/**
  * Create a order.
  *
  * @since 2.4
  *
  * @return WC_Order Order object.
  */
 public static function create_order()
 {
     // Create product
     $product = WC_Helper_Product::create_simple_product();
     WC_Helper_Shipping::create_simple_flat_rate();
     $order_data = array('status' => 'pending', 'customer_id' => 1, 'customer_note' => '', 'total' => '');
     $_SERVER['REMOTE_ADDR'] = '127.0.0.1';
     // Required, else wc_create_order throws an exception
     $order = wc_create_order($order_data);
     // Add order products
     $item_id = $order->add_product($product, 4);
     // Set billing address
     $billing_address = array('country' => 'US', 'first_name' => 'Jeroen', 'last_name' => 'Sormani', 'company' => 'WooCompany', 'address_1' => 'WooAddress', 'address_2' => '', 'postcode' => '123456', 'city' => 'WooCity', 'state' => 'NY', 'email' => '[email protected]', 'phone' => '555-32123');
     $order->set_address($billing_address, 'billing');
     // Add shipping costs
     $shipping_taxes = WC_Tax::calc_shipping_tax('10', WC_Tax::get_shipping_tax_rates());
     $order->add_shipping(new WC_Shipping_Rate('flat_rate_shipping', 'Flat rate shipping', '10', $shipping_taxes, 'flat_rate'));
     // Set payment gateway
     $payment_gateways = WC()->payment_gateways->payment_gateways();
     $order->set_payment_method($payment_gateways['bacs']);
     // Set totals
     $order->set_total(10, 'shipping');
     $order->set_total(0, 'cart_discount');
     $order->set_total(0, 'cart_discount_tax');
     $order->set_total(0, 'tax');
     $order->set_total(0, 'shipping_tax');
     $order->set_total(40, 'total');
     // 4 x $10 simple helper product
     return wc_get_order($order->id);
 }

 /**
  * Create a order.
  *
  * @since 2.4
  *
  * @return WC_Order Order object.
  */
 public static function create_order($customer_id = 1)
 {
     // Create product
     $product = WC_Helper_Product::create_simple_product();
     WC_Helper_Shipping::create_simple_flat_rate();
     $order_data = array('status' => 'pending', 'customer_id' => $customer_id, 'customer_note' => '', 'total' => '');
     $_SERVER['REMOTE_ADDR'] = '127.0.0.1';
     // Required, else wc_create_order throws an exception
     $order = wc_create_order($order_data);
     // Add order products
     $order->add_product($product, 4);
     // Set billing address
     $order->set_billing_first_name('Jeroen');
     $order->set_billing_last_name('Sormani');
     $order->set_billing_company('WooCompany');
     $order->set_billing_address_1('WooAddress');
     $order->set_billing_address_2('');
     $order->set_billing_city('WooCity');
     $order->set_billing_state('NY');
     $order->set_billing_postcode('123456');
     $order->set_billing_country('US');
     $order->set_billing_email('[email protected]');
     $order->set_billing_phone('555-32123');
     // Add shipping costs
     $shipping_taxes = WC_Tax::calc_shipping_tax('10', WC_Tax::get_shipping_tax_rates());
     $rate = new WC_Shipping_Rate('flat_rate_shipping', 'Flat rate shipping', '10', $shipping_taxes, 'flat_rate');
     $item = new WC_Order_Item_Shipping();
     $item->set_props(array('method_title' => $rate->label, 'method_id' => $rate->id, 'total' => wc_format_decimal($rate->cost), 'taxes' => $rate->taxes, 'meta_data' => $rate->get_meta_data()));
     $order->add_item($item);
     // Set payment gateway
     $payment_gateways = WC()->payment_gateways->payment_gateways();
     $order->set_payment_method($payment_gateways['bacs']);
     // Set totals
     $order->set_shipping_total(10);
     $order->set_discount_total(0);
     $order->set_discount_tax(0);
     $order->set_cart_tax(0);
     $order->set_shipping_tax(0);
     $order->set_total(40);
     // 4 x $10 simple helper product
     $order->save();
     return $order;
 }

