<?php
  /**
   * ownCloud - Calendar
   *
   * @author Bart Visscher
   * @copyright 2011 Bart Visscher bartv@thisnet.nl
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
   * License as published by the Free Software Foundation; either
   * version 3 of the License, or any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
   *
   * You should have received a copy of the GNU Affero General Public
   * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
   *
   */
  
  /**
   * This class manages our tasks
   */
  OC_Task_App::$l10n = new OC_L10N('tasks');
  class OC_Task_App {
  	public static $l10n;
  
  	public static function getPriorityOptions()
  	{
  		return array(
  			''  => self::$l10n->t('Unspecified'),
  			'1' => self::$l10n->t('1=highest'),
  			'2' => '2',
  			'3' => '3',
  			'4' => '4',
  			'5' => self::$l10n->t('5=medium'),
  			'6' => '6',
  			'7' => '7',
  			'8' => '8',
  			'9' => self::$l10n->t('9=lowest'),
  		);
  	}
  
  	public static function arrayForJSON($id, $vtodo, $user_timezone)
  	{
                  $task = array( 'id' => $id );
  		$task['summary'] = $vtodo->getAsString('SUMMARY');
  		$task['description'] = $vtodo->getAsString('DESCRIPTION');
  		$task['location'] = $vtodo->getAsString('LOCATION');
  		$task['categories'] = $vtodo->getAsArray('CATEGORIES');
  		$due = $vtodo->DUE;
  		if ($due) {
  			$task['due_date_only'] = $due->getDateType() == Sabre\VObject\Property\DateTime::DATE;
  			$due = $due->getDateTime();
  			$due->setTimezone(new DateTimeZone($user_timezone));
  			$task['due'] = $due->format('U');
  		}
  		else {
  			$task['due'] = false;
  		}
  		$task['priority'] = $vtodo->getAsString('PRIORITY');
  		$completed = $vtodo->COMPLETED;
  		if ($completed) {
  			$completed = $completed->getDateTime();
  			$completed->setTimezone(new DateTimeZone($user_timezone));
  			$task['completed'] = $completed->format('Y-m-d H:i:s');
  		}
  		else {
  			$task['completed'] = false;
  		}
  		$task['complete'] = $vtodo->getAsString('PERCENT-COMPLETE');
  		return $task;
  	}
  
  	public static function validateRequest($request)
  	{
  		$errors = array();
  		if($request['summary'] == '') {
  			$errors['summary'] = self::$l10n->t('Empty Summary');
  		}
  
  		try {
  			$timezone = OC_Calendar_App::getTimezone();
  			$timezone = new DateTimeZone($timezone);
  			new DateTime($request['due'], $timezone);
  		} catch (Exception $e) {
  			$errors['due'] = self::$l10n->t('Invalid date/time');
  		}
  
  		if ($request['percent_complete'] < 0 || $request['percent_complete'] > 100) {
  			$errors['percent_complete'] = self::$l10n->t('Invalid percent complete');
  		}
  		if ($request['percent_complete'] == 100 && !empty($request['completed'])) {
  			try {
  				$timezone = OC_Calendar_App::getTimezone();
  				$timezone = new DateTimeZone($timezone);
  				new DateTime($request['completed'], $timezone);
  			} catch (Exception $e) {
  				$errors['completed'] = self::$l10n->t('Invalid date/time');
  			}
  		}
  
  		$priority_options = self::getPriorityOptions();
  		if (!in_array($request['priority'], array_keys($priority_options))) {
  			$errors['priority'] = self::$l10n->t('Invalid priority');
  		}
  		return $errors;
  	}
  
  	public static function createVCalendarFromRequest($request)
  	{
  		$vcalendar = new OC_VObject('VCALENDAR');
  		$vcalendar->add('PRODID', 'ownCloud Calendar');
  		$vcalendar->add('VERSION', '2.0');
  
  		$vtodo = new OC_VObject('VTODO');
  		$vcalendar->add($vtodo);
  
  		$vtodo->setDateTime('CREATED', 'now', Sabre\VObject\Property\DateTime::UTC);
  
  		$vtodo->setUID();
  		return self::updateVCalendarFromRequest($request, $vcalendar);
  	}
  
  	public static function updateVCalendarFromRequest($request, $vcalendar)
  	{
  		$summary = $request['summary'];
  		$categories = $request["categories"];
  		$priority = $request['priority'];
  		$percent_complete = $request['percent_complete'];
  		$completed = $request['completed'];
  		$location = $request['location'];
  		$due = $request['due'];
  		$description = $request['description'];
  
  		$vtodo = $vcalendar->VTODO;
  
  		$vtodo->setDateTime('LAST-MODIFIED', 'now', Sabre\VObject\Property\DateTime::UTC);
  		$vtodo->setDateTime('DTSTAMP', 'now', Sabre\VObject\Property\DateTime::UTC);
  		$vtodo->setString('SUMMARY', $summary);
  
  		$vtodo->setString('LOCATION', $location);
  		$vtodo->setString('DESCRIPTION', $description);
  		$vtodo->setString('CATEGORIES', $categories);
  		$vtodo->setString('PRIORITY', $priority);
  
  		if ($due) {
  			$timezone = OC_Calendar_App::getTimezone();
  			$timezone = new DateTimeZone($timezone);
  			$due = new DateTime($due, $timezone);
  			$vtodo->setDateTime('DUE', $due);
  		} else {
  			unset($vtodo->DUE);
  		}
  
  		self::setComplete($vtodo, $percent_complete, $completed);
  
  		return $vcalendar;
  	}
  
  	public static function setComplete($vtodo, $percent_complete, $completed)
  	{
  		if (!empty($percent_complete)) {
  			$vtodo->setString('PERCENT-COMPLETE', $percent_complete);
  		}else{
  			$vtodo->__unset('PERCENT-COMPLETE');
  		}
  
  		if ($percent_complete == 100) {
  			if (!$completed) {
  				$completed = 'now';
  			}
  		} else {
  			$completed = null;
  		}
  		if ($completed) {
  			$timezone = OC_Calendar_App::getTimezone();
  			$timezone = new DateTimeZone($timezone);
  			$completed = new DateTime($completed, $timezone);
  			$vtodo->setDateTime('COMPLETED', $completed);
  			OCP\Util::emitHook('OC_Task', 'taskCompleted', $vtodo);
  		} else {
  			unset($vtodo->COMPLETED);
  		}
  	}
  }