Class: Forki::PostScraper

Inherits:
Scraper
  • Object
show all
Defined in:
lib/forki/scrapers/post_scraper.rb

Overview

rubocop:disable Metrics/ClassLength

Instance Method Summary collapse

Methods inherited from Scraper

#download_image, #find_graphql_data_closure_index, #find_graphql_data_strings, #initialize

Constructor Details

This class inherits a constructor from Forki::Scraper

Instance Method Details

#check_if_post_is_image(graphql_objects) ⇒ Object 



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# File 'lib/forki/scrapers/post_scraper.rb', line 93

def check_if_post_is_image(graphql_objects)
  graphql_objects.any? do |graphql_object|  # if any GraphQL objects contain the top-level keys above, return true
    return true unless graphql_object.fetch("image", nil).nil? # so long as the associated values are not nil
    return true unless graphql_object.fetch("currMedia", nil).nil?
    return true unless graphql_object.fetch("photo_image", nil).nil?
    return true unless graphql_object.fetch("large_share_image", nil).nil?

    # This is a complicated form for `web.facebook.com` posts
    if !graphql_object.dig("node", "comet_sections", "content", "story", "attachments").nil?
      if graphql_object["node"]["comet_sections"]["content"]["story"]["attachments"].count.positive?
        return true unless graphql_object["node"]["comet_sections"]["content"]["story"]["attachments"].first.dig("styles", "attachment", "all_subattachments", "nodes")&.first&.dig("media", "image", "uri").nil?

        # Another version I guess
        return true unless graphql_object["node"]["comet_sections"]["content"]["story"]["attachments"].first.dig("styles", "attachment", "media", "large_share_image")&.dig("uri").nil?
      end
    end

    # Another weird format
    begin
      if !graphql_object["node"]["comet_sections"]["content"]["story"]["attachments"].empty?
        return true unless graphql_object["node"]["comet_sections"]["content"]["story"]["attachments"].first.dig("styles", "attachment", "media", "photo_image", "uri").nil?
      end
    rescue StandardError

    end
  end
end

#check_if_post_is_in_comment_stream(graphql_objects) ⇒ Object 



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# File 'lib/forki/scrapers/post_scraper.rb', line 121

def check_if_post_is_in_comment_stream(graphql_objects)
  graphql_objects.find do |graphql_object|
    next unless graphql_object.key?("nodes")

    begin
      type = graphql_object["nodes"].first["comet_sections"]["content"]["story"]["attachments"].first["styles"]["attachment"]["media"]["__typename"]
    rescue StandardError
      # if there's an error just return false, since the structure is so specific checking the whole thing is a lot
      next
    end

    return true if type == "Video"
  end

  false
end

#check_if_post_is_reel(graphql_object) ⇒ Object 



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# File 'lib/forki/scrapers/post_scraper.rb', line 81

def check_if_post_is_reel(graphql_object)
  return false unless graphql_object.key?("node")

  begin
    style_infos = graphql_object["node"]["comet_sections"]["content"]["story"]["attachments"].first["styles"]["attachment"]["style_infos"].first
  rescue NoMethodError # if the object doesn't match the attribute chain above, the line above will try to operate on nil
    return false
  end

  style_infos.include?("fb_shorts_story")
end

#check_if_post_is_text_only(graphql_objects) ⇒ Object 



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# File 'lib/forki/scrapers/post_scraper.rb', line 51

def check_if_post_is_text_only(graphql_objects)
  graphql_object = graphql_objects.find do |graphql_object|
    # next unless graphql_object.key?("nodes")
    next if graphql_object.dig("node", "comet_sections", "content", "story", "comet_sections", "message", "story", "is_text_only_story").nil?
    # next unless graphql_object.to_s.include?("is_text_only_story")
    # graphql_nodes = graphql_object["nodes"]
    graphql_object.dig("node", "comet_sections", "content", "story", "comet_sections", "message", "story", "is_text_only_story")
  end

  return false if graphql_object.nil?

  return true if graphql_object.dig("node", "comet_sections", "content", "story", "comet_sections", "message", "story", "is_text_only_story")
  false
end

#check_if_post_is_video(graphql_objects) ⇒ Object 



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# File 'lib/forki/scrapers/post_scraper.rb', line 66

def check_if_post_is_video(graphql_objects)
  result = graphql_objects.find do |graphql_object|
    next unless graphql_object.dig("viewer", "news_feed").nil? # The new page loads the news feed *and* the post
    next unless graphql_object.dig("node", "sponsored_data").nil? # Ads sneak in too but don't mark as feed

    result = graphql_object.to_s.include?("videoDeliveryLegacyFields")
    result = graphql_object.key?("is_live_streaming") && graphql_object["is_live_streaming"] == true if result == false
    result = graphql_object.key?("video") if result == false
    result = check_if_post_is_reel(graphql_object) if result == false
    result
  end

