<?php
/**
 * Prevent booked Cursus dates from being accidentally deleted in Agenda
 *
 * @package agenda
 * @subpackage plugin
 */

namespace TreehillStudio\Ferienprogramm\Plugins\Events;

use TreehillStudio\Agenda\Agenda;
use TreehillStudio\Agenda\Plugins\Plugin;
use TreehillStudio\Cursus\Cursus;
use xPDO;

class OnAgendaBeforeRemove extends Plugin
{
    /** @var Agenda $agenda */
    public $agenda;
    /** @var Cursus $cursus */
    public $cursus;

    public function process()
    {
        $corePath = $this->modx->getOption('agenda.core_path', null, $this->modx->getOption('core_path') . 'components/agenda/');
        $this->agenda = $this->modx->getService('agenda', 'Agenda', $corePath . 'model/agenda/', [
            'core_path' => $corePath
        ]);
        $this->cursus = &$this->agenda->cursus;

        $eventId = $this->scriptProperties['id'];
        $className = $this->scriptProperties['className'];

        if (!$this->modx->loadClass('agenda.AgendaEvents', $this->agenda->getOption('modelPath'))) {
            $this->modx->log(xPDO::LOG_LEVEL_ERROR, 'Could not load AgendaEvents class!', '', 'OnAgendaBeforeRemove');
            return;
        }
        if (!$this->modx->loadClass('agenda.AgendaEventDates', $this->agenda->getOption('modelPath'))) {
            $this->modx->log(xPDO::LOG_LEVEL_ERROR, 'Could not load AgendaEventDates class!', '', 'OnAgendaBeforeRemove');
            return;
        }

        if ($eventId) {
            if ($className == 'AgendaEvents') {
                $c = $this->modx->newQuery('CursusEventParticipants');
                $c->leftJoin('AgendaEventDates', 'AgendaEventDates', 'CursusEventParticipants.event_id = AgendaEventDates.id');
                $c->where(['AgendaEventDates.event_id' => $eventId]);
                $count = $this->modx->getCount('CursusEventParticipants', $c);
                if ($count > 0) {
                    $this->modx->event->_output = 'There are already repeating events booked for this event. Therefore, it is not possible to delete the event.';
                }
            }
            if ($className == 'AgendaEventDates') {
                $participants = $this->modx->getObject('CursusEventParticipants', ['event_id' => $eventId]);
                if ($participants) {
                    $this->modx->event->_output = 'The event repeat has already been booked. Therefore, it is not possible to delete it.';
                }
            }
        }
    }
}