Decomposition now has mold first, then ants, instead of both. (#65409)

Someone made a suggestion to me that fixed a problem I've been trying to work around, and now that I've made it so people can set custom decompose times, that made this WAY EASIER.

When most foods decay, they will turn into the generic moldy food sprite you've become accustomed to, without the ants. After 30 seconds, that moldy food will get consumed by ants, leaving only the anthill.

Ants also no longer spawn on lavaland's basalt, by Fikou request.

code/game/objects/effects/decals/cleanable.dm

@@ -2,22 +2,32 @@
 	gender = PLURAL
 	layer = ABOVE_NORMAL_TURF_LAYER
 	var/list/random_icon_states = null
-	var/blood_state = "" //I'm sorry but cleanable/blood code is ass, and so is blood_DNA
-	var/bloodiness = 0 //0-100, amount of blood in this decal, used for making footprints and affecting the alpha of bloody footprints
-	var/mergeable_decal = TRUE //when two of these are on a same tile or do we need to merge them into just one?
+	///I'm sorry but cleanable/blood code is ass, and so is blood_DNA
+	var/blood_state = ""
+	///0-100, amount of blood in this decal, used for making footprints and affecting the alpha of bloody footprints
+	var/bloodiness = 0
+	///When two of these are on a same tile or do we need to merge them into just one?
+	var/mergeable_decal = TRUE
 	var/beauty = 0
 	///The type of cleaning required to clean the decal. See __DEFINES/cleaning.dm for the options
 	var/clean_type = CLEAN_TYPE_LIGHT_DECAL
+	///The reagent this decal holds. Leave blank for none.
+	var/datum/reagent/decal_reagent
+	///The amount of reagent this decal holds, if decal_reagent is defined
+	var/reagent_amount = 0
 
 /obj/effect/decal/cleanable/Initialize(mapload, list/datum/disease/diseases)
 	. = ..()
 	if (random_icon_states && (icon_state == initial(icon_state)) && length(random_icon_states) > 0)
 		icon_state = pick(random_icon_states)
 	create_reagents(300)
+	if(decal_reagent)
+		reagents.add_reagent(decal_reagent, reagent_amount)
 	if(loc && isturf(loc))
 		for(var/obj/effect/decal/cleanable/C in loc)
 			if(C != src && C.type == type && !QDELETED(C))
 				if (replace_decal(C))
+					handle_merge_decal(C)
 					return INITIALIZE_HINT_QDEL
 
 	if(LAZYLEN(diseases))
@@ -99,3 +109,9 @@
 		return bloodiness
 	else
 		return 0
+
+/obj/effect/decal/cleanable/proc/handle_merge_decal(obj/effect/decal/cleanable/merger)
+	if(!merger)
+		return
+	if(merger.reagents && reagents)
+		reagents.trans_to(merger, reagents.total_volume)

code/game/objects/effects/decals/cleanable/humans.dm

@@ -106,12 +106,13 @@
 
 	dryname = "rotting gibs"
 	drydesc = "They look bloody and gruesome while some terrible smell fills the air."
+	decal_reagent = /datum/reagent/liquidgibs
+	reagent_amount = 5
 	///Information about the diseases our streaking spawns
 	var/list/streak_diseases
 
 /obj/effect/decal/cleanable/blood/gibs/Initialize(mapload, list/datum/disease/diseases)
 	. = ..()
-	reagents.add_reagent(/datum/reagent/liquidgibs, 5)
 	RegisterSignal(src, COMSIG_MOVABLE_PIPE_EJECTING, .proc/on_pipe_eject)
 
 /obj/effect/decal/cleanable/blood/gibs/replace_decal(obj/effect/decal/cleanable/C)

code/game/objects/effects/decals/cleanable/misc.dm

@@ -12,10 +12,11 @@
 	icon_state = "ash"
 	mergeable_decal = FALSE
 	beauty = -50
+	decal_reagent = /datum/reagent/ash
+	reagent_amount = 30
 
