138 lines
4.7 KiB
C++
138 lines
4.7 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2019
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include "td/telegram/Client.h"
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#include "td/telegram/TdDotNetApi.h"
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#include "td/utils/port/CxCli.h"
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#include <cstdint>
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namespace Telegram {
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namespace Td {
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using namespace CxCli;
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/// <summary>
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/// Interface for handler for results of queries to TDLib and incoming updates from TDLib.
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/// </summary>
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public interface class ClientResultHandler {
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/// <summary>
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/// Callback called on result of query to TDLib or incoming update from TDLib.
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/// </summary>
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/// <param name="object">Result of query or update of type Telegram.Td.Api.Update about new events.</param>
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void OnResult(Api::BaseObject^ object);
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};
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/// <summary>
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/// Main class for interaction with the TDLib.
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/// </summary>
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public ref class Client sealed {
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public:
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/// <summary>
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/// Sends a request to the TDLib.
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/// </summary>
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/// <param name="function">Object representing a query to the TDLib.</param>
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/// <param name="handler">Result handler with OnResult method which will be called with result
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/// of the query or with Telegram.Td.Api.Error as parameter. If it is null, nothing will be called.</param>
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/// <exception cref="NullReferenceException">Thrown when query is null.</exception>
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void Send(Api::Function^ function, ClientResultHandler^ handler) {
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if (function == nullptr) {
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throw REF_NEW NullReferenceException("Function can't be null");
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}
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std::uint64_t queryId = Increment(currentId);
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if (handler != nullptr) {
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handlers[queryId] = handler;
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}
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td::Client::Request request;
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request.id = queryId;
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request.function = td::td_api::move_object_as<td::td_api::Function>(ToUnmanaged(function)->get_object_ptr());
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client->send(std::move(request));
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}
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/// <summary>
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/// Synchronously executes a TDLib request. Only a few marked accordingly requests can be executed synchronously.
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/// </summary>
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/// <param name="function">Object representing a query to the TDLib.</param>
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/// <returns>Returns request result.</returns>
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/// <exception cref="NullReferenceException">Thrown when query is null.</exception>
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static Api::BaseObject^ Execute(Api::Function^ function) {
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if (function == nullptr) {
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throw REF_NEW NullReferenceException("Function can't be null");
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}
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td::Client::Request request;
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request.id = 0;
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request.function = td::td_api::move_object_as<td::td_api::Function>(ToUnmanaged(function)->get_object_ptr());
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return Api::FromUnmanaged(*td::Client::execute(std::move(request)).object);
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}
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/// <summary>
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/// Replaces handler for incoming updates from the TDLib.
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/// </summary>
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/// <param name="updatesHandler">Handler with OnResult method which will be called for every incoming update from the TDLib.</param>
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void SetUpdatesHandler(ClientResultHandler^ updatesHandler) {
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handlers[0] = updatesHandler;
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}
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/// <summary>
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/// Launches a cycle which will fetch all results of queries to TDLib and incoming updates from TDLib.
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/// Must be called once on a separate dedicated thread, on which all updates and query results will be handled.
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/// Returns only when TDLib instance is closed.
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/// </summary>
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void Run() {
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while (true) {
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auto response = client->receive(10.0);
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if (response.object != nullptr) {
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ProcessResult(response.id, Api::FromUnmanaged(*response.object));
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if (response.object->get_id() == td::td_api::updateAuthorizationState::ID &&
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static_cast<td::td_api::updateAuthorizationState &>(*response.object).authorization_state_->get_id() ==
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td::td_api::authorizationStateClosed::ID) {
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break;
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}
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}
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}
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}
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/// <summary>
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/// Creates new Client.
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/// </summary>
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/// <param name="updatesHandler">Handler for incoming updates.</param>
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/// <returns>Returns created Client.</returns>
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static Client^ Create(ClientResultHandler^ updatesHandler) {
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return REF_NEW Client(updatesHandler);
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}
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private:
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Client(ClientResultHandler^ updatesHandler) {
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client = new td::Client();
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handlers[0] = updatesHandler;
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}
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~Client() {
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delete client;
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}
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std::int64_t currentId = 0;
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ConcurrentDictionary<std::uint64_t, ClientResultHandler^> handlers;
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td::Client *client = nullptr;
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void ProcessResult(std::uint64_t id, Api::BaseObject^ object) {
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ClientResultHandler^ handler;
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// update handler stays forever
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if (id == 0 ? handlers.TryGetValue(id, handler) : handlers.TryRemove(id, handler)) {
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// TODO try/catch
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handler->OnResult(object);
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}
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}
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};
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} // namespace Td
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} // namespace Telegram
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