 /**
  * Calculate shipping when this method is used standalone.
  */
 public function calculate_shipping($package)
 {
     $_tax = new WC_Tax();
     $taxes = array();
     $shipping_cost = 0;
     // This shipping method loops through products, adding up the cost
     if (sizeof($package['contents']) > 0) {
         foreach ($package['contents'] as $item_id => $values) {
             if ($values['quantity'] > 0) {
                 if ($values['data']->needs_shipping()) {
                     $rule = false;
                     $item_shipping_cost = 0;
                     if ($values['variation_id']) {
                         $rule = woocommerce_per_product_shipping_get_matching_rule($values['variation_id'], $package);
                     }
                     if ($rule === false) {
                         $rule = woocommerce_per_product_shipping_get_matching_rule($values['product_id'], $package);
                     }
                     if ($rule) {
                         $item_shipping_cost += $rule->rule_item_cost * $values['quantity'];
                         $item_shipping_cost += $rule->rule_cost;
                     } elseif ($this->cost === '0' || $this->cost > 0) {
                         // Use default
                         $item_shipping_cost += $this->cost * $values['quantity'];
                     } else {
                         // NO default and nothing found - abort
                         return;
                     }
                     // Fee
                     $item_shipping_cost += $this->get_fee($this->fee, $item_shipping_cost) * $values['quantity'];
                     $shipping_cost += $item_shipping_cost;
                     if (get_option('woocommerce_calc_taxes') == 'yes' && $this->tax_status == 'taxable') {
                         $rates = $_tax->get_shipping_tax_rates($values['data']->get_tax_class());
                         $item_taxes = $_tax->calc_shipping_tax($item_shipping_cost, $rates);
                         // Sum the item taxes
                         foreach (array_keys($taxes + $item_taxes) as $key) {
                             $taxes[$key] = (isset($item_taxes[$key]) ? $item_taxes[$key] : 0) + (isset($taxes[$key]) ? $taxes[$key] : 0);
                         }
                     }
                 }
             }
         }
     }
     // Add order shipping cost + tax
     if ($this->order_fee) {
         $order_fee = $this->get_fee($this->order_fee, $shipping_cost);
         $shipping_cost += $order_fee;
         if (get_option('woocommerce_calc_taxes') == 'yes' && $this->tax_status == 'taxable') {
             $rates = $_tax->get_shipping_tax_rates();
             $item_taxes = $_tax->calc_shipping_tax($order_fee, $rates);
             // Sum the item taxes
             foreach (array_keys($taxes + $item_taxes) as $key) {
                 $taxes[$key] = (isset($item_taxes[$key]) ? $item_taxes[$key] : 0) + (isset($taxes[$key]) ? $taxes[$key] : 0);
             }
         }
     }
     // Add rate
     $this->add_rate(array('id' => $this->id, 'label' => $this->title, 'cost' => $shipping_cost, 'taxes' => $taxes));
 }

 /**
  * Add a rate
  *
  * Add a shipping rate. If taxes are not set they will be calculated based on cost.
  *
  * @access public
  * @param array $args (default: array())
  * @return void
  */
 function add_rate($args = array())
 {
     global $woocommerce;
     $defaults = array('id' => '', 'label' => '', 'cost' => '0', 'taxes' => '', 'calc_tax' => 'per_order');
     $args = wp_parse_args($args, $defaults);
     extract($args);
     // Id and label are required
     if (!$id || !$label) {
         return;
     }
     // Handle cost
     $total_cost = is_array($cost) ? array_sum($cost) : $cost;
     // Taxes - if not an array and not set to false, calc tax based on cost and passed calc_tax variable
     // This saves shipping methods having to do complex tax calculations
     if (!is_array($taxes) && $taxes !== false && $total_cost > 0 && get_option('woocommerce_calc_taxes') == 'yes' && $this->tax_status == 'taxable') {
         $_tax = new WC_Tax();
         $taxes = array();
         switch ($calc_tax) {
             case "per_item":
                 // If we have an array of costs we can look up each items tax class and add tax accordingly
                 if (is_array($cost)) {
                     $cart = $woocommerce->cart->get_cart();
                     foreach ($cost as $cost_key => $amount) {
                         if (!isset($cart[$cost_key])) {
                             continue;
                         }
                         $_product = $cart[$cost_key]['data'];
                         $rates = $_tax->get_shipping_tax_rates($_product->get_tax_class());
                         $item_taxes = $_tax->calc_shipping_tax($amount, $rates);
                         // Sum the item taxes
                         foreach (array_keys($taxes + $item_taxes) as $key) {
                             $taxes[$key] = (isset($item_taxes[$key]) ? $item_taxes[$key] : 0) + (isset($taxes[$key]) ? $taxes[$key] : 0);
                         }
                     }
                     // Add any cost for the order - order costs are in the key 'order'
                     if (isset($cost['order'])) {
                         $rates = $_tax->get_shipping_tax_rates();
                         $item_taxes = $_tax->calc_shipping_tax($cost['order'], $rates);
                         // Sum the item taxes
                         foreach (array_keys($taxes + $item_taxes) as $key) {
                             $taxes[$key] = (isset($item_taxes[$key]) ? $item_taxes[$key] : 0) + (isset($taxes[$key]) ? $taxes[$key] : 0);
                         }
                     }
                 }
                 break;
             default:
                 $rates = $_tax->get_shipping_tax_rates();
                 $taxes = $_tax->calc_shipping_tax($total_cost, $rates);
                 break;
         }
     }
     $this->rates[] = new WC_Shipping_Rate($id, $label, $total_cost, $taxes, $this->id);
 }

