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using MediaBrowser.Common.Kernel;
using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.Threading;
using System.Threading.Tasks;
namespace MediaBrowser.Common.ScheduledTasks.Tasks
{
/// <summary>
/// Plugin Update Task
/// </summary>
[Export(typeof(IScheduledTask))]
public class SystemUpdateTask : BaseScheduledTask<IKernel>
{
/// <summary>
/// The _app host
/// </summary>
private readonly IApplicationHost _appHost;
/// <summary>
/// Initializes a new instance of the <see cref="SystemUpdateTask" /> class.
/// </summary>
/// <param name="appHost">The app host.</param>
[ImportingConstructor]
public SystemUpdateTask([Import("appHost")] IApplicationHost appHost)
{
_appHost = appHost;
}
/// <summary>
/// Creates the triggers that define when the task will run
/// </summary>
/// <returns>IEnumerable{BaseTaskTrigger}.</returns>
protected override IEnumerable<BaseTaskTrigger> GetDefaultTriggers()
{
return new BaseTaskTrigger[] {
// 1am
new DailyTrigger { TimeOfDay = TimeSpan.FromHours(1) },
new IntervalTrigger { Interval = TimeSpan.FromHours(2)}
};
}
/// <summary>
/// Returns the task to be executed
/// </summary>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="progress">The progress.</param>
/// <returns>Task.</returns>
protected override async Task ExecuteInternal(CancellationToken cancellationToken, IProgress<double> progress)
{
if (!_appHost.CanSelfUpdate) return;
EventHandler<double> innerProgressHandler = (sender, e) => progress.Report(e * .1);
// Create a progress object for the update check
var innerProgress = new Progress<double>();
innerProgress.ProgressChanged += innerProgressHandler;
var updateInfo = await _appHost.CheckForApplicationUpdate(cancellationToken, innerProgress).ConfigureAwait(false);
// Release the event handler
innerProgress.ProgressChanged -= innerProgressHandler;
progress.Report(10);
if (!updateInfo.IsUpdateAvailable)
{
progress.Report(100);
return;
}
cancellationToken.ThrowIfCancellationRequested();
if (Kernel.Configuration.EnableAutoUpdate)
{
Logger.Info("Update Revision {0} available. Updating...", updateInfo.AvailableVersion);
innerProgressHandler = (sender, e) => progress.Report((e * .9) + .1);
innerProgress = new Progress<double>();
innerProgress.ProgressChanged += innerProgressHandler;
await _appHost.UpdateApplication(cancellationToken, innerProgress).ConfigureAwait(false);
// Release the event handler
innerProgress.ProgressChanged -= innerProgressHandler;
Kernel.OnApplicationUpdated(updateInfo.AvailableVersion);
}
else
{
Logger.Info("A new version of Media Browser is available.");
}
progress.Report(100);
}
/// <summary>
/// Gets the name of the task
/// </summary>
/// <value>The name.</value>
public override string Name
{
get { return "Check for application updates"; }
}
/// <summary>
/// Gets the description.
/// </summary>
/// <value>The description.</value>
public override string Description
{
get { return "Downloads and installs application updates."; }
}
}
}
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