Rewrites grenade launchers

code/modules/projectiles/guns/launcher/grenade_launcher.dm

@@ -0,0 +1,82 @@
+/obj/item/weapon/gun/launcher/grenade
+	name = "grenade launcher"
+	desc = "A bulky pump-action grenade launcher. Holds up to 5 grenades in a revolving magazine."
+	icon = 'icons/obj/gun.dmi'
+	icon_state = "riotgun"
+	item_state = "riotgun"
+	w_class = 4
+	force = 10
+
+	fire_sound = 'sound/weapons/empty.ogg'
+	fire_sound_text = "a metallic thunk"
+	recoil = 0
+	throw_distance = 7
+	release_force = 5
+
+	var/obj/item/weapon/grenade/chambered
+	var/list/grenades = new/list()
+	var/max_grenades = 4 //holds this + one in the chamber
+	matter = list("metal" = 2000)
+
+//revolves the magazine, allowing players to choose between multiple grenade types
+/obj/item/weapon/gun/launcher/grenade/proc/pump(mob/M as mob)
+	playsound(M, 'sound/weapons/shotgunpump.ogg', 60, 1)
+
+	var/obj/item/weapon/grenade/next
+	if(grenades.len)
+		next = grenades[1] //get this first, so that the chambered grenade can still be removed if the grenades list is empty
+	if(chambered)
+		grenades += chambered //rotate the revolving magazine
+		chambered = null
+	if(next)
+		grenades -= next //Remove grenade from loaded list.
+		chambered = next
+		M << "<span class='warning'>You pump [src], loading \a [next] into the chamber.</span>"
+	else
+		M << "<span class='warning'>You pump [src], but the magazine is empty.</span>"
+	update_icon()
+
+/obj/item/weapon/gun/launcher/grenade/examine(mob/user)
+	if(..(user, 2))
+		var/grenade_count = grenades.len + (chambered? 1 : 0)
+		user << "Has [grenade_count] grenade\s remaining."
+		if(chambered)
+			user << "\A [chambered] is chambered."
+
+/obj/item/weapon/gun/launcher/grenade/attack_self(mob/user)
+	pump(user)
+
+/obj/item/weapon/gun/launcher/grenade/attackby(obj/item/I, mob/user)
+	if((istype(I, /obj/item/weapon/grenade)))
+		if(grenades.len >= max_grenades)
+			user << "<span class='warning'>[src] is full.</span>"
+			return
+		user.remove_from_mob(I)
+		I.loc = src
+		grenades.Insert(1, I) //add to the head of the list, so that it is loaded on the next pump
+		user.visible_message("[user] inserts \a [I] into [src].", "<span class='notice'>You insert \a [I] into [src].</span>")
+	else
+		..()
+
+/obj/item/weapon/gun/launcher/grenade/attack_hand(mob/user)
+	if(src in user)
+		if(grenades.len)
+			var/obj/item/weapon/grenade/G = grenades[grenades.len]
+			grenades.len--
+			user.put_in_hands(G)
+			user.visible_message("[user] removes \a [G] from [src].", "<span class='notice'>You remove \a [G] from [src].</span>")
+		else
+			user << "<span class='warning'>[src] is empty.</span>"
+	else
+		..()
+
+/obj/item/weapon/gun/launcher/grenade/consume_next_projectile()
+	if(chambered)
+		chambered.det_time = 10
+		chambered.activate(null)
+	return chambered
+		
+/obj/item/weapon/gun/launcher/grenade/handle_post_fire(mob/user)
+	message_admins("[key_name_admin(user)] fired a grenade ([chambered.name]) from a grenade launcher ([src.name]).")
+	log_game("[key_name_admin(user)] used a grenade ([chambered.name]).")
+	chambered = null