<?php

declare(strict_types=1);

if (!isset($GLOBALS['TL_DCA']['tl_calendar_events']['fields']['externalId'])) {
    $GLOBALS['TL_DCA']['tl_calendar_events']['fields']['externalId'] = [
        'label' => ['External ID', 'Stabile externe ID für den Nossener-Land-Import.'],
        'exclude' => true,
        'search' => true,
        'sorting' => true,
        'filter' => true,
        'inputType' => 'text',
        'eval' => ['maxlength' => 64, 'tl_class' => 'w50'],
        'sql' => ['type' => 'string', 'length' => 64, 'default' => ''],
    ];
}

$GLOBALS['TL_DCA']['tl_calendar_events']['config']['sql']['keys'] ??= [];

if (!isset($GLOBALS['TL_DCA']['tl_calendar_events']['config']['sql']['keys']['externalId'])) {
    $GLOBALS['TL_DCA']['tl_calendar_events']['config']['sql']['keys']['externalId'] = 'index';
}