Location.lastTimeUpdated renamed to lastWeatherUpdateDate and made optional.

1Weather/Model/LocationManager.swift

@@ -21,7 +21,6 @@ public class LocationManager {
         
     private let weatherUpdateSource: WeatherSource
     private let defaultLocation = Location(deviceLocation: false,
-                                           lastTimeUpdated: Date(),
                                            coordinates: .init(latitude: 37.3230, longitude: -122.0322), // Cupertino
                                            timeZone: TimeZone(abbreviation: "PST")!)
     
@@ -93,10 +92,12 @@ public class LocationManager {
             log.warning("Update weather: no location.")
             return
         }
-        guard Date().timeIntervalSince(location.lastTimeUpdated) >= weatherUpdateSource.weatherUpdateInterval else {
-            log.info("Update weather: fresh enough (last updated at \(location.lastTimeUpdated)), skip update.")
+        if let lastTimeUpdated = location.lastWeatherUpdateDate {
+            guard Date().timeIntervalSince(lastTimeUpdated) >= weatherUpdateSource.weatherUpdateInterval else {
+                log.info("Update weather: fresh enough (last updated at \(location.lastWeatherUpdateDate)), skip update.")
                 return
             }
+        }
         log.info("Update weather for location: \(location)")
         
         weatherUpdateSource.updateWeather(for: location) { [weak self] (updatedLocation, error) in
@@ -207,7 +208,7 @@ public class LocationManager {
             log.error("Geo lookup: no coordinates present: \(partialLocation)")
             var location: Location? = nil
             if partialLocation.deviceLocation {
-                location = Location(deviceLocation: true, lastTimeUpdated: Date(timeIntervalSince1970: 0), timeZone: TimeZone.current)
+                location = Location(deviceLocation: true, timeZone: TimeZone.current)
             }
             completion(location)
             return
@@ -236,10 +237,7 @@ public class LocationManager {
                 return
             }
             
-            //TODO: come up with something for the date, or just make it optional (probably makes the most sense)
-            result = Location(deviceLocation: partialLocation.deviceLocation,
-                              lastTimeUpdated: Date(timeIntervalSince1970: 0),
-                              timeZone: timeZone)
+            result = Location(deviceLocation: partialLocation.deviceLocation, timeZone: timeZone)
             result?.coordinates = CLLocationCoordinate2D(latitude: lat, longitude: lon)
             result?.cityName = partialLocation.cityName ?? placemark.locality
             result?.countryName = partialLocation.countryName ?? placemark.country

1Weather/Model/ModelObjects/Location.swift

@@ -12,7 +12,7 @@ public struct Location {
     // MARK: - Data fields
     /// True if this location came from the Device GPS (user's current location). False if it was added in some other way (search, push notification, popular cities, etc.)
     public let deviceLocation: Bool
-    public var lastTimeUpdated: Date
+    public var lastWeatherUpdateDate: Date?
     public var coordinates: CLLocationCoordinate2D?
     public var imageName: String? = "ny_bridge" //we'll possibly need to switch to URL
     
@@ -106,7 +106,7 @@ extension Location: CustomStringConvertible {
 extension Location: UpdatableModelObject {
     public func mergedWith(incrementalChanges: Location) -> Location {
         var result = self
-        result.lastTimeUpdated = incrementalChanges.lastTimeUpdated
+        result.lastWeatherUpdateDate = incrementalChanges.lastWeatherUpdateDate
         // The preference is given to self values rather than incrementalChanges in this class
         result.coordinates = result.coordinates ?? incrementalChanges.coordinates
         result.imageName = result.imageName ?? incrementalChanges.imageName

1Weather/Network/Weather/Model/WdtLocation.swift

@@ -51,7 +51,7 @@ struct WdtLocation: Codable {
         }
         
         return Location(deviceLocation: false,
-                        lastTimeUpdated: updatedAt,
+                        lastWeatherUpdateDate: updatedAt,
                         coordinates: coordinates,
                         imageName: nil,
                         countryCode: nil,