Network reachability helper with Combine and Alamofire

NetworkReachabilityHelper.swift

import Alamofire
import Combine

final class NetworkReachabilityHelper {
    static let shared = NetworkReachabilityHelper()

    private enum Constants {
        static let host = "api1.\(Environment.domain)"
    }

    let networkStatus = PassthroughSubject<NetworkReachabilityManager.NetworkReachabilityStatus, Error>()
    var reachability = NetworkReachabilityManager(host: Constants.host)

    var isReachableOnCellular: Bool {
        get {
            return reachability?.isReachableOnCellular ?? false
        }
    }

    var isReachableOnEthernetOrWiFi: Bool {
        get {
            return reachability?.isReachableOnEthernetOrWiFi ?? false
        }
    }

    var isReachable: Bool {
        get {
            return reachability?.isReachable ?? false
        }
    }

    func startListening() {
        reachability?.startListening { [weak self] status in
            self?.networkStatus.send(status)
        }
    }

    func stopListening() {
        reachability?.stopListening()
    }

    deinit {
        stopListening()
    }
}