Add command handlers and aggregate methods for inventory/equipment commands #38

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opened 2026-03-14 23:54:57 +00:00 by freemo · 0 comments

freemo commented

2026-03-14 23:54:57 +00:00

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Metadata

Commit Message: feat(event-sourcing): add inventory and equipment command handlers and aggregate methods
Branch: feature/m1-v12-inventory-es-handlers

Background

4 commands (AddItemToInventory, RemoveItemFromInventory, EquipItem, UnequipItem) and events are defined but have no command handlers or aggregate methods. They would crash at runtime.

Expected Behavior

GameObjectCommandHandler handles all 4 inventory/equipment commands. Domain::GameObject has corresponding aggregate methods that apply the events.

Acceptance Criteria

command_handlers.rb registers handlers for all 4 commands
domain.rb GameObject aggregate has add_to_inventory, remove_from_inventory, equip_item, unequip_item methods
Each method validates preconditions and applies the corresponding event
Event application updates aggregate state (@inventory, @equipment)

Subtasks

Add 4 handler registrations in command_handlers.rb
Add 4 aggregate methods in domain.rb GameObject
Add 4 on event handlers in domain.rb for state application
Tests: Unit tests for each handler and aggregate method
Run bundle exec rake unit, fix any errors

Definition of Done

This issue is complete when all subtasks are done, commit created on the specified branch, PR submitted and merged.

## Metadata - **Commit Message**: `feat(event-sourcing): add inventory and equipment command handlers and aggregate methods` - **Branch**: `feature/m1-v12-inventory-es-handlers` ## Background 4 commands (`AddItemToInventory`, `RemoveItemFromInventory`, `EquipItem`, `UnequipItem`) and events are defined but have no command handlers or aggregate methods. They would crash at runtime. ## Expected Behavior `GameObjectCommandHandler` handles all 4 inventory/equipment commands. `Domain::GameObject` has corresponding aggregate methods that apply the events. ## Acceptance Criteria - [ ] `command_handlers.rb` registers handlers for all 4 commands - [ ] `domain.rb` `GameObject` aggregate has `add_to_inventory`, `remove_from_inventory`, `equip_item`, `unequip_item` methods - [ ] Each method validates preconditions and applies the corresponding event - [ ] Event application updates aggregate state (`@inventory`, `@equipment`) ## Subtasks - [ ] Add 4 handler registrations in `command_handlers.rb` - [ ] Add 4 aggregate methods in `domain.rb` `GameObject` - [ ] Add 4 `on` event handlers in `domain.rb` for state application - [ ] Tests: Unit tests for each handler and aggregate method - [ ] Run `bundle exec rake unit`, fix any errors ## Definition of Done This issue is complete when all subtasks are done, commit created on the specified branch, PR submitted and merged.