MetalJesusBot

program.cs

using Google.Apis.Auth.OAuth2;
using Google.Apis.Services;
using Google.Apis.Util.Store;
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.Net;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace MetalJesusThumbnails
{
    class Program
    {
        static void Main(string[] args)
        {
            if (!File.Exists("client_secret.json"))
            {
                Console.WriteLine("You must add your Google OAUTH Client JSON! Download it, name it `client_secret.json` and put it in the base directory!");
                return;
            }
            var path = "videos";
            if (args.Length >= 1)
                path = args[0];

            UserCredential credential;
            using (FileStream stream = new FileStream("client_secret.json", FileMode.Open, FileAccess.Read))
            {
                credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
                    GoogleClientSecrets.Load(stream).Secrets,
                    new[] { YouTubeService.Scope.Youtube, YouTubeService.Scope.YoutubeForceSsl },
                    "user",
                    CancellationToken.None,
                    new FileDataStore("YouTube.Auth.Store")).Result;
            }

            var youtubeService = new YouTubeService(new BaseClientService.Initializer()
            {
                HttpClientInitializer = credential,
                ApplicationName = "MetalJesusBot"
            });

            var database = new Database();
            UpdateVideoDatabase(youtubeService, database);
            DownloadThumbnails(path, database);
        }

        static string CleanFileName(string fileName)
        {
            return Path.GetInvalidFileNameChars().Aggregate(fileName, (current, c) => current.Replace(c.ToString(), string.Empty));
        }

        static void DownloadThumbnails(string path, Database database)
        {
            Directory.CreateDirectory(path);
            using (var client = new WebClient())
            {

                foreach(var vid in database.GetVideos())
                {
                    var vidId = string.IsNullOrEmpty(vid.VideoId) ? CleanFileName(vid.Title) : vid.VideoId;
                    var filename = Path.Combine(path, $"{vidId}{Path.GetExtension(vid.ThumbnailUrl)}");
                    if (!File.Exists(filename))
                    {
                        Console.WriteLine($"Downloading: {filename}");
                        client.DownloadFile(vid.ThumbnailUrl, filename);
                    }
                }
            }
        }

        static void UpdateVideoDatabase(YouTubeService youtubeService, Database database)
        {
            Console.WriteLine("Checking for new videos...");
            var searchListRequest = youtubeService.Search.List("snippet");
            searchListRequest.MaxResults = 50;
            searchListRequest.ChannelId = "UCEFymXY4eFCo_AchSpxwyrg";
            var nextPageToken = "";
            var count = 0;
            while (true)
            {
                var oldVids = database.GetVideos().Select(n => n.VideoId);
                if (!string.IsNullOrEmpty(nextPageToken))
                    searchListRequest.PageToken = nextPageToken;
                var searchListResult = searchListRequest.Execute();

                var youtubeVids = searchListResult.Items.Select(n => new YoutubeVideo()
                {
                    ChannelId = n.Snippet.ChannelId,
                    ChannelTitle = n.Snippet.ChannelTitle,
                    Description = n.Snippet.Description,
                    ThumbnailUrl = GetThumbnailUrl(n.Snippet.Thumbnails),
                    Title = n.Snippet.Title,
                    VideoId = n.Id.VideoId,
                    PublishedDate = n.Snippet.PublishedAt.Value
                }).ToList();

                // Should be fresh list of videos.
                var list = youtubeVids.Where(n => !oldVids.Contains(n.VideoId)).ToList();
                var uploaded = database.UpsertVideos(list);
                count += uploaded;
                if (uploaded > 0)
                    Console.WriteLine($"Got {count} videos...");
                if (string.IsNullOrEmpty(searchListResult.NextPageToken))
                    break;
                nextPageToken = searchListResult.NextPageToken;
            }
        }

        static string GetThumbnailUrl(ThumbnailDetails deets)
        {
            if (deets.Maxres != null)
                return deets.Maxres.Url;

            if (deets.High != null)
                return deets.High.Url;

            if (deets.Medium != null)
                return deets.Medium.Url;

            if (deets.Standard != null)
                return deets.Standard.Url;

            return "";
        }
    }
}