  !result.nil?
end

#extract_image_post_data(graphql_object_array) ⇒ Object

Extracts data from an image post by parsing GraphQL strings as seen in the video post scraper above



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# File 'lib/forki/scrapers/post_scraper.rb', line 419

def extract_image_post_data(graphql_object_array)
  # This is a weird one-off style
  graphql_object = graphql_object_array.find { |graphql_object| !graphql_object.dig("node", "comet_sections", "content", "story", "attachments").nil? }
  unless graphql_object.nil? || graphql_object.count.zero?
    # TODO: These two branches are *super* similar, probably a lot of overlap
    attachments = graphql_object["node"]["comet_sections"]["content"]["story"]["attachments"]

    if graphql_object["node"]["comet_sections"]["feedback"]["story"].has_key?("story_ufi_container")
      feedback_object = graphql_object["node"]["comet_sections"]["feedback"]["story"]["story_ufi_container"]["story"]["feedback_context"]["feedback_target_with_context"]["comet_ufi_summary_and_actions_renderer"]["feedback"]
    elsif graphql_object["node"]["comet_sections"]["feedback"]["story"].dig("feedback_context")
      begin
        feedback_object = graphql_object["node"]["comet_sections"]["feedback"]["story"]["feedback_context"]["feedback_target_with_context"]["ufi_renderer"]["feedback"]["comet_ufi_summary_and_actions_renderer"]["feedback"]
      rescue NoMethodError; end
    elsif graphql_object["node"]["comet_sections"]["feedback"]["story"].has_key?("comet_feed_ufi_container")
      feedback_object = graphql_object["node"]["comet_sections"]["feedback"]["story"]["comet_feed_ufi_container"]["story"]["story_ufi_container"]["story"]["feedback_context"]["feedback_target_with_context"]["comet_ufi_summary_and_actions_renderer"]["feedback"]
    else
      feedback_object = graphql_object["node"]["comet_sections"]["feedback"]["story"]["feedback_context"]["feedback_target_with_context"]["ufi_renderer"]["feedback"]["comet_ufi_summary_and_actions_renderer"]["feedback"]
    end

    if feedback_object.has_key?("cannot_see_top_custom_reactions")
      reaction_counts = extract_reaction_counts(feedback_object["cannot_see_top_custom_reactions"]["top_reactions"])
    else
      reaction_counts = extract_reaction_counts(feedback_object["top_reactions"])
    end

    id = graphql_object["node"]["post_id"]
    num_comments = feedback_object["comments_count_summary_renderer"]["feedback"]["comment_rendering_instance"]["comments"]["total_count"]
    reshare_warning = feedback_object["should_show_reshare_warning"]

    if attachments.count.positive? && attachments.first["styles"]["attachment"]&.key?("all_subattachments")
      image_url = attachments.first["styles"]["attachment"]["all_subattachments"]["nodes"].first["media"]["image"]["uri"]
    else
      image_url = attachments.first&.dig("styles", "attachment", "media", "photo_image", "uri")

      if image_url.nil?
        image_url = attachments.first&.dig("styles", "attachment", "media", "large_share_image", "uri")
      end

      if image_url.nil?
        image_url = attachments.first&.dig("styles", "attachment", "media", "image", "uri")
      end
    end

    text = graphql_object["node"]["comet_sections"]["content"]["story"].dig("message", "text")
    text = "" if text.nil?

    profile_link = graphql_object["node"]["comet_sections"]["content"]["story"]["actors"].first["url"]

    unless graphql_object["node"]["comet_sections"].dig("content", "story", "comet_sections", "context_layout", "story", "comet_sections", "metadata").nil?
      created_at = graphql_object["node"]["comet_sections"].dig("content", "story", "comet_sections", "context_layout", "story", "comet_sections", "metadata")&.first["story"]["creation_time"]
    else
      created_at = graphql_object["node"]["comet_sections"]["context_layout"]["story"]["comet_sections"]["metadata"].first["story"]["creation_time"]
    end

    has_video = false
  else
    graphql_object_array.find { |graphql_object| graphql_object.key?("viewer_actor") && graphql_object.key?("display_comments") }
    curr_media_object = graphql_object_array.find { |graphql_object| graphql_object.key?("currMedia") }
    raise Forki::ContentUnavailableError if curr_media_object.nil?

