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/* -------------------------------------------
Copyright (C) 2024-2025, Amlal El Mahrouss, all rights reserved.
------------------------------------------- */
#pragma once
// last-rev: 02/04/25
#include <CompilerKit/CompilerKit.h>
#include <NewKit/Defines.h>
#include <NewKit/Stream.h>
#include <NewKit/KString.h>
#include <NewKit/Utils.h>
#define kJSONMaxLen (8196)
#define kJSONLen (256)
#define kJSONNullArr "[]"
#define kJSONNullObj "{}"
namespace Kernel
{
/// @brief JavaScript object class
class Json final
{
public:
explicit Json()
{
auto len = kJSONMaxLen;
KString key = KString(len);
key += kJSONNullObj;
this->AsKey() = key;
this->AsValue() = key;
}
explicit Json(SizeT lhsLen, SizeT rhsLen)
: fKey(lhsLen), fValue(rhsLen)
{
}
~Json() = default;
NE_COPY_DEFAULT(Json)
Bool& IsUndefined()
{
return fUndefined;
}
private:
Bool fUndefined; // is this instance undefined?
KString fKey;
KString fValue;
public:
/// @brief returns the key of the json
/// @return the key as string view.
KString& AsKey()
{
return fKey;
}
/// @brief returns the value of the json.
/// @return the key as string view.
KString& AsValue()
{
return fValue;
}
static Json kNull;
};
/// @brief Json stream reader helper.
struct JsonStreamReader final
{
STATIC Json In(const Char* full_array)
{
auto start_val = '{';
auto end_val = '}';
Boolean probe_value = false;
if (full_array[0] != start_val)
{
if (full_array[0] != '[')
return Json::kNull;
start_val = '[';
end_val = ']';
probe_value = true;
}
SizeT len = rt_string_len(full_array);
SizeT key_len = 0;
SizeT value_len = 0;
Json type(kJSONMaxLen, kJSONMaxLen);
for (SizeT i = 1; i < len; ++i)
{
if (full_array[i] == '\r' ||
full_array[i] == '\n')
continue;
if (probe_value)
{
if (full_array[i] == end_val ||
full_array[i] == ',')
{
probe_value = false;
++value_len;
}
else
{
if (full_array[i] == '\'')
{
type.AsValue().Data()[value_len] = 0;
break;
}
type.AsValue().Data()[value_len] = full_array[i];
++value_len;
}
}
else
{
if (start_val == '[')
continue;
if (full_array[i] == ':')
{
type.AsKey().Data()[key_len] = 0;
++key_len;
++i;
while (full_array[i] == ' ' ||
full_array[i] == '\t')
++i;
probe_value = true;
}
else
{
type.AsKey().Data()[key_len] = full_array[i];
++key_len;
}
}
}
type.AsValue().Data()[value_len] = 0;
return type;
}
};
using JsonStream = Stream<JsonStreamReader, Json>;
} // namespace Kernel
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