The Emoluments Clauses

The Constitution says that a “person holding any office of profit or trust” cannot accept gifts from any foreign state. In Article II, it also says the president specifically cannot accept gifts from “United States, or any of them.” If Trump businesses profit from a foreign or domestic state, is that a violation of either one of the emolument clauses? It’s hard to say, because there is literally no case law when it comes the emoluments clause. None!