ArcToolkitCLI/ArcToolkitCLI/Commands/Converters/BaseConverter.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using ArcToolkitCLI.Commands.Options;
using ArcToolkitCLI.Util;
using CommandLine;

namespace ArcToolkitCLI.Commands.Converters
{
    public class BaseConverter : IInputOptions, IOutputOptions
    {
        protected Dictionary<string, Func<string, int>> Converters { get; set; }

        protected BaseConverter() { }
        
        public int Run()
        {
            var verb = GetType().GetCustomAttributes(typeof(VerbAttribute), true).Cast<VerbAttribute>().FirstOrDefault();
            
            if(verb == null)
                throw new NotImplementedException("The converter is not properly implemented yet, sorry!");

            var convertCommand = verb.Name;
            
            var files = Glob.EnumerateFiles(Input).ToArray();
            Directory.CreateDirectory(Output);

            if (files.Length == 0)
            {
                Console.WriteLine($"No files specified. Run `convert help {convertCommand}` for help.");
                return 0;
            }

            foreach (var file in files)
            {
                if (Converters.TryGetValue(file.Extension.ToLowerInvariant(), out var converter))
                {
                    var result = 0;
                    if ((result = converter(file.FullName)) != 0)
                        return result;
                }
                else 
                    Console.WriteLine($"File {file.FullName} is none of the supported file formats ({string.Join(", ", Converters.Keys)}). Skipping...");
            }

            return 0;
        }

        [Value(0, HelpText = "Input files to convert")]
        public IEnumerable<string> Input { get; set; }
        public string Output { get; set; }
    }
}