Fix compilation issues & cleanup (#29)

* Get it compiling again & cleanup

* Update example & analytics version

Author: bsneed

Example/BasicExample/BasicExample.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -19,7 +19,7 @@ let package = Package(
     dependencies: [
         // Dependencies declare other packages that this package depends on.
         // .package(url: /* package url */, from: "1.0.0"),
-        .package(url: "https://github.com/segmentio/analytics-swift.git", from: "1.5.9")
+        .package(url: "https://github.com/segmentio/analytics-swift.git", from: "1.6.0")
     ],
     targets: [
         // Targets are the basic building blocks of a package. A target can define a module or a test suite.

Package.resolved

@@ -48,22 +48,23 @@ public class AmplitudeSession: EventPlugin, iOSLifecycle {
     private var storage = Storage()
 
     internal var eventSessionID: Int64 = -1
-    @Atomic internal var sessionID: Int64 {
+    @Atomic internal var sessionID: Int64 = -1 {
         didSet {
             storage.write(key: Storage.Constants.previousSessionID, value: sessionID)
             debugLog("sessionID set to: \(sessionID)")
         }
     }
 
-    @Atomic internal var lastEventTime: Int64 {
+    @Atomic internal var lastEventTime: Int64 = -1 {
         didSet {
             storage.write(key: Storage.Constants.lastEventTime, value: lastEventTime)
         }
     }
 
     public init() {
-        self.sessionID = storage.read(key: Storage.Constants.previousSessionID) ?? -1
-        self.lastEventTime = storage.read(key: Storage.Constants.lastEventTime) ?? -1
+        _sessionID.set(storage.read(key: Storage.Constants.previousSessionID) ?? -1)
+        _lastEventTime.set(storage.read(key: Storage.Constants.lastEventTime) ?? -1)
+        
         debugLog("startup sessionID = \(sessionID)")
     }
 
@@ -81,9 +82,9 @@ public class AmplitudeSession: EventPlugin, iOSLifecycle {
         if type != .initial { return }
 
         if settings.hasIntegrationSettings(key: key) {
-            active = true
+            _active.set(true)
         } else {
-            active = false
+            _active.set(false)
         }
     }
 
@@ -118,7 +119,7 @@ public class AmplitudeSession: EventPlugin, iOSLifecycle {
 
             // if it's a start event, set a new sessionID
             if eventName == Constants.ampSessionStartEvent {
-                resetPending = false
+                _resetPending.set(false)
                 eventSessionID = sessionID
                 debugLog("NewSession = \(eventSessionID)")
             }
@@ -137,7 +138,7 @@ public class AmplitudeSession: EventPlugin, iOSLifecycle {
             workingEvent = trackEvent as? T
         }
 
-        lastEventTime = newTimestamp()
+        _lastEventTime.set(newTimestamp())
         return workingEvent
     }
 
@@ -152,7 +153,7 @@ public class AmplitudeSession: EventPlugin, iOSLifecycle {
 
     public func applicationWillResignActive(application: UIApplication?) {
         debugLog("Background: \(eventSessionID)")
-        lastEventTime = newTimestamp()
+        _lastEventTime.set(newTimestamp())
     }
 }
 
@@ -192,8 +193,8 @@ extension AmplitudeSession {
 
     private func startNewSession() {
         if resetPending { return }
-        resetPending = true
-        sessionID = newTimestamp()
+        _resetPending.set(true)
+        _sessionID.set(newTimestamp())
         if eventSessionID == -1 {
             // we only wanna do this if we had nothing before, so each
             // event actually HAS a sessionID of some kind associated.
@@ -217,7 +218,7 @@ extension AmplitudeSession {
         }
 
         // we'll consider this our new lastEventTime
-        lastEventTime = timestamp
+        _lastEventTime.set(timestamp)
         // end previous session
         endSession()
         // start new session