btrc-hub/backend/app/services/post_importer.rb

class PostImporter
  def initialize provider:
    @provider = provider
  end

  def import_posts source_videos
    alive_codes = []

    ApplicationRecord.transaction do
      source_videos.each do |source_video|
        alive_codes << source_video.fetch(:code)

        deerjikist_tag = deerjikist_tag_of(source_video)
        video = upsert_post(source_video, deerjikist_tag)
      end
    end
  end

  private

  attr_reader :provider

  def deerjikist_tag_of source_video
    user_code = source_video[:user_code]
    return nil if user_code.blank?

    deerjikist&.tag
  end

  def upsert_post source_video, deerjikist_tag
    url =
        case provider
        when 'youtube'
          "https://youtube.com/watch/#{ source_video.fetch(:code) }"
        end
    raise 'ちんぽ!' if url.blank?

    Post.find_or_initialize_by(url:).tap do |post|
      post.title = source_viedo.fetch(:title)
      post.uploaded_user_id = nil
      post.original_created_from = source_video.fetch(:uploaded_at)
      post.original_created_before = post.original_created_from + 1.min
      post.tags << (deerjikist_tag || no_deerjikist)
      post.tags << Tag.youtube
      post.tags << Tag.video
      post.tags << Tag.bot
      post.tags << Tag.tagme
      post.save!
    end
  end
end