/**
* Loads the sitemap tree from config or cache
* If loading from config, caches the result
*
* @return NodePub\Navigation\SitemapTree
*/
public function load()
{
$sitemapTree = new SitemapTree('root');
$sitemapTree->setIsRoot(true);
$cache = new SitemapCache($this->cacheFile);
if ($serializedArray = $cache->load()) {
$sitemapTree->unserialize($serializedArray);
} elseif (is_file($this->configFile)) {
$sitemapTree = $this->expandChildNodes($parent, Yaml::load($this->configFile));
$cache->cacheSerializedArray($sitemapTree->serialize());
}
return $sitemapTree;
}
/**
* Converts a serialized array back into a SitemapTree object
*/
public function unserialize($importArray = array())
{
foreach ($importArray as $nodeArray) {
if (isset($nodeArray['name']) && isset($nodeArray['href'])) {
$node = new SitemapTree($nodeArray['name']);
$node->setHref($nodeArray['href']);
if (isset($nodeArray['nodes']) && is_array($nodeArray['nodes'])) {
$node->unserialize($nodeArray['nodes']);
}
$this->addNode($node);
}
}
}