add desktop/mobile/tablet badges to events log

lib/detect_browser_device.rb

@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+module DetectBrowserDevice
+  module_function
+
+  # rubocop:disable Metrics/LineLength
+  MOBILE_USER_AGENT_REGEXP = /iPhone|iPod|Android.*Mobile|Opera Mini|Opera Mobi|webOS|IEMobile|Windows Phone|BlackBerry|BB10|Mobile/i
+  TABLET_USER_AGENT_REGEXP = /iPad|Android(?!.*Mobile)|Tablet|Kindle|PlayBook|Silk/i
+  # rubocop:enable Metrics/LineLength
+
+  def call(user_agent)
+    return :mobile if mobile?(user_agent)
+    return :tablet if tablet?(user_agent)
+
+    :desktop
+  end
+
+  def mobile?(user_agent)
+    user_agent.to_s =~ MOBILE_USER_AGENT_REGEXP
+  end
+
+  def tablet?(user_agent)
+    user_agent.to_s =~ TABLET_USER_AGENT_REGEXP
+  end
+end