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tdlight/td/telegram/CountryInfoManager.cpp

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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2024
//
// 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/CountryInfoManager.h"
#include "td/telegram/AuthManager.h"
#include "td/telegram/Global.h"
#include "td/telegram/LanguagePackManager.h"
#include "td/telegram/misc.h"
#include "td/telegram/OptionManager.h"
#include "td/telegram/Td.h"
#include "td/telegram/telegram_api.h"
#include "td/utils/algorithm.h"
#include "td/utils/base64.h"
#include "td/utils/buffer.h"
#include "td/utils/Gzip.h"
#include "td/utils/logging.h"
#include "td/utils/misc.h"
#include "td/utils/Random.h"
#include "td/utils/Time.h"
#include "td/utils/tl_parsers.h"
#include "td/utils/utf8.h"
namespace td {
class GetNearestDcQuery final : public Td::ResultHandler {
Promise<string> promise_;
public:
explicit GetNearestDcQuery(Promise<string> &&promise) : promise_(std::move(promise)) {
}
void send() {
send_query(G()->net_query_creator().create_unauth(telegram_api::help_getNearestDc()));
}
void on_result(BufferSlice packet) final {
auto result_ptr = fetch_result<telegram_api::help_getNearestDc>(packet);
if (result_ptr.is_error()) {
return on_error(result_ptr.move_as_error());
}
auto result = result_ptr.move_as_ok();
promise_.set_value(std::move(result->country_));
}
void on_error(Status status) final {
if (!G()->is_expected_error(status) && status.message() != "BOT_METHOD_INVALID") {
LOG(ERROR) << "GetNearestDc returned " << status;
}
promise_.set_error(std::move(status));
}
};
class GetCountriesListQuery final : public Td::ResultHandler {
Promise<tl_object_ptr<telegram_api::help_CountriesList>> promise_;
public:
explicit GetCountriesListQuery(Promise<tl_object_ptr<telegram_api::help_CountriesList>> &&promise)
: promise_(std::move(promise)) {
}
void send(const string &language_code, int32 hash) {
send_query(G()->net_query_creator().create_unauth(telegram_api::help_getCountriesList(language_code, hash)));
}
void on_result(BufferSlice packet) final {
// LOG(ERROR) << base64url_encode(gzencode(packet, 0.9));
auto result_ptr = fetch_result<telegram_api::help_getCountriesList>(packet);
if (result_ptr.is_error()) {
return on_error(result_ptr.move_as_error());
}
promise_.set_value(result_ptr.move_as_ok());
}
void on_error(Status status) final {
if (!G()->is_expected_error(status)) {
LOG(ERROR) << "GetCountriesList returned " << status;
}
promise_.set_error(std::move(status));
}
};
struct CountryInfoManager::CallingCodeInfo {
string calling_code;
vector<string> prefixes;
vector<string> patterns;
};
struct CountryInfoManager::CountryInfo {
string country_code;
string default_name;
string name;
vector<CallingCodeInfo> calling_codes;
bool is_hidden = false;
td_api::object_ptr<td_api::countryInfo> get_country_info_object() const {
return td_api::make_object<td_api::countryInfo>(
country_code, name.empty() ? default_name : name, default_name, is_hidden,
transform(calling_codes, [](const CallingCodeInfo &info) { return info.calling_code; }));
}
};
struct CountryInfoManager::CountryList {
vector<CountryInfo> countries;
int32 hash = 0;
double next_reload_time = 0.0;
td_api::object_ptr<td_api::countries> get_countries_object() const {
return td_api::make_object<td_api::countries>(
transform(countries, [](const CountryInfo &info) { return info.get_country_info_object(); }));
}
};
CountryInfoManager::CountryInfoManager(Td *td, ActorShared<> parent) : td_(td), parent_(std::move(parent)) {
on_update_fragment_prefixes();
}
