functions_prices.php

Zen Cart是一款最新的购物车软件

      } else {
        $sale_maker_discount = '';
      }
    }
    return $sale_maker_discount;
  }

////
// Actual Price Retail
// Specials and Tax Included
  function zen_get_products_actual_price($products_id) {
    global $db, $currencies;
    $product_check = $db->Execute("select products_tax_class_id, products_price, products_priced_by_attribute, product_is_free, product_is_call from " . TABLE_PRODUCTS . " where products_id = '" . $products_id . "'" . " limit 1");

    $show_display_price = '';
    $display_normal_price = zen_get_products_base_price($products_id);
    $display_special_price = zen_get_products_special_price($products_id, true);
    $display_sale_price = zen_get_products_special_price($products_id, false);

    $products_actual_price = $display_normal_price;

    if ($display_special_price) {
      $products_actual_price = $display_special_price;
    }
    if ($display_sale_price) {
      $products_actual_price = $display_sale_price;
    }

    // If Free, Show it
    if ($product_check->fields['product_is_free'] == '1') {
      $products_actual_price = 0;
    }

    return $products_actual_price;
  }

////
// return attributes_price_factor
  function zen_get_attributes_price_factor($price, $special, $factor, $offset) {
    if (ATTRIBUTES_PRICE_FACTOR_FROM_SPECIAL =='1' and $special) {
      // calculate from specials_new_products_price
      $calculated_price = $special * ($factor - $offset);
    } else {
      // calculate from products_price
      $calculated_price = $price * ($factor - $offset);
    }
//    return '$price ' . $price . ' $special ' . $special . ' $factor ' . $factor . ' $offset ' . $offset;
    return $calculated_price;
  }


////
// return attributes_qty_prices or attributes_qty_prices_onetime based on qty
  function zen_get_attributes_qty_prices_onetime($string, $qty) {
      $attribute_qty = split("[:,]" , $string);
      $size = sizeof($attribute_qty);
      for ($i=0, $n=$size; $i<$n; $i+=2) {
        $new_price = $attribute_qty[$i+1];
        if ($qty <= $attribute_qty[$i]) {
          $new_price = $attribute_qty[$i+1];
          break;
        }
      }
      return $new_price;
}


////
// Check specific attributes_qty_prices or attributes_qty_prices_onetime for a given quantity price
  function zen_get_attributes_quantity_price($check_what, $check_for) {
// $check_what='1:3.00,5:2.50,10:2.25,20:2.00';
// $check_for=50;
      $attribute_table_cost = split("[:,]" , $check_what);
      $size = sizeof($attribute_table_cost);
      for ($i=0, $n=$size; $i<$n; $i+=2) {
        if ($check_for >= $attribute_table_cost[$i]) {
          $attribute_quantity_check = $attribute_table_cost[$i];
          $attribute_quantity_price = $attribute_table_cost[$i+1];
        }
      }
//          echo '<br>Cost ' . $check_for . ' - '  .  $attribute_quantity_check . ' x ' . $attribute_quantity_price;
     return $attribute_quantity_price;
  }


////
// attributes final price
  function zen_get_attributes_price_final($attribute, $qty = 1, $pre_selected, $include_onetime = 'false') {
    global $db;
    global $cart;

    if ($pre_selected == '' or $attribute != $pre_selected->fields["products_attributes_id"]) {
      $pre_selected = $db->Execute("select pa.* from " . TABLE_PRODUCTS_ATTRIBUTES . " pa where pa.products_attributes_id= '" . $attribute . "'");
    } else {
      // use existing select
    }

    // normal attributes price
    if ($pre_selected->fields["price_prefix"] == '-') {
      $attributes_price_final -= $pre_selected->fields["options_values_price"];
    } else {
      $attributes_price_final += $pre_selected->fields["options_values_price"];
    }
    // qty discounts
    $attributes_price_final += zen_get_attributes_qty_prices_onetime($pre_selected->fields["attributes_qty_prices"], $qty);

