<?php

// SPDX-FileCopyrightText: 2022 Andrea Chirulescu <andrea.chirulescu@gmail.com>
// SPDX-FileCopyrightText: 2022 Harald Eilertsen <haraldei@anduin.net>
//
// SPDX-License-Identifier: AGPL-3.0-or-later

use Kigkonsult\Icalcreator\Vcalendar;

if ( ! class_exists( "GiglogAdmin_IcalExport" ) )
{
    class Giglogadmin_IcalExport
    {
        public static function export_ical()
        {
            // create a new calendar
            $vcalendar = Vcalendar::factory( [ Vcalendar::UNIQUE_ID => "kigkonsult.se", ] )
                // with calendaring info
                ->setMethod( Vcalendar::PUBLISH )
                ->setXprop(
                    Vcalendar::X_WR_CALNAME,
                    "Calendar Sample"
                )
                ->setXprop(
                    Vcalendar::X_WR_CALDESC,
                    "This is a demo calendar"
                )
                ->setXprop(
                    Vcalendar::X_WR_RELCALID,
                    "3E26604A-50F4-4449-8B3E-E4F4932D05B5"
                )
                ->setXprop(
                    Vcalendar::X_WR_TIMEZONE,
                    "Europe/Stockholm"
                );

            // create a new event
            $event1 = $vcalendar->newVevent()
                                ->setTransp( Vcalendar::OPAQUE )
                                ->setClass( Vcalendar::P_BLIC )
                                ->setSequence( 1 )
                            // describe the event
                                ->setSummary( 'Scheduled meeting with five occurrences' )
                                ->setDescription(
                                    'Agenda for the the meeting...',
                                    [ Vcalendar::ALTREP =>
                                    'CID:<FFFF__=0ABBE548DFE235B58f9e8a93d@coffeebean.com>' ]
                                )
                                ->setComment( 'It\'s going to be fun..' )
                            // place the event
                                ->setLocation( 'Kafé Ekorren Stockholm' )
                                ->setGeo( '59.32206', '18.12485' )
                            // set the time
                                ->setDtstart(
                                    new DateTime(
                                        '20190421T090000',
                                        new DateTimezone( 'Europe/Stockholm' )
                                    )
                                )
                                ->setDtend(
                                    new DateTime(
                                        '20190421T100000',
                                        new DateTimezone( 'Europe/Stockholm' )
                                    )
                                )
                                // with recurrence rule
                                ->setRrule(
                                    [
                                        Vcalendar::FREQ  => Vcalendar::WEEKLY,
                                        Vcalendar::COUNT => 5,
                                    ]
                                )
                                // and set another on a specific date
                                ->setRdate(
                                    [
                                        new DateTime(
                                            '20190609T090000',
                                            new DateTimezone( 'Europe/Stockholm' )
                                        ),
                                        new DateTime(
                                            '20190609T110000',
                                            new DateTimezone( 'Europe/Stockholm' )
                                        ),
                                    ],
                                    [ Vcalendar::VALUE => Vcalendar::PERIOD ]
                                )
                                // and revoke a recurrence date
                                ->setExdate(
                                    new DateTime(
                                        '2019-05-12 09:00:00',
                                        new DateTimezone( 'Europe/Stockholm' )
                                    )
                                )
                                // organizer, chair and some participants
                                ->setOrganizer(
                                    'secretary@coffeebean.com',
                                    [ Vcalendar::CN => 'Secretary CoffeeBean' ]
                                )
                                ->setAttendee(
                                    'president@coffeebean.com',
                                    [
                                        Vcalendar::ROLE     => Vcalendar::CHAIR,
                                        Vcalendar::PARTSTAT => Vcalendar::ACCEPTED,
                                        Vcalendar::RSVP     => Vcalendar::FALSE,
                                        Vcalendar::CN       => 'President CoffeeBean',
                                    ]
                                )
                                ->setAttendee(
                                    'participant1@coffeebean.com',
                                    [
                                        Vcalendar::ROLE     => Vcalendar::REQ_PARTICIPANT,
                                        Vcalendar::PARTSTAT => Vcalendar::NEEDS_ACTION,
                                        Vcalendar::RSVP     => Vcalendar::TRUE,
                                        Vcalendar::CN       => 'Participant1 CoffeeBean',
                                    ]
                                )
                                ->setAttendee(
                                    'participant2@coffeebean.com',
                                    [
                                        Vcalendar::ROLE     => Vcalendar::REQ_PARTICIPANT,
                                        Vcalendar::PARTSTAT => Vcalendar::NEEDS_ACTION,
                                        Vcalendar::RSVP     => Vcalendar::TRUE,
                                        Vcalendar::CN       => 'Participant2 CoffeeBean',
                                    ]
                                );

            // add alarm for the event
            $alarm = $event1->newValarm()
                            ->setAction( Vcalendar::DISPLAY )
                        // copy description from event
                            ->setDescription( $event1->getDescription())
                        // fire off the alarm one day before
                            ->setTrigger( '-P1D' );

            // alter day and time for one event in recurrence set
            $event2 = $vcalendar->newVevent()
                                ->setTransp( Vcalendar::OPAQUE )
                                ->setClass( Vcalendar::P_BLIC )
                            // reference to event in recurrence set
                                ->setUid( $event1->getUid())
                                ->setSequence( 2 )
                            // pointer to event in the recurrence set
                                ->setRecurrenceid( '20190505T090000 Europe/Stockholm' )
                            // reason text
                                ->setDescription(
                                    'Altered day and time for event 2019-05-05',
                                    [ Vcalendar::ALTREP =>
                                    'CID:<FFFF__=0ABBE548DFE235B58f9e8a93d@coffeebean.com>' ]
                                )
                                ->setComment( 'Now we are working hard for two hours' )
                            // the altered day and time with duration
                                ->setDtstart(
                                    new DateTime(
                                        '20190504T100000',
                                        new DateTimezone( 'Europe/Stockholm' )
                                    )
                                )
                                ->setDuration( 'PT2H' )
                            // add alarm (copy from event1)
                                ->setComponent(
                                    $event1->getComponent( Vcalendar::VALARM )
                                );

            $vcalendarString =
                // apply appropriate Vtimezone with Standard/DayLight components
                $vcalendar->vtimezonePopulate()
                // and create the (string) calendar
                          ->createCalendar();

            header( 'Content-Type: text/calendar' );
            echo $vcalendarString;
        }
    }

    add_action( 'wp_ajax_nopriv_giglog_export_ical', [ 'GiglogAdmin_IcalExport', 'export_ical' ] );
}