Augment category detail with product information - php

Question

I currently have a piece of code that puts together data about all of the categories in Magento. I would like to add product details, including but not limited to:
price
sku
image url
I'm having trouble adding those attributes to the response
<?php
require_once('../app/Mage.php'); //Path to Magento
umask(0);
Mage::app();
function getCategoryTree($recursionLevel, $storeId = 1)
{
$parent = Mage::app()->getStore()->getRootCategoryId();
$tree = Mage::getResourceModel('catalog/category_tree');
$nodes = $tree->loadNode($parent)
->loadChildren($recursionLevel)
->getChildren();
$tree->addCollectionData(null, false, $parent);
$categoryTreeData = array();
foreach ($nodes as $node) {
$categoryTreeData[$node->getData('entity_id')] = getNodeChildrenData($node);
}
return $categoryTreeData;
}
function getNodeChildrenData(Varien_Data_Tree_Node $node)
{
$data = array(
'title' => $node->getName(),
'url' => $node->getData('url_key'),
'price' => $node->getPrice(),
);
foreach ($node->getChildren() as $childNode) {
if (!array_key_exists('children', $data)) {
$data['children'] = array();
}
$data['children'][$childNode->getData('entity_id')] = getNodeChildrenData($childNode);
}
return $data;
}
print_r(json_encode(getCategoryTree(100)));
?>

Answer 1

You can easily bring in information about products, but you'll need to load product collections along the way. So far you're dealing with only category models (as mentioned in the comments) which don't contain any product data.
To load the set of products associated with a category, use:
<?php
...
$products = Mage::getModel('catalog/product')
->getCollection()
->addAttributeToSelect({attribute})
->addCategoryFilter($category)
->load();
$category should be a category object and $products is a collection of products that you can loop through. For each product attribute that you are interested in, add an addAttributeToSelect() entry with the name of the attribute in the pares. You can then get product details by writing things like:
<?php
...
foreach($products as $product) {
$price = $product->getPrice();
}