    // price factor
    $display_normal_price = zen_get_products_actual_price($pre_selected->fields["products_id"]);
    $display_special_price = zen_get_products_special_price($pre_selected->fields["products_id"]);

    $attributes_price_final += zen_get_attributes_price_factor($display_normal_price, $display_special_price, $pre_selected->fields["attributes_price_factor"], $pre_selected->fields["attributes_price_factor_offset"]);

    // per word and letter charges
    if (zen_get_attributes_type($attribute) == PRODUCTS_OPTIONS_TYPE_TEXT) {
      // calc per word or per letter
    }

// onetime charges
    if ($include_onetime == 'true') {
      $pre_selected_onetime = $pre_selected;
      $attributes_price_final += zen_get_attributes_price_final_onetime($pre_selected->fields["products_attributes_id"], 1, $pre_selected_onetime);
    }

    return $attributes_price_final;
  }


////
// attributes final price onetime
  function zen_get_attributes_price_final_onetime($attribute, $qty= 1, $pre_selected_onetime) {
    global $db;
    global $cart;

    if ($pre_selected_onetime == '' or $attribute != $pre_selected_onetime->fields["products_attributes_id"]) {
      $pre_selected_onetime = $db->Execute("select pa.* from " . TABLE_PRODUCTS_ATTRIBUTES . " pa where pa.products_attributes_id= '" . $attribute . "'");
    } else {
      // use existing select
    }

// one time charges
    // onetime charge
      $attributes_price_final_onetime += $pre_selected_onetime->fields["attributes_price_onetime"];

    // price factor
    $display_normal_price = zen_get_products_actual_price($pre_selected_onetime->fields["products_id"]);
    $display_special_price = zen_get_products_special_price($pre_selected_onetime->fields["products_id"]);

    // price factor one time
      $attributes_price_final_onetime += zen_get_attributes_price_factor($display_normal_price, $display_special_price, $pre_selected_onetime->fields["attributes_price_factor_onetime"], $pre_selected_onetime->fields["attributes_price_factor_onetime_offset"]);

    // onetime charge qty price
      $attributes_price_final_onetime += zen_get_attributes_qty_prices_onetime($pre_selected_onetime->fields["attributes_qty_prices_onetime"], 1);

      return $attributes_price_final_onetime;
    }


////
// get attributes type
  function zen_get_attributes_type($check_attribute) {
    global $db;
    $check_options_id_query = $db->Execute("select options_id from " . TABLE_PRODUCTS_ATTRIBUTES . " where products_attributes_id='" . $check_attribute . "'");
    $check_type_query = $db->Execute("select products_options_type from " . TABLE_PRODUCTS_OPTIONS . " where products_options_id='" . $check_options_id_query->fields['options_id'] . "'");
    return $check_type_query->fields['products_options_type'];
  }


////
// calculate words
  function zen_get_word_count($string, $free=0) {
    if ($string != '') {
      while (strstr($string, '  ')) $string = str_replace('  ', ' ', $string);
      $string = trim($string);
      $word_count = substr_count($string, ' ');
      return (($word_count+1) - $free);
    } else {
      // nothing to count
      return 0;
    }
  }


////
// calculate words price
  function zen_get_word_count_price($string, $free=0, $price) {
    $word_count = zen_get_word_count($string, $free);
    if ($word_count >= 1) {
      return ($word_count * $price);
    } else {
      return 0;
    }
  }


////
// calculate letters
  function zen_get_letters_count($string, $free=0) {
    while (strstr($string, '  ')) $string = str_replace('  ', ' ', $string);
    $string = trim($string);
    if (TEXT_SPACES_FREE == '1') {
      $letters_count = strlen(str_replace(' ', '', $string));
    } else {
      $letters_count = strlen($string);
    }
    if ($letters_count - $free >= 1) {
      return ($letters_count - $free);
    } else {
      return 0;
    }
  }


