Transform .docx document generated with PhpOffice\PhpWord\TemplateProcessor to .odt format

Question

We generate documents using PhpOffice\PhpWord\TemplateProcessor's templates. Now client wants to change format to .odt.

How can we do that without rewriting the whole function, or at least using a similar template approach (we create a word with variables and then programatically fill it with values from the database)?

TemplateProcessor seems to only work with .docx documents.

 \PhpOffice\PhpWord\Settings::setOutputEscapingEnabled(true);
 $doc = new TemplateProcessor(resource_path('path/to/document.docx'));

 $doc->setValue('random_index1', $data['random_index1']);
 $doc->setValue('random_index2', $data['random_index2']);

 $filePath = tempnam(sys_get_temp_dir(), 'PHPWord');
 $tempFile = $doc->saveAs($filePath);