Dactyloidae iOS initial commit

mobile/ios/ThirdParty/Reachability.swift

@@ -0,0 +1,115 @@
+// 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.
+
+
+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"
+        }
+    }
+}
+
+open class Reach {
+
+    func connectionStatus() -> ReachabilityStatus {
+        var zeroAddress = sockaddr_in()
+        zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
+        zeroAddress.sin_family = sa_family_t(AF_INET)
+
+        guard let defaultRouteReachability = withUnsafePointer(to: &zeroAddress, {
+            $0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
+                SCNetworkReachabilityCreateWithAddress(kCFAllocatorDefault, $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(), CFRunLoopMode.commonModes.rawValue)
+    }
+
+}
+
+extension ReachabilityStatus {
+    fileprivate 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
+        }
+    }
+}