Document valid values for MultipleChoiceSettings in config file

src/main/java/com/replaymod/core/SettingsRegistryBackend.java

@@ -2,6 +2,7 @@ package com.replaymod.core;
 
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
+import com.google.gson.JsonArray;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonPrimitive;
@@ -164,6 +165,15 @@ class SettingsRegistryBackend {
             }
             if (value instanceof String) {
                 category.addProperty(key.getKey(), (String) value);
+                if (key instanceof SettingsRegistry.MultipleChoiceSettingKey) {
+                    @SuppressWarnings("unchecked")
+                    List<String> choices = ((SettingsRegistry.MultipleChoiceSettingKey<String>) key).getChoices();
+                    JsonArray array = new JsonArray();
+                    for (String choice : choices) {
+                        array.add(choice);
+                    }
+                    category.add(key.getKey() + "_valid_values", array);
+                }
             }
         }
         Gson gson = new GsonBuilder().setPrettyPrinting().create();

versions/1.12.2/src/main/java/com/replaymod/core/SettingsRegistryBackend.java

@@ -1,8 +1,10 @@
 package com.replaymod.core;
 
 import net.minecraftforge.common.config.Configuration;
+import net.minecraftforge.common.config.Property;
 
 import java.util.ArrayList;
+import java.util.List;
 import java.util.Map;
 
 class SettingsRegistryBackend {
@@ -36,7 +38,14 @@ class SettingsRegistryBackend {
             } else if (key.getDefault() instanceof Double) {
                 value = configuration.get(key.getCategory(), key.getKey(), (Double) key.getDefault()).getDouble();
             } else if (key.getDefault() instanceof String) {
-                value = configuration.get(key.getCategory(), key.getKey(), (String) key.getDefault()).getString();
+                Property property = configuration.get(key.getCategory(), key.getKey(), (String) key.getDefault());
+                value = property.getString();
+                if (key instanceof SettingsRegistry.MultipleChoiceSettingKey) {
+                    @SuppressWarnings("unchecked")
+                    List<String> choices = ((SettingsRegistry.MultipleChoiceSettingKey<String>) key).getChoices();
+                    property.setValidValues(choices.toArray(new String[0]));
+                    property.setComment("Valid values: " + String.join(", ", choices));
+                }
             } else {
                 throw new IllegalArgumentException("Default type " + key.getDefault().getClass() + " not supported.");
             }

versions/1.12.2/src/main/java/com/replaymod/core/versions/forge/Patterns.java

@@ -7,6 +7,7 @@ import net.minecraft.entity.EntityLivingBase;
 import net.minecraftforge.client.event.GuiScreenEvent;
 import net.minecraftforge.client.event.RenderGameOverlayEvent;
 import net.minecraftforge.client.event.RenderLivingEvent;
+import net.minecraftforge.common.config.Property;
 
 class Patterns {
     @Pattern
@@ -44,4 +45,13 @@ class Patterns {
         //$$ return event.type;
         //#endif
     }
+
+    @Pattern
+    private static void setComment(Property property, String comment) {
+        //#if MC>=10900
+        property.setComment(comment);
+        //#else
+        //$$ property.comment = comment;
+        //#endif
+    }
 }