Copper Age Backport

[1.20.1-0.0.5] - 2025-11-20

Added

• Mod Compatibility System

  • Flexible tag-based system for chest interactions
  • New block tags: golem_target_chests
  • Target chests define where golems can place items to (all compatible chests)
  • Easy mod integration without code changes - just add block IDs to tags

• Barrel Support

  • Copper Golems can now place items into barrels
  • Correct barrel sounds (BARREL_OPEN / BARREL_CLOSE) when interacting
  • Added minecraft:barrel to golem_target_chests tag

• IronChest Mod Integration

  • Full support for all 14 IronChest variants (7 types + trapped variants)
  • Supported chests: iron, gold, diamond, copper, crystal, obsidian, dirt
  • Both regular and trapped versions work with golem item transport

• Documentation

  • CHEST_COMPATIBILITY.md - Complete guide for adding new mod support
  • datapack_example/ - Example datapack for players to add custom chests
  • Instructions for three integration methods: direct block IDs, mod tags, datapacks
  • Examples for popular mods (Storage Drawers, Sophisticated Storage, AE2)

Changed

• AI Sound System

  • Enhanced playChestSound() method with container-type detection
  • Automatic sound selection based on container type:
    • Copper Chests → Custom copper chest sounds
    • Barrels → Barrel-specific sounds
    • Regular Chests → Standard chest sounds
  • Improved blockState caching for better performance

• Code Structure

  • ModTags.java - Added GOLEM_TARGET_CHESTS constants
  • CopperGolemAi.java - Refactored to use tags instead of hardcoded block checks
  • More maintainable and extensible architecture

Fixed

• Critical Server Crash

  • Client-Side Import Fix: Resolved crash when loading mod on dedicated servers
  • Issue: CopperGolemLegacyConfig.java imported client-only classes (Screen, GuiGraphics, Button, etc.)
  • Crash: RuntimeException: Attempted to load class net/minecraft/client/gui/screens/Screen for invalid dist DEDICATED_SERVER
  • Solution: Moved all GUI/Screen code to new ConfigScreenFactory.java with @OnlyIn(Dist.CLIENT) annotation
  • CopperGolemLegacyConfig.java now only contains ForgeConfigSpec (safe for both client and server)
  • Config screen is now properly isolated to client-side only code

• Container Detection Bug

  • Fixed golem only detecting vanilla chests (ChestBlockEntity)
  • Now properly detects all container types including barrels and mod chests
  • Changed search from ChestBlockEntity to BaseContainerBlockEntity
  • Enables support for IronChest, barrels, and other mod containers

• Container Animation Bug

  • Fixed missing open/close animations for barrels and mod chests
  • Barrels now correctly animate using OPEN BlockState property
  • Chests use blockEvent for animation
  • All container types (vanilla, barrels, mod chests) now animate properly

Technical

• Tag-based predicates in TransportItemsBetweenContainers behavior
• Container type detection with proper sound event mapping
• Support for datapack-based chest additions with "replace": false pattern
• Performance-optimized through Minecraft's tag caching system