<?php
/**
 * eGroupWare
 *
 * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
 * @package calendar
 * @subpackage importexport
 * @link http://www.egroupware.org
 * @author Nathan Gray
 * @copyright Nathan Gray
 * @version $Id$
 */


/**
 * import ical for calendar
 */
class calendar_import_ical implements importexport_iface_import_plugin  {

	private static $plugin_options = array(
		'fieldsep', 		// char
		'charset',		// string
		'owner', 		// int
		'update_cats', 			// string {override|add} overides record
								// with cat(s) from csv OR add the cat from
								// csv file to exeisting cat(s) of record
		'num_header_lines', // int number of header lines
		'field_conversion', // array( $csv_col_num => conversion)
		'field_mapping',	// array( $csv_col_num => adb_filed)
		'conditions',		/* => array containing condition arrays:
				'type' => exists, // exists
				'string' => '#kundennummer',
				'true' => array(
					'action' => update,
					'last' => true,
				),
				'false' => array(
					'action' => insert,
					'last' => true,
				),*/

	);

	/**
	 * actions wich could be done to data entries
	 */
	protected static $actions = array();

	/**
	 * conditions for actions
	 *
	 * @var array
	 */
	protected static $conditions = array();

	/**
	 * @var definition
	 */
	private $definition;

	/**
	 * @var bo
	 */
	private $bo;

	/**
	* For figuring out if an entry has changed
	*/
	protected $tracking;

	/**
	 * @var bool
	 */
	private $dry_run = false;

	/**
	 * @var bool is current user admin?
	 */
	private $is_admin = false;

	/**
	 * @var int
	 */
	private $user = null;

	/**
	 * List of import errors
	 */
	protected $errors = array();

	/**
         * List of actions, and how many times that action was taken
         */
        protected $results = array();

	/**
	 * imports entries according to given definition object.
	 * @param resource $_stream
	 * @param string $_charset
	 * @param definition $_definition
	 */
	public function import( $_stream, importexport_definition $_definition ) {

		$this->definition = $_definition;

		// user, is admin ?
		$this->user = $GLOBALS['egw_info']['user']['account_id'];

		// dry run?
		$this->dry_run = isset( $_definition->plugin_options['dry_run'] ) ? $_definition->plugin_options['dry_run'] :  false;

		// fetch the addressbook bo
		$this->bo= new calendar_boupdate();


		// Failures
		$this->errors = array();

		@set_time_limit(0);     // try switching execution time limit off

		$calendar_ical = new calendar_ical;
		$calendar_ical->setSupportedFields('file', '');
		if (!$calendar_ical->importVCal(stream_get_contents($_stream)))
		{
			$this->errors[] = lang('Error: importing the iCal');
		}
		else
		{
			$this->results['imported'] = $calendar_ical->events_imported;
		}

		return $calendar_ical->events_imported;
	}

	
	/**
	 * returns translated name of plugin
	 *
	 * @return string name
	 */
	public static function get_name() {
		return lang('Calendar iCal import');
	}

	/**
	 * returns translated (user) description of plugin
	 *
	 * @return string descriprion
	 */
	public static function get_description() {
		return lang("Imports events into your Calendar from an iCal File.");
	}

	/**
	 * retruns file suffix(s) plugin can handle (e.g. csv)
	 *
	 * @return string suffix (comma seperated)
	 */
	public static function get_filesuffix() {
		return 'ics';
	}

	/**
	 * return etemplate components for options.
	 * @abstract We can't deal with etemplate objects here, as an uietemplate
	 * objects itself are scipt orientated and not "dialog objects"
	 *
	 * @return array (
	 * 		name 		=> string,
	 * 		content		=> array,
	 * 		sel_options => array,
	 * 		preserv		=> array,
	 * )
	 */
	public function get_options_etpl() {
		// lets do it!
	}

	/**
	 * returns etemplate name for slectors of this plugin
	 *
	 * @return string etemplate name
	 */
	public function get_selectors_etpl() {
		// lets do it!
	}

	/**
        * Returns errors that were encountered during importing
        * Maximum of one error message per record, but you can append if you need to
        *
        * @return Array (
        *       record_# => error message
        *       )
        */
        public function get_errors() {
		return $this->errors;
	}

	/**
        * Returns a list of actions taken, and the number of records for that action.
        * Actions are things like 'insert', 'update', 'delete', and may be different for each plugin.
        *
        * @return Array (
        *       action => record count
        * )
        */
        public function get_results() {
                return $this->results;
        }
} // end of iface_export_plugin
?>