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Smart Way to Handle Voice Commands in Code to Action a Command

由 谁说我不能喝 提交于 2019-12-01 11:19:48

You are looking for the Strategy pattern as defined here.

This will allow you to handle multiple if statements very easily.

A factory pattern might also suit you. A factory could use reflection to determine which command to create.

You could also just dump all your commands into a dictionary.

EDIT:

Given the last bit of code example a factory is what you need. I've put one together below.

The factory simply reflects on all the methods in MySpeechMethods, looks for ones with SpeechAttributes and sends back the MethodInfo to invoke. If you need return values from your methods you can either set all the methods to return the same type (like string) or look into generics, but I'll leave that to you. :)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using MyApp.SpeechMethods;

namespace MyApp
{
    class Program
    {
        static void Main(string[] args)
        {
            var methods = new MySpeechMethods();
            MethodInfo myMethod;
            myMethod = SpeechFactory.GetSpeechMethod("Time Please");
            myMethod.Invoke(methods, null);
            myMethod = SpeechFactory.GetSpeechMethod("Volume Down");
            myMethod.Invoke(methods, null);
            myMethod = SpeechFactory.GetSpeechMethod("Volume Up");
            myMethod.Invoke(methods, null);
        }
    }

    public static class SpeechFactory
    {
        private static Dictionary<string, MethodInfo> speechMethods = new Dictionary<string, MethodInfo>();
        public static MethodInfo GetSpeechMethod(string speechText)
        {
            MethodInfo methodInfo;
            var mySpeechMethods = new MySpeechMethods();
            if (speechMethods.Count == 0)
            {
                var methodNames =
                    typeof (MySpeechMethods).GetMethods(BindingFlags.Public | BindingFlags.DeclaredOnly | BindingFlags.Instance);
                var speechAttributeMethods = methodNames.Where(y => y.GetCustomAttributes().OfType<SpeechAttribute>().Any());
                foreach (var speechAttributeMethod in speechAttributeMethods)
                {
                    foreach (var attribute in speechAttributeMethod.GetCustomAttributes(true))
                    {
                        speechMethods.Add(((SpeechAttribute)attribute).SpeechValue, speechAttributeMethod);
                    }
                }
                methodInfo = speechMethods[speechText];
            }
            else
            {
                methodInfo = speechMethods[speechText];
            }

            return methodInfo;
        }
    }
}

namespace MyApp.SpeechMethods
{
    public class MySpeechMethods
    {
        [Speech("Time Please")]
        [Speech("Whats the Time")]
        [Speech("What Time is it")]
        public void GetTime()
        {
            Console.WriteLine(DateTime.Now.ToLocalTime());
        }

        [Speech("Volume Down")]
        public void VolumeDown()
        {
            Console.WriteLine("Volume Down 1");
        }

        [Speech("Volume Up")]
        public void VolumeUp()
        {
            Console.WriteLine("Volume Up 1");
        }
    }

    [System.AttributeUsage(System.AttributeTargets.Method, AllowMultiple = true)]
    public class SpeechAttribute : System.Attribute
    {
        public string SpeechValue { get; set; }

        public SpeechAttribute(string textValue)
        {
            this.SpeechValue = textValue;
        }
    }
}
标签
c#
command
controls
speech
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