Adds the emp bomb, and a beacon to summon it. (#14737)

* Adds the emp bomb

* Allows traitors to buy it, corrects mistake in syndicate uplink

Also prevents explosions from setting it off

* Update code/game/machinery/syndicatebomb.dm

Co-authored-by: SteelSlayer <42044220+SteelSlayer@users.noreply.github.com>

* Update code/game/objects/items/devices/radio/beacon.dm

Co-authored-by: SteelSlayer <42044220+SteelSlayer@users.noreply.github.com>

* steels suggestion

* Dave's request

Co-authored-by: SteelSlayer <42044220+SteelSlayer@users.noreply.github.com>

code/datums/uplink_item.dm

@@ -997,7 +997,7 @@ GLOBAL_LIST_INIT(uplink_items, subtypesof(/datum/uplink_item))
 
 /datum/uplink_item/explosives/syndicate_bomb
 	name = "Syndicate Bomb"
-	desc = "The Syndicate Bomb has an adjustable timer with a minimum setting of 60 seconds. Ordering the bomb sends you a small beacon, which will teleport the explosive to your location when you activate it. \
+	desc = "The Syndicate Bomb has an adjustable timer with a minimum setting of 90 seconds. Ordering the bomb sends you a small beacon, which will teleport the explosive to your location when you activate it. \
 	You can wrench the bomb down to prevent removal. The crew may attempt to defuse the bomb."
 	reference = "SB"
 	item = /obj/item/radio/beacon/syndicate/bomb
@@ -1005,6 +1005,16 @@ GLOBAL_LIST_INIT(uplink_items, subtypesof(/datum/uplink_item))
 	surplus = 0
 	cant_discount = TRUE
 
+/datum/uplink_item/explosives/emp_bomb
+	name = "EMP bomb"
+	desc = "The EMP has an adjustable timer with a minimum setting of 90 seconds. Ordering the bomb sends you a small beacon, which will teleport the explosive to your location when you activate it. \
+	You can wrench the bomb down to prevent removal. The crew may attempt to defuse the bomb."
+	reference = "SBEMP"
+	item = /obj/item/radio/beacon/syndicate/bomb/emp
+	cost = 10
+	surplus = 0
+	cant_discount = TRUE
+
 /datum/uplink_item/explosives/syndicate_minibomb
 	name = "Syndicate Minibomb"
 	desc = "The minibomb is a grenade with a five-second fuse."

code/game/machinery/syndicatebomb.dm

@@ -273,6 +273,12 @@
 	desc = "A salvaged syndicate device gutted of its explosives to be used as a training aid for aspiring bomb defusers."
 	payload = /obj/item/bombcore/training
 
+/obj/machinery/syndicatebomb/emp
+	name = "emp bomb"
+	icon_state = "emp-bomb"
+	desc = "A large bomb, seemingly made to make a large electromagnetic pulse."
+	payload = /obj/item/bombcore/emp
+
 /obj/machinery/syndicatebomb/badmin
 	name = "generic summoning badmin bomb"
 	desc = "Oh god what is in this thing?"
@@ -449,6 +455,35 @@
 	range_light = 4
 	range_flame = 2
 
+/obj/item/bombcore/emp
+	name = "EMP bomb core"
+	var/light_emp = 36
+	var/heavy_emp = 18
+	var/pulse_number = 1 //Since one EMP wont destroy anything other then consoles and IPCS, here is an option to have multiple pulses when dentonating. DO NOT USE THIS WITH REALLY LARGE AREAS
+	var/adminlogged = FALSE //If it exploded once, don't do it again.
+
+/obj/item/bombcore/emp/ex_act(severity) //It's an EMP bomb, not a chemical explosive
+	return
+
+/obj/item/bombcore/emp/burn()
+	return
+
+/obj/item/bombcore/emp/detonate()
+	if(adminlog && !adminlogged)
+		message_admins(adminlog)
+		log_game(adminlog)
+		adminlogged = TRUE
+	empulse(src, heavy_emp, light_emp, 1)
+	if(pulse_number <= 1)
+		src.visible_message("<span class='warning'>The bomb's core burns out, and the bomb disintegrates into ash.</span>")
+		new /obj/effect/decal/cleanable/ash(get_turf(src))
+		if(loc && istype(loc, /obj/machinery/syndicatebomb))
+			qdel(loc)
+		qdel(src)
+	else
+		pulse_number -= 1
+		addtimer(CALLBACK(src, .proc/detonate), 20) // every 2 seconds go off again till pulses run out
+
 /obj/item/bombcore/chemical
 	name = "chemical payload"
 	desc = "An explosive payload designed to spread chemicals, dangerous or otherwise, across a large area. It is able to hold up to four chemical containers, and must be loaded before use."

code/game/objects/items/devices/radio/beacon.dm

@@ -76,15 +76,20 @@
 	name = "suspicious beacon"
 	desc = "A label on it reads: <i>Warning: Activating this device will send a high-ordinance explosive to your location</i>."
 	origin_tech = "bluespace=5;syndicate=5"
+	var/bomb = /obj/machinery/syndicatebomb
 
 /obj/item/radio/beacon/syndicate/bomb/attack_self(mob/user)
 	if(user)
 		to_chat(user, "<span class='notice'>Locked In</span>")
-		new /obj/machinery/syndicatebomb( user.loc )
+		new bomb(user.loc)
 		playsound(src, 'sound/effects/pop.ogg', 100, 1, 1)
 		user.drop_item()
 		qdel(src)
 
+/obj/item/radio/beacon/syndicate/bomb/emp
+	desc = "A label on it reads: <i>Warning: Activating this device will send a high-ordinance EMP explosive to your location</i>."
+	bomb = /obj/machinery/syndicatebomb/emp
+
 /obj/item/radio/beacon/engine
 	desc = "A label on it reads: <i>Warning: This device is used for transportation of high-density objects used for high-yield power generation. Stay away!</i>."
 	anchored = 1		//Let's not move these around. Some folk might get the idea to use these for assassinations