Add support to request permission for adding moment types

Owin.Security.Providers/GooglePlus/GooglePlusAuthenticationHandler.cs

@@ -188,12 +188,14 @@ namespace Owin.Security.Providers.GooglePlus
                     "&scope=" + Uri.EscapeDataString(scope) +
                     "&state=" + Uri.EscapeDataString(state);
 
+                // Check if offline access was requested
                 if (Options.RequestOfflineAccess)
                     authorizationEndpoint += "&access_type=offline";
-                    //"&request_visible_actions=http://schemas.google.com/AddActivity" +
-                    //"&approval_prompt=force" +
-                    //"&include_granted_scopes=true"
-                    ;
+
+                // Request the moment types
+                if (Options.MomentTypes.Count > 0)
+                    authorizationEndpoint += String.Format("&request_visible_actions={0}",
+                        String.Join(" ", Options.MomentTypes));
 
                 Response.Redirect(authorizationEndpoint);
             }

Owin.Security.Providers/GooglePlus/GooglePlusAuthenticationOptions.cs

@@ -63,6 +63,12 @@ namespace Owin.Security.Providers.GooglePlus
         /// </summary>
         public string ClientSecret { get; set; }
 
+        /// <summary>
+        /// The list of moment types which you application wants to write. During authentication this will be passed through via the request_visible_actions parameter.
+        /// For more information of the moment types you may request, see https://developers.google.com/+/api/moment-types/
+        /// </summary>
+        public IList<string> MomentTypes { get; private set; }
+
         /// <summary>
         ///     Gets or sets the <see cref="IGooglePlusAuthenticationProvider" /> used in the authentication events
         /// </summary>
@@ -98,6 +104,7 @@ namespace Owin.Security.Providers.GooglePlus
             Caption = Constants.DefaultAuthenticationType;
             CallbackPath = new PathString("/signin-googleplus");
             AuthenticationMode = AuthenticationMode.Passive;
+            MomentTypes = new List<string>();
             Scope = new List<string>
             {
                 "https://www.googleapis.com/auth/plus.login",

OwinOAuthProvidersDemo/App_Start/Startup.Auth.cs

@@ -50,17 +50,22 @@ namespace OwinOAuthProvidersDemo
 
             //app.UseGitHubAuthentication("", "");
 
-            var options = new GooglePlusAuthenticationOptions
-            {
-                ClientId = "",
-                ClientSecret = "",
-                RequestOfflineAccess = true,
-                Provider = new GooglePlusAuthenticationProvider
-                {
-                    OnAuthenticated = async context => System.Diagnostics.Debug.WriteLine(String.Format("Refresh Token: {0}", context.RefreshToken))
-                }
-            };
-            app.UseGooglePlusAuthentication(options);
+
+            //var options = new GooglePlusAuthenticationOptions
+            //{
+            //    ClientId = "",
+            //    ClientSecret = "",
+            //    RequestOfflineAccess = true,
+            //    Provider = new GooglePlusAuthenticationProvider
+            //    {
+            //        OnAuthenticated = async context => System.Diagnostics.Debug.WriteLine(String.Format("Refresh Token: {0}", context.RefreshToken))
+            //    }
+            //};
+            //options.MomentTypes.Add("http://schemas.google.com/AddActivity");
+            //options.MomentTypes.Add("http://schemas.google.com/CheckInActivity");
+            //options.MomentTypes.Add("http://schemas.google.com/BuyActivity");
+            //app.UseGooglePlusAuthentication(options);
+
 
             //app.UseOpenIDAuthentication("http://me.yahoo.com/", "Yahoo");