Adding Gutenberg Full Site Editing settings to WPGraphQL

wp-graphql-full-site-editing-config.php

// NOTE, THIS IS VERY EXPERIMENTAL. TAKE THIS WITH A BIG GRAIN OF SALT, BUT DO WHAT YOU WILL WITH IT.

register_graphql_object_type("ThemeSettings", [
	'description' => 'Theme Settings',
	'fields' => [
		'primaryColor' => [
			'type' => 'string',
			'description' => 'Primary Color',
			'resolve' => function ($settings) {
				$colors = $settings->settings->color->palette->theme;
				$primary_color = null;
				foreach ($colors as $color) {
					if ($color->slug === 'primary') {
						$primary_color = $color->color;
					}
				}
				return $primary_color;
			}
		],
		'isGlobalStylesUserThemeJSON' => [
			'type' => 'boolean'
		],
		'version' => [
			'type' => 'integer'
		],
		'colorPalette' => [
			'type' => [
				'list_of' => 'ThemeStylesPalette'
			],
			'resolve' => function ($settings) {
				// wp_send_json([$settings->settings->color->palette->theme]);
				return $settings->settings->color->palette->theme ?? null;
			}
		]
	]
]);

register_graphql_object_type("ThemeStylesPalette", [
	'fields' => [
		'name' => [
			'type' => 'string',
		],
		'slug' => [
			'type' => 'string',
		],
		'color' => [
			'type' => 'string',
		]
	]
]);

register_graphql_field("RootQuery", "themeSettings", [
	'type' => 'ThemeSettings',
	'resolve' => function () {
		$settingsPost = get_page_by_path('wp-global-styles-gravity-platform', OBJECT, 'wp_global_styles');
		// graphql_debug($settingsPost);
		// wp_send_json([$settingsPost]);
		if (empty($settingsPost->post_content)) {
			return null;
		}
		$decoded = json_decode($settingsPost->post_content);
		//wp_send_json([$decoded]);
		return $decoded;
	}
]);