Introduce backend for reports

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

lib/mobilizon/admin.ex

@@ -0,0 +1,48 @@
+defmodule Mobilizon.Admin do
+  @moduledoc """
+  The Admin context.
+  """
+
+  import Ecto.Query, warn: false
+  alias Mobilizon.Repo
+  import Mobilizon.Ecto
+
+  alias Mobilizon.Admin.ActionLog
+
+  @doc """
+  Returns the list of action_logs.
+
+  ## Examples
+
+      iex> list_action_logs()
+      [%ActionLog{}, ...]
+
+  """
+  @spec list_action_logs(integer(), integer()) :: list(ActionLog.t())
+  def list_action_logs(page \\ nil, limit \\ nil) do
+    from(
+      r in ActionLog,
+      preload: [:actor]
+    )
+    |> paginate(page, limit)
+    |> Repo.all()
+  end
+
+  @doc """
+  Creates a action_log.
+
+  ## Examples
+
+      iex> create_action_log(%{field: value})
+      {:ok, %ActionLog{}}
+
+      iex> create_action_log(%{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def create_action_log(attrs \\ %{}) do
+    %ActionLog{}
+    |> ActionLog.changeset(attrs)
+    |> Repo.insert()
+  end
+end