class Pettanr.Sheet extends Peta.Root
  url: '/sheets/'
  
  @singular: () ->
    'Sheet'
  
  @plural: () ->
    'Sheets'
  
  defaults: {
    id: null,
    visible: 0,
    author_id: null
  } 
  
  author: () ->
    new Pettanr.Author({id: @get('author_id')})
  
  is_visible: (operators) ->
    switch super(operators)
      when null
        return true
      when false
        return false
      else
        @get('visible') > 0
  
  initialize: () ->
    if @id
      @url = @url + @id