<?php
/**
 * @category	Fishpig
 * @package		Fishpig_Bolt
 * @license		http://fishpig.co.uk/license.txt
 * @author		Ben Tideswell <help@fishpig.co.uk>
 */

class Fishpig_Bolt_Model_Observer_Adminhtml extends Fishpig_Bolt_Model_Observer_Abstract
{
	/**
	 * Check if using bolt.php or index.php and redirect
	 *
	 * @param Varien_Event_Observer $observer
	 * @return $this
	 */
	public function redirectToBoltObserver(Varien_Event_Observer $observer)
	{
		if (Mage::app()->getRequest()->getParam('section') !== 'bolt') {
			return $this;
		}
		
		if (basename($_SERVER['SCRIPT_FILENAME']) === 'bolt.php') {
			return $this;
		}
		
		$newUri = str_replace(basename($_SERVER['SCRIPT_FILENAME']), 'bolt.php', $_SERVER['REQUEST_URI']);
		
		header('Location: ' . $newUri);
		exit;
	}

	/**
	 * After a product has been saved, clear it's fpc files
	 *
	 * @param Varien_Event_Observer $observer
	 * @return $this
	 */
	public function catalogProductSaveAfterObserver(Varien_Event_Observer $observer)
	{
		if ($this->isBoltDefined()) {
			$product = $observer->getEvent()->getProduct();

			try {
				Fishpig_Bolt_Cache::setCachePath(
					Mage::getStoreConfig('bolt/cache_file/path', 0)
				);
				
				if (($urlsByStore = $this->_getAllProductUrls($product)) !== false) {
					Mage::helper('bolt')->refreshCache($urlsByStore);
				}
			}
			catch (Exception $e) {
				Mage::getSingleton('adminhtml/session')->addError($e->getMessage());
				Mage::logException($e);
			}
		}

		return $this;
	}
	
	/**
	 * Automatically clean the CMS page cache
	 *
	 * @param Varien_Event_Observer $observer
	 * @return $this
	 */
	public function cmsPageSaveAfterObserver(Varien_Event_Observer $observer)
	{
		if ($this->isBoltDefined()) {
			$page = $observer->getEvent()->getObject();

			try {
				Fishpig_Bolt_Cache::setCachePath(
					Mage::getStoreConfig('bolt/cache_file/path', 0)
				);
				
				if (($urlsByStore = $this->_getAllPageUrls($page)) !== false) {
					Mage::helper('bolt')->refreshCache($urlsByStore);
				}
			}
			catch (Exception $e) {
				Mage::getSingleton('adminhtml/session')->addError($e->getMessage());
				Mage::logException($e);
			}
		}

		return $this;
	}
	
	/**
	 * Refresh the config file
	 *
	 * @param $observer = null
	 * @return array|false
	 */
	public function refreshConfig($observer = null)
	{
		return Mage::helper('bolt')->refreshConfig();
	}
	
	/**
	 * Retrieve all product URL's categorised by store for a specific product
	 *
	 * @param Mage_Catalog_Model_Product $product
	 * @return false|array
	 */
	protected function _getAllProductUrls(Mage_Catalog_Model_Product $product)
	{
		$resource = Mage::getSingleton('core/resource');
		$db = $resource->getConnection('core_read');
		
		$select = $db->select()
			->from($resource->getTableName('core/url_rewrite'), '*')
			->where('product_id=?', $product->getId())
			->where('request_path <> ?', '');
			
		if ($results = $db->fetchAll($select)) {
			$urlsByStore = array();
			
			foreach($results as $result) {
				if (!isset($urlsByStore[$result['store_id']])) {
					$urlsByStore[$result['store_id']] = array();
				}

				$urlsByStore[$result['store_id']][] = Mage::getUrl('', array('_direct' => $result['request_path'], '_store' => $result['store_id']));
			}
			
			return $urlsByStore;
		}
		
		return false;
	}
	
	/**
	 * Retrieve all URL's for $page
	 *
	 * @param Mage_Cms_Model_Page $page
	 * @return false|array
	 */
	protected function _getAllPageUrls(Mage_Cms_Model_Page $page)
	{
		if ($page->getStores()) {
			$urlsByStore = array();
			
			$stores = $page->getStores();
			
			if (count($stores) === 1 && $stores[0] == 0) {
				$stores = array_keys(Mage::app()->getStores());
			}

			foreach($stores as $storeId) {
				$url = Mage::getUrl('', array('_direct' => $page->getIdentifier(), '_store' => $storeId));

				$urlsByStore[$storeId] = array(
					$url,
					str_replace(basename($_SERVER['SCRIPT_NAME']) . '/', '', $url)	
				);

				if ($page->getIdentifier() == Mage::getStoreConfig('web/default/cms_home_page', $storeId)) {
					$urlsByStore[$storeId][] = rtrim(Mage::getUrl('', array('_store' => $storeId)), '/');
					$urlsByStore[$storeId][] = rtrim(str_replace(basename($_SERVER['SCRIPT_NAME']), '', rtrim(Mage::getUrl('', array('_store' => $storeId)), '/')), '/');
				}
			}

			return $urlsByStore;
		}
		
		return false;
	}
	
	/**
	 * Flush the Bolt cache
	 *
	 * @param Varien_Event_Observer $observer
	 * @return $this
	 */
	public function flushCacheObserver(Varien_Event_Observer $observer)
	{
		Mage::app()->getCacheInstance()->cleanType('bolt');
		
		return $this;
	}
}