<?php

namespace Sabre\VObject\Component;

use DateTimeInterface;
use Sabre\VObject;

/**
 * VJournal component.
 *
 * This component contains some additional functionality specific for VJOURNALs.
 *
 * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
 * @author Evert Pot (http://evertpot.com/)
 * @license http://sabre.io/license/ Modified BSD License
 */
class VJournal extends VObject\Component {

    /**
     * Returns true or false depending on if the event falls in the specified
     * time-range. This is used for filtering purposes.
     *
     * The rules used to determine if an event falls within the specified
     * time-range is based on the CalDAV specification.
     *
     * @param DateTimeInterface $start
     * @param DateTimeInterface $end
     *
     * @return bool
     */
    function isInTimeRange(DateTimeInterface $start, DateTimeInterface $end) {

        $dtstart = isset($this->DTSTART) ? $this->DTSTART->getDateTime() : null;
        if ($dtstart) {
            $effectiveEnd = $dtstart;
            if (!$this->DTSTART->hasTime()) {
                $effectiveEnd = $effectiveEnd->modify('+1 day');
            }

            return ($start <= $effectiveEnd && $end > $dtstart);

        }
        return false;

    }

    /**
     * A simple list of validation rules.
     *
     * This is simply a list of properties, and how many times they either
     * must or must not appear.
     *
     * Possible values per property:
     *   * 0 - Must not appear.
     *   * 1 - Must appear exactly once.
     *   * + - Must appear at least once.
     *   * * - Can appear any number of times.
     *   * ? - May appear, but not more than once.
     *
     * @var array
     */
    function getValidationRules() {

        return [
            'UID'     => 1,
            'DTSTAMP' => 1,

            'CLASS'         => '?',
            'CREATED'       => '?',
            'DTSTART'       => '?',
            'LAST-MODIFIED' => '?',
            'ORGANIZER'     => '?',
            'RECURRENCE-ID' => '?',
            'SEQUENCE'      => '?',
            'STATUS'        => '?',
            'SUMMARY'       => '?',
            'URL'           => '?',

            'RRULE' => '?',

            'ATTACH'      => '*',
            'ATTENDEE'    => '*',
            'CATEGORIES'  => '*',
            'COMMENT'     => '*',
            'CONTACT'     => '*',
            'DESCRIPTION' => '*',
            'EXDATE'      => '*',
            'RELATED-TO'  => '*',
            'RDATE'       => '*',
        ];

    }

    /**
     * This method should return a list of default property values.
     *
     * @return array
     */
    protected function getDefaults() {

        return [
            'UID'     => 'sabre-vobject-' . VObject\UUIDUtil::getUUID(),
            'DTSTAMP' => date('Ymd\\THis\\Z'),
        ];

    }
}
