gistfile1.txt

data class User(val id:String, val name:String, val lastName: String, val ttl: Long)

interface UserRepository {
    suspend fun get(id: String) : User
}

class LocalDataSource  {

    val ttlExpiration = 5_000L

    //concurent map?
    private val users = mutableMapOf<String, User>()

    suspend fun getUser(id: String): User? {

        return users[id]?.ttl - datenow().tomillis() < ttlExpiration ?: null : users[id]
    }
}

class RemoteDataSource(val apiClient: UserAPI)  {

    suspend fun getUser(id: String): User? {
        withContext(Dispacher.IO) {
            apiClient.getClientById(id)
        }
    }
}

class UserRepositoryImpl(val localDatasourte: LocalDataSource, val remoteDataSource: RemoteDataSource) : UserRepository {

    
    override suspend fun get(id: String): User {

        withContext(Dispacher.IO) {

            //inMemory
            val currentUser = localDatasourte.getUser(id)

            //inNetwork
            val expired = syste currentUser.ttl

            return@withContext localDatasourte.getUser(id)
        }
    }
}