Newsbot.Collector/Newsbot.Collector.Services/Jobs/DiscordNotificationJob.cs

using Newsbot.Collector.Database.Repositories;
using Newsbot.Collector.Domain.Interfaces;
using Newsbot.Collector.Domain.Models;
using Newsbot.Collector.Domain.Models.Config;
using Newsbot.Collector.Services.Notifications.Discord;
using Newtonsoft.Json.Linq;
using Serilog;

namespace Newsbot.Collector.Services.Jobs;

public class DiscordNotificationJobOptions
{
    public string? ConnectionString { get; init; }
    public string? OpenTelemetry { get; init; }
    public bool IsEnabled { get; init; }
}

public class DiscordNotificationJob
{
    private const string JobName = "DiscordNotifications";
    
    private IDiscordQueueRepository _queue;
    private IArticlesRepository _article;
    private IDiscordWebHooksRepository _webhook;
    private ISourcesRepository _sources;
    private ISubscriptionRepository _subs;
    private IIconsRepository _icons;
    private ILogger _logger;

    public DiscordNotificationJob()
    {
        _queue = new DiscordQueueTable("");
        _article = new ArticlesTable("");
        _webhook = new DiscordWebhooksTable("");
        _sources = new SourcesTable("");
        _subs = new SubscriptionsTable("");
        _icons = new IconsTable("");
        _logger = JobLogger.GetLogger("", JobName);
    }

    public void InitAndExecute(DiscordNotificationJobOptions options)
    {
        _queue = new DiscordQueueTable(options.ConnectionString ?? "");
        _article = new ArticlesTable(options.ConnectionString ?? "");
        _webhook = new DiscordWebhooksTable(options.ConnectionString ?? "");
        _sources = new SourcesTable(options.ConnectionString ?? "");
        _subs = new SubscriptionsTable(options.ConnectionString ?? "");
        _icons = new IconsTable(options.ConnectionString ?? "");

        _logger = JobLogger.GetLogger(options.OpenTelemetry ?? "", JobName);

        if (!options.IsEnabled)
        {
            _logger.Warning($"{JobName} - Going to exit because feature flag is off.");
            return;
        }
        
        _logger.Information($"{JobName} - Starting up the job.");
        Execute();
    }

    private void Execute()
    {
        //collect all the new requests
        var requests = _queue.List(25);

        foreach (var request in requests)
        {
            // Get all details on the article in the queue
            var articleDetails = _article.GetById(request.ArticleID);

            // Get the details of the source
            var sourceDetails = _sources.GetByID(articleDetails.SourceID);
            if (sourceDetails.ID == Guid.Empty)
            {
                _logger.Error($"{JobName} - Article ({articleDetails.ID}) was linked to a empty Source ID.  Removing from the queue");
                _queue.Delete(request.ID);
                continue;
            }

            var sourceIcon = _icons.GetBySourceId(sourceDetails.ID);

            // Find all the subscriptions for that source
            var allSubscriptions = _subs.ListBySourceID(sourceDetails.ID);

            foreach (var sub in allSubscriptions)
            {
                // find the discord webhooks we need to post to
                var discordDetails = _webhook.GetByID(sub.DiscordWebHookID);
                if (discordDetails.Enabled == false)
                {
                    continue;
                }

                var client = new DiscordWebhookClient(discordDetails.Url);
                try
                {
                    client.SendMessage(GenerateDiscordMessage(sourceDetails, articleDetails, sourceIcon));
                }
                catch (Exception e)
                {
                    _logger.Error($"Failed to post message to Discord. {e}");
                    continue;
                }

                Thread.Sleep(3000);
            }

            _queue.Delete(request.ID);
        }
    }

    public DiscordMessage GenerateDiscordMessage(SourceModel source, ArticlesModel article, IconModel icon)
    {
        var embed = new DiscordMessageEmbed
        {
            Title = article.Title,
            Color = DiscordMessageEmbedColors.Red,
            Description = article.Description,
            Author = new DiscordMessageEmbedAuthor
            {
                Name = article.AuthorName,
                IconUrl = icon.FileName
            },
            Footer = new DiscordMessageEmbedFooter
            {
                Text = "Brought to you by Newsbot",
            },
            Fields = new DiscordMessageEmbedField[]
            {
                new DiscordMessageEmbedField
                {
                    Name = "Link",
                    Value = article.URL,
                    Inline = false,
                }
            }
        };

        if (article.URL is not null && article.URL != "")
        {
            embed.Url = article.URL;
        }

        if (article.Thumbnail != "")
        {
            embed.Image = new DiscordMessageEmbedImage
            {
                Url = article.Thumbnail
            };
        }

        if (article.AuthorImage is not null && article.AuthorImage != "")
        {
            embed.Author.IconUrl = article.AuthorImage;
        }

        return new DiscordMessage
        {
            Embeds = new DiscordMessageEmbed[]
            {
                embed
            }
        };
    }
}