using System;

using System.Net.Http;

using System.Threading.Tasks;

using System.Collections.Generic;

using Newtonsoft.Json;

​

/// <summary>

/// This class is a code snippet that demonstrates on how to make an OAuth code_flow token call 

/// </summary>

public class OAuthCodeFlow

{

    // Declaring flow constants

    const string GRANT_TYPE = "grant_type";

    const string CLIENT_ID = "client_id";

    const string REDIRECT_URI = "redirect_uri";

    const string CODE = "code";

    public static void Main(string[] args)

    {

        /*

        Calling the Async method and waiting for result 

        */

        AccessTokenResponse tokenResponse = GetToken().Result;

        var accessToken = tokenResponse.access_token;

        var refreshToken = tokenResponse.refresh_token;

        Console.WriteLine("Access Token : " + accessToken);

        Console.WriteLine("Refresh Token : " + refreshToken);

        UseToken(accessToken).Wait();

    }

​

    static async Task<AccessTokenResponse> GetToken()

    {

        using (var client = new HttpClient())

        {

            /*

            Setting up payload with redirectURI ,Client ID, and Auth Code (will be available in response of /authorise login call) 

            */

            string grantType = "authorization_code";

            string redirectUri = "{Redirect URI}"; 

            string clientId = "{Client ID}"; 

            string code = "{Auth Code}"; 

            string baseUrl = "https://development.coadjute.com/{partnerName}/";

            string tokenUrl = "token";

            /*

            Setting up HttpClient with Base URl, headers and payload

            */

            var formData = new[]{new KeyValuePair<string, string>(GRANT_TYPE, grantType), new KeyValuePair<string, string>(CLIENT_ID, clientId), new KeyValuePair<string, string>(REDIRECT_URI, redirectUri), new KeyValuePair<string, string>(CODE, code)};

            HttpContent content = new FormUrlEncodedContent(formData);

            var request = new HttpRequestMessage();

            request.RequestUri = new Uri(baseUrl + tokenUrl);

            request.Content = content;

            request.Method = HttpMethod.Post;

            /*

            Calling the POST token URL with payload and logging the response 

            */

            HttpResponseMessage response = await client.SendAsync(request); //Obtain access token from Authorization Server

            if (response.IsSuccessStatusCode)

            {

                var jsonString = response.Content.ReadAsStringAsync();

                jsonString.Wait();

                var tokenResponse = JsonConvert.DeserializeObject<AccessTokenResponse>(jsonString.Result);

                return tokenResponse;

                    }

            else

            {

                // Check for valid client id,redirect_url, code and URL  

                return null;

            }

        }

    }

​

    static async Task UseToken(string accessToken)

    {

        using (var client = new HttpClient())

        {

            /*

            Setting up URLs

            */

            string baseUrl = "https://development.coadjute.com/{partnerName}/"; 

            string tokenUrl = "employees";

            /*

            Setting up HttpClient with Base URl, headers and payload

            */

            client.DefaultRequestHeaders.Add("x-resource-version", "1.0.0");

            client.DefaultRequestHeaders.Add("Authorization", "Bearer " + accessToken);

            var request = new HttpRequestMessage();

            request.RequestUri = new Uri(baseUrl + tokenUrl);

            request.Method = HttpMethod.Get;

            /*

            Calling the API and logging the response 

            */

            HttpResponseMessage response = await client.SendAsync(request); //Obtain response from Coadjute Server

            if (response.IsSuccessStatusCode)

            {

                var jsonString = response.Content.ReadAsStringAsync();

                jsonString.Wait();

                Console.WriteLine("Employee Response : " + jsonString.Result);

            }

            else

            {

            // Check for valid token and URL  

            }

        }

    }

}

​

public class AccessTokenResponse

{

    public string access_token

    {

        get;

        set;

    }

​

    public string refresh_token

    {

        get;

        set;

    }

​

    public int expires_in

    {

        get;

        set;

    }

​

    public string token_type

    {

        get;

        set;

    }

}