#-- encoding: UTF-8
#-- 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.
#++

require 'zlib'

class WikiContent < ActiveRecord::Base
  include ActiveModel::ForbiddenAttributesProtection

  belongs_to :page, :class_name => 'WikiPage', :foreign_key => 'page_id'
  belongs_to :author, :class_name => 'User', :foreign_key => 'author_id'
  validates_presence_of :text
  validates_length_of :comments, :maximum => 255, :allow_nil => true

  attr_accessor :comments

  #attr_protected :author_id

  before_save :comments_to_journal_notes

  acts_as_journalized

  acts_as_event type: 'wiki-page',
                title: Proc.new {|o| "#{l(:label_wiki_edit)}: #{o.journal.journable.page.title} (##{o.journal.journable.version})"},
                url: Proc.new {|o| {controller: '/wiki', action: 'show', id: o.journal.journable.page, project_id: o.journal.journable.page.wiki.project, version: o.journal.journable.version}}

  def activity_type
    'wiki_edits'
  end

  def visible?(user=User.current)
    page.visible?(user)
  end

  def project
    page.project
  end

  def attachments
    page.nil? ? [] : page.attachments
  end

  # Returns the mail adresses of users that should be notified
  def recipients
    notified = project.notified_users
    notified.reject! {|user| !visible?(user)}
    notified.collect(&:mail)
  end

  # FIXME: Deprecate
  def versions
    journals
  end

  # REVIEW
  def version
    last_journal.nil? ? 0 : last_journal.version
  end

  private

  def comments_to_journal_notes
    add_journal author, comments
  end

  # FIXME: This is for backwards compatibility only. Remove once we decide it is not needed anymore
#  WikiContentJournal.class_eval do
#    attr_protected :data
#    after_save :compress_version_text
#
#    # Wiki Content might be large and the data should possibly be compressed
#    def compress_version_text
#      self.text = changed_data["text"].last if changed_data["text"]
#      self.text ||= self.journaled.text
#    end
#
#    def text=(plain)
#      case Setting.wiki_compression
#      when "gzip"
#        begin
#          text_hash :text => Zlib::Deflate.deflate(plain, Zlib::BEST_COMPRESSION), :compression => Setting.wiki_compression
#        rescue
#          text_hash :text => plain, :compression => ''
#        end
#      else
#        text_hash :text => plain, :compression => ''
#      end
#      plain
#    end
#
#    def text_hash(hash)
#      changed_data.delete("text")
#      changed_data["data"] = hash[:text]
#      changed_data["compression"] = hash[:compression]
#      update_attribute(:changed_data, changed_data)
#    end
#
#    def text
#      @text ||= case changed_data["compression"]
#      when "gzip"
#         Zlib::Inflate.inflate(changed_data["data"])
#      else
#        # uncompressed data
#        changed_data["data"]
#      end
#    end
#
#    # Returns the previous version or nil
#    def previous
#      @previous ||= journaled.journals.at(version - 1)
#    end
#
#    # FIXME: Deprecate
#    def versioned
#      journaled
#    end
#  end
end