237 lines
8.4 KiB
Ruby
237 lines
8.4 KiB
Ruby
# frozen_string_literal: true
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require 'json'
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require "onebox/open_graph"
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module Onebox
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module Engine
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class AmazonOnebox
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include Engine
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include LayoutSupport
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include HTML
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always_https
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matches_regexp(/^https?:\/\/(?:www\.)?(?:smile\.)?(amazon|amzn)\.(?<tld>com|ca|de|it|es|fr|co\.jp|co\.uk|cn|in|com\.br|com\.mx|nl|pl|sa|sg|se|com\.tr|ae)\//)
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def url
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@raw ||= nil
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# If possible, fetch the cached HTML body immediately so we can
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# try to grab the canonical URL from that document,
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# rather than guess at the best URL structure to use
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if !@raw && has_cached_body
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@raw = Onebox::Helpers.fetch_html_doc(@url, http_params, body_cacher)
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end
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if @raw
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canonical_link = @raw.at('//link[@rel="canonical"]/@href')
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return canonical_link.to_s if canonical_link
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end
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if match && match[:id]
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id = Addressable::URI.encode_component(match[:id], Addressable::URI::CharacterClasses::PATH)
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return "https://www.amazon.#{tld}/dp/#{id}"
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end
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@url
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end
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def tld
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@tld ||= @@matcher.match(@url)["tld"]
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end
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def http_params
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if @options && @options[:user_agent]
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{ 'User-Agent' => @options[:user_agent] }
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end
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end
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def to_html(ignore_errors = false)
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unless ignore_errors
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verified_data # forces a check for missing fields
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return '' unless errors.empty?
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end
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super()
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end
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def placeholder_html
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to_html(true)
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end
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def verified_data
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@verified_data ||= begin
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result = data
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required_tags = [:title, :description]
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required_tags.each do |tag|
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if result[tag].blank?
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errors[tag] ||= []
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errors[tag] << 'is blank'
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end
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end
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result
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end
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@verified_data
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end
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private
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def has_cached_body
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body_cacher&.respond_to?('cache_response_body?') &&
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body_cacher.cache_response_body?(uri.to_s) &&
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body_cacher.cached_response_body_exists?(uri.to_s)
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end
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def match
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@match ||= @url.match(/(?:d|g)p\/(?:product\/|video\/detail\/)?(?<id>[A-Z0-9]+)(?:\/|\?|$)/mi)
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end
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def image
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if (main_image = raw.css("#main-image")) && main_image.any?
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attributes = main_image.first.attributes
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if attributes["data-a-hires"]
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return attributes["data-a-hires"].to_s
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elsif attributes["data-a-dynamic-image"]
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return ::JSON.parse(attributes["data-a-dynamic-image"].value).keys.first
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end
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end
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if (landing_image = raw.css("#landingImage")) && landing_image.any?
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attributes = landing_image.first.attributes
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if attributes["data-old-hires"]
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return attributes["data-old-hires"].to_s
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else
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return landing_image.first["src"].to_s
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end
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end
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if (ebook_image = raw.css("#ebooksImgBlkFront")) && ebook_image.any?
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::JSON.parse(ebook_image.first.attributes["data-a-dynamic-image"].value).keys.first
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end
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end
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def price
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# get item price (Amazon markup is inconsistent, deal with it)
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if raw.css("#priceblock_ourprice .restOfPrice")[0] && raw.css("#priceblock_ourprice .restOfPrice")[0].inner_text
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"#{raw.css("#priceblock_ourprice .restOfPrice")[0].inner_text}#{raw.css("#priceblock_ourprice .buyingPrice")[0].inner_text}.#{raw.css("#priceblock_ourprice .restOfPrice")[1].inner_text}"
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elsif raw.css("#priceblock_dealprice") && (dealprice = raw.css("#priceblock_dealprice span")[0])
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dealprice.inner_text
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elsif !raw.css("#priceblock_ourprice").inner_text.empty?
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raw.css("#priceblock_ourprice").inner_text
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else
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result = raw.css('#corePrice_feature_div .a-price .a-offscreen').first&.inner_text
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if result.blank?