CountryInfoManager::~CountryInfoManager() = default;
void CountryInfoManager::start_up() {
std::lock_guard<std::mutex> country_lock(country_mutex_);
manager_count_++;
}
void CountryInfoManager::tear_down() {
parent_.reset();
std::lock_guard<std::mutex> country_lock(country_mutex_);
manager_count_--;
if (manager_count_ == 0 && !countries_.empty()) {
LOG(INFO) << "Clear country info";
countries_.clear();
}
}
bool CountryInfoManager::is_fragment_phone_number(string phone_number) {
if (phone_number.empty()) {
return false;
}
if (fragment_prefixes_.empty()) {
fragment_prefixes_str_ = "888";
fragment_prefixes_.push_back(fragment_prefixes_str_);
}
clean_phone_number(phone_number);
for (auto &prefix : fragment_prefixes_) {
if (begins_with(phone_number, prefix)) {
return true;
}
}
return false;
}
void CountryInfoManager::on_update_fragment_prefixes() {
if (G()->close_flag()) {
return;
}
if (td_->auth_manager_->is_bot()) {
return;
}
if (!td_->option_manager_->have_option("fragment_prefixes")) {
return;
}
auto fragment_prefixes_str = td_->option_manager_->get_option_string("fragment_prefixes", "888");
std::lock_guard<std::mutex> country_lock(country_mutex_);
if (fragment_prefixes_str == fragment_prefixes_str_) {
return;
}
fragment_prefixes_str_ = std::move(fragment_prefixes_str);
fragment_prefixes_ = full_split(fragment_prefixes_str_, ',');
}
string CountryInfoManager::get_main_language_code() {
return to_lower(td_->language_pack_manager_.get_actor_unsafe()->get_main_language_code());
}
void CountryInfoManager::get_countries(Promise<td_api::object_ptr<td_api::countries>> &&promise) {
do_get_countries(get_main_language_code(), false, std::move(promise));
}
void CountryInfoManager::do_get_countries(string language_code, bool is_recursive,
Promise<td_api::object_ptr<td_api::countries>> &&promise) {
if (is_recursive) {
auto main_language_code = get_main_language_code();
if (language_code != main_language_code) {
language_code = std::move(main_language_code);
is_recursive = false;
}
}
{
std::lock_guard<std::mutex> country_lock(country_mutex_);
auto list = get_country_list(this, language_code);
if (list != nullptr) {
return promise.set_value(list->get_countries_object());
}
}
if (is_recursive) {
return promise.set_error(Status::Error(500, "Requested data is inaccessible"));
}
if (language_code.empty()) {
return promise.set_error(Status::Error(400, "Invalid language code specified"));
}
load_country_list(language_code, 0,
PromiseCreator::lambda([actor_id = actor_id(this), language_code,
promise = std::move(promise)](Result<Unit> &&result) mutable {
if (result.is_error()) {
return promise.set_error(result.move_as_error());
}
send_closure(actor_id, &CountryInfoManager::do_get_countries, std::move(language_code), true,
std::move(promise));
}));
}
void CountryInfoManager::get_phone_number_info(string phone_number_prefix,
Promise<td_api::object_ptr<td_api::phoneNumberInfo>> &&promise) {
clean_phone_number(phone_number_prefix);
if (phone_number_prefix.empty()) {
return promise.set_value(td_api::make_object<td_api::phoneNumberInfo>(nullptr, string(), string(), false));
}
do_get_phone_number_info(std::move(phone_number_prefix), get_main_language_code(), false, std::move(promise));
}
void CountryInfoManager::do_get_phone_number_info(string phone_number_prefix, string language_code, bool is_recursive,
Promise<td_api::object_ptr<td_api::phoneNumberInfo>> &&promise) {
if (is_recursive) {
auto main_language_code = get_main_language_code();
if (language_code != main_language_code) {
language_code = std::move(main_language_code);
is_recursive = false;
}
}
{
