GetStockByTickerUseCase.kt

class GetStockByTickerUseCase @Inject constructor(
    private val repository: StockListRepository,
    schedulersFactory: SchedulersFactory
) : MaybeUseCase<Stock>(schedulersFactory) {

    override fun sourceImpl(params: Params): Maybe<Stock> =
        params.processMaybe(PARAM_TICKER, repository::stock)

    companion object {
        const val PARAM_TICKER = "ticker"
    }
}