 /**
  * Gets order total - formatted for display.
  *
  * @return string
  */
 public function get_formatted_order_total($tax_display = '', $display_refunded = true)
 {
     $formatted_total = wc_price($this->get_total(), array('currency' => $this->get_order_currency()));
     $order_total = $this->get_total();
     $total_refunded = $this->get_total_refunded();
     $tax_string = '';
     // Tax for inclusive prices
     if (wc_tax_enabled() && 'incl' == $tax_display) {
         $tax_string_array = array();
         if ('itemized' == get_option('woocommerce_tax_total_display')) {
             foreach ($this->get_tax_totals() as $code => $tax) {
                 $tax_amount = $total_refunded && $display_refunded ? wc_price(WC_Tax::round($tax->amount - $this->get_total_tax_refunded_by_rate_id($tax->rate_id)), array('currency' => $this->get_order_currency())) : $tax->formatted_amount;
                 $tax_string_array[] = sprintf('%s %s', $tax_amount, $tax->label);
             }
         } else {
             $tax_amount = $total_refunded && $display_refunded ? $this->get_total_tax() - $this->get_total_tax_refunded() : $this->get_total_tax();
             $tax_string_array[] = sprintf('%s %s', wc_price($tax_amount, array('currency' => $this->get_order_currency())), WC()->countries->tax_or_vat());
         }
         if (!empty($tax_string_array)) {
             $tax_string = ' ' . sprintf(__('(Includes %s)', 'woocommerce'), implode(', ', $tax_string_array));
         }
     }
     if ($total_refunded && $display_refunded) {
         $formatted_total = '<del>' . strip_tags($formatted_total) . '</del> <ins>' . wc_price($order_total - $total_refunded, array('currency' => $this->get_order_currency())) . $tax_string . '</ins>';
     } else {
         $formatted_total .= $tax_string;
     }
     return apply_filters('woocommerce_get_formatted_order_total', $formatted_total, $this);
 }

 /**
  * Set tax class.
  *
  * @param string $value
  * @throws WC_Data_Exception
  */
 public function set_tax_class($value)
 {
     if ($value && !in_array($value, WC_Tax::get_tax_classes())) {
         $this->error('order_item_fee_invalid_tax_class', __('Invalid tax class', 'woocommerce'));
     }
     $this->set_prop('tax_class', $value);
 }

