Emitter: The Emitting (#92327)

## About The Pull Request
Adds Diode Disks, installable disks that when fitted into an emitter can
change its function.
* Healing
* Stamina damage, and heals the SM slightly at the cost of internal
energy
* Traitor engi only explosive that damages and supercharges the SM if
used that way. Firerate is halved.
* Incendiary that slightly damages the SM but has lots of energy
* Sanity damaging one that improves SM psi coeff
* Magnetic item attracting one that improves SM mol absorption.
## Why It's Good For The Game
Fun and unique ways for Engi to use excess power or improve their SM
setups. Could also lead to neat engi inventions such as, say, a circuit
device that aims and fires a healing emitter at anyone nearby who is
damaged. Should also incentivize the researching of useful techs, hence
why important medium tier techs are what lock the different disks.
## Changelog
🆑
add: New Diode Disks which allow you to configurate emitters with
special functions.
add: New Engi & CE exclusive traitor item, a diode disk that causes an
emitter to create low radius explosions when it hits things. Note that
this will reduce the fire-rate of your emitter.
/🆑

---------

Co-authored-by: ThrowawayUseless <notarealemail@emailservice.fake>
Co-authored-by: necromanceranne <40847847+necromanceranne@users.noreply.github.com>

code/modules/power/singularity/emitter.dm

@@ -27,6 +27,10 @@
 	var/maximum_fire_delay = 10 SECONDS
 	///Min delay before firing
 	var/minimum_fire_delay = 2 SECONDS
+	///Modifier to the preceeding two numbers
+	var/fire_rate_mod = 1
+	///Deactivates the "pause every 3 shots" system
+	var/no_shot_counter = FALSE
 	///When was the last shot
 	var/last_shot = 0
 	///Number of shots made (gets reset every few shots)
@@ -57,6 +61,8 @@
 	var/charge = 0
 	///stores the direction and orientation of the last projectile
 	var/last_projectile_params
+	//the disk in the gun
+	var/obj/item/emitter_disk/diskie
 
 /obj/machinery/power/emitter/Initialize(mapload)
 	. = ..()
@@ -125,7 +131,7 @@
 	else if(!powered)
 		. += span_notice("Its status display is glowing faintly.")
 	else
-		. += span_notice("Its status display reads: Emitting one beam between <b>[DisplayTimeText(minimum_fire_delay)]</b> and <b>[DisplayTimeText(maximum_fire_delay)]</b>.")
+		. += span_notice("Its status display reads: Emitting one beam between <b>[DisplayTimeText(minimum_fire_delay * fire_rate_mod)]</b> and <b>[DisplayTimeText(maximum_fire_delay * fire_rate_mod)]</b>.")
 		. += span_notice("Power consumption at <b>[display_power(active_power_usage, convert = FALSE)]</b>.")
 
 /obj/machinery/power/emitter/should_have_node()
@@ -246,11 +252,11 @@
 		projectile.fire(dir2angle(dir))
 	if(!manual)
 		last_shot = world.time
-		if(shot_number < 3)
-			fire_delay = 20
+		if(shot_number < 3 || no_shot_counter)
+			fire_delay = 20 * fire_rate_mod
 			shot_number ++
 		else
-			fire_delay = rand(minimum_fire_delay,maximum_fire_delay)
+			fire_delay = rand(minimum_fire_delay,maximum_fire_delay) * fire_rate_mod
 			shot_number = 0
 	return projectile
 
@@ -311,6 +317,8 @@
 /obj/machinery/power/emitter/crowbar_act(mob/living/user, obj/item/item)
 	if(panel_open && gun)
 		return remove_gun(user)
+	if(panel_open && diskie)
+		return remove_disk(user)
 	default_deconstruction_crowbar(item)
 	return TRUE
 
@@ -343,8 +351,30 @@
 		wires.interact(user)
 		return
 	if(panel_open && !gun && istype(item,/obj/item/gun/energy))
+		if(diskie)
+			to_chat(user, span_warning("Remove the Diode Disk before inserting a gun."))
+			return
 		if(integrate(item,user))
 			return
+	if(panel_open && !gun && istype(item,/obj/item/emitter_disk))
+		var/obj/item/emitter_disk/config_disk = item
+		if(!user.transferItemToLoc(config_disk, src))
+			balloon_alert(user, "stuck in hand!")
+			return
+		if(diskie)
+			user.put_in_hands(diskie)
+			balloon_alert(user, "disks swapped!")
+		else
+			balloon_alert(user, "disk inserted")
+		diskie = config_disk
+		projectile_type = diskie.stored_proj
+		projectile_sound = diskie.stored_sound
+		fire_rate_mod = diskie.fire_rate_mod
+		no_shot_counter = diskie.no_shot_counter
+		playsound(src, 'sound/machines/card_slide.ogg', 50)
+		to_chat(user, span_notice("You update the [src]'s diode configuration with the [config_disk]."))
+		if(diskie.consumable)
+			qdel(diskie)
 	return ..()
 
