settings system

src/main/java/carpet/settings/Validator.java

@@ -0,0 +1,63 @@
+package carpet.settings;
+
+import carpet.CarpetServer;
+import carpet.utils.Messenger;
+import net.minecraft.server.command.ServerCommandSource;
+
+import java.util.Locale;
+
+public abstract class Validator<T> {
+    /**
+     * Validate the new value of a rule
+     * @return true if valid, false if new rule invalid.
+     */
+    abstract boolean validate(ServerCommandSource source, ParsedRule<T> currentRule, T newValue, String string);
+
+
+    public static class POSITIVE_NUMBER<T extends Number> extends Validator<T> {
+        @Override
+        public boolean validate(ServerCommandSource source, ParsedRule<T> currentRule, T newValue, String string) {
+            return newValue.doubleValue() > 0;
+        }
+    }
+
+    public static class _COMMAND<T> extends Validator<T> {
+        @Override
+        public boolean validate(ServerCommandSource source, ParsedRule<T> currentRule, T newValue, String string) {
+            if (CarpetServer.settingsManager != null)
+                CarpetServer.settingsManager.notifyPlayersCommandsChanged();
+            return true;
+        }
+    }
+
+    public static class WIP<T> extends Validator<T> {
+        @Override
+        public boolean validate(ServerCommandSource source, ParsedRule<T> currentRule, T newValue, String string) {
+            if (source != null)
+                try
+                {
+                    Messenger.m(source, "r Work in progress - limited or no functionality available for "+currentRule.name);
+                }
+                catch (NullPointerException ignored) { }
+            return true;
+        }
+    }
+    public static class _STRICT<T> extends Validator<T> {
+        @Override
+        public boolean validate(ServerCommandSource source, ParsedRule<T> currentRule, T newValue, String string) {
+            if (!currentRule.options.contains(string.toLowerCase(Locale.ROOT)))
+            {
+                if (source != null)
+                    try
+                    {
+                        Messenger.m(source, "r Valid options: " + currentRule.options.toString());
+                    }
+                    catch (NullPointerException ignored)
+                    {
+                    }
+                return false;
+            }
+            return true;
+        }
+    }
+}