 /**
  * Whenever a WooCommerce tax rate is saved, also save the tax rate's hidden status.
  *
  * Executed whenever a WooCommerce tax rate is added, updated or deleted.
  *
  * @param int $tax_rate_id The WooCommerce Tax Rate ID.
  */
 public function save_tax_rate_hidden_status()
 {
     // nonce and cap checks are copied from WC_AJAX::tax_rates_save_changes()
     // Use return instead of exit so that WooCommerce core will handle the AJAX error messages
     if (!isset($_POST['wc_tax_nonce'], $_POST['changes'])) {
         return;
     }
     $current_class = !empty($_POST['current_class']) ? $_POST['current_class'] : '';
     // This is sanitized seven lines later.
     if (!wp_verify_nonce($_POST['wc_tax_nonce'], 'wc_tax_nonce-class:' . $current_class)) {
         return;
     }
     // Check User Caps
     if (!current_user_can('manage_woocommerce')) {
         return;
     }
     $hidden_rates = array();
     $current_class = WC_Tax::format_tax_rate_class($current_class);
     $rates = WC_Tax::get_rates_for_tax_class($current_class);
     foreach ($rates as $tax_rate_id => $rate) {
         if (isset($_POST['tax_rate_hidden'][$tax_rate_id])) {
             // @codingStandardsIgnoreEnd
             $hidden_rates[$tax_rate_id] = true;
         } else {
             if (isset($hidden_rates[$tax_rate_id])) {
                 unset($hidden_rates[$tax_rate_id]);
             }
         }
     }
     wc_hidden_taxes()->set_option('hidden_rates', $hidden_rates);
 }

 /**
  * Test some discount logic which has caused issues in the past.
  * Tickets:
  * 	https://github.com/woothemes/woocommerce/issues/10573
  *  https://github.com/woothemes/woocommerce/issues/10963
  *
  * Due to discounts being split amongst products in cart.
  */
 public function test_cart_get_discounted_price()
 {
     global $wpdb;
     // We need this to have the calculate_totals() method calculate totals
     if (!defined('WOOCOMMERCE_CHECKOUT')) {
         define('WOOCOMMERCE_CHECKOUT', true);
     }
     # Test case 1 #10963
     // Create dummy coupon - fixed cart, 1 value
     $coupon = WC_Helper_Coupon::create_coupon();
     // Add coupon
     WC()->cart->add_discount($coupon->code);
     // Create dummy product - price will be 10
     $product = WC_Helper_Product::create_simple_product();
     // Add product to cart x1, calc and test
     WC()->cart->add_to_cart($product->id, 1);
     WC()->cart->calculate_totals();
     $this->assertEquals('9.00', number_format(WC()->cart->total, 2, '.', ''));
     $this->assertEquals('1.00', number_format(WC()->cart->discount_cart, 2, '.', ''));
     // Add product to cart x2, calc and test
     WC()->cart->add_to_cart($product->id, 1);
     WC()->cart->calculate_totals();
     $this->assertEquals('19.00', number_format(WC()->cart->total, 2, '.', ''));
     $this->assertEquals('1.00', number_format(WC()->cart->discount_cart, 2, '.', ''));
     // Add product to cart x3, calc and test
     WC()->cart->add_to_cart($product->id, 1);
     WC()->cart->calculate_totals();
     $this->assertEquals('29.00', number_format(WC()->cart->total, 2, '.', ''));
     $this->assertEquals('1.00', number_format(WC()->cart->discount_cart, 2, '.', ''));
     // Clean up the cart
     WC()->cart->empty_cart();
     WC()->cart->remove_coupons();
     # Test case 2 #10573
     update_post_meta($product->id, '_regular_price', '29.95');
     update_post_meta($product->id, '_price', '29.95');
     update_post_meta($coupon->id, 'discount_type', 'percent');
     update_post_meta($coupon->id, 'coupon_amount', '10');
     update_option('woocommerce_prices_include_tax', 'yes');
     update_option('woocommerce_calc_taxes', 'yes');
     $tax_rate = array('tax_rate_country' => '', 'tax_rate_state' => '', 'tax_rate' => '10.0000', 'tax_rate_name' => 'TAX', 'tax_rate_priority' => '1', 'tax_rate_compound' => '0', 'tax_rate_shipping' => '1', 'tax_rate_order' => '1', 'tax_rate_class' => '');
     WC_Tax::_insert_tax_rate($tax_rate);
     $product = wc_get_product($product->id);
     WC()->cart->add_to_cart($product->id, 1);
     WC()->cart->add_discount($coupon->code);
     WC()->cart->calculate_totals();
     $cart_item = current(WC()->cart->get_cart());
     $this->assertEquals('24.51', number_format($cart_item['line_total'], 2, '.', ''));
     // Cleanup
     $wpdb->query("DELETE FROM {$wpdb->prefix}woocommerce_tax_rates");
     $wpdb->query("DELETE FROM {$wpdb->prefix}woocommerce_tax_rate_locations");
     WC()->cart->empty_cart();
     WC()->cart->remove_coupons();
     update_option('woocommerce_prices_include_tax', 'no');
     update_option('woocommerce_calc_taxes', 'no');
     // Delete coupon
     WC_Helper_Coupon::delete_coupon($coupon->id);
     // Clean up product
     WC_Helper_Product::delete_product($product->id);
 }

