Adds carcinisoprojection jelly, a limb regrowth chem that is made from slime mutation toxin & blood (#15053)

* Limb regrowth chem, new disease of crab cancer

* Limb regrowth adjustments

* oops, sorry linters.

* oh right this would probably fuck with dullahans

* woops missed a newline

* Update code/modules/reagents/chemistry/reagents/medicine_reagents.dm

Co-authored-by: DeltaFire <46569814+DeltaFire15@users.noreply.github.com>

* just realized this check is unnecessary.

* let's add a mood debuff while we're at it

* Update medicine_reagents.dm

* add a bounty

* misspelling

* Update crabcancer.dm

Co-authored-by: DeltaFire <46569814+DeltaFire15@users.noreply.github.com>

code/modules/cargo/bounties/reagent.dm

@@ -139,6 +139,7 @@
 		/datum/reagent/medicine/atropine,\
 		/datum/reagent/medicine/strange_reagent,\
 		/datum/reagent/medicine/regen_jelly,\
+		/datum/reagent/medicine/limb_regrowth,\
 		/datum/reagent/drug/space_drugs,\
 		/datum/reagent/drug/crank,\
 		/datum/reagent/drug/krokodil,\

code/modules/reagents/chemistry/reagents/medicine_reagents.dm

@@ -1359,7 +1359,7 @@
 
 /datum/reagent/medicine/neo_jelly
 	name = "Neo Jelly"
-	description = "Gradually regenerates all types of damage, without harming slime anatomy.Can OD"
+	description = "Gradually regenerates all types of damage, without harming slime anatomy. Can overdose."
 	reagent_state = LIQUID
 	metabolization_rate = 1 * REAGENTS_METABOLISM
 	color = "#91D865"
@@ -1797,3 +1797,50 @@
 	else
 		M.adjustToxLoss(0.5*REAGENTS_EFFECT_MULTIPLIER)
 	. = 1
+
+/datum/reagent/medicine/limb_regrowth
+	name = "Carcinisoprojection Jelly"
+	description = "Also known as \"limb regrowth jelly\", this crabby looking xenobiological jelly will rapidly regrow any missing limbs someone has at the cost of some of their blood. Do not overdose."
+	taste_description = "salty slime"
+	color = "#EF5428" //like cooked crab!
+	reagent_state = LIQUID
+	overdose_threshold = 65 //it takes more than one bluespace syringe to overdose someone with this given how nasty the OD is.
+	value = REAGENT_VALUE_RARE
+
+/datum/reagent/medicine/limb_regrowth/reaction_mob(mob/living/carbon/C, method=TOUCH, reac_volume)
+	. = ..()
+	if(!.)
+		return
+	if(method == TOUCH) //as funny as it would be to have this hurled at someone, nah.
+		return
+	var/vol = reac_volume + C.reagents.get_reagent_amount(/datum/reagent/medicine/limb_regrowth)
+	if(vol < 5) //need at least 5 units.
+		return
+	var/list/limbs_to_heal = C.get_missing_limbs(exclude_head = TRUE)
+	if(limbs_to_heal.len < 1) //nothing happens if they already got all limbs.
+		return
+	if(HAS_TRAIT(C, TRAIT_ROBOTIC_ORGANISM)) //sorry synths, consider a visit to the roboticist. dunno how to justify regrowing robolimbs.
+		return
+	else if(ishuman(C) && !(HAS_BONE in C.dna?.species?.species_traits)) //boneless have little trouble with the limb chemical.
+		C.visible_message("<span class='notice'>[C] suddenly regrows \his limbs!</span>",
+		"<span class='notice'>You suddenly regrow your limbs, sensation and all!</span>")
+	else //boneful beings get to scream.
+		C.visible_message("<span class='warning'>[C]'s body lets off a grotesque squelching, bone crunching sound as \his limbs grow back rapidly!</span>",
+			"<span class='danger'>Your body emits a grotesque squelching, bone crunching sound as your limbs grow back rapidly! \
+				With the sensation of your regained limbs, also comes pain!</span>",
+			"<span class='italics'>You hear a grotsque squelching noise and the sound of crunching bones.</span>")
+		playsound(C, 'sound/magic/demon_consume.ogg', 50, 1)
+		SEND_SIGNAL(C, COMSIG_ADD_MOOD_EVENT, "painful_limb_regrowth", /datum/mood_event/painful_limb_regrowth)
+		C.emote("scream")
+	C.regenerate_limbs(excluded_limbs = list(BODY_ZONE_HEAD)) //would be a little funky for dullahans if they suddenly sprouted a head.
+	C.blood_volume = max(C.blood_volume - 30*limbs_to_heal.len,0)
+	//lose blood for each limb that was regained.
+	//10 units less expensive than slime limb regrowth, but doesn't check for low blood like the ability, so it could be dangerous.
+	to_chat(C,"<span class='warning'>You feel like this ordeal of your limbs regrowing has made you a little paler... as well as made you feel a little thirsty.</span>")
+	//hint at the blood loss. (paler is a common symptom depicted in-game of low blood, but dehydration is another symptom of low blood.)
+
+
+/datum/reagent/medicine/limb_regrowth/overdose_start(mob/living/M)
+	M.ForceContractDisease(new /datum/disease/crabcancer, FALSE, TRUE) //it is now, time for crab.
+	..()
+	. = 1

code/modules/reagents/chemistry/recipes/medicine.dm

@@ -371,3 +371,9 @@
 	id = /datum/reagent/medicine/system_cleaner
 	results = list(/datum/reagent/medicine/system_cleaner = 4)
 	required_reagents = list(/datum/reagent/iron = 2, /datum/reagent/oil = 2, /datum/reagent/medicine/calomel = 2, /datum/reagent/acetone = 2)
+
+/datum/chemical_reaction/limb_regrowth
+	name = "Carcinisoprojection Jelly"
+	id = /datum/reagent/medicine/limb_regrowth
+	results = list(/datum/reagent/medicine/limb_regrowth = 2)
+	required_reagents = list(/datum/reagent/blood = 1, /datum/reagent/slime_toxin = 1)

code/modules/surgery/bodyparts/helpers.dm

@@ -124,19 +124,25 @@
 /mob/living/carbon/alien/larva/get_leg_ignore()
 	return TRUE
 
-/mob/living/proc/get_missing_limbs()
+/mob/living/proc/get_missing_limbs(exclude_head = FALSE)
 	return list()
 
-/mob/living/carbon/get_missing_limbs()
+/mob/living/carbon/get_missing_limbs(exclude_head = FALSE)
 	var/list/full = list(BODY_ZONE_HEAD, BODY_ZONE_CHEST, BODY_ZONE_R_ARM, BODY_ZONE_L_ARM, BODY_ZONE_R_LEG, BODY_ZONE_L_LEG)
 	for(var/zone in full)
+		if(exclude_head && zone == BODY_ZONE_HEAD) //this is needed in case we don't care for the lack of a dullahan's head or something.
+			full -= zone
+			continue
 		if(get_bodypart(zone))
 			full -= zone
 	return full
 
-/mob/living/carbon/alien/larva/get_missing_limbs()
+/mob/living/carbon/alien/larva/get_missing_limbs(exclude_head = FALSE)
 	var/list/full = list(BODY_ZONE_HEAD, BODY_ZONE_CHEST)
 	for(var/zone in full)
+		if(exclude_head && zone == BODY_ZONE_HEAD) //I guess????
+			full -= zone
+			continue
 		if(get_bodypart(zone))
 			full -= zone
 	return full