    creation_story_object = graphql_object_array.find { |graphql_object| graphql_object.key?("creation_story") && graphql_object.key?("message") }

    feedback_object = graphql_object_array.find { |graphql_object| graphql_object.has_key?("comet_ufi_summary_and_actions_renderer") }["comet_ufi_summary_and_actions_renderer"]["feedback"]

    if feedback_object.key?("top_reactions")
      feedback_object = feedback_object
    else
      # POSSIBLY OUT OF DATE
      feedback_object = feedback_object["comet_ufi_summary_and_actions_renderer"]["feedback"]
    end

    share_count_object = feedback_object.fetch("share_count", {})

    poster = creation_story_object["creation_story"]["comet_sections"]["actor_photo"]["story"]["actors"][0]

    if feedback_object.has_key?("cannot_see_top_custom_reactions")
      reaction_counts = extract_reaction_counts(feedback_object["cannot_see_top_custom_reactions"]["top_reactions"])
    else
      reaction_counts = extract_reaction_counts(feedback_object["top_reactions"])
    end

    id = curr_media_object["currMedia"]["id"],

    num_comments = feedback_object["comments_count_summary_renderer"]["feedback"]["total_comment_count"],
    if num_comments.nil? && feedback_object.has_key?("comments_count_summary_renderer")
      num_comments = feedback_object["comments_count_summary_renderer"]["feedback"]["comment_rendering_instance"]["comments"]["total_count"]
    end

    num_shares = share_count_object.fetch("count", nil)
    reshare_warning = feedback_object["should_show_reshare_warning"]
    image_url = curr_media_object["currMedia"]["image"]["uri"]
    text = (creation_story_object["message"] || {}).fetch("text", nil)
    profile_link = poster["url"]
    created_at = curr_media_object["currMedia"]["created_time"]
    has_video = false
  end

  post_details = {
    id: id,
    num_comments: num_comments,
    num_shares: num_shares,
    reshare_warning: reshare_warning,
    image_url: image_url,
    text: text,
    profile_link: profile_link,
    created_at: created_at,
    has_video: has_video
  }
  post_details[:image_file] = Forki.retrieve_media(post_details[:image_url])
  post_details[:reactions] = reaction_counts
  post_details
end

#extract_live_video_post_data_from_watch_page(graphql_strings) ⇒ Object

Extract data from live video post on the watch page



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# File 'lib/forki/scrapers/post_scraper.rb', line 568

def extract_live_video_post_data_from_watch_page(graphql_strings)
  creation_story_object = JSON.parse(graphql_strings.find { |graphql| (graphql.include? "comment_count") && \
                                                   (graphql.include? "creation_story") })["video"]["creation_story"]
  media_object = JSON.parse(graphql_strings.find { |graphql| graphql.include? "playable_url" })["video"]["creation_story"]["attachments"][0]["media"]
  video_permalink = creation_story_object["shareable"]["url"].delete("\\")
  if creation_story_object["feedback_context"]["feedback_target_with_context"].key?("cannot_see_top_custom_reactions")
    reaction_counts = extract_reaction_counts(creation_story_object["feedback_context"]["feedback_target_with_context"]["cannot_see_top_custom_reactions"]["top_reactions"])
  else
    reaction_counts = extract_reaction_counts(creation_story_object["feedback_context"]["feedback_target_with_context"]["top_reactions"])
  end

  post_details = {
    id: creation_story_object["shareable"]["id"],
    num_comments: creation_story_object["feedback_context"]["feedback_target_with_context"]["total_comment_count"],
    num_shares: nil,
    num_views: find_number_of_views, # as far as I can tell, this is never present for live videos
    reshare_warning: creation_story_object["feedback_context"]["feedback_target_with_context"]["should_show_reshare_warning"],
    video_preview_image_url: creation_story_object["attachments"][0]["media"]["preferred_thumbnail"]["image"]["uri"],
    video_url: (media_object.fetch("playable_url_quality_hd", nil) || media_object.fetch("playable_url", nil)).delete("\\"),
    text: creation_story_object["attachments"][0]["media"]["savable_description"]["text"],
    created_at: creation_story_object["attachments"][0]["media"]["publish_time"],
    profile_link: video_permalink[..video_permalink.index("/videos")],
    has_video: true
  }

  post_details[:video_preview_image_file] = Forki.retrieve_media(post_details[:video_preview_image_url])
  post_details[:video_file] = Forki.retrieve_media(post_details[:video_url])
  post_details[:reactions] = reaction_counts
  post_details
end

#extract_post_data(graphql_strings) ⇒ Object

Raises:



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# File 'lib/forki/scrapers/post_scraper.rb', line 21

def extract_post_data(graphql_strings)
  # Bail out of the post otherwise it gets stuck
  raise ContentUnavailableError unless is_post_available?