 function ywev_get_tax_classes()
 {
     if (version_compare(WOOCOMMERCE_VERSION, '2.3', '<')) {
         return array_filter(array_map('trim', explode("\n", get_option('woocommerce_tax_classes'))));
     } else {
         return WC_Tax::get_tax_classes();
     }
 }

 public function set_base_tax_rates($rates, $tax_class)
 {
     $location = WC_Tax::get_tax_location($tax_class);
     if (in_array($tax_class, array('virtual-rate', 'virtual-reduced-rate')) && isset($location[0]) && sizeof($location) === 4 && $location[0] !== WC()->countries->get_base_country()) {
         list($country, $state, $postcode, $city) = $location;
         $rates = WC_Tax::find_rates(array('country' => $country, 'state' => $state, 'postcode' => $postcode, 'city' => $city, 'tax_class' => $tax_class));
     }
     return $rates;
 }

    /**
     * Output widget.
     *
     * @see WP_Widget
     *
     * @param array $args
     * @param array $instance
     */
    public function widget($args, $instance)
    {
        global $wp, $wp_the_query;
        if (!is_post_type_archive('product') && !is_tax(get_object_taxonomies('product'))) {
            return;
        }
        if (!$wp_the_query->post_count) {
            return;
        }
        $min_price = isset($_GET['min_price']) ? esc_attr($_GET['min_price']) : '';
        $max_price = isset($_GET['max_price']) ? esc_attr($_GET['max_price']) : '';
        wp_enqueue_script('wc-price-slider');
        // Find min and max price in current result set
        $prices = $this->get_filtered_price();
        $min = floor($prices->min_price);
        $max = ceil($prices->max_price);
        if ($min === $max) {
            return;
        }
        $this->widget_start($args, $instance);
        if ('' === get_option('permalink_structure')) {
            $form_action = remove_query_arg(array('page', 'paged'), add_query_arg($wp->query_string, '', home_url($wp->request)));
        } else {
            $form_action = preg_replace('%\\/page/[0-9]+%', '', home_url(trailingslashit($wp->request)));
        }
        /**
         * Adjust max if the store taxes are not displayed how they are stored.
         * Min is left alone because the product may not be taxable.
         * Kicks in when prices excluding tax are displayed including tax.
         */
        if (wc_tax_enabled() && 'incl' === get_option('woocommerce_tax_display_shop') && !wc_prices_include_tax()) {
            $tax_classes = array_merge(array(''), WC_Tax::get_tax_classes());
            $class_max = $max;
            foreach ($tax_classes as $tax_class) {
                if ($tax_rates = WC_Tax::get_rates($tax_class)) {
                    $class_max = $max + WC_Tax::get_tax_total(WC_Tax::calc_exclusive_tax($max, $tax_rates));
                }
            }
            $max = $class_max;
        }
        echo '<form method="get" action="' . esc_url($form_action) . '">
			<div class="price_slider_wrapper">
				<div class="price_slider" style="display:none;"></div>
				<div class="price_slider_amount">
					<input type="text" id="min_price" name="min_price" value="' . esc_attr($min_price) . '" data-min="' . esc_attr(apply_filters('woocommerce_price_filter_widget_min_amount', $min)) . '" placeholder="' . esc_attr__('Min price', 'woocommerce') . '" />
					<input type="text" id="max_price" name="max_price" value="' . esc_attr($max_price) . '" data-max="' . esc_attr(apply_filters('woocommerce_price_filter_widget_max_amount', $max)) . '" placeholder="' . esc_attr__('Max price', 'woocommerce') . '" />
					<button type="submit" class="button">' . __('Filter', 'woocommerce') . '</button>
					<div class="price_label" style="display:none;">
						' . __('Price:', 'woocommerce') . ' <span class="from"></span> &mdash; <span class="to"></span>
					</div>
					' . wc_query_string_form_fields(null, array('min_price', 'max_price'), '', true) . '
					<div class="clear"></div>
				</div>
			</div>
		</form>';
        $this->widget_end($args);
    }

