discourse/lib/onebox/open_graph.rb

59 lines
1.4 KiB
Ruby

# frozen_string_literal: true
module Onebox
class OpenGraph < Normalizer
def initialize(doc)
@data = extract(doc)
end
def title
get(:title, 80)
end
def title_attr
!title.nil? ? "title='#{title}'" : ""
end
def secure_image_url
secure_url = URI(get(:image))
secure_url.scheme = "https"
secure_url.to_s
end
private
COLLECTIONS = %i[article_section article_section_color article_tag]
def extract(doc)
return {} if Onebox::Helpers.blank?(doc)
data = {}
doc
.css("meta")
.each do |m|
if (m["property"] && m["property"][/\A(?:og|article|product):(.+)\z/i]) ||
(m["name"] && m["name"][/\A(?:og|article|product):(.+)\z/i])
value = (m["content"] || m["value"]).to_s
next if Onebox::Helpers.blank?(value)
key = $1.tr("-:", "_").to_sym
data[key] ||= value
if key.in?(COLLECTIONS)
collection_name = "#{key}s".to_sym
data[collection_name] ||= []
data[collection_name] << value
end
end
end
# Attempt to retrieve the title from the meta tag
title_element = doc.at_css("title")
if title_element && title_element.text
data[:title] ||= title_element.text unless Onebox::Helpers.blank?(title_element.text)
end
data
end
end
end