Introduce backend for reports

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/mobilizon/email/admin.ex

@@ -0,0 +1,38 @@
+defmodule Mobilizon.Email.Admin do
+  @moduledoc """
+  Handles emails sent to admins
+  """
+  alias Mobilizon.Users.User
+
+  import Bamboo.Email
+  import Bamboo.Phoenix
+  use Bamboo.Phoenix, view: Mobilizon.EmailView
+  import MobilizonWeb.Gettext
+  alias Mobilizon.Reports.Report
+
+  def report(%User{email: email} = _user, %Report{} = report, locale \\ "en") do
+    Gettext.put_locale(locale)
+    instance_url = get_config(:hostname)
+
+    base_email()
+    |> to(email)
+    |> subject(gettext("Mobilizon: New report on instance %{instance}", instance: instance_url))
+    |> put_header("Reply-To", get_config(:email_reply_to))
+    |> assign(:report, report)
+    |> assign(:instance, instance_url)
+    |> render(:report)
+  end
+
+  defp base_email do
+    # Here you can set a default from, default headers, etc.
+    new_email()
+    |> from(get_config(:email_from))
+    |> put_html_layout({Mobilizon.EmailView, "email.html"})
+    |> put_text_layout({Mobilizon.EmailView, "email.text"})
+  end
+
+  @spec get_config(atom()) :: any()
+  defp get_config(key) do
+    Mobilizon.CommonConfig.instance_config() |> Keyword.get(key)
+  end
+end