module Locomotive
  class ContentAsset

    include Locomotive::Mongoid::Document

    ## extensions ##
    include Extensions::Asset::Types
    include Extensions::Asset::Vignette

    ## fields ##
    field :content_type,  type: String
    field :width,         type: Integer
    field :height,        type: Integer
    field :size,          type: Integer
    field :position,      type: Integer, default: 0

    ## associations ##
    belongs_to :site, class_name: 'Locomotive::Site'

    ## validations ##
    validates_presence_of :source

    ## behaviours ##
    mount_uploader :source, ContentAssetUploader, mount_on: :source_filename

    ## methods ##

    alias :name :source_filename

    def extname
      return nil unless self.source?
      File.extname(self.source_filename).gsub(/^\./, '')
    end

    def to_liquid
      { url: self.source.url }.merge(self.attributes).stringify_keys
    end

  end
end
