WordPress theme starter content with custom post type and postmeta integration

vs-wp-starter-content.php

<?php

/**
 * Sets up theme defaults and registers support for various WordPress features.
 *
 * Note that this function is hooked into the after_setup_theme hook, which
 * runs before the init hook. The init hook is too late for some features, such
 * as indicating support for post thumbnails.
 */
function aperture_setup() {

	// Define and register starter content to showcase the theme on new sites.
	$starter_content = array(

		// Create the custom image attachments used as post thumbnails for pages.
		'attachments' => array(
			'image-boulder' => array(
				'post_title' => _x( 'Boulder', 'Theme starter content', 'vs' ),
				'file' => 'assets/images/boulder.jpg', // URL relative to the template directory.
			),
			'image-flare' => array(
				'post_title' => _x( 'Flare', 'Theme starter content', 'vs' ),
				'file' => 'assets/images/flare.jpg',
			),
			'image-kiss' => array(
				'post_title' => _x( 'Kiss', 'Theme starter content', 'vs' ),
				'file' => 'assets/images/kiss.jpg',
			),
			'image-man' => array(
				'post_title' => _x( 'Man', 'Theme starter content', 'vs' ),
				'file' => 'assets/images/man.jpg', // URL relative to the template directory.
			),
			'image-moon' => array(
				'post_title' => _x( 'Moon', 'Theme starter content', 'vs' ),
				'file' => 'assets/images/moon.jpg',
			),
			'image-record' => array(
				'post_title' => _x( 'Record', 'Theme starter content', 'vs' ),
				'file' => 'assets/images/record.jpg',
			),
			'image-sea' => array(
				'post_title' => _x( 'Sea', 'Theme starter content', 'vs' ),
				'file' => 'assets/images/sea.jpg', // URL relative to the template directory.
			),
			'image-thinker' => array(
				'post_title' => _x( 'Thinker', 'Theme starter content', 'vs' ),
				'file' => 'assets/images/thinker.jpg',
			),
			'image-woods' => array(
				'post_title' => _x( 'Woods', 'Theme starter content', 'vs' ),
				'file' => 'assets/images/woods.jpg',
			),
		),

		// Specify the core-defined pages to create and add custom thumbnails to some of them.
		'posts' => array(
			'home',
			'about',
			'contact',
			'blog',
			'gallery' => array(
				'post_type' => 'vs_gallery', 
				'post_title' => _x( 'Example Gallery', 'Theme starter content', 'vs' ),
				'post_content' => '',
			),
			'cart' => array(
				'post_type' => 'page',
				'post_title' => _x( 'Cart', 'Theme starter content', 'vs' ),
				'post_content' => '[vs_cart]',
			),
			'search' => array(
				'post_type' => 'page',
				'post_title' => _x( 'Advanced Search', 'Theme starter content', 'vs' ),
				'post_content' => '[vs_search]',
			),
			'thanks' => array(
				'post_type' => 'page',
				'post_title' => _x( 'Thanks', 'Theme starter content', 'vs' ),
				'post_content' => '[vs_thanks]',
			),
			'lightbox' => array(
				'post_type' => 'page',
				'post_title' => _x( 'Lightbox', 'Theme starter content', 'vs' ),
				'post_content' => '[vs_lightbox]',
			),
			'login' => array(
				'post_type' => 'page',
				'post_title' => _x( 'Login', 'Theme starter content', 'vs' ),
				'post_content' => '[vs_login]',
			),
			'dashboard' => array(
				'post_type' => 'page',
				'post_title' => _x( 'Dashboard', 'Theme starter content', 'vs' ),
				'post_content' => '[vs_dashboard]',
			),
		),

		// the widgets
		'widgets' => array(
			// Add the homepage widget
			'homepage' => array(
				'example_gallery' => array(
					'gallery', array(
						'vs-gallery-title' => _x( 'Example Gallery', 'Theme starter content', 'vs' ),
						'vs-gallery-show' => 'single',
						'vs-gallery-id' => '{{gallery}}',
						'vs-gallery-qty' => '9',
					),
				),
				'example_map' => array(
					'map',
				),
			),
		),

		// Default to a static front page and assign the front and posts pages.
		'options' => array(
			'show_on_front' => 'page',
			'page_on_front' => '{{home}}',
			'page_for_posts' => '{{blog}}',
		),

		// Set up nav menus for each of the two areas registered in the theme.
		'nav_menus' => array(
			// Assign a menu to the "top" location.
			'top' => array(
				'name' => __( 'Top Menu', 'vs' ),
				'items' => array(
					'link_home', // Note that the core "home" page is actually a link in case a static front page is not used.
					'archive_galleries' => array(
						'title' => _x( 'Galleries', 'Theme starter content', 'vs' ),
						'url' => esc_url( site_url( 'galleries' ) ),
					),
					'page_blog',
					'page_contact',
					'page_cart' => array(
						'type' => 'post_type',
						'object' => 'page',
						'object_id' => '{{cart}}',
					),
				),
			),

			// Assign a menu to the "social" location.
			'social' => array(
				'name' => __( 'Social Links Menu', 'vs' ),
				'items' => array(
					'link_twitter' => array(
						'title' => _x( 'Twitter', 'Theme starter content', 'vs' ),
						'url' => 'https://twitter.com/',
					),
					'link_facebook' => array(
						'title' => _x( 'Facebook', 'Theme starter content', 'vs' ),
						'url' => 'https://facebook.com/',
					),
					'link_instagram' => array(
						'title' => _x( 'Instagram', 'Theme starter content', 'vs' ),
						'url' => 'https://instagram.com/',
					),
				),
			),
		),
	);

	add_theme_support( 'starter-content', $starter_content );
}
add_action( 'after_setup_theme', 'aperture_setup' );

/**
 * Add postmeta to starter content posts
 * @param  array $content  the starter content array
 * @param  [type] $config  [description]
 * @return [type]          [description]
 */
function aperture_starter_content_add_postmeta( $content, $config ) {

	// bail if not a fresh site
	if ( false === get_option( 'fresh_site' ) ) {
		return;
	}
	
	// loop over attachments added as starter-content
	$args = array(
		'posts_per_page' => 9,
		'post_type' => 'attachment',
	);
	$attachments = get_posts( $args );

	if ( $attachments && is_array( $attachments ) ) {
		$attachment_ids = array();
		foreach ( $attachments as $attachment ) {
			$attachment_ids[] = $attachment->ID;
		}
		// set attachments at postmeta
	    if ( isset( $content['posts']['gallery'] ) ) {
	        $content['posts']['gallery']['meta_input'] = array(
	        	'_vs_gallery' => $attachment_ids,
	        );
	    }
	}

    return $content;
}
add_filter( 'get_theme_starter_content', 'aperture_starter_content_add_postmeta', 10, 2 );