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82 lines
2.6 KiB
Ruby
82 lines
2.6 KiB
Ruby
require_dependency 'nokogiri'
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class TopicEmbed < ActiveRecord::Base
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belongs_to :topic
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belongs_to :post
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validates_presence_of :embed_url
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validates_presence_of :content_sha1
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# Import an article from a source (RSS/Atom/Other)
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def self.import(user, url, title, contents)
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return unless url =~ /^https?\:\/\//
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contents << "\n<hr>\n<small>#{I18n.t('embed.imported_from', link: "<a href='#{url}'>#{url}</a>")}</small>\n"
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embed = TopicEmbed.where(embed_url: url).first
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content_sha1 = Digest::SHA1.hexdigest(contents)
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post = nil
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# If there is no embed, create a topic, post and the embed.
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if embed.blank?
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Topic.transaction do
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creator = PostCreator.new(user, title: title, raw: absolutize_urls(url, contents), skip_validations: true, cook_method: Post.cook_methods[:raw_html])
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post = creator.create
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if post.present?
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TopicEmbed.create!(topic_id: post.topic_id,
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embed_url: url,
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content_sha1: content_sha1,
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post_id: post.id)
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end
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end
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else
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post = embed.post
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# Update the topic if it changed
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if content_sha1 != embed.content_sha1
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revisor = PostRevisor.new(post)
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revisor.revise!(user, absolutize_urls(url, contents), skip_validations: true, bypass_rate_limiter: true)
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embed.update_column(:content_sha1, content_sha1)
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end
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end
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post
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end
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def self.import_remote(user, url, opts=nil)
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require 'ruby-readability'
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opts = opts || {}
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doc = Readability::Document.new(open(url).read,
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tags: %w[div p code pre h1 h2 h3 b em i strong a img ul li ol],
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attributes: %w[href src])
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TopicEmbed.import(user, url, opts[:title] || doc.title, doc.content)
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end
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# Convert any relative URLs to absolute. RSS is annoying for this.
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def self.absolutize_urls(url, contents)
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uri = URI(url)
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prefix = "#{uri.scheme}://#{uri.host}"
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prefix << ":#{uri.port}" if uri.port != 80 && uri.port != 443
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fragment = Nokogiri::HTML.fragment(contents)
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fragment.css('a').each do |a|
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href = a['href']
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if href.present? && href.start_with?('/')
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a['href'] = "#{prefix}/#{href.sub(/^\/+/, '')}"
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end
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end
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fragment.css('img').each do |a|
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src = a['src']
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if src.present? && src.start_with?('/')
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a['src'] = "#{prefix}/#{src.sub(/^\/+/, '')}"
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end
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end
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fragment.to_html
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end
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def self.topic_id_for_embed(embed_url)
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TopicEmbed.where(embed_url: embed_url).pluck(:topic_id).first
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end
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end
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