/// <summary>
/// Starts the downloader Task to create chunks and download data into them, package by package.
/// </summary>
/// <returns></returns>
internal Task StartDownloading()
{
int currentPackageIndex = 0;
System.Console.WriteLine("Devhus.Downloader is downloading...");
while (currentPackageIndex < TotalDownloadFilesCount)
{
if (State != AgentState.Busy)
{
break;
}
System.Console.WriteLine("Devhus.Downloader checking queue permission...");
while (QueueProceedPermission == false) /* waits for confirm to start downloading the next file */ } {
System.Console.WriteLine("Devhus.Downloader queue permission is granted!");
if (!DownloaderOptions.AutoQueueHandling)
{
QueueProceedPermission = false;
}
CurrentPacakge = PackageList[currentPackageIndex] ?? null;
if (CurrentPacakge == null || CurrentPacakge.State == PackageState.Completed)
{
System.Console.WriteLine("Devhus.Downloader packge {0} was not found or was completed on download starting!", currentPackageIndex);
currentPackageIndex++;
continue;
}
System.Console.WriteLine("Devhus.Downloader {0} file in {1} package started", CurrentPacakge.MyFile.Name, CurrentPacakge.PackageID);
ParentDownloder.CallDownloadFileStarted(CurrentPacakge);
CurrentPacakge.CreateChunks();
CurrentPacakge.StartDownload();
currentPackageIndex++;
}
if (State != AgentState.Canceled)
{
State = AgentState.Completed;
ParentDownloder.CallDownloadAllComplete();
}
return(Task.FromResult(0));
}
/// <summary>
/// Resume all agent tasks safely.
/// </summary>
internal void Resume()
{
if (CurrentPacakge == null || CurrentPacakge.State != PackageState.Paused)
{
return;
}
CurrentPacakge.State = PackageState.Downloading;
ParentDownloder.State = DownloaderState.Resumed;
DownloadSpeedTracker.Start();
ParentDownloder.CallDownloadResume(CurrentPacakge);
}
/// <summary>
/// Pause all agent tasks safely.
/// </summary>
internal void Pause()
{
if (CurrentPacakge == null || CurrentPacakge.State != PackageState.Downloading)
{
return;
}
CurrentPacakge.State = PackageState.Paused;
ParentDownloder.State = DownloaderState.Paused;
DownloadSpeedTracker.Stop();
ParentDownloder.CallDownloadPause();
}
/// <summary>
/// Begin all agent tasks safely.
/// </summary>
internal async void Begin()
{
if (PackageList.Count == 0)
{
return;
}
System.Console.WriteLine("Devhus.Downloader is beginning...");
State = AgentState.Busy;
ParentDownloder.State = DownloaderState.Started;
ParentDownloder.CallDownloadBegin();
DownloadSpeedTracker.Start();
await StartDownloading();
}
/// <summary>
///
/// </summary>
/// <param name="source"></param>
/// <param name="e"></param>
private void DownloadSpeedTrackerHandler(object source, ElapsedEventArgs e)
{
if (CurrentPacakge != null)
{
var progress = CurrentPacakge.Progress;
if (CurrentPacakge.State != PackageState.Downloading || progress.SpeedBytesMs < 1)
{
return;
}
progress.SecondsRemaining = progress.RemainingBytes / progress.SpeedBytesMs;
ParentDownloder.CallSpeedUpdate(progress);
progress.SpeedBytesMs = 0;
}
}
/// <summary>
/// Stops all agent tasks safely.
/// </summary>
internal void Stop(bool forceStop = false)
{
if (forceStop == false)
{
if (CurrentPacakge == null ||
(CurrentPacakge.State != PackageState.Downloading && CurrentPacakge.State != PackageState.Paused))
{
return;
}
}
CurrentPacakge.State = PackageState.Canceled;
ParentDownloder.State = DownloaderState.Stopped;
State = AgentState.Canceled;
DownloadSpeedTracker.Stop();
ParentDownloder.CallDownloadStop();
}
