Per Product ship method

// Make sure WooCommerce is active
if ( in_array( 'woocommerce/woocommerce.php', apply_filters( 'active_plugins', get_option( 'active_plugins' ) ) ) ) {

    class WC_Per_Product extends WC_Shipping_Method {

        // construct function.
        function __construct() {
            $this->id           = 'per_product';
            $this->method_title = __( 'Price Per Product', 'woocommerce' );
            $this->init();
        }

        // run on init
        function init() {

            // load settings
            $this->init_form_fields();
            $this->init_settings();

            // define variables
            $this->title        = $this->get_option( 'title' );
            $this->minfee       = $this->get_option( 'minfee' );
            $this->fee          = $this->get_option( 'fee' );
            $this->codes        = $this->get_option( 'codes' );
            $this->availability = $this->get_option( 'availability' );
            $this->countries    = $this->get_option( 'countries' );

            add_action( 'woocommerce_update_options_shipping_' . $this->id, array( $this, 'process_admin_options' ) );
        } // end of init

        function init_form_fields() {
            global $woocommerce;

            $this->form_fields = array(
                'enabled' => array(
                    'title'         => __( 'Enable', 'woocommerce' ),
                    'type'          => 'checkbox',
                    'label'         => __( 'Enable Per Product Method', 'woocommerce' ),
                    'default'       => 'no'
                ),
                'title' => array(
                    'title'         => __( 'Title', 'woocommerce' ),
                    'type'          => 'text',
                    'description'   => __( 'This controls the title which the user sees during checkout.', 'woocommerce' ),
                    'default'       => __( 'Per Product', 'woocommerce' ),
                    'desc_tip'      => true,
                ),
                'minfee' => array(
                    'title'         => __( 'Delivery Fee for Single product', 'woocommerce' ),
                    'type'          => 'number',
                    'custom_attributes' => array(
                        'step'  => 'any',
                        'min'   => '0'
                    ),
                    'description'   => __( 'What fee do you want to charge for just one product. Leave blank to disable, 0 to for free.', 'woocommerce' ),
                    'default'       => '',
                    'desc_tip'      => true,
                    'placeholder'   => '0.00'
                ),
                'fee' => array(
                    'title'         => __( 'Delivery Fee', 'woocommerce' ),
                    'type'          => 'number',
                    'custom_attributes' => array(
                        'step'  => 'any',
                        'min'   => '0'
                    ),
                    'description'   => __( 'What fee do you want to charge for local delivery, disregarded if you choose free. Leave blank to disable.', 'woocommerce' ),
                    'default'       => '',
                    'desc_tip'      => true,
                    'placeholder'   => '0.00'
                ),
                'codes' => array(
                    'title'         => __( 'Zip/Post Codes', 'woocommerce' ),
                    'type'          => 'textarea',
                    'description'   => __( 'What zip/post codes would you like to offer delivery to? Separate codes with a comma. Accepts wildcards, e.g. P* will match a postcode of PE30.', 'woocommerce' ),
                    'default'       => '',
                    'desc_tip'      => true,
                    'placeholder'   => '12345, 56789 etc'
                ),
                'availability' => array(
                                'title'         => __( 'Method availability', 'woocommerce' ),
                                'type'          => 'select',
                                'default'       => 'all',
                                'class'         => 'availability',
                                'options'       => array(
                                    'all'       => __( 'All allowed countries', 'woocommerce' ),
                                    'specific'  => __( 'Specific Countries', 'woocommerce' )
                                )
                ),
                'countries' => array(
                                'title'         => __( 'Specific Countries', 'woocommerce' ),
                                'type'          => 'multiselect',
                                'class'         => 'chosen_select',
                                'css'           => 'width: 450px;',
                                'default'       => '',
                                'options'       => $woocommerce->countries->countries
                            )
                );
        } // end of forms init

        // show admin options
        function admin_options() {
            global $woocommerce; ?>

            <h3><?php echo $this->method_title; ?></h3>
            <p><?php _e( 'Per product is a method to set a price per product for delivery.', 'woocommerce' ); ?></p>
            <table class="form-table">
                <?php $this->generate_settings_html(); ?>
            </table>

            <?php
        }

        // calculate shipping cost
        function calculate_shipping( $package = array() ) {
            global $woocommerce;

            $shipping_total = 0;
            $fee = ( trim( $this->fee ) == '' ) ? 0 : $this->fee;

            $total_items = sprintf(_n('%d', '%d', $woocommerce->cart->cart_contents_count, 'woothemes'), $woocommerce->cart->cart_contents_count);

            //print "This many: ".$total_items;

            if ( $total_items > 1 ) {
                $shipping_total += $this->fee * $total_items;
            }
            else {
                $shipping_total += $this->minfee;
            }

            /*
            foreach ( $woocommerce->cart->get_cart() as $item_id => $values ) {
                $_product = $values['data'];;

                //print "Come on ".$values['quantity'];

                // if any proucts at all
                if ( $values['quantity'] > 0 && $_product->needs_shipping() ) {
                    // if there's only one product, use minfee
                    if ( $values['quantity'] == 1 ) {
                        $shipping_total += $this->minfee;
                    }
                    // if there are more, use the default fee
                    else {
                        $shipping_total += $this->fee * $values['quantity'];
                    }
                }
            } */

            $rate = array(
                'id'        => $this->id,
                'label'     => $this->title,
                'cost'      => $shipping_total
            );

            $this->add_rate($rate);
        } //end of shipping calc

            function is_available( $package ) {
                global $woocommerce;

                if ($this->enabled=="no") return false;

                // If post codes are listed, let's use them.
                $codes = '';
                if ( $this->codes != '' ) {
                    foreach( explode( ',', $this->codes ) as $code ) {
                        $codes[] = $this->clean( $code );
                    }
                }

                if ( is_array( $codes ) ) {

                    $found_match = false;

                    if ( in_array( $this->clean( $package['destination']['postcode'] ), $codes ) )
                        $found_match = true;

                    // Wildcard search
                    if ( ! $found_match ) {

                        $customer_postcode = $this->clean( $package['destination']['postcode'] );
                        $customer_postcode_length = strlen( $customer_postcode );

                        for ( $i = 0; $i <= $customer_postcode_length; $i++ ) {

                            if ( in_array( $customer_postcode, $codes ) )
                                $found_match = true;

                            $customer_postcode = substr( $customer_postcode, 0, -2 ) . '*';
                        }
                    }

                    if ( ! $found_match )
                        return false;
                }

                // Either post codes not setup, or post codes are in array... so lefts check countries for backwards compatibility.
                $ship_to_countries = '';
                if ($this->availability == 'specific') :
                    $ship_to_countries = $this->countries;
                else :
                    if (get_option('woocommerce_allowed_countries')=='specific') :
                        $ship_to_countries = get_option('woocommerce_specific_allowed_countries');
                    endif;
                endif;

                if (is_array($ship_to_countries))
                    if (!in_array( $package['destination']['country'] , $ship_to_countries))
                        return false;

                // Yay! We passed!
                return apply_filters( 'woocommerce_shipping_' . $this->id . '_is_available', true );
            }

            function clean( $code ) {
                return str_replace( '-', '', sanitize_title( $code ) ) . ( strstr( $code, '*' ) ? '*' : '' );
            }

    } // end of WooCommerce Class

    function add_per_product_method( $methods ) {
        $methods[] = 'WC_Per_Product'; return $methods;
    }

    add_filter('woocommerce_shipping_methods', 'add_per_product_method' );

} // end of if WooCmmerce is active