Extracting parts of filenames per macro in file templates

I'm just starting a small AngularJS 2.0 project and wanted to create some file templates for Angular components and services. I adopted the naming conventions for files from the Angular quickstart tutorial. They use the pattern <identifier>.<component | service | module>.ts. I want to extract the part before the first dot for generating the class name and, for example, the components selector. As far as i can see this is not possible today with the standard templates.

Do you provide an opportunity to write custom macros and embed them in the Template Explorer?

Best Regards

Andreas