eating refactor (#3733) + bugfixes

Ok, messed up resolving the merge conflicts (first try), so doing a
fresh pr. This turned out to be a good thing, as after I put the changes
back I tested again, and found 2 bugs (not due to my code)

Firstly, the organ refactor had introduced a bug when taking liver
damage from being drunk. It wasn't getting the liver correctly, leaving
it with null, and was then trying to damage it.

The second was related to the amount you took in when drinking

code/modules/mob/living/carbon/carbon.dm

@@ -737,4 +737,80 @@ var/list/ventcrawl_machinery = list(/obj/machinery/atmospherics/unary/vent_pump,
 	return 1
 
 /mob/living/carbon/proc/can_eat(flags = 255)
-	return 1
+	return 1
+
+/mob/living/carbon/proc/eat(var/obj/item/weapon/reagent_containers/food/toEat, mob/user)
+	if(!istype(toEat))
+		return 0
+	var/fullness = 0
+	if(istype(toEat, /obj/item/weapon/reagent_containers/food/snacks))
+		fullness = nutrition + (reagents.get_reagent_amount("nutriment") * 20) + (reagents.get_reagent_amount("protein") * 25) + (reagents.get_reagent_amount("plantmatter") * 25)
+	if(user == src)
+		if(istype(toEat, /obj/item/weapon/reagent_containers/food/drinks))
+			if(!selfDrink(toEat))
+				return 0
+		else
+			if(!selfFeed(toEat, fullness))
+				return 0
+	else
+		if(!forceFed(toEat, user, fullness))
+			return 0
+	consume(toEat)
+	return 1
+
+/mob/living/carbon/proc/selfFeed(var/obj/item/weapon/reagent_containers/food/toEat, fullness)
+	if(istype(toEat, /obj/item/weapon/reagent_containers/food/pill))
+		src << "<span class='notify'>You [toEat.apply_method] [toEat].</span>"
+	else
+		if (fullness <= 50)
+			src << "<span class='warning'>You hungrily chew out a piece of [toEat] and gobble it!</span>"
+		else if (fullness > 50 && fullness <= 150)
+			src << "<span class='notice'>You hungrily begin to eat [toEat].</span>"
+		else if (fullness > 150 && fullness <= 350)
+			src << "<span class='notice'>You take a bite of [toEat].</span>"
+		else if (fullness > 350 && fullness <= 550)
+			src << "<span class='notice'>You unwillingly chew a bit of [toEat].</span>"
+		else if (fullness > (550 * (1 + overeatduration / 2000)))	// The more you eat - the more you can eat
+			src << "<span class='warning'>You cannot force any more of [toEat] to go down your throat.</span>"
+			return 0
+	return 1
+
+/mob/living/carbon/proc/selfDrink(var/obj/item/weapon/reagent_containers/food/drinks/toDrink, mob/user)
+	return 1
+
+/mob/living/carbon/proc/forceFed(var/obj/item/weapon/reagent_containers/food/toEat, mob/user, fullness)
+	if (fullness <= (550 * (1 + overeatduration / 1000)))
+		visible_message("<span class='warning'>[user] attempts to force [src] to [toEat.apply_method] [toEat].</span>")
+	else
+		visible_message("<span class='warning'>[user] cannot force anymore of [toEat] down [src]'s throat.</span>")
+		return 0
+	if(!do_mob(user, src))
+		return 0
+	forceFedAttackLog(toEat, user)
+	visible_message("<span class='warning'>[user] forces [src] to [toEat.apply_method] [toEat].</span>")
+	return 1
+
+/mob/living/carbon/proc/forceFedAttackLog(var/obj/item/weapon/reagent_containers/food/toEat, mob/user)
+	attack_log += text("\[[time_stamp()]\] <font color='orange'>Has been fed [toEat.name] by [user.name] ([user.ckey]) Reagents: [toEat.reagentlist(toEat)]</font>")
+	user.attack_log += text("\[[time_stamp()]\] <font color='red'>Fed [toEat.name] to [name] ([ckey]) Reagents: [toEat.reagentlist(toEat)]</font>")
+	log_attack("[user.name] ([user.ckey]) fed [name] ([ckey]) with [toEat.name] Reagents: [toEat.reagentlist(toEat)] (INTENT: [uppertext(user.a_intent)])")
+	if(!iscarbon(user))
+		LAssailant = null
+	else
+		LAssailant = user
+
+
+/*TO DO - If/when stomach organs are introduced, override this at the human level sending the item to the stomach
+so that different stomachs can handle things in different ways VB*/
+/mob/living/carbon/proc/consume(var/obj/item/weapon/reagent_containers/food/toEat)
+	if(!toEat.reagents)
+		return
+	if(toEat.consume_sound)
+		playsound(loc, toEat.consume_sound, rand(10,50), 1)
+	if(toEat.reagents.total_volume)
+		toEat.reagents.reaction(src, toEat.apply_type)
+		spawn(0)
+			if(toEat.reagents.total_volume > toEat.bitesize)
+				toEat.reagents.trans_to(src, toEat.bitesize*toEat.transfer_efficiency)
+			else
+				toEat.reagents.trans_to(src, toEat.reagents.total_volume*toEat.transfer_efficiency)

code/modules/mob/living/carbon/human/human.dm

@@ -1882,3 +1882,27 @@
 
 /mob/living/carbon/human/can_eat(flags = 255)
 	return species && (species.dietflags & flags)
+
+/mob/living/carbon/human/selfFeed(var/obj/item/weapon/reagent_containers/food/toEat, fullness)
+	if(!check_has_mouth())
+		src << "Where do you intend to put \the [toEat]? You don't have a mouth!"
+		return 0
+	return ..()
+
+/mob/living/carbon/human/forceFed(var/obj/item/weapon/reagent_containers/food/toEat, mob/user, fullness)
+	if(!check_has_mouth())
+		if(!((istype(toEat, /obj/item/weapon/reagent_containers/food/drinks) && (get_species() == "Machine"))))
+			user << "Where do you intend to put \the [toEat]? \The [src] doesn't have a mouth!"
+			return 0
+	return ..()
+
+/mob/living/carbon/human/selfDrink(var/obj/item/weapon/reagent_containers/food/drinks/toDrink)
+	if(!check_has_mouth())
+		if(!get_species() == "Machine")
+			src << "Where do you intend to put \the [src]? You don't have a mouth!"
+			return 0
+		else
+			src << "<span class='notice'>You pour a bit of liquid from [toDrink] into your connection port.</span>"
+	else
+		src << "<span class='notice'>You swallow a gulp of [toDrink].</span>"
+	return 1

code/modules/mob/living/carbon/slime/slime.dm

@@ -583,4 +583,10 @@ mob/living/carbon/slime/var/temperature_resistance = T0C+75
 /mob/living/carbon/slime/can_use_vents()
 	if(Victim)
 		return "You cannot ventcrawl while feeding."
-	..()
+	..()
+
+/mob/living/carbon/slime/forceFed(var/obj/item/weapon/reagent_containers/food/toEat, mob/user, fullness)
+	if(istype(toEat, /obj/item/weapon/reagent_containers/food/drinks))
+		return 1
+	user << "This creature does not seem to have a mouth!"
+	return 0