Error Handling 2

ErrorHandling2.swift

private func trackAnalytic<T: AnalyticsParameter>(event: AnalyticsEvent, parameters: T?) {
    if event.supportedTrackers.isEmpty {
        failureHandler.failure("Event \(event.name) does not have any supported EventTrackers.")
        return
    }
    
    for trackerKey in event.supportedTrackers {
        if let eventTracker = eventTrackers[trackerKey] {
            if eventTracker.isEventNameSupported(event: event.name) {
                if let parameters = parameters, !parameters.isEmpty() {
                    eventTracker.track(event: event.name, with: parameters)
                } else {
                    eventTracker.track(event: event.name)
                }
            } else {
                failureHandler.failure("Event \(event.name) is not a supported event by the EventTracker \(trackerKey.name).")
            }
        } else {
            failureHandler.failure("Event \(event.name) supported tracker \(trackerKey.name) has not been added to Analytics. " +
                "To fix this you must call Analytics.shared.addEventTracker(key: \(trackerKey.name), tracker: \(trackerKey.name)Tracker()" +
                "before tracking an event that is supported by that EventTracker.")
        }
    }
}