Add webpush front-end support

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

lib/service/activity/renderer/group.ex

@@ -0,0 +1,58 @@
+defmodule Mobilizon.Service.Activity.Renderer.Group do
+  @moduledoc """
+  Insert a comment activity
+  """
+  alias Mobilizon.Activities.Activity
+  alias Mobilizon.Actors.Actor
+  alias Mobilizon.Service.Activity.Renderer
+  alias Mobilizon.Web.{Endpoint, Gettext}
+  alias Mobilizon.Web.Router.Helpers, as: Routes
+  import Mobilizon.Web.Gettext, only: [dgettext: 3]
+
+  @behaviour Renderer
+
+  @impl Renderer
+  def render(%Activity{} = activity, options) do
+    locale = Keyword.get(options, :locale, "en")
+    Gettext.put_locale(locale)
+
+    case activity.subject do
+      :post_created ->
+        %{
+          body:
+            dgettext("activity", "The post %{post} was created by %{profile}.", %{
+              profile: profile(activity),
+              post: title(activity)
+            }),
+          url: post_url(activity)
+        }
+
+      :post_updated ->
+        %{
+          body:
+            dgettext("activity", "The post %{post} was updated by %{profile}.", %{
+              profile: profile(activity),
+              post: title(activity)
+            }),
+          url: post_url(activity)
+        }
+
+      :post_deleted ->
+        %{
+          body:
+            dgettext("activity", "The post %{post} was deleted by %{profile}.", %{
+              profile: profile(activity),
+              post: title(activity)
+            }),
+          url: post_url(activity)
+        }
+    end
+  end
+
+  defp post_url(activity) do
+    Routes.page_url(Endpoint, :post, activity.subject_params["post_slug"])
+  end
+
+  defp profile(activity), do: Actor.display_name_and_username(activity.author)
+  defp title(activity), do: activity.subject_params["post_title"]
+end