Adds the Anti-Surveillance Tool for Traitors.

Adds a traitor device to warn the traitor if they're being spied or are about to be spied on by the AI or anyone using a camera console.
It will warn the holder by changing color, beeping a specific tone, and sending a message to their chat log.  It only does this when the state of spying changes, so it will not spam the chatlog if nothing changes.  Only the holder can hear the warnings.  It also functions like a regular multitool.

code/datums/uplink/tools.dm

@@ -66,6 +66,14 @@
 			When in hacking mode this device will grant full access to any standard airlock within 20 to 40 seconds. \
 			This device will also be able to immediately access the last 6 to 8 hacked airlocks."
 
+/datum/uplink_item/item/tools/hacking_tool
+	name = "Anti-Surveillance Tool"
+	item_cost = 20
+	path = /obj/item/device/multitool/ai_detector
+	desc = "This functions like a normal multitool, but includes an integrated camera network sensor that will warn the holder if they are being \
+	watched, by changing color and beeping.  It is able to detect both AI visual surveillance and security camera utilization from terminals, and \
+	will give different warnings by beeping and changing colors based on what it detects.  Only the holder can hear the warnings."
+
 /datum/uplink_item/item/tools/emag
 	name = "Cryptographic Sequencer"
 	item_cost = 30

code/game/machinery/camera/camera.dm

@@ -37,6 +37,8 @@
 
 	var/client_huds = list()
 
+	var/list/camera_computers_using_this = list()
+
 /obj/machinery/camera/New()
 	wires = new(src)
 	assembly = new(src)

code/game/machinery/computer/camera.dm

@@ -169,6 +169,7 @@
 
 	src.current_camera = C
 	if(current_camera)
+		current_camera.camera_computers_using_this.Add(src)
 		use_power = 2
 		var/mob/living/L = current_camera.loc
 		if(istype(L))
@@ -176,6 +177,7 @@
 
 /obj/machinery/computer/security/proc/reset_current()
 	if(current_camera)
+		current_camera.camera_computers_using_this.Remove(src)
 		var/mob/living/L = current_camera.loc
 		if(istype(L))
 			L.tracking_cancelled()

