NTNet Extensibility (#22908)

Fixes https://github.com/Aurorastation/Aurora.3/issues/21944

Spiritual successor of
https://github.com/Aurorastation/Aurora.3/pull/22352
Cherrypicked changes from the C3 Crew Management branch, this PR
contains all NTNet extensibility features, including Field Relay
construction, off-site camera usage (contingent on standing up remote
hardware and being out of jamming), etc. This also fixes a handful of
outstanding telecomms and view/mobeye-related bugs adjacent to where I
was working.

changes:
- rscadd: "Adds NTNet extensibility, requires new machinery constructed
on away-site z-levels."
- rscadd: "Breaks NTNet Relay machinery into Quantum Relay ('core' obj
on Horizon) and Field Relay (deployable off-site constructions)."
- qol: "Embedded cameras (basically every video camera EXCEPT those
which are installed on walls) can now be viewed from NTNet-connected
z-level, not just connected ones."
- rscadd: "Adds several public camera monitor consoles to the Horizon
(near where public sensor grid feed consoles already exist)."
- rscadd: "Adds some spare camera console boards to Horizon technical
storage."
- qol: "Adds action button for 'cancel-camera-view' verb while viewing
cameras or looking up/down z-level."
- bugfix: "Fixes Jockey comms (frequency was missing from ANTAG_FREQS)."
- bugfix: "Fixes look-up/look-down actions intermittently failing
without first using cancel-camera-view."

code/modules/mob/abstract/freelook/ai/update_triggers.dm

@@ -13,6 +13,6 @@
 			on_open_network = TRUE
 			GLOB.cameranet.add_source(src)
 	else
-		GLOB.cameranet.update_visibility(src)
+		GLOB.cameranet.update_visibility(src, FALSE)
 
 	invalidateCameraCache()

code/modules/mob/living/carbon/human/human.dm

@@ -2325,9 +2325,7 @@
 
 /mob/living/proc/look_up_open_space(var/turf/T)
 	if(client && !MOB_IS_INCAPACITATED(INCAPACITATION_DISABLED))
-		if(z_eye)
-			reset_view(null)
-			QDEL_NULL(z_eye)
+		if(z_eye && clear_z_eye())
 			return
 		var/turf/above = GET_TURF_ABOVE(T)
 		if(TURF_IS_MIMICING(above))
@@ -2348,9 +2346,7 @@
 
 /mob/living/proc/look_down_open_space(var/turf/T)
 	if(client && !MOB_IS_INCAPACITATED(INCAPACITATION_DISABLED))
-		if(z_eye)
-			reset_view(null)
-			QDEL_NULL(z_eye)
+		if(z_eye && clear_z_eye())
 			return
 		if(TURF_IS_MIMICING(T) && GET_TURF_BELOW(T))
 			z_eye = new /atom/movable/z_observer/z_down(T, src, T)

code/modules/mob/living/living.dm

@@ -923,6 +923,9 @@ default behaviour is:
 
 /mob/living/Destroy()
 	cameraFollow = null
+	if(camera_view_cancel_action)
+		camera_view_cancel_action.Remove(src)
+		QDEL_NULL(camera_view_cancel_action)
 	if (length(actions))
 		for (var/datum/action/action in actions)
 			action.Remove(src)

code/modules/mob/living/living_defense.dm

@@ -502,6 +502,8 @@
 		if(A.CheckRemoval(src))
 			A.Remove(src)
 
+	update_camera_view_action()
+
 	for(var/obj/item/I in src)
 		if(!I.action_button_name)
 			continue
@@ -549,6 +551,41 @@
 
 	return
 
+/mob/living/proc/is_viewing_z_eye()
+	return client && z_eye && client.eye == z_eye
+
+/mob/living/is_viewing_remote_view()
+	return ..() || is_viewing_z_eye()
+
+/mob/living/proc/clear_z_eye()
+	if(!z_eye)
+		return FALSE
+	var/was_viewing_z_eye = is_viewing_z_eye()
+	if(was_viewing_z_eye)
+		reset_view(null)
+	QDEL_NULL(z_eye)
+	update_camera_view_action()
+	return was_viewing_z_eye
+
+/mob/living/proc/update_camera_view_action()
+	if(is_viewing_remote_view())
+		if(!camera_view_cancel_action)
+			camera_view_cancel_action = new
+		camera_view_cancel_action.Grant(src)
+	else if(camera_view_cancel_action?.owner)
+		camera_view_cancel_action.Remove(src)
+
+/mob/living/proc/cancel_remote_view()
+	if(istype(machine, /obj/structure/machinery/computer/ship))
+		var/obj/structure/machinery/computer/ship/ship_console = machine
+		if(ship_console.viewing_overmap(src))
+			ship_console.unlook(src)
+			update_camera_view_action()
+			return
+
+	cancel_camera()
+	update_camera_view_action()
+
 /mob/living/update_action_buttons()
 	if(!hud_used) return
 	if(!client) return

code/modules/mob/living/living_defines.dm

@@ -27,6 +27,7 @@
 
 	var/mob/living/cameraFollow = null
 	var/list/datum/action/actions = list()
+	var/datum/action/cancel_camera_view/camera_view_cancel_action
 
 	/// Time of death
 	var/tod = null

code/modules/mob/living/silicon/pai/pai.dm

@@ -270,7 +270,7 @@
 		src.unset_machine()
 		src.reset_view(null)
 		return 0
-	if (stat == 2 || !C.status || !(src.network in C.network)) return 0
+	if (stat == 2 || !C.can_use() || !(src.network in C.network)) return 0
 
 	// ok, we're alive, camera is good and in our network...
 

code/modules/mob/mob.dm

@@ -411,8 +411,20 @@
 			else
 				client.perspective = EYE_PERSPECTIVE
 				client.eye = loc
+	if(istype(src, /mob/living))
+		var/mob/living/living_mob = src
+		living_mob.update_camera_view_action()
 	return
 
+/mob/proc/is_viewing_camera()
+	return client && istype(client.eye, /obj/structure/machinery/camera)
+
+/mob/proc/is_viewing_overmap()
+	return client && istype(client.eye, /obj/effect/overmap)
+
+/mob/proc/is_viewing_remote_view()
+	return is_viewing_camera() || is_viewing_overmap()
+
 
 /mob/proc/show_inv(mob/user)
 	user.set_machine(src)
@@ -716,6 +728,9 @@
 	set name = "Cancel Camera View"
 	set category = "OOC"
 	unset_machine()
+	if(isliving(src))
+		var/mob/living/living_mob = src
+		living_mob.clear_z_eye()
 	reset_view(null)
 
 /mob/Topic(href, href_list)