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/*
* Copyright (c) 2022, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Runtime/AbstractOperations.h>
#include <LibJS/Runtime/Value.h>
#include <LibTextCodec/Decoder.h>
#include <LibWeb/Infra/JSON.h>
#include <LibWeb/WebIDL/ExceptionOr.h>
namespace Web::Infra {
// https://infra.spec.whatwg.org/#parse-a-json-string-to-a-javascript-value
WebIDL::ExceptionOr<JS::Value> parse_json_string_to_javascript_value(JS::VM& vm, StringView string)
{
auto& realm = *vm.current_realm();
// 1. Return ? Call(%JSON.parse%, undefined, « string »).
return TRY(JS::call(vm, realm.intrinsics().json_parse_function(), JS::js_undefined(), JS::PrimitiveString::create(vm, string)));
}
// https://infra.spec.whatwg.org/#parse-json-bytes-to-a-javascript-value
WebIDL::ExceptionOr<JS::Value> parse_json_bytes_to_javascript_value(JS::VM& vm, ReadonlyBytes bytes)
{
// 1. Let string be the result of running UTF-8 decode on bytes.
TextCodec::UTF8Decoder decoder;
auto string = decoder.to_utf8(bytes);
// 2. Return the result of parsing a JSON string to an Infra value given string.
return parse_json_string_to_javascript_value(vm, string);
}
// https://infra.spec.whatwg.org/#serialize-a-javascript-value-to-a-json-string
WebIDL::ExceptionOr<DeprecatedString> serialize_javascript_value_to_json_string(JS::VM& vm, JS::Value value)
{
auto& realm = *vm.current_realm();
// 1. Let result be ? Call(%JSON.stringify%, undefined, « value »).
auto result = TRY(JS::call(vm, realm.intrinsics().json_stringify_function(), JS::js_undefined(), value));
// 2. If result is undefined, then throw a TypeError.
if (result.is_undefined())
return WebIDL::SimpleException { WebIDL::SimpleExceptionType::TypeError, "Result of stringifying value must not be undefined"sv };
// 3. Assert: result is a string.
VERIFY(result.is_string());
// 4. Return result.
return result.as_string().deprecated_string();
}
// https://infra.spec.whatwg.org/#serialize-a-javascript-value-to-json-bytes
WebIDL::ExceptionOr<ByteBuffer> serialize_javascript_value_to_json_bytes(JS::VM& vm, JS::Value value)
{
auto& realm = *vm.current_realm();
// 1. Let string be the result of serializing a JavaScript value to a JSON string given value.
auto string = TRY(serialize_javascript_value_to_json_string(vm, value));
// 2. Return the result of running UTF-8 encode on string.
// NOTE: LibJS strings are stored as UTF-8.
return TRY_OR_RETURN_OOM(realm, ByteBuffer::copy(string.bytes()));
}
}
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