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/*
* Copyright (c) 2022, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Runtime/Array.h>
#include <LibJS/Runtime/IteratorOperations.h>
#include <LibWeb/Bindings/HeadersIteratorPrototype.h>
#include <LibWeb/Bindings/Intrinsics.h>
#include <LibWeb/Fetch/HeadersIterator.h>
namespace Web::Bindings {
template<>
void Intrinsics::create_web_prototype_and_constructor<HeadersIteratorPrototype>(JS::Realm& realm)
{
auto prototype = heap().allocate<HeadersIteratorPrototype>(realm, realm).release_allocated_value_but_fixme_should_propagate_errors();
m_prototypes.set("HeadersIterator"sv, prototype);
}
}
namespace Web::Fetch {
WebIDL::ExceptionOr<JS::NonnullGCPtr<HeadersIterator>> HeadersIterator::create(Headers const& headers, JS::Object::PropertyKind iteration_kind)
{
return MUST_OR_THROW_OOM(headers.heap().allocate<HeadersIterator>(headers.realm(), headers, iteration_kind));
}
HeadersIterator::HeadersIterator(Headers const& headers, JS::Object::PropertyKind iteration_kind)
: PlatformObject(headers.realm())
, m_headers(headers)
, m_iteration_kind(iteration_kind)
{
}
HeadersIterator::~HeadersIterator() = default;
JS::ThrowCompletionOr<void> HeadersIterator::initialize(JS::Realm& realm)
{
MUST_OR_THROW_OOM(Base::initialize(realm));
set_prototype(&Bindings::ensure_web_prototype<Bindings::HeadersIteratorPrototype>(realm, "HeadersIterator"));
return {};
}
void HeadersIterator::visit_edges(JS::Cell::Visitor& visitor)
{
Base::visit_edges(visitor);
visitor.visit(m_headers);
}
// https://webidl.spec.whatwg.org/#es-iterable, Step 2
JS::ThrowCompletionOr<JS::Object*> HeadersIterator::next()
{
// The value pairs to iterate over are the return value of running sort and combine with this’s header list.
auto value_pairs_to_iterate_over = [&]() -> JS::ThrowCompletionOr<Vector<Fetch::Infrastructure::Header>> {
auto headers_or_error = m_headers->m_header_list->sort_and_combine();
if (headers_or_error.is_error())
return vm().throw_completion<JS::InternalError>(JS::ErrorType::NotEnoughMemoryToAllocate);
return headers_or_error.release_value();
};
auto pairs = TRY(value_pairs_to_iterate_over());
if (m_index >= pairs.size())
return create_iterator_result_object(vm(), JS::js_undefined(), true);
auto const& pair = pairs[m_index++];
StringView pair_name { pair.name };
StringView pair_value { pair.value };
switch (m_iteration_kind) {
case JS::Object::PropertyKind::Key:
return create_iterator_result_object(vm(), MUST_OR_THROW_OOM(JS::PrimitiveString::create(vm(), pair_name)), false);
case JS::Object::PropertyKind::Value:
return create_iterator_result_object(vm(), MUST_OR_THROW_OOM(JS::PrimitiveString::create(vm(), pair_value)), false);
case JS::Object::PropertyKind::KeyAndValue: {
auto array = JS::Array::create_from(realm(), { MUST_OR_THROW_OOM(JS::PrimitiveString::create(vm(), pair_name)), MUST_OR_THROW_OOM(JS::PrimitiveString::create(vm(), pair_value)) });
return create_iterator_result_object(vm(), array, false);
}
default:
VERIFY_NOT_REACHED();
}
}
}
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