def METHOD_NAME(letter_template, user, message):
    fields = letter_template.get_fields()
    context = {f["slug"]: format_html("<mark>{}</mark>", f["label"]) for f in fields}
    context.update(
        {
            "address": format_html(
                "<mark>{}\n{}</mark>", user.get_full_name(), user.address
            ),
            "user": user,
            "today": timezone.now(),
            "preview": True,
            "message": message,
            "foirequest": message.request,
        }
    )
    return context