SwiftUI Firebase KMP Sample

A sample iOS app using SwiftUI and a Kotlin Multiplatform (KMP) library for Firebase integration (Auth, Firestore, Analytics).

Core Idea

• Shared Logic: Firebase interactions (auth, data, analytics) in Kotlin.
• Native UI: SwiftUI for the iOS frontend.
• Testable: Mock Firebase implementations for KMP and SwiftUI Previews.

Structure

• kotlin-library: KMP module for Firebase logic and CocoaPods dependencies.
  • Interfaces: FirebaseKMP, MockFirebaseKMP.
  • Implementations: FirebaseKMPImpl (real), MockFirebaseKMPImpl (mock).
  • Models: Shared Kotlin data classes (e.g., FirebaseUser).
• iOSApp: SwiftUI application.
  • Consumes kotlin-library.
  • FirebaseService.swift: ObservableObject bridging KMP to SwiftUI (async/await, @Published state).

Features

• Email/Password Authentication (Sign-up, Sign-in, Sign-out).
• Firestore for user profile storage and retrieval.
• Firebase Analytics for event logging.
• SwiftUI Previews with a mocked KMP backend.

Setup & Run

1. Prerequisites: Xcode, Intellij IDEA, CocoaPods.
2. Firebase Project:

• Create a Firebase project.
• Register an iOS app and add GoogleService-Info.plist to iOSApp.
• Enable Email/Password Auth & configure Firestore rules.

3. Build:

• pod install in the iosApp directory.
• Open .xcworkspace in Xcode and run.