Admins can now save custom shells (#61307)

Co-authored-by: Watermelon914 <3052169-Watermelon914@users.noreply.gitlab.com>

code/modules/wiremod/components/admin/save_shell.dm

@@ -0,0 +1,65 @@
+/**
+ * # Save Shell Component
+ *
+ * A component that saves and loads a shell for the integrated circuit.
+ */
+/obj/item/circuit_component/save_shell
+	display_name = "Save Shell"
+	desc = "A component that saves a shell."
+	circuit_flags = CIRCUIT_FLAG_ADMIN
+
+	/// Returns the output from the proccall
+	var/datum/port/output/on_loaded
+
+/obj/item/circuit_component/save_shell/populate_ports()
+	on_loaded = add_output_port("On Loaded", PORT_TYPE_SIGNAL)
+
+/obj/item/circuit_component/save_shell/add_to(obj/item/integrated_circuit/added_to)
+	. = ..()
+	RegisterSignal(added_to, COMSIG_CIRCUIT_POST_LOAD, .proc/on_post_load)
+	RegisterSignal(added_to, COMSIG_CIRCUIT_PRE_SAVE_TO_JSON, .proc/on_pre_save_to_json)
+
+/obj/item/circuit_component/save_shell/removed_from(obj/item/integrated_circuit/removed_from)
+	UnregisterSignal(removed_from, list(COMSIG_CIRCUIT_POST_LOAD, COMSIG_CIRCUIT_PRE_SAVE_TO_JSON))
+	return ..()
+
+/obj/item/circuit_component/save_shell/proc/on_post_load(datum/source)
+	SIGNAL_HANDLER
+	on_loaded.set_output(COMPONENT_SIGNAL)
+
+/obj/item/circuit_component/save_shell/proc/on_pre_save_to_json(datum/source, list/general_data)
+	SIGNAL_HANDLER
+	// We're custom saving the shell, disable any USB cable connections and default shell components.
+	general_data["external_objects"] = list()
+
+/obj/item/circuit_component/save_shell/save_data_to_list(list/component_data)
+	. = ..()
+	var/atom/movable/shell = parent.shell
+	component_data["shell_type"] = shell.type
+	var/list/shell_variables = list()
+	for(var/variable in shell.vars - GLOB.duplicate_forbidden_vars)
+		var/variable_data = shell.vars[variable]
+		if(!istext(variable_data) && !isnum(variable_data))
+			continue
+		if(initial(shell.vars[variable]) == variable_data)
+			continue
+		shell_variables[variable] = variable_data
+
+	component_data["shell_variables"] = shell_variables
+
+/obj/item/circuit_component/save_shell/load_data_from_list(list/component_data)
+	if(parent.shell)
+		return
+
+	var/shell_type = text2path(component_data["shell_type"])
+	if(!shell_type)
+		return ..()
+
+	var/atom/movable/shell = new shell_type(drop_location())
+	var/list/shell_variables = component_data["shell_variables"]
+	for(var/variable in shell_variables - GLOB.duplicate_forbidden_vars)
+		var/variable_data = shell_variables[variable]
+		shell.vv_edit_var(variable, variable_data)
+	var/datum/component/shell/shell_component = shell.AddComponent(/datum/component/shell)
+	shell_component.attach_circuit(parent)
+	return ..()