<?php

// Prevent license renewal when associated subscription is failing
// (it will cause double charges and double subscriptions and waste a lot of your time)
add_action( 'edd_pre_add_to_cart', function( $download_id, $options ) {
	// Only applicable if this is a renewal.
	if ( empty( $options['is_renewal'] ) ) {
		return;
	}

	// Handle action parameters.
	$download_id = absint( $download_id );
	$license_id  = absint( $options['license_id'] );
	$license_key = sanitize_text_field( $options['license_key'] );

	// We rely on a number of classes to accomplish this task.
	if (
		! class_exists( 'EDD_Customer' )
		|| ! class_exists( 'EDD_Recurring_Subscriber' )
		|| ! function_exists( 'edd_software_licensing' )
	) {
		return;
	}

	// Retrieve subscriptions for the subscriber.
	$subscriber    = new EDD_Recurring_Subscriber( get_current_user_id(), true );
	$subscriptions = $subscriber->get_subscriptions( $download_id );

	if ( empty( $subscriptions ) ) {
		return;
	}

	$licence_being_renewed = edd_software_licensing()->get_license( $license_id );

	// Loop through the subscriptions to find the associated license keys.
	foreach ( $subscriptions as $subscription ) {

		// If this parent payment ID doesn't match the payment ID of the license being renewed, it's inapplicable.
		if ( $subscription->parent_payment_id != $licence_being_renewed->payment_id ) {
			continue;
		}

		// We have the subscription for the license being renewed.
		// If the status is failing we need to prevent adding to cart.
		if ( 'stripe' == $subscription->gateway && 'failing' == $subscription->status ) {
			wp_safe_redirect( site_url( 'account/payment-information/' ) );
			die();
		}
	}
}, 5, 2 );