gistfile1.txt

	 /* This code is inside my class, in public static function init() -function */
	 
	 add_filter( 'woocommerce_shipping_methods', 'add_smartpost_shipping_method' );
		
		function add_smartpost_shipping_method( $methods ) {
		  $methods[] = 'Smartpost_shipping_method';
		  return $methods;
		}
		
		add_action( 'woocommerce_shipping_init', 'smartpost_shipping_method_init' );
		
		function smartpost_shipping_method_init(){
	
			require_once 'classes/Smartpost_shipping_method.php';
		}
		
		/* The shipping method's Class -code */
		
	<?php
    class Smartpost_shipping_method extends WC_Shipping_Method{
      public function __construct(){
            $this->id = 'smartpost_shipping_method';
            $this->method_title = __( 'Smartpost', 'woocommerce' );
            // Load the settings.
            $this->init_form_fields();
            $this->init_settings();
            // Define user set variables
            $this->enabled  = $this->get_option( 'enabled' );
            $this->title     = $this->get_option( 'title' );
            
            
            add_action( 'woocommerce_update_options_shipping_' . $this->id, array( $this, 'process_admin_options' ) );
        
      }
      public function init_form_fields(){
          $this->form_fields = array(
            'enabled' => array(
              'title'     => __( 'Enable/Disable', 'woocommerce' ),
              'type'       => 'checkbox',
              'label'     => __( 'Salli Smartpost -toimitustavan käyttö', 'woocommerce' ),
              'default'     => 'yes'
            ),
            'title' => array(
              'title'     => __( 'Method Title', 'woocommerce' ),
              'type'       => 'text',
              'description'   => __( 'This controls the title which the user sees during checkout.', 'woocommerce' ),
              'default'    => __( 'Smartposti', 'woocommerce' ),
              
            )
          );    
      }
      
      public function is_available( $package ){
          foreach ( $package['contents'] as $item_id => $values ) {
            $_product = $values['data'];
            $weight =  $_product->get_weight();
            if($weight > 10){
              return false;
            }
        }
        return true;
        
      }
        public function calculate_shipping($package){

            //get the total weight and dimensions
            $weight = 0;
            $dimensions = 0;
            foreach ( $package['contents'] as $item_id => $values ) {
              $_product  = $values['data'];
              $weight =  $weight + $_product->get_weight() * $values['quantity'];
              $dimensions = $dimensions + (($_product->length * $values['quantity']) * $_product->width * $_product->height);
              
            }
            
            $cost = 10;
            //calculate the cost according to the table
            switch ($weight) {
                case ($weight < 1):
                  switch ($dimensions) {  
                    case ($dimensions <= 1000):
                    $cost = 3;
                    break;
                    case ($dimensions > 1000):
                    $cost = 4;
                    break;
                  }
                 break;
                case ($weight >= 1 && $weight < 3 ):
                  switch ($dimensions) {  
                    case ($dimensions <= 3000):
                    $cost = 10;
                    break;
                  }
                break;
                case ($weight >= 3 && $weight < 10):
                  switch ($dimensions) {  
                    case ($dimensions <= 5000):
                    $cost = 25;
                    break;
                    case ($dimensions > 5000):
                    $cost = 50;
                    break;
                  }
                 break;
                
              }
            // send the final rate to the user. 
            $this->add_rate( array(
              'id'   => $this->id,
              'label' => $this->title,
              'cost'   => $cost
            ));
        
        }
    }
?>