Revert "Revert "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