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/*
* Copyright (C) 2025 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "ExceptionOr.h"
#include "IDLTypes.h"
#include "JSValueInWrappedObject.h"
#include "ScriptWrappable.h"
#include "WebCoreOpaqueRoot.h"
#include <wtf/Deque.h>
#include <wtf/RefCountedAndCanMakeWeakPtr.h>
#include <wtf/TZoneMalloc.h>
#include <wtf/UniqueRef.h>
namespace WebCore {
class DOMPromise;
class DeferredPromise;
class ReadableStream;
class ReadableStreamReadIntoRequest;
template<typename IDLType> class DOMPromiseProxy;
class ReadableStreamBYOBReader : public ScriptWrappable, public RefCountedAndCanMakeWeakPtr<ReadableStreamBYOBReader> {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(ReadableStreamBYOBReader);
public:
static ExceptionOr<Ref<ReadableStreamBYOBReader>> create(JSDOMGlobalObject&, ReadableStream&);
~ReadableStreamBYOBReader();
struct ReadOptions {
size_t min { 1 };
};
void readForBindings(JSDOMGlobalObject&, JSC::ArrayBufferView&, ReadOptions, Ref<DeferredPromise>&&);
void releaseLock(JSDOMGlobalObject&);
DOMPromise& closedPromise();
Ref<DOMPromise> cancel(JSDOMGlobalObject&, JSC::JSValue);
Ref<ReadableStreamReadIntoRequest> takeFirstReadIntoRequest();
size_t readIntoRequestsSize() const { return m_readIntoRequests.size(); }
void addReadIntoRequest(Ref<ReadableStreamReadIntoRequest>&&);
void resolveClosedPromise();
void rejectClosedPromise(JSC::JSValue);
void errorReadIntoRequests(JSC::JSValue);
using ClosedCallback = Function<void(JSDOMGlobalObject&, JSC::JSValue)>;
void onClosedPromiseRejection(ClosedCallback&&);
void read(JSDOMGlobalObject&, JSC::ArrayBufferView&, size_t, Ref<ReadableStreamReadIntoRequest>&&);
template<typename Visitor> void visitAdditionalChildren(Visitor&);
private:
explicit ReadableStreamBYOBReader(Ref<DOMPromise>&&, Ref<DeferredPromise>&&);
ExceptionOr<void> setupBYOBReader(JSDOMGlobalObject&, ReadableStream&);
void initialize(JSDOMGlobalObject&, ReadableStream&);
void genericRelease(JSDOMGlobalObject&);
void errorReadIntoRequests(Exception&&);
Ref<DOMPromise> genericCancel(JSDOMGlobalObject&, JSC::JSValue);
Ref<DOMPromise> m_closedPromise;
Ref<DeferredPromise> m_closedDeferred;
RefPtr<ReadableStream> m_stream;
Deque<Ref<ReadableStreamReadIntoRequest>> m_readIntoRequests;
ClosedCallback m_closedCallback;
};
WebCoreOpaqueRoot root(ReadableStreamBYOBReader*);
} // namespