Word alignment try 2

src/SIL.Machine/Translation/HybridTranslationEngine.cs

@@ -401,6 +401,49 @@ public void TrainSegment(
             InteractiveEngine.TrainSegment(sourceSegment, targetSegment, sentenceStart);
         }
 
+        public TranslationResult GetBestPhraseAlignment(
+            IReadOnlyList<string> sourceSegment,
+            IReadOnlyList<string> targetSegment
+        )
+        {
+            CheckDisposed();
+
+            return InteractiveEngine.GetBestPhraseAlignment(sourceSegment, targetSegment);
+        }
+
+        public TranslationResult GetBestPhraseAlignment(string sourceSegment, string targetSegment)
+        {
+            CheckDisposed();
+
+            return InteractiveEngine.GetBestPhraseAlignment(sourceSegment, targetSegment);
+        }
+
+        async Task<TranslationResult> IWordAlignerEngine.GetBestPhraseAlignmentAsync(
+            string sourceSegment,
+            string targetSegment,
+            CancellationToken cancellationToken
+        )
+        {
+            CheckDisposed();
+
+            return await InteractiveEngine
+                .GetBestPhraseAlignmentAsync(sourceSegment, targetSegment, cancellationToken)
+                .ConfigureAwait(false);
+        }
+
+        public async Task<TranslationResult> GetBestPhraseAlignmentAsync(
+            IReadOnlyList<string> sourceSegment,
+            IReadOnlyList<string> targetSegment,
+            CancellationToken cancellationToken = default
+        )
+        {
+            CheckDisposed();
+
+            return await InteractiveEngine
+                .GetBestPhraseAlignmentAsync(sourceSegment, targetSegment, cancellationToken)
+                .ConfigureAwait(false);
+        }
+
         private TranslationResult Merge(TranslationResult interactiveResult, TranslationResult ruleResult)
         {
             var mergedTargetSegment = new List<string>();

src/SIL.Machine/Translation/IInteractiveTranslationEngine.cs

@@ -4,7 +4,7 @@
 
 namespace SIL.Machine.Translation
 {
-    public interface IInteractiveTranslationEngine : ITranslationEngine
+    public interface IInteractiveTranslationEngine : ITranslationEngine, IWordAlignerEngine
     {
         Task<WordGraph> GetWordGraphAsync(string segment, CancellationToken cancellationToken = default);
 

src/SIL.Machine/Translation/IWordAlignerEngine.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace SIL.Machine.Translation
+{
+    public interface IWordAlignerEngine : IDisposable
+    {
+        Task<TranslationResult> GetBestPhraseAlignmentAsync(
+            string sourceSegment,
+            string targetSegment,
+            CancellationToken cancellationToken = default
+        );
+
+        Task<TranslationResult> GetBestPhraseAlignmentAsync(
+            IReadOnlyList<string> sourceSegment,
+            IReadOnlyList<string> targetSegment,
+            CancellationToken cancellationToken = default
+        );
+
+        TranslationResult GetBestPhraseAlignment(string sourceSegment, string targetSegment);
+
+        TranslationResult GetBestPhraseAlignment(
+            IReadOnlyList<string> sourceSegment,
+            IReadOnlyList<string> targetSegment
+        );
+    }
+}