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<?php
/**
* Sitemap handling functions
*
* @license GPL 2 (http://www.gnu.org/licenses/gpl.html)
* @author Michael Hamann <michael@content-space.de>
*/
if(!defined('DOKU_INC')) die('meh.');
/**
* A class for building sitemaps and pinging search engines with the sitemap URL.
*
* @author Michael Hamann
*/
class Sitemapper {
/**
* Builds a Google Sitemap of all public pages known to the indexer
*
* The map is placed in the cache directory named sitemap.xml.gz - This
* file needs to be writable!
*
* @author Michael Hamann
* @author Andreas Gohr
* @link https://www.google.com/webmasters/sitemaps/docs/en/about.html
* @link http://www.sitemaps.org/
*
* @return bool
*/
public static function generate(){
global $conf;
if($conf['sitemap'] < 1 || !is_numeric($conf['sitemap'])) return false;
$sitemap = Sitemapper::getFilePath();
if(file_exists($sitemap)){
if(!is_writable($sitemap)) return false;
}else{
if(!is_writable(dirname($sitemap))) return false;
}
if(@filesize($sitemap) &&
@filemtime($sitemap) > (time()-($conf['sitemap']*86400))){ // 60*60*24=86400
dbglog('Sitemapper::generate(): Sitemap up to date');
return false;
}
dbglog("Sitemapper::generate(): using $sitemap");
$pages = idx_get_indexer()->getPages();
dbglog('Sitemapper::generate(): creating sitemap using '.count($pages).' pages');
$items = array();
// build the sitemap items
foreach($pages as $id){
//skip hidden, non existing and restricted files
if(isHiddenPage($id)) continue;
if(auth_aclcheck($id,'',array()) < AUTH_READ) continue;
$item = SitemapItem::createFromID($id);
if ($item !== null)
$items[] = $item;
}
$eventData = array('items' => &$items, 'sitemap' => &$sitemap);
$event = new Doku_Event('SITEMAP_GENERATE', $eventData);
if ($event->advise_before(true)) {
//save the new sitemap
$event->result = io_saveFile($sitemap, Sitemapper::getXML($items));
}
$event->advise_after();
return $event->result;
}
/**
* Builds the sitemap XML string from the given array auf SitemapItems.
*
* @param $items array The SitemapItems that shall be included in the sitemap.
* @return string The sitemap XML.
*
* @author Michael Hamann
*/
private static function getXML($items) {
ob_start();
echo '<?xml version="1.0" encoding="UTF-8"?>'.NL;
echo '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">'.NL;
foreach ($items as $item) {
/** @var SitemapItem $item */
echo $item->toXML();
}
echo '</urlset>'.NL;
$result = ob_get_contents();
ob_end_clean();
return $result;
}
/**
* Helper function for getting the path to the sitemap file.
*
* @return string The path to the sitemap file.
*
* @author Michael Hamann
*/
public static function getFilePath() {
global $conf;
$sitemap = $conf['cachedir'].'/sitemap.xml';
if (self::sitemapIsCompressed()) {
$sitemap .= '.gz';
}
return $sitemap;
}
/**
* Helper function for checking if the sitemap is compressed
*
* @return bool If the sitemap file is compressed
*/
public static function sitemapIsCompressed() {
global $conf;
return $conf['compression'] === 'bz2' || $conf['compression'] === 'gz';
}
/**
* Pings search engines with the sitemap url. Plugins can add or remove
* urls to ping using the SITEMAP_PING event.
*
* @author Michael Hamann
*
* @return bool
*/
public static function pingSearchEngines() {
//ping search engines...
$http = new DokuHTTPClient();
$http->timeout = 8;
$encoded_sitemap_url = urlencode(wl('', array('do' => 'sitemap'), true, '&'));
$ping_urls = array(
'google' => 'http://www.google.com/webmasters/sitemaps/ping?sitemap='.$encoded_sitemap_url,
'microsoft' => 'http://www.bing.com/webmaster/ping.aspx?siteMap='.$encoded_sitemap_url,
'yandex' => 'http://blogs.yandex.ru/pings/?status=success&url='.$encoded_sitemap_url
);
$data = array('ping_urls' => $ping_urls,
'encoded_sitemap_url' => $encoded_sitemap_url
);
$event = new Doku_Event('SITEMAP_PING', $data);
if ($event->advise_before(true)) {
foreach ($data['ping_urls'] as $name => $url) {
dbglog("Sitemapper::PingSearchEngines(): pinging $name");
$resp = $http->get($url);
if($http->error) dbglog("Sitemapper:pingSearchengines(): $http->error");
dbglog('Sitemapper:pingSearchengines(): '.preg_replace('/[\n\r]/',' ',strip_tags($resp)));
}
}
$event->advise_after();
return true;
}
}
/**
* An item of a sitemap.
*
* @author Michael Hamann
*/
class SitemapItem {
public $url;
public $lastmod;
public $changefreq;
public $priority;
/**
* Create a new item.
*
* @param string $url The url of the item
* @param int $lastmod Timestamp of the last modification
* @param string $changefreq How frequently the item is likely to change. Valid values: always, hourly, daily, weekly, monthly, yearly, never.
* @param $priority float|string The priority of the item relative to other URLs on your site. Valid values range from 0.0 to 1.0.
*/
public function __construct($url, $lastmod, $changefreq = null, $priority = null) {
$this->url = $url;
$this->lastmod = $lastmod;
$this->changefreq = $changefreq;
$this->priority = $priority;
}
/**
* Helper function for creating an item for a wikipage id.
*
* @param string $id A wikipage id.
* @param string $changefreq How frequently the item is likely to change. Valid values: always, hourly, daily, weekly, monthly, yearly, never.
* @param float|string $priority The priority of the item relative to other URLs on your site. Valid values range from 0.0 to 1.0.
* @return SitemapItem The sitemap item.
*/
public static function createFromID($id, $changefreq = null, $priority = null) {
$id = trim($id);
$date = @filemtime(wikiFN($id));
if(!$date) return null;
return new SitemapItem(wl($id, '', true), $date, $changefreq, $priority);
}
/**
* Get the XML representation of the sitemap item.
*
* @return string The XML representation.
*/
public function toXML() {
$result = ' <url>'.NL
.' <loc>'.hsc($this->url).'</loc>'.NL
.' <lastmod>'.date_iso8601($this->lastmod).'</lastmod>'.NL;
if ($this->changefreq !== null)
$result .= ' <changefreq>'.hsc($this->changefreq).'</changefreq>'.NL;
if ($this->priority !== null)
$result .= ' <priority>'.hsc($this->priority).'</priority>'.NL;
$result .= ' </url>'.NL;
return $result;
}
}
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