added sitemap, orm->ext_orm update to orm2 will come soon

Sitemap.php

@@ -0,0 +1,182 @@
+<?php
+class Sitemap_Core{
+
+	protected $sitemap;
+
+	protected $urlset;
+
+	protected $schema_file='http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd';
+
+	protected $changefreq = array('always','hourly','daily','weekly','monthly','yearly','never');
+
+	public $location;
+
+	/**
+	 * Constructs the Sitemap controller
+	 * 
+	 */
+	public function __construct()
+	{
+		//Create sitemap
+		$this->create_sitemap();
+		$this->location=url::base().'sitemap.xml';
+	}
+
+	/**
+	 * Render sitemap, sends xml header
+	 */
+	public function render($header = TRUE){
+
+		//XML header
+		$header AND header('Content-type: text/xml; charset=UTF-8');	
+		return $this->get_sitemap();
+	}
+	/**
+	 * Get the xml sitemap 
+	 * @return	string
+	 */
+	public function get_sitemap()
+	{
+		return $this->sitemap->saveXML();
+	}
+	/**
+	 * Save sitemap to the location
+	 * @param	string	file location
+	 */
+	public function save_sitemap($location)
+	{
+		$this->sitemap->save($location);
+	}
+	/**
+	 * Creates beginning of sitemap without urls
+	 * @return	void
+	 */
+	protected function create_sitemap(){
+		//Create sitemap
+		$sitemap= new DOMDocument;
+		$sitemap->formatOutput = true;
+		$sitemap->encoding='UTF-8';
+
+		//Create <urlset> 
+		$this->urlset=$sitemap->createElement('urlset');
+
+		$this->urlset->setAttribute('xmlns:xsi','http://www.w3.org/2001/XMLSchema-instance');
+		$this->urlset->setAttribute('xsi:schemaLocation','http://www.sitemaps.org/schemas/sitemap/0.9');
+//		$this->urlset->setAttribute('url',$this->schema_file);
+		$this->urlset->setAttribute('xmlns','http://www.sitemaps.org/schemas/sitemap/0.9');
+
+		//Append <urlset> to document
+		$sitemap->appendChild($this->urlset);		
+
+		$this->sitemap=$sitemap;
+	}
+	/**
+	 * Add url to sitemap
+	 * @param	string	url
+	 * @param	string	last time of modification format in YYYY-MM-DD
+	 * @param	string	change frequency always|hourly|daily|weekly|monthly|yearly|never
+	 * @return	object
+	 * 
+	 */
+	public function add_url($location,$lastmod=NULL,$changefreq=NULL,$priority=NULL)
+	{
+		$sitemap=$this->sitemap;
+
+		if(!valid::url($location))
+			throw new Kohana_Exception('sitemap.url_wrong_type', $location);
+
+		$url=$this->sitemap->createElement("url");
+
+		$loc=$this->sitemap->createElement("loc",$location);
+		$url->appendChild($loc);
+
+		//Last modification is optional
+		if($lastmod != NULL)
+		{		
+			$lastmod=$this->sitemap->createElement("lastmod",$lastmod);
+			$url->appendChild($lastmod);
+		}
+		//Change frequency is optional
+		if($changefreq != NULL)
+		{		
+			if(!in_array($changefreq,$this->changefreq))
+				throw new Kohana_Exception('sitemap.unknown_change_frequency', $changefreq);
+
+			$changefreq=$this->sitemap->createElement("changefreq",$changefreq);
+			$url->appendChild($changefreq);
+		}
+		//Priority is optional
+		if($priority != NULL)
+		{
+			if(!($priority >= 0 AND $priority <= 1))
+				throw new Kohana_Exception('sitemap.priority_out_of_range', $priority);		
+
+			$priority=$this->sitemap->createElement("priority",$priority);
+			$url->appendChild($priority);		
+		}
+
+		$this->urlset->appendChild($url);
+		return $this;
+	}
+	/**
+	 * Add modelname, orm model of that name will 
+	 * be used to find records and add each record to sitemap
+	 * calls get_url() on each record and checks for a 'modified' field, 
+	 * orm::$modified is expected to be unix timestamp
+	 * @param	mixed	name of orm model
+	 * @param	mixed	conditions of query, will be applied to models if array is supplied
+	 * @param   string	priority 0-1
+	 * @returns object
+	 */
+	public function add_model($model_names,$where = NULL, $priority= NULL)
+	{
+		$model_names=(array) $model_names;
+
+		foreach($model_names as $model_name)
+		{
+			$entries=ORM::factory($model_name);
+			($where != NULL) and $entries->where($where);
+
+			$entries=$entries->find_all();
+
+			foreach($entries as $entry)
+			{
+				//if a column 'modified' exists 
+				$lastmod=($entry->modified != NULL) ? date("Y-m-d",$entry->modified) : NULL;
+
+				//Create <url>
+				$this->add_url(url::base().$entry->get_url(),$lastmod,null,$priority);
+			}			
+		}		
+		return $this;
+	}	
+	/*
+	 * Ping sitemaps provider
+	 * @param	array	
+	 */
+	public function ping_google(array $options=array())
+	{
+		$url='www.google.com';
+		try
+		{
+			$request=fsockopen($url,80);
+			$http = 'GET /webmasters/sitemaps/ping?sitemap=' . 
+			urlencode($this->location).
+					 " HTTP/1.1\r\n".
+					 'Host:'.$url."\r\n".
+					 "Connection: Close\r\n\r\n";
+
+			fwrite($request,$http);
+			$response= fgets($request, 128);
+			fclose($request);
+
+			return (trim($response)=='HTTP/1.1 200 OK');
+
+		}
+		catch (Exception $e)
+		{
+			return false;
+		}		
+	}
+
+}