magento google simple shopping configuration

google_simple_shopping.php

<!-- Basic Product Information -->
<?
// only use products with enabled parents
$parentIds = Mage::getModel('catalog/product_type_configurable')->getParentIdsByChild($product->getId());
if(isset($parentIds[0])) {
  $status = Mage::getResourceModel('catalog/product')->getAttributeRawValue($parentIds[0], 'status', 1);
  if($status != 1) $myPattern=null;
}
?>
<g:id><? return substr($product->getId(), 0, 50); ?></g:id>
<g:title>{feed_name parent,[substr],[70],[...]}</g:title>
<g:description><?
$desc = $product->getDescription();
$parentIds = Mage::getModel('catalog/product_type_configurable')->getParentIdsByChild($product->getId());
if(isset($parentIds[0])) {
  $desc = Mage::getResourceModel('catalog/product')->getAttributeRawValue($parentIds[0], 'description', 1);
}
$desc = strip_tags(html_entity_decode($desc));
$desc = preg_replace("/[\r\n]{2,}/", " ", $desc);
$desc = iconv("utf-8", "utf-8//ignore", $desc);
if(strlen($desc > 4999)) $desc = substr($desc, 0, 4997)  . "...";
return $desc;
?></g:description>
<g:google_product_category>{category_mapping parent,[0]}</g:google_product_category>
<g:product_type>{categories parent, [1], [2], [1]}</g:product_type> 
<!--g:link>{url parent,[substr],[2000]}</g:link-->
<g:link>
<?

/* suit products have bundle value attributes */
$bundleValue = Mage::getResourceModel('catalog/product')->getAttributeRawValue($product->getId(), 'bundle_value', 1);

if($bundleValue) {
  return '{url parent,[substr],[2000]}';
}
else {

  $url = $product->setStoreId(1)->getProductUrl();
  $urlHash = array();
  $parentIds = Mage::getModel('catalog/product_type_configurable')->getParentIdsByChild($product->getId());

/*
if(isset($parentIds[0])) {

  $parent = Mage::getModel('catalog/product')->setStoreId(1)->load($parentIds[0]);

  $url = $parent->setStoreId(1)->getProductUrl();

  $attrs = $parent->getTypeInstance(true)->getConfigurableAttributes($parent);

  foreach ($attrs as $attribute) {
    $productAttribute   = $attribute->getProductAttribute();
    $productAttributeId = $productAttribute->getId();
    if($attributeValue = $product->getData($productAttribute->getAttributeCode())) {
      $urlHash[$productAttributeId] = $attributeValue;
    }
  }
}
*/

  if(isset($parentIds[0])) {
    $rewrite = Mage::getModel('core/url_rewrite');
    $idPath = 'product/'.$parentIds[0];
    $rewrite->loadByIdPath($idPath);
    $parentUrl = Mage::getUrl('', array('_direct' => $rewrite->getRequestPath(), '_current' => false, '_store' => 1));
    $url = ($parentUrl ? $parentUrl : $url);
  }

  if(count($urlHash) > 0) {
    $url .= '#'.http_build_query($urlHash);
  }

  return substr($url, 0, 2000);
}
?>
</g:link>
<g:image_link>{image parent,[0],[substr],[2000]}</g:image_link>
<g:condition>new</g:condition>
<!-- Availability & Price -->
<g:availability>{is_in_stock?[in stock]:[out of stock]:[out of stock]}</g:availability>
<g:price>{normal_price,[GBR],[0.00]GBR}</g:price>
{G:SALE_PRICE,[GBR],[0.00]}

<!-- Unique Product Identifiers-->
<g:brand>{manufacturer parent,[substr],[70]}</g:brand>
<g:gtin>{barcode_ean_gtin,[substr],[50]}</g:gtin>
<g:mpn>{manufacturer_code parent,[substr],[70]}</g:mpn>
<g:identifier_exists><?
$identifier_exists = "true";

$gtin = $product->getData('barcode_ean_gtin'); 

/*
$parentIds = Mage::getModel('catalog/product_type_configurable')->getParentIdsByChild($product->getId());
$brand = Mage::getResourceModel('catalog/product')->getAttributeRawValue($parentIds[0], 'manufacturer', 1);
$mpn = Mage::getResourceModel('catalog/product')->getAttributeRawValue($parentIds[0], 'manufacturer_code', 1);

if(strlen($brand)) {
  if(strlen($gtin) < 1 && strlen($mpn) < 1) {
    $identifier_exists = "false";
  }
}
else {
  $identifier_exists = "false";
}

if(strtolower($mpn) == "false") { $identifier_exists = "false"; }
*/

if(strtolower($gtin) == "false") { $identifier_exists = "false"; }

return $identifier_exists;
?></g:identifier_exists>

<!-- Apparel Products -->
<g:gender>male</g:gender>
<g:age_group>adult</g:age_group>
<!-- color and size -->
<g:size_system>UK</g:size_system>
<g:size_type>Big and Tall</g:size_type>
<g:size>{topsize,[substr],[100]}{waist,[substr],[100]}{shoesize,[substr],[100]}{shirtcollar,[substr],[100]} {size_modifier}</g:size>
<g:color>{color parent,[substr],[100]}</g:color>


<!-- Product Variants -->
<g:item_group_id><? 
$groupId = null;
if($product->getTypeId() == 'simple'){

$parentIds = Mage::getModel('catalog/product_type_configurable')->getParentIdsByChild($product->getId());

if(isset($parentIds[0])) $groupId = $parentIds[0];

}
return substr("$groupId", 0, 50);
?></g:item_group_id>

<g:material>{material parent,[substr],[200]}</g:material>
<g:pattern>{pattern parent,[substr],[100]}</g:pattern>

<!-- Shipping -->
<g:shipping_weight>{weight parent,[float],[2]} kg</g:shipping_weight>

<!-- AdWords attributes -->
<g:adwords_grouping>{adwords_grouping parent}</g:adwords_grouping>
<g:adwords_labels>{adwords_labels parent}</g:adwords_labels>