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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2025
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#include "td/telegram/CommonDialogManager.h"
#include "td/telegram/ChatManager.h"
#include "td/telegram/DialogManager.h"
#include "td/telegram/Global.h"
#include "td/telegram/Td.h"
#include "td/telegram/telegram_api.h"
#include "td/telegram/UserManager.h"
#include "td/utils/algorithm.h"
#include "td/utils/buffer.h"
#include "td/utils/logging.h"
#include "td/utils/misc.h"
#include "td/utils/Status.h"
#include "td/utils/Time.h"
#include <algorithm>
namespace td {
class GetCommonDialogsQuery final : public Td::ResultHandler {
Promise<Unit> promise_;
UserId user_id_;
int64 offset_chat_id_ = 0;
public:
explicit GetCommonDialogsQuery(Promise<Unit> &&promise) : promise_(std::move(promise)) {
}
void send(UserId user_id, tl_object_ptr<telegram_api::InputUser> &&input_user, int64 offset_chat_id, int32 limit) {
user_id_ = user_id;
offset_chat_id_ = offset_chat_id;
send_query(G()->net_query_creator().create(
telegram_api::messages_getCommonChats(std::move(input_user), offset_chat_id, limit)));
}
void on_result(BufferSlice packet) final {
auto result_ptr = fetch_result<telegram_api::messages_getCommonChats>(packet);
if (result_ptr.is_error()) {
return on_error(result_ptr.move_as_error());
}
auto chats_ptr = result_ptr.move_as_ok();
LOG(INFO) << "Receive result for GetCommonDialogsQuery: " << to_string(chats_ptr);
switch (chats_ptr->get_id()) {
case telegram_api::messages_chats::ID: {
auto chats = move_tl_object_as<telegram_api::messages_chats>(chats_ptr);
td_->common_dialog_manager_->on_get_common_dialogs(user_id_, offset_chat_id_, std::move(chats->chats_),
narrow_cast<int32>(chats->chats_.size()));
break;
}
case telegram_api::messages_chatsSlice::ID: {
auto chats = move_tl_object_as<telegram_api::messages_chatsSlice>(chats_ptr);
td_->common_dialog_manager_->on_get_common_dialogs(user_id_, offset_chat_id_, std::move(chats->chats_),
chats->count_);
break;
}
default:
UNREACHABLE();
}
promise_.set_value(Unit());
}
void on_error(Status status) final {
promise_.set_error(std::move(status));
}
};
CommonDialogManager::CommonDialogManager(Td *td, ActorShared<> parent) : td_(td), parent_(std::move(parent)) {
}
CommonDialogManager::~CommonDialogManager() {
Scheduler::instance()->destroy_on_scheduler(G()->get_gc_scheduler_id(), found_common_dialogs_);
}
void CommonDialogManager::tear_down() {
parent_.reset();
}
void CommonDialogManager::drop_common_dialogs_cache(UserId user_id) {
auto it = found_common_dialogs_.find(user_id);
if (it != found_common_dialogs_.end()) {
it->second.is_outdated = true;
}
}
std::pair<int32, vector<DialogId>> CommonDialogManager::get_common_dialogs(UserId user_id, DialogId offset_dialog_id,
int32 limit, bool force,
Promise<Unit> &&promise) {
auto r_input_user = td_->user_manager_->get_input_user(user_id);
if (r_input_user.is_error()) {
promise.set_error(r_input_user.move_as_error());
return {};
}
if (user_id == td_->user_manager_->get_my_id()) {
promise.set_error(Status::Error(400, "Can't get common chats with self"));
return {};
}
if (limit <= 0) {
promise.set_error(Status::Error(400, "Parameter limit must be positive"));
return {};
}
if (limit > MAX_GET_DIALOGS) {
limit = MAX_GET_DIALOGS;
}
int64 offset_chat_id = 0;
switch (offset_dialog_id.get_type()) {
case DialogType::Chat:
offset_chat_id = offset_dialog_id.get_chat_id().get();
break;
