Introduce admin and moderator role, check role on list_users action

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

Add test for guards

lib/mobilizon/users/service/tools.ex

@@ -31,3 +31,13 @@ defmodule Mobilizon.Users.Service.Tools do
     |> Base.url_encode64()
   end
 end
+
+defmodule Mobilizon.Users.Guards do
+  @moduledoc """
+  Guards for users
+  """
+
+  defguard is_admin(role) when is_atom(role) and role == :administrator
+
+  defguard is_moderator(role) when is_atom(role) and role in [:administrator, :moderator]
+end

lib/mobilizon/users/user.ex

@@ -1,3 +1,11 @@
+import EctoEnum
+
+defenum(Mobilizon.Users.UserRoleEnum, :user_role_type, [
+  :administrator,
+  :moderator,
+  :user
+])
+
 defmodule Mobilizon.Users.User do
   @moduledoc """
   Represents a local user
@@ -12,7 +20,7 @@ defmodule Mobilizon.Users.User do
     field(:email, :string)
     field(:password_hash, :string)
     field(:password, :string, virtual: true)
-    field(:role, :integer, default: 0)
+    field(:role, Mobilizon.Users.UserRoleEnum, default: :user)
     has_many(:actors, Actor)
     belongs_to(:default_actor, Actor)
     field(:confirmed_at, :utc_datetime)