<?php
/**
 * Filter order data sent to Klarna for adding EMD (Extra Merchant Data).
 *
 * Add-on functionality to Klarna Checkout for WooCommerce (https://wordpress.org/plugins/klarna-checkout-for-woocommerce/).
 * This should be used for Klarnas new platform V3.
 *
 * Learn more about available attachment types here: https://docs.klarna.com/klarna-checkout/popular-use-cases/extra-merchant-data/#how-its-done
 **/

add_filter('kco_wc_api_request_args', 'emd_kco_wc_api_request_args');
function emd_kco_wc_api_request_args( $request_args ) {
	
	if( is_user_logged_in() ) {
		
		// User is logged in - add user_login as unique_account_identifier
		$current_user = wp_get_current_user();
		
		$klarna_emd_info = array(
			'unique_account_identifier'		=> $current_user->user_login,
			'account_registration_date'		=> date( 'Y-m-d\TH:i', strtotime( $current_user->user_registered ) ),
			'account_last_modified'			=> date( 'Y-m-d\TH:i' ),
		);
		$klarna_emd_info = array( $klarna_emd_info );
		
	
	} else {
		
		// User is not logged in - send empty params
		$klarna_emd_info = array(
			'unique_account_identifier'		=> '',
		);
		$klarna_emd_info = array( $klarna_emd_info );
		
	}
    
	$body_attachment = json_encode( array(
			'customer_account_info' => $klarna_emd_info
		) );
			
	$request_args['attachment']['content_type'] = 'application/vnd.klarna.internal.emd-v2+json';
	$request_args['attachment']['body']         = $body_attachment;
	
	return $request_args;
}