chore: Refactor and fix some bugs with content display

src/main/java/com/onarandombox/MultiverseCore/commandtools/MVCommandContexts.java

@@ -40,7 +40,7 @@ public class MVCommandContexts extends PaperCommandContexts {
 
     private ContentFilter parseContentFilter(BukkitCommandExecutionContext context) {
         if (Strings.isNullOrEmpty(context.getFirstArg())) {
-            return DefaultContentFilter.getInstance();
+            return DefaultContentFilter.get();
         }
         String filterString = context.popFirstArg();
         return RegexContentFilter.fromString(filterString);

src/main/java/com/onarandombox/MultiverseCore/display/filters/ContentFilter.java

@@ -18,4 +18,11 @@ public interface ContentFilter {
      * @return True if content should be filtered, false otherwise.
      */
     boolean needToFilter();
+
+    /**
+     * Gets the string representation of this filter.
+     *
+     * @return The string representation of this filter.
+     */
+    String toString();
 }

src/main/java/com/onarandombox/MultiverseCore/display/filters/DefaultContentFilter.java

@@ -7,7 +7,7 @@ public class DefaultContentFilter implements ContentFilter {
 
     public static DefaultContentFilter instance;
 
-    public static DefaultContentFilter getInstance() {
+    public static DefaultContentFilter get() {
         if (instance == null) {
             instance = new DefaultContentFilter();
         }

src/main/java/com/onarandombox/MultiverseCore/display/filters/RegexContentFilter.java

@@ -68,11 +68,11 @@ public class RegexContentFilter implements ContentFilter {
         if (!hasValidRegex()) {
             return false;
         }
-        String text = ChatColor.stripColor(String.valueOf(value));
+        String text = ChatColor.stripColor(String.valueOf(value)).toLowerCase();
         try {
             return regexPattern.matcher(text).find();
         } catch (PatternSyntaxException ignored) {
-            Logging.fine("Error parsing regex '%s' for input '%s'", regexString, text);
+            Logging.warning("Error parsing regex '%s' for input '%s'", regexString, text);
             return false;
         }
     }

src/main/java/com/onarandombox/MultiverseCore/display/handlers/BaseSendHandler.java

@@ -19,7 +19,7 @@ import org.jetbrains.annotations.Nullable;
 public abstract class BaseSendHandler<T extends BaseSendHandler<?>> implements SendHandler {
 
     protected String header = "";
-    protected ContentFilter filter = DefaultContentFilter.getInstance();
+    protected ContentFilter filter = DefaultContentFilter.get();
     protected String noContentMessage = String.format("%sThere is no content to display.", ChatColor.RED);
 
     /**

src/main/java/com/onarandombox/MultiverseCore/display/handlers/PagedSendHandler.java

@@ -35,7 +35,7 @@ public class PagedSendHandler extends BaseSendHandler<PagedSendHandler> {
      */
     @Override
     public void sendContent(@NotNull BukkitCommandIssuer issuer, @NotNull List<String> content) {
-        if (!paginate || (issuer instanceof ConsoleCommandSender && !paginateInConsole)) {
+        if (!paginate || (issuer.getIssuer() instanceof ConsoleCommandSender && !paginateInConsole)) {
             sendNormal(issuer, content);
             return;
         }

src/main/java/com/onarandombox/MultiverseCore/display/parsers/ListContentProvider.java

@@ -27,7 +27,7 @@ public class ListContentProvider<T> implements ContentProvider {
 
     private final List<T> list;
 
-    private String format = "%s";
+    private String format = null;
 
     public ListContentProvider(List<T> list) {
         this.list = list;
@@ -38,6 +38,9 @@ public class ListContentProvider<T> implements ContentProvider {
      */
     @Override
     public Collection<String> parse(@NotNull BukkitCommandIssuer issuer) {
+        if (format == null) {
+            return list.stream().map(Object::toString).collect(Collectors.toList());
+        }
         return list.stream().map(element -> String.format(format, element)).collect(Collectors.toList());
     }