ParseRestHelper

ParseRestHelper.cs

//-----------------------------------------------------------------------
// <copyright file="ParseRestHelper.cs" company="Sully Studios">
//     Copyright (c) Johnathon Sullinger. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------
namespace Lifestream.Data.Repository.ParseCloud
{
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Net.Http;
    using System.Threading.Tasks;

    /// <summary>
    /// Provides helper methods for interacting with the Parse Rest API
    /// </summary>
    public static class ParseRestHelper
    {
        /// <summary>
        /// The parse application header
        /// </summary>
        private static string parseAppHeader = "X-Parse-Application-Id";

        /// <summary>
        /// The parse rest header
        /// </summary>
        private static string parseRestHeader = "X-Parse-REST-API-Key";

        /// <summary>
        /// The parse application identifier
        /// </summary>
        private static string parseAppId = "SomeKey";

        /// <summary>
        /// The parse rest key
        /// </summary>
        private static string parseRestKey = "SomeOtherKey";

        /// <summary>
        /// Creates the HTTP client. 
        /// Adds the parse App Id and REST API keys by default, along with setting the content type to application/json
        /// </summary>
        /// <returns>Returns an HttpClient with the headers set to the AppId and Rest API key.</returns>
        public static HttpClient CreateHttpClient()
        {
            var httpClient = new HttpClient();
            httpClient.DefaultRequestHeaders.Add(parseAppHeader, parseAppId);
            httpClient.DefaultRequestHeaders.Add(parseRestHeader, parseRestKey);
            httpClient.DefaultRequestHeaders.Add("ContentType", "application/json");

            return httpClient;
        }

        /// <summary>
        /// Creates the HTTP client.
        /// Adds the parse App Id and REST API keys by default, along with setting the content type to application/json
        /// </summary>
        /// <param name="additionalHeaderData">Any additional header data.</param>
        /// <returns>
        /// Returns an HttpClient with the headers set to the AppId and Rest API key.
        /// </returns>
        public static HttpClient CreateHttpClient(params KeyValuePair<string, string>[] additionalHeaderData)
        {
            var httpClient = ParseRestHelper.CreateHttpClient();

            if (additionalHeaderData != null)
            {
                foreach (KeyValuePair<string, string> keyValue in additionalHeaderData)
                {
                    httpClient.DefaultRequestHeaders.Add(keyValue.Key, keyValue.Value);
                }
            }

            return httpClient;
        }

        public static async Task<HttpResponseMessage> PostAsync(HttpClient client, string path, string json)
        {
            // TODO: Change Content-Type: application/json to an enum value to support images and other content types.
            var content = new StringContent(json, System.Text.Encoding.UTF8, "application/json");
            string url = string.Format("https://api.parse.com/1/{0}", path);

            // Post the content to the server.
            return await client.PostAsync(new Uri(url), content);
        }

        public static async Task<HttpResponseMessage> GetAsync(HttpClient client, string path)
        {
            string url = string.Format("https://api.parse.com/1/{0}", path);
            return await client.GetAsync(new Uri(url));
        }

        public static async Task<HttpResponseMessage> GetAsync(HttpClient client, string path, params KeyValuePair<string, string>[] parameters)
        {
            string parameter = string.Join("&", parameters.Select(p => string.Format("{0}={1}", p.Key, p.Value)));
            string url = string.Format("https://api.parse.com/1/{0}?{1}", path, parameter);

            return await client.GetAsync(new Uri(url));
        }
    }
}