SmartDeviceGUIClient/Message.cs

using System;
using System.IO;

namespace SmartDeviceGUIClient
{
        public abstract class Message
        {
                public Message(MessageType type, ushort destination, MessagePriority priority) {
                        this.Type = type;
                        this.Destination = destination;
                        this.Priority = priority;
                }

                public Message(MessageType type, ushort destination) : this(type, destination, MessagePriority.Normal) {}

                public MessageType Type {
                        get { return type; }
                        set { type = value; }
                }
                protected MessageType type;
                
                public ushort Destination {
                        get { return destination; }
                        set { destination = value; }
                }
                private ushort destination;

                public ushort Source {
                        get { return source; }
                        set { source = value; } 
                }
                private ushort source;

                public MessagePriority Priority {
                        get { return priority; }
                        set { priority = value; }
                }
                private MessagePriority priority;

                public abstract MemoryStream SerialiseData(); 

                public abstract void DeserialiseData(Stream serialisedDataStream); 

                public static MemoryStream SerialiseMessage(Message msg) {
                        MemoryStream result = new MemoryStream();
                        result.Write(new byte[] {(byte)msg.Type}, 0, 1);
                        msg.SerialiseData().WriteTo(result);
                        return result;
                }

                public static Message DeserialiseMessage(Stream serialisedMessageStream /*, 'Mapping Table (from messageType to classname) */) {
                        int bBuffer = serialisedMessageStream.ReadByte();
                        if (bBuffer == -1) {
                                // end of stream
                                // TODO: Code for end of stream on deserialise message
                        } else {
                                MessageType msgType= (MessageType)bBuffer;
                                // TODO: Code for creating new message classes from the 'message type', possibly calling Reflection type things
                                // May need a mapping table from type to classname
                        }
                        return null;
                }
        }

        public enum MessageType : byte { 
                Noop,
                Retransmission,
                String,
                HTTPRequest,
                HTTPResponse,
                NoChange,
                CacheIndex,
                CacheUpdateNoChange,
                CacheUpdateHTTPResponse,
                Chunk,
                CacheIndexRequest,
        }

        public enum MessagePriority {
                Low,
                Normal,
                High // unused
        }
}

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