Using attribute text value to calculate price

[dejavu]

Does anyone know how to use an attribute text value to calculate price?

Any help that would point me in the right direction would be appreciated, like module name and paths

[dbltoe]

Have you been to the attributes controller?
Have you clicked on tutorials/FAQ and entered "price by attribute" in the advance search?

[dejavu]

I had to modify classes/shopping cart.php

In two places code similar to:

         $attribute_name = $db->Execute("select products_options_name
                            from ". TABLE_PRODUCTS_OPTIONS . "
                            where products_options_id = '" . (int)$option . "'");

          $attribute_name->fields['products_options_name'];

         if ($attribute_name->fields['products_options_name'] == 'Value: $')
         {
             $text_val = $this->contents[$products_id]['attributes_values'][$attribute_price->fields['options_id']];
             $attributes_price += $text_val;

          }

and

          $attribute_name = $db->Execute("select products_options_name
                            from ". TABLE_PRODUCTS_OPTIONS . "
                            where products_options_id = '". $attribute_price->fields['options_id']. "'" );

          $attribute_name->fields['products_options_name'];

         if ($attribute_name->fields['products_options_name'] == 'Value: $')
         {
             $text_val = $this->contents[$products_id]['attributes_values'][$attribute_price->fields['options_id']];
             $this->total += $qty * zen_add_tax($text_val, $products_tax);

          }

I also had to modify modules/attributes to check the input:

                       $tmp_html = '<input type="text" name="id[' . TEXT_PREFIX . $products_options_names->fields['products_options_id'] . ']" size="' . $products_options_names->fields['products_options_size'] .'" maxlength="' . $products_options_names->fields['products_options_length'] . '" value="' . htmlspecialchars($tmp_value) .'" id="' . 'attrib-' . $products_options_names->fields['products_options_id'] . '-' . $products_options_value_id . '" onchange="if (\''.$products_options_names->fields['products_options_name'].'\' == \'Value\' && !parseInt(document.all[\'id[' . TEXT_PREFIX . $products_options_names->fields['products_options_id'] . ']\'].value)) { alert(\'Enter a valid value, please.\');document.all[\'id[' . TEXT_PREFIX . $products_options_names->fields['products_options_id'] . ']\'].value = \'\'; }"/>';

[dejavu]

I removed the javascript from attributes.php and added to functions/function_lookups.php

          $attribute_name = $db->Execute("select products_options_name
                            from ". TABLE_PRODUCTS_OPTIONS . "
                            where products_options_id = '". $check_attributes->fields['options_id']. "'" );

          $attribute_name->fields['products_options_name'];

         if ($attribute_name->fields['products_options_name'] == 'Value: $')
         {
              if (!is_numeric($value))
              {
                  $check_valid = false;
              }
          }