feat(News): refactor news service and add sentiment tracking

2026-08-09 21:01:41 +02:00
parent 605e41cfeb
commit aff831cf58
390 changed files with 115094 additions and 9 deletions
@@ -0,0 +1,73 @@
+using System.ServiceModel.Syndication;
+using System.Xml;
+using FinlyticCore.Dtos.News;
+
+namespace FinlyticNews.Adapters.Discovery;
+
+/// <summary>
+/// Discovery adapter targeting standard RSS/Atom syndication feeds.
+/// </summary>
+public class RssDiscoveryAdapter : ArticleDiscoveryAdapter
+{
+    /// <inheritdoc />
+    public override string Name => "rss";
+
+    /// <inheritdoc />
+    public override List<DiscoveredArticle> ExtractUrls(string content, string sourceUrl)
+    {
+        if (string.IsNullOrWhiteSpace(content)) return [];
+
+        var articles = new List<DiscoveredArticle>();
+        if (!Uri.TryCreate(sourceUrl, UriKind.Absolute, out var baseUri)) return articles;
+
+        try
+        {
+            using var stringReader = new StringReader(content);
+            using var xmlReader = XmlReader.Create(stringReader, new XmlReaderSettings 
+            { 
+                DtdProcessing = DtdProcessing.Ignore,
+                IgnoreWhitespace = true 
+            });
+
+            var feed = SyndicationFeed.Load(xmlReader);
+            var feedLanguage = feed?.Language;
+            var feedTitle = feed?.Title?.Text;
+
+            if (feed?.Items != null)
+            {
+                foreach (var item in feed.Items)
+                {
+                    var link = item.Links.FirstOrDefault()?.Uri?.ToString() ?? item.Id;
+
+                    if (!string.IsNullOrWhiteSpace(link) && Uri.TryCreate(baseUri, link, out var absoluteUri))
+                    {
+                        var title = item.Title?.Text?.Trim();
+                        var summary = item.Summary?.Text?.Trim();
+                        
+                        DateTime? pubDate = item.PublishDate != DateTimeOffset.MinValue 
+                            ? item.PublishDate.UtcDateTime 
+                            : (item.LastUpdatedTime != DateTimeOffset.MinValue ? item.LastUpdatedTime.UtcDateTime : null);
+
+                        articles.Add(new DiscoveredArticle(
+                            Url: absoluteUri.ToString(),
+                            Isins: null,
+                            Title: title,
+                            Summary: summary,
+                            PublishedAt: pubDate,
+                            Language: feedLanguage,
+                            SourceName: feedTitle
+                        ));
+                    }
+                }
+            }
+        }
+        catch
+        {
+            // Graceful handling fehlerhafter Feeds
+        }
+
+        return articles.GroupBy(u => u.Url, StringComparer.OrdinalIgnoreCase)
+                       .Select(g => g.First())
+                       .ToList();
+    }
+}