Nitrogen Breather Quirk!

modular_doppler/modular_quirks/nitrogen_breather/equipping.dm

@@ -0,0 +1,61 @@
+/datum/quirk/equipping
+	abstract_parent_type = /datum/quirk/equipping
+	quirk_flags = QUIRK_HUMAN_ONLY|QUIRK_CHANGES_APPEARANCE
+	icon = FA_ICON_BOX_OPEN
+	/// the items that will be equipped, formatted in the way of [item_path = list of slots it can be equipped to], will not equip over nodrop items
+	var/list/items = list()
+	/// the items that will be forcefully equipped, formatted in the way of [item_path = list of slots it can be equipped to], will equip over nodrop items
+	var/list/forced_items = list()
+	/// did we force drop any items? if so, they're in this list. useful for transferring any applicable contents into new items on roundstart
+	var/list/force_dropped_items = list()
+
+/datum/quirk/equipping/add_unique(client/client_source)
+	var/mob/living/carbon/carbon_holder = quirk_holder
+	if (!items || !carbon_holder)
+		return
+	var/list/equipped_items = list()
+	var/list/all_items = forced_items|items
+	for (var/obj/item/item_path as anything in all_items)
+		if (!ispath(item_path))
+			continue
+		var/item = new item_path(carbon_holder.loc)
+		var/success = FALSE
+		// Checking for nodrop and seeing if there's an empty slot
+		for (var/slot as anything in all_items[item_path])
+			success = force_equip_item(carbon_holder, item, slot, check_item = FALSE)
+			if (success)
+				break
+		// Checking for nodrop
+		for (var/slot as anything in all_items[item_path])
+			success = force_equip_item(carbon_holder, item, slot)
+			if (success)
+				break
+
+		if ((item_path in forced_items) && !success)
+			// Checking for nodrop failed, shove it into the first available slot, even if it has nodrop
+			for (var/slot as anything in all_items[item_path])
+				success = force_equip_item(carbon_holder, item, slot, FALSE)
+				if (success)
+					break
+		equipped_items[item] = success
+	for (var/item as anything in equipped_items)
+		on_equip_item(item, equipped_items[item])
+
+/datum/quirk/equipping/proc/force_equip_item(mob/living/carbon/target, obj/item/item, slot, check_nodrop = TRUE, check_item = TRUE)
+	var/obj/item/item_in_slot = target.get_item_by_slot(slot)
+	if (check_item && item_in_slot)
+		if (check_nodrop && HAS_TRAIT(item_in_slot, TRAIT_NODROP))
+			return FALSE
+		target.dropItemToGround(item_in_slot, force = TRUE)
+		force_dropped_items += item_in_slot
+		RegisterSignal(item_in_slot, COMSIG_QDELETING, PROC_REF(dropped_items_cleanup))
+
+	return target.equip_to_slot_if_possible(item, slot, disable_warning = TRUE) // this should never not work tbh
+
+/datum/quirk/equipping/proc/dropped_items_cleanup(obj/item/source)
+	SIGNAL_HANDLER
+
+	force_dropped_items -= source
+
+/datum/quirk/equipping/proc/on_equip_item(obj/item/equipped, success)
+	return

modular_doppler/modular_quirks/nitrogen_breather/lungs.dm

@@ -0,0 +1,9 @@
+/obj/item/organ/internal/lungs/nitrogen
+	name = "nitrogen lungs"
+	desc = "A set of lungs for breathing nitrogen."
+	safe_oxygen_min = 0	//Dont need oxygen
+	safe_oxygen_max = 2 //But it is quite toxic
+	safe_nitro_min = 10 // Atleast 10 nitrogen
+	oxy_damage_type = TOX
+	oxy_breath_dam_min = 6
+	oxy_breath_dam_max = 20

