#-- copyright
# OpenProject is a project management system.
#
# Copyright (C) 2011-2013 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.
#++

class MeetingContent < ActiveRecord::Base

  belongs_to :meeting
  belongs_to :author, :class_name => 'User', :foreign_key => 'author_id'

  attr_accessor :comment

  validates_length_of :comment, :maximum => 255, :allow_nil => true

  attr_accessible :text, :lock_version, :comment

  before_save :comment_to_journal_notes

  acts_as_journalized :activity_type => 'meetings',
    :activity_permission => :view_meetings,
    :activity_find_options => {:include => {:meeting => :project}},
    :event_title => Proc.new {|o| "#{o.journal.journable.class.model_name.human}: #{o.journal.journable.meeting.title}"},
    :event_url => Proc.new {|o| {:controller => '/meetings', :action => 'show', :id => o.journal.journable.meeting}}

  User.before_destroy do |user|
    MeetingContent.update_all ['author_id = ?', DeletedUser.first], ['author_id = ?', user.id]
  end

  def activity_type
    'meetings'
  end

  def editable?
    true
  end

  def diff(version_to=nil, version_from=nil)
    version_to = version_to ? version_to.to_i : self.version
    version_from = version_from ? version_from.to_i : version_to - 1
    version_to, version_from = version_from, version_to unless version_from < version_to

    content_to = self.journals.find_by_version(version_to)
    content_from = self.journals.find_by_version(version_from)

    (content_to && content_from) ? WikiPage::WikiDiff.new(content_to, content_from) : nil
  end

  def at_version(version)
    # TODO: instead of retrieving all versions and filtering them, we should just select the single version
    # from the db - as a start, something using find_by_version could be used
    versions = journals.select {|journal| journal.journable.type == self.class.to_s }
    versions[version.to_i - 1].data
  end

  # Compatibility for mailer.rb
  def updated_on
    updated_at
  end

  # Show the project on activity and search views
  def project
    meeting.project
  end

  # Provided for compatibility of the old pre-journalized migration
  def self.create_versioned_table
  end

  # Provided for compatibility of the old pre-journalized migration
  def self.drop_versioned_table
  end

  private

  def comment_to_journal_notes
    add_journal(author, comment) unless changes.empty?
  end
end