stateful server 2

lib/pledge_controller.ex

@@ -4,7 +4,7 @@ defmodule Servy.PledgeController do
 
   def create(conv, %{"name" => name, "amount" => amount}) do
     # sends pledge to the external service and caches it
-    PledgeServer.create_pledge(name, String.to_integer(amount))
+    Servy.PledgeServer.create_pledge(name, String.to_integer(amount))
 
     %{conv | status: 201, resp_body: "#{name} pledged #{amount}!"}
   end

lib/pledge_server.ex

@@ -1,8 +1,34 @@
 defmodule Servy.PledgeServer do
-  def create_pledge(name, amount) do
-    {:ok, id} = send_pledge_to_service(name, amount)
+  def listen_loop(state) do
+    IO.puts("\nWaiting for a message...")
+
+    receive do
+      {:create_pledge, name, amount} ->
+        {:ok, id} = send_pledge_to_service(name, amount)
+        new_state = [{name, amount} | state]
+        IO.puts("#{name} pledged #{amount}!")
+        IO.puts("New state is #{inspect(new_state)}")
+        listen_loop(new_state)
+
+      {sender, :recent_pledges} ->
+        send(sender, {:response, state})
+        IO.puts("Sent pledges to #{inspect(sender)}")
+        listen_loop(state)
+    end
   end
 
+  # def create_pledge(name, amount) do
+  #   {:ok, id} = send_pledge_to_service(name, amount)
+
+  #   # Cache the pledge:
+  #   [{"larry, 10"}]
+  # end
+
+  # def recent_pledge do
+  #   # Returns the most recent pledges (cache):
+  #   [{"larry, 10"}]
+  # end
+
   defp send_pledge_to_service(_name, _amount) do
     # CODE GOES HERE TO SEND PLEDGE TO EXTERNAL SERVICE
     {:ok, "pledge-#{:rand.uniform(1000)}"}