public function optimize( $html, $options = array(), $object_id = 0, $object_type = 'post' ) {
        if ( empty( $html ) || ! $object_id ) return $html;

        $blog_id = get_current_blog_id();

        // Cria a subpasta isolada por site e por ID (ex: assets/blog-2/term-22/)
        $this->assets_dir = WP_CONTENT_DIR . '/cache/ftl-enhancer/assets/blog-' . $blog_id . '/' . $object_type . '-' . intval( $object_id ) . '/';
        $this->assets_url = content_url( 'cache/ftl-enhancer/assets/blog-' . $blog_id . '/' . $object_type . '-' . intval( $object_id ) . '/' );
        
        if ( ! file_exists( $this->assets_dir ) ) wp_mkdir_p( $this->assets_dir );

        $dom = new DOMDocument(); libxml_use_internal_errors( true );
        @$dom->loadHTML( mb_convert_encoding( $html, 'HTML-ENTITIES', 'UTF-8' ), LIBXML_NOERROR | LIBXML_NOWARNING );
        libxml_clear_errors(); $xpath = new DOMXPath( $dom );

        $is_auto = isset( $options['auto_unify'] ) && $options['auto_unify'];

        if ( $is_auto ) {
            if ( ! empty( $options['unify_css'] ) ) $this->process_css( $dom, $xpath, $options, true );
            if ( ! empty( $options['unify_js'] ) ) $this->process_js( $dom, $xpath, $options, true );
            if ( ! empty( $options['optimize_images'] ) ) $this->process_images( $xpath, $options, true );
        } else {
            if ( ! empty( $options['selected_css'] ) ) $this->process_css( $dom, $xpath, $options, false );
            if ( ! empty( $options['selected_js'] ) ) $this->process_js( $dom, $xpath, $options, false );
            if ( ! empty( $options['selected_images'] ) ) $this->process_images( $xpath, $options, false );
        }

        $html = $dom->saveHTML();

        if ( ! empty( $options['minify_html'] ) ) {
            $html = preg_replace( '/<!--(?!\s*(?:\[if [^\]]+]|<!|>))(?:(?!-->).)*-->/s', '', $html );
            $html = trim( preg_replace( array( '/\>[^\S ]+/s', '/[^\S ]+\</s', '/(\s)+/s' ), array( '>', '<', '\\1' ), $html ) );
        }

        return $html;
    }<br />
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