server - adjust rate limiter - reply/thread mod update

lib/myapp/rate_limiter.ex

@@ -4,14 +4,19 @@ defmodule MyApp.RateLimiter do
   def new_reply_key, do: 1
   def new_thread_key, do: 2
 
-  @spec limit(String.t, integer, integer) :: {:ok, String.t} | {:error, String.t}
-  def limit(end_point, user_id, seconds) do
+  @spec set_limit(String.t, integer, integer) :: {:ok, String.t}
+  def set_limit(end_point, user_id, seconds) do
+    key = "rl#{end_point}:#{user_id}"
+    Cachex.set(:myapp, key, true, ttl: :timer.seconds(seconds))
+    {:ok, "ok"}
+  end
+
+  @spec check_limit(String.t, integer) :: {:ok, String.t} | {:error, String.t}
+  def check_limit(end_point, user_id) do
     key = "rl#{end_point}:#{user_id}"
     case Cachex.get(:myapp, key) do
-      {:missing, _} ->
-        Cachex.set(:myapp, key, true, ttl: :timer.seconds(seconds))
-        {:ok, "ok"}
       {:ok, _} -> {:error, "limit reached"}
+      {:missing, _} -> {:ok, "ok"}
     end
   end