(index) Adding a few experimental relevance signals

code/index/java/nu/marginalia/index/results/IndexResultScoreCalculator.java

@@ -216,6 +216,9 @@ public class IndexResultScoreCalculator {
         int bestCoherenceTitle = coherences.testOptional(positions, spans.title);
         int bestCoherenceHeading = coherences.testOptional(positions, spans.heading);
 
+        boolean allInTitle = coherences.allOptionalInSpan(positions, spans.title);
+        boolean allInHeading = coherences.allOptionalInSpan(positions, spans.heading);
+
         float[] weightedCounts = new float[compiledQuery.size()];
         int firstPosition = Integer.MAX_VALUE;
 
@@ -255,7 +258,9 @@ public class IndexResultScoreCalculator {
                 + bestCoherenceAll
                 + bestCoherenceTitle
                 + bestCoherenceHeading
-                + numCoherenceAll / 4.;
+                + numCoherenceAll / 4.
+                + (allInTitle ? 5.0 : 0)
+                + (allInHeading ? 2.5 : 0);
 
         double tcfAvgDist = rankingParams.tcfAvgDist * (1.0 / calculateAvgMinDistance(positionsQuery, ctx));
         double tcfFirstPosition = rankingParams.tcfFirstPosition * (1.0 / Math.max(1, firstPosition));

code/index/java/nu/marginalia/index/results/model/TermCoherenceGroupList.java

@@ -73,6 +73,16 @@ public class TermCoherenceGroupList {
         return best;
     }
 
+    public boolean allOptionalInSpan(CodedSequence[] positions, DocumentSpan span) {
+        for (var coherenceSet : optionalGroups) {
+            if (!coherenceSet.test(span, positions)) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+
     public static final class TermCoherenceGroup {
         private final int[] offsets;
         private final BitSet present;