Move TLS options for system emails to new deliver_system_email!/1 function

Author: wmnnd

Diff for: config/runtime.exs

@@ -1,7 +1,6 @@
 import Config
 require Logger
 :ok == Application.ensure_started(:logger)
-:ok == Application.ensure_started(:tls_certificate_check)
 
 exit_from_exception = fn exception, message ->
   Logger.error(exception.message)
@@ -85,18 +84,10 @@ if config_env() == :prod do
             relay: host,
             username: user,
             password: password,
-            from_email: from_email
+            from_email: from_email,
+            ssl: ssl?
           ]
           |> put_if_not_empty.(:port, port)
-          |> then(fn config ->
-            if ssl? do
-              config
-              |> Keyword.put(:ssl, true)
-              |> Keyword.put(:sockopts, :tls_certificate_check.options(host))
-            else
-              config
-            end
-          end)
       end
 
     config(:keila, Keila.Mailer, config)

Diff for: lib/keila/auth/emails.ex

@@ -7,7 +7,7 @@ defmodule Keila.Auth.Emails do
   def send!(email, params) do
     email
     |> build(params)
-    |> Keila.Mailer.deliver!()
+    |> Keila.Mailer.deliver_system_email!()
   end
 
   @spec build(:activate, %{url: String.t(), user: Keila.Auth.User.t()}) :: term() | no_return()

Diff for: lib/keila/mailer.ex

@@ -3,6 +3,26 @@ defmodule Keila.Mailer do
   alias Keila.Mailings.Sender
   alias Keila.Mailings.SharedSender
 
+  @doc """
+  Delivers an email using the configured system mailer.
+  """
+  @spec deliver_system_email!(Swoosh.Email.t()) :: term()
+  def deliver_system_email!(email) do
+    config =
+      Application.get_env(:keila, __MODULE__)
+      |> maybe_put_tls_opts()
+
+    deliver!(email, config)
+  end
+
+  defp maybe_put_tls_opts(config) do
+    if Keyword.get(config, :ssl) do
+      Keyword.put(config, :sockopts, :tls_certificate_check.options(config[:relay]))
+    else
+      config
+    end
+  end
+
   @doc """
   Delivers an email using a given sender.
   """