 public static function woocommerce_get_price($price, $product)
 {
     global $post, $woocommerce;
     $baseprice = $price;
     $result = $baseprice;
     if ($post == null || !is_admin()) {
         if ($product->is_type('variation')) {
             $commission = WRP_Variations_Admin::get_commission($product, $product->variation_id);
         } else {
             $commission = self::get_commission($product);
         }
         if ($commission) {
             $baseprice = $product->get_regular_price();
             if ($product->get_sale_price() != $product->get_regular_price() && $product->get_sale_price() == $product->price) {
                 if (get_option("wrp-baseprice", "regular") == "sale") {
                     $baseprice = $product->get_sale_price();
                 }
             }
             $product_price = $baseprice;
             $type = get_option("wrp-method", "rate");
             $result = 0;
             if ($type == "rate") {
                 // if rate and price includes taxes
                 if ($product->is_taxable() && get_option('woocommerce_prices_include_tax') == 'yes') {
                     $_tax = new WC_Tax();
                     $tax_rates = $_tax->get_shop_base_rate($product->tax_class);
                     $taxes = $_tax->calc_tax($baseprice, $tax_rates, true);
                     $product_price = $_tax->round($baseprice - array_sum($taxes));
                 }
                 $result = self::bcmul($product_price, $commission, WOO_ROLE_PRICING_DECIMALS);
                 if ($product->is_taxable() && get_option('woocommerce_prices_include_tax') == 'yes') {
                     $_tax = new WC_Tax();
                     $tax_rates = $_tax->get_shop_base_rate($product->tax_class);
                     $taxes = $_tax->calc_tax($result, $tax_rates, false);
                     // important false
                     $result = $_tax->round($result + array_sum($taxes));
                 }
             } else {
                 $result = self::bcsub($product_price, $commission, WOO_ROLE_PRICING_DECIMALS);
             }
         }
     }
     return $result;
 }

 public function tax_classes()
 {
     $tax_classes = WC_Tax::get_tax_classes();
     $classes_options = array();
     if (!empty($tax_classes)) {
         foreach ($tax_classes as $class) {
             $classes_options[sanitize_title($class)] = esc_html($class);
         }
     }
     return $classes_options;
 }

 /**
  * Returns base tax rates for all tax classes
  * @return array
  */
 public static function tax_rates()
 {
     $rates = array();
     foreach (self::tax_classes() as $class => $label) {
         if ($rate = WC_Tax::get_base_tax_rates($class)) {
             // WC_Tax returns a assoc array with int as keys = world of pain in js
             // possibly change $key to $rate['id']
             $rates[$class] = $rate;
         }
     }
     return $rates;
 }

 public static function woocommerce_get_price($price, $product)
 {
     global $post, $woocommerce;
     $baseprice = $price;
     $result = $baseprice;
     if ($post == null || !is_admin()) {
         $roleprice = self::get_role_price($product);
         if (empty($roleprice)) {
             $regularprice = $product->get_regular_price();
             if (!empty($regularprice)) {
                 $baseprice = $regularprice;
             }
             if ($product->get_sale_price() != $product->get_regular_price() && $product->get_sale_price() == $product->price) {
                 if (get_option("wrp-baseprice", "regular") == "sale") {
                     $baseprice = $product->get_sale_price();
                 }
             }
             $product_price = $baseprice;
         } else {
             $baseprice = $roleprice;
             $product_price = $roleprice;
         }
         $result = 0;
         if ($product->is_taxable() && get_option('woocommerce_prices_include_tax') == 'yes') {
             $_tax = new WC_Tax();
             $tax_rates = $_tax->get_shop_base_rate($product->tax_class);
             $taxes = $_tax->calc_tax($baseprice, $tax_rates, true);
             $product_price = $_tax->round($baseprice - array_sum($taxes));
         }
         $result = $product_price;
         if ($product->is_taxable() && get_option('woocommerce_prices_include_tax') == 'yes') {
             $_tax = new WC_Tax();
             $tax_rates = $_tax->get_shop_base_rate($product->tax_class);
             $taxes = $_tax->calc_tax($result, $tax_rates, false);
             // important false
             $result = $_tax->round($result + array_sum($taxes));
         }
     }
     return $result;
 }

