iOS14-WidgetKit-DataFetcher.swift

public class DataFetcher : ObservableObject{
    
    var cancellable : Set<AnyCancellable> = Set()
    
    static let shared = DataFetcher()
    
    func getJokes(completion: @escaping ([ChuckValue]?) -> Void){
        
        let urlComponents = URLComponents(string: "http://api.icndb.com/jokes/random/10/")!
        
        URLSession.shared.dataTaskPublisher(for: urlComponents.url!)
            .map{$0.data}
            .decode(type: ChuckJokes.self, decoder: JSONDecoder())
            .eraseToAnyPublisher()
            .receive(on: DispatchQueue.main)
            .sink(receiveCompletion: { completion in
 
        }) { response in
            completion(response.value)
        }
        .store(in: &cancellable)
    }
}