Query/AppConv/App.cs

using System;
using System.Linq;
using AppConv.General;
using AppConv.Units;
using Base;

namespace AppConv{
    public sealed class App : IApp{
        private static readonly IUnitType[] Processors = {
            new Temperature(),
            new Weight(),
            new Length(),
            new Area(),
            new Volume(),
            new Angle(),
            new Storage(),
            new Radix()
        };

        public string[] RecognizedNames => new string[]{
            "conv",
            "convert"
        };
        
        public MatchConfidence GetConfidence(Command cmd){
            return cmd.Text.IndexOf(" to ", StringComparison.InvariantCultureIgnoreCase) != -1 ? MatchConfidence.Possible : MatchConfidence.None;
        }

        public string ProcessCommand(Command cmd){
            string[] data = cmd.Text.Split(new string[]{ " to " }, 2, StringSplitOptions.None);

            string src = data[0].Trim();
            string dst = data[1].Trim();

            if (src.Length == 0 || dst.Length == 0){
                throw new CommandException("Unrecognized conversion app syntax.");
            }

            string result = string.Empty;
            IUnitType used = Processors.FirstOrDefault(processor => processor.TryProcess(src, dst, out result));

            if (used == null){
                throw new CommandException("Could not recognize conversion units.");
            }

            return result;
        }
    }
}