  graphql_objects = get_graphql_objects(graphql_strings)
  post_is_text_only = check_if_post_is_text_only(graphql_objects)
  post_has_video = check_if_post_is_video(graphql_objects)
  post_has_image = check_if_post_is_image(graphql_objects)

  # There's a chance it may be embedded in a comment chain like this:
  # https://www.facebook.com/PlandemicMovie/posts/588866298398729/
  post_has_video_in_comment_stream = check_if_post_is_in_comment_stream(graphql_objects) if post_has_video == false

  if post_is_text_only
    extract_text_post_data(graphql_objects)
  elsif post_has_image && !post_has_video && !post_has_video_in_comment_stream
    extract_image_post_data(graphql_objects)
  elsif post_has_video
    extract_video_post_data(graphql_strings)
  elsif post_has_video_in_comment_stream
    extract_video_comment_post_data(graphql_objects)
  else
    extract_image_post_data(graphql_objects)
  end
end

#extract_reaction_counts(reactions_object) ⇒ Object

Returns a hash containing counts of each reaction to a post Takes the edges list and creates a dictionary for each element that looks like: 1234 Then merges the dictionaries with the inject call



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# File 'lib/forki/scrapers/post_scraper.rb', line 602

def extract_reaction_counts(reactions_object)
  reactions_object["edges"].map do |reaction|
    {
      "num_#{reaction["node"]["localized_name"].downcase}s".to_sym => reaction["reaction_count"]
    }
  end.inject { |emoji_counts, count| emoji_counts.merge(count) }
end

#extract_text_post_data(graphql_objects) ⇒ Object 



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# File 'lib/forki/scrapers/post_scraper.rb', line 157

def extract_text_post_data(graphql_objects)
  graphql_object = graphql_objects.find do |graphql_object|
    next if graphql_object.dig("node", "comet_sections", "content", "story", "comet_sections", "message", "story", "is_text_only_story").nil?
    graphql_object
  end

  unless graphql_object.nil? || graphql_object.count.zero?
    if graphql_object["node"]["comet_sections"]["feedback"]["story"].has_key?("story_ufi_container")
      feedback_object = graphql_object["node"]["comet_sections"]["feedback"]["story"]["story_ufi_container"]["story"]["feedback_context"]["feedback_target_with_context"]["comet_ufi_summary_and_actions_renderer"]["feedback"]
    elsif graphql_object["node"]["comet_sections"]["feedback"]["story"].dig("feedback_context")
      begin
        feedback_object = graphql_object["node"]["comet_sections"]["feedback"]["story"]["feedback_context"]["feedback_target_with_context"]["ufi_renderer"]["feedback"]["comet_ufi_summary_and_actions_renderer"]["feedback"]
      rescue NoMethodError; end
    elsif graphql_object["node"]["comet_sections"]["feedback"]["story"].has_key?("comet_feed_ufi_container")
      feedback_object = graphql_object["node"]["comet_sections"]["feedback"]["story"]["comet_feed_ufi_container"]["story"]["story_ufi_container"]["story"]["feedback_context"]["feedback_target_with_context"]["comet_ufi_summary_and_actions_renderer"]["feedback"]
    else
      feedback_object = graphql_object["node"]["comet_sections"]["feedback"]["story"]["feedback_context"]["feedback_target_with_context"]["ufi_renderer"]["feedback"]["comet_ufi_summary_and_actions_renderer"]["feedback"]
    end

    if feedback_object.has_key?("cannot_see_top_custom_reactions")
      reaction_counts = extract_reaction_counts(feedback_object["cannot_see_top_custom_reactions"]["top_reactions"])
    else
      reaction_counts = extract_reaction_counts(feedback_object["top_reactions"])
    end

    id = graphql_object["node"]["post_id"]
    num_comments = feedback_object["comments_count_summary_renderer"]["feedback"]["comment_rendering_instance"]["comments"]["total_count"]
    reshare_warning = feedback_object["should_show_reshare_warning"]
    share_count_object = feedback_object.fetch("share_count", {})
    num_shares = share_count_object.fetch("count", nil)

    text = graphql_object["node"]["comet_sections"]["content"]["story"].dig("message", "text")
    text = "" if text.nil?

    profile_link = graphql_object["node"]["comet_sections"]["content"]["story"]["actors"].first["url"]

    unless graphql_object["node"]["comet_sections"].dig("content", "story", "comet_sections", "context_layout", "story", "comet_sections", "metadata").nil?
      created_at = graphql_object["node"]["comet_sections"].dig("content", "story", "comet_sections", "context_layout", "story", "comet_sections", "metadata")&.first["story"]["creation_time"]
    else
      created_at = graphql_object["node"]["comet_sections"]["context_layout"]["story"]["comet_sections"]["metadata"].first["story"]["creation_time"]
    end

    has_video = false
  end

  post_details = {
    id: id,
    num_comments: num_comments,
    num_shares: num_shares,
    reshare_warning: reshare_warning,
    image_url: nil,
    text: text,
    profile_link: profile_link,
    created_at: created_at,
    has_video: has_video
  }
  post_details[:image_file] = []
  post_details[:reactions] = reaction_counts
  post_details
end

