refactor: JSON → INI config via Godot ConfigFile

.gitignore

@@ -16,7 +16,7 @@ godot_temp_*
 *~
 
 # Config — user overrides, not committed
-config/config.json
+config/config.cfg
 
 # OS
 .DS_Store

autoload/config_manager.gd

@@ -10,10 +10,12 @@ func _ready() -> void:
 	_load_config()
 
 
+## Read a flat setting by key (e.g. "background_color", "show_cpu").
 func get_setting(key: String, default_value: Variant = null) -> Variant:
 	return _settings.get(key, default_value)
 
 
+## Persist a setting and emit the change signal.
 func set_setting(key: String, value: Variant) -> void:
 	if _settings.has(key) and _settings[key] != value:
 		_settings[key] = value
@@ -21,7 +23,7 @@ func set_setting(key: String, value: Variant) -> void:
 		config_changed.emit(key, value)
 
 
-## Parse a "r, g, b" string from config into a Color with alpha 1.0.
+## Parse a "r, g, b" string setting into a Color (alpha = 1.0).
 func get_color(key: String, default_color: Color = Color.WHITE) -> Color:
 	var raw: Variant = _settings.get(key)
 	if raw == null or typeof(raw) != TYPE_STRING:
@@ -35,45 +37,59 @@ func get_color(key: String, default_color: Color = Color.WHITE) -> Color:
 	return Color(r, g, b, 1.0)
 
 
+# --------------------------------------------------------------------------
+# INI loading via Godot's ConfigFile
+# Keys are flattened as "{section}_{key}" for simple lookup.
+# User config.cfg overrides default.cfg on a per-key basis.
+# --------------------------------------------------------------------------
+
 func _load_config() -> void:
-	# Load defaults, then overlay user config.
-	var defaults := _read_json_file("res://config/default.json")
-	var user := _read_json_file("res://config/config.json")
-
 	_settings.clear()
-	if defaults != null and defaults is Dictionary:
-		_merge_dict(_settings, defaults as Dictionary)
-	if user != null and user is Dictionary:
-		_merge_dict(_settings, user as Dictionary)
+	_load_cfg("res://config/default.cfg")
+	_load_cfg("res://config/config.cfg")  # silently ignored if absent
 
 
-static func _read_json_file(path: String) -> Variant:
-	var file := FileAccess.open(path, FileAccess.READ)
-	if file == null:
-		return null
-	var content: String = file.get_as_text()
-	var parsed: Variant = JSON.parse_string(content)
-	return parsed
-
-
-static func _merge_dict(dst: Dictionary, src: Dictionary) -> void:
-	for key in src:
-		dst[key] = src[key]
+func _load_cfg(path: String) -> void:
+	var cfg := ConfigFile.new()
+	if cfg.load(path) != OK:
+		return
+	for section in cfg.get_sections():
+		for key in cfg.get_section_keys(section):
+			_settings[section + "_" + key] = cfg.get_value(section, key)
 
 
 func _save_user_config() -> void:
-	# Only persists settings that differ from defaults.
-	var defaults := _read_json_file("res://config/default.json")
-	if not (defaults is Dictionary):
+	# Load defaults to compare against.
+	var defaults := ConfigFile.new()
+	if defaults.load("res://config/default.cfg") != OK:
 		return
 
-	var diff: Dictionary = {}
-	for key in _settings:
-		if not defaults.has(key) or defaults[key] != _settings[key]:
-			diff[key] = _settings[key]
+	# Collect default keys for reference.
+	var default_keys: Dictionary = {}
+	for section in defaults.get_sections():
+		for key in defaults.get_section_keys(section):
+			default_keys[section + "_" + key] = { "section": section, "key": key }
 
-	var path: String = "res://config/config.json"
-	var json_str: String = JSON.stringify(diff, "\t")
-	var file := FileAccess.open(path, FileAccess.WRITE)
-	if file != null:
-		file.store_string(json_str)
+	var user_cfg := ConfigFile.new()
+	var has_diff: bool = false
+
+	for flat_key in _settings:
+		var entry: Variant = default_keys.get(flat_key)
+		var section: String
+		var cfg_key: String
+		if entry != null:
+			section = entry.section
+			cfg_key = entry.key
+		else:
+			# Not in defaults — derive section from flat key (before first "_").
+			var parts: PackedStringArray = flat_key.split("_", true, 1)
+			section = parts[0] if parts.size() > 1 else "general"
+			cfg_key = parts[-1]
+
+		var default_val: Variant = defaults.get_value(section, cfg_key, null)
+		if _settings[flat_key] != default_val:
+			user_cfg.set_value(section, cfg_key, _settings[flat_key])
+			has_diff = true
+
+	if has_diff:
+		user_cfg.save("res://config/config.cfg")

config/default.cfg

@@ -0,0 +1,14 @@
+[background]
+color=0.08, 0.08, 0.12
+
+[modules]
+show_cpu=true
+show_memory=true
+show_network=true
+show_disk=true
+
+[performance]
+refresh_interval=1.0
+
+[general]
+theme=default

config/default.json

@@ -1,9 +0,0 @@
-{
-  "background_color": "0.08, 0.08, 0.12",
-  "refresh_interval": 1.0,
-  "show_cpu": true,
-  "show_memory": true,
-  "show_network": true,
-  "show_disk": true,
-  "theme": "default"
-}