Advanced Mop can now make its own water (#21903)

* Advanced Mop can now make its own water

The Advanced Mop can now produce its own water at a rate of 1 unit per
process().

The advanced mop now has a switch to toggle wetting itself.

* Tweaks

Uses the proper return ..()
Rearranged the text a little.

code/game/objects/items/weapons/mop.dm

@@ -68,7 +68,7 @@
 	return
 
 /obj/item/weapon/mop/advanced
-	desc = "The most advanced tool in a custodian's arsenal. Just think of all the viscera you will clean up with this!"
+	desc = "The most advanced tool in a custodian's arsenal, complete with a condenser for self-wetting! Just think of all the viscera you will clean up with this!"
 	name = "advanced mop"
 	mopcap = 10
 	icon_state = "advmop"
@@ -78,3 +78,33 @@
 	throwforce = 8
 	throw_range = 4
 	mopspeed = 20
+	var/refill_enabled = TRUE //Self-refill toggle for when a janitor decides to mop with something other than water.
+	var/refill_rate = 1 //Rate per process() tick mop refills itself
+	var/refill_reagent = "water" //Determins what reagent to use for refilling, just in case someone wanted to make a HOLY MOP OF PURGING
+
+/obj/item/weapon/mop/advanced/New()
+	..()
+	START_PROCESSING(SSobj, src)
+
+/obj/item/weapon/mop/advanced/attack_self(mob/user)
+	refill_enabled = !refill_enabled
+	if(refill_enabled)
+		START_PROCESSING(SSobj, src)
+	else
+		STOP_PROCESSING(SSobj,src)
+	user << "<span class='notice'>You set the condenser switch to the '[refill_enabled ? "ON" : "OFF"]' position.</span>"
+	playsound(user, 'sound/machines/click.ogg', 30, 1)
+
+/obj/item/weapon/mop/advanced/process()
+
+	if(reagents.total_volume < mopcap)
+		reagents.add_reagent(refill_reagent, refill_rate)
+
+/obj/item/weapon/mop/advanced/examine(mob/user)
+	..()
+	user << "<span class='notice'>The condenser switch is set to <b>[refill_enabled ? "ON" : "OFF"]</b>.</span>"
+
+/obj/item/weapon/mop/advanced/Destroy()
+	if(refill_enabled)
+		STOP_PROCESSING(SSobj, src)
+	return ..()