#extract_video_comment_post_data(graphql_objects) ⇒ Object 



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# File 'lib/forki/scrapers/post_scraper.rb', line 218

def extract_video_comment_post_data(graphql_objects)
  graphql_nodes = nil
  graphql_objects.find do |graphql_object|
    next unless graphql_object.key?("nodes")
    graphql_nodes = graphql_object["nodes"]

    break
  end

  media = graphql_nodes.first["comet_sections"]["content"]["story"]["attachments"].first["styles"]["attachment"]["media"]
  inital_feedback_object = graphql_nodes.first["comet_sections"]["feedback"]["story"]["feedback_context"]["feedback_target_with_context"]["ufi_renderer"]["feedback"]
  feedback_object = inital_feedback_object["comet_ufi_summary_and_actions_renderer"]["feedback"]

  post_details = {
    id: media["id"],
    num_comments: feedback_object["comment_count"]["total_count"],
    num_shares: feedback_object["share_count"]["count"],
    num_views: feedback_object["video_view_count"],
    reshare_warning: feedback_object["should_show_reshare_warning"],
    video_preview_image_url: media["preferred_thumbnail"]["image"]["uri"],
    video_url: media["playable_url_quality_hd"] || media["playable_url"],
    text: graphql_nodes.first["comet_sections"]["content"]["story"]["comet_sections"]["message"]["story"]["message"]["text"],
    created_at: media["publish_time"],
    profile_link: graphql_nodes.first["comet_sections"]["context_layout"]["story"]["comet_sections"]["actor_photo"]["story"]["actors"].first["url"],
    has_video: true
  }

  post_details[:video_preview_image_file] = Forki.retrieve_media(post_details[:video_preview_image_url])
  post_details[:video_file] = Forki.retrieve_media(post_details[:video_url])
  post_details[:reactions] = inital_feedback_object["comet_ufi_summary_and_actions_renderer"]["feedback"]["i18n_reaction_count"]
  post_details
end

#extract_video_post_data(graphql_strings) ⇒ Object

Unfortunately, there’s a taxonomy of video post types, all of which require different parsing methods Specifically, there are normal video posts, video posts from the watch page, and live video posts from the watch page The general strategy for extracting information from each type, though, is to find which of the 30-odd GraphQL strings are relevant After finding those GraphQL strings, we parse them into hashes and extract the information we need



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# File 'lib/forki/scrapers/post_scraper.rb', line 255

def extract_video_post_data(graphql_strings)
  unless all("h1").find { |h1| h1.text.strip == "Watch" }.nil?
    return extract_video_post_data_from_watch_page(graphql_strings)  # If this is a "watch page" video
  end

  graphql_object_array = graphql_strings.map { |graphql_string| JSON.parse(graphql_string) }

  # Once in awhile it's really easy
  video_objects = graphql_object_array.filter { |go| go.has_key?("video") }

  if VideoSieve.can_process_with_sieve?(graphql_object_array)
    # Eventually all of this complexity will be replaced with this
    return VideoSieve.sieve_for_graphql_objects(graphql_object_array)
  end

  story_node_object = graphql_object_array.find { |graphql_object| graphql_object.key? "node" }&.fetch("node", nil) # user posted video
  story_node_object = story_node_object || graphql_object_array.find { |graphql_object| graphql_object.key? "nodes" }&.fetch("nodes")&.first # page posted video

  return extract_video_post_data_alternative(graphql_object_array) if story_node_object.nil?

  if story_node_object["comet_sections"]["content"]["story"]["attachments"].first["styles"]["attachment"].key?("media")
    media_object = story_node_object["comet_sections"]["content"]["story"]["attachments"].first["styles"]["attachment"]
    if media_object.has_key?("video")
      video_object = story_node_object["comet_sections"]["content"]["story"]["attachments"].first["styles"]["attachment"]["media"]["video"]
    elsif media_object.has_key?("media") && (media_object["media"].has_key?("browser_native_sd_url") || media_object["media"].has_key?("videoDeliveryLegacyFields"))
      video_object = media_object["media"]
    end