 /**
  * calculate_shipping function.
  *
  * @access public
  *
  * @param mixed $package
  *
  * @return void
  */
 public function calculate_shipping($package)
 {
     $products = $package['contents'];
     $destination_country = isset($package['destination']['country']) ? $package['destination']['country'] : '';
     $destination_state = isset($package['destination']['state']) ? $package['destination']['state'] : '';
     $amount = 0.0;
     if ($products) {
         $amount = $this->calculate_per_seller($products, $destination_country, $destination_state);
     }
     $tax_rate = $this->tax_status == 'none' ? false : '';
     if ($tax_rate === '') {
         $rates = WC_Tax::get_shipping_tax_rates();
         $taxRate = reset($rates);
         $taxkey = key($rates);
         $tax_rates = array();
         $shippingTaxes = 0;
         $price = $this->calculate_per_seller_prices($products, $destination_country, $destination_state);
         //var_dump($price);
         // var_dump($rates);
         if (!empty($price)) {
             foreach ($price as $seller_id => $value) {
                 //TODO: Check if taxxing from same state;
                 //var_dump($_product->post->post_author);
                 $country_obj = new WC_Countries();
                 $countries = $country_obj->countries;
                 $states = $country_obj->states;
                 $selleraddress = dokan_get_seller_address($seller_id, true);
                 $sellerState = $selleraddress['state'];
                 $stateCode = array_search(ucfirst(strtolower($sellerState)), $states['US']);
                 if ($stateCode !== false) {
                     $sellerState = $stateCode;
                 }
                 $location = WC()->customer->get_taxable_address();
                 $buyerState = $location[1];
                 if ($buyerState == $sellerState) {
                     $shippingCost = array_sum($value['addition_price']) + $value['default'] + array_sum($value['qty']) + $value['add_product'] + (isset($value['state_rates']) ? $value['state_rates'] : 0);
                     $shippingTaxes += $shippingCost * $taxRate['rate'] / 100;
                     //var_dump($shippingCost, $taxRate);
                 }
             }
         }
         $tax_rate[$taxkey] = $shippingTaxes;
         //var_dump($tax_rate);
     }
     $rate = array('id' => $this->id, 'label' => $this->title, 'cost' => $amount, 'taxes' => $tax_rate);
     // Register the rate
     $this->add_rate($rate);
 }

 /**
  * add_eu_countries_vat_rates.
  *
  * @version 2.3.10
  * @since   2.3.10
  */
 function add_eu_countries_vat_rates()
 {
     if (!isset($_POST['add_eu_countries_vat_rates'])) {
         return;
     }
     if (!is_super_admin() && !is_shop_manager()) {
         return;
     }
     $loop = 0;
     foreach (wcj_get_european_union_countries_with_vat() as $country => $rate) {
         $tax_rate = array('tax_rate_country' => $country, 'tax_rate' => $rate, 'tax_rate_name' => isset($_POST['wcj_tax_name']) ? $_POST['wcj_tax_name'] : __('VAT', 'woocommerce'), 'tax_rate_priority' => 1, 'tax_rate_compound' => 0, 'tax_rate_shipping' => 1, 'tax_rate_order' => $loop++, 'tax_rate_class' => '');
         $tax_rate_id = WC_Tax::_insert_tax_rate($tax_rate);
         WC_Tax::_update_tax_rate_postcodes($tax_rate_id, '');
         WC_Tax::_update_tax_rate_cities($tax_rate_id, '');
     }
 }

