[MarketPress] - Checkout Custom Fields

mp-checkout-custom-fields.php

<?php
/*
Plugin Name: [MarketPress] - Checkout Custom Fields
Plugin URI: https://premium.wpmudev.org/
Description: Inserts custom fields in checkout page
Author: Panos Lyrakis @ WPMUDEV
Author URI: https://premium.wpmudev.org/
License: GPLv2 or later
*/


if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

if ( ! class_exists( 'WPMUDEV_MP_Checkout_Custom_Fields' ) ) {
	
	class WPMUDEV_MP_Checkout_Custom_Fields {

		private static $_instance = null;
		private $_custom_fields = array();
		private $_remove_fields = array();		

		public static function get_instance() {

			if( is_null( self::$_instance ) ){
				self::$_instance = new WPMUDEV_MP_Checkout_Custom_Fields();
			}

			return self::$_instance;
		}

		public function __construct() {			

			
			add_filter( 'mp_checkout/address_fields_array', array( $this, 'handle_fields' ), 20, 2 );
			add_filter( 'mp_order/get_address', array( $this, 'get_address' ), 20, 3 );

		}

		public function get_custom_fields( $type = 'billing' ){

			$custom_fields = array();

			if( 'billing' == $type ){

				$custom_fields['custom_field_one'] = array(
					'type'	 => 'text',
					'label'	 => __( 'Custom field one', 'mp' ),
					'name'	 => $this->field_name( 'custom_field_one', $type ),
					'value'	 => mp_get_user_address_part( 'custom_field_one', $type ),
					'atts'	 => array(
						'class' => 'mp_form_input',
					),
				
				);

				$custom_fields['custom_field_two'] = array(
					'type'	 => 'text',
					'label'	 => __( 'Custom field two', 'mp' ),
					'name'	 => $this->field_name( 'custom_field_two', $type ),
					'value'	 => mp_get_user_address_part( 'custom_field_two', $type ),
					'atts'	 => array(
						'class' => 'mp_form_input',
					),
				
				);

			}
			

			return $custom_fields;
		}

		public function get_address( $html, $type, $order ) {

			$custom_fields = $this->get_custom_fields();

			if( ! empty( $custom_fields ) ) {
				foreach( $custom_fields as $key => $custom_field ) {
					$field_label  = $custom_field['label'];
					$field_value = $order->get_meta( "mp_{$type}_info->{$key}" );

					$html .= "<div><strong>{$field_label}</strong>: {$field_value}</div>";
				}
			}

			return $html;
		}

		public function handle_fields( $address_fields, $type ) {

			
			$custom_fields = $this->get_custom_fields( $type );

			if( is_array( $custom_fields ) && ! empty( $custom_fields ) ){
				foreach( $custom_fields as $key => $custom_field ) {
					$address_fields[] = $custom_field;
				}
			}
			
			return $address_fields;
		}

		public function field_name( $name, $prefix = null ) {
			if ( !is_null( $prefix ) ) {
				return $prefix . '[' . $name . ']';
			}

			return $name;
		}
		

	}

	add_action( 'plugins_loaded', function(){
		$GLOBALS['WPMUDEV_MP_Checkout_Custom_Fields'] = WPMUDEV_MP_Checkout_Custom_Fields::get_instance();
	}, 20 );

}