FoxTube/FoxTube.Background/BackgroundProcessor.cs

using Google.Apis.Auth.OAuth2;
using Google.Apis.Services;
using Google.Apis.YouTube.v3;
using Google.Apis.YouTube.v3.Data;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Xml;
using Windows.ApplicationModel.Background;
using Windows.Storage;
using Windows.UI.Notifications;

namespace FoxTube.Background
{
    public sealed class BackgroundProcessor : IBackgroundTask
    {
        private DateTime lastCheck = DateTime.Now;

        private ApplicationDataContainer settings = ApplicationData.Current.LocalSettings;

        private ClientSecrets Secrets => new ClientSecrets()
        {
            ClientId = "349735264870-2ekqlm0a4mkg3mmrfcv90s3qp3o15dq0.apps.googleusercontent.com",
            ClientSecret = "BkVZOAaCU2Zclf0Zlicg6y2_"
        };
        private YouTubeService Service => new YouTubeService(new BaseClientService.Initializer()
        {
            ApiKey = "AIzaSyBgHrCnrlzlVmk0cJKL8RqP9Y8x6XSuk_0",
            ApplicationName = "FoxTube"
        });
        BackgroundTaskDeferral def;

        public void Run(IBackgroundTaskInstance taskInstance)
        {
            def = taskInstance.GetDeferral();
            if (settings.Values["lastCheck"] == null)
                settings.Values.Add("lastCheck", XmlConvert.ToString(DateTime.Now, "YYYY-MM-DDThh:mm:ss"));
            else lastCheck = XmlConvert.ToDateTime(settings.Values["lastCheck"] as string, XmlDateTimeSerializationMode.Unspecified);
            
            if((bool)settings.Values["newVideoNotification"])
                CheckAnnouncements();
            if((bool)settings.Values["devNews"])
                CheckAccount();

            settings.Values["lastCheck"] = XmlConvert.ToString(DateTime.Now, "YYYY-MM-DDThh:mm:ss");

            def.Complete();
        }

        async void CheckAccount()
        {
            try
            {
                UserCredential credential = await GoogleWebAuthorizationBroker.AuthorizeAsync(Secrets, new[] { Google.Apis.Oauth2.v2.Oauth2Service.Scope.UserinfoProfile, YouTubeService.Scope.YoutubeForceSsl }, "user", CancellationToken.None);
                if (credential == null)
                    return;

                SubscriptionsResource.ListRequest subRequest = new YouTubeService(new BaseClientService.Initializer()
                {
                    HttpClientInitializer = credential,
                    ApplicationName = "FoxTube"
                }).Subscriptions.List("snippet");
                subRequest.Mine = true;
                subRequest.MaxResults = 50;
                SubscriptionListResponse subResponse = await subRequest.ExecuteAsync();
                Dictionary<string, string> subs = new Dictionary<string, string>();

                foreach (Subscription s in subResponse.Items)
                    subs.Add(s.Snippet.ResourceId.ChannelId, s.Snippet.Thumbnails.Standard.Url);

                string nextToken = subResponse.NextPageToken;
                while (nextToken != null)
                {
                    subRequest.PageToken = nextToken;
                    subResponse = await subRequest.ExecuteAsync();
                    nextToken = subResponse.NextPageToken;

                    foreach (Subscription s in subResponse.Items)
                        subs.Add(s.Snippet.ResourceId.ChannelId, s.Snippet.Thumbnails.Standard.Url);
                }

                foreach (var s in subs)
                {
                    SearchResource.ListRequest request = Service.Search.List("snippet");
                    request.PublishedAfter = lastCheck;
                    request.ChannelId = s.Key;
                    request.Type = "video";
                    request.MaxResults = 5;
                    SearchListResponse response = await request.ExecuteAsync();

                    foreach (var i in response.Items)
                        ToastNotificationManager.CreateToastNotifier().Show(
                            Notification.GetVideoToast(i.Id.VideoId, i.Snippet.ChannelId, i.Snippet.Title, i.Snippet.ChannelTitle, i.Snippet.Thumbnails.Medium.Url, s.Value));
                }
            }
            catch { }
        }

        void CheckAnnouncements()
        {
            try
            {
                XmlDocument doc = new XmlDocument();
                doc.Load(XmlReader.Create("http://foxgame.hol.es/foxtube-messages.xml"));
                if ((XmlConvert.ToDateTimeOffset((doc["posts"].FirstChild as XmlElement).GetAttribute("time"), "YYYY-MM-DDThh:mm:ss") - lastCheck.ToUniversalTime()).TotalSeconds > 0)
                    ToastNotificationManager.CreateToastNotifier().Show(
                        Notification.GetInternalToast(doc["posts"].FirstChild["id"].InnerText,
                        doc["posts"].FirstChild["header"].InnerText,
                        doc["posts"].FirstChild["content"].InnerText,
                        doc["posts"].FirstChild["thumbnail"].InnerText,
                        doc["posts"].FirstChild["avatar"].InnerText));
            }
            catch { }
        }
    }
}