#-- copyright
# OpenProject is a project management system.
# Copyright (C) 2012-2013 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) 2006-2013 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 doc/COPYRIGHT.rdoc for more details.
#++

class RemoveDocuments < ActiveRecord::Migration
  def up
    unless Redmine::Plugin.registered_plugins.include?(:openproject_documents)
      if  Document.any? || Attachment.where(:container_type => ['Document']).any?
        raise "There are still documents and/or attachments attached to documents, please remove them."
      else
        drop_table :documents
        DocumentCategory.destroy_all
        Attachment.where(:container_type => ['Document']).destroy_all
      end
    end
  end

  def down
    unless ActiveRecord::Base.connection.table_exists? 'Documents'
      create_table "documents", :force => true do |t|
        t.integer  "project_id",                :default => 0,  :null => false
        t.integer  "category_id",               :default => 0,  :null => false
        t.string   "title",       :limit => 60, :default => "", :null => false
        t.text     "description"
        t.datetime "created_on"
      end
      add_index "documents", ["category_id"], :name => "index_documents_on_category_id"
      add_index "documents", ["created_on"], :name => "index_documents_on_created_on"
      add_index "documents", ["project_id"], :name => "documents_project_id"
    end
  end
end

class Document < ActiveRecord::Base
  belongs_to :project
  belongs_to :category, :class_name => "DocumentCategory", :foreign_key => "category_id"
end

class DocumentCategory < Enumeration
  has_many :documents, :foreign_key => 'category_id'
end