youtube-video-list

require 'google/api_client'

module Youtube
  class VideoList

    YOUTUBE_API_SERVICE_NAME = 'youtube'
    YOUTUBE_API_VERSION = 'v3'
    YOUTUBE_ID_REGEX = /^(https?:\/\/(?:youtu.be\/|www.youtube.com\/(?:watch\?v=|embed\/))(?<youtube_id>[\w\-]{4,16})\??([\w\-\=]+)?)$/


    attr_accessor :video_id, :description, :title, :url

    def initialize(video_url)
      @url = video_url

      extract_youtube_id
      set_youtube_data
    end

    def client
      Google::APIClient.new(
        key: settings.api_key,
        authorization: nil,
        application_name: settings.application_name
        )
    end

    def youtube
      client.discovered_api(YOUTUBE_API_SERVICE_NAME, YOUTUBE_API_VERSION )
    end

    def search_response
      client.execute!(
        api_method: youtube.search.list,
        parameters: {
          part: 'snippet',
          q: video_id
        }
      )
    end

    def set_youtube_data
      data = search_response.data.items.first
      return if data.blank?

      @description = data["description"]
      @title = data["title"]
    end


    private

    def settings
      Figleaf::Settings.youtube
    end

    def extract_youtube_id
       @url.match(YOUTUBE_ID_REGEX) do |m|
         self.video_id = m[:youtube_id]
       end
    end
  end
end