public function exec()
{
timer('start', 'cache.parse');
// Recover cached headers
$this->_headers = @json_decode(file_get_contents("{$this->_getCachePath()}.json"), true);
// Cache specific headers
$this->addHeader('LP-Cache', $this->_hash);
//$this->addHeader('Expires', date('r', $this->_expire)); // Thu, 19 Nov 1981 08:52:00 GMT
$this->addHeader('Pragma', 'public');
$this->addHeader('Cache-Control', 'public, max-age=' . ($this->_expire - time()));
// Send headers
$this->_sendHeaders();
// Optimizations:
// - optimized local images, convert small images into inline base64
// - compress and combine local CSS & JS
// - get local external CSS files into the HTML output
// TODO: compress HTML?
echo Event::filter('cache', file_get_contents($this->_getCachePath()));
timer('end', 'cache.parse');
}
public static function init()
{
Event::register('content', function ($content) {
// Var assignation
$content = preg_replace_callback('/{{var ([^=}]*)=([^}]*)}}/', function ($M) {
$varname = trim($M[1]);
$value = trim($M[2]);
if (substr($value, 0, 3) == '~~~') {
$value = I18n::getSingleton()->translate(substr($value, 3));
}
Mvc::getResponse()->setData($varname, $value);
return '';
}, $content);
// Var echo
$content = preg_replace_callback('/{{var ([^}]*)}}/', function ($M) {
return Mvc::getResponse()->getData(trim($M[1]));
}, $content);
// Translate
$content = preg_replace_callback('/{{~~~([^}]*)}}/', function ($M) {
return I18n::getSingleton()->translate(trim($M[1]));
}, $content);
// Asset URL
$content = preg_replace_callback('/{{asset ([^}]*)}}/', function ($M) {
return asset(ltrim(trim($M[1]), '/'));
}, $content);
// Page URL helper
$content = preg_replace_callback('/{{url[ ]?([^}]*)}}/', function ($M) {
return page_url(trim($M[1]));
}, $content);
// Template include
$content = preg_replace_callback('/{{template ([^}]*)}}/', function ($M) {
ob_start();
template(trim($M[1]));
return Event::filter('content', ob_get_clean());
}, $content);
// {{header Content-Type: text/plain}}
$content = preg_replace_callback('/{{header ([^}]*)}}/', function ($M) {
if (preg_match('/^([^:]*): (.*)$/', trim($M[1]), $L)) {
Mvc::getResponse()->addHeader(trim($L[1]), trim($L[2]));
}
return '';
}, $content);
// {{redirect template/name}}
$content = preg_replace_callback('/{{redirect ([^}]*)}}/', function ($M) {
Mvc::getResponse()->redirect(page_url(trim($M[1])));
return '';
}, $content);
return $content;
});
}
public function getHtml()
{
if ($this->hasCache()) {
$this->_content = file_get_contents($this->getCacheFile());
} else {
ob_start();
Template::parse($this->_template, $this->_data);
$this->_content = Event::filter('content', ob_get_clean());
if ($this->isCacheEnabled()) {
@mkdir(dirname($this->getCacheFile()), 0777, true);
file_put_contents($this->getCacheFile(), $this->_content);
if ($ttl = $this->getData('ttl')) {
file_put_contents($this->getCacheFile() . '.expire', "{$ttl}");
} else {
@unlink($this->getCacheFile() . '.expire');
}
}
}
return $this->_content;
}
