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#include "node_io.h"
#include "node_builder.h"
#include "node_visitor.h"
#include <library/cpp/yson/json/json_writer.h>
#include <library/cpp/yson/parser.h>
#include <library/cpp/yson/writer.h>
#include <library/cpp/yson/json/yson2json_adapter.h>
#include <library/cpp/json/json_reader.h>
#include <library/cpp/json/json_value.h>
#include <util/generic/size_literals.h>
#include <util/stream/input.h>
#include <util/stream/output.h>
#include <util/stream/str.h>
#include <util/stream/mem.h>
namespace NYT {
static void WalkJsonTree(const NJson::TJsonValue& jsonValue, NJson::TJsonCallbacks* callbacks)
{
using namespace NJson;
switch (jsonValue.GetType()) {
case JSON_NULL:
callbacks->OnNull();
return;
case JSON_BOOLEAN:
callbacks->OnBoolean(jsonValue.GetBoolean());
return;
case JSON_INTEGER:
callbacks->OnInteger(jsonValue.GetInteger());
return;
case JSON_UINTEGER:
callbacks->OnUInteger(jsonValue.GetUInteger());
return;
case JSON_DOUBLE:
callbacks->OnDouble(jsonValue.GetDouble());
return;
case JSON_STRING:
callbacks->OnString(jsonValue.GetString());
return;
case JSON_MAP:
{
callbacks->OnOpenMap();
for (const auto& item : jsonValue.GetMap()) {
callbacks->OnMapKey(item.first);
WalkJsonTree(item.second, callbacks);
}
callbacks->OnCloseMap();
}
return;
case JSON_ARRAY:
{
callbacks->OnOpenArray();
for (const auto& item : jsonValue.GetArray()) {
WalkJsonTree(item, callbacks);
}
callbacks->OnCloseArray();
}
return;
case JSON_UNDEFINED:
ythrow yexception() << "cannot consume undefined json value";
return;
}
Y_UNREACHABLE();
}
static TNode CreateEmptyNodeByType(::NYson::EYsonType type)
{
TNode result;
switch (type) {
case ::NYson::EYsonType::ListFragment:
result = TNode::CreateList();
break;
case ::NYson::EYsonType::MapFragment:
result = TNode::CreateMap();
break;
default:
break;
}
return result;
}
static TNode NodeFromYsonStream(IInputStream* input, ::NYson::EYsonType type, bool consumeUntilEof)
{
TNode result = CreateEmptyNodeByType(type);
ui64 bufferSizeLimit = 64_KB;
if (!consumeUntilEof) {
// Other values might be in the stream, so reading one symbol at a time.
bufferSizeLimit = 1;
}
TNodeBuilder builder(&result);
::NYson::TYsonParser parser(
&builder,
input,
type,
/*enableLinePositionInfo*/ false,
bufferSizeLimit,
consumeUntilEof);
parser.Parse();
return result;
}
TNode NodeFromYsonString(const TStringBuf input, ::NYson::EYsonType type)
{
TMemoryInput stream(input);
return NodeFromYsonStream(&stream, type);
}
TString NodeToYsonString(const TNode& node, NYson::EYsonFormat format)
{
TStringStream stream;
NodeToYsonStream(node, &stream, format);
return stream.Str();
}
TString NodeToCanonicalYsonString(const TNode& node, NYson::EYsonFormat format)
{
TStringStream stream;
NodeToCanonicalYsonStream(node, &stream, format);
return stream.Str();
}
TNode NodeFromYsonStream(IInputStream* input, ::NYson::EYsonType type)
{
return NodeFromYsonStream(input, type, /*consumeUntilEof*/ true);
}
TNode NodeFromYsonStreamNonGreedy(IInputStream* input, ::NYson::EYsonType type)
{
return NodeFromYsonStream(input, type, /*consumeUntilEof*/ false);
}
void NodeToYsonStream(const TNode& node, IOutputStream* output, NYson::EYsonFormat format)
{
::NYson::TYsonWriter writer(output, format);
TNodeVisitor visitor(&writer);
visitor.Visit(node);
}
void NodeToCanonicalYsonStream(const TNode& node, IOutputStream* output, NYson::EYsonFormat format)
{
::NYson::TYsonWriter writer(output, format);
TNodeVisitor visitor(&writer, /*sortMapKeys*/ true);
visitor.Visit(node);
}
bool TryNodeFromJsonString(const TStringBuf input, TNode& dst)
{
TMemoryInput stream(input);
TNodeBuilder builder(&dst);
TYson2JsonCallbacksAdapter callbacks(&builder, /*throwException*/ false);
NJson::TJsonReaderConfig config;
config.DontValidateUtf8 = true;
NJson::ReadJson(&stream, &config, &callbacks);
return !callbacks.GetHaveErrors();
}
TNode NodeFromJsonString(const TStringBuf input)
{
TMemoryInput stream(input);
TNode result;
TNodeBuilder builder(&result);
TYson2JsonCallbacksAdapter callbacks(&builder, /*throwException*/ true);
NJson::TJsonReaderConfig config;
config.DontValidateUtf8 = true;
NJson::ReadJson(&stream, &config, &callbacks);
return result;
}
TNode NodeFromJsonStringIterative(const TStringBuf input, ui64 maxDepth)
{
TMemoryInput stream(input);
TNode result;
TNodeBuilder builder(&result);
TYson2JsonCallbacksAdapter callbacks(&builder, /*throwException*/ true, maxDepth);
NJson::TJsonReaderConfig config;
config.DontValidateUtf8 = true;
config.UseIterativeParser = true;
config.MaxDepth = maxDepth;
NJson::ReadJson(&stream, &config, &callbacks);
return result;
}
TNode NodeFromJsonValue(const NJson::TJsonValue& input)
{
TNode result;
TNodeBuilder builder(&result);
TYson2JsonCallbacksAdapter callbacks(&builder, /*throwException*/ true);
WalkJsonTree(input, &callbacks);
return result;
}
////////////////////////////////////////////////////////////////////////////////
} // namespace NYT
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