Migrating widgets to a custom post type.

widget-to-cpt.php

<?php
/**
 * Plugin Name:     Widget to CPT
 * Plugin URI:      http://plugish.com
 * Description:     A simple how-to for migrating widgets to a CPT
 * Author:          JayWood
 * Author URI:      http://plugish.com
 * Version:         0.1.0
 */

class JW_Widget_to_CPT {

	/**
	 * Instance of JW_Widget_to_CPT
	 * @var JW_Widget_to_CPT
	 */
	public static $instance = null;

	public static function init() {
		if ( null == self::$instance ) {
			self::$instance = new self();
		}

		return self::$instance;
	}

	public function hooks() {
		// All hooks here.
		add_action( 'init', array( $this, 'migrate' ) );
		add_action( 'init', array( $this, 'register_post_type' ) );
	}

	public function register_post_type() {
		$labels = array(
			'name'               => _x( 'Focus', 'post type general name', 'your-plugin-textdomain' ),
			'singular_name'      => _x( 'Focus', 'post type singular name', 'your-plugin-textdomain' ),
			'menu_name'          => _x( 'Focus', 'admin menu', 'your-plugin-textdomain' ),
			'name_admin_bar'     => _x( 'Focus', 'add new on admin bar', 'your-plugin-textdomain' ),
			'add_new'            => _x( 'Add New', 'book', 'your-plugin-textdomain' ),
			'add_new_item'       => __( 'Add New Focus', 'your-plugin-textdomain' ),
			'new_item'           => __( 'New Focus', 'your-plugin-textdomain' ),
			'edit_item'          => __( 'Edit Focus', 'your-plugin-textdomain' ),
			'view_item'          => __( 'View Focus', 'your-plugin-textdomain' ),
			'all_items'          => __( 'All Focus', 'your-plugin-textdomain' ),
			'search_items'       => __( 'Search Focus', 'your-plugin-textdomain' ),
			'parent_item_colon'  => __( 'Parent Focus:', 'your-plugin-textdomain' ),
			'not_found'          => __( 'No focus found.', 'your-plugin-textdomain' ),
			'not_found_in_trash' => __( 'No focus found in Trash.', 'your-plugin-textdomain' )
		);

		$args = array(
			'labels'             => $labels,
			'description'        => __( 'Description.', 'your-plugin-textdomain' ),
			'public'             => true,
			'publicly_queryable' => true,
			'show_ui'            => true,
			'show_in_menu'       => true,
			'query_var'          => true,
			'rewrite'            => array( 'slug' => 'focus' ),
			'capability_type'    => 'post',
			'has_archive'        => true,
			'hierarchical'       => true,
			'menu_position'      => null,
			'supports'           => array( 'title', 'editor', 'author', 'thumbnail', 'excerpt', 'comments', 'page-attributes' )
		);

		register_post_type( 'focus', $args );
	}

	public function migrate() {

		if ( get_option( 'zl_has_imported', false ) ) {
			return;
		}

		$widgets        = wp_get_sidebars_widgets();
		$widget_set     = $widgets['sidebar-ourfocus'];
		$widget_options = get_option( 'widget_ctup-ads-widget' );

		foreach ( $widget_set as $index => $widget ) {

			// Grab the ID of the widget
			$widget_array = explode( '-', $widget );

			/**
			 * Now we grab the number ( key ) from the widget
			 * So ctup-ads-widget-1 for example will give us just the number 1
			 */
			$widget_key = end( $widget_array );

			/**
			 * The above grabbed key is associated with the array keys in the
			 * widget options, so we use that one here.
			 */
			$widget_data = $widget_options[ $widget_key ];

			/**
			 * Now that we have all our widget data
			 * we build up the insertion arguments
			 * for wp_insert_post()
			 */
			$insert_args = array(
				'post_type'    => 'focus',
				'post_status'  => 'publish',
				'menu_order'   => $index,
				'post_title'   => $widget_data['title'],
				'post_content' => $widget_data['text'],
				'meta_input'   => array(
					'link'      => $widget_data['link'],
					'image_uri' => $widget_data['image_uri']
				),
			);

			wp_insert_post( $insert_args );
		}

		update_option( 'zl_has_imported', true );

	}
}

function jw_widget_to_cpt() {
	return JW_Widget_to_CPT::init();
}
add_action( 'plugins_loaded', array( jw_widget_to_cpt(), 'hooks' ) );