Enums and State in Kotlin

enums.kt

fun main() {
   
    Repository.startFetch()
    getResult(Repository.getCurrentState())
    Repository.finishFetch()
    getResult(Repository.getCurrentState())
    Repository.error()
    getResult(Repository.getCurrentState())
}

fun getResult(result: Result) {
    return when(result) {
        Result.SUCCESS -> println("Success")
        Result.FAILURE -> println("Failure")
        Result.ERROR -> println("Error!")
		Result.IDLE -> println("Idle")
		Result.PENDING -> println("Pending")
    }
}

// This is a singleton class, there'll always be 
// only one instance of this class.
object Repository {
    private var loadState: Result = Result.IDLE
    private var dataFetched: String? = null
    
    fun startFetch() {
        loadState = Result.PENDING
        dataFetched = "Data"
    }
    
    fun finishFetch() {
        loadState = Result.SUCCESS
        dataFetched = null
    }
    
    fun error() {
        loadState = Result.ERROR
    }
    
    fun getCurrentState(): Result {
        return loadState
    }
    
}

enum class Result {
    SUCCESS,
    FAILURE,
    ERROR,
    PENDING,
    IDLE
}