#-- 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.
#++

module Projects
  class InstantiateTemplateContract < CreateContract
    def self.visible_templates(user)
      Project
        .allowed_to(user, :copy_projects)
        .where(templated: true)
    end

    validate :validate_user_allowed_to_instantiate_template

    private

    def validate_user_allowed_to_instantiate_template
      errors.add(:base, :error_unauthorized) unless visible_template?
    end

    def visible_template?
      return false if template_project_id.nil?

      self.class.visible_templates(user).exists?(template_project_id)
    end

    def template_project_id
      options[:template_project_id]
    end
  end
end