 
@@ -373,6 +403,19 @@
 	set_projectile()
 	return TRUE
 
+/obj/machinery/power/emitter/proc/remove_disk(mob/user)
+	if(!diskie)
+		return
+	if(diskie.consumed_on_removal)
+		qdel(diskie)
+	else
+		user.put_in_hands(diskie)
+	diskie = null
+	playsound(src, 'sound/machines/card_slide.ogg', 50, TRUE)
+	set_projectile()
+	return TRUE
+
+
 /obj/machinery/power/emitter/proc/set_projectile()
 	if(LAZYLEN(gun_properties))
 		if(mode || !gun_properties["lethal_projectile"])
@@ -384,6 +427,8 @@
 		return
 	projectile_type = initial(projectile_type)
 	projectile_sound = initial(projectile_sound)
+	fire_rate_mod = initial(fire_rate_mod)
+	no_shot_counter = initial(no_shot_counter)
 
 /obj/machinery/power/emitter/emag_act(mob/user, obj/item/card/emag/emag_card)
 	if(obj_flags & EMAGGED)
@@ -569,3 +614,58 @@
 	req_access = list("science")
 	welded = TRUE
 	use_power = NO_POWER_USE
+
+/obj/item/emitter_disk
+	name = "/improper Diode Disk: Debugger"
+	desc = "This disk can be used on an emitter with an open panel to reset its projectile. Unless this was handed to you by an admin, you should report this on github."
+	icon = 'icons/obj/devices/circuitry_n_data.dmi'
+	icon_state = "datadisk6"
+	var/stored_proj = /obj/projectile/beam/emitter/hitscan
+	var/stored_sound = 'sound/items/weapons/emitter.ogg'
+	var/consumed_on_removal = TRUE
+	var/consumable = TRUE
+	var/fire_rate_mod = 1
+	var/no_shot_counter = FALSE
+
+/obj/item/emitter_disk/stamina
+	name = "/improper Diode Disk: Electrodisruptive"
+	desc = "This disk can be used on an emitter with an open panel to make it shoot lasers which will increase the integrity of supermatter crystals and exhaust living creatures. The disk will be consumed in the process."
+	stored_proj = /obj/projectile/beam/emitter/hitscan/bluelens
+	consumed_on_removal = FALSE
+	consumable = FALSE
+
+/obj/item/emitter_disk/healing
+	name = "/improper Diode Disk: Bioregenerative"
+	desc = "This disk can be installed into an emitter with an open panel to make it shoot lasers which will heal the physical damages of living creatures."
+	stored_proj = /obj/projectile/beam/emitter/hitscan/bioregen
+	consumed_on_removal = FALSE
+	consumable = FALSE
+
+/obj/item/emitter_disk/incendiary
+	name = "/improper Diode Disk: Conflagratory"
+	desc = "This disk can be used on an emitter with an open panel to make it shoot lasers which will set living creatures ablaze."
+	stored_proj = /obj/projectile/beam/emitter/hitscan/incend
+	consumed_on_removal = FALSE
+	consumable = FALSE
+
+/obj/item/emitter_disk/sanity
+	name = "/improper Diode Disk: Psychosiphoning"
+	desc = "This disk can be used on an emitter with an open panel to make it shoot lasers which will depress living creatures and calm supermatter crystals."
+	stored_proj = /obj/projectile/beam/emitter/hitscan/psy
+	consumed_on_removal = FALSE
+	consumable = FALSE
+
+/obj/item/emitter_disk/magnetic
+	name = "/improper Diode Disk: Magnetogenerative"
+	desc = "This disk can be used on an emitter with an open panel to make it shoot lasers which will attract nearby objects."
+	stored_proj = /obj/projectile/beam/emitter/hitscan/magnetic
+	consumed_on_removal = FALSE
+	consumable = FALSE
+
+/obj/item/emitter_disk/blast
+	name = "/improper Diode Disk: Hyperconcussive"
+	desc = "This disk, loaded with proprietary syndicate firmware, can be used on an emitter with an open panel to make it shoot beams of concussive force which will cause small explosions."
+	stored_proj = /obj/projectile/beam/emitter/hitscan/blast
+	consumed_on_removal = FALSE
+	consumable = FALSE
+	fire_rate_mod = 2