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<?php
/**
* @package cms
* @subpackage publishers
*/
abstract class StaticPublisher extends DataExtension {
/**
* Defines whether to output information about publishing or not. By
* default, this is off, and should be turned on when you want debugging
* (for example, in a cron task)
*/
static $echo_progress = false;
/**
* Realtime static publishing... the second a page
* is saved, it is written to the cache
*/
static $disable_realtime = false;
/*
* This is the current static publishing theme, which can be set at any point
* If it's not set, then the last non-null theme, set via SSViewer::set_theme() is used
* The obvious place to set this is in _config.php
*/
static $static_publisher_theme=false;
abstract function publishPages($pages);
abstract function unpublishPages($pages);
static function set_static_publisher_theme($theme){
self::$static_publisher_theme=$theme;
}
static function static_publisher_theme(){
return self::$static_publisher_theme;
}
static function echo_progress() {
return (boolean)self::$echo_progress;
}
/**
* Either turns on (boolean true) or off (boolean false) the progress indicators.
* @see StaticPublisher::$echo_progress
*/
static function set_echo_progress($progress) {
self::$echo_progress = (boolean)$progress;
}
/**
* Called after a page is published.
*/
function onAfterPublish($original) {
$this->republish($original);
}
/**
* Called after link assets have been renamed, and the live site has been updated, without
* an actual publish event.
*
* Only called if the published content exists and has been modified.
*/
function onRenameLinkedAsset($original) {
$this->republish($original);
}
function republish($original) {
if (self::$disable_realtime) return;
$urls = array();
if($this->owner->hasMethod('pagesAffectedByChanges')) {
$urls = $this->owner->pagesAffectedByChanges($original);
} else {
$pages = Versioned::get_by_stage('SiteTree', 'Live', '', '', '', 10);
if($pages) {
foreach($pages as $page) {
$urls[] = $page->AbsoluteLink();
}
}
}
// Note: Similiar to RebuildStaticCacheTask->rebuildCache()
foreach($urls as $i => $url) {
if(!is_string($url)) {
user_error("Bad URL: " . var_export($url, true), E_USER_WARNING);
continue;
}
// Remove leading slashes from all URLs (apart from the homepage)
if(substr($url,-1) == '/' && $url != '/') $url = substr($url,0,-1);
$urls[$i] = $url;
}
$urls = array_unique($urls);
$this->publishPages($urls);
}
/**
* On after unpublish, get changes and hook into underlying
* functionality
*/
function onAfterUnpublish($page) {
if (self::$disable_realtime) return;
// Get the affected URLs
if($this->owner->hasMethod('pagesAffectedByUnpublishing')) {
$urls = $this->owner->pagesAffectedByUnpublishing();
$urls = array_unique($urls);
} else {
$urls = array($this->owner->AbsoluteLink());
}
$legalPages = singleton('Page')->allPagesToCache();
$urlsToRepublish = array_intersect($urls, $legalPages);
$urlsToUnpublish = array_diff($urls, $legalPages);
$this->unpublishPages($urlsToUnpublish);
$this->publishPages($urlsToRepublish);
}
/**
* Get all external references to CSS, JS,
*/
function externalReferencesFor($content) {
$CLI_content = escapeshellarg($content);
$tidy = `echo $CLI_content | tidy -numeric -asxhtml`;
$tidy = preg_replace('/xmlns="[^"]+"/','', $tidy);
$xContent = new SimpleXMLElement($tidy);
//Debug::message($xContent->asXML());
$xlinks = array(
"//link[@rel='stylesheet']/@href" => false,
"//script/@src" => false,
"//img/@src" => false,
"//a/@href" => true,
);
$urls = array();
foreach($xlinks as $xlink => $assetsOnly) {
$matches = $xContent->xpath($xlink);
if($matches) foreach($matches as $item) {
$url = $item . '';
if($assetsOnly && substr($url,0,7) != ASSETS_DIR . '/') continue;
$urls[] = $url;
}
}
return $urls;
}
}
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