Fixes #6229 - tripwire mines not working

code/modules/assembly/infrared.dm

@@ -7,12 +7,16 @@
 
 	bomb_name = "tripwire mine"
 
+	secured = 0 // toggle_secure()'ed in New() for correct adding to processing_objects, won't work otherwise
+	dir = EAST
 	var/on = 0
-	var/visible = 0
+	var/visible = 1
 	var/obj/effect/beam/i_beam/first = null
 	var/obj/effect/beam/i_beam/last = null
 	var/max_nesting_level = 10
 	var/turf/fire_location
+	var/emission_cycles = 0
+	var/emission_cap = 20
 
 /obj/item/device/assembly/infra/Destroy()
 	if(first)
@@ -22,7 +26,11 @@
 	return ..()
 
 /obj/item/device/assembly/infra/describe()
-	return "The infrared trigger is [on?"on":"off"]."
+	return "The assembly is [secured?"secure":"not secure"]. The infrared trigger is [on?"on":"off"]."
+
+/obj/item/device/assembly/infra/examine(mob/user)
+	..()
+	to_chat(user, describe())
 
 /obj/item/device/assembly/infra/activate()
 	if(!..())	return 0//Cooldown check
@@ -36,11 +44,22 @@
 		processing_objects.Add(src)
 	else
 		on = 0
-		if(first)	qdel(first)
+		if(first)
+			qdel(first)
 		processing_objects.Remove(src)
 	update_icon()
 	return secured
 
+/obj/item/device/assembly/infra/New()
+	..()
+	if (!secured)
+		toggle_secure()
+
+/obj/item/device/assembly/infra/proc/arm() // Forces the device to arm no matter its current state.
+	if (!secured) // Checked because arm() might be called sometime after the object is spawned.
+		toggle_secure()
+	on = 1
+
 /obj/item/device/assembly/infra/update_icon()
 	overlays.Cut()
 	attached_overlays = list()
@@ -71,18 +90,21 @@
 	return null
 
 /obj/item/device/assembly/infra/process()
-	if(!on || fire_location != get_turf(loc))
-		if(first)
-			qdel(first)
-			return
+	var/turf/T = get_turf(src)
+	if(first && (!on || !fire_location || fire_location != T || emission_cycles >= emission_cap))
+		qdel(first)
+		return
+	if(!on)
+		return
 	if(!secured)
 		return
 	if(first && last)
 		last.process()
+		emission_cycles++
 		return
-	var/turf/T = get_valid_loc()
 	if(T)
 		fire_location = T
+		emission_cycles = 0
 		var/obj/effect/beam/i_beam/I = new /obj/effect/beam/i_beam(T)
 		I.master = src
 		I.density = 1
@@ -124,6 +146,8 @@
 		return 0
 	pulse(0)
 	audible_message("[bicon(src)] *beep* *beep*", null, 3)
+	if(first)
+		qdel(first)
 	cooldown = 2
 	spawn(10)
 		process_cooldown()
@@ -177,6 +201,21 @@
 	if(usr.machine == src)
 		interact(usr)
 
+	if(first)
+		qdel(first)
+
+
+
+/obj/item/device/assembly/infra/armed/New()
+	..()
+	spawn(3)
+		if(holder)
+			if(holder.master)
+				dir = holder.master.dir
+		arm()
+
+/obj/item/device/assembly/infra/armed/stealth
+	visible = 0
 
 
 /***************************IBeam*********************************/
@@ -191,6 +230,8 @@
 	var/limit = null
 	var/visible = 0.0
 	var/left = null
+	var/life_cycles = 0
+	var/life_cap = 20
 	anchored = 1.0
 	pass_flags = PASSTABLE | PASSGLASS | PASSGRILLE
 
@@ -209,7 +250,8 @@
 	transform = turn(matrix(), dir2angle(dir))
 
 /obj/effect/beam/i_beam/process()
-	if((loc.density || !(master)))
+	life_cycles++
+	if(loc.density || !master || life_cycles >= life_cap)
 		qdel(src)
 		return
 	if(left > 0)