89 lines
2.1 KiB
C#
89 lines
2.1 KiB
C#
using Foundation;
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namespace Blahblah.Library.Network;
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abstract class ContentTask<T, TResult> : NetworkTask
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{
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public StepHandler<T>? Step { get; set; }
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protected virtual bool AllowDefaultResult => false;
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protected TaskCompletionSource<NetworkResult<TResult>>? taskSource;
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protected long expectedContentLength;
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protected ContentTask(string url, TaskCompletionSource<NetworkResult<TResult>> source, CancellationToken token) : base(url, token)
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{
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taskSource = source ?? throw new ArgumentNullException(nameof(source));
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}
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protected override void OnCancelled()
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{
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taskSource?.TrySetCanceled();
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}
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protected override void OnException(Exception ex)
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{
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taskSource?.TrySetResult(ex);
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}
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public override bool OnResponded(NSHttpUrlResponse response)
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{
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expectedContentLength = response.ExpectedContentLength;
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return true;
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}
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protected virtual T? Update(float progress)
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{
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return default;
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}
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public override void OnReceived(int length)
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{
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if (Step != null)
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{
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if (Data == null)
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{
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Step(0f, default);
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}
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else
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{
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float progress = (float)Data.Length / expectedContentLength;
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var update = Update(progress);
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Step(progress, update);
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}
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}
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}
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protected virtual TResult? Completed(NSHttpUrlResponse? response)
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{
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throw new NotImplementedException();
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}
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protected override void OnCompleted(NSHttpUrlResponse? response)
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{
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try
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{
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var result = Completed(response);
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if (result == null && !AllowDefaultResult)
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{
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throw new NullReferenceException("Result is null");
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}
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taskSource?.TrySetResult(result);
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}
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catch (Exception ex)
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{
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OnException(ex);
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}
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}
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protected override void Disposing()
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{
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if (taskSource?.Task.IsCanceled == false)
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{
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taskSource.TrySetCanceled();
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taskSource = null;
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}
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}
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}
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