From 08670860dc388a084fc5ca6ca3d267e927db59d2 Mon Sep 17 00:00:00 2001
From: Wender Freese <wender.jean@gmail.com>
Date: Wed, 29 Jan 2020 15:33:57 -0300
Subject: [PATCH] Add Event driven Instrumentation (#1)

---
 lib/recaptcha.rb                 |  4 ++++
 lib/recaptcha/instrumentation.rb | 19 +++++++++++++++++++
 2 files changed, 23 insertions(+)
 create mode 100644 lib/recaptcha/instrumentation.rb

diff --git a/lib/recaptcha.rb b/lib/recaptcha.rb
index d8e30c5f..05c63b3f 100644
--- a/lib/recaptcha.rb
+++ b/lib/recaptcha.rb
@@ -8,6 +8,7 @@
 require 'recaptcha/helpers'
 require 'recaptcha/adapters/controller_methods'
 require 'recaptcha/adapters/view_methods'
+require 'recaptcha/instrumentation'
 if defined?(Rails)
   require 'recaptcha/railtie'
 end
@@ -99,6 +100,9 @@ def self.verify_via_api_call_free(response, options)
     verify_hash['remoteip'] = options[:remote_ip] if options.key?(:remote_ip)
 
     reply = api_verification_free(verify_hash, timeout: options[:timeout], json: options[:json])
+    Instrumentation.report(
+      { token: response, options: options, response: reply }
+    )
     success = reply['success'].to_s == 'true' &&
       hostname_valid?(reply['hostname'], options[:hostname]) &&
       action_valid?(reply['action'], options[:action]) &&
diff --git a/lib/recaptcha/instrumentation.rb b/lib/recaptcha/instrumentation.rb
new file mode 100644
index 00000000..dc38b226
--- /dev/null
+++ b/lib/recaptcha/instrumentation.rb
@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+module Recaptcha
+  class Instrumentation
+    CHANNEL = 'Recaptcha::API::Response'
+
+    def self.report(payload = {})
+      ActiveSupport::Notifications.instrument(CHANNEL, payload)
+    end
+
+    def self.subscribe(&block)
+      ActiveSupport::Notifications.subscribe(CHANNEL) do |*args|
+        event = ActiveSupport::Notifications::Event.new(*args)
+
+        yield event if block_given?
+      end
+    end
+  end
+end