Design flow for enabling push and the various status that go with it

app/models/application_platform.rb

@@ -15,6 +15,14 @@ class ApplicationPlatform < PlatformAgent
     user_agent.browser.match? /Chrome/
   end
 
+  def edge?
+    user_agent.browser.match? /Edg/
+  end
+
+  def firefox?
+    user_agent.browser.match? /Firefox|FxiOS/
+  end
+
   def safari?
     user_agent.browser.match? /Safari/
   end
@@ -26,4 +34,21 @@ class ApplicationPlatform < PlatformAgent
   def desktop?
     !mobile?
   end
+
+  def windows?
+    operating_system == "Windows"
+  end
+
+  def operating_system
+    case user_agent.platform
+    when /Android/   then "Android"
+    when /iPad/      then "iPad"
+    when /iPhone/    then "iPhone"
+    when /Macintosh/ then "macOS"
+    when /Windows/   then "Windows"
+    when /CrOS/      then "ChromeOS"
+    else
+      os =~ /Linux/ ? "Linux" : os
+    end
+  end
 end