Introduce the group activity section

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

lib/service/activity/resource.ex

@@ -0,0 +1,50 @@
+defmodule Mobilizon.Service.Activity.Resource do
+  @moduledoc """
+  Insert an resource activity
+  """
+  alias Mobilizon.Actors
+  alias Mobilizon.Resources.Resource
+  alias Mobilizon.Service.Activity
+  alias Mobilizon.Service.Workers.ActivityBuilder
+
+  @behaviour Activity
+
+  @impl Activity
+  def insert_activity(resource, options \\ [])
+
+  def insert_activity(
+        %Resource{actor_id: actor_id, creator_id: creator_id} = resource,
+        options
+      )
+      when not is_nil(actor_id) do
+    actor = Actors.get_actor(creator_id)
+    group = Actors.get_actor(actor_id)
+    subject = Keyword.fetch!(options, :subject)
+    old_resource = Keyword.get(options, :old_resource)
+
+    ActivityBuilder.enqueue(:build_activity, %{
+      "type" => "resource",
+      "subject" => subject,
+      "subject_params" => subject_params(resource, subject, old_resource),
+      "group_id" => group.id,
+      "author_id" => actor.id,
+      "object_type" => "resource",
+      "object_id" => if(subject != "resource_deleted", do: to_string(resource.id), else: nil),
+      "inserted_at" => DateTime.utc_now()
+    })
+  end
+
+  @impl Activity
+  def insert_activity(_, _), do: {:ok, nil}
+
+  @spec subject_params(Resource.t(), String.t() | nil, Resource.t() | nil) :: map()
+  defp subject_params(%Resource{} = resource, "resource_renamed", old_resource) do
+    resource
+    |> subject_params(nil, nil)
+    |> Map.put(:old_resource_title, old_resource.title)
+  end
+
+  defp subject_params(%Resource{path: path, title: title}, _, _) do
+    %{resource_path: path, resource_title: title}
+  end
+end