std::lock_guard<std::mutex> country_lock(country_mutex_);
auto list = get_country_list(this, language_code);
if (list != nullptr) {
return promise.set_value(get_phone_number_info_object(list, phone_number_prefix));
}
}
if (is_recursive) {
return promise.set_error(Status::Error(500, "Requested data is inaccessible"));
}
if (language_code.empty()) {
return promise.set_error(Status::Error(400, "Invalid language code specified"));
}
load_country_list(language_code, 0,
PromiseCreator::lambda([actor_id = actor_id(this), phone_number_prefix, language_code,
promise = std::move(promise)](Result<Unit> &&result) mutable {
if (result.is_error()) {
return promise.set_error(result.move_as_error());
}
send_closure(actor_id, &CountryInfoManager::do_get_phone_number_info,
std::move(phone_number_prefix), std::move(language_code), true, std::move(promise));
}));
}
td_api::object_ptr<td_api::phoneNumberInfo> CountryInfoManager::get_phone_number_info_sync(const string &language_code,
string phone_number_prefix) {
clean_phone_number(phone_number_prefix);
if (phone_number_prefix.empty()) {
return td_api::make_object<td_api::phoneNumberInfo>(nullptr, string(), string(), false);
}
std::lock_guard<std::mutex> country_lock(country_mutex_);
auto list = get_country_list(nullptr, language_code);
if (list == nullptr) {
list = get_country_list(nullptr, "en");
}
return get_phone_number_info_object(list, phone_number_prefix);
}
td_api::object_ptr<td_api::phoneNumberInfo> CountryInfoManager::get_phone_number_info_object(const CountryList *list,
Slice phone_number) {
CHECK(list != nullptr);
const CountryInfo *best_country = nullptr;
const CallingCodeInfo *best_calling_code = nullptr;
size_t best_length = 0;
bool is_prefix = false; // is phone number a prefix of a valid country_code + prefix
bool is_anonymous = is_fragment_phone_number(phone_number.str());
for (auto &country : list->countries) {
for (auto &calling_code : country.calling_codes) {
if (begins_with(phone_number, calling_code.calling_code)) {
auto calling_code_size = calling_code.calling_code.size();
for (auto &prefix : calling_code.prefixes) {
if (begins_with(prefix, phone_number.substr(calling_code_size))) {
is_prefix = true;
}
if (calling_code_size + prefix.size() > best_length &&
begins_with(phone_number.substr(calling_code_size), prefix)) {
best_country = &country;
best_calling_code = &calling_code;
best_length = calling_code_size + prefix.size();
}
}
}
if (begins_with(calling_code.calling_code, phone_number)) {
is_prefix = true;
}
}
}
if (best_country == nullptr) {
return td_api::make_object<td_api::phoneNumberInfo>(nullptr, is_prefix ? phone_number.str() : string(),
is_prefix ? string() : phone_number.str(), is_anonymous);
}
Slice formatted_part = phone_number.substr(best_calling_code->calling_code.size());
string formatted_phone_number;
size_t max_matched_digits = 0;
for (auto &pattern : best_calling_code->patterns) {
string result;
size_t current_pattern_pos = 0;
bool is_failed_match = false;
size_t matched_digits = 0;
for (auto &c : formatted_part) {
while (current_pattern_pos < pattern.size() && pattern[current_pattern_pos] != 'X' &&
!is_digit(pattern[current_pattern_pos])) {
result += pattern[current_pattern_pos++];
}
if (current_pattern_pos == pattern.size()) {
// result += ' ';
}
if (current_pattern_pos >= pattern.size() || pattern[current_pattern_pos] == 'X') {
result += c;
current_pattern_pos++;
} else {
CHECK(is_digit(pattern[current_pattern_pos]));
if (c == pattern[current_pattern_pos]) {
matched_digits++;
result += c;
current_pattern_pos++;
} else {
is_failed_match = true;
break;
