#-- encoding: UTF-8

#-- copyright
# OpenProject is an open source project management software.
# Copyright (C) 2012-2020 the OpenProject GmbH
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
# Copyright (C) 2006-2017 Jean-Philippe Lang
# Copyright (C) 2010-2013 the ChiliProject Team
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
#
# See docs/COPYRIGHT.rdoc for more details.
#++

class Users::ProjectRoleCache
  attr_accessor :user

  def initialize(user)
    self.user = user
  end

  def fetch(project)
    cache[project] ||= roles(project)
  end

  private

  def roles(project)
    # No role on archived projects
    return [] unless !project || project&.active?

    # Return all roles if user is admin
    return all_givable_roles if user.admin?

    ::Authorization.roles(user, project).eager_load(:role_permissions)
  end

  def cache
    @cache ||= {}
  end

  def all_givable_roles
    @all_givable_roles ||= Role.givable.to_a
  end
end