Food gets stink lines when about to go rotten (#76038)

## About The Pull Request

Title says it all, food that decomposes gets stink lines halfway
through.

![image](https://github.com/tgstation/tgstation/assets/82850673/ae90220c-4b27-49dd-873a-6f349055f891)

![image](https://github.com/tgstation/tgstation/assets/82850673/c982055d-ed69-4935-bda5-7851836fad2c)

Moldy messes always gets stink lines.

## Why It's Good For The Game

1. It's funny
2. It's a visual indicator for food going bad which is kinda nice

## Changelog

🆑
add: Food now gets stink lines when going bad. Uh oh, stinky.
/🆑

---------

Co-authored-by: san7890 <the@san7890.com>

code/datums/components/food/decomposition.dm

@@ -10,21 +10,27 @@
 	var/handled = TRUE
 	/// Used to stop food in someone's hand & in storage slots from decomposing.
 	var/protected = FALSE
-	/// Used to stop the timer & check for the examine proc
-	var/timerid
 	/// The total time that this takes to decompose
 	var/original_time = DECOMPOSITION_TIME
 	/// Used so the timer won't reset.
 	var/time_remaining = DECOMPOSITION_TIME
+	/// Used to create stink lines when the food is close to going bad
+	var/stink_timerid
+	/// Used to stop decomposition & check for the examine proc
+	var/decomp_timerid
 	/// Used to give raw/gross food lower timers
 	var/decomp_flags
 	/// Use for determining what kind of item the food decomposes into.
 	var/decomp_result
 	/// Does our food attract ants?
 	var/produce_ants = FALSE
+	/// Stink particle type, if we are supposed to create stink particles
+	var/stink_particles
+	/// Stink particle holder
+	var/obj/effect/abstract/particle_holder/particle_effect
 
-/datum/component/decomposition/Initialize(mapload, decomp_req_handle, decomp_flags = NONE, decomp_result, ant_attracting = FALSE, custom_time = 0)
-	if(!isobj(parent))
+/datum/component/decomposition/Initialize(mapload, decomp_req_handle, decomp_flags = NONE, decomp_result, ant_attracting = FALSE, custom_time = 0, stink_particles = /particles/stink)
+	if(!ismovable(parent))
 		return COMPONENT_INCOMPATIBLE
 
 	src.decomp_flags = decomp_flags
@@ -33,17 +39,6 @@
 		handled = FALSE
 	src.produce_ants = ant_attracting
 
-	RegisterSignal(parent, COMSIG_MOVABLE_MOVED, PROC_REF(handle_movement))
-	RegisterSignals(parent, list(
-		COMSIG_ITEM_PICKUP, //person picks up an item
-		COMSIG_ATOM_ENTERED), //Object enters a storage object (boxes, etc.)
-		PROC_REF(picked_up))
-	RegisterSignals(parent, list(
-		COMSIG_ITEM_DROPPED, //Object is dropped anywhere
-		COMSIG_ATOM_EXITED), //Object exits a storage object (boxes, etc)
-		PROC_REF(dropped))
-	RegisterSignal(parent, COMSIG_ATOM_EXAMINE, PROC_REF(examine))
-
 	if(custom_time) // We have a custom decomposition time, set it to that
 		original_time = custom_time
 	else if(decomp_flags & RAW) // Raw food overrides gross
@@ -53,8 +48,28 @@
 
 	time_remaining = original_time
 
+	src.stink_particles = stink_particles
+
 	handle_movement()
 
+/datum/component/decomposition/Destroy()
+	. = ..()
+	if(particle_effect)
+		QDEL_NULL(particle_effect)
+
+/datum/component/decomposition/RegisterWithParent()
+	RegisterSignal(parent, COMSIG_MOVABLE_MOVED, PROC_REF(handle_movement))
+	RegisterSignals(parent, list(
+		COMSIG_ITEM_PICKUP, //person picks up an item
+		COMSIG_ATOM_ENTERED), //Object enters a storage object (boxes, etc.)
+		PROC_REF(picked_up),
+	)
+	RegisterSignals(parent, list(
+		COMSIG_ITEM_DROPPED, //Object is dropped anywhere
+		COMSIG_ATOM_EXITED), //Object exits a storage object (boxes, etc)
+		PROC_REF(dropped),
+	)
+	RegisterSignal(parent, COMSIG_ATOM_EXAMINE, PROC_REF(examine))
 
 /datum/component/decomposition/UnregisterFromParent()
 	UnregisterSignal(parent, list(
@@ -67,8 +82,10 @@
 
 /datum/component/decomposition/proc/handle_movement()
 	SIGNAL_HANDLER
+
 	if(!handled) // If maploaded, has someone touched this previously?
 		return
+
 	var/obj/food = parent // Doesn't HAVE to be food, that's just what it's intended for
 
 	var/turf/open/open_turf = food.loc
@@ -83,7 +100,14 @@
 			return
 
 	// If all other checks fail, then begin decomposition.
-	timerid = addtimer(CALLBACK(src, PROC_REF(decompose)), time_remaining, TIMER_STOPPABLE | TIMER_UNIQUE)
+	decomp_timerid = addtimer(CALLBACK(src, PROC_REF(decompose)), time_remaining, TIMER_STOPPABLE | TIMER_UNIQUE)
+
+	// Also start the stinking timer, if have stink particles and aren't stinking yet
+	if(!stink_particles || particle_effect)
+		return
+
+	var/stink_time = max(0, time_remaining - (original_time * 0.5))
+	stink_timerid = addtimer(CALLBACK(src, PROC_REF(stink_up)), stink_time, TIMER_STOPPABLE | TIMER_UNIQUE)
 
