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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)
//
#pragma once
#include "td/tl/TlObject.h"
#include "td/utils/base64.h"
#include "td/utils/common.h"
#include "td/utils/format.h"
#include "td/utils/JsonBuilder.h"
#include "td/utils/misc.h"
#include "td/utils/Slice.h"
#include "td/utils/SliceBuilder.h"
#include "td/utils/Status.h"
#include "td/utils/TlDowncastHelper.h"
#include <type_traits>
namespace td {
struct JsonInt64 {
int64 value;
};
inline void to_json(JsonValueScope &jv, const JsonInt64 json_int64) {
jv << JsonString(PSLICE() << json_int64.value);
}
struct JsonVectorInt64 {
const vector<int64> &value;
};
inline void to_json(JsonValueScope &jv, const JsonVectorInt64 &vec) {
auto ja = jv.enter_array();
for (auto &value : vec.value) {
ja.enter_value() << ToJson(JsonInt64{value});
}
}
template <class T>
void to_json(JsonValueScope &jv, const tl_object_ptr<T> &value) {
if (value) {
to_json(jv, *value);
} else {
jv << JsonNull();
}
}
template <class T>
void to_json(JsonValueScope &jv, const vector<T> &v) {
auto ja = jv.enter_array();
for (auto &value : v) {
ja.enter_value() << ToJson(value);
}
}
inline Status from_json(int32 &to, JsonValue from) {
if (from.type() != JsonValue::Type::Number && from.type() != JsonValue::Type::String) {
if (from.type() == JsonValue::Type::Null) {
return Status::OK();
}
return Status::Error(PSLICE() << "Expected Number, but receive " << from.type());
}
Slice number = from.type() == JsonValue::Type::String ? from.get_string() : from.get_number();
TRY_RESULT_ASSIGN(to, to_integer_safe<int32>(number));
return Status::OK();
}
inline Status from_json(bool &to, JsonValue from) {
auto from_type = from.type();
if (from_type != JsonValue::Type::Boolean) {
if (from_type == JsonValue::Type::Null) {
return Status::OK();
}
int32 x = 0;
auto status = from_json(x, std::move(from));
if (status.is_ok()) {
to = x != 0;
return Status::OK();
}
return Status::Error(PSLICE() << "Expected Boolean, but receive " << from_type);
}
to = from.get_boolean();
return Status::OK();
}
inline Status from_json(int64 &to, JsonValue from) {
if (from.type() != JsonValue::Type::Number && from.type() != JsonValue::Type::String) {
if (from.type() == JsonValue::Type::Null) {
return Status::OK();
}
return Status::Error(PSLICE() << "Expected String or Number, but receive " << from.type());
}
Slice number = from.type() == JsonValue::Type::String ? from.get_string() : from.get_number();
TRY_RESULT_ASSIGN(to, to_integer_safe<int64>(number));
return Status::OK();
}
inline Status from_json(double &to, JsonValue from) {
if (from.type() != JsonValue::Type::Number) {
if (from.type() == JsonValue::Type::Null) {
return Status::OK();
}
return Status::Error(PSLICE() << "Expected Number, but receive " << from.type());
}
to = to_double(from.get_number());
return Status::OK();
}
inline Status from_json(string &to, JsonValue from) {
if (from.type() != JsonValue::Type::String) {
if (from.type() == JsonValue::Type::Null) {
return Status::OK();
}
return Status::Error(PSLICE() << "Expected String, but receive " << from.type());
}
to = from.get_string().str();
return Status::OK();
}
inline Status from_json_bytes(string &to, JsonValue from) {
if (from.type() != JsonValue::Type::String) {
if (from.type() == JsonValue::Type::Null) {
return Status::OK();
}
return Status::Error(PSLICE() << "Expected String, but receive " << from.type());
}
TRY_RESULT_ASSIGN(to, base64_decode(from.get_string()));
return Status::OK();
}
template <class T>
Status from_json(vector<T> &to, JsonValue from) {
if (from.type() != JsonValue::Type::Array) {
if (from.type() == JsonValue::Type::Null) {
return Status::OK();
}
return Status::Error(PSLICE() << "Expected Array, but receive " << from.type());
}
to = vector<T>(from.get_array().size());
size_t i = 0;
for (auto &value : from.get_array()) {
TRY_STATUS(from_json(to[i], std::move(value)));
i++;
}
return Status::OK();
}
inline Status from_json_bytes(vector<string> &to, JsonValue from) {
if (from.type() != JsonValue::Type::Array) {
if (from.type() == JsonValue::Type::Null) {
return Status::OK();
}
return Status::Error(PSLICE() << "Expected Array, but receive " << from.type());
}
to = vector<string>(from.get_array().size());
size_t i = 0;
for (auto &value : from.get_array()) {
TRY_STATUS(from_json_bytes(to[i], std::move(value)));
i++;
}
return Status::OK();
}
template <class T>
std::enable_if_t<!std::is_constructible<T>::value, Status> from_json(tl_object_ptr<T> &to, JsonValue from) {
if (from.type() != JsonValue::Type::Object) {
if (from.type() == JsonValue::Type::Null) {
to = nullptr;
return Status::OK();
}
return Status::Error(PSLICE() << "Expected Object, but receive " << from.type());
}
auto &object = from.get_object();
TRY_RESULT(constructor_value, object.extract_required_field("@type", JsonValue::Type::Null));
int32 constructor = 0;
if (constructor_value.type() == JsonValue::Type::Number) {
constructor = to_integer<int32>(constructor_value.get_number());
} else if (constructor_value.type() == JsonValue::Type::String) {
TRY_RESULT_ASSIGN(constructor, tl_constructor_from_string(to.get(), constructor_value.get_string().str()));
} else {
return Status::Error(PSLICE() << "Expected String or Integer, but receive " << constructor_value.type());
}
TlDowncastHelper<T> helper(constructor);
Status status;
bool ok = downcast_call(static_cast<T &>(helper), [&](auto &dummy) {
auto result = make_tl_object<std::decay_t<decltype(dummy)>>();
status = from_json(*result, object);
to = std::move(result);
});
TRY_STATUS(std::move(status));
if (!ok) {
return Status::Error(PSLICE() << "Unknown constructor " << format::as_hex(constructor));
}
return Status::OK();
}
template <class T>
std::enable_if_t<std::is_constructible<T>::value, Status> from_json(tl_object_ptr<T> &to, JsonValue from) {
if (from.type() != JsonValue::Type::Object) {
if (from.type() == JsonValue::Type::Null) {
to = nullptr;
return Status::OK();
}
return Status::Error(PSLICE() << "Expected Object, but receive " << from.type());
}
to = make_tl_object<T>();
return from_json(*to, from.get_object());
}
} // namespace td
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