246 lines
8.0 KiB
C#
246 lines
8.0 KiB
C#
// (c) Copyright Ascensio System SIA 2010-2022
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//
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// This program is a free software product.
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// You can redistribute it and/or modify it under the terms
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// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
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// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
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// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
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// any third-party rights.
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//
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// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For details, see
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// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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//
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// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
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//
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// The interactive user interfaces in modified source and object code versions of the Program must
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// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
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//
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// Pursuant to Section 7(b) of the License you must retain the original Product logo when
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// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
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// trademark law for use of our trademarks.
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//
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// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
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// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
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// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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namespace ASC.TelegramService;
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[Singletone(Additional = typeof(TelegramHandlerExtension))]
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public class TelegramHandler
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{
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private readonly Dictionary<int, TenantTgClient> _clients;
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private readonly CommandModule _command;
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private readonly ILogger<TelegramHandler> _log;
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private readonly IServiceScopeFactory _scopeFactory;
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private readonly IDistributedCache _distributedCache;
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public TelegramHandler(IDistributedCache distributedCache,
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CommandModule command,
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ILogger<TelegramHandler> logger,
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IServiceScopeFactory scopeFactory)
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{
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_command = command;
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_log = logger;
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_scopeFactory = scopeFactory;
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_clients = new Dictionary<int, TenantTgClient>();
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_distributedCache = distributedCache;
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ServicePointManager.SecurityProtocol |= SecurityProtocolType.Tls12 | SecurityProtocolType.Tls13;
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}
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public async Task SendMessage(NotifyMessage msg)
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{
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if (string.IsNullOrEmpty(msg.Reciever))
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{
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return;
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}
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if (!_clients.ContainsKey(msg.TenantId))
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{
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return;
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}
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var scope = _scopeFactory.CreateScope();
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var telegramDao = scope.ServiceProvider.GetService<TelegramDao>();
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var client = _clients[msg.TenantId].Client;
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try
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{
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var tgUser = telegramDao.GetUser(Guid.Parse(msg.Reciever), msg.TenantId);
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if (tgUser == null)
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{
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_log.DebugCouldntFind(msg.Reciever);
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return;
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}
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var chat = await client.GetChatAsync(tgUser.TelegramUserId);
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await client.SendTextMessageAsync(chat, msg.Content, ParseMode.MarkdownV2);
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}
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catch (Exception e)
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{
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_log.DebugCouldntSend(msg.Reciever, e);
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}
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}
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public void DisableClient(int tenantId)
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{
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if (!_clients.ContainsKey(tenantId))
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{
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return;
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}
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var client = _clients[tenantId];
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if (client.CancellationTokenSource != null)
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{
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client.CancellationTokenSource.Cancel();
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client.CancellationTokenSource.Dispose();
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client.CancellationTokenSource = null;
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}
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_clients.Remove(tenantId);
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}
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public void CreateOrUpdateClientForTenant(int tenantId, string token, int tokenLifespan, string proxy, bool startTelegramService, CancellationToken stoppingToken, bool force = false)
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{
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var scope = _scopeFactory.CreateScope();
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var telegramHelper = scope.ServiceProvider.GetService<TelegramHelper>();
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var newClient = telegramHelper.InitClient(token, proxy);
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if (_clients.TryGetValue(tenantId, out var client))
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{
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client.TokenLifeSpan = tokenLifespan;
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if (token != client.Token || proxy != client.Proxy)
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{
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if (startTelegramService)
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{
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if (!telegramHelper.TestingClient(newClient))
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{
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return;
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}
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}
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if (client.CancellationTokenSource != null)
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{
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client.CancellationTokenSource.Cancel();
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client.CancellationTokenSource.Dispose();
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client.CancellationTokenSource = null;
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}
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BindClient(newClient, tenantId, stoppingToken);
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client.Client = newClient;
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client.Token = token;
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client.Proxy = proxy;
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}
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}
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else
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{
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if (!force && startTelegramService)
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{
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if (!telegramHelper.TestingClient(newClient))
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{
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return;
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}
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}
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BindClient(newClient, tenantId, stoppingToken);
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_clients.Add(tenantId, new TenantTgClient()
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{
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Token = token,
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Client = newClient,
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Proxy = proxy,
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TenantId = tenantId,
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TokenLifeSpan = tokenLifespan
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});
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}
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}
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public void RegisterUser(string userId, int tenantId, string token)
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{
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if (!_clients.ContainsKey(tenantId))
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{
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return;
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}
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var userKey = UserKey(userId, tenantId);
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var dateExpires = DateTimeOffset.Now.AddMinutes(_clients[tenantId].TokenLifeSpan);
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_distributedCache.SetString(token, userKey, new DistributedCacheEntryOptions
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{
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AbsoluteExpiration = dateExpires
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});
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}
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private void BindClient(TelegramBotClient client, int tenantId, CancellationToken cancellationToken)
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{
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var cts = new CancellationTokenSource();
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_clients[tenantId].CancellationTokenSource = cts;
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var linkedCts = CancellationTokenSource.CreateLinkedTokenSource(cts.Token, cancellationToken);
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client.StartReceiving(updateHandler: (botClient, exception, cancellationToken) => HandleUpdateAsync(botClient, exception, cancellationToken, tenantId),
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errorHandler: HandleErrorAsync,
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cancellationToken: linkedCts.Token);
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}
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async Task HandleUpdateAsync(ITelegramBotClient botClient, Update update, CancellationToken cancellationToken, int tenantId)
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{
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if (update.Type != UpdateType.Message)
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{
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return;
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}
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if (update.Message.Type != MessageType.Text)
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{
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return;
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}
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if (String.IsNullOrEmpty(update.Message.Text) || update.Message.Text[0] != '/')
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{
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return;
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}
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await _command.HandleCommand(update.Message, botClient, tenantId);
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}
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Task HandleErrorAsync(ITelegramBotClient botClient, Exception exception, CancellationToken cancellationToken)
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{
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String errorMessage;
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if (exception is ApiRequestException)
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{
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errorMessage = String.Format("Telegram API Error:\n[{0}]\n{1}", ((ApiRequestException)exception).ErrorCode, ((ApiRequestException)exception).Message);
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}
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else
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{
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errorMessage = exception.ToString();
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}
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_log.Error(errorMessage);
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return Task.CompletedTask;
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}
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private string UserKey(string userId, int tenantId)
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{
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return string.Format("{0}:{1}", userId, tenantId);
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}
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}
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public static class TelegramHandlerExtension
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{
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public static void Register(DIHelper services)
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{
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services.TryAdd<TelegramHelper>();
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}
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}
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