/**
* Direct invocation of the constructor is not permitted.
*/
protected function __construct(array $config)
{
$this->_dir = \RX_BASEDIR . 'files/cache/store';
if (!Storage::isDirectory($this->_dir)) {
Storage::createDirectory($this->_dir);
}
}
/**
* Direct invocation of the constructor is not permitted.
*/
protected function __construct()
{
$dir = \RX_BASEDIR . 'files/cache/store';
if (!Storage::isDirectory($dir)) {
Storage::createDirectory($dir);
}
$key = substr(hash_hmac('sha256', $dir, config('crypto.authentication_key')), 0, 32);
$filename = "{$dir}/{$key}.db";
if (Storage::exists($filename)) {
$this->_connect($filename);
} else {
$this->_connect($filename);
for ($i = 0; $i < 32; $i++) {
$this->_dbh->exec('CREATE TABLE cache_' . $i . ' (k TEXT PRIMARY KEY, v TEXT, exp INT)');
}
}
}
/**
* Get an instance of HTMLPurifier.
*
* @return object
*/
public static function getHTMLPurifier()
{
// Create an instance with reasonable defaults.
if (self::$_htmlpurifier === null) {
// Get the default configuration.
$config = \HTMLPurifier_Config::createDefault();
// Customize the default configuration.
$config->set('Attr.AllowedFrameTargets', array('_blank'));
$config->set('Attr.DefaultImageAlt', '');
$config->set('Attr.EnableID', true);
$config->set('Attr.IDPrefix', 'user_content_');
$config->set('AutoFormat.AutoParagraph', false);
$config->set('AutoFormat.DisplayLinkURI', false);
$config->set('AutoFormat.Linkify', false);
$config->set('Core.Encoding', 'UTF-8');
$config->set('HTML.Doctype', 'XHTML 1.0 Transitional');
$config->set('HTML.FlashAllowFullScreen', true);
$config->set('HTML.MaxImgLength', null);
$config->set('CSS.MaxImgLength', null);
$config->set('CSS.Proprietary', true);
$config->set('Output.FlashCompat', true);
$config->set('Output.Newline', "\n");
$config->set('URI.MakeAbsolute', false);
// Allow embedding of external multimedia content.
$config->set('HTML.SafeEmbed', true);
$config->set('HTML.SafeIframe', true);
$config->set('HTML.SafeObject', true);
$config->set('URI.SafeIframeRegexp', MediaFilter::getIframeWhitelistRegex());
// Set the serializer path.
$config->set('Cache.SerializerPath', \RX_BASEDIR . 'files/cache/htmlpurifier');
Storage::createDirectory(\RX_BASEDIR . 'files/cache/htmlpurifier');
// Modify the HTML definition to support editor components and widgets.
$def = $config->getHTMLDefinition(true);
$def->addAttribute('img', 'editor_component', 'Text');
$def->addAttribute('div', 'editor_component', 'Text');
$def->addAttribute('img', 'rx_encoded_properties', 'Text');
$def->addAttribute('div', 'rx_encoded_properties', 'Text');
// Support HTML5 and CSS3.
self::_supportHTML5($config);
self::_supportCSS3($config);
// Cache our instance of HTMLPurifier.
self::$_htmlpurifier = new \HTMLPurifier($config);
}
// Return the cached instance.
return self::$_htmlpurifier;
}
