Class: Mosquito::TweetScraper

Inherits:
Scraper
  • Object
show all
Defined in:
lib/mosquito/scrapers/tweet_scraper.rb

Instance Method Summary collapse

Methods inherited from Scraper

#get_content_of_page_from_url_curl, #get_content_of_subpage_from_url, #initialize

Constructor Details

This class inherits a constructor from Mosquito::Scraper

Instance Method Details

#parse(id) ⇒ Object 



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# File 'lib/mosquito/scrapers/tweet_scraper.rb', line 10

def parse(id)
  # Stuff we need to get from the DOM (implemented is starred):
  # - User
  # - Text *
  # - Image  / Images  / Video *
  # - Date *
  # - Number of likes *
  # - Hashtags

  Capybara.app_host = ENV["NITTER_URL"]

  # video slideshows https://www.instagram.com/p/CY7KxwYOFBS/?utm_source=ig_embed&utm_campaign=loading
  # login
  begin
    doc = Nokogiri::HTML(URI.open("#{ENV["NITTER_URL"]}/jack/status/#{id}"))
  rescue OpenURI::HTTPError
    raise Mosquito::NoTweetFoundError
  end

  unless doc.xpath("//div[contains(@class, 'error-panel')]").empty?
    raise Mosquito::NoTweetFoundError
  end

  text = doc.xpath("//div[contains(@class, 'tweet-content media-body')]").first.content
  date = DateTime.parse(doc.xpath("//span[contains(@class, 'tweet-date')]").first.child["title"])
  id = URI.parse(doc.xpath("//link[contains(@rel, 'canonical')]").first["href"]).path.split("/").last
  number_of_likes = doc.xpath("//span[contains(@class, 'tweet-stat')][last()]/div").first.content.delete(",").to_i
  language = "en" # We can't determine this anymore with Nitter, but english will be fine, we don't actually use this anywhere... i think
  # user

  images = []
  videos = []
  video_preview_image = nil
  video_file_type = nil

  # # Single image
  # image_url = doc.xpath("//div[contains(@class, 'main-tweet')]/div/div/div/div/div/a[contains(@class, 'still-image')]/@href").first&.content
  # images << Mosquito.retrieve_media("#{Capybara.app_host}#{image_url}") unless image_url.nil?

  # debugger

  # Slideshow
  nodes = doc.xpath("//div[contains(@class, 'main-tweet')]/div/div/div[contains(@class, 'attachments')]/div[contains(@class, 'gallery-row')]/div/a/@href")
  images.concat(nodes.map { |node| Mosquito.retrieve_media("#{Capybara.app_host}#{node.value}") })

  # Video
  nodes = doc.xpath("//div[contains(@class, 'main-tweet')]/div/div/div[contains(@class, 'attachments')]/div[contains(@class, 'gallery-video')]/div/video")
  unless nodes.empty?
    video_preview_image = Mosquito.retrieve_media("#{Capybara.app_host}#{nodes.first["poster"]}", extension: ".jpg")
    videos.concat(nodes.map { |node| Mosquito.retrieve_media(node.xpath("//source").first["src"]) })
    video_file_type = "video" # This is always video now, sing a gif isn't displayed differently
  end

  # GIF
  nodes = doc.xpath("//div[contains(@class, 'main-tweet')]/div/div/div[contains(@class, 'attachments')]/div[contains(@class, 'gallery-gif')]/div/video")
  unless nodes.empty?
    video_preview_image = Mosquito.retrieve_media(nodes.first["poster"], extension: ".jpg")
    videos.concat(nodes.map { |node| Mosquito.retrieve_media("#{Capybara.app_host}#{node.xpath("//source[1]/source/@src").first&.content}") })
    video_file_type = "gif"
  end

  username = doc.xpath("//a[contains(@class, 'username')][1]/@href").first.value
  user = UserScraper.new.parse(username)

  screenshot_file = take_screenshot()

  {
    images: images,
    video: videos,
    video_preview_image: video_preview_image,
    screenshot_file: screenshot_file,
    text: text,
    date: date,
    number_of_likes: number_of_likes,
    user: user,
    id: id,
    language: language,
    video_file_type: video_file_type
  }
end

#take_screenshot ⇒ Object 



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# File 'lib/mosquito/scrapers/tweet_scraper.rb', line 91

def take_screenshot
  # First check if a post has a fact check overlay, if so, clear it.
  # The only issue is that this can take *awhile* to search. Not sure what to do about that
  # since it's Instagram's fault for having such a fucked up obfuscated hierarchy      # Take the screenshot and return it
  save_screenshot("#{Mosquito.temp_storage_location}/instagram_screenshot_#{SecureRandom.uuid}.png")
end