refactor(M03): extract WMO render resource cache state

src/render/wmo/wmo_render_resource_cache_state.gd

@@ -0,0 +1,126 @@
+class_name WmoRenderResourceCacheState
+extends RefCounted
+
+## Owns validated lightweight-WMO render resources and their load state.
+## ResourceLoader I/O and cache-format validation remain caller responsibilities.
+
+var _resources_by_normalized_path: Dictionary = {}
+var _missing_normalized_paths: Dictionary = {}
+var _request_cache_paths_by_normalized_path: Dictionary = {}
+
+
+## Returns the validated cached Resource for a normalized WMO path, or null.
+func resource_for(normalized_relative_path: String) -> Resource:
+	if normalized_relative_path.is_empty():
+		return null
+	return _resources_by_normalized_path.get(normalized_relative_path) as Resource
+
+
+## Returns whether a validated Resource is cached for the normalized WMO path.
+func contains_resource(normalized_relative_path: String) -> bool:
+	return (
+		not normalized_relative_path.is_empty()
+		and _resources_by_normalized_path.has(normalized_relative_path)
+	)
+
+
+## Returns whether the normalized WMO path is in the negative cache.
+func is_missing(normalized_relative_path: String) -> bool:
+	return (
+		not normalized_relative_path.is_empty()
+		and _missing_normalized_paths.has(normalized_relative_path)
+	)
+
+
+## Returns whether the normalized WMO path has a pending threaded load request.
+func has_request(normalized_relative_path: String) -> bool:
+	return (
+		not normalized_relative_path.is_empty()
+		and _request_cache_paths_by_normalized_path.has(normalized_relative_path)
+	)
+
+
+## Records one loader-owned threaded request. Cached, missing, duplicate or empty
+## paths are rejected so each normalized WMO path has exactly one state.
+func remember_request(normalized_relative_path: String, cache_path: String) -> bool:
+	if normalized_relative_path.is_empty() or cache_path.is_empty():
+		return false
+	if (
+			_resources_by_normalized_path.has(normalized_relative_path)
+			or _missing_normalized_paths.has(normalized_relative_path)
+			or _request_cache_paths_by_normalized_path.has(normalized_relative_path)
+	):
+		return false
+	_request_cache_paths_by_normalized_path[normalized_relative_path] = cache_path
+	return true
+
+
+## Returns a detached normalized-path to cache-path snapshot for loader-owned
+## ResourceLoader polling or shutdown draining.
+func request_paths_snapshot() -> Dictionary:
+	return _request_cache_paths_by_normalized_path.duplicate()
+
+
+## Completes a pending request with a caller-validated Resource. Returns false
+## for unknown requests or null Resources and otherwise adopts the reference.
+func complete_request_with_resource(
+		normalized_relative_path: String,
+		validated_resource: Resource
+) -> bool:
+	if (
+			normalized_relative_path.is_empty()
+			or validated_resource == null
+			or not _request_cache_paths_by_normalized_path.has(normalized_relative_path)
+	):
+		return false
+	_request_cache_paths_by_normalized_path.erase(normalized_relative_path)
+	_missing_normalized_paths.erase(normalized_relative_path)
+	_resources_by_normalized_path[normalized_relative_path] = validated_resource
+	return true
+
+
+## Completes a pending request as missing after load failure or validation
+## rejection. Returns false for an unknown request.
+func complete_request_as_missing(normalized_relative_path: String) -> bool:
+	if (
+			normalized_relative_path.is_empty()
+			or not _request_cache_paths_by_normalized_path.has(normalized_relative_path)
+	):
+		return false
+	_request_cache_paths_by_normalized_path.erase(normalized_relative_path)
+	_resources_by_normalized_path.erase(normalized_relative_path)
+	_missing_normalized_paths[normalized_relative_path] = true
+	return true
+
+
+## Clears pending requests and negative entries while retaining validated
+## Resources for map reset or orderly shutdown request draining.
+func clear_transient_state() -> void:
+	_request_cache_paths_by_normalized_path.clear()
+	_missing_normalized_paths.clear()
+
+
+## Releases every cached Resource and transient entry. Safe to call repeatedly.
+func clear_all() -> void:
+	_resources_by_normalized_path.clear()
+	clear_transient_state()
+
+
+## Returns the number of pending threaded load requests.
+func pending_request_count() -> int:
+	return _request_cache_paths_by_normalized_path.size()
+
+
+## Returns detached, sorted scalar keys without exposing Resource references.
+func diagnostic_snapshot() -> Dictionary:
+	var resource_paths: Array = _resources_by_normalized_path.keys()
+	var missing_paths: Array = _missing_normalized_paths.keys()
+	var request_paths: Array = _request_cache_paths_by_normalized_path.keys()
+	resource_paths.sort()
+	missing_paths.sort()
+	request_paths.sort()
+	return {
+		"resource_paths": resource_paths.duplicate(),
+		"missing_paths": missing_paths.duplicate(),
+		"request_paths": request_paths.duplicate(),
+	}

src/render/wmo/wmo_render_resource_cache_state.gd.uid

@@ -0,0 +1 @@
+uid://b1g4s1rqrptsw