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result = raw.css(".mediaMatrixListItem.a-active .a-color-price").inner_text
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end
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result
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end
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end
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def multiple_authors(authors_xpath)
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raw
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.xpath(authors_xpath)
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.map { |a| a.inner_text.strip }
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.join(", ")
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end
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def data
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og = ::Onebox::OpenGraph.new(raw)
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if raw.at_css('#dp.book_mobile') # printed books
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title = raw.at("h1#title")&.inner_text
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authors = raw.at_css('#byline_secondary_view_div') ? multiple_authors("//div[@id='byline_secondary_view_div']//span[@class='a-text-bold']") : raw.at("#byline")&.inner_text
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rating = raw.at("#averageCustomerReviews_feature_div .a-icon")&.inner_text || raw.at("#cmrsArcLink .a-icon")&.inner_text
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table_xpath = "//div[@id='productDetails_secondary_view_div']//table[@id='productDetails_techSpec_section_1']"
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isbn = raw.xpath("#{table_xpath}//tr[8]//td").inner_text.strip
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# if ISBN is misplaced or absent it's hard to find out which data is
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# available and where to find it so just set it all to nil
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if /^\d(\-?\d){12}$/.match(isbn)
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publisher = raw.xpath("#{table_xpath}//tr[1]//td").inner_text.strip
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published = raw.xpath("#{table_xpath}//tr[2]//td").inner_text.strip
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book_length = raw.xpath("#{table_xpath}//tr[6]//td").inner_text.strip
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else
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isbn = publisher = published = book_length = nil
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end
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result = {
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link: url,
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title: title,
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by_info: authors,
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image: og.image || image,
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description: raw.at("#productDescription")&.inner_text,
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rating: "#{rating}#{', ' if rating && (!isbn&.empty? || !price&.empty?)}",
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price: price,
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isbn_asin_text: "ISBN",
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isbn_asin: isbn,
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publisher: publisher,
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published: "#{published}#{', ' if published && !price&.empty?}"
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}
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elsif raw.at_css('#dp.ebooks_mobile') # ebooks
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title = raw.at("#ebooksTitle")&.inner_text
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authors = raw.at_css('#a-popover-mobile-udp-contributor-popover-id') ? multiple_authors("//div[@id='a-popover-mobile-udp-contributor-popover-id']//span[contains(@class,'a-text-bold')]") : (raw.at("#byline")&.inner_text&.strip || raw.at("#bylineInfo")&.inner_text&.strip)
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rating = raw.at("#averageCustomerReviews_feature_div .a-icon")&.inner_text || raw.at("#cmrsArcLink .a-icon")&.inner_text || raw.at("#acrCustomerReviewLink .a-icon")&.inner_text
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table_xpath = "//div[@id='detailBullets_secondary_view_div']//ul"
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asin = raw.xpath("#{table_xpath}//li[4]/span/span[2]").inner_text
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# if ASIN is misplaced or absent it's hard to find out which data is
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# available and where to find it so just set it all to nil
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if /^[0-9A-Z]{10}$/.match(asin)
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publisher = raw.xpath("#{table_xpath}//li[2]/span/span[2]").inner_text
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published = raw.xpath("#{table_xpath}//li[1]/span/span[2]").inner_text
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else
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asin = publisher = published = nil
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end
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result = {
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link: url,
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title: title,
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by_info: authors,
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image: og.image || image,
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description: raw.at("#productDescription")&.inner_text,
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rating: "#{rating}#{', ' if rating && (!asin&.empty? || !price&.empty?)}",
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price: price,
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isbn_asin_text: "ASIN",
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isbn_asin: asin,
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publisher: publisher,
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published: "#{published}#{', ' if published && !price&.empty?}"
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}
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else
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title = og.title || CGI.unescapeHTML(raw.css("title").inner_text)
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result = {
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link: url,
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title: title,
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image: og.image || image,
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price: price
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}
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result[:by_info] = raw.at("#by-line")
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result[:by_info] = Onebox::Helpers.clean(result[:by_info].inner_html) if result[:by_info]
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summary = raw.at("#productDescription")
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description = og.description || summary&.inner_text&.strip
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if description.blank?
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description = raw.css("meta[name=description]").first&.[]("content")
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end
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result[:description] = CGI.unescapeHTML(Onebox::Helpers.truncate(description, 250)) if description
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end
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result[:price] = nil if result[:price].start_with?("$0") || result[:price] == 0
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result
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end
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end
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end
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end
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