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<?php
namespace No3x\WPML;
class WPML_MessageSanitizer {
const SAVED_COMMENT_HTMLEntity_OPEN = "savedcommenthtmlentityopen";
const SAVED_COMMENT_HTMLEntity_CLOSE = "savedcommenthtmlentityclose";
const SAVED_COMMENT_HTMLCode_OPEN = "savedcommenthtmlcodeopen";
const SAVED_COMMENT_HTMLCode_CLOSE = "savedcommenthtmlcodeclose";
private $mapping;
private $buffer;
public function __construct() {
$this->mapping = [
"<!--" => '<' . self::SAVED_COMMENT_HTMLEntity_OPEN . '>',
"-->" => '<' . self::SAVED_COMMENT_HTMLEntity_CLOSE . '>',
"<!--" => '<' . self::SAVED_COMMENT_HTMLCode_OPEN . '>',
"-->" => '<' . self::SAVED_COMMENT_HTMLCode_CLOSE . '>',
];
}
public function sanitize($message) {
$this->buffer = $message;
$this->saveComments();
$this->stripEvilCode();
$this->recoverComments();
return $this->buffer;
}
private function saveComments() {
$this->swapCommentsInStringWithMapping($this->mapping);
}
private function recoverComments() {
$this->swapCommentsInStringWithMapping(array_flip($this->mapping));
}
private function swapCommentsInStringWithMapping($mapping) {
foreach ($mapping as $from => $to) {
$this->buffer = str_replace($from, $to , $this->buffer);
}
}
private function stripEvilCode() {
$allowed_tags = wp_kses_allowed_html( 'post' );
if ( ! is_array( $allowed_tags ) ) {
$allowed_tags = [];
}
$allowed_tags['style'][''] = true;
$allowed_tags[self::SAVED_COMMENT_HTMLEntity_OPEN][''] = true;
$allowed_tags[self::SAVED_COMMENT_HTMLEntity_CLOSE][''] = true;
$allowed_tags[self::SAVED_COMMENT_HTMLCode_OPEN][''] = true;
$allowed_tags[self::SAVED_COMMENT_HTMLCode_CLOSE][''] = true;
$this->buffer = wp_kses( $this->buffer, $allowed_tags );
}
}