[MIRROR] Adds an dart-synthesizing dartgun for CMO/Chemist traitors (#5672)

* Adds an dart-synthesizing dartgun for CMO/Chemist traitors (#35906)

* Syringe dartguns!

* Fix wording

* And then I said, 'I fixed it all!'

* Make it 12TC

* Adds an dart-synthesizing dartgun for CMO/Chemist traitors

code/modules/projectiles/ammunition/special.dm

@@ -65,6 +65,24 @@
 		qdel(S)
 	..()
 
+/obj/item/ammo_casing/chemgun
+	name = "dart synthesiser"
+	desc = "A high-power spring, linked to an energy-based dart synthesiser."
+	projectile_type = /obj/item/projectile/bullet/dart
+	firing_effect_type = null
+
+/obj/item/ammo_casing/chemgun/ready_proj(atom/target, mob/living/user, quiet, zone_override = "")
+	if(!BB)
+		return
+	if(istype(loc, /obj/item/gun/chem))
+		var/obj/item/gun/chem/CG = loc
+		if(CG.syringes_left <= 0)
+			return
+		CG.reagents.trans_to(BB, 15)
+		BB.name = "chemical dart"
+		CG.syringes_left--
+	..()
+
 /obj/item/ammo_casing/dnainjector
 	name = "rigged syringe gun spring"
 	desc = "A high-power spring that throws DNA injectors."

code/modules/projectiles/guns/chem_gun.dm

@@ -0,0 +1,47 @@
+//his isn't a subtype of the syringe gun because the syringegun subtype is made to hold syringes
+//this is meant to hold reagents/obj/item/gun/syringe
+/obj/item/gun/chem
+	name = "reagent gun"
+	desc = "A Nanotrasen syringe gun, modified to automatically synthesise chemical darts, and instead hold reagents."
+	icon_state = "chemgun"
+	item_state = "chemgun"
+	w_class = WEIGHT_CLASS_NORMAL
+	throw_speed = 3
+	throw_range = 7
+	force = 4
+	materials = list(MAT_METAL=2000)
+	clumsy_check = FALSE
+	fire_sound = 'sound/items/syringeproj.ogg'
+	container_type = OPENCONTAINER
+	var/time_per_syringe = 250
+	var/syringes_left = 4
+	var/max_syringes = 4
+	var/last_synth = 0
+
+/obj/item/gun/chem/Initialize()
+	. = ..()
+	chambered = new /obj/item/ammo_casing/chemgun(src)
+	START_PROCESSING(SSobj, src)
+	create_reagents(100)
+
+/obj/item/gun/chem/Destroy()
+	. = ..()
+	STOP_PROCESSING(SSobj, src)
+
+/obj/item/gun/chem/can_shoot()
+	return syringes_left
+
+/obj/item/gun/chem/process_chamber()
+	if(chambered && !chambered.BB && syringes_left)
+		chambered.newshot()
+
+/obj/item/gun/chem/process()
+	if(syringes_left >= max_syringes)
+		return
+	if(world.time < last_synth+time_per_syringe)
+		return
+	to_chat(loc, "<span class='warning'>You hear a click as [src] synthesizes a new dart.</span>")
+	syringes_left++
+	if(chambered && !chambered.BB)
+		chambered.newshot()
+	last_synth = world.time