[MIRROR] Countdown effect + couple of components (#12093)

Co-authored-by: Guti <32563288+TheCaramelion@users.noreply.github.com>
Co-authored-by: Cameron Lennox <killer65311@gmail.com>

code/datums/components/effect_remover.dm

@@ -0,0 +1,66 @@
+/datum/component/effect_remover
+	dupe_mode = COMPONENT_DUPE_ALLOWED
+	/// Line sent to the user on successful removal.
+	var/success_feedback
+	/// Line forcesaid by the user on successful removal.
+	var/success_forcesay
+	/// Callback invoked with removal is done.
+	var/datum/callback/on_clear_callback
+	/// A typecache of all effects we can clear with our item.
+	var/list/obj/effect/effects_we_clear
+	/// If above 0, how long it takes while standing still to remove the effect.
+	var/time_to_remove = 0 SECONDS
+
+/datum/component/effect_remover/Initialize(success_forcesay, success_feedback, on_clear_callback, effects_we_clear, time_to_remove)
+	. = ..()
+
+	if(!isitem(parent))
+		return COMPONENT_INCOMPATIBLE
+
+	if(!effects_we_clear)
+		stack_trace("[type] was instantiated without any valid removable effects!")
+		return COMPONENT_INCOMPATIBLE
+
+	//src.success_feedback = success_feedback
+	//src.success_forcesay = success_forcesay
+	src.on_clear_callback = on_clear_callback
+	src.effects_we_clear = typecacheof(effects_we_clear)
+	src.time_to_remove = time_to_remove
+
+/datum/component/effect_remover/Destroy(force)
+	on_clear_callback = null
+	return ..()
+
+/datum/component/effect_remover/RegisterWithParent()
+	RegisterSignal(parent, COMSIG_ITEM_PRE_ATTACK, PROC_REF(try_remove_effect))
+
+/datum/component/effect_remover/UnregisterFromParent()
+	UnregisterSignal(parent, COMSIG_ITEM_PRE_ATTACK)
+
+/datum/component/effect_remover/proc/try_remove_effect(datum/source, atom/target, mob/living/user, params)
+	SIGNAL_HANDLER
+
+	if(!isliving(user))
+		return NONE
+
+	if(is_type_in_typecache(target, effects_we_clear))
+		do_remove_effects(target, user)
+		return
+
+/datum/component/effect_remover/proc/do_remove_effects(obj/effect/target, mob/living/user)
+/* Grah- Might have to get this revised, later on.
+	if(time_to_remove && !do_after(user, time_to_remove, target))
+		return
+	var/obj/item/item_parent = parent
+	if(success_forcesay)
+		user.say(success_forcesay)
+	if(success_feedback)
+		var/real_feedback = replacetext(success_feedback, "%THEEFFECT", "\the [target]")
+		real_feedback = replacetext(real_feedback, "%THEWEAPON", "\the [item_parent]")
+		user.balloon_alert()
+		to_chat(user, span_notice(real_feedback))
+*/
+	on_clear_callback?.Invoke(target, user)
+
+	if(!QDELETED(target))
+		qdel(target)