<?php
/**
 * eGroupWare
 *
 * Plugin to import events from a CSV file
 *
 * @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 $Id$
 */


/**
 * class import_csv for calendar
 */
class calendar_import_csv extends importexport_basic_import_csv  {

	/**
	 * actions wich could be done to data entries
	 */
	protected static $actions = array( 'none', 'update', 'insert' );

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

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

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

	/**
	 * Set up tracker
	 */
	protected function init(importexport_definition &$definition)
	{
		// fetch the addressbook bo
		$this->bo= new calendar_boupdate();

		// Get the tracker for changes
		$this->tracking = new calendar_tracking();

		// Used for participants
		$this->status_map = array_flip(array_map('lang',$this->bo->verbose_status));
		$this->role_map = array_flip($this->bo->roles);

		$this->lookups = array(
			'priority'	=> Array(
				0 => lang('None'),
				1 => lang('Low'),
				2 => lang('Normal'),
				3 => lang('High')
	 		),
			'recurrence' => $this->bo->recur_types
		);
	}

	/**
	 * imports a single entry according to given definition object.
	 * Handles the conditions and the actions taken.
	 *
	 * @param importepport_iface_egw_record record The egw_record object being imported
	 * @param importexport_iface_import_record import_csv Import object contains current state
	 *
	 * @return boolean success
	 */
	public function import_record(\importexport_iface_egw_record &$record, &$import_csv)
	{
		// set eventOwner
		$options =& $this->definition->plugin_options;
		$options['owner'] = $options['owner'] ? $options['owner'] : $this->user;

		// Set owner, unless it's supposed to come from CSV file
		if($options['owner_from_csv']) {
			if(!is_numeric($record['owner'])) {
				$this->errors[$import_csv->get_current_position()] = lang(
					'Invalid owner ID: %1.  Might be a bad field translation.  Used %2 instead.',
					$record->owner,
					$options['owner']
				);
				$record->owner = $options['owner'];
			}
		}
		else
		{
			$record->owner = $options['owner'];
		}

		if ($record->participants && !is_array($record->participants)) {
			// Importing participants in human friendly format:
			// Name (quantity)? (status) Role[, Name (quantity)? (status) Role]+
			preg_match_all('/(([^(]+?)(?: \(([\d]+)\))? \(([^,)]+)\)(?: ([^ ,]+))?)(?:, )?/',$record->participants,$participants);
			$p_participants = array();
			$missing = array();
			list($lines, $p, $names, $quantity, $status, $role) = $participants;
			foreach($names as $key => $name) {
				//error_log("Name: $name Quantity: {$quantity[$key]} Status: {$status[$key]} Role: {$role[$key]}");

				// Search for direct account name, then user in accounts first
				$search = "\"$name\"";
				$id = $GLOBALS['egw']->accounts->name2id($name, 'account_fullname');
				if(!$id) {
					$contacts = ExecMethod2('addressbook.addressbook_bo.search', $search,array('contact_id','account_id'),'org_name,n_family,n_given,cat_id,contact_email','','%',false,'OR',array(0,1));
					if($contacts) $id = $contacts[0]['account_id'] ? $contacts[0]['account_id'] : 'c'.$contacts[0]['contact_id'];
				}
				if(!$id)
				{
					// Use calendar's registered resources to find participant
					foreach($this->bo->resources as $resource)
					{
						// Can't search for email
						if($resource['app'] == 'email') continue;
						// Special resource search, since it does special stuff in link_query
						if($resource['app'] == 'resources')
						{
							if(!$this->resource_so)
							{
								$this->resource_so = new resources_so();
							}
							$result = $this->resource_so->search($search,'res_id');
							if(count($result) >= 1) {
								$id = $resource['type'].$result[0]['res_id'];
								break;
							}
						}
						else
						{
							// Search app via link query
							$result = egw_link::query($resource['app'], $search, $options);
						
							if($result)
							{
								$id = $resource['type'] . key($result);
								break;
							}
						}
					}
				}
				if($id) {
					$p_participants[$id] = calendar_so::combine_status(
						$this->status_map[lang($status[$key])] ? $this->status_map[lang($status[$key])] : $status[$key][0],
						$quantity[$key] ? $quantity[$key] : 1,
						$this->role_map[lang($role[$key])] ? $this->role_map[lang($role[$key])] : $role[$key]
					);
				}
				else
				{
					$missing[] = $name;
				}
				if(count($missing) > 0)
				{
					$this->warnings[$import_csv->get_current_position()] = $record->title . ' ' . lang('participants') . ': ' .
						lang('Contact not found!') . '<br />'.implode(", ",$missing);
				}
			}
			$record->participants = $p_participants;
		}

