More changes to add Torrents automatically; Modified cache to 8 days; Modified season finale lookups for edge case

2026-10-24 14:37:51 -04:00
parent 32aca8b197
commit dcadf31192
5 changed files with 164 additions and 4 deletions
@@ -0,0 +1,63 @@
+using System.Xml.Linq;
+
+namespace AnimeAnnouncer.Torrents
+{
+    public record NyaaRssItem(
+        String Title,
+        String Published,
+        String Category,
+        String CategoryID,
+        String Size,
+        String Link,
+        String Description,
+        String PostID);
+
+    /// <summary>
+    /// Reads Nyaa RSS feeds and downloads the .torrent files they link to.
+    /// </summary>
+    public class NyaaRssReader
+    {
+        private readonly HttpClient httpClient;
+
+        public NyaaRssReader(HttpClient? httpClient = null)
+        {
+            this.httpClient = httpClient ?? new HttpClient();
+        }
+
+        /// <summary>
+        /// Converts a Nyaa search URL into its RSS equivalent, if it isn't one already.
+        /// </summary>
+        public static String ToRssUrl(String url)
+        {
+            return url.Contains("rss") ? url : url + "&page=rss";
+        }
+
+        public async Task<List<NyaaRssItem>> ReadAsync(String url)
+        {
+            var response = await httpClient.GetStringAsync(ToRssUrl(url));
+            return Parse(response);
+        }
+
+        public static List<NyaaRssItem> Parse(String rssXml)
+        {
+            XDocument doc = XDocument.Parse(rssXml);
+            XNamespace nyaaNS = doc.Root!.GetNamespaceOfPrefix("nyaa") ?? XNamespace.None;
+            return (from item in doc.Descendants("channel").Elements("item")
+                    select new NyaaRssItem(
+                        Title: item.Element("title")?.Value ?? String.Empty,
+                        Published: item.Element("pubDate")?.Value ?? String.Empty,
+                        Category: item.Element(nyaaNS + "category")?.Value ?? String.Empty,
+                        CategoryID: item.Element(nyaaNS + "categoryId")?.Value ?? String.Empty,
+                        Size: item.Element(nyaaNS + "size")?.Value ?? String.Empty,
+                        Link: item.Element("link")?.Value ?? String.Empty,
+                        Description: item.Element("description")?.Value ?? String.Empty,
+                        PostID: item.Element("guid")?.Value ?? String.Empty
+                    )).ToList();
+        }
+
+        public Task<byte[]> DownloadTorrentAsync(NyaaRssItem item)
+        {
+            return httpClient.GetByteArrayAsync(item.Link);
+        }
+    }
+}