////
// calculate letters price
  function zen_get_letters_count_price($string, $free=0, $price) {
      $letters_price = zen_get_letters_count($string, $free) * $price;
      if ($letters_price <= 0) {
        return 0;
      } else {
        return $letters_price;
      }
  }


////
// compute discount based on qty
  function zen_get_products_discount_price_qty($product_id, $check_qty, $check_amount=0) {
    global $db;
      $product_id = (int)$product_id;
      $products_query = $db->Execute("select products_discount_type, products_discount_type_from, products_priced_by_attribute from " . TABLE_PRODUCTS . " where products_id='" . $product_id . "'");
      $products_discounts_query = $db->Execute("select * from " . TABLE_PRODUCTS_DISCOUNT_QUANTITY . " where products_id='" . $product_id . "' and discount_qty <='" . $check_qty . "' order by discount_qty desc");

      $display_price = zen_get_products_base_price($product_id);
      $display_specials_price = zen_get_products_special_price($product_id, true);

      switch ($products_query->fields['products_discount_type']) {
        // none
        case ($products_discounts_query->EOF):
          //no discount applies
          $discounted_price = zen_get_products_actual_price($product_id);
          break;
        case '0':
          $discounted_price = zen_get_products_actual_price($product_id);
          break;
        // percentage discount
        case '1':
          if ($products_query->fields['products_discount_type_from'] == '0') {
            // priced by attributes
            if ($check_amount != 0) {
              $discounted_price = $check_amount - ($check_amount * ($products_discounts_query->fields['discount_price']/100));
//echo 'ID#' . $product_id . ' Amount is: ' . $check_amount . ' discount: ' . $discounted_price . '<br />';
//echo 'I SEE 2 for ' . $products_query->fields['products_discount_type'] . ' - ' . $products_query->fields['products_discount_type_from'] . ' - '. $check_amount . ' new: ' . $discounted_price . ' qty: ' . $check_qty;
            } else {
              $discounted_price = $display_price - ($display_price * ($products_discounts_query->fields['discount_price']/100));
            }
          } else {
            if (!$display_specials_price) {
              // priced by attributes
              if ($check_amount != 0) {
                $discounted_price = $check_amount - ($check_amount * ($products_discounts_query->fields['discount_price']/100));
              } else {
                $discounted_price = $display_price - ($display_price * ($products_discounts_query->fields['discount_price']/100));
              }
            } else {
              $discounted_price = $display_specials_price - ($display_specials_price * ($products_discounts_query->fields['discount_price']/100));
            }
          }

          break;
        // actual price
        case '2':
          if ($products_query->fields['products_discount_type_from'] == '0') {
            $discounted_price = $products_discounts_query->fields['discount_price'];
          } else {
            $discounted_price = $products_discounts_query->fields['discount_price'];
          }
          break;
        // amount offprice
        case '3':
          if ($products_query->fields['products_discount_type_from'] == '0') {
            $discounted_price = $display_price - $products_discounts_query->fields['discount_price'];
          } else {
            if (!$display_specials_price) {
              $discounted_price = $display_price - $products_discounts_query->fields['discount_price'];
            } else {
              $discounted_price = $display_specials_price - $products_discounts_query->fields['discount_price'];
            }
          }
          break;
      }

      return $discounted_price;
  }


////
// are there discount quanties
  function zen_get_discount_qty($product_id, $check_qty) {
    global $db;

    $product_id = (int)$product_id;

    $discounts_qty_query = $db->Execute("select * from " . TABLE_PRODUCTS_DISCOUNT_QUANTITY . " where products_id='" . $product_id . "' and discount_qty != 0");
//echo 'zen_get_discount_qty: ' . $product_id . ' - ' . $check_qty . '<br />';
    if ($discounts_qty_query->RecordCount() > 0 and $check_qty > 0) {
      return true;
    } else {
      return false;
    }
  }

?>