Firebase Remote Config

RemoteConfigManager.swift

import Foundation
import Firebase

struct RemoteConfigModel {
    var url: String?
    var forceUpdate: String?
    var version: String?
}

final class RemoteConfigManager {
    
    static var shared: RemoteConfigManager = RemoteConfigManager()
    private var remoteConfig = RemoteConfig.remoteConfig()
    
    func fetchRemoteConfig(completion: ((RemoteConfigModel?) -> ())?) {
        remoteConfig.fetch(withExpirationDuration: 0) { [unowned self] (status, error) in
            if status == .success {
                print("Config fetched!")
                self.remoteConfig.activate(completion: nil)
                self.configValues(completion: completion)
            } else {
                print("Config not fetched")
                print("Error: \(error?.localizedDescription ?? "No error available.")")
            }
        }
    }
    
    private func configValues(completion: ((RemoteConfigModel?) -> ())?) {
        let forceUpdate = remoteConfig.configValue(forKey: "force_update").stringValue
        let url = remoteConfig.configValue(forKey: "url_ios").stringValue
        let version = remoteConfig.configValue(forKey: "version_ios").stringValue
        let config = RemoteConfigModel(url: url, forceUpdate: forceUpdate, version: version)
        completion?(config)
    }
}