using System;
using System.IO;
using System.ComponentModel;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
 
namespace FolderContents
{
    public class FolderContents : INotifyPropertyChanged
    {
        private string fldrPath = "";
        private string fldrPath2 = "";
 
        private string[] fldrFiles;
 
        private string allowedExtensions = "";
 
        public event PropertyChangedEventHandler PropertyChanged;
 
        private void NotifyPropertyChanged(String info)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(info));
            }
        }
 
        public string FolderPath
        {
            get
            {
                return this.fldrPath;
            }
            set
            {
                this.fldrPath = value;
                NotifyPropertyChanged("FolderPath");
                RefreshFolderFiles();
            }
        }
 
        public string FolderPath2
        {
            get
            {
                return this.fldrPath2;
            }
            set
            {
                this.fldrPath2 = value;
                NotifyPropertyChanged("FolderPath2");
                RefreshFolderFiles();
            }
        }
 
        public string AllowedExtensions
        {
            get
            {
                return this.allowedExtensions;
            }
            set
            {
                this.allowedExtensions = value;
                NotifyPropertyChanged("AllowedExtensions");
                RefreshFolderFiles();
            }
        }
 
        public string[] FolderFiles
        {
            get
            {
                return this.fldrFiles;
            }
            set
            {
            }
        }
 
        public void RefreshFolderFiles()
        {
            List<string> files = new List<string>();
 
            if (Directory.Exists(this.fldrPath))
            {
                if (this.allowedExtensions == "")
                {
                    files.AddRange(Directory.GetFiles(this.fldrPath));
                } else
                {
                    string[] filters = this.allowedExtensions.Split(new Char[] { ';' });
 
                   
 
                    foreach (string filter in filters)
                    {
                        files.AddRange(Directory.GetFiles(this.fldrPath, filter));
                    }
                }
            }
 
            if (Directory.Exists(this.fldrPath2))
            {
                if (this.allowedExtensions == "")
                {
                    files.AddRange(Directory.GetFiles(this.fldrPath2));
                }
                else
                {
                    string[] filters = this.allowedExtensions.Split(new Char[] { ';' });
 
 
 
                    foreach (string filter in filters)
                    {
                        files.AddRange(Directory.GetFiles(this.fldrPath2, filter));
                    }
                }
            }
 
            List<string> orderedfiles = new List<string>();
            orderedfiles.AddRange(files.OrderByDescending(d => new FileInfo(d).CreationTime));
 
            this.fldrFiles = orderedfiles.ToArray();
            NotifyPropertyChanged("FolderFiles");
        }
    }
}