AutoSave: Periodic save.

lib/phoenix_auto_save/posts.ex

@@ -73,6 +73,14 @@ defmodule PhoenixAutoSave.Posts do
     |> Repo.update()
   end
 
+  @doc """
+  Updates a post using a changeset.
+  """
+  def update_post(%Ecto.Changeset{} = changeset) do
+    changeset
+    |> Repo.update()
+  end
+
   @doc """
   Deletes a post.
 
@@ -98,7 +106,7 @@ defmodule PhoenixAutoSave.Posts do
       %Ecto.Changeset{source: %Post{}}
 
   """
-  def change_post(%Post{} = post) do
-    Post.changeset(post, %{})
+  def change_post(%Post{} = post, params \\ %{}) do
+    Post.changeset(post, params)
   end
 end

lib/phoenix_auto_save_web/live/post_form_live.ex

@@ -3,12 +3,14 @@ defmodule PhoenixAutoSaveWeb.PostFormLive do
   use Phoenix.HTML
 
   alias PhoenixAutoSave.Posts
+  alias PhoenixAutoSave.Posts.Post
 
   def render(assigns) do
     Phoenix.View.render(PhoenixAutoSaveWeb.PostView, "form.html", assigns)
   end
 
   def mount(_params, session, socket) do
+    schedule_save()
     {
       :ok,
       socket
@@ -19,7 +21,16 @@ defmodule PhoenixAutoSaveWeb.PostFormLive do
   end
 
   def handle_event("change", %{"post" => post_params}, socket) do
-    {:ok, post} = Posts.update_post(socket.assigns.post, post_params)
+    {
+      :noreply,
+      socket
+      |> assign(:changeset, Posts.change_post(socket.assigns.post, post_params))
+    }
+  end
+
+  def handle_info(:store, socket) do
+    {:ok, post} = Posts.update_post(socket.assigns.changeset)
+    schedule_save()
     {
       :noreply,
       socket
@@ -28,4 +39,13 @@ defmodule PhoenixAutoSaveWeb.PostFormLive do
     }
   end
 
+  def terminate(_reason, socket) do
+    {:ok, %Post{}} = Posts.update_post(socket.assigns.changeset)
+    :ok
+  end
+
+  defp schedule_save() do
+    Process.send_after(self(), :store, 10 * 1_000)
+  end
+
 end