PeopleInSpace/README.md

# PeopleInSpace

Minimal **Kotlin Multiplatform** project using Jetpack Compose and SwiftUI

It makes use of basic API (http://open-notify.org/Open-Notify-API/People-In-Space/) to show list of people currently in
space (inspired by https://kousenit.org/2019/12/19/a-few-astronomical-examples-in-kotlin/)!  The list is shown on Android
using **Jetpack Compose** and on iOS using **SwiftUI**

**Note**: You need to use Android Studio v4.0 (currently on Canary 6).  Have tested on XCode v11.3




### SwiftUI Code

```
struct ContentView: View {
    @ObservedObject var peopleInSpaceViewModel = PeopleInSpaceViewModel(repository: PeopleInSpaceRepository())

    var body: some View {
        NavigationView {
            List(peopleInSpaceViewModel.people, id: \.name) { person in
                PersonView(person: person)
            }
            .navigationBarTitle(Text("PeopleInSpace"), displayMode: .large)
            .onAppear(perform: {
                self.peopleInSpaceViewModel.fetch()
            })
        }
    }
}

struct PersonView : View {
    var person: Assignment

    var body: some View {
        HStack {
            VStack(alignment: .leading) {
                Text(person.name).font(.headline)
                Text(person.craft).font(.subheadline)
            }
        }
    }
```

### Jetpack Compose code

```
class MainActivity : AppCompatActivity() {
    private val peopleInSpaceViewModel: PeopleInSpaceViewModel by viewModel()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            mainLayout(peopleInSpaceViewModel)
        }
    }
}

@Composable
fun mainLayout(peopleInSpaceViewModel: PeopleInSpaceViewModel) {
    MaterialTheme {
        val people = +observe(peopleInSpaceViewModel.peopleInSpace)
        Column {
            people?.forEach { person ->
                Row(person)
            }
        }
    }
}


@Composable
fun Row(person: Assignment) {
    Padding(16.dp) {
        Text(text = "${person.name} (${person.craft})")
    }
}
```



### Languages, libraries and tools used

* [Kotlin](https://kotlinlang.org/)
* [Kotlin Corooutines](https://kotlinlang.org/docs/reference/coroutines-overview.html)
* [Kotlin Serialization](https://github.com/Kotlin/kotlinx.serialization)
* [Ktor client library](https://github.com/ktorio/ktor)
* [Android Architecture Components](https://developer.android.com/topic/libraries/architecture/index.html)
* [Koin](https://github.com/InsertKoinIO/koin)
* [Jetpack Compose](https://developer.android.com/jetpack/compose)
* [SwiftUI](https://developer.apple.com/documentation/swiftui)