public function shareAction()
{
$request = $this->getRequest();
$post_id = $request->getParam('post_id');
$user_id = get_user_id();
$share_mapper = new Application_Model_ShareMapper();
$is_shared = $share_mapper->share($user_id, $post_id);
if ($is_shared) {
$notification_mapper = new Application_Model_NotificationMapper();
$notification_model = new Application_Model_Notification();
$post_mapper = new Application_Model_PostMapper();
$post = $post_mapper->find($post_id);
$notification_model->_fields['user_id'] = $post['user_id'];
$notification_model->_fields['is_seen'] = 0;
$notification_model->_fields['content'] = get_username() . " Likes your post with id = {$post_id}";
$notification_mapper->save($notification_model);
}
$this->_redirect('/post/home');
}