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 +1,93 @@
+using System.Text.RegularExpressions;
+using System.Xml.Linq;
+using FinlyticCore.Dtos.News;
+
+namespace FinlyticNews.Adapters.Discovery;
+
+/// <summary>
+/// Specialized RSS discovery adapter for Finanznachrichten.de, capable of parsing custom fn:isin elements and standard RSS metadata.
+/// </summary>
+public partial class FinanznachrichtenRssDiscoveryAdapter : ArticleDiscoveryAdapter
+{
+    private static readonly XNamespace FnNamespace = "http://www.finanznachrichten.de/service/rss";
+
+    /// <inheritdoc />
+    public override string Name => "finanznachrichten_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
+        {
+            var doc = XDocument.Parse(content);
+            var channel = doc.Root?.Element("channel");
+            var channelTitle = channel?.Element("title")?.Value?.Trim();
+            var channelLanguage = channel?.Element("language")?.Value?.Trim();
+
+            var items = doc.Descendants("item");
+
+            foreach (var item in items)
+            {
+                var link = item.Element("link")?.Value?.Trim() ?? item.Element("guid")?.Value?.Trim();
+                if (string.IsNullOrWhiteSpace(link)) continue;
+
+                // ISIN Extraktion
+                var isins = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+                foreach (var isinEl in item.Elements(FnNamespace + "isin"))
+                {
+                    if (string.IsNullOrWhiteSpace(isinEl.Value)) continue;
+
+                    var parts = isinEl.Value.Split(new[] { ',', ';', ' ' }, StringSplitOptions.RemoveEmptyEntries);
+                    foreach (var part in parts)
+                    {
+                        var trimmed = part.Trim().ToUpperInvariant();
+                        if (IsValidIsin(trimmed))
+                        {
+                            isins.Add(trimmed);
+                        }
+                    }
+                }
+
+                var title = item.Element("title")?.Value?.Trim();
+                var description = item.Element("description")?.Value?.Trim();
+
+                DateTime? pubDate = null;
+                var pubDateValue = item.Element("pubDate")?.Value;
+                if (!string.IsNullOrWhiteSpace(pubDateValue) && DateTime.TryParse(pubDateValue, out var parsedDate))
+                {
+                    pubDate = parsedDate.ToUniversalTime();
+                }
+
+                if (Uri.TryCreate(baseUri, link, out var absoluteUri))
+                {
+                    articles.Add(new DiscoveredArticle(
+                        Url: absoluteUri.ToString(),
+                        Isins: isins.Count > 0 ? isins.ToList() : null,
+                        Title: title,
+                        Summary: description,
+                        PublishedAt: pubDate,
+                        Language: channelLanguage,
+                        SourceName: channelTitle
+                    ));
+                }
+            }
+        }
+        catch
+        {
+            // XML Malformed / Parsing Errors ignorieren
+        }
+
+        // Deduplizierung nach URL
+        return articles.GroupBy(a => a.Url, StringComparer.OrdinalIgnoreCase)
+                       .Select(g => g.First())
+                       .ToList();
+    }
+
+    private static bool IsValidIsin(string input) 
+        => input.Length == 12 && char.IsLetter(input[0]) && char.IsLetter(input[1]);
+}