class MeetingContent < ActiveRecord::Base
  unloadable
  
  belongs_to :meeting
  belongs_to :author, :class_name => 'User', :foreign_key => 'author_id'
  
  attr_accessor :comment
  
  before_save :comment_to_journal_notes
  
  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.find_version(version_to)
    content_from = self.find_version(version_from)
    
    (content_to && content_from) ? WikiDiff.new(content_to, content_from) : nil
  end
  
  # Compatibility for mailer.rb
  def updated_on
    updated_at
  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
    init_journal(author, comment) unless changes.empty?
  end
  
  # FIXME: Leftover from pre-journalized meeting contents
  #class Version
  #  unloadable
  #  
  #  belongs_to :author, :class_name => '::User', :foreign_key => 'author_id'
  #  belongs_to :meeting, :class_name => '::Meeting', :foreign_key => 'meeting_id'
  #  
  #  acts_as_event :title => Proc.new {|o| "#{l :"label_#{o.versioned_type.underscore}"}: #{o.meeting.title}"},
  #                :description => :comment,
  #                :datetime => :updated_at,
  #                :type => Proc.new {|o| o.versioned_type.underscore.dasherize},
  #                :url => Proc.new {|o| {:controller => 'meetings', :action => 'show', :id => o.meeting}}
  #  
  #  acts_as_activity_provider :type => 'meetings',
  #                            :timestamp => "#{MeetingContent.versioned_table_name}.updated_at",
  #                            :author_key => "#{MeetingContent.versioned_table_name}.author_id",
  #                            :permission => :view_meetings,
  #                            :find_options => {:select => "#{MeetingContent.versioned_table_name}.updated_at, #{MeetingContent.versioned_table_name}.comment, " +
  #                                                         "#{MeetingContent.versioned_table_name}.#{MeetingContent.version_column}, #{Meeting.table_name}.title, " +
  #                                                         "#{MeetingContent.versioned_table_name}.author_id, #{MeetingContent.versioned_table_name}.id," +
  #                                                         "#{MeetingContent.versioned_table_name}.meeting_id, #{Meeting.table_name}.project_id, " +
  #                                                         "#{MeetingContent.versioned_table_name}.versioned_type",
  #                                              :joins => "LEFT JOIN #{Meeting.table_name} ON #{Meeting.table_name}.id = #{MeetingContent.versioned_table_name}.meeting_id " +
  #                                                        "LEFT JOIN #{Project.table_name} ON #{Project.table_name}.id = #{Meeting.table_name}.project_id"}
  #  
  #  def project
  #    meeting.project
  #  end
  #  
  #  def editable?
  #    false
  #  end
  #end
end