viewmodelfacade1.swift

import Foundation

struct Profile: Codable {}

protocol ProfileNetworkFetchable {
    func fetchProfile(completion: @escaping (Result<Profile,NSError>) -> Void)
}

protocol ProfileAnalyticTaggable {
    func tagAnalytics(result: Result<Profile,NSError>)
}

class ProfileNetworker: ProfileNetworkFetchable {
    func fetchProfile(completion: @escaping (Result<Profile,NSError>) -> Void) {
        let url = URL.init(string: "https://www.awesomewebservice.com/profile")!
        let urlRequest = URLRequest(url: url)
        let dataTask = URLSession.shared.dataTask(with: urlRequest) { data, _, _ in
            
            guard let data = data else {
                completion(.failure(NSError()))
                return
            }
            
            guard let profileDecoded = try? JSONDecoder().decode(Profile.self, from: data) else {
                completion(.failure(NSError()))
                return
            }
            
            completion(.success(profileDecoded))
        }
        
        dataTask.resume()
    }
}

class ProfileAnalytic: ProfileAnalyticTaggable {
    func tagAnalytics(result: Result<Profile, NSError>) {
        switch result {
        case .success(_):
            print("trigger analytics with success.......")
        case .failure(_):
            print("trigger analytics with error.........")
        }
    }
}

class ProfileViewModel {
    var profileNetwork: ProfileNetworkFetchable
    var profileTagger: ProfileAnalyticTaggable
    
    init(profileNetwork: ProfileNetworkFetchable, profileTagger: ProfileAnalyticTaggable) {
        self.profileNetwork = profileNetwork
        self.profileTagger = profileTagger
    }
}

extension ProfileViewModel {
    func fetch() {
        profileNetwork.fetchProfile { [weak self] result in
            guard let self = self else {return}
            self.profileTagger.tagAnalytics(result: result)
        }
    }
}