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#include "json_prettifier.h"
#include <util/generic/deque.h>
#include <util/generic/algorithm.h>
#include <util/memory/pool.h>
#include <util/string/util.h>
#include <library/cpp/string_utils/relaxed_escaper/relaxed_escaper.h>
namespace NJson {
struct TRewritableOut {
IOutputStream& Slave;
char Last = 0;
bool Dirty = false;
TRewritableOut(IOutputStream& sl)
: Slave(sl)
{
}
template <typename T>
void Write(const T& t) {
Flush();
Slave << t;
}
void Hold(char c) {
if (Dirty)
Flush();
Last = c;
Dirty = true;
}
void Flush() {
if (Dirty) {
Slave << Last;
Dirty = false;
}
}
void Revert() {
Dirty = false;
}
};
struct TSpaces {
char S[256];
TSpaces() {
memset(&S, ' ', sizeof(S));
}
TStringBuf Get(ui8 sz) const {
return TStringBuf(S, sz);
}
};
bool TJsonPrettifier::MayUnquoteNew(TStringBuf s) {
static str_spn alpha("a-zA-Z_@$", true);
static str_spn alnum("a-zA-Z_@$0-9.-", true);
static TStringBuf true0("true");
static TStringBuf false0("false");
static TStringBuf null0("null");
return !!s && alpha.chars_table[(ui8)s[0]] && alnum.cbrk(s.begin() + 1, s.end()) == s.end() && !EqualToOneOf(s, null0, true0, false0);
}
// to keep arcadia tests happy
bool TJsonPrettifier::MayUnquoteOld(TStringBuf s) {
static str_spn alpha("a-zA-Z_@$", true);
static str_spn alnum("a-zA-Z_@$0-9", true);
static TStringBuf true0("true");
static TStringBuf false0("false");
static TStringBuf true1("on");
static TStringBuf false1("off");
static TStringBuf true2("da");
static TStringBuf false2("net");
static TStringBuf null0("null");
return !!s && alpha.chars_table[(ui8)s[0]] && alnum.cbrk(s.begin() + 1, s.end()) == s.end() && !EqualToOneOf(s, null0, true0, false0, true1, false1, true2, false2);
}
class TPrettifier: public TJsonCallbacks {
TRewritableOut Out;
TStringBuf Spaces;
TStringBuf Quote;
TStringBuf Unsafe;
TStringBuf Safe;
ui32 Level = 0;
ui32 MaxPaddingLevel;
bool Unquote = false;
bool Compactify = false;
bool NewUnquote = false;
public:
TPrettifier(IOutputStream& out, const TJsonPrettifier& p)
: Out(out)
, MaxPaddingLevel(p.MaxPaddingLevel)
, Unquote(p.Unquote)
, Compactify(p.Compactify)
, NewUnquote(p.NewUnquote)
{
static TSpaces spaces;
Spaces = spaces.Get(p.Padding);
if (p.SingleQuotes) {
Quote = Unsafe = "'";
Safe = "\"";
} else {
Quote = Unsafe = "\"";
Safe = "'";
}
}
void Pad(bool close = false) {
if (Compactify) {
Out.Flush();
return;
}
if (Level > MaxPaddingLevel || (Level == MaxPaddingLevel && close)) {
Out.Write(" ");
return;
}
if (Level || close) {
Out.Write(Spaces ? "\n" : " ");
}
for (ui32 i = 0; i < Level; ++i) {
Out.Write(Spaces);
}
}
void WriteSpace(char sp) {
if (Compactify) {
Out.Flush();
return;
}
Out.Write(sp);
}
void OnVal() {
if (Out.Dirty && ':' == Out.Last) {
WriteSpace(' ');
} else {
Pad();
}
}
void AfterVal() {
Out.Hold(',');
}
template <typename T>
bool WriteVal(const T& t) {
OnVal();
Out.Write(t);
AfterVal();
return true;
}
bool OnNull() override {
return WriteVal(TStringBuf("null"));
}
bool OnBoolean(bool v) override {
return WriteVal(v ? TStringBuf("true") : TStringBuf("false"));
}
bool OnInteger(long long i) override {
return WriteVal(i);
}
bool OnUInteger(unsigned long long i) override {
return WriteVal(i);
}
bool OnDouble(double d) override {
return WriteVal(d);
}
void WriteString(TStringBuf s) {
if (Unquote && (NewUnquote ? TJsonPrettifier::MayUnquoteNew(s) : TJsonPrettifier::MayUnquoteOld(s))) {
Out.Slave << s;
} else {
Out.Slave << Quote;
NEscJ::EscapeJ<false, true>(s, Out.Slave, Safe, Unsafe);
Out.Slave << Quote;
}
}
bool OnString(const TStringBuf& s) override {
OnVal();
WriteString(s);
AfterVal();
return true;
}
bool OnOpen(char c) {
OnVal();
Level++;
Out.Hold(c);
return true;
}
bool OnOpenMap() override {
return OnOpen('{');
}
bool OnOpenArray() override {
return OnOpen('[');
}
bool OnMapKey(const TStringBuf& k) override {
OnVal();
WriteString(k);
WriteSpace(' ');
Out.Hold(':');
return true;
}
bool OnClose(char c) {
if (!Level)
return false;
Level--;
if (Out.Dirty && c == Out.Last) {
WriteSpace(' ');
} else {
Out.Revert();
Pad(true);
}
return true;
}
bool OnCloseMap() override {
if (!OnClose('{'))
return false;
Out.Write("}");
AfterVal();
return true;
}
bool OnCloseArray() override {
if (!OnClose('['))
return false;
Out.Write("]");
AfterVal();
return true;
}
bool OnEnd() override {
return !Level;
}
};
bool TJsonPrettifier::Prettify(TStringBuf in, IOutputStream& out) const {
TPrettifier p(out, *this);
if (Strict) {
TMemoryInput mIn(in.data(), in.size());
return ReadJson(&mIn, &p);
} else {
return ReadJsonFast(in, &p);
}
}
TString TJsonPrettifier::Prettify(TStringBuf in) const {
TStringStream s;
if (Prettify(in, s))
return s.Str();
return TString();
}
}
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