Preparatory work

lib/birdy_chat_web/api/messages/controller.ex

@@ -0,0 +1,20 @@
+defmodule BirdyChatWeb.Api.Messages.Controller do
+  use BirdyChatWeb, :controller
+
+  def create(conn, params) do
+    case BirdyChat.Message.validate(params) do
+      {:ok, changeset} ->
+        case BirdyChat.Message.write(changeset.changes) do
+          {:ok, msg} ->
+            conn
+            |> put_status(:created)
+            |> render(:create, message: msg)
+        end
+
+      {:error, changeset} ->
+        conn
+        |> put_status(:unprocessable_entity)
+        |> render(:error, changeset: changeset)
+    end
+  end
+end