Upsell Addon for add mutiple order product to upsell with predefined discount set in upsell offer

Upsell Addon for add mutiple order product to upsell with predefined discount set in upsell offer

class WFOCU_Upsell_Addon {
	public function __construct() {
		add_action( 'wp_footer', [ $this, 'js' ] );
		add_shortcode( 'wfocu_bucket_total', [ $this, 'bucket_total' ] );
		add_filter( 'wfocu_build_offer_product_before', array( $this, 'maybe_check_offer_data_for_qty_change' ), 10, 2 );
		add_filter( 'wfocu_prepare_upsell_package_before', array( $this, 'maybe_check_offer_data_for_qty_change' ), 10, 2 );
		add_action( 'wfocu_add_custom_html_above_accept_button', array( $this, 'schemes_template_html' ), 10, 2 );
		add_filter( 'wfocu_validate_charge_request', '__return_true' );

	}

	public function maybe_check_offer_data_for_qty_change( $offer_data ) {
		try {
			$items        = WFOCU_Core()->data->get_current_order()->get_items();
			$product_data = null;
			$first_key    = '';
			foreach ( $offer_data->products as $key => $prod ) {
				$product_data = $offer_data->fields->{$key};
				$first_key    = $key;
				break;

			}
			if ( empty( $first_key ) ) {
				return $offer_data;
			}

			/**
			 * @var $item WC_Order_Item_Product;
			 */
			foreach ( $items as $item ) {
				if ( $item->get_total() == 0 ) {
					continue;
				}
				$pid                           = $item->get_product_id();
				$pkey                          = md5( $pid );
				$offer_data->products->{$pkey} = $pid;
				$product_data->quantity        = $item->get_quantity();
				$offer_data->fields->{$pkey}   = $product_data;
			}
			unset( $offer_data->products->{$first_key} );
			unset( $offer_data->fields->{$first_key} );
		} catch ( Exception|Error $e ) {


		}

		return $offer_data;
	}

	public function schemes_template_html() {
		echo "<button class='wfocu_multi_product_add' style='height:50px;width:150px;padding:5px;margin-bottom:10px'>Add Product</button>";

	}

	public function bucket_total() {
		echo "<p class='wfocu_bucket_total'></p>";
	}

	public function js() {

		?>
        <script>
            (function ($) {
                console.log('jquery loaded');
                let MainBucket = null;
                $(document).on('wfocuBucketLinksConverted', function (e, Bucket) {
                    console.log(Bucket);
                    MainBucket = Bucket;

                });
                $(document).on('wfocuBucketCreated', function (e, Bucket) {
                    console.log('wfocuBucketCreated', Bucket);
                    for (let i in wfocu_vars.offer_data.products) {
                        let qty = wfocu_vars.offer_data.fields[i].quantity;
                        let tax = wfocu_vars.offer_data.products[i].tax;
                        let price = wfocu_vars.offer_data.products[i].price;
                        Bucket.addItem(i, price, [], tax, qty)
                    }
                    $('.wfocu_bucket_total').html(Bucket.formatMoney(Bucket.getTotal()))
                    MainBucket = Bucket;
                });
                $(window).on('load', function () {
                    $('body').on('click', '.wfocu_multi_product_add', function () {
                        console.log('send button clicked');
                        MainBucket.sendBucket();
                    })
                    window.wfocu_send_multi_product = function () {
                        console.log('send button clicked1');
                        MainBucket.sendBucket();
                    }
                })
            })(jQuery)
        </script>
		<?php
	}
}

new WFOCU_Upsell_Addon();