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Burgernotes-iOS/Burgernotes/Common/Reach.swift

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2024-02-29 17:38:44 +00:00
// The MIT License (MIT)
//
// Copyright (c) 2015 Isuru Nanayakkara
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//
// This is a version of Reach.swift (swift 5.0) with pull request #15 merged (https://github.com/Isuru-Nanayakkara/Reach/pull/15/)
import Foundation
import SystemConfiguration
let ReachabilityStatusChangedNotification = "ReachabilityStatusChangedNotification"
enum ReachabilityType: CustomStringConvertible {
case wwan
case wiFi
var description: String {
switch self {
case .wwan: return "WWAN"
case .wiFi: return "WiFi"
}
}
}
enum ReachabilityStatus: CustomStringConvertible {
case offline
case online(ReachabilityType)
case unknown
var description: String {
switch self {
case .offline: return "Offline"
case .online(let type): return "Online (\(type))"
case .unknown: return "Unknown"
}
}
}
public class Reach {
func connectionStatus() -> ReachabilityStatus {
var zeroAddress = sockaddr_in()
zeroAddress.sin_len = UInt8(MemoryLayout<sockaddr_in>.size)
zeroAddress.sin_family = sa_family_t(AF_INET)
guard let defaultRouteReachability = withUnsafePointer(to: &zeroAddress, {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
SCNetworkReachabilityCreateWithAddress(nil, $0)
}
}) else {
return .unknown
}
var flags : SCNetworkReachabilityFlags = []
if !SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags) {
return .unknown
}
return ReachabilityStatus(reachabilityFlags: flags)
}
func monitorReachabilityChanges() {
let host = "google.com"
var context = SCNetworkReachabilityContext(version: 0, info: nil, retain: nil, release: nil, copyDescription: nil)
let reachability = SCNetworkReachabilityCreateWithName(nil, host)!
SCNetworkReachabilitySetCallback(reachability, { (_, flags, _) in
let status = ReachabilityStatus(reachabilityFlags: flags)
NotificationCenter.default.post(name: Notification.Name(rawValue: ReachabilityStatusChangedNotification),
object: nil,
userInfo: ["Status": status.description])
}, &context)
SCNetworkReachabilityScheduleWithRunLoop(reachability, CFRunLoopGetMain(), RunLoop.Mode.common as CFString)
}
func isConnectedToNetwork() -> Bool {
Reach().monitorReachabilityChanges()
let status = Reach().connectionStatus()
switch status {
case .unknown, .offline:
return false
case .online(.wwan):
return true
case .online(.wiFi):
return true
}
}
}
extension ReachabilityStatus {
init(reachabilityFlags flags: SCNetworkReachabilityFlags) {
let connectionRequired = flags.contains(.connectionRequired)
let isReachable = flags.contains(.reachable)
let isWWAN = flags.contains(.isWWAN)
if !connectionRequired && isReachable {
if isWWAN {
self = .online(.wwan)
} else {
self = .online(.wiFi)
}
} else {
self = .offline
}
}
}