initial commit

.gitignore

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+# macOS
+.DS_Store
+
+# Xcode
+build/
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+xcuserdata/
+*.xccheckout
+*.moved-aside
+DerivedData
+*.hmap
+*.ipa
+
+# Bundler
+.bundle
+
+# Add this line if you want to avoid checking in source code from Carthage dependencies.
+# Carthage/Checkouts
+
+Carthage/Build
+
+# We recommend against adding the Pods directory to your .gitignore. However
+# you should judge for yourself, the pros and cons are mentioned at:
+# https://guides.cocoapods.org/using/using-cocoapods.html#should-i-ignore-the-pods-directory-in-source-control
+# 
+# Note: if you ignore the Pods directory, make sure to uncomment
+# `pod install` in .travis.yml
+#
+# Pods/

Documentation/AppTasks.md

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+
+## Overview
+Additions library provides an ordered way to perform application boot tasks. The main components of the boot process are:
+
+* [AppTasks](#apptasks)
+* [ServiceProvider](#serviceprovider)
+* [AppTask](#apptask)
+* [NoOpTask](#nooptask)
+
+Here's example sequence diagram from an app launched using `AppTasks`:
+
+![AppTasks sequence example diagram](Assets/AppTaskLaunchSequenceDiagram.jpeg)
+
+To understand better each step, keep on reading.
+
+## AppTasks
+### Description
+`AppTasks` provides an object that manages setup tasks when booting the application. When setup tasks are running, it buffers `AppDelegate` delegate method calls, when setup tasks are finished, it forwards buffered `AppDelegate` calls, and it keeps sending further `AppDelegate` calls to observing tasks.
+
+### Example
+You must create this object on your `SceneDelegate` or `AppDelegate` in order to forward application events.
+
+```swift
+class AppDelegate: UIResponder, UIApplicationDelegate {
+
+  private var appServices = AppServices()
+	/// In this case we are getting an instance of `AppTasks` by building it, but after it is built, we can also get it by calling: `AppTasks.shared`
+	private lazy var tasks = AppTasks.build(serviceProviders: [AdditionsServices(), appServices]) {
+        print("all tasks completed")
+    }
+	func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
+
+		/// Calls to `didFinishLaunching` and other delegate methods must be redirected to the array of `tasks` we received from building an `AppTasks` object, so that they can be buffered and forwarded to the currently registered tasks. We will do the same for all `AppDeleagte` delegate calls.
+		tasks.forEach {
+			_ = $0.application?(application, didFinishLaunchingWithOptions: launchOptions)
+		}
+		return true
+	}
+}
+```
+
+## ServiceProvider
+### Description
+To take advantage of the `ServiceLocator` that `Additions` provides, you must create a subclass of `ServiceProvider`. It is in charge of building the necessary components for `AppTasks` to work.
+
+It is also where we’ll define in which order tasks must be ran.
+
+### Example
+```swift
+import Additions
+
+class AppServices: ServiceProvider {
+	private lazy var onboardingScreenTask = OnboardingScreenTask()
+	private lazy var homeScreenTask = HomeScreenTask()
+	private lazy var pushNotoificationTask = PushNotoificationTask()
+
+	lazy var appTasks: [AppTask] = {
+		/// We need to present onboarding screens before showing the home screen, so we add a dependency from `homeScreenTask` to `onboardingScreenTask` this way, `homeScreenTask` won't be ran until `onboardingScreenTask` calls the `setFinished()` method.
+		homeScreenTask.addDependency(onboardingScreenTask)
+		return [
+			onboardingScreenTask,
+		 	homeScreenTask, 
+			pushNotoificationTask
+		]
+	}()
+
+	/// `modules` method implementation is required by the `ServiceLoactor` protocol.
+	func modules() -> [Register] {
+		/// If we want to use `@Inject` to have the stored instance of a task injected to an other class, we can do so by registering it with the `ServiceLocator`.
+		return [
+			Register { homeScreenTask }
+		]
+	}
+}
+```
+
+## AppTask
+### Description
+An `AppTask` is some kind of setup task that needs to be performed before any `AppDelegate` delegate call is performed.
+
+To create an `AppTask` you must provide an object that conforms to `AppTask` , overrides its `main()` method, and calls `setFinished()` when it finishes the process.
+
+### Example
+
+```swift
+/// Conform to `AppTask`
+class OnboardingScreenTask: AppTask {
+	private let onboardingNavigator: OnboardingNavigator
+	init(onboardingNavigator: OnboardingNavigator) { ... }
+
+	/// Override `main()`
+	override func main() {
+		/// Presents onboarding screens
+		onboardingNavigator.navigate(completion: {
+			/// Call `setFinisehd()` when onboarding is completed.
+			self.setFinished()
+		})
+	}
+}
+```
+
+### NoOpTask
+
+### Description
+
+A `NoOpTask` is a task that finishes immediately. The use of this kind of task is to receive and react to `AppDelegate` delegate calls. It will keep receiving these events throught the app’s lifecycle.
+
+### Example
+
+```swift
+/// Conform to `AppTask`
+class PushNotoificationTask: NoOpTask {
+	private let pushService: PushService
+	init(pushService: PushService) { ... }
+	func application(
+		_ application: UIApplication, 
+		didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
+		pushService.application(
+			application, 
+			didRegisterForRemoteNotificationsWithDeviceToken: deviceToken
+		)
+	}
+}
+```

Example/Podfile

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+use_frameworks!
+
+platform :ios, '13.0'
+
+target 'SwiftAdditions_Example' do
+  pod 'SwiftAdditions', :path => '../'
+
+  target 'SwiftAdditions_ExampleTests' do
+    inherit! :search_paths
+
+
+  end
+end