#-- encoding: UTF-8
#-- copyright
# OpenProject is a project management system.
# Copyright (C) 2012-2018 the OpenProject Foundation (OPF)
#
# 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 Category < ActiveRecord::Base
  belongs_to :project
  belongs_to :assigned_to, class_name: 'Principal', foreign_key: 'assigned_to_id'
  has_many :work_packages, foreign_key: 'category_id', dependent: :nullify

  validates_presence_of :name
  validates_uniqueness_of :name, scope: [:project_id]
  validates_length_of :name, maximum: 255

  # validates that assignee is member of the issue category's project
  validates_each :assigned_to_id do |record, attr, value|
    if value # allow nil
      record.errors.add(attr, l(:error_must_be_project_member)) unless record.project.principals.map(&:id).include? value
    end
  end

  alias :destroy_without_reassign :destroy

  # Destroy the category
  # If a category is specified, issues are reassigned to this category
  def destroy(reassign_to = nil)
    if reassign_to && reassign_to.is_a?(Category) && reassign_to.project == project
      WorkPackage.where("category_id = #{id}").update_all("category_id = #{reassign_to.id}")
    end
    destroy_without_reassign
  end

  def <=>(category)
    name <=> category.name
  end

  def to_s; name end
end