code/game/objects/items/devices/ai_detector.dm

@@ -0,0 +1,121 @@
+#define PROXIMITY_OFF_CAMERANET		"_no_camera"
+#define PROXIMITY_NONE				""
+#define PROXIMITY_NEAR				"_yellow"
+#define PROXIMITY_ON_SCREEN			"_red"
+#define PROXIMITY_TRACKING			"_tracking"
+#define PROXIMITY_TRACKING_FAIL		"_tracking_fail"
+
+// This is another syndie-multitool, except this one detects when the AI and/or Security is peeping on the holder.
+
+/obj/item/device/multitool/ai_detector
+	var/range_alert = 7			// Will turn red if the AI can observe its holder.
+	var/range_warning = 14		// Will turn yellow if the AI's eye is near the holder.
+	var/detect_state = PROXIMITY_NONE
+	origin_tech = list(TECH_MAGNET = 2, TECH_ENGINEERING = 2, TECH_ILLEGAL = 2)
+
+/obj/item/device/multitool/ai_detector/New()
+	// It's really really unlikely for the view range to change.  But why not be futureproof anyways?
+	range_alert = world.view
+	range_warning = world.view * 2
+	processing_objects += src
+	..()
+
+/obj/item/device/multitool/ai_detector/Destroy()
+	processing_objects -= src
+	return ..()
+
+/obj/item/device/multitool/ai_detector/process()
+	var/old_detect_state = detect_state
+	var/new_detect_state = detect_ai()
+	detect_state = new_detect_state
+	update_icon()
+	update_warning(old_detect_state, new_detect_state)
+	return
+
+// This also detects security using cameras.
+/obj/item/device/multitool/ai_detector/proc/detect_ai()
+	var/mob/living/carrier = isliving(loc) ? loc : null
+
+	// First, let's check if any AIs are actively tracking them.
+	for(var/mob/living/silicon/ai/AI in silicon_mob_list)
+		if(carrier && AI.cameraFollow == carrier)
+			if(!carrier.tracking_status()) // Successful tracking returns a 0, so we need to invert it.
+				return PROXIMITY_TRACKING
+			else
+				return PROXIMITY_TRACKING_FAIL
+
+	// If there's no turf then cameras won't do anything anyways.
+	var/turf/T = get_turf(src)
+	if(!T)
+		return PROXIMITY_OFF_CAMERANET
+
+	// Security is also a concern, so we need to see if any cameras are in use.
+	// Note that this will trigger upon the security console being used, regardless if someone is actually watching,
+	// because there isn't a nice way to test if someone is actually looking.  Probably better that way too.
+	var/list/our_local_area = range(range_alert, T)
+	for(var/obj/machinery/camera/C in our_local_area)
+		if(C.camera_computers_using_this.len) // Only check cameras actively being used.
+			var/list/their_local_area = C.can_see(range_alert)
+			if(T in their_local_area)
+				return PROXIMITY_ON_SCREEN
+
+	// Now for the somewhat harder AI cameranet checks.
+
+	// Check if we are even on the cameranet.
+	if(!cameranet.checkVis(T))
+		return PROXIMITY_OFF_CAMERANET
+
+	var/datum/chunk/chunk = cameranet.getChunk(T.x, T.y, T.z)
+	if(!chunk)
+		return PROXIMITY_OFF_CAMERANET
+
+	// Check if the AI eye is able to see us, or if it's almost able to.
+	if(chunk.seenby.len)
+		for(var/mob/observer/eye/aiEye/A in chunk.seenby)
+			var/turf/detect_turf = get_turf(A)
+			if(get_dist(T, detect_turf) <= range_alert)
+				return PROXIMITY_ON_SCREEN
+			if(get_dist(T, detect_turf) <= range_warning)
+				return PROXIMITY_NEAR
+
+	// If we reach this point, AI or sec isn't near us.
+	return PROXIMITY_NONE
+
+/obj/item/device/multitool/ai_detector/update_icon()
+	icon_state = "[initial(icon_state)][detect_state]"
+
+/obj/item/device/multitool/ai_detector/proc/update_warning(var/old_state, var/new_state)
+	var/mob/living/carrier = isliving(loc) ? loc : null
+
+	// Now to warn our holder, if the state changes.
+	if(!carrier)
+		return
+
+	if(new_state != old_state)
+		switch(new_state)
+			if(PROXIMITY_OFF_CAMERANET)
+				to_chat(carrier, "<span class='notice'>\icon[src] Now outside of camera network.</span>")
+				carrier << 'sound/machines/defib_failed.ogg'
+			if(PROXIMITY_NONE)
+				to_chat(carrier, "<span class='notice'>\icon[src] Now within camera network, AI and cameras unfocused.</span>")
+				carrier << 'sound/machines/defib_safetyOff.ogg'
+			if(PROXIMITY_NEAR)
+				to_chat(carrier, "<span class='warning'>\icon[src] Warning: AI focus at nearby location.</span>")
+				carrier << 'sound/machines/defib_SafetyOn.ogg'
+			if(PROXIMITY_ON_SCREEN)
+				to_chat(carrier, "<font size='3'><span class='danger'>\icon[src] Alert: AI or camera focused at current location!</span></font>")
+				carrier <<'sound/machines/defib_ready.ogg'
+			if(PROXIMITY_TRACKING)
+				to_chat(carrier, "<font size='3'><span class='danger'>\icon[src] Danger: AI is actively tracking you!</span></font>")
+				carrier << 'sound/machines/defib_success.ogg'
+			if(PROXIMITY_TRACKING_FAIL)
+				to_chat(carrier, "<font size='3'><span class='danger'>\icon[src] Danger: AI is attempting to actively track you, but you are outside of the camera network!</span></font>")
+				carrier <<'sound/machines/defib_ready.ogg'
+
+
+#undef PROXIMITY_OFF_CAMERANET
+#undef PROXIMITY_NONE
+#undef PROXIMITY_NEAR
+#undef PROXIMITY_ON_SCREEN
+#undef PROXIMITY_TRACKING
+#undef PROXIMITY_TRACKING_FAIL

polaris.dme

@@ -776,6 +776,7 @@
 #include "code\game\objects\items\shooting_range.dm"
 #include "code\game\objects\items\toys.dm"
 #include "code\game\objects\items\trash.dm"
+#include "code\game\objects\items\devices\ai_detector.dm"
 #include "code\game\objects\items\devices\aicard.dm"
 #include "code\game\objects\items\devices\binoculars.dm"
 #include "code\game\objects\items\devices\chameleonproj.dm"