Add tray rules and identities editor

MeetingAssistant/Speakers/SpeakerIdentityMerger.cs

@@ -0,0 +1,63 @@
+namespace MeetingAssistant.Speakers;
+
+internal static class SpeakerIdentityMerger
+{
+    public static void MergeInto(
+        SpeakerIdentity target,
+        SpeakerIdentity source,
+        int maxSnippets)
+    {
+        AddAlias(target, source.CanonicalName);
+        foreach (var alias in source.Aliases)
+        {
+            AddAlias(target, alias.Name);
+        }
+
+        foreach (var candidate in source.CandidateNames)
+        {
+            AddAlias(target, candidate.Name);
+        }
+
+        foreach (var reference in source.References)
+        {
+            SpeakerIdentityReferences.AddIfMissing(target, reference);
+        }
+
+        var retainedSnippets = target.Snippets
+            .Concat(source.Snippets)
+            .OrderBy(snippet => StableSnippetKey(snippet.WavBytes))
+            .Take(Math.Max(1, maxSnippets))
+            .Select(snippet => new SpeakerSnippet
+            {
+                WavBytes = snippet.WavBytes,
+                CreatedAt = snippet.CreatedAt
+            })
+            .ToList();
+        target.Snippets.Clear();
+        target.Snippets.AddRange(retainedSnippets);
+        target.UpdatedAt = DateTimeOffset.UtcNow;
+    }
+
+    private static void AddAlias(SpeakerIdentity identity, string? alias)
+    {
+        if (string.IsNullOrWhiteSpace(alias) ||
+            string.Equals(identity.CanonicalName, alias, StringComparison.OrdinalIgnoreCase) ||
+            identity.Aliases.Any(existing => string.Equals(existing.Name, alias, StringComparison.OrdinalIgnoreCase)))
+        {
+            return;
+        }
+
+        identity.Aliases.Add(new SpeakerAlias { Name = alias.Trim() });
+    }
+
+    private static int StableSnippetKey(byte[] snippet)
+    {
+        var hash = new HashCode();
+        foreach (var value in snippet)
+        {
+            hash.Add(value);
+        }
+
+        return hash.ToHashCode();
+    }
+}