Add support of Gutenberg to Sugar Calendar with minor tweaks

sugar-calendar-gutenberg.php

<?php
/**
 * Plugin Name: Sugar Calendar - Gutenberg
 * Description: Add support of Gutenberg to Sugar Calendar with minor tweaks
 * Author:      Be API Team
 * Author URI:  http://beapi.fr/
 * License:     GNU General Public License v2 or later
 * License URI: http://www.gnu.org/licenses/gpl-2.0.html
 *
 * @see: https://gist.github.com/herewithme/f1c377377cc3dcedc8388dd97196fdb6
 */

namespace BEAPI\SugarCalendar;

add_filter( 'sc_event_supports', __NAMESPACE__ . '\\sc_event_supports' );
/**
 * Gutenberg need EDITOR supports
 *
 * @return array
 *
 * @param array $supports
 */
function sc_event_supports( array $supports ) {
	$supports[] = 'editor';

	return $supports;
}

add_filter( 'register_post_type_args', __NAMESPACE__ . '\\register_post_type_args', 10, 2 );
/**
 * Gutenberg need REST API support
 *
 * @return array
 *
 * @param $name
 * @param array $args
 */
function register_post_type_args( array $args, $name ) {
	if ( $name !== 'sc_event' ) {
		return $args;
	}

	$args['show_in_rest'] = true;
	$args['exclude_from_search'] = false;

	return $args;
}

add_action( 'add_meta_boxes', __NAMESPACE__ . '\\add_meta_boxes', 11 );
/**
 * Re-register metabox with a context compatible with Gutenberg
 */
function add_meta_boxes() {
	// Sections
	add_meta_box(
		'sugar_calendar_event_details',
		esc_html__( 'Event', 'sugar-calendar' ),
		'Sugar_Calendar\\Admin\\Editor\\Meta\\box',
		sugar_calendar_allowed_post_types(),
		'advanced',
		'high'
	);

	/*
	No register this metabox, doublon with Gutenberg
	add_meta_box(
		'sugar_calendar_details',
		esc_html__( 'Details', 'sugar-calendar' ),
		'Sugar_Calendar\\Admin\\Editor\\Meta\\details',
		sugar_calendar_get_event_post_type_id(),
		'advanced',
		'default'
	);
	*/
}

No longer useful. : awesomemotive/sugarcalendar-core#108