    creation_date = video_object["publish_time"] if video_object&.has_key?("publish_time")
    creation_date = story_node_object["comet_sections"]["content"]["story"]["attachments"].first["styles"]["attachment"]["media"]["publish_time"] if creation_date.nil?
  elsif story_node_object["comet_sections"]["content"]["story"]["attachments"].first["styles"]["attachment"].key?("style_infos")
    # For "Reels" we need a separate way to parse this
    video_object = story_node_object["comet_sections"]["content"]["story"]["attachments"].first["styles"]["attachment"]["style_infos"].first["fb_shorts_story"]["short_form_video_context"]["playback_video"]
    creation_date = story_node_object["comet_sections"]["content"]["story"]["attachments"].first["styles"]["attachment"]["style_infos"].first["fb_shorts_story"]["creation_time"]
  else
    raise "Unable to parse video object" if video_objects.empty?
  end

  begin
    feedback_object = story_node_object["comet_sections"]["feedback"]["story"]["feedback_context"]["feedback_target_with_context"]["ufi_renderer"]["feedback"]
  rescue NoMethodError
    begin
      feedback_object = story_node_object["comet_sections"]["feedback"]["story"]["comet_feed_ufi_container"]["story"]["story_ufi_container"]["story"]["feedback_context"]["feedback_target_with_context"]
    rescue NoMethodError
      feedback_object = story_node_object["comet_sections"]["feedback"]["story"]["story_ufi_container"]["story"]["feedback_context"]["feedback_target_with_context"]
    end
  end

  if feedback_object["comet_ufi_summary_and_actions_renderer"]["feedback"].key?("cannot_see_top_custom_reactions")
    reaction_counts = extract_reaction_counts(feedback_object["comet_ufi_summary_and_actions_renderer"]["feedback"]["cannot_see_top_custom_reactions"]["top_reactions"])
  else
    reaction_counts = extract_reaction_counts(feedback_object["comet_ufi_summary_and_actions_renderer"]["feedback"]["top_reactions"])
  end

  feedback_object = feedback_object["comet_ufi_summary_and_actions_renderer"]["feedback"]

  share_count_object = feedback_object.fetch("share_count", {})

  if story_node_object["comet_sections"]["content"]["story"]["comet_sections"].key?("message") && !story_node_object["comet_sections"]["content"]["story"]["comet_sections"]["message"].nil?
    text = story_node_object["comet_sections"]["content"]["story"]["comet_sections"]["message"]["story"]["message"]["text"]
  else
    text = ""
  end

  if feedback_object.has_key?("comment_list_renderer")
    if feedback_object["comment_list_renderer"]["feedback"].key?("comment_count")
      num_comments = feedback_object["comment_list_renderer"]["feedback"]["comment_count"]["total_count"]
    else
      num_comments = feedback_object["comment_list_renderer"]["feedback"]["total_comment_count"]
    end

    view_count = feedback_object["comet_ufi_summary_and_actions_renderer"]["feedback"]["video_view_count"]
    reshare_warning = feedback_object["comet_ufi_summary_and_actions_renderer"]["feedback"]["should_show_reshare_warning"]
  elsif feedback_object.has_key?("comments_count_summary_renderer")
    num_comments = feedback_object["comments_count_summary_renderer"]["feedback"]["comment_rendering_instance"]["comments"]["total_count"]

    view_count = feedback_object["video_view_count"]
    reshare_warning = feedback_object["should_show_reshare_warning"]
  else
    if feedback_object["feedback"].key?("comment_count")
      num_comments = feedback_object["feedback"]["comment_count"]["total_count"]
    else
      num_comments = feedback_object["feedback"]["total_comment_count"]
    end

    view_count = feedback_object["comet_ufi_summary_and_actions_renderer"]["feedback"]["video_view_count"]
    reshare_warning = feedback_object["comet_ufi_summary_and_actions_renderer"]["feedback"]["should_show_reshare_warning"]
  end

  video_object_url_subsearch = video_object
  video_object_url_subsearch = video_object_url_subsearch["videoDeliveryLegacyFields"] if video_object_url_subsearch.has_key?("videoDeliveryLegacyFields")
  # if video_object.key?("browser_native_hd_url") || video_object.key?("browser_native_sd_url")
  video_url = video_object_url_subsearch["browser_native_hd_url"] || video_object_url_subsearch["browser_native_sd_url"]

  post_details = {
    id: video_object["id"],
    num_comments: num_comments,
    num_shares: share_count_object.fetch("count", nil),
    num_views: view_count,
    reshare_warning: reshare_warning,
    video_preview_image_url: video_object["preferred_thumbnail"]["image"]["uri"],
    video_url: video_url,
    text: text,
    created_at: creation_date,
    profile_link: story_node_object["comet_sections"]["context_layout"]["story"]["comet_sections"]["actor_photo"]["story"]["actors"][0]["url"],
    has_video: true
  }
  post_details[:video_preview_image_file] = Forki.retrieve_media(post_details[:video_preview_image_url])
  post_details[:video_file] = Forki.retrieve_media(post_details[:video_url])
  post_details[:reactions] = reaction_counts
  post_details
end

