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abstract class CallbackImpl(val callBack: CallBack<Any>): CallBack<Any> {
override fun onResult(result: Any?) {
val cb = callBack
while (true) {
val outcome = invoke(result)
if (outcome === CALLBACK_FLAG) {
return
}
cb.onResult(outcome)
return
}
}
protected abstract fun invoke(result: Any?): Any?
}
val CALLBACK_FLAG = CoroutineSingletons.CALLBACK
enum class CoroutineSingletons { CALLBACK }
interface CallBack<T> {
fun onResult(result: T?)
}
object UserInfoHelper {
fun launch() {
Log.e("MainActivity", "launch run")
requestUserCallback(object : CallBack<Any> {
override fun onResult(result: Any?) {
Log.e("MainActivity", "launch result: $result")
}
})
}
val handler = Handler(Looper.getMainLooper())
private fun delay(timeMillis: Long, callBack: CallBack<Any>): Any {
handler.postDelayed({
callBack.onResult(Unit)
}, timeMillis)
return CALLBACK_FLAG
}
private var userCallback:UserCallback? = null
abstract class UserCallback(callBack: CallBack<Any>) : CallbackImpl(callBack) {
var result: Any? = null
var flag: Int = 0
}
fun requestUserCallback(callBack: CallBack<Any>): Any {
val cb = if (userCallback == null) {
val c = object : UserCallback(callBack) {
override fun invoke(result: Any?): Any? {
this.result = result
++flag
return requestUserCallback(this)
}
}
userCallback = c
c
}else {
userCallback!!
}
var returnResult = cb.result
when (cb.flag) {
0 -> {
if (requestFriendListCallback(cb) == CALLBACK_FLAG) {
return CALLBACK_FLAG
}
}
1 -> {
returnResult = cb.result
}
}
return "user: $returnResult"
}
var requestFriendListCallback: RequestFriendListCallback? = null
abstract class RequestFriendListCallback(callBack: CallBack<Any>) : CallbackImpl(callBack) {
var result: Any? = null
var flag: Int = 0
}
fun requestFriendListCallback(callBack: CallBack<Any>): Any {
val cb = if ( requestFriendListCallback == null) {
val c = object : RequestFriendListCallback(callBack) {
override fun invoke(result: Any?): Any? {
this.result = result
++flag
return requestFriendListCallback(this)
}
}
requestFriendListCallback = c
c
} else {
requestFriendListCallback!!
}
when (cb.flag) {
0 -> {
if (delay(3000, cb) == CALLBACK_FLAG) {
return CALLBACK_FLAG
}
}
1 -> {
}
}
return "friendList"
}
}
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