DocSpace-buildtools/common/services/ASC.Notify/DbWorker.cs

/*
 *
 * (c) Copyright Ascensio System Limited 2010-2018
 *
 * This program is freeware. You can redistribute it and/or modify it under the terms of the GNU 
 * General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html). 
 * In accordance with Section 7(a) of the GNU GPL its Section 15 shall be amended to the effect that 
 * Ascensio System SIA expressly excludes the warranty of non-infringement of any third-party rights.
 *
 * THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR
 * FITNESS FOR A PARTICULAR PURPOSE. For more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
 *
 * You can contact Ascensio System SIA by email at sales@onlyoffice.com
 *
 * The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display 
 * Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
 *
 * Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains 
 * relevant author attributions when distributing the software. If the display of the logo in its graphic 
 * form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE" 
 * in every copy of the program you distribute. 
 * Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
 *
*/

namespace ASC.Notify;

[Singletone(Additional = typeof(DbWorkerExtension))]
public class DbWorker
{
    private readonly string _dbid;
    private readonly object _syncRoot = new object();

    private readonly IServiceScopeFactory _serviceScopeFactory;
    public NotifyServiceCfg NotifyServiceCfg { get; }

    public DbWorker(IServiceScopeFactory serviceScopeFactory, IOptions<NotifyServiceCfg> notifyServiceCfg)
    {
        _serviceScopeFactory = serviceScopeFactory;
        NotifyServiceCfg = notifyServiceCfg.Value;
        _dbid = NotifyServiceCfg.ConnectionStringName;
    }

    public int SaveMessage(NotifyMessage m)
    {
        using var scope = _serviceScopeFactory.CreateScope();
        using var dbContext = scope.ServiceProvider.GetService<DbContextManager<NotifyDbContext>>().Get(_dbid);
        using var tx = dbContext.Database.BeginTransaction(IsolationLevel.ReadCommitted);

        var notifyQueue = new NotifyQueue
        {
            NotifyId = 0,
            TenantId = m.TenantId,
            Sender = m.Sender,
            Reciever = m.Reciever,
            Subject = m.Subject,
            ContentType = m.ContentType,
            Content = m.Content,
            SenderType = m.SenderType,
            CreationDate = new DateTime(m.CreationDate),
            ReplyTo = m.ReplyTo,
            Attachments = m.Attachments.ToString(),
            AutoSubmitted = m.AutoSubmitted
        };

        notifyQueue = dbContext.NotifyQueue.Add(notifyQueue).Entity;
        dbContext.SaveChanges();

        var id = notifyQueue.NotifyId;

        var info = new NotifyInfo
        {
            NotifyId = id,
            State = 0,
            Attempts = 0,
            ModifyDate = DateTime.UtcNow,
            Priority = m.Priority
        };

        dbContext.NotifyInfo.Add(info);
        dbContext.SaveChanges();

        tx.Commit();

        return 1;
    }

    public IDictionary<int, NotifyMessage> GetMessages(int count)
    {
        lock (_syncRoot)
        {
            using var scope = _serviceScopeFactory.CreateScope();
            using var dbContext = scope.ServiceProvider.GetService<DbContextManager<NotifyDbContext>>().Get(_dbid);
            using var tx = dbContext.Database.BeginTransaction();

            var q = dbContext.NotifyQueue
                .Join(dbContext.NotifyInfo, r => r.NotifyId, r => r.NotifyId, (queue, info) => new { queue, info })
                .Where(r => r.info.State == (int)MailSendingState.NotSended || r.info.State == (int)MailSendingState.Error && r.info.ModifyDate < DateTime.UtcNow - TimeSpan.Parse(NotifyServiceCfg.Process.AttemptsInterval))
                .OrderBy(i => i.info.Priority)
                .ThenBy(i => i.info.NotifyId)
                .Take(count);


            var messages = q
                .ToDictionary(
                    r => r.queue.NotifyId,
                    r =>
                    {
                        var res = new NotifyMessage
                        {
                            TenantId = r.queue.TenantId,
                            Sender = r.queue.Sender,
                            Reciever = r.queue.Reciever,
                            Subject = r.queue.Subject,
                            ContentType = r.queue.ContentType,
                            Content = r.queue.Content,
                            SenderType = r.queue.SenderType,
                            CreationDate = r.queue.CreationDate.Ticks,
                            ReplyTo = r.queue.ReplyTo,
                            AutoSubmitted = r.queue.AutoSubmitted
                        };
                        try
                        {
                            res.Attachments.AddRange(JsonConvert.DeserializeObject<RepeatedField<NotifyMessageAttachment>>(r.queue.Attachments));
                        }
                        catch (Exception)
                        {

                        }
                        return res;
                    });

            var info = dbContext.NotifyInfo.Where(r => messages.Keys.Any(a => a == r.NotifyId)).ToList();

            foreach (var i in info)
            {
                i.State = (int)MailSendingState.Sending;
            }

            dbContext.SaveChanges();
            tx.Commit();

            return messages;
        }
    }

    public void ResetStates()
    {
        using var scope = _serviceScopeFactory.CreateScope();
        using var dbContext = scope.ServiceProvider.GetService<DbContextManager<NotifyDbContext>>().Get(_dbid);

        var tr = dbContext.Database.BeginTransaction();
        var info = dbContext.NotifyInfo.Where(r => r.State == 1).ToList();

        foreach (var i in info)
        {
            i.State = 0;
        }

        dbContext.SaveChanges();
        tr.Commit();
    }

    public void SetState(int id, MailSendingState result)
    {
        using var scope = _serviceScopeFactory.CreateScope();
        using var dbContext = scope.ServiceProvider.GetService<DbContextManager<NotifyDbContext>>().Get(_dbid);
        using var tx = dbContext.Database.BeginTransaction();

        if (result == MailSendingState.Sended)
        {
            var d = dbContext.NotifyInfo.Where(r => r.NotifyId == id).FirstOrDefault();
            dbContext.NotifyInfo.Remove(d);
            dbContext.SaveChanges();
        }
        else
        {
            if (result == MailSendingState.Error)
            {
                var attempts = dbContext.NotifyInfo.Where(r => r.NotifyId == id).Select(r => r.Attempts).FirstOrDefault();
                if (NotifyServiceCfg.Process.MaxAttempts <= attempts + 1)
                {
                    result = MailSendingState.FatalError;
                }
            }

            var info = dbContext.NotifyInfo
                .Where(r => r.NotifyId == id)
                .ToList();

            foreach (var i in info)
            {
                i.State = (int)result;
                i.Attempts += 1;
                i.ModifyDate = DateTime.UtcNow;
            }

            dbContext.SaveChanges();
        }

        tx.Commit();
    }
}

public static class DbWorkerExtension
{
    public static void Register(DIHelper services)
    {
        services.TryAdd<DbContextManager<NotifyDbContext>>();
    }
}