#extract_video_post_data_alternative(graphql_object_array) ⇒ Object

Raises:



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# File 'lib/forki/scrapers/post_scraper.rb', line 368

def extract_video_post_data_alternative(graphql_object_array)
  sidepane_object = graphql_object_array.find { |graphql_object| graphql_object.key?("tahoe_sidepane_renderer") }
  video_object = graphql_object_array.find { |graphql_object| graphql_object.has_key?("video") }

  raise Forki::ContentUnavailableError if sidepane_object.nil? && video_object.nil?

  feedback_object = sidepane_object["tahoe_sidepane_renderer"]["video"]["feedback"]

  if sidepane_object["tahoe_sidepane_renderer"]["video"]["feedback"].key?("cannot_see_top_custom_reactions")
    reaction_counts = extract_reaction_counts(sidepane_object["tahoe_sidepane_renderer"]["video"]["feedback"]["cannot_see_top_custom_reactions"]["top_reactions"])
  else # if the video has no reactions, it will have a different structure
    reaction_counts = extract_reaction_counts(sidepane_object["tahoe_sidepane_renderer"]["video"]["feedback"]["top_reactions"])
  end

  share_count_object = feedback_object.fetch("share_count", {})

  if feedback_object["comments_count_summary_renderer"]["feedback"].has_key?("comment_rendering_instance")
    num_comments = feedback_object["comments_count_summary_renderer"]["feedback"]["comment_rendering_instance"]["comments"]["total_count"]
  else
    num_comments = feedback_object["comments_count_summary_renderer"]["feedback"]["total_comment_count"]
  end

  text = sidepane_object["tahoe_sidepane_renderer"]["video"]["creation_story"]["comet_sections"].dig("message", "story", "message", "text")
  text = "" if text.nil?

  video_url = video_object["video"]["playable_url_quality_hd"] || video_object["video"]["browser_native_hd_url"] || video_object["video"]["browser_native_sd_url"] || video_object["video"]["playable_url"]
  if video_url.nil? && video_object["video"].key?("videoDeliveryLegacyFields")
    video_url = video_object["video"]["videoDeliveryLegacyFields"]["browser_native_hd_url"] || video_object["video"]["videoDeliveryLegacyFields"]["browser_native_sd_url"]
  end

  post_details = {
    id: video_object["id"],
    num_comments: num_comments,
    num_shares: share_count_object.fetch("count", nil),
    num_views: feedback_object["video_view_count"],
    reshare_warning: feedback_object["should_show_reshare_warning"],
    video_preview_image_url: video_object["video"]["preferred_thumbnail"]["image"]["uri"],
    video_url: video_url,
    text: text,
    created_at: video_object["video"]["publish_time"],
    profile_link: sidepane_object["tahoe_sidepane_renderer"]["video"]["creation_story"]["comet_sections"]["actor_photo"]["story"]["actors"][0]["url"],
    has_video: true
  }

  post_details[:video_preview_image_file] = Forki.retrieve_media(post_details[:video_preview_image_url])
  post_details[:video_file] = Forki.retrieve_media(post_details[:video_url])
  post_details[:reactions] = reaction_counts
  post_details
end

#extract_video_post_data_from_watch_page(graphql_strings) ⇒ Object

Extract data from a non-live video post on the watch page



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# File 'lib/forki/scrapers/post_scraper.rb', line 533

def extract_video_post_data_from_watch_page(graphql_strings)
  return extract_live_video_post_data_from_watch_page(graphql_strings) if current_url.include?("live")
  video_object = graphql_strings.map { |g| JSON.parse(g) }.find { |x| x.key?("video") }
  creation_story_object = JSON.parse(graphql_strings.find { |graphql_string| (graphql_string.include?("creation_story")) && \
                                                        (graphql_string.include?("live_status")) })
  video_permalink = creation_story_object["creation_story"]["shareable"]["url"].delete("\\")
  media_object = video_object["video"]["story"]["attachments"][0]["media"]

  if creation_story_object["feedback"].key?("cannot_see_top_custom_reactions")
    reaction_counts = extract_reaction_counts(creation_story_object["feedback"]["cannot_see_top_custom_reactions"]["top_reactions"])
  else
    reaction_counts = extract_reaction_counts(creation_story_object["feedback"]["top_reactions"])
  end

