frootloops

final class AmplitudeProvider: TrackingProviderType {
    private let amplitude = Amplitude()

    func setup() {
        amplitude.initializeApiKey("XXXX-XXXX")
        amplitude.eventUploadPeriodSeconds = 120
    }

    func track(event: TrackingEventType) {
        amplitude.logEvent(event.identifier, withEventProperties: event.properties)

frootloops

protocol TrackingClientType: TrackingProviderType {
    var providers: [TrackingProviderType] { get }
    func add(provider: TrackingProviderType)
}

frootloops

class TrackingClient: TrackingClientType {
    var providers = [TrackingProviderType]()

    func add(provider: TrackingProviderType) {
        providers.append(provider)
    }

    func track(event: TrackingEventType) {
        for provider in providers {
            provider.track(event: event)

frootloops

func application(_ application: UIApplication,  didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool {
    App.trackingClient = TrackingClient()
    App.trackingClient.add(provider: AmplitudeProvider())
    App.trackingClient.add(provider: GoogleProvider())
    App.trackingClient.add(provider: FacebookProvider())
    App.trackingClient.setup()
  
    return true
}

frootloops

let arsen = User(id: "1", name: "Arsen", age: 26)
App.trackingClient.track(event: UserEvents.created(user: arsen))

frootloops

class TestTrackingClient: TrackingClientType {
    var providers = [TrackingProviderType]()
    var events = [TrackingEventType]()

    func track(event: TrackingEventType) {
        events.append(event)
    }
}

frootloops

App.trackingClient = TestTrackingClient()
let productViewController = ProductViewController(product: product)
productViewController.buy()
App.trackingClient.events[0] == UserEvents.bought(product: product)

frootloops

protocol TrackingEventType {
    var identifier: String { get }
    var properties: [String: Any] { get }
}

protocol TrackingProviderType {
    func track(event: TrackingEventType)
    func associate(with user: User)
    func disassociateUser()
    func setup()

frootloops

# This is a comment
nil # is used to represent the absence of a value

true  # A Bool that is true
false # A Bool that is false

10    # Int32
1.0   # Float64

'a' # a Char represents a Unicode code point. It occupies 32 bits.

frootloops

def one
  1
end

proc = ->one
proc.call #=> 1