Add basic date filter

src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/Config.java

@@ -38,6 +38,8 @@ public class Config {
 
     private Integer coherent;
     private boolean forceCoherent;
+    private boolean onlyNewFiles;
+    private Date filterDate;
 
     private Set<String> forcedKeywords = new HashSet<>(Arrays.asList("forced", "signs", "songs"));
     private Set<String> commentaryKeywords = new HashSet<>(Arrays.asList("commentary", "director"));

src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/ConfigLoader.java

@@ -24,6 +24,8 @@ public class ConfigLoader {
             new ThreadValidator(THREADS, false, 2),
             new MkvToolNixPathValidator(MKV_TOOL_NIX, true, Path.of("C:\\Program Files\\MKVToolNix").toFile()),
             new BooleanValidator(SAFE_MODE, false),
+            new BooleanValidator(ONLY_NEW_FILES, false),
+            new DateValidator(FILTER_DATE, false),
             new PatternValidator(INCLUDE_PATTERN, false, Pattern.compile(".*")),
             new SetValidator(FORCED_KEYWORDS, false, true),
             new SetValidator(COMMENTARY_KEYWORDS, false, true),

src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/validator/DateValidator.java

@@ -0,0 +1,22 @@
+package at.pcgamingfreaks.mkvaudiosubtitlechanger.config.validator;
+
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.model.ConfigProperty;
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.util.DateUtils;
+
+import java.util.Date;
+
+public class DateValidator extends ConfigValidator<Date> {
+    public DateValidator(ConfigProperty property, boolean required) {
+        super(property, required, null);
+    }
+
+    @Override
+    Date parse(String value) {
+        return DateUtils.convert(value); // TODO fix null return value
+    }
+
+    @Override
+    boolean isValid(Date result) {
+        return result != null;
+    }
+}