		if($record->recurrence)
		{
			list($record->recur_type, $record->recur_interval) = explode('/',$record->recurrence,2);
			$record->recur_interval = trim($record->recur_interval);
			$record->recur_type = array_search(strtolower(trim($record->recur_type)), array_map('strtolower',$lookups['recurrence']));
			unset($record->recurrence);
		}
		$record->tzid = calendar_timezones::id2tz($record->tz_id);

		if ( $_definition->plugin_options['conditions'] ) {
			foreach ( $_definition->plugin_options['conditions'] as $condition ) {
				$records = array();
				switch ( $condition['type'] ) {
					// exists
					case 'exists' :
						// Check for that record
						$result = $this->exists($record, $condition, $records);

						if ( is_array( $records ) && count( $records ) >= 1) {
							// apply action to all records matching this exists condition
							$action = $condition['true'];
							foreach ( (array)$records as $event ) {
								$record->id = $event['id'];
								if ( $this->definition->plugin_options['update_cats'] == 'add' ) {
									if ( !is_array( $record->category ) ) $record->category = explode( ',', $record->category );
									$record->category = implode( ',', array_unique( array_merge( $record->category, $event['category'] ) ) );
								}
								$success = $this->action(  $action['action'], $record, $import_csv->get_current_position() );
							}
						} else {
							$action = $condition['false'];
							$success = ($this->action(  $action['action'], $record, $import_csv->get_current_position() ));
						}
						break;

					// not supported action
					default :
						die('condition / action not supported!!!');
						break;
				}
				if ($action['last']) break;
			}
		} else {
			// unconditional insert
			$success = $this->action( 'insert', $record, $import_csv->get_current_position() );
		}
		
		return $success;
	}

	/**
	 * Search for matching records, based on the the given condition
	 *
	 * @param record
	 * @param condition array = array('string' => field name)
	 * @param matches - On return, will be filled with matching records
	 *
	 * @return boolean
	 */
	protected function exists(importexport_iface_egw_record &$record, Array &$condition, &$records = array())
	{
		if($record->__get($condition['string']) && $condition['string'] == 'id') {
			$event = $this->bo->read($record[$condition['string']]);
			$records = array($event);
		}

		if ( is_array( $records ) && count( $records ) >= 1) {
			return true;
		}
		return false;
	}

	/**
	 * perform the required action
	 *
	 * @param int $_action one of $this->actions
	 * @param array $_data record data for the action
	 * @return bool success or not
	 */
	protected function action ( $_action, importexport_iface_egw_record &$record, $record_num = 0 )
	{
		$_data = $record->get_record_array();
		switch ($_action) {
			case 'none' :
				return true;
			case 'update' :
				// Only update if there are changes
				$old = $this->bo->read($_data['id']);

				// Don't change a user account into a record
				if(!$this->definition->plugin_options['change_owner']) {
					// Don't change owner of an existing record
					unset($_data['owner']);
				}

				// Merge to deal with fields not in import record
				$_data = array_merge($old, $_data);
				$changed = $this->tracking->changed_fields($_data, $old);
				if(count($changed) == 0) {
					return true;
				}
				// Fall through
			case 'insert' :
				if($_action == 'insert') {
					// Backend doesn't like inserting with ID specified, can overwrite existing
					unset($_data['id']);
				}
				// Make sure participants are set
				if(!$_data['participants']) {
					$user = $_data['owner'] ? $_data['owner'] : $this->user;
					$_data['participants'] = array(
						$user => 'U'
					);
				}
				if ( $this->dry_run ) {
					//print_r($_data);
					$this->results[$_action]++;
					return true;
				} else {
					$result = $this->bo->save( $_data, $this->is_admin);
					if(!$result) {
						$this->errors[$record_num] = lang('Unable to save');
					} else {
						$this->results[$_action]++;
						// This does nothing (yet?) but update the identifier
						$record->save($result);
					}
					return $result;
				}
			default:
				throw new egw_exception('Unsupported action');

		}
	}

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

	/**
	 * returns translated (user) description of plugin
	 *
	 * @return string descriprion
	 */
	public static function get_description() {
		return lang("Imports events into your Calendar from a CSV File. CSV means 'Comma Seperated Values'. However in the options Tab you can also choose other seperators.");
	}

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

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

	/**
        * 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
?>