Passing server response to ViewModel MVVM - swift

Question

I have been trying to pass the response of my AF.request statement to my viewModel but am unable to understand still? I need to pass my response to my ViewModel and then use it to display in the tableView.
This is my Service Class:
Service
class Service {
fileprivate var baseUrl = ""
//https://api.themoviedb.org/3/tv/76479?api_key=3d0cda4466f269e793e9283f6ce0b75e&language=en-US
init(baseUrl: String) {
self.baseUrl = baseUrl
}
var tvShowDetails = TVShowModel()
func getTVShowDeet(completionHandler: #escaping ()-> TVShowModel){
let request = AF.request(self.baseUrl)
.validate()
.responseDecodable(of: TVShowModel.self) { (response) in
guard let tvShow = response.value else {return}
return tvShow
print("printing response", tvShow)
}
}
}
ViewModel
func getTVShowDetails(){
service.getTVShowDeet{
print(self.response)
self.delegate?.reloadTable()
self.headerDelegate?.configureHeader()
print("prinitn respinse in VM", self.response)
}
}
Model
struct TVShowModel : Decodable {
let id : Int?
let original_name : String?
let overview : String?
enum CodingKeys: String, CodingKey {
case id = "id"
case original_name = "original_name"
case overview = "overview"
}
init(){
id = nil
original_name = nil
overview = nil
}
}

Answer 1

Networking requests are asynchronous meaning we don't know when they'll complete so we need to use completion handlers instead of returning from the function (unless you use Async/Await). Something along the lines of this should work:
Service
func getTVShowDeet(completionHandler: #escaping (TVShowModel) -> Void) {
let request = AF.request(self.baseUrl)
.validate()
.responseDecodable(of: TVShowModel.self) { (response) in
guard let tvShow = response.value else { return }
completionHandler(tvShow)
}
}
ViewModel
func getTVShowDetails() {
service.getTVShowDeet { [weak self] tvShow in
// Here you may need to store the tvShow object somewhere to use in your tableView datasource.
self?.delegate?.reloadTable()
self?.headerDelegate?.configureHeader()
}
}