marceloboeira/feedcast

class Episode
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Uuid
  include Mongoid::Slug

  PUBLISHING_IN_ADVANCE_INTERVAL = 12.hours

  field :title, type: String
  field :summary, type: String
  field :description, type: String
  field :published_at, type: DateTime
  field :indexed_at, type: DateTime

  slug :title, scope: :channel

  validates :title, presence: true
  validates :audio, presence: true
  validates :published_at, presence: true, date: { before: Proc.new{ PUBLISHING_IN_ADVANCE_INTERVAL.from_now } }

  belongs_to :channel
  embeds_one :audio
  accepts_nested_attributes_for :audio
  has_many :episode_listens, dependent: :destroy

  index({ published_at: 1, channel_id: 1 }, unique: true)

  scope :not_analysed, -> do
    where(:"audio.status".ne => Audio::ANALYSED)
     .and(:"audio.error_count".lt => Audio::MAX_ERROR_COUNT)
  end

  def self.find_for(channel_slug, episode_slug)
    Episode.find_by(_slugs: episode_slug, channel_id: Channel.find(channel_slug).id)
  end
end