Add Buy Again Button

/**
 * Snippet Name:     Add Buy Again Button + Purchased Notice on Single Product
 * Snippet Author:   coding-bunny.com
 * Description:      Adds "Buy Again" button to WooCommerce completed orders in My Account.
 * Version:          1.1.0
 */

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

add_filter( 'woocommerce_my_account_my_orders_actions', 'cbbab_add_buy_again_button', 50, 2 );
function cbbab_add_buy_again_button( $actions, $order ) {
    if ( ! is_a( $order, 'WC_Order' ) ) {
        return $actions;
    }
    if ( $order->has_status( 'completed' ) ) {
        $order_id = $order->get_id();
        $url = add_query_arg(
            array(
                'cbbab_buy_again' => absint( $order_id ),
            ),
            wc_get_account_endpoint_url( 'orders' )
        );
        $url = wp_nonce_url( $url, 'cbbab_order_again' );
        $actions['cbbab-buy-again'] = array(
            'url'  => esc_url( $url ),
            'name' => esc_html__( 'Buy Again', 'woocommerce' ),
            'class' => 'cbbab-buy-again-button',
        );
    }
    return $actions;
}

add_action( 'template_redirect', 'cbbab_handle_buy_again_request', 20 );
function cbbab_handle_buy_again_request() {
    if (
        is_account_page() &&
        isset( $_GET['cbbab_buy_again'] ) &&
        ! empty( $_GET['cbbab_buy_again'] )
    ) {
        $order_id = absint( $_GET['cbbab_buy_again'] );
        if ( ! isset( $_GET['_wpnonce'] ) || ! wp_verify_nonce( $_GET['_wpnonce'], 'cbbab_order_again' ) ) {
            wc_add_notice( esc_html__( 'Action not allowed, please try again.', 'woocommerce' ), 'error' );
            return;
        }
        $order = wc_get_order( $order_id );
        if (
            ! $order ||
            get_current_user_id() !== $order->get_user_id()
        ) {
            wc_add_notice( esc_html__( 'Order not valid or not authorized.', 'woocommerce' ), 'error' );
            return;
        }

        $added = false;
        foreach ( $order->get_items() as $item_id => $item ) {
            $product_id = $item->get_product_id();
            $variation_id = $item->get_variation_id();
            $quantity = $item->get_quantity();
            $product = $item->get_product();
            $item_data = array();

            if ( ! $product || ! $product->is_purchasable() ) {
                continue;
            }

            if ( $variation_id && $item->get_meta_data() ) {
                foreach ( $item->get_meta_data() as $meta ) {
                    if ( taxonomy_exists( $meta->key ) ) {
                        $item_data[ $meta->key ] = $meta->value;
                    }
                }
            }

            $added = true;
            WC()->cart->add_to_cart(
                $product_id,
                $quantity,
                $variation_id,
                $item_data
            );
        }

        if ( $added ) {
            wc_add_notice( esc_html__( 'Products added to your cart.', 'woocommerce' ), 'success' );
            wp_safe_redirect( wc_get_cart_url() );
            exit;
        } else {
            wc_add_notice( esc_html__( 'Could not add the products to your cart.', 'woocommerce' ), 'error' );
        }
    }
}

add_action( 'woocommerce_before_single_product', 'cbbab_show_purchased_notice_on_product_page' );
function cbbab_show_purchased_notice_on_product_page() {
    if ( ! is_user_logged_in() || ! is_product() ) {
        return;
    }
    global $product;
    if ( ! $product || ! $product->get_id() ) {
        return;
    }

    $customer_id = get_current_user_id();
    $product_id  = $product->get_id();

    $customer_orders = wc_get_orders( array(
        'customer_id' => $customer_id,
        'status'      => 'completed',
        'limit'       => -1,
        'return'      => 'objects',
    ) );

    $order_link = '';
    foreach ( $customer_orders as $order ) {
        foreach ( $order->get_items() as $item ) {
            if ( $item->get_product_id() == $product_id || $item->get_variation_id() == $product_id ) {
                if ( function_exists( 'wc_get_account_view_order_url' ) ) {
                    $order_link = esc_url( wc_get_account_view_order_url( $order->get_id() ) );
                } else {
                    $order_link = esc_url( add_query_arg( 'view-order', $order->get_id(), wc_get_account_endpoint_url( 'orders' ) ) );
                }
                break 2;
            }
        }
    }

    if ( $order_link ) {
        $message = sprintf(
            esc_html__( 'You have previously purchased this product. %1$sView your order%2$s.', 'woocommerce' ),
            '<a href="' . $order_link . '">',
            '</a>'
        );
        wc_print_notice( $message, 'notice' );
    }
}

.cbbab-buy-again {
	background-color: #ff6b35;
  border-color: #ff6b35;
}

.cbbab-buy-again:hover {
  background-color: #e55a2b;
  border-color: #e55a2b;
}