  post_details = {
    id: video_object["id"],
    num_comments: creation_story_object["feedback"]["total_comment_count"],
    num_shares: nil, # Not present for watch feed videos?
    num_views: creation_story_object["feedback"]["video_view_count_renderer"]["feedback"]["video_view_count"],
    reshare_warning: creation_story_object["feedback"]["should_show_reshare_warning"],
    video_preview_image_url: video_object["video"]["story"]["attachments"][0]["media"]["preferred_thumbnail"]["image"]["uri"],
    video_url: (media_object.fetch("playable_url_quality_hd", nil) || media_object.fetch("playable_url", nil)).delete("\\"),
    text: (creation_story_object["creation_story"]["message"] || {})["text"],
    created_at: video_object["video"]["story"]["attachments"][0]["media"]["publish_time"],
    profile_link: video_permalink[..video_permalink.index("/videos")],
    has_video: true
  }

  post_details[:video_preview_image_file] = Forki.retrieve_media(post_details[:video_preview_image_url])
  post_details[:video_file] = Forki.retrieve_media(post_details[:video_url])
  post_details[:reactions] = reaction_counts
  post_details
end

#find_number_of_views ⇒ Object

Searches the DOM to finds the number of times a (video) post has been viewed. Returns nil if it can’t find a DOM element with the view count



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# File 'lib/forki/scrapers/post_scraper.rb', line 14

def find_number_of_views
  views_pattern = /[0-9MK, ]+Views/
  spans = all("span")
  views_span = spans.find { |s| s.text(:all) =~ views_pattern }
  Scraper.extract_int_from_num_element(views_span)
end

#get_graphql_objects(graphql_strings) ⇒ Object 



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# File 'lib/forki/scrapers/post_scraper.rb', line 47

def get_graphql_objects(graphql_strings)
  graphql_strings.map { |graphql_object| JSON.parse(graphql_object) }
end

#is_post_available? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/forki/scrapers/post_scraper.rb', line 138

def is_post_available?
  begin
    # This Video Isn't Available Anymore
    find("span", wait: 5, text: "content isn't available", exact_text: false)
  rescue Capybara::ElementNotFound, Selenium::WebDriver::Error::StaleElementReferenceError
    begin
      find("span", wait: 5, text: "This Video Isn't Available Anymore", exact_text: false)
    rescue Capybara::ElementNotFound, Selenium::WebDriver::Error::StaleElementReferenceError
      begin
        find("span", wait: 5, text: "This Page Isn't Available", exact_text: false)
      rescue Capybara::ElementNotFound, Selenium::WebDriver::Error::StaleElementReferenceError
        return true
      end
    end
  end

  false
end

#parse(url) ⇒ Object

Uses GraphQL data and DOM elements to collect information about the current post



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# File 'lib/forki/scrapers/post_scraper.rb', line 628

def parse(url)
  validate_and_load_page(url)
  graphql_strings = find_graphql_data_strings(page.html)

  post_data = extract_post_data(graphql_strings)

  post_data[:url] = url
  user_url = post_data[:profile_link]

  5.times do
    begin
      post_data[:screenshot_file] = take_screenshot
      break
    rescue Net::ReadTimeout; end

    sleep(5)
  end

  # page.quit # Close browser between page navigation to prevent cache folder access issues

  post_data[:user] = User.lookup(user_url).first
  page.quit

  post_data
rescue Net::ReadTimeout => e
  puts "Time out error: #{e}"
  puts e.backtrace
  raise Forki::RetryableError # This insures it'll eventually be retried by Hypatia
rescue StandardError => e
  raise e
  raise Forki::RetryableError
ensure
  # `page` here can be broken already. In which case we want to raise an error so it's retried later
  begin
    page.quit
  rescue Curl::Err::ConnectionFailedError
    raise Forki::RetryableError # This insures it'll eventually be retried by Hypatia
  rescue StandardError => e
    puts "Error closing browser: #{e}"
    raise e
    # raise Forki::RetryableError
  end
end

#take_screenshot ⇒ Object 



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# File 'lib/forki/scrapers/post_scraper.rb', line 610

def take_screenshot
  # First check whether post being scraped has a fact check overlay. If it does clear it.
  begin
    find('div[aria-label=" See Photo "]').click() || find('div[aria-label=" See Video "]').click()
  rescue Capybara::ElementNotFound
    # Do nothing if element not found
  end

  begin
    # rubocop:disable Lint/Debugger
    save_screenshot("#{Forki.temp_storage_location}/facebook_screenshot_#{SecureRandom.uuid}.png")
    # rubocop:enable Lint/Debugger
  rescue Selenium::WebDriver::Error::TimeoutError
    raise Net::ReadTimeout
  end
end