 /obj/effect/decal/cleanable/ash/Initialize(mapload)
 	. = ..()
-	reagents.add_reagent(/datum/reagent/ash, 30)
 	pixel_x = base_pixel_x + rand(-5, 5)
 	pixel_y = base_pixel_y + rand(-5, 5)
 
@@ -27,10 +28,8 @@
 	name = "large pile of ashes"
 	icon_state = "big_ash"
 	beauty = -100
-
-/obj/effect/decal/cleanable/ash/large/Initialize(mapload)
-	. = ..()
-	reagents.add_reagent(/datum/reagent/ash, 30) //double the amount of ash.
+	decal_reagent = /datum/reagent/ash
+	reagent_amount = 60
 
 /obj/effect/decal/cleanable/glass
 	name = "tiny shards"
@@ -91,9 +90,13 @@
 /obj/effect/decal/cleanable/greenglow/ex_act()
 	return FALSE
 
+/obj/effect/decal/cleanable/greenglow/filled
+	decal_reagent = /datum/reagent/uranium
+	reagent_amount = 5
+
 /obj/effect/decal/cleanable/greenglow/filled/Initialize(mapload)
+	decal_reagent = pick(/datum/reagent/uranium, /datum/reagent/uranium/radium)
 	. = ..()
-	reagents.add_reagent(pick(/datum/reagent/uranium, /datum/reagent/uranium/radium), 5)
 
 /obj/effect/decal/cleanable/greenglow/ecto
 	name = "ectoplasmic puddle"
@@ -268,22 +271,23 @@
 	beauty = -150
 	plane = GAME_PLANE
 	layer = LOW_OBJ_LAYER
-	/// The damage the ants will do when you step on them
-	var/ant_bite_damage = 0.1
-	/// The amount of ant reagent inside the ant cluster
-	var/ant_volume
+	decal_reagent = /datum/reagent/ants
+	reagent_amount = 5
 	/// Sound the ants make when biting
 	var/bite_sound = 'sound/weapons/bite.ogg'
 
 /obj/effect/decal/cleanable/ants/Initialize(mapload)
+	reagent_amount = rand(3, 5)
 	. = ..()
-	ant_volume = rand(3, 5)
-	reagents.add_reagent(/datum/reagent/ants, ant_volume)
 	update_ant_damage()
 
-/obj/effect/decal/cleanable/ants/proc/update_ant_damage(spilled_ants)
-	ant_volume += spilled_ants
-	ant_bite_damage = min(10, round((ant_volume * 0.1),0.1)) // 100u ants = 10 max_damage
+/obj/effect/decal/cleanable/ants/handle_merge_decal(obj/effect/decal/cleanable/merger)
+	. = ..()
+	var/obj/effect/decal/cleanable/ants/ants = merger
+	ants.update_ant_damage()
+
+/obj/effect/decal/cleanable/ants/proc/update_ant_damage()
+	var/ant_bite_damage = min(10, round((reagents.get_reagent_amount(/datum/reagent/ants) * 0.1),0.1)) // 100u ants = 10 max_damage
 
 	var/ant_flags = (CALTROP_NOCRAWL | CALTROP_NOSTUN) /// Small amounts of ants won't be able to bite through shoes.
 	if(ant_bite_damage > 1)

code/game/objects/effects/decals/cleanable/robots.dm

@@ -79,10 +79,8 @@
 	bloodiness = BLOOD_AMOUNT_PER_DECAL
 	beauty = -100
 	clean_type = CLEAN_TYPE_BLOOD
-
-/obj/effect/decal/cleanable/oil/Initialize(mapload)
-	. = ..()
-	reagents.add_reagent(/datum/reagent/fuel/oil, 30)
+	decal_reagent = /datum/reagent/fuel/oil
+	reagent_amount = 30
 
 /obj/effect/decal/cleanable/oil/attackby(obj/item/I, mob/living/user)
 	var/attacked_by_hot_thing = I.get_temperature()