#-- encoding: UTF-8
#-- copyright
# OpenProject is a project management system.
#
# Copyright (C) 2012-2013 the OpenProject Team
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# See doc/COPYRIGHT.rdoc for more details.
#++

require 'zlib'

class WikiContent < ActiveRecord::Base
  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 :event_type => 'wiki-page',
    :event_title => Proc.new {|o| "#{l(:label_wiki_edit)}: #{o.journal.journable.page.title} (##{o.journal.journable.version})"},
    :event_url => Proc.new {|o| {:controller => '/wiki', :action => 'show', :id => o.journal.journable.page.title, :project_id => o.journal.journable.page.wiki.project, :version => o.journal.journable.version}},
    :activity_type => 'wiki_edits',
    :activity_permission => :view_wiki_edits,
    :activity_find_options => { :include => { :page => { :wiki => :project } } }

  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
    new_record? || 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