Sym2.3 custom data source.php

<?php

	require_once(TOOLKIT . '/class.datasource.php');

	Class datasourcetour_l_current_presentation_images extends SectionDatasource{

		public $dsParamROOTELEMENT = 'tour-l-current-presentation-images';
		public $dsParamORDER = 'asc';
		public $dsParamPAGINATERESULTS = 'yes';
		public $dsParamLIMIT = '1';
		public $dsParamSTARTPAGE = '1';
		public $dsParamREDIRECTONEMPTY = 'no';
		public $dsParamSORT = 'system:id';
		public $dsParamASSOCIATEDENTRYCOUNTS = 'no';

		public $dsParamFILTERS = array(
			'279' => '{$tour:0}',
			'282' => 'en'
		);

		public function __construct($env=NULL, $process_params=true){
			parent::__construct($env, $process_params);
			$this->_dependencies = array('$ds-tour-l-current.system-id');
		}

		public function about(){
			return array(
				'name' => 'Tour (L) (current): Presentation images',
				'author' => array(
					'name' => 'David Oliver',
					'website' => '',
					'email' => ''),
				'version' => 'Symphony 2.3',
				'release-date' => '2013-03-04T18:56:58+00:00'
			);
		}

		public function getSource(){
			return '57';
		}

		public function allowEditorToParse(){
			return false;
		}

		public function execute(array &$param_pool) {

			$result = new XMLElement('tour-l-current-presentation-images');

			foreach(scandir(WORKSPACE . '/uploads/tours/presentations/by-tours-l/' . $param_pool['ds-tour-l-current.system-id'][0]) as $file) {
				if (preg_match('#\.png$#', $file)) {
					$result->appendChild(new XMLElement('image', $file));
				}
			}

			return $result;
		}

	}