GoogleAnalytics.cs

using Newtonsoft.Json.Linq;
using RestSharp;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Web.Mvc;
using System.Web.Script.Serialization;

namespace Admin.Controllers
{
    public class ActivityController : BaseController
    {
        private string clientId = ConfigurationManager.AppSettings["AnalyticsClientId"];
        private string clientSecret = ConfigurationManager.AppSettings["AnalyticsClientSecret"];
        private string returnUri = ConfigurationManager.AppSettings["AnalyticsClientRedirect"];

        private Token token = new Token();

        public ActionResult Index()
        {
            if (System.Web.HttpContext.Current.Cache["AnayticsCachedToken"] != null)
            {
                return RedirectToAction("Authorization", new { token = (Token)System.Web.HttpContext.Current.Cache["AnayticsCachedToken"] });
            }
            else
            {
                var clientAuth = new RestClient();
                clientAuth.BaseUrl = new Uri("https://accounts.google.com/o/oauth2/auth");

                var request = new RestRequest(Method.GET);
                request.RequestFormat = DataFormat.Json;
                request.AddParameter("redirect_uri", returnUri);
                request.AddParameter("scope", "https://www.googleapis.com/auth/analytics https://www.googleapis.com/auth/analytics.readonly");
                request.AddParameter("response_type", "code");
                request.AddParameter("client_id", clientId);
                request.AddParameter("approval_prompt", "force");

                var response = clientAuth.Execute(request);
                return Redirect(response.ResponseUri.ToString());
            }
        }

        public ActionResult Authorization(string code, Token token)
        {
            if (!string.IsNullOrWhiteSpace(code))
            {
                var client = new RestClient();
                client.BaseUrl = new Uri("https://www.googleapis.com/oauth2/v3/token");
                var request = new RestRequest(Method.POST);

                request.AddParameter("code", code);
                request.AddParameter("redirect_uri", returnUri);
                request.AddParameter("client_id", clientId);
                request.AddParameter("client_secret", clientSecret);
                request.AddParameter("scope", "https://www.googleapis.com/auth/analytics https://www.googleapis.com/auth/analytics.readonly");
                request.AddParameter("grant_type", "authorization_code");

                var response = client.Execute(request);
                response.ContentType = "application/x-www-form-urlencoded";

                if (response.StatusCode == System.Net.HttpStatusCode.OK)
                {
                    try
                    {
                        var json = new JavaScriptSerializer();
                        var data = json.Deserialize<Dictionary<string, string>>(response.Content);

                        string access_token = data.FirstOrDefault(x => x.Key == "access_token").Value;
                        string token_type = data.FirstOrDefault(x => x.Key == "token_type").Value;
                        string expires_in = data.FirstOrDefault(x => x.Key == "expires_in").Value;
                        string refresh_token = data.FirstOrDefault(x => x.Key == "refresh_token").Value;

                        token = new Token
                        {
                            access_token = access_token,
                            expires_in = expires_in,
                            refresh_token = refresh_token,
                            token_type = token_type
                        };

                        System.Web.HttpContext.Current.Cache["AnayticsCachedToken"] = token;
                        return RedirectToAction("Result", new { token = token });
                    }
                    catch (Exception ex)
                    {
                        var error = ex.Message;
                    }
                }
            }
            else if (System.Web.HttpContext.Current.Cache["AnayticsCachedToken"] != null)
            {
                token = (Token)System.Web.HttpContext.Current.Cache["AnayticsCachedToken"];
                return RedirectToAction("Result", new { token = token });
            }

            return View();
        }

        public ActionResult Result()
        {
            if (System.Web.HttpContext.Current.Cache["AnayticsCachedToken"] != null)
            {
                token = (Token)System.Web.HttpContext.Current.Cache["AnayticsCachedToken"];

                var client = new RestClient();
                client.BaseUrl = new Uri("https://www.googleapis.com/analytics/v3/data/realtime");

                var request = new RestRequest(Method.GET);
                request.AddParameter("access_token", token.access_token);
                request.AddParameter("ids", "ga:104837543");
                request.AddParameter("metrics", "rt:activeUsers");
                request.AddParameter("dimensions", "rt:pagePath,rt:pageTitle");

                var response = client.Execute(request);
                response.ContentType = "application/json";
                if (response.StatusCode == System.Net.HttpStatusCode.OK)
                {
                    //var json = new JavaScriptSerializer();
                    var data = new RealTimeData();

                    JObject o = JObject.Parse(response.Content);
                    foreach (var result in o.SelectToken("$..totalsForAllResults"))
                    {
                        data.ActiveUserCount = Convert.ToInt32(result["rt:activeUsers"]);
                    }

                    if (o.SelectToken("$..rows") != null)
                    {
                        foreach (var result in o.SelectToken("$..rows"))
                        {
                            var pages = new RealTimePages
                            {
                                Page = result[0].ToString(),
                                Heading = result[1].ToString(),
                                Count = Convert.ToInt32(result[2].ToString())
                            };

                            data.RealTimePages.Add(pages);
                        }
                    }
                }
            }

            return View();
        }
    }

    public class RealTimeData
    {
        public int ActiveUserCount { get; set; }

        public List<RealTimePages> RealTimePages { get; set; }
    }

    public class RealTimePages
    {
        public string Page { get; set; }

        public string Heading { get; set; }

        public int Count { get; set; }
    }
}