create RegistrationEvent

common/api/core/src/main/java/com/dfsek/terra/api/config/ConfigPack.java

@@ -29,7 +29,7 @@ import com.dfsek.terra.api.world.chunk.generation.util.provider.GenerationStageP
 
 public interface ConfigPack extends LoaderRegistrar, LoaderHolder, RegistryHolder, StringIdentifiable {
     
-    void registerConfigType(ConfigType<?, ?> type, String id, int priority);
+    ConfigPack registerConfigType(ConfigType<?, ?> type, String id, int priority);
     
     Map<BaseAddon, VersionRange> addons();
     

common/api/core/src/main/java/com/dfsek/terra/api/event/events/config/RegistrationEvent.java

@@ -0,0 +1,40 @@
+package com.dfsek.terra.api.event.events.config;
+
+import com.dfsek.tectonic.loading.TypeLoader;
+import com.dfsek.tectonic.loading.object.ObjectTemplate;
+
+import com.dfsek.terra.api.config.ConfigPack;
+import com.dfsek.terra.api.config.ConfigType;
+import com.dfsek.terra.api.event.events.PackEvent;
+
+import java.lang.reflect.Type;
+import java.util.function.Supplier;
+
+
+public class RegistrationEvent implements PackEvent {
+    private final ConfigPack pack;
+    
+    public RegistrationEvent(ConfigPack pack) {
+        this.pack = pack;
+    }
+    
+    @Override
+    public ConfigPack getPack() {
+        return pack;
+    }
+    
+    public RegistrationEvent registerConfigType(ConfigType<?, ?> type, String id, int priority) {
+        pack.registerConfigType(type, id, priority);
+        return this;
+    }
+    
+    public <T> RegistrationEvent applyLoader(Type type, Supplier<ObjectTemplate<T>> loader) {
+        pack.applyLoader(type, loader);
+        return this;
+    }
+    
+    public <T> RegistrationEvent applyLoader(Type type, TypeLoader<T> loader) {
+        pack.applyLoader(type, loader);
+        return this;
+    }
+}

common/implementation/base/src/main/java/com/dfsek/terra/config/pack/ConfigPackImpl.java

@@ -31,6 +31,7 @@ import com.dfsek.tectonic.loading.TypeRegistry;
 import com.dfsek.tectonic.loading.object.ObjectTemplate;
 import com.dfsek.tectonic.yaml.YamlConfiguration;
 
+import com.dfsek.terra.api.event.events.config.RegistrationEvent;
 import com.dfsek.terra.api.util.generic.Construct;
 
 import org.slf4j.Logger;
@@ -164,6 +165,8 @@ public class ConfigPackImpl implements ConfigPack {
         register(abstractConfigLoader);
         platform.register(abstractConfigLoader);
         
+        platform.getEventManager().callEvent(new RegistrationEvent(this));
+        
         ConfigPackAddonsTemplate addonsTemplate = new ConfigPackAddonsTemplate();
         selfLoader.load(addonsTemplate, packManifest);
         this.addons = addonsTemplate.getAddons();
@@ -263,13 +266,14 @@ public class ConfigPackImpl implements ConfigPack {
     }
     
     @Override
-    public void registerConfigType(ConfigType<?, ?> type, String id, int priority) {
+    public ConfigPack registerConfigType(ConfigType<?, ?> type, String id, int priority) {
         Set<String> contained = new HashSet<>();
         configTypes.forEach((p, configs) -> configs.forEach(pair -> {
             if(contained.contains(pair.getLeft())) throw new IllegalArgumentException("Duplicate config ID: " + id);
             contained.add(id);
         }));
         configTypes.computeIfAbsent(priority, p -> new ArrayList<>()).add(Pair.of(id, type));
+        return this;
     }
     
     @Override