FEATURE: Onebox for Embed Motoko (#19293)

lib/onebox/engine.rb

@@ -211,3 +211,4 @@ require_relative "engine/reddit_media_onebox"
 require_relative "engine/google_drive_onebox"
 require_relative "engine/facebook_media_onebox"
 require_relative "engine/hackernews_onebox"
+require_relative "engine/motoko_onebox"

lib/onebox/engine/motoko_onebox.rb

@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+module Onebox
+  module Engine
+    class MotokoOnebox
+      include Engine
+      include StandardEmbed
+
+      matches_regexp(/^https?:\/\/embed\.smartcontracts\.org\/?.*/)
+      requires_iframe_origins "https://embed.smartcontracts.org"
+      always_https
+
+      def to_html
+        get_oembed.html
+      end
+
+      def placeholder_html
+        ::Onebox::Helpers.generic_placeholder_html
+      end
+
+      protected
+
+      def get_oembed_url
+        "https://embed.smartcontracts.org/api/onebox?url=#{url}"
+      end
+    end
+  end
+end

spec/lib/onebox/engine/motoko_onebox_spec.rb

@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+RSpec.describe Onebox::Engine::MotokoOnebox do
+  before do
+    body = '{"version":"1.0","provider_name":"Embed Motoko","provider_url":"https://embed.smartcontracts.org","type":"rich","width":800,"height":500,"html":"<iframe src=\"https://embed.smartcontracts.org\" width=\"800\" height=\"500\" style=\"border:0\" />"}'
+
+    stub_request(:get, "https://embed.smartcontracts.org/api/onebox?url=https://embed.smartcontracts.org")
+      .to_return(status: 200, body: body, headers: {})
+  end
+
+  it "returns the expected iframe markup" do
+    expect(Onebox.preview('https://embed.smartcontracts.org').to_s.chomp).to include(
+      '<iframe src="https://embed.smartcontracts.org" width="800" height="500" style="border:0"'
+    )
+  end
+end