 /datum/component/decomposition/Destroy()
 	remove_timer()
@@ -91,16 +115,20 @@
 
 /// Returns the time remaining in decomp, either from our potential timer or our own value, whichever is more useful
 /datum/component/decomposition/proc/get_time()
-	if(!timerid)
+	if(!decomp_timerid)
 		return time_remaining
-	return timeleft(timerid)
+	return timeleft(decomp_timerid)
 
 /datum/component/decomposition/proc/remove_timer()
-	if(!timerid)
+	if(!decomp_timerid)
 		return
-	time_remaining = timeleft(timerid)
-	deltimer(timerid)
-	timerid = null
+	time_remaining = timeleft(decomp_timerid)
+	deltimer(decomp_timerid)
+	decomp_timerid = null
+	if(!stink_timerid)
+		return
+	deltimer(stink_timerid)
+	stink_timerid = null
 
 /datum/component/decomposition/proc/dropped()
 	SIGNAL_HANDLER
@@ -111,16 +139,24 @@
 	SIGNAL_HANDLER
 	remove_timer()
 	protected = TRUE
-	if(!handled)
-		handled = TRUE
+	handled = TRUE
+
+/datum/component/decomposition/proc/stink_up()
+	stink_timerid = null
+	// Neither should happen, but to be sure
+	if(particle_effect || !stink_particles)
+		return
+	// we don't want stink lines on mobs (even though it'd be quite funny)
+	particle_effect = new(parent, stink_particles, isitem(parent) ? NONE : PARTICLE_ATTACH_MOB)
 
 /datum/component/decomposition/proc/decompose()
+	decomp_timerid = null
 	var/obj/decomp = parent //Lets us spawn things at decomp
 	if(produce_ants)
 		new /obj/effect/decal/cleanable/ants(decomp.loc)
 	if(decomp_result)
 		new decomp_result(decomp.loc)
-	decomp.visible_message("<span class='notice'>[decomp] gets overtaken by mold[produce_ants ? " and ants":""]! Gross!</span>")
+	decomp.visible_message(span_warning("[decomp] gets overtaken by mold[produce_ants ? " and ants":""]! Gross!"))
 	qdel(decomp)
 	return
 

code/game/objects/effects/particles/misc.dm

@@ -30,3 +30,16 @@
 	position = generator(GEN_BOX, list(-240, -240), list(240, 240), NORMAL_RAND)
 	drift = generator(GEN_VECTOR, list(-0.1, 0), list(0.1, 0))
 	rotation = generator(GEN_NUM, 0, 360, NORMAL_RAND)
+
+/particles/stink
+	icon = 'icons/effects/particles/stink.dmi'
+	icon_state = list("stink_1" = 1, "stink_2" = 2, "stink_3" = 2)
+	color = "#0BDA51"
+	width = 100
+	height = 100
+	count = 25
+	spawning = 0.25
+	lifespan = 1 SECONDS
+	fade = 1 SECONDS
+	position = generator(GEN_CIRCLE, 0, 16, UNIFORM_RAND)
+	gravity = list(0, 0.25)

code/game/objects/items/food/_food.dm

@@ -46,6 +46,8 @@
 	var/decomp_req_handle = FALSE
 	///Used to set custom decomposition times for food. Set to 0 to have it automatically set via the food's flags.
 	var/decomposition_time = 0
+	///Used to set decomposition stink particles for food, will have no particles if null
+	var/decomposition_particles = /particles/stink
 
 /obj/item/food/Initialize(mapload)
 	. = ..()
@@ -112,4 +114,4 @@
 ///Set decomp_req_handle to TRUE to only make it decompose when someone picks it up.
 /obj/item/food/proc/make_decompose(mapload)
 	if(!preserved_food)
-		AddComponent(/datum/component/decomposition, mapload, decomp_req_handle, decomp_flags = foodtypes, decomp_result = decomp_type, ant_attracting = ant_attracting, custom_time = decomposition_time)
+		AddComponent(/datum/component/decomposition, mapload, decomp_req_handle, decomp_flags = foodtypes, decomp_result = decomp_type, ant_attracting = ant_attracting, custom_time = decomposition_time, stink_particles = decomposition_particles)

code/game/objects/items/food/misc.dm

@@ -87,10 +87,14 @@
 	foodtypes = GROSS
 	w_class = WEIGHT_CLASS_SMALL
 	preserved_food = TRUE //Can't decompose any more than this
+	/// Variable that holds the reference to the stink lines we get when we're moldy, yucky yuck
+	var/stink_particles
 
 /obj/item/food/badrecipe/Initialize(mapload)
 	. = ..()
 	RegisterSignal(src, COMSIG_ITEM_GRILL_PROCESS, PROC_REF(OnGrill))
+	if(stink_particles)
+		particles = new stink_particles
 
 /obj/item/food/badrecipe/moldy
 	name = "moldy mess"
@@ -100,6 +104,7 @@
 	ant_attracting = TRUE
 	decomp_type = null
 	decomposition_time = 30 SECONDS
+	stink_particles = /particles/stink
 
 /obj/item/food/badrecipe/moldy/bacteria
 	name = "bacteria rich moldy mess"