feat: the rebuild gamemode of "Gauntlet"

scripts/event_bus.gd

@@ -0,0 +1,73 @@
+extends Node
+
+# EventBus - Centralized Observer Pattern for inter-manager communication
+# Replaces direct cross-references between managers
+
+# =============================================================================
+# Events Registry
+# =============================================================================
+
+# Player Events
+const EVENT_PLAYER_JOINED = "player_joined"
+const EVENT_PLAYER_LEFT = "player_left"
+const EVENT_PLAYER_READY = "player_ready"
+
+# Match Events
+const EVENT_MATCH_STARTED = "match_started"
+const EVENT_MATCH_ENDED = "match_ended"
+const EVENT_GAME_MODE_CHANGED = "game_mode_changed"
+
+# Economy Events
+const EVENT_CURRENCY_CHANGED = "currency_changed"
+const EVENT_ITEM_PURCHASED = "item_purchased"
+const EVENT_GACHA_PULL = "gacha_pull"
+
+# Profile Events
+const EVENT_PROFILE_LOADED = "profile_loaded"
+const EVENT_PROFILE_UPDATED = "profile_updated"
+const EVENT_AVATAR_CHANGED = "avatar_changed"
+
+# Session Events
+const EVENT_SESSION_REFRESHED = "session_refreshed"
+const EVENT_SESSION_EXPIRED = "session_expired"
+
+# =============================================================================
+# Signal Bus
+# =============================================================================
+
+signal event_emitted(event_name: String, data: Variant)
+
+# =============================================================================
+# Internal Registry
+# =============================================================================
+
+var _listeners: Dictionary = {} # event_name -> Array[Callable]
+
+# =============================================================================
+# Public API
+# =============================================================================
+
+func emit(event_name: String, data: Variant = null) -> void:
+	"""Emit an event to all registered listeners."""
+	if _listeners.has(event_name):
+		for callback in _listeners[event_name]:
+			if data != null:
+				callback.call(data)
+			else:
+				callback.call()
+	event_emitted.emit(event_name, data)
+
+func on(event_name: String, callback: Callable) -> void:
+	"""Subscribe to an event."""
+	if not _listeners.has(event_name):
+		_listeners[event_name] = []
+	_listeners[event_name].append(callback)
+
+func off(event_name: String, callback: Callable) -> void:
+	"""Unsubscribe from an event."""
+	if _listeners.has(event_name):
+		_listeners[event_name].erase(callback)
+
+func clear() -> void:
+	"""Remove all listeners. Useful for cleanup between scenes."""
+	_listeners.clear()