1.3.0

src/Core/AsyncReply.js

@@ -0,0 +1,160 @@
+/*
+* 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.
+*/
+
+/** 
+ * Created by Ahmed Zamil on 25/07/2017.
+ */
+
+"use strict";  
+
+import AsyncException from './AsyncException.js';
+
+export default class AsyncReply extends Promise
+{
+    then(callback)
+    {
+        this.callbacks.push(callback);
+        
+        if (this.ready)
+            callback(this.result, this);
+
+        return this;
+    }
+
+    // Alias for then()
+    done(callback)
+    {
+        this.then(callback);
+    }
+
+    // Alias for error()
+    catch(callback)
+    {
+        return this.error(callback);
+    }
+        
+    error(callback)
+    {
+        this.errorCallbacks.push(callback);
+
+        if (this.exception.raised)
+        {
+            callback(this.exception);            
+        }
+
+        return this;
+    }
+
+    progress(callback)
+    {
+        this.progressCallbacks.push(callback);
+        return this;
+    }
+
+    chunk(callback)
+    {
+        this.chunkCallbacks.push(callback);
+        return this;
+    }
+
+    // Alias for chunk()
+    next(callback)
+    {
+        this.chunk(callback);
+    }
+
+    trigger(result)
+    {
+        this.result = result;
+        this.ready = true;
+
+        for(var i = 0; i < this.callbacks.length; i++)
+            this.callbacks[i](result, this);        
+    }
+
+
+    triggerError(type, code, message)
+    {
+        if (this.ready)
+            return;
+
+        if (type instanceof AsyncException)
+            this.exception.raise(type.type, type.code, type.message);
+        else
+            this.exception.raise(type, code, message);
+
+        if (this.errorCallbacks.length == 0)
+            throw this.exception;
+        else
+            for(var i = 0; i < this.errorCallbacks.length; i++)
+                this.errorCallbacks[i](this.exception, this);
+    }
+
+    triggerProgress(type, value, max)
+    {
+        if (this.ready)
+            return;
+
+        for(var i = 0; i < this.progressCallbacks.length; i++)
+            this.progressCallbacks[i](type, value, max, this);
+    }
+
+    triggerChunk(value)
+    {
+        if (this.ready)
+            return;
+
+        for(var i = 0; i < this.chunkCallbacks.length; i++)
+            this.chunkCallbacks[i](value, this);
+    }
+
+    constructor(result)
+    {
+
+        if (result instanceof Function)
+        {
+            super(result);
+            this.awaiter = result;
+        }
+        else
+            super(()=>{});
+
+
+        this.callbacks = [];
+        this.errorCallbacks = [];
+        this.progressCallbacks = [];
+        this.chunkCallbacks = [];
+        this.exception = new AsyncException();// null;
+
+        var self = this;
+ 
+        if (result !== undefined && !(result instanceof Function)) {
+            this.result = result;
+            this.ready = true;
+        }
+        else
+        {
+            this.ready = false;
+            this.result = null;
+        }
+    }
+}