1.2.7

Esiur/Core/AsyncReply.cs

@@ -0,0 +1,241 @@
+/*
+ 
+Copyright (c) 2017 Ahmed Kh. Zamil
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+*/
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Esiur.Resource;
+using System.Reflection;
+using System.Threading;
+using System.Runtime.CompilerServices;
+
+namespace Esiur.Core
+{
+    public class AsyncReply<T>: IAsyncReply<T>
+    {
+
+        protected List<Action<T>> callbacks = new List<Action<T>>();
+        protected T result;
+
+        protected List<Action<AsyncException>> errorCallbacks = new List<Action<AsyncException>>();
+        
+        protected List<Action<ProgressType, int, int>> progressCallbacks = new List<Action<ProgressType, int, int>>();
+
+        protected List<Action<T>> chunkCallbacks = new List<Action<T>>();
+
+        //List<AsyncAwaiter> awaiters = new List<AsyncAwaiter>();
+
+        object callbacksLock = new object();
+
+        protected bool resultReady = false;
+        AsyncException exception;
+
+
+        public bool Ready
+        {
+            get { return resultReady; }
+
+        }
+
+        
+
+        public object Result
+        {
+            get { return result; }
+        }
+
+        public IAsyncReply<T> Then(Action<T> callback)
+        {
+            callbacks.Add(callback);
+
+            if (resultReady)
+                callback(result);
+
+            return this;
+        }
+
+        public IAsyncReply<T> Error(Action<AsyncException> callback)
+        {
+            errorCallbacks.Add(callback);
+
+            if (exception != null)
+                callback(exception);
+
+            return this;
+        }
+
+        public IAsyncReply<T> Progress(Action<ProgressType, int, int> callback)
+        {
+            progressCallbacks.Add(callback);
+            return this;
+        }
+
+        
+        public IAsyncReply<T> Chunk(Action<T> callback)
+        {
+            chunkCallbacks.Add(callback);
+            return this;
+        }
+
+        public void Trigger(object result)
+        {
+
+            lock (callbacksLock)
+            {
+                if (resultReady)
+                    return;
+
+                this.result = (T)result;
+                resultReady = true;
+
+                foreach (var cb in callbacks)
+                    cb((T)result);
+
+
+            }
+
+        }
+
+        public void TriggerError(Exception exception)
+        {
+            if (resultReady)
+                return;
+
+            if (exception is AsyncException)
+                this.exception = exception as AsyncException;
+            else
+                this.exception = new AsyncException(ErrorType.Management, 0, exception.Message);
+             
+
+            lock (callbacksLock)
+            {
+                foreach (var cb in errorCallbacks)
+                    cb(this.exception);
+            }
+
+        }
+
+        public void TriggerProgress(ProgressType type, int value, int max)
+        {
+            if (resultReady)
+                return;
+
+            lock (callbacksLock)
+            {
+                foreach (var cb in progressCallbacks)
+                    cb(type, value, max);
+
+            }
+        }
+
+        
+        public void TriggerChunk(object value)
+        {
+            if (resultReady)
+                return;
+
+            lock (callbacksLock)
+            {
+                foreach (var cb in chunkCallbacks)
+                    cb((T)value);
+
+            }
+        }
+
+        public AsyncAwaiter<T> GetAwaiter()
+        {
+            return new AsyncAwaiter<T>(this);
+        }
+
+    
+
+
+
+        public AsyncReply()
+        {
+
+        }
+
+        public AsyncReply(T result)
+        {
+            resultReady = true;
+            this.result = result;
+        }
+    
+        /*
+    public AsyncReply<T> Then(Action<T> callback)
+        {
+           base.Then(new Action<object>(o => callback((T)o)));
+            return this;
+        }
+
+        public void Trigger(T result)
+        {
+            Trigger((object)result);
+        }
+
+        public Task<bool> MoveNext(CancellationToken cancellationToken)
+        {
+            throw new NotImplementedException();
+        }
+
+        public void Dispose()
+        {
+         }
+
+        public AsyncReply()
+        {
+            
+        }
+
+        public new Task<T> Task
+        {
+            get
+            {
+                return base.Task.ContinueWith<T>((t) =>
+                {
+
+#if NETSTANDARD1_5
+                    return (T)t.GetType().GetTypeInfo().GetProperty("Result").GetValue(t);
+#else
+                    return (T)t.GetType().GetProperty("Result").GetValue(t);
+#endif
+                });
+            }
+        }
+
+        public T Current => throw new NotImplementedException();
+
+        public AsyncReply(T result)
+            : base(result)
+        {
+
+        }
+
+ */
+
+    }
+}