FEATURE: Add audio.com onebox provider (#22936)

* Audio.com provider added to onebox
* added specs for audio.com onebox provider

lib/onebox/engine/audio_com_onebox.rb

@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+module Onebox
+  module Engine
+    class AudioComOnebox
+      include Engine
+      include StandardEmbed
+
+      matches_regexp(%r{^https?://audio\.com})
+      requires_iframe_origins "https://audio.com"
+      always_https
+
+      def to_html
+        oembed = get_oembed
+        oembed.html.gsub("visual=true", "visual=false")
+      end
+
+      def placeholder_html
+        oembed = get_oembed
+        return if Onebox::Helpers.blank?(oembed.thumbnail_url)
+        "<img src='#{oembed.thumbnail_url}' #{oembed.title_attr}>"
+      end
+
+      protected
+
+      def get_oembed_url
+        oembed_url = "https://api.audio.com/oembed?url=#{url}"
+        oembed_url += "&maxheight=228" unless url["/collections/"]
+        oembed_url
+      end
+    end
+  end
+end

spec/fixtures/onebox/audio_com_audio_oembed.response

@@ -0,0 +1 @@
+{"type":"rich","version":1,"title":"Discourse onebox test audio","author_name":"Roman Agilov","author_url":"https://audio.com/agilov","provider_name":"audio.com","provider_url":"https://audio.com","cache_age":432000,"html":"<iframe src=\"https://audio.com/embed/audio/1773123508340882?theme=image\" width=\"600\" height=\"204\" style=\"border-radius: 6px; border: none; height: 204px; width: 600px;\"></iframe>","width":600,"height":204}

spec/fixtures/onebox/audio_com_collection_oembed.response

@@ -0,0 +1 @@
+{"type":"rich","version":1,"title":"Discourse test collection","author_name":"Roman Agilov","author_url":"https://audio.com/agilov","provider_name":"audio.com","provider_url":"https://audio.com","cache_age":432000,"html":"<iframe src=\"https://audio.com/embed/collection/1773124246389900?theme=image\" width=\"600\" height=\"696\" style=\"border-radius: 6px; border: none; height: 696px; width: 600px;\" allowtransparency=\"true\"></iframe>","width":600,"height":696}

spec/lib/onebox/engine/audio_com_onebox_spec.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+RSpec.describe Onebox::Engine::AudioComOnebox do
+  it "has the iframe with the correct audio" do
+    stub_request(
+      :get,
+      "https://api.audio.com/oembed?maxheight=228&url=https://audio.com/agilov/audio/discourse-onebox-test-audio",
+    ).to_return(status: 200, body: onebox_response("audio_com_audio_oembed"))
+    expect(
+      Onebox.preview("https://audio.com/agilov/audio/discourse-onebox-test-audio").to_s,
+    ).to match(%r{<iframe src="https://audio\.com/embed/audio/1773123508340882})
+  end
+
+  it "has the iframe with the correct collection" do
+    stub_request(
+      :get,
+      "https://api.audio.com/oembed?url=https://audio.com/agilov/collections/discourse-test-collection",
+    ).to_return(status: 200, body: onebox_response("audio_com_collection_oembed"))
+    expect(
+      Onebox.preview("https://audio.com/agilov/collections/discourse-test-collection").to_s,
+    ).to match(%r{<iframe src="https://audio\.com/embed/collection/1773124246389900})
+  end
+end