}
}
}
for (size_t i = current_pattern_pos; i < pattern.size(); i++) {
if (is_digit(pattern[i])) {
is_failed_match = true;
}
}
if (!is_failed_match && matched_digits >= max_matched_digits) {
max_matched_digits = matched_digits;
while (current_pattern_pos < pattern.size()) {
if (pattern[current_pattern_pos] == 'X') {
result.push_back('-');
} else {
CHECK(!is_digit(pattern[current_pattern_pos]));
result.push_back(' ');
}
current_pattern_pos++;
}
formatted_phone_number = std::move(result);
}
}
return td_api::make_object<td_api::phoneNumberInfo>(
best_country->get_country_info_object(), best_calling_code->calling_code,
formatted_phone_number.empty() ? formatted_part.str() : formatted_phone_number, is_anonymous);
}
void CountryInfoManager::get_current_country_code(Promise<string> &&promise) {
td_->create_handler<GetNearestDcQuery>(std::move(promise))->send();
}
void CountryInfoManager::load_country_list(string language_code, int32 hash, Promise<Unit> &&promise) {
auto &queries = pending_load_country_queries_[language_code];
if (!promise && !queries.empty()) {
return;
}
queries.push_back(std::move(promise));
if (queries.size() == 1) {
auto query_promise = PromiseCreator::lambda(
[actor_id = actor_id(this), language_code](Result<tl_object_ptr<telegram_api::help_CountriesList>> &&result) {
send_closure(actor_id, &CountryInfoManager::on_get_country_list, language_code, std::move(result));
});
td_->create_handler<GetCountriesListQuery>(std::move(query_promise))->send(language_code, hash);
}
}
void CountryInfoManager::on_get_country_list(const string &language_code,
Result<tl_object_ptr<telegram_api::help_CountriesList>> r_country_list) {
auto query_it = pending_load_country_queries_.find(language_code);
CHECK(query_it != pending_load_country_queries_.end());
auto promises = std::move(query_it->second);
CHECK(!promises.empty());
pending_load_country_queries_.erase(query_it);
if (r_country_list.is_error()) {
{
std::lock_guard<std::mutex> country_lock(country_mutex_);
auto it = countries_.find(language_code);
if (it != countries_.end()) {
// don't try to reload countries more often than once in 1-2 minutes
it->second->next_reload_time = max(Time::now() + Random::fast(60, 120), it->second->next_reload_time);
// if we have data for the language, then we don't need to fail promises
set_promises(promises);
return;
}
}
fail_promises(promises, r_country_list.move_as_error());
return;
}
{
std::lock_guard<std::mutex> country_lock(country_mutex_);
on_get_country_list_impl(language_code, r_country_list.move_as_ok());
}
set_promises(promises);
}
void CountryInfoManager::on_get_country_list_impl(const string &language_code,
tl_object_ptr<telegram_api::help_CountriesList> country_list) {
CHECK(country_list != nullptr);
LOG(DEBUG) << "Receive " << to_string(country_list);
auto &countries = countries_[language_code];
switch (country_list->get_id()) {
case telegram_api::help_countriesListNotModified::ID:
if (countries == nullptr) {
LOG(ERROR) << "Receive countriesListNotModified for unknown list with language code " << language_code;
countries_.erase(language_code);
} else {
LOG(INFO) << "List of countries with language code " << language_code << " is not modified";
countries->next_reload_time = Time::now() + Random::fast(86400, 2 * 86400);
}
break;
case telegram_api::help_countriesList::ID: {
auto list = move_tl_object_as<telegram_api::help_countriesList>(country_list);
if (countries == nullptr) {
countries = make_unique<CountryList>();
} else {
countries->countries.clear();
}
for (auto &c : list->countries_) {
CountryInfo info;
info.country_code = std::move(c->iso2_);
