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package moe.yuuta.workmode.async
import android.annotation.SuppressLint
import android.os.AsyncTask
object Async {
fun <T> beginTask(runnable: Runnable<T>, callback: Callback<T>): Stoppable {
val task = @SuppressLint("StaticFieldLeak")
object : AsyncTask<Void, Void, TaskResult<T>>() {
override fun onPostExecute(result: TaskResult<T>) {
callback.onStop(result.successful, result.result, result.e)
}
override fun doInBackground(vararg params: Void?): TaskResult<T> {
try {
return TaskResult(true, runnable.run(), null)
} catch (e: Throwable) {
return TaskResult(false, null, e)
}
}
override fun onPreExecute() {
callback.onStart()
}
}
val stoppable = object : Stoppable {
override fun stop() {
if (!isStopped()) task.cancel(true)
}
override fun isStopped(): Boolean = task.isCancelled
}
task.execute()
return stoppable
}
}
@FunctionalInterface
interface Runnable<T> {
fun run(): T?
}
data class TaskResult<T>(
val successful: Boolean,
val result: T?,
val e: Throwable?
)
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