Dissecando coroutines 3

suspend fun queryUser(id: Int): User {
    delay(500) // simulando latência de rede ou outra operação lenta
    return User(id = id, name = "gente.firme", email = "talentos@movile.com", phone = 5511000000000L)
}

suspend fun sendEmail(destination: String, body: String): Boolean {
    println("Sending email to $destination with body: $body")
    delay(1000) // simulando um request/operação lenta
    val couldSentEmail = Random().nextBoolean()
    if (couldSentEmail) {
        println("Successfully sent email!")
    } else {
        println("Uh, something went terribly wrong")
    }
    return couldSentEmail
}

suspend fun sendSMS(destination: Long, message: String): Boolean {
    println("Sending sms to $destination with message: $message")
    delay(500) // simulando um request/operação lenta
    println("Successfully sent SMS!")
    return true
}

suspend fun sendMessageToUser(userId: Int, message: String) {
    val user = queryUser(userId)
    val emailStatus = sendEmail(user.email, message)
    if (!emailStatus) {
        sendSMS(user.phone, message)
    }
}