info.default_name = std::move(c->default_name_);
info.name = std::move(c->name_);
info.is_hidden = c->hidden_;
for (auto &code : c->country_codes_) {
auto r_calling_code = to_integer_safe<int32>(code->country_code_);
if (r_calling_code.is_error() || r_calling_code.ok() <= 0) {
LOG(ERROR) << "Receive invalid calling code " << code->country_code_ << " for country "
<< info.country_code;
} else {
CallingCodeInfo calling_code_info;
calling_code_info.calling_code = std::move(code->country_code_);
calling_code_info.prefixes = std::move(code->prefixes_);
if (calling_code_info.prefixes.empty()) {
calling_code_info.prefixes.resize(1);
}
calling_code_info.patterns = std::move(code->patterns_);
info.calling_codes.push_back(std::move(calling_code_info));
}
}
if (info.calling_codes.empty()) {
LOG(ERROR) << "Receive empty list of calling codes for " << info.country_code;
continue;
}
countries->countries.push_back(std::move(info));
}
countries->hash = list->hash_;
countries->next_reload_time = Time::now() + Random::fast(86400, 2 * 86400);
break;
}
default:
UNREACHABLE();
}
}
const CountryInfoManager::CountryList *CountryInfoManager::get_country_list(CountryInfoManager *manager,
const string &language_code) {
auto it = countries_.find(language_code);
if (it == countries_.end()) {
if (language_code == "en") {
static const BufferSlice en = gzdecode(
base64url_decode(
"eJyNW81y40hyrib13-qe6d3ZWR8cE4xwxHod4dkg8UfgyH9RJCg2AervViRryBqBgAYEpKVeYG8--AH2sgfHHnyzn6Dtky9-Ar-"
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.ok());
TlBufferParser parser(&en);
auto result = telegram_api::help_getCountriesList::fetch_result(parser);
parser.fetch_end();
CHECK(parser.get_error() == nullptr);
on_get_country_list_impl(language_code, std::move(result));
it = countries_.find(language_code);
CHECK(it != countries_.end());
auto *country = it->second.get();
if (manager != nullptr) {
manager->load_country_list(language_code, country->hash, Auto());
}
return country;
}
return nullptr;
}
auto *country = it->second.get();
CHECK(country != nullptr);
if (manager != nullptr && country->next_reload_time < Time::now()) {
manager->load_country_list(language_code, country->hash, Auto());
}
return country;
}
string CountryInfoManager::get_country_flag_emoji(const string &country_code) {
if (country_code.size() != 2 || !is_alpha(country_code[0]) || !is_alpha(country_code[1])) {
return string();
}
char first = to_upper(country_code[0]);
char second = to_upper(country_code[1]);
if (first == 'Y' && second == 'L') {
return string();
}
if (first == 'F' && second == 'T') {
return "\xF0\x9F\x8F\xB4\xE2\x80\x8D\xE2\x98\xA0\xEF\xB8\x8F"; // pirate flag
}
if (first == 'X' && second == 'G') {
return "\xF0\x9F\x9B\xB0"; // satellite
}
if (first == 'X' && second == 'V') {
return "\xF0\x9F\x8C\x8D"; // globe showing Europe-Africa
}
string result;
result.reserve(8);
append_utf8_character(result, 0x1F1A5 + first);
append_utf8_character(result, 0x1F1A5 + second);
CHECK(result.size() == 8);
return result;
}
int32 CountryInfoManager::manager_count_ = 0;
std::mutex CountryInfoManager::country_mutex_;
FlatHashMap<string, unique_ptr<CountryInfoManager::CountryList>> CountryInfoManager::countries_;
string CountryInfoManager::fragment_prefixes_str_;
vector<string> CountryInfoManager::fragment_prefixes_;
void CountryInfoManager::memory_stats(vector<string> &output) {
output.emplace_back("\"pending_load_country_queries_\":"); output.emplace_back(std::to_string(this->pending_load_country_queries_.size()));
}
} // namespace td
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