Possibility to unban a user

#1843

lib/graphql/resolvers/user.ex

@@ -610,6 +610,28 @@ defmodule Mobilizon.GraphQL.Resolvers.User do
     end
   end
 
+  def unban_account(_parent, %{user_id: user_id}, %{
+        context: %{
+          current_user: %User{role: role},
+          current_actor: %Actor{} = moderator_actor
+        }
+      })
+      when is_moderator(role) do
+    with %User{disabled: true} = user <- Users.get_user(user_id),
+         {:ok, %User{} = updated_user} <-
+           Users.unban_user(user) do
+      Admin.log_action(moderator_actor, "unsuspend", user)
+      {:ok, updated_user}
+    else
+      %User{disabled: false} ->
+        {:error, dgettext("errors", "User already enabled")}
+    end
+  end
+
+  def unban_account(_parent, _args, _resolution) do
+    {:error, dgettext("errors", "You need to be logged-in and moderator to unban an account")}
+  end
+
   def delete_account(_parent, %{user_id: user_id}, %{
         context: %{
           current_user: %User{role: role},

lib/graphql/schema/user.ex

@@ -467,6 +467,13 @@ defmodule Mobilizon.GraphQL.Schema.UserType do
       resolve(&User.delete_account/3)
     end
 
+    @desc "Unban an account"
+    field :unban_account, :user do
+      arg(:user_id, :id, description: "The user's ID")
+      middleware(Rajska.QueryAuthorization, permit: :moderator, scope: false)
+      resolve(&User.unban_account/3)
+    end
+
     @desc "Set user settings"
     field :set_user_settings, :user_settings do
       arg(:timezone, :timezone, description: "The timezone for this user")

lib/mobilizon/users/users.ex

@@ -170,6 +170,15 @@ defmodule Mobilizon.Users do
 
   @delete_user_default_options [reserve_email: true]
 
+  @spec unban_user(User.t()) :: {:ok, User.t()} | {:error, Ecto.Changeset.t()}
+  def unban_user(%User{} = user) do
+    user
+    |> User.changeset(%{
+      disabled: false
+    })
+    |> Repo.update()
+  end
+
   @doc """
   Deletes an user.