FIX: Support new layout on Amazon product pages (#16091)

Some product pages on Amazon are using a new HTML structure, meaning the previous Onebox engine was unable to gather the price and/or description. This change should allow these pages to be Oneboxed.

lib/onebox/engine/amazon_onebox.rb

@@ -124,7 +124,12 @@ module Onebox
         elsif !raw.css("#priceblock_ourprice").inner_text.empty?
           raw.css("#priceblock_ourprice").inner_text
         else
-          raw.css(".mediaMatrixListItem.a-active .a-color-price").inner_text
+          result = raw.css('#corePrice_feature_div .a-price .a-offscreen').inner_text
+          if result.blank?
+            result = raw.css(".mediaMatrixListItem.a-active .a-color-price").inner_text
+          end
+
+          result
         end
       end
 
@@ -215,8 +220,10 @@ module Onebox
 
           summary = raw.at("#productDescription")
 
-          description = og.description || summary&.inner_text
+          description = og.description || summary&.inner_text&.strip
-          description ||= raw.css("meta[name=description]").first&.[]("content")
+          if description.blank?
+            description = raw.css("meta[name=description]").first&.[]("content")
+          end
           result[:description] = CGI.unescapeHTML(Onebox::Helpers.truncate(description, 250)) if description
         end
 

spec/lib/onebox/engine/amazon_onebox_spec.rb

@@ -215,4 +215,34 @@ describe Onebox::Engine::AmazonOnebox do
     end
   end
 
+  context "alternate page layout response from Amazon" do
+    let(:link) { "https://www.amazon.com/dp/B07FQ7M16H" }
+    let(:html) { described_class.new(link).to_html }
+
+    before do
+      stub_request(:get, "https://www.amazon.com/dp/B07FQ7M16H")
+        .to_return(status: 200, body: onebox_response("amazon-alternate"))
+
+      stub_request(:get, "https://www.amazon.com/Lnchett-Nibbler-Quality-Attachment-Straight/dp/B07FQ7M16H")
+        .to_return(status: 200, body: onebox_response("amazon-alternate"))
+    end
+
+    describe "#to_html" do
+      it "includes image" do
+        expect(html).to include("https://m.media-amazon.com/images/I/71y4BRqNP7L._AC_SL1500_.jpg")
+      end
+
+      it "includes description" do
+        expect(html).to include("Drill Attachment for Straight Curve and Circle Cutting, Maximum 14 Gauge Steel")
+      end
+
+      it "includes price" do
+        expect(html).to include("$37.99")
+      end
+
+      it "includes title" do
+        expect(html).to include("Quality Nibbler Drill Attachment...")
+      end
+    end
+  end
 end