<?php
/*
  $Id: shipping.php 421 2006-02-08 17:53:17Z hpdl $

  osCommerce, Open Source E-Commerce Solutions
  http://www.oscommerce.com

  Copyright (c) 2006 osCommerce

  Released under the GNU General Public License
*/

  class osC_Shipping {
    var $_modules = array(),
        $_quotes = array(),
        $_shipping_boxes = 1,
        $_shipping_weight = 0;

// class constructor
    function osC_Shipping($module = '') {
      global $osC_Language;

      if (isset($_SESSION['osC_Shipping_data']) === false) {
        $_SESSION['osC_Shipping_data'] = array('shipping_boxes' => 1,
                                               'shipping_weight' => 0,
                                               'quotes' => array());
      }

      $this->_shipping_boxes =& $_SESSION['osC_Shipping_data']['shipping_boxes'];
      $this->_shipping_weight =& $_SESSION['osC_Shipping_data']['shipping_weight'];
      $this->_quotes =& $_SESSION['osC_Shipping_data']['quotes'];

      if (defined('MODULE_SHIPPING_INSTALLED') && (osc_empty(MODULE_SHIPPING_INSTALLED) === false)) {
        $this->_modules = explode(';', MODULE_SHIPPING_INSTALLED);

        $include_modules = array();

        if ( (empty($module) === false) && (in_array(substr($module['id'], 0, strpos($module['id'], '_')) . '.' . substr($_SERVER['PHP_SELF'], (strrpos($_SERVER['PHP_SELF'], '.')+1)), $this->_modules)) ) {
          $include_modules[] = array('class' => substr($module['id'], 0, strpos($module['id'], '_')), 'file' => substr($module['id'], 0, strpos($module['id'], '_')) . '.' . substr($_SERVER['PHP_SELF'], (strrpos($_SERVER['PHP_SELF'], '.')+1)));
        } else {
          foreach ($this->_modules as $value) {
            $class = substr($value, 0, strrpos($value, '.'));
            $include_modules[] = array('class' => $class, 'file' => $value);
          }
        }

        $osC_Language->load('modules-shipping');

        foreach ($include_modules as $module) {
          include('includes/modules/shipping/' . $module['file']);

          $GLOBALS[$module['class']] = new $module['class'];
        }
      }
    }

    function calculateQuotes($method = '', $module = '') {
      global $osC_ShoppingCart;

      $this->_quotes = array();

      if (is_array($this->_modules)) {
        $this->_shipping_weight = $osC_ShoppingCart->getWeight();

        if (SHIPPING_BOX_WEIGHT >= ($this->_shipping_weight * SHIPPING_BOX_PADDING/100)) {
          $this->_shipping_weight = $this->_shipping_weight + SHIPPING_BOX_WEIGHT;
        } else {
          $this->_shipping_weight = $this->_shipping_weight + ($this->_shipping_weight * SHIPPING_BOX_PADDING/100);
        }

        if ($this->_shipping_weight > SHIPPING_MAX_WEIGHT) { // Split into many boxes
          $this->_shipping_boxes = ceil($this->_shipping_weight / SHIPPING_MAX_WEIGHT);
          $this->_shipping_weight = $this->_shipping_weight / $this->_shipping_boxes;
        }

        $include_quotes = array();

        foreach ($this->_modules as $value) {
          $class = substr($value, 0, strrpos($value, '.'));
          if (tep_not_null($module)) {
            if ( ($module == $class) && ($GLOBALS[$class]->enabled) ) {
              $include_quotes[] = $class;
            }
          } elseif ($GLOBALS[$class]->enabled) {
            $include_quotes[] = $class;
          }
        }

        foreach ($include_quotes as $module) {
          $quotes = $GLOBALS[$module]->quote($method);

          if (is_array($quotes)) {
            $this->_quotes[] = $quotes;
          }
        }
      }
    }

    function hasQuotes() {
      return !empty($this->_quotes);
    }

    function getQuotes($method = '', $module = '') {
      if ( (empty($method) === false) && (empty($module) === false) ) {
        foreach ($this->_quotes as $quote) {
          if ($quote['id'] == $module) {
            foreach ($quote['methods'] as $quote_method) {
              if ($quote_method['id'] == $method) {
                return array('id' => $quote['id'],
                             'module' => $quote['module'],
                             'methods' => $quote_method,
                             'tax' => $quote['tax']);
              }
            }
          }
        }
      }

      return $this->_quotes;
    }

    function getCheapestQuote() {
      if (is_array($this->_modules)) {
        $rates = array();

        foreach ($this->_modules as $value) {
          $class = substr($value, 0, strrpos($value, '.'));
          if ($GLOBALS[$class]->enabled) {
            $quotes = $GLOBALS[$class]->quotes;

            for ($i=0, $n=sizeof($quotes['methods']); $i<$n; $i++) {
              if (isset($quotes['methods'][$i]['cost']) && tep_not_null($quotes['methods'][$i]['cost'])) {
                $rates[] = array('id' => $quotes['id'] . '_' . $quotes['methods'][$i]['id'],
                                 'title' => $quotes['module'] . ' (' . $quotes['methods'][$i]['title'] . ')',
                                 'cost' => $quotes['methods'][$i]['cost']);
              }
            }
          }
        }

        $cheapest = false;

        for ($i=0, $n=sizeof($rates); $i<$n; $i++) {
          if (is_array($cheapest)) {
            if ($rates[$i]['cost'] < $cheapest['cost']) {
              $cheapest = $rates[$i];
            }
          } else {
            $cheapest = $rates[$i];
          }
        }

        return $cheapest;
      }
    }
  }
?>