 public function install_standard_rates()
 {
     //  delete previous inserted standard rates
     $tax_rates = $this->get_tax_rates();
     foreach ($tax_rates as $tax_rate) {
         $tax_rate_name = sprintf("EU VAT (%s)", $tax_rate->tax_rate_country);
         if (0 == strpos($tax_rate->tax_rate_name, $tax_rate_name)) {
             WC_Tax::_delete_tax_rate($tax_rate->tax_rate_id);
         }
     }
     foreach ($this->tax_rates_data as $key => $value) {
         $tax_rate = array('tax_rate_country' => $key, 'tax_rate_state' => '*', 'tax_rate' => $value["standard_rate"], 'tax_rate_name' => sprintf("EU VAT (%s) %s%%", $key, $value["standard_rate"]), 'tax_rate_priority' => 1, 'tax_rate_compound' => 1, 'tax_rate_shipping' => 1, 'tax_rate_class' => '');
         $tax_rate_id = WC_Tax::_insert_tax_rate($tax_rate);
         WC_Tax::_update_tax_rate_postcodes($tax_rate_id, wc_clean('*'));
         WC_Tax::_update_tax_rate_cities($tax_rate_id, wc_clean('*'));
     }
 }

 /**
  * copy of import function: WC_Tax_Rate_Importer->import()
  * https://github.com/woothemes/woocommerce/blob/master/includes/admin/importers/class-wc-tax-rate-importer.php
  */
 private function import_dummy_tax()
 {
     // clear tax rate tables
     global $wpdb;
     $wpdb->query("TRUNCATE TABLE {$wpdb->prefix}woocommerce_tax_rates");
     $wpdb->query("TRUNCATE TABLE {$wpdb->prefix}woocommerce_tax_rate_locations");
     $file = WC_POS_PLUGIN_PATH . 'tests/data/sample_tax_rates.csv';
     $delimiter = ',';
     $loop = 0;
     if (($handle = fopen($file, "r")) !== false) {
         $header = fgetcsv($handle, 0, $delimiter);
         if (10 === sizeof($header)) {
             while (($row = fgetcsv($handle, 0, $delimiter)) !== false) {
                 list($country, $state, $postcode, $city, $rate, $name, $priority, $compound, $shipping, $class) = $row;
                 $tax_rate = array('tax_rate_country' => $country, 'tax_rate_state' => $state, 'tax_rate' => $rate, 'tax_rate_name' => $name, 'tax_rate_priority' => $priority, 'tax_rate_compound' => $compound ? 1 : 0, 'tax_rate_shipping' => $shipping ? 1 : 0, 'tax_rate_order' => $loop++, 'tax_rate_class' => $class);
                 $tax_rate_id = WC_Tax::_insert_tax_rate($tax_rate);
                 WC_Tax::_update_tax_rate_postcodes($tax_rate_id, wc_clean($postcode));
                 WC_Tax::_update_tax_rate_cities($tax_rate_id, wc_clean($city));
             }
         }
         fclose($handle);
     }
 }

 private function calc_tax_rate($product)
 {
     static $tax_rates = array();
     $item_tax_rates = array();
     $compound_tax_rates = 0;
     $regular_tax_rates = 0;
     if (empty($tax_rates[$product->get_tax_class()])) {
         $tax_rates[$product->get_tax_class()] = WC_Tax::get_rates($product->get_tax_class());
     }
     $item_tax_rates = $tax_rates[$product->get_tax_class()];
     $regular_tax_rates = $compound_tax_rates = 0;
     foreach ($item_tax_rates as $key => $rate) {
         if ($rate['compound'] == 'yes') {
             $compound_tax_rates = $compound_tax_rates + $rate['rate'];
         } else {
             $regular_tax_rates = $regular_tax_rates + $rate['rate'];
         }
     }
     $regular_tax_rate = 1 + $regular_tax_rates / 100;
     $compound_tax_rate = 1 + $compound_tax_rates / 100;
     $the_rate = 0;
     foreach ($item_tax_rates as $key => $rate) {
         if (!isset($taxes[$key])) {
             $taxes[$key] = 0;
         }
         $the_rate = $rate['rate'];
         // 100;
         if ($rate['compound'] == 'yes') {
             //$the_price = $price;
             //    $the_rate  = $the_rate / $compound_tax_rate;
         } else {
             //$the_price = $non_compound_price;
             //    $the_rate  = $the_rate / $regular_tax_rate;
         }
     }
     return $the_rate;
 }