1.0-dev17 (Subscription page created)

VDownload.Core/Services/Subscription.cs

@@ -0,0 +1,67 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using VDownload.Core.Interfaces;
+
+namespace VDownload.Core.Services
+{
+    [Serializable]
+    public class Subscription
+    {
+        #region CONSTRUCTORS
+
+        public Subscription(IPlaylist playlist)
+        {
+            Playlist = playlist;
+            SavedVideos = Playlist.Videos;
+        }
+
+        #endregion
+
+
+
+        #region PROPERTIES
+
+        public IPlaylist Playlist { get; private set; }
+        public IVideo[] SavedVideos { get; private set; }
+
+        #endregion
+
+
+
+        #region PUBLIC METHODS
+
+        public async Task<IVideo[]> GetNewVideosAsync()
+        {
+            await Playlist.GetVideosAsync();
+            return GetUnsavedVideos();
+        }
+
+        public async Task<IVideo[]> GetNewVideosAndUpdateAsync()
+        {
+            await Playlist.GetVideosAsync();
+            IVideo[] newVideos = GetUnsavedVideos();
+            SavedVideos = Playlist.Videos;
+            return newVideos;
+        }
+
+        #endregion
+
+
+
+        #region PRIVATE METHODS
+
+        private IVideo[] GetUnsavedVideos()
+        {
+            List<IVideo> newVideos = Playlist.Videos.ToList();
+            foreach (IVideo savedVideo in SavedVideos)
+            {
+                newVideos.RemoveAll((v) => v.Source == savedVideo.Source && v.ID == savedVideo.ID);
+            }
+            return newVideos.ToArray();
+        }
+
+        #endregion
+    }
+}