Introduce group basic federation, event new page and notifications

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

lib/mix/tasks/mobilizon/groups.ex

@@ -0,0 +1,17 @@
+defmodule Mix.Tasks.Mobilizon.Groups do
+  @moduledoc """
+  Tasks to manage groups
+  """
+
+  use Mix.Task
+
+  alias Mix.Tasks
+
+  @shortdoc "Manages Mobilizon groups"
+
+  @impl Mix.Task
+  def run(_) do
+    Mix.shell().info("\nAvailable tasks:")
+    Tasks.Help.run(["--search", "mobilizon.groups."])
+  end
+end

lib/mix/tasks/mobilizon/groups/refresh.ex

@@ -0,0 +1,27 @@
+defmodule Mix.Tasks.Mobilizon.Groups.Refresh do
+  @moduledoc """
+  Task to refresh an actor details
+  """
+  use Mix.Task
+  alias Mobilizon.Actors
+  alias Mobilizon.Actors.Actor
+  alias Mobilizon.Federation.ActivityPub.Refresher
+
+  @shortdoc "Refresh a group private informations from an account member"
+
+  @impl Mix.Task
+  def run([group_url, on_behalf_of]) do
+    Mix.Task.run("app.start")
+
+    with %Actor{} = actor <- Actors.get_local_actor_by_name(on_behalf_of) do
+      res = Refresher.fetch_group(group_url, actor)
+      IO.puts(inspect(res))
+    end
+  end
+
+  def run(_) do
+    Mix.raise(
+      "mobilizon.groups.refresh requires a group URL and an actor username which is member of the group as arguments"
+    )
+  end
+end