Interfacing with viaplay content api

Viaplay.cs

using System;
using System.Net;
using Nimble.JSON;
using System.Text.RegularExpressions;
using System.Collections.Generic;

namespace Viaplay
{
  public class Viaplay
  {
    private const string USERAGENT = "Mozilla/5.0 (iPad; CPU OS 5_1 like Mac OS X; en-us) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9B176 Safari/7534.48.3";
    private const string BASE_URL = "https://content.viaplay.se/";
    private CookieAwareWebClient client;

    private string s_site;

    private Dictionary<string, string> d_sections;

    public Dictionary<string, string> Sections
    {
      get
      {
        return d_sections;
      }

      set
      {
        d_sections = value;
      }
    }

    public Viaplay(string site = "se")
    {
      client = new CookieAwareWebClient();
      client.Headers[HttpRequestHeader.UserAgent] = USERAGENT;

      s_site = site;
    }

    public void Login(string email, string password)
    {
      string deviceKey = GetDeviceKey(s_site);
      string api = "https://login.viaplay." + s_site + "/api";
      string url = api + "/persistentLogin/v1?deviceKey=" + deviceKey + "&returnurl=http%3A%2F%2Fcontent.viaplay." + s_site + "%2F" + deviceKey;
      bool loginResult = false;

      try
      {
        dynamic loginPage = Json.JsonDecode(client.DownloadString(url));
        loginResult = loginPage["success"];
      }
      catch
      {
        loginResult = false;
      }
      if (!loginResult)
      {
        string authUrl = api + "/login/v1?deviceKey=" + deviceKey + "&returnurl=http%3A%2F%2Fcontent.viaplay." + s_site + "%2F" + deviceKey + "&username=" + email + "&password=" + password + "&persisten=true";
        dynamic loginPage = Json.JsonDecode(client.DownloadString(authUrl));
        if (!loginPage["success"])
        {
          throw new Exception("Dangit");
        }
      }

      GetSections();
    }

    private void GetSections()
    {
      d_sections = new Dictionary<string, string>();
      dynamic item = Json.JsonDecode(client.DownloadString(BASE_URL + GetDeviceKey(s_site)));
      foreach (var section in item["_links"]["viaplay:sections"]) {
        d_sections.Add(section["title"], section["href"]);
      }
    }

    public List<ViaplayItem> GetSection(string url)
    {
      url = url.Replace("{?dtg}", "");
      dynamic item = Json.JsonDecode(client.DownloadString(url));

      List<ViaplayItem> ret = new List<ViaplayItem>();
      foreach (var series in item["_embedded"]["viaplay:blocks"][0]["_embedded"]["viaplay:products"])
      {
        ViaplayItem vi = new ViaplayItem();
        vi.Title = series["content"]["series"]["title"];
        vi.Seasons = series["content"]["series"]["seasons"];
        vi.Synopsis = series["content"]["series"]["synopsis"];
        vi.Href = series["_links"]["viaplay:page"]["href"];
        ret.Add(vi);
      }
      return ret;
    }

    //Redundant?
    public void GetItemPage(string url)
    {
      url = url.Replace("{?dtg}", "");
      dynamic item = Json.JsonDecode(client.DownloadString(url));
    }

    public List<ViaplayItem> GetSeasonEpisodes(string url, int season = 1)
    {
      url = url.Replace("{?dtg}", "");
      dynamic item = Json.JsonDecode(client.DownloadString(url));
      var t = item["_embedded"]["viaplay:blocks"][season];
      while(t["type"] == "article")
      {
        season++;
        t = item["_embedded"]["viaplay:blocks"][season];
      }
      item = Json.JsonDecode(client.DownloadString(t["_links"]["self"]["href"]));

      List<ViaplayItem> ret = new List<ViaplayItem>();
      foreach (var episode in item["_embedded"]["viaplay:products"])
      {
        ViaplayItem vi = new ViaplayItem();
        vi.Title = episode["content"]["title"];
        vi.Synopsis = episode["content"]["synopsis"];
        vi.Href = episode["_links"]["self"]["href"];
        ret.Add(vi);
      }
      return ret;
    }

    public string GetStream(string url)
    {
      dynamic item = Json.JsonDecode(client.DownloadString(url));
      string streamUrl = item["_embedded"]["viaplay:product"]["_links"]["viaplay:stream"]["href"];

      streamUrl = Regex.Replace(streamUrl, "(.+)({\\?deviceId.+userAgent})(.+)", "$1?deviceId=deviceId&deviceName=deviceName&deviceType=deviceType&userAgent=userAgent$3");
      dynamic streamItem = Json.JsonDecode(client.DownloadString(streamUrl));
      string b = streamItem["_links"]["viaplay:playlist"]["href"];
      return b;
    }

    private string GetDeviceKey(string site)
    {
      return "androidnodrmv2-" + site;
    }
  }
}
public class ViaplayItem
{
  public string Title { get; set; }
  public string Synopsis { get; set; }
  public double Seasons { get; set; }
  public string Href { get; set; }
}