class File

class File {
    private readonly DOMDocument $dom;
    private readonly DOMElement $contextNode;
    public function __construct(DOMElement $context) {
        $this->dom = $context->ownerDocument;
        $this->contextNode = $context;
    }
    public function totals() : Totals {
        $totalsContainer = $this->contextNode->firstChild;
        if (!$totalsContainer) {
            $totalsContainer = $this->contextNode
                ->appendChild($this->dom
                ->createElementNS('https://schema.phpunit.de/coverage/1.0', 'totals'));
        }
        return new Totals($totalsContainer);
    }
    public function lineCoverage(string $line) : Coverage {
        $coverage = $this->contextNode
            ->getElementsByTagNameNS('https://schema.phpunit.de/coverage/1.0', 'coverage')
            ->item(0);
        if (!$coverage) {
            $coverage = $this->contextNode
                ->appendChild($this->dom
                ->createElementNS('https://schema.phpunit.de/coverage/1.0', 'coverage'));
        }
        $lineNode = $coverage->appendChild($this->dom
            ->createElementNS('https://schema.phpunit.de/coverage/1.0', 'line'));
        return new Coverage($lineNode, $line);
    }
    protected function contextNode() : DOMElement {
        return $this->contextNode;
    }
    protected function dom() : DOMDocument {
        return $this->dom;
    }

}