class NotImplemented < Exception
end

class Recording
  def render
    raise NotImplemented
  end
end

class YouTubeRecording
  attr_accessor :vid
  def initialize link
    @vid = parse_vid link
  end

  def parse_id link
    /\?v=(.{11})/.match(link)[1]
  end

  # Timecodes in links have to be specified in seconds (the "start" query for
  # embeds doesn't understand "XmYs" like "t" on regular links).
  def parse_timequery link
    match = /&t=([0-9]+)/.match(link)

    match ? "?start=#{match[1]}" : ""
  end

  def parse_vid link
    id = parse_id link
    timequery = parse_timequery link
    "#{id}#{timequery}"
  end

  def render
    template = ERB.new(File.read('templates/youtube.html.erb'), trim_mode: '-')
    template.result binding
  end
end

class BandcampRecording
  attr_accessor :embed
  def initialize _embed
    @embed = _embed
  end

  def render
    @embed
  end
end

class SoundCloudRecording
  attr_accessor :embed
  def initialize _embed
    @embed = _embed
  end

  def render
    @embed
  end
end