Rss sketchset

Assets/Scripts/ResourceSystem/ResourceCollectionSketchSet.cs

@@ -53,7 +53,7 @@ private async Task InitAsync()
 
         public bool IsSketchIndexValid(int index)
         {
-            return index < NumSketches;
+            return index < NumSketches && index >= 0;
         }
 
         public void RequestOnlyLoadedMetadata(List<int> requests)

Assets/Scripts/ResourceSystem/RssSketchCollection.cs

@@ -0,0 +1,73 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Net.Http;
+using System.Threading.Tasks;
+using System.Xml;
+using System.ServiceModel.Syndication;
+using UnityEngine;
+
+namespace TiltBrush
+{
+    public class RssSketchCollection : IResourceCollection
+    {
+        private Uri m_Uri;
+        private HttpClient m_HttpClient;
+
+        public RssSketchCollection(HttpClient httpClient, Uri uri)
+        {
+            m_Uri = uri;
+            m_HttpClient = httpClient;
+        }
+
+        public string Name => "RSS Feed";
+        public Uri Uri { get; }
+        public Uri PreviewUri { get; }
+        public string Description { get; }
+        public Author[] Authors { get; }
+        public ResourceLicense License { get; }
+        public async Task InitAsync()
+        {
+            // might as well do all the work when getting the page
+            return;
+        }
+        public async Task<Texture2D> LoadPreviewAsync()
+        {
+            throw new NotImplementedException();
+        }
+        public async Task<Stream> GetStreamAsync()
+        {
+            throw new NotImplementedException();
+        }
+        public async IAsyncEnumerable<IResource> ContentsAsync()
+        {
+            SyndicationFeed feed;
+            try
+            {
+                Debug.Log($"Fetching rss stream {m_Uri.AbsoluteUri}");
+                var stream = await m_HttpClient.GetStreamAsync(m_Uri);
+                Debug.Log("Got stream");
+                using var xmlReader = XmlReader.Create(stream);
+                Debug.Log("Loading feed");
+                feed = SyndicationFeed.Load(xmlReader);
+            }
+            catch (Exception e)
+            {
+                Debug.LogException(e);
+                yield break;
+            }
+            foreach (var item in feed.Items)
+            {
+                var remoteSketch = new RemoteSketchResource(
+                    name: item.Title.Text,
+                    uri: item.Links[0].Uri,
+                    previewUri: null,
+                    description: item.Summary.Text,
+                    authors: item.Authors.Select(x => new TiltBrush.Author { Name = x.Name, Url = x.Uri, Email = x.Email }).ToArray()
+                );
+                yield return remoteSketch;
+            }
+        }
+    }
+}

Assets/Scripts/Save/SketchCatalog.cs

@@ -62,14 +62,16 @@ void Awake()
 
             InitFeaturedSketchesPath();
 
-            var icosaCollection = new IcosaSketchCollection(App.HttpClient);
+            //var icosaCollection = new IcosaSketchCollection(App.HttpClient);
+            var rssCollection = new RssSketchCollection(App.HttpClient, new Uri("https://timaidley.github.io/open-brush-feed/sketches.rss"));
 
             m_Sets = new SketchSet[]
             {
                 new FileSketchSet(),
                 //new FileSketchSet(App.FeaturedSketchesPath()),
                 //new AsyncWrapperSketchSet(new RssSketchSetAsync(new Uri("https://heavenly-upbeat-scorpion.glitch.me/sketches.rss"))),
-                new ResourceCollectionSketchSet(icosaCollection),
+                //new ResourceCollectionSketchSet(icosaCollection),
+                new ResourceCollectionSketchSet(rssCollection),
                 new PolySketchSet(this, SketchSetType.Liked, maxTriangles, needsLogin: true),
                 new GoogleDriveSketchSet(),
             };