Basic plugin to add Shortcode UI for Simplechart

simplechart-shortcake.php

<?php
/*
	Plugin Name: Simplechart/Shortcake UI Demo
	Plugin URI: http://www.alleyinteractive.com/
	Description: This plugin exists to demonstrate Simplechart with Shortcake UI
	Version: 0.1
	Author: Davis Shaver
	Author URI: http://www.alleyinteractive.com/
*/
/*  This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.
	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.
	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software
	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

/**
 * If Shortcake isn't active, then add an administration notice.
 *
 * @since 0.1
 */
function shortcode_ui_detection() {
	if ( ! function_exists( 'shortcode_ui_register_for_shortcode' ) ) {
		add_action( 'admin_notices', 'simplechart_shortcake_dev_example_notices' );
	}
}
add_action( 'init', 'shortcode_ui_detection' );

/**
 * Display the administration notice if the user can activate plugins.
 *
 * @since 0.1
 */
function simplechart_shortcake_dev_example_notices() {
	if ( current_user_can( 'activate_plugins' ) ) {
		?>
		<div class="error message">
			<p><?php esc_html_e( 'Shortcode UI plugin must be active for the Simplechart extension.', 'simplechart-shortcake' ); ?></p>
		</div>
		<?php
	}
}

/**
 * Register a basic Shortcode UI for Simplechart
 *
 * @since 0.1
 */
function shortcode_ui_for_simplechart() {
	shortcode_ui_register_for_shortcode(
		'simplechart',
		array(
			'label' => esc_html__( 'Simplechart', 'simplechart-shortcake' ),
			'listItemImage' => 'dashicons-chart-pie',
			'post_type' => array( 'post' ),
			'attrs' => array(
				array( 
					'label'    => esc_html__( 'Select Chart', 'Simplechart Shortcake' ),
					'attr'     => 'id',
					'type'     => 'post_select',
					'query'    => array( 'post_type' => 'simplechart' ),
				),
			),
		)
	);
}
add_action( 'register_shortcode_ui', 'shortcode_ui_for_simplechart' );