modular_doppler/modular_quirks/nitrogen_breather/nitrogen_tanks.dm

@@ -0,0 +1,41 @@
+/obj/item/tank/internals/nitrogen
+	name = "nitrogen tank"
+	desc = "A small tank of nitrogen, for crew who don't breathe the standard air mix."
+	icon_state = "oxygen_fr"
+	force = 10
+	distribute_pressure = TANK_DEFAULT_RELEASE_PRESSURE
+
+/obj/item/tank/internals/nitrogen/populate_gas()
+	air_contents.assert_gas(/datum/gas/nitrogen)
+	air_contents.gases[/datum/gas/nitrogen][MOLES] = (3*ONE_ATMOSPHERE)*volume/(R_IDEAL_GAS_EQUATION*T20C)
+
+/obj/item/tank/internals/nitrogen/full/populate_gas()
+	air_contents.assert_gas(/datum/gas/nitrogen)
+	air_contents.gases[/datum/gas/nitrogen][MOLES] = (10*ONE_ATMOSPHERE)*volume/(R_IDEAL_GAS_EQUATION*T20C)
+
+/obj/item/tank/internals/nitrogen/belt
+	icon = 'modular_doppler/modular_quirks/nitrogen_breather/icons/tank.dmi'
+	worn_icon = 'modular_doppler/modular_quirks/nitrogen_breather/icons/belt.dmi'
+	lefthand_file = 'modular_doppler/modular_quirks/nitrogen_breather/icons/tanks_lefthand.dmi'
+	righthand_file = 'modular_doppler/modular_quirks/nitrogen_breather/icons/tanks_righthand.dmi'
+	icon_state = "nitrogen_extended"
+	inhand_icon_state = "nitrogen"
+	slot_flags = ITEM_SLOT_BELT
+	force = 5
+	volume = 24
+	w_class = WEIGHT_CLASS_SMALL
+
+/obj/item/tank/internals/nitrogen/belt/full/populate_gas()
+	air_contents.assert_gas(/datum/gas/nitrogen)
+	air_contents.gases[/datum/gas/nitrogen][MOLES] = (10*ONE_ATMOSPHERE)*volume/(R_IDEAL_GAS_EQUATION*T20C)
+
+/obj/item/tank/internals/nitrogen/belt/emergency
+	name = "emergency nitrogen tank"
+	desc = "Used for emergencies. Contains very little nitrogen, so try to conserve it until you actually need it."
+	icon_state = "nitrogen"
+	worn_icon_state = "nitrogen_extended"
+	volume = 3
+
+/obj/item/tank/internals/nitrogen/belt/emergency/populate_gas()
+	air_contents.assert_gas(/datum/gas/nitrogen)
+	air_contents.gases[/datum/gas/nitrogen][MOLES] = (10*ONE_ATMOSPHERE)*volume/(R_IDEAL_GAS_EQUATION*T20C)

