Make config values not cached so they can update as they are changed (#165)

Author: Swedz

src/main/java/net/swedz/tesseract/neoforge/config/ConfigHandler.java

@@ -11,6 +11,7 @@
 import java.lang.reflect.Method;
 import java.util.Collections;
 import java.util.Map;
+import java.util.function.Supplier;
 
 public final class ConfigHandler implements InvocationHandler
 {
@@ -37,6 +38,31 @@ private String path(String key)
 		return (path.isEmpty() ? "" : (path + ".")) + key;
 	}
 
+	private Supplier<Object> loadValue(Object proxy, Method method, String path)
+	{
+		ModConfigSpec.ConfigValue<?> configValue = spec.getValues().get(path);
+		if(manager.codecs().has(method.getReturnType()))
+		{
+			var codec = manager.codecs().get(method.getReturnType());
+			return () -> codec.parse(TomlOps.INSTANCE, configValue.get()).mapOrElse(
+					(result) -> result,
+					(error) ->
+					{
+						Tesseract.LOGGER.error("Failed to parse input value: {}", error.message());
+						try
+						{
+							return InvocationHandler.invokeDefault(proxy, method);
+						}
+						catch (Throwable ex)
+						{
+							throw new RuntimeException(ex);
+						}
+					}
+			);
+		}
+		return configValue::get;
+	}
+	
 	void loadValues(Class<?> configClass, Object proxy)
 	{
 		Map<String, Object> values = Maps.newHashMap();
@@ -56,27 +82,7 @@ void loadValues(Class<?> configClass, Object proxy)
 				}
 				else
 				{
-					ModConfigSpec.ConfigValue<?> configValue = spec.getValues().get(path);
-					value = configValue.get();
-					if(manager.codecs().has(method.getReturnType()))
-					{
-						var codec = manager.codecs().get(method.getReturnType());
-						value = codec.parse(TomlOps.INSTANCE, value).mapOrElse(
-								(result) -> result,
-								(error) ->
-								{
-									Tesseract.LOGGER.error("Failed to parse input value: {}", error.message());
-									try
-									{
-										return InvocationHandler.invokeDefault(proxy, method);
-									}
-									catch (Throwable ex)
-									{
-										throw new RuntimeException(ex);
-									}
-								}
-						);
-					}
+					value = this.loadValue(proxy, method, path);
 				}
 				values.put(method.getName(), value);
 			}
@@ -89,6 +95,14 @@ void loadValues(Class<?> configClass, Object proxy)
 	public Object invoke(Object proxy, Method method, Object[] args) throws Throwable
 	{
 		var value = values.get(method.getName());
-		return value instanceof ConfigInstance<?> config ? config.config() : value;
+		if(value instanceof ConfigInstance<?> config)
+		{
+			return config.config();
+		}
+		else if(value instanceof Supplier<?> supplier)
+		{
+			return supplier.get();
+		}
+		return value;
 	}
 }