case DialogType::Channel:
offset_chat_id = offset_dialog_id.get_channel_id().get();
break;
case DialogType::None:
if (offset_dialog_id == DialogId()) {
break;
}
// fallthrough
case DialogType::User:
case DialogType::SecretChat:
promise.set_error(Status::Error(400, "Wrong offset_chat_id"));
return {};
default:
UNREACHABLE();
break;
}
auto it = found_common_dialogs_.find(user_id);
if (it != found_common_dialogs_.end() && !it->second.dialog_ids.empty()) {
int32 total_count = it->second.total_count;
vector<DialogId> &common_dialog_ids = it->second.dialog_ids;
bool use_cache = (!it->second.is_outdated && it->second.receive_time >= Time::now() - 3600) || force ||
offset_chat_id != 0 || common_dialog_ids.size() >= static_cast<size_t>(MAX_GET_DIALOGS);
// use cache if it is up-to-date, or we required to use it or we can't update it
if (use_cache) {
auto offset_it = common_dialog_ids.begin();
if (offset_dialog_id != DialogId()) {
offset_it = std::find(common_dialog_ids.begin(), common_dialog_ids.end(), offset_dialog_id);
if (offset_it == common_dialog_ids.end()) {
promise.set_error(Status::Error(400, "Wrong offset_chat_id"));
return {};
}
++offset_it;
}
vector<DialogId> result;
while (result.size() < static_cast<size_t>(limit)) {
if (offset_it == common_dialog_ids.end()) {
break;
}
auto dialog_id = *offset_it++;
if (dialog_id == DialogId()) { // end of the list
promise.set_value(Unit());
return {total_count, std::move(result)};
}
result.push_back(dialog_id);
}
if (result.size() == static_cast<size_t>(limit) || force) {
promise.set_value(Unit());
return {total_count, std::move(result)};
}
}
}
td_->create_handler<GetCommonDialogsQuery>(std::move(promise))
->send(user_id, r_input_user.move_as_ok(), offset_chat_id, MAX_GET_DIALOGS);
return {};
}
void CommonDialogManager::on_get_common_dialogs(UserId user_id, int64 offset_chat_id,
vector<tl_object_ptr<telegram_api::Chat>> &&chats, int32 total_count) {
CHECK(user_id.is_valid());
td_->user_manager_->on_update_user_common_chat_count(user_id, total_count);
auto &common_dialogs = found_common_dialogs_[user_id];
if (common_dialogs.is_outdated && offset_chat_id == 0 &&
common_dialogs.dialog_ids.size() < static_cast<size_t>(MAX_GET_DIALOGS)) {
// drop outdated cache if possible
common_dialogs = CommonDialogs();
}
if (common_dialogs.receive_time == 0) {
common_dialogs.receive_time = Time::now();
}
common_dialogs.is_outdated = false;
auto &result = common_dialogs.dialog_ids;
if (!result.empty() && result.back() == DialogId()) {
return;
}
bool is_last = chats.empty() && offset_chat_id == 0;
for (auto &chat : chats) {
auto dialog_id = ChatManager::get_dialog_id(chat);
if (!dialog_id.is_valid()) {
LOG(ERROR) << "Receive invalid " << to_string(chat);
continue;
}
td_->chat_manager_->on_get_chat(std::move(chat), "on_get_common_dialogs");
if (!td::contains(result, dialog_id)) {
td_->dialog_manager_->force_create_dialog(dialog_id, "get common dialogs");
result.push_back(dialog_id);
}
}
if (result.size() >= static_cast<size_t>(total_count) || is_last) {
if (result.size() != static_cast<size_t>(total_count)) {
LOG(ERROR) << "Fix total count of common groups with " << user_id << " from " << total_count << " to "
<< result.size();
total_count = narrow_cast<int32>(result.size());
td_->user_manager_->on_update_user_common_chat_count(user_id, total_count);
}
result.emplace_back();
}
common_dialogs.total_count = total_count;
}
} // namespace td
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