How can I use function calling on functions with different inputs

API
,
1

I have noticed openAI changed how they give back the function to be called. Before, it was a string.
I have several functions to call. Some of them use local variables. Therefore, I have used ifs.
The issue is, now the function to be called is a function type.

if(functionToCall==="get_blog_post"){                        
                        functionResponse = await functionToCall(question);
                    }

Example of what I did given.
I am trying to make my code work again, with no success.

I know we can enumate the inputs. Nonetheless, those inputs are actually local variables!