Add Sign up ENV flag (#2526)

Why:

* During the beta launch, sign-ups will need to be disabled to make sure
no unexpected accounts are created.

elixir/apps/domain/lib/domain/config.ex

@@ -113,6 +113,10 @@ defmodule Domain.Config do
     end
   end
 
+  def sign_up_enabled? do
+    compile_config!(Definitions, :feature_sign_up_enabled)
+  end
+
   ## Test helpers
 
   if Mix.env() != :test do

elixir/apps/domain/lib/domain/config/definitions.ex

@@ -604,4 +604,13 @@ defmodule Domain.Config.Definitions do
     default: nil,
     changeset: {Logo, :changeset, []}
   )
+
+  ##############################################
+  ## Feature Flags
+  ##############################################
+
+  @doc """
+  Boolean flag to turn Sign-ups on/off.
+  """
+  defconfig(:feature_sign_up_enabled, :boolean, default: true)
 end

elixir/apps/web/lib/web/live/sign_up.ex

@@ -1,6 +1,6 @@
 defmodule Web.SignUp do
   use Web, {:live_view, layout: {Web.Layouts, :public}}
-  alias Domain.{Auth, Accounts, Actors}
+  alias Domain.{Auth, Accounts, Actors, Config}
   alias Web.Registration
 
   defmodule Registration do
@@ -37,6 +37,15 @@ defmodule Web.SignUp do
         actor: %{type: :account_admin_user}
       })
 
+    socket =
+      assign(socket,
+        form: to_form(changeset),
+        account: nil,
+        sign_up_enabled?: Config.sign_up_enabled?()
+      )
+
+    {:ok, socket}
+
     {:ok, assign(socket, form: to_form(changeset), account: nil)}
   end
 
@@ -61,8 +70,9 @@ defmodule Web.SignUp do
               </:separator>
 
               <:item>
-                <.sign_up_form :if={@account == nil} flash={@flash} form={@form} />
-                <.welcome :if={@account} account={@account} />
+                <.sign_up_form :if={@account == nil && @sign_up_enabled?} flash={@flash} form={@form} />
+                <.welcome :if={@account && @sign_up_enabled?} account={@account} />
+                <.sign_up_disabled :if={!@sign_up_enabled?} />
               </:item>
             </.intersperse_blocks>
           </div>
@@ -187,6 +197,29 @@ defmodule Web.SignUp do
     """
   end
 
+  def sign_up_disabled(assigns) do
+    ~H"""
+    <div class="space-y-6">
+      <div class="text-xl text-center text-gray-900 dark:text-white">
+        Sign-ups are currently disabled.
+      </div>
+      <div class="text-center">
+        Please contact
+        <a class={link_style()} href="mailto:sales@firezone.dev?subject=Firezone Sign Up Request">
+          sales@firezone.dev
+        </a>
+        for more information.
+      </div>
+      <p class="text-xs text-center">
+        By signing up you agree to our <.link
+          href="https://www.firezone.dev/terms"
+          class="text-blue-600 dark:text-blue-500 hover:underline"
+        >Terms of Use</.link>.
+      </p>
+    </div>
+    """
+  end
+
   def handle_event("validate", %{"registration" => attrs}, socket) do
     changeset =
       %Registration{}
@@ -206,7 +239,7 @@ defmodule Web.SignUp do
       |> Registration.changeset(attrs)
       |> Map.put(:action, :insert)
 
-    if changeset.valid? do
+    if changeset.valid? && socket.assigns.sign_up_enabled? do
       registration = Ecto.Changeset.apply_changes(changeset)
 
       multi =

elixir/apps/web/test/web/live/sign_up/sign_up_test.exs

@@ -78,4 +78,13 @@ defmodule Web.Live.SignUpTest do
              "registration[email]" => ["has invalid format"]
            }
   end
+
+  test "renders signup disabled message", %{conn: conn} do
+    Domain.Config.put_system_env_override(:feature_sign_up_enabled, false)
+
+    {:ok, _lv, html} = live(conn, ~p"/sign_up")
+
+    assert html =~ "Sign-ups are currently disabled"
+    assert html =~ "sales@firezone.dev"
+  end
 end