DefaultStockListInteractor.kt

class DefaultStockListInteractor @Inject constructor(
    private val getStocksUseCase: GetStocksUseCase,
    private val getStockByTickerUseCase: GetStockByTickerUseCase
) : StockListInteractor {

    override fun stocks(): Single<List<Stock>> = getStocksUseCase.source()

    override fun stock(ticker: String): Maybe<Stock> =
        getStockByTickerUseCase.source {
            GetStockByTickerUseCase.PARAM_TICKER of ticker
        }
}