Stop checkout and log order to text file.

wcafcl.php

//This code will fail the checkout process with a custom message. The order time and products that were attemtpted to be purchased will be logged to a text file in wp/content and the log will be displayed under Checkout Log in the wordpress Dashboard.

// Add custom admin page
add_action('admin_menu', 'auto_fail_custom_admin_page');
function auto_fail_custom_admin_page() {
    add_menu_page(
        'Checkout Log',
        'Checkout Log',
        'manage_options',
        'checkout-log',
        'auto_fail_custom_admin_page_callback'
    );
}

function auto_fail_custom_admin_page_callback() {
    $file_path = WP_CONTENT_DIR . '/checkout_log.txt';
    if (file_exists($file_path)) {
        $log_data = file_get_contents($file_path);
        $log_data = explode("\n", trim($log_data));
    } else {
        $log_data = array();
        file_put_contents($file_path, '');
    }
    ?>
    <div class="wrap">
        <h1>Checkout Log</h1>
        <ol>
            <?php foreach ($log_data as $log_entry) : ?>
                <li><?php echo esc_html($log_entry); ?></li>
            <?php endforeach; ?>
        </ol>
    </div>
    <?php
}

// Add checkout error message
add_action('woocommerce_checkout_process', 'auto_fail_custom_checkout_error');
function auto_fail_custom_checkout_error() {
	//change customer notice here
    wc_add_notice(__('Sorry, you cannot purchase this item yet.'), 'error');
}

// Log checkout attempts
add_action('woocommerce_before_checkout_form', 'auto_fail_custom_checkout_logging');
function auto_fail_custom_checkout_logging() {
    // Get the current timestamp
    $timestamp = current_time('mysql');

    // Get the cart items
    $cart_items = WC()->cart->get_cart();

    // Get the product names
    $product_names = array();
    foreach ($cart_items as $cart_item) {
        $product = $cart_item['data'];
        $product_name = $product->get_name();
        $product_names[] = $product_name;
    }
    $product_names = implode(',', $product_names);

    // Save the timestamp and product names to a text file
    $file_path = WP_CONTENT_DIR . '/checkout_log.txt';
    if (!file_exists($file_path)) {
        // Create the file if it doesn't exist
        file_put_contents($file_path, '');
    }
    $log_entry = sprintf('%s - %s', $timestamp, $product_names);
    $log_data = file_get_contents($file_path);
    $log_data .= $log_entry . "\n";
    file_put_contents($file_path, $log_data);
}