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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2026
//
// 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/StateManager.h"
#include "td/telegram/Global.h"
#include "td/actor/PromiseFuture.h"
#include "td/actor/SleepActor.h"
#include "td/utils/logging.h"
#include "td/utils/Time.h"
namespace td {
void StateManager::on_synchronized(bool is_synchronized) {
if (sync_flag_ != is_synchronized) {
sync_flag_ = is_synchronized;
loop();
}
if (sync_flag_ && !was_sync_) {
was_sync_ = true;
set_promises(wait_first_sync_);
}
}
void StateManager::on_network_updated() {
do_on_network(network_type_, true /*inc_generation*/);
}
void StateManager::on_network(NetType new_network_type) {
do_on_network(new_network_type, true /*inc_generation*/);
}
void StateManager::do_on_network(NetType new_network_type, bool inc_generation) {
bool new_network_flag = new_network_type != NetType::None;
if (network_flag_ != new_network_flag) {
network_flag_ = new_network_flag;
loop();
}
network_type_ = new_network_type;
if (inc_generation) {
network_generation_++;
}
notify_flag(Flag::Network);
}
void StateManager::on_online(bool is_online) {
online_flag_ = is_online;
notify_flag(Flag::Online);
}
void StateManager::on_proxy(bool use_proxy) {
use_proxy_ = use_proxy;
on_network(network_type_);
loop();
}
void StateManager::on_logging_out(bool is_logging_out) {
is_logging_out_ = is_logging_out;
notify_flag(Flag::LoggingOut);
}
void StateManager::add_callback(unique_ptr<Callback> callback) {
if (callback->on_network(network_type_, network_generation_) && callback->on_online(online_flag_) &&
callback->on_state(get_real_state()) && callback->on_logging_out(is_logging_out_)) {
callbacks_.push_back(std::move(callback));
}
}
void StateManager::wait_first_sync(Promise<> promise) {
if (was_sync_) {
return promise.set_value(Unit());
}
wait_first_sync_.push_back(std::move(promise));
}
void StateManager::close() {
stop();
}
ConnectionState StateManager::get_real_state() const {
if (!network_flag_) {
return ConnectionState::WaitingForNetwork;
}
if (!connect_cnt_) {
if (use_proxy_ && !connect_proxy_cnt_) {
return ConnectionState::ConnectingToProxy;
}
return ConnectionState::Connecting;
}
if (!sync_flag_) {
return ConnectionState::Updating;
}
return ConnectionState::Ready;
}
void StateManager::notify_flag(Flag flag) {
for (auto it = callbacks_.begin(); it != callbacks_.end();) {
bool ok = [&] {
switch (flag) {
case Flag::Online:
return (*it)->on_online(online_flag_);
case Flag::State:
return (*it)->on_state(flush_state_);
case Flag::Network:
return (*it)->on_network(network_type_, network_generation_);
case Flag::LoggingOut:
return (*it)->on_logging_out(is_logging_out_);
default:
UNREACHABLE();
return true;
}
}();
if (ok) {
++it;
} else {
it = callbacks_.erase(it);
}
}
}
void StateManager::on_network_soft() {
if (network_type_ == NetType::Unknown) {
LOG(INFO) << "Auto set net_type = Other";
do_on_network(NetType::Other, false /*inc_generation*/);
}
}
void StateManager::start_up() {
if (!G()->get_option_boolean("disable_network_statistics")) {
create_actor<SleepActor>("SleepActor", 1, create_event_promise(self_closure(this, &StateManager::on_network_soft)))
.release();
}
loop();
}
void StateManager::loop() {
auto now = Time::now();
auto state = get_real_state();
if (state != pending_state_) {
pending_state_ = state;
if (!has_timestamp_) {
pending_timestamp_ = now;
has_timestamp_ = true;
}
}
if (pending_state_ != flush_state_) {
double delay = 0;
if (flush_state_ != ConnectionState::Empty) {
if (static_cast<int32>(pending_state_) > static_cast<int32>(flush_state_)) {
delay = UP_DELAY;
} else {
delay = DOWN_DELAY;
}
if (network_type_ == NetType::Unknown) {
delay = 0;
}
}
CHECK(has_timestamp_);
if (now >= pending_timestamp_ + delay) {
has_timestamp_ = false;
flush_state_ = pending_state_;
notify_flag(Flag::State);
} else {
set_timeout_at(pending_timestamp_ + delay);
}
} else {
has_timestamp_ = false;
}
}
} // namespace td
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