ARK-OS/arkos/arkrt/ark.ui.basic/Sources/Views/Styles/PickerStyle/_BuiltinPickerStyle.swift

/// A built-in picker style backed by a backend-supported picker widget.
public protocol _BuiltinPickerStyle {
    @MainActor
    func _asBackendPickerStyle<Backend: BaseAppBackend>(backend: Backend) -> BackendPickerStyle
}

extension PickerStyle where Self: _BuiltinPickerStyle {
    public func makeView<Value: Equatable>(
        options: [Value],
        selection: Binding<Value?>,
        environment: EnvironmentValues
    ) -> _BuiltinPickerImplementation {
        _BuiltinPickerImplementation(
            style: self._asBackendPickerStyle(backend: environment.backend),
            options: options.map { "\($0)" },
            selectedIndex: Binding {
                selection.wrappedValue.flatMap(options.firstIndex(of:))
            } set: {
                selection.wrappedValue = $0.map { options[$0] }
            }
        )
    }

    public func isSupported<Backend: BaseAppBackend>(backend: Backend) -> Bool {
        backend.supportedPickerStyles.contains(_asBackendPickerStyle(backend: backend))
    }
}