FCC/Devices/Pumps/HengShan_Pump_NonIC_Plus/MessageTemplateLookup.cs

using Edge.Core.Parser.BinaryParser;
using Edge.Core.Parser.BinaryParser.MessageEntity;
using System;
using System.Collections.Generic;
using System.Linq;

namespace HengShan_Pump_NonIC_Plus
{
    public class MessageTemplateLookup : IMessageTemplateLookup
    {
        /// <summary>
        /// Gets the default singleton instance of type MessageTemplateLookup.
        /// </summary>
        public static MessageTemplateLookup Default { get; } = new MessageTemplateLookup();

        /// <summary>
        /// resolve from the config
        /// </summary>
        private static readonly Dictionary<string, string> messageCodeToTypeStrDic
            = new Dictionary<string, string>();

        static MessageTemplateLookup()
        {
            messageCodeToTypeStrDic.Add("0xA0", "HengShan_Pump_NonIC_Plus.MessageEntity.GetNozzleStatusResponse,HengShan_Pump_NonIC_Plus");
            messageCodeToTypeStrDic.Add("0xA1", "HengShan_Pump_NonIC_Plus.MessageEntity.SetFuelPriceResponse,HengShan_Pump_NonIC_Plus");
            messageCodeToTypeStrDic.Add("0xA5", "HengShan_Pump_NonIC_Plus.MessageEntity.StartResponse,HengShan_Pump_NonIC_Plus");
            messageCodeToTypeStrDic.Add("0xA6", "HengShan_Pump_NonIC_Plus.MessageEntity.StopResponse,HengShan_Pump_NonIC_Plus");
            messageCodeToTypeStrDic.Add("0xA7", "HengShan_Pump_NonIC_Plus.MessageEntity.AuthPumpWithGallonResponse,HengShan_Pump_NonIC_Plus");
            messageCodeToTypeStrDic.Add("0xA9", "HengShan_Pump_NonIC_Plus.MessageEntity.AuthPumpWithAmountResponse,HengShan_Pump_NonIC_Plus");
            messageCodeToTypeStrDic.Add("0xAA", "HengShan_Pump_NonIC_Plus.MessageEntity.CancelRationResponse,HengShan_Pump_NonIC_Plus");
            messageCodeToTypeStrDic.Add("0xAB", "HengShan_Pump_NonIC_Plus.MessageEntity.GetTransactionResponse,HengShan_Pump_NonIC_Plus");
            messageCodeToTypeStrDic.Add("0xAC", "HengShan_Pump_NonIC_Plus.MessageEntity.GetAccumulateResponse,HengShan_Pump_NonIC_Plus");
            messageCodeToTypeStrDic.Add("0xB9", "HengShan_Pump_NonIC_Plus.MessageEntity.SetClockResponse,HengShan_Pump_NonIC_Plus");
            messageCodeToTypeStrDic.Add("0xBA", "HengShan_Pump_NonIC_Plus.MessageEntity.GetVersionResponse,HengShan_Pump_NonIC_Plus");
            messageCodeToTypeStrDic.Add("0xBB", "HengShan_Pump_NonIC_Plus.MessageEntity.GetTransactionFailureResponse,HengShan_Pump_NonIC_Plus");
            messageCodeToTypeStrDic.Add("0xAF", "HengShan_Pump_NonIC_Plus.MessageEntity.ActivePushTransactionResponse,HengShan_Pump_NonIC_Plus");
            messageCodeToTypeStrDic.Add("0xB0", "HengShan_Pump_NonIC_Plus.MessageEntity.ErrorPromptResponse,HengShan_Pump_NonIC_Plus");
        }

        /// <summary>
        /// Create a message entity based on input whole message raw bytes which is: 1 byte Header + 1 byte Nozzle + 1 byte Len 
        ///     + variable length message code + variable length message body
        /// </summary>
        /// <param name="bytes">whole message raw bytes</param>
        /// <returns>new created message entity</returns>
        public MessageTemplateBase GetMessageTemplateByRawBytes(byte[] bytes)
        {
            var key = "0x" + bytes[3].ToString("X2");
            if (messageCodeToTypeStrDic.ContainsKey(key))
            {
                var found = messageCodeToTypeStrDic[key];
                var t = Type.GetType(found);
                var targetInstance = (MessageTemplateBase)Activator.CreateInstance(t);
                return targetInstance;
            }
            else
            {
                throw new ArgumentException("Can't find correlated message entity type for incoming raw message bytes: " + bytes.Select(s => s.ToString("X").PadLeft(2, '0')).Aggregate((n, acc) => n + " " + acc));
            }
        }
    }
}