Add join/leave group

lib/mobilizon/actors/member.ex

@@ -1,17 +1,29 @@
+import EctoEnum
+
+defenum(Mobilizon.Actors.MemberRoleEnum, :member_role_type, [
+  :not_approved,
+  :member,
+  :moderator,
+  :administrator,
+  :creator
+])
+
 defmodule Mobilizon.Actors.Member do
   @moduledoc """
   Represents the membership of an actor to a group
   """
   use Ecto.Schema
+
   import Ecto.Changeset
+  import Ecto.Query, warn: false
+  import Mobilizon.Ecto
+
   alias Mobilizon.Actors.Member
   alias Mobilizon.Actors.Actor
   alias Mobilizon.Repo
 
   schema "members" do
-    field(:approved, :boolean, default: true)
-    # 0 : Member, 1 : Moderator, 2 : Admin
-    field(:role, :integer, default: 0)
+    field(:role, Mobilizon.Actors.MemberRoleEnum, default: :member)
     belongs_to(:parent, Actor)
     belongs_to(:actor, Actor)
 
@@ -21,7 +33,7 @@ defmodule Mobilizon.Actors.Member do
   @doc false
   def changeset(%Member{} = member, attrs) do
     member
-    |> cast(attrs, [:role, :approved, :parent_id, :actor_id])
+    |> cast(attrs, [:role, :parent_id, :actor_id])
     |> validate_required([:parent_id, :actor_id])
     |> unique_constraint(:parent_id, name: :members_actor_parent_unique_index)
   end
@@ -36,11 +48,27 @@ defmodule Mobilizon.Actors.Member do
     end
   end
 
-  def is_administrator(%Member{role: 2}) do
-    {:is_admin, true}
+  @doc """
+  Gets a single member of an actor (for example a group)
+  """
+  def can_be_joined(%Actor{type: :Group, openness: :invite_only}), do: false
+  def can_be_joined(%Actor{type: :Group}), do: true
+
+  @doc """
+  Returns the list of administrator members for a group.
+  """
+  def list_administrator_members_for_group(id, page \\ nil, limit \\ nil) do
+    Repo.all(
+      from(
+        m in Member,
+        where: m.parent_id == ^id and (m.role == ^:creator or m.role == ^:administrator),
+        preload: [:actor]
+      )
+      |> paginate(page, limit)
+    )
   end
 
-  def is_administrator(%Member{}) do
-    {:is_admin, false}
-  end
+  def is_administrator(%Member{role: :administrator}), do: {:is_admin, true}
+  def is_administrator(%Member{role: :creator}), do: {:is_admin, true}
+  def is_administrator(%Member{}), do: {:is_admin, false}
 end