
// River objects
$river = array();
do
{
$log_events = get_system_log("","", $cnt, $off);
if (!$log_events)
$exit = true;
else
{
foreach ($log_events as $log)
{
// See if we have access to the object we're talking about
$event = $log->event;
$class = $log->object_class;
$tmp = new $class();
$object = $tmp->getObjectFromID($log->object_id);
// Exists and we have access to it
if (is_a($object, $class))
{
// See if anything can handle it
$tam = "";
// test if view exist and if so
$tam = elgg_view("river/$class/$event", array(
'performed_by' => get_entity($log->performed_by_guid),
'log_entry' => $log,
'object' => $object
));
if ($tam)
{
$river[] = $tam;
$cnt--;
}
}
// Increase offset
$off++;
}
}
} while (
($cnt > 0) &&
(!$exit)
);
return $river;
}
?>
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