Rename component (#59511) (#6199)

Co-authored-by: cacogen <25089914+cacogen@users.noreply.github.com>

code/datums/components/rename.dm

@@ -0,0 +1,65 @@
+/**
+	The rename component.
+
+	This component is used to manage names and descriptions changed with the pen.
+
+	Atoms can only have one instance of this component at a time.
+
+	When a player renames or changes the description of an atom with a pen, this component gets applied to it.
+	If a player resets the name and description, they will be reverted to their state before being changed and the component will be removed.
+ */
+/datum/component/rename
+	dupe_mode = COMPONENT_DUPE_UNIQUE_PASSARGS
+	///The name the player is applying to the parent.
+	var/custom_name
+	///The desc the player is applying to the parent.
+	var/custom_desc
+	///The name before the player changed it.
+	var/original_name
+	///The desc before the player changed it.
+	var/original_desc
+
+/datum/component/rename/Initialize(custom_name, custom_desc)
+	if(!isatom(parent))
+		return COMPONENT_INCOMPATIBLE
+
+	src.custom_name = custom_name
+	src.custom_desc = custom_desc
+	apply_rename()
+
+/**
+	This proc will fire after the parent's name or desc is changed with a pen, which is trying to apply another rename component.
+	Since the parent already has a rename component, it will remove the old one and apply the new one.
+	The name and description changes will be merged or overwritten.
+*/
+/datum/component/rename/InheritComponent(datum/component/rename/new_comp , i_am_original, custom_name, custom_desc)
+	revert_rename()
+	if(new_comp)
+		src.custom_name = new_comp.custom_name
+		src.custom_desc = new_comp.custom_desc
+	else
+		src.custom_name = custom_name
+		src.custom_desc = custom_desc
+	apply_rename()
+
+///Saves the current name and description before changing them to the player's inputs.
+/datum/component/rename/proc/apply_rename()
+	var/atom/owner = parent
+	original_name = owner.name
+	original_desc = owner.desc
+	owner.name = custom_name
+	owner.desc = custom_desc
+
+///Reverts the name and description to the state before they were changed.
+/datum/component/rename/proc/revert_rename()
+	var/atom/owner = parent
+	owner.name = original_name
+	owner.desc = original_desc
+
+/datum/component/rename/proc/remove_component()
+	revert_rename()
+	qdel(src)
+
+/datum/component/rename/Destroy()
+	revert_rename()
+	return ..()