Improve subtitle selection

src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/impl/SubtitleTrackComparator.java

@@ -0,0 +1,34 @@
+package at.pcgamingfreaks.mkvaudiosubtitlechanger.impl;
+
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.model.FileAttribute;
+import lombok.RequiredArgsConstructor;
+import org.apache.commons.lang3.StringUtils;
+
+import java.util.Comparator;
+
+@RequiredArgsConstructor
+public class SubtitleTrackComparator implements Comparator<FileAttribute> {
+    private final String[] preferredSubtitles;
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public int compare(FileAttribute track1, FileAttribute track2) {
+        int result = 0;
+
+        if (StringUtils.containsAnyIgnoreCase(track1.getTrackName(), preferredSubtitles)) {
+            result++;
+        }
+        if (StringUtils.containsAnyIgnoreCase(track2.getTrackName(), preferredSubtitles)) {
+            result--;
+        }
+
+        if (result == 0) {
+            if (track1.isDefaultTrack()) result++;
+            if (track2.isDefaultTrack()) result--;
+        }
+
+        return result;
+    }
+}