modular_doppler/modular_quirks/nitrogen_breather/quirk.dm

@@ -0,0 +1,91 @@
+/datum/quirk/equipping/lungs
+	abstract_parent_type = /datum/quirk/equipping/lungs
+	icon = FA_ICON_LUNGS
+	var/obj/item/organ/internal/lungs/lungs_holding
+	var/obj/item/organ/internal/lungs/lungs_added
+	var/lungs_typepath = /obj/item/organ/internal/lungs
+	items = list(/obj/item/clothing/accessory/breathing = list(ITEM_SLOT_BACKPACK))
+	var/breath_type = "oxygen"
+
+/datum/quirk/equipping/lungs/add(client/client_source)
+	var/mob/living/carbon/human/carbon_holder = quirk_holder
+	if (!istype(carbon_holder) || !lungs_typepath)
+		return
+	var/current_lungs = carbon_holder.get_organ_slot(ORGAN_SLOT_LUNGS)
+	if (istype(current_lungs, lungs_typepath))
+		return
+	lungs_holding = current_lungs
+	if(!isnull(lungs_holding))
+		lungs_holding.organ_flags |= ORGAN_FROZEN // stop decay on the old lungs
+	lungs_added = new lungs_typepath
+	lungs_added.Insert(carbon_holder, special = TRUE)
+	if(!isnull(lungs_holding))
+		lungs_holding.moveToNullspace() // save them for later
+
+/datum/quirk/equipping/lungs/remove()
+	var/mob/living/carbon/carbon_holder = quirk_holder
+	if (!istype(carbon_holder) || !istype(lungs_holding))
+		return
+	var/obj/item/organ/internal/lungs/lungs = carbon_holder.get_organ_slot(ORGAN_SLOT_LUNGS)
+	if (lungs != lungs_added && lungs != lungs_holding)
+		qdel(lungs_holding)
+		return
+	lungs_holding.Insert(carbon_holder, special = TRUE, movement_flags = DELETE_IF_REPLACED)
+	lungs_holding.organ_flags &= ~ORGAN_FROZEN
+
+/datum/quirk/equipping/lungs/on_equip_item(obj/item/equipped, success)
+	var/mob/living/carbon/human/human_holder = quirk_holder
+	if (!istype(equipped, /obj/item/clothing/accessory/breathing))
+		return
+	var/obj/item/clothing/accessory/breathing/acc = equipped
+	acc.breath_type = breath_type
+
+	var/obj/item/clothing/under/attach_to = human_holder?.w_uniform
+	if (attach_to && acc.can_attach_accessory(attach_to, human_holder))
+		acc.attach(human_holder.w_uniform, human_holder)
+
+/obj/item/clothing/accessory/breathing
+	name = "breathing dogtag"
+	desc = "Dogtag that lists what you breathe."
+	icon_state = "allergy"
+	above_suit = FALSE
+	minimize_when_attached = TRUE
+	attachment_slot = CHEST
+	var/breath_type
+
+/obj/item/clothing/accessory/breathing/examine(mob/user)
+	. = ..()
+	. += "The dogtag reads: I breathe [breath_type]."
+
+/obj/item/clothing/accessory/breathing/accessory_equipped(obj/item/clothing/under/uniform, user)
+	. = ..()
+	RegisterSignal(uniform, COMSIG_ATOM_EXAMINE, PROC_REF(on_examine))
+
+/obj/item/clothing/accessory/breathing/accessory_dropped(obj/item/clothing/under/uniform, user)
+	. = ..()
+	UnregisterSignal(uniform, COMSIG_ATOM_EXAMINE)
+
+/obj/item/clothing/accessory/breathing/proc/on_examine(datum/source, mob/user, list/examine_list)
+	SIGNAL_HANDLER
+	examine_list += "The dogtag reads: I breathe [breath_type]."
+
+/datum/quirk/equipping/lungs/nitrogen
+	name = "Nitrogen Breather"
+	desc = "You breathe nitrogen, even if you might not normally breathe it. Oxygen is poisonous."
+	icon = FA_ICON_LUNGS_VIRUS
+	medical_record_text = "Patient can only breathe nitrogen."
+	gain_text = "<span class='danger'>You suddenly have a hard time breathing anything but nitrogen."
+	lose_text = "<span class='notice'>You suddenly feel like you aren't bound to nitrogen anymore."
+	value = 0
+	forced_items = list(
+		/obj/item/clothing/mask/breath = list(ITEM_SLOT_MASK),
+		/obj/item/tank/internals/nitrogen/belt/full = list(ITEM_SLOT_HANDS, ITEM_SLOT_LPOCKET, ITEM_SLOT_RPOCKET))
+	lungs_typepath = /obj/item/organ/internal/lungs/nitrogen
+	breath_type = "nitrogen"
+
+/datum/quirk/equipping/lungs/nitrogen/on_equip_item(obj/item/equipped, success)
+	. = ..()
+	var/mob/living/carbon/carbon_holder = quirk_holder
+	if (!success || !istype(carbon_holder) || !istype(equipped, /obj/item/tank/internals))
+		return
+	carbon_holder.internal = equipped

tgstation.dme

@@ -6879,6 +6879,10 @@
 #include "modular_doppler\modular_quirks\left_handed\left_handed.dm"
 #include "modular_doppler\modular_quirks\linguist\linguist.dm"
 #include "modular_doppler\modular_quirks\night_vision\night_vision.dm"
+#include "modular_doppler\modular_quirks\nitrogen_breather\equipping.dm"
+#include "modular_doppler\modular_quirks\nitrogen_breather\lungs.dm"
+#include "modular_doppler\modular_quirks\nitrogen_breather\nitrogen_tanks.dm"
+#include "modular_doppler\modular_quirks\nitrogen_breather\quirk.dm"
 #include "modular_doppler\modular_quirks\overwrites\musician.dm"
 #include "modular_doppler\modular_quirks\paycheck_rations\code\quirk.dm"
 #include "modular_doppler\modular_quirks\paycheck_rations\code\rationpacks.dm"