UniRx 에셋 추가

Gameton-06/Assets/Plugins/UniRx/Scripts/Operators/ContinueWith.cs

@@ -0,0 +1,77 @@
+using System;
+
+namespace UniRx.Operators
+{
+    internal class ContinueWithObservable<TSource, TResult> : OperatorObservableBase<TResult>
+    {
+        readonly IObservable<TSource> source;
+        readonly Func<TSource, IObservable<TResult>> selector;
+
+        public ContinueWithObservable(IObservable<TSource> source, Func<TSource, IObservable<TResult>> selector)
+            : base(source.IsRequiredSubscribeOnCurrentThread())
+        {
+            this.source = source;
+            this.selector = selector;
+        }
+
+        protected override IDisposable SubscribeCore(IObserver<TResult> observer, IDisposable cancel)
+        {
+            return new ContinueWith(this, observer, cancel).Run();
+        }
+
+        class ContinueWith : OperatorObserverBase<TSource, TResult>
+        {
+            readonly ContinueWithObservable<TSource, TResult> parent;
+            readonly SerialDisposable serialDisposable = new SerialDisposable();
+
+            bool seenValue;
+            TSource lastValue;
+
+            public ContinueWith(ContinueWithObservable<TSource, TResult> parent, IObserver<TResult> observer, IDisposable cancel) : base(observer, cancel)
+            {
+                this.parent = parent;
+            }
+
+            public IDisposable Run()
+            {
+                var sourceDisposable = new SingleAssignmentDisposable();
+                serialDisposable.Disposable = sourceDisposable;
+
+                sourceDisposable.Disposable = parent.source.Subscribe(this);
+                return serialDisposable;
+            }
+
+            public override void OnNext(TSource value)
+            {
+                this.seenValue = true;
+                this.lastValue = value;
+            }
+
+            public override void OnError(Exception error)
+            {
+                try { observer.OnError(error); } finally { Dispose(); };
+            }
+
+            public override void OnCompleted()
+            {
+                if (seenValue)
+                {
+                    try
+	                {
+		                var v = parent.selector(lastValue);
+		                // dispose source subscription
+		                serialDisposable.Disposable = v.Subscribe(observer);
+	                }
+	                catch (Exception error)
+	                {
+		                OnError(error);
+	                }
+                }
+                else
+                {
+                    try { observer.OnCompleted(); } finally { Dispose(); };
+                }
+            }
+        }
+    }
+}