Makes the admin logout tracking system actually work

code/modules/admin/admin.dm

@@ -1001,3 +1001,22 @@ var/gamma_ship_location = 1 // 0 = station , 1 = space
 		qdel(frommob)
 
 		return 1
+
+// Returns a list of the number of admins in various categories
+// result[1] is the number of staff that match the rank mask and are active
+// result[2] is the number of staff that do not match the rank mask
+// result[3] is the number of staff that match the rank mask and are inactive
+/proc/staff_countup(rank_mask = R_BAN)
+	var/list/result = list(0, 0, 0)
+	for(var/client/X in admins)
+		if(rank_mask && !check_rights_for(X, rank_mask))
+			result[2]++
+			continue
+		if(X.holder.fakekey)
+			result[2]++
+			continue
+		if(X.is_afk())
+			result[3]++
+			continue
+		result[1]++
+	return result

code/modules/mob/logout.dm

@@ -3,15 +3,19 @@
 	unset_machine()
 	player_list -= src
 	log_access("Logout: [key_name(src)]")
-	if(admin_datums[src.ckey])
-		if(ticker && ticker.current_state == GAME_STATE_PLAYING) //Only report this stuff if we are currently playing.
-			var/admins_number = admins.len
-
+	// `holder` is nil'd out by now, so we check the `admin_datums` array directly
+	//Only report this stuff if we are currently playing.
+	if(admin_datums[ckey] && ticker && ticker.current_state == GAME_STATE_PLAYING)
+		var/datum/admins/temp_admin = admin_datums[ckey]
+		// Triggers on people with banhammer power only - no mentors tripping the alarm
+		if(temp_admin.rights & R_BAN)
 			message_admins("Admin logout: [key_name_admin(src)]")
-			if(admins_number == 0) //Apparently the admin logging out is no longer an admin at this point, so we have to check this towards 0 and not towards 1. Awell.
-				send2adminirc("[key_name(src)] logged out - no more admins online.")
+			var/list/admincounter = staff_countup(R_BAN)
+			if(admincounter[1] == 0) // No active admins
+				send2irc(config.admin_notify_irc, "[key_name(src)] logged out - No active admins, [admincounter[2]] non-admin staff, [admincounter[3]] inactive staff.")
+
 	..()
-	
-	callHook("mob_logout", list("client" = client, "mob" = src))	
-	
-	return 1
+
+	callHook("mob_logout", list("client" = client, "mob" = src))
+
+	return 1