def fetch_posts
    params = OpenStruct.new(params)
    url = params.url
    limit = params.limit
    browser = params.browser

    dlog 'Переходим по адресу: %s'%[url]
    browser.goto url

    Watir::Wait.until{ browser.a(class: "toolbar_logo").present? }

    fetch_time = Time.now

    dlog 'Собираем ссылки на посты...'

    if url =~ /https:\/\/ok.ru\/profile\/\d+\/statuses/
      recieve_posts_urls(limit, posts = :note_posts)
    elsif url =~ /https:\/\/ok.ru\/profile\/\d+/
      recieve_posts_urls(limit, posts = :feed_posts)
    end
  end

  def recieve_posts_urls(limit, posts)
    urls = []
    while limit > posts.count
      posts_before = posts
      scroll_down
      posts_after = posts
      if posts_before.count == posts_after.count
        limit = posts_after.count
      end
    end
    posts_after[0..(limit-1)].each do |post|
      if post.a(class: "media_more_a").exist?
        urls << post.a(class: "media_more_a").href
      elsif post.a(class: "media-text_a").present?
        urls << post.a(class: "media-text_a").href
      end
    end
    return urls
  end



  def scroll_down
    dlog 'Прокручиваем страницу, чтобы отобразилось нужное кол-во постов'
    browser.send_keys :end
    sleep 1 + rand(2)
    if browser.a(class: "link-show-more").present?
      browser.a(class: "link-show-more").click
    end
  end

  def note_posts
    posts = browser.element(class: "media_feed").elements(class: "feed")
  end

  def feed_posts
    posts = browser.element(class: "user-feed").elements(class: "feed-w")
  end