Hands-On Design Patterns with Swift

Using classes as adapters

The adapter pattern makes use of classes to wrap the functionality of immutable interfaces, such as the two libraries we are using:

public class MixPanelTrackingAdapter: Tracking {

Wrap the Mixpanel mainInstance, as follows:

    private let mixpanel = Mixpanel.mainInstance()

Next, expose the required methods from the Tracking protocol:

    public func record(event: String, properties: [String : String]?) {        mixpanel.track(event: event, properties: properties)    }}

For Google Analytics for Firebase, it's even more trivial, as there is no singleton to wrap:

public class FirebaseTrackingAdapter: Tracking {    public func record(event: String, properties: [String : String]?) {        Analytics.logEvent(event, parameters: properties) } ...