[MIRROR] Integrated circuits for modular computers (#26196)

Integrated circuits for modular computers (#80530)

This PR integrates circuits for modular computers and a good bits of
their programs.
The peculiarity here is that modular computers have no fixed amount of
unremovable components (except the base one with just a couple ports for
now), instead, they're added and removed along with programs. With a few
exceptions (such as the messenger and signaler), for these program
circuits to work, their associated program has to be either open or in
the background.

For a reason or another, not all programs have a circuit associated to
them, still, however the programs with a circuit are still a handful.
They are:
- Nanotrasen Pay System
- Notepad
- SiliConnect
- WireCarp
- MODsuit Control
- Spectre Meter
- Direct Messenger*
- LifeConnect
- Custodial Locator
- Fission360
- Camera
- Status Display
- SignalCommander

*By the by, sending messages has a cooldown, so it shouldn't be as
spammy. If it turns out to not be enough, I can make it so messages from
circuit will be ignored by other messenger circuits.

The PR is no longer WIP.

I believe modular computers could make for some interesting setups with
circuits, since they're fairly flexible and stocked with features unlike
many other appliances, therefore also a speck more abusable, though
limits, cooldowns, logging and sanitization have been implemented to
keep it in check.

🆑
add: Modular Computers now support integrated circuits. What can be done
with them depends on the programs installed and whether they're running
(open or background).
add: Modular Consoles (the machinery) now have a small backup cell they
draw power from if the power goes out.
/🆑

Co-authored-by: Ghom <42542238+Ghommie@users.noreply.github.com>

code/modules/modular_computers/file_system/programs/maintenance/camera.dm

@@ -8,6 +8,7 @@
 	can_run_on_flags = PROGRAM_PDA
 	tgui_id = "NtosCamera"
 	program_icon = "camera"
+	circuit_comp_type = /obj/item/circuit_component/mod_program/camera
 
 	/// Camera built-into the tablet.
 	var/obj/item/camera/internal_camera
@@ -16,6 +17,48 @@
 	/// How many pictures were taken already, used for the camera's TGUI photo display
 	var/picture_number = 1
 
+/obj/item/circuit_component/mod_program/camera
+	associated_program = /datum/computer_file/program/maintenance/camera
+	circuit_flags = CIRCUIT_FLAG_INPUT_SIGNAL
+
+	///A target to take a picture of.
+	var/datum/port/input/picture_target
+	///The photographed target
+	var/datum/port/output/photographed
+
+/obj/item/circuit_component/mod_program/camera/populate_ports()
+	. = ..()
+	picture_target = add_input_port("Picture Target", PORT_TYPE_ATOM)
+	photographed = add_output_port("Photographed Entity", PORT_TYPE_ATOM)
+
+/obj/item/circuit_component/mod_program/camera/register_shell(atom/movable/shell)
+	. = ..()
+	var/datum/computer_file/program/maintenance/camera/cam = associated_program
+	RegisterSignal(cam.internal_camera, COMSIG_CAMERA_IMAGE_CAPTURED, PROC_REF(on_image_captured))
+
+/obj/item/circuit_component/mod_program/camera/unregister_shell()
+	var/datum/computer_file/program/maintenance/camera/cam = associated_program
+	UnregisterSignal(cam.internal_camera, COMSIG_CAMERA_IMAGE_CAPTURED)
+	return ..()
+
+/obj/item/circuit_component/mod_program/camera/input_received(datum/port/input/port)
+	var/atom/target = picture_target.value
+	if(!target)
+		var/turf/our_turf = get_location()
+		target = locate(our_turf.x, our_turf.y, our_turf.z)
+		if(!target)
+			return
+	var/datum/computer_file/program/maintenance/camera/cam = associated_program
+	if(!cam.internal_camera.can_target(target))
+		return
+	var/pic_size_x = cam.internal_camera.picture_size_x - 1
+	var/pic_size_y = cam.internal_camera.picture_size_y - 1
+	INVOKE_ASYNC(cam.internal_camera, TYPE_PROC_REF(/obj/item/camera, captureimage), target, null, pic_size_x, pic_size_y)
+
+/obj/item/circuit_component/mod_program/camera/proc/on_image_captured(obj/item/camera/source, atom/target, mob/user)
+	SIGNAL_HANDLER
+	photographed.set_output(target)
+
 /datum/computer_file/program/maintenance/camera/on_install()
 	. = ..()
 	internal_camera = new(computer)
@@ -50,13 +93,13 @@
 
 	return data
 
-/datum/computer_file/program/maintenance/camera/ui_act(action, params, datum/tgui/ui)
-	var/mob/living/user = usr
+/datum/computer_file/program/maintenance/camera/ui_act(action, params, datum/tgui/ui, datum/ui_state/state)
+	. = ..()
 	switch(action)
 		if("print_photo")
 			if(computer.stored_paper <= 0)
 				to_chat(usr, span_notice("Hardware error: Printer out of paper."))
 				return
-			internal_camera.printpicture(user, internal_picture)
+			internal_camera.printpicture(usr, internal_picture)
 			computer.stored_paper--
 			computer.visible_message(span_notice("\The [computer] prints out a paper."))