Commit

Carthage/Checkouts/TrueTime.swift/Sources/ReferenceTime.swift

@@ -0,0 +1,66 @@
+//
+//  FrozenReferenceTime.swift
+//  TrueTime
+//
+//  Created by Michael Sanders on 10/26/16.
+//  Copyright © 2016 Instacart. All rights reserved.
+//
+
+typealias FrozenTimeResult = Result<FrozenTime, NSError>
+typealias FrozenTimeCallback = (FrozenTimeResult) -> Void
+
+typealias FrozenNetworkTimeResult = Result<FrozenNetworkTime, NSError>
+typealias FrozenNetworkTimeCallback = (FrozenNetworkTimeResult) -> Void
+
+protocol FrozenTime {
+    var time: Date { get }
+    var uptime: timeval { get }
+}
+
+struct FrozenReferenceTime: FrozenTime {
+    let time: Date
+    let uptime: timeval
+}
+
+struct FrozenNetworkTime: FrozenTime {
+    let time: Date
+    let uptime: timeval
+    let serverResponse: NTPResponse
+    let startTime: ntp_time_t
+    let sampleSize: Int?
+    let host: String?
+
+    init(time: Date,
+         uptime: timeval,
+         serverResponse: NTPResponse,
+         startTime: ntp_time_t,
+         sampleSize: Int? = 0,
+         host: String? = nil) {
+        self.time = time
+        self.uptime = uptime
+        self.serverResponse = serverResponse
+        self.startTime = startTime
+        self.sampleSize = sampleSize
+        self.host = host
+    }
+
+    init(networkTime time: FrozenNetworkTime, sampleSize: Int, host: String) {
+        self.init(time: time.time,
+                  uptime: time.uptime,
+                  serverResponse: time.serverResponse,
+                  startTime: time.startTime,
+                  sampleSize: sampleSize,
+                  host: host)
+    }
+}
+
+extension FrozenTime {
+    var uptimeInterval: TimeInterval {
+        let currentUptime = timeval.uptime()
+        return TimeInterval(milliseconds: currentUptime.milliseconds - uptime.milliseconds)
+    }
+
+    func now() -> Date {
+        return time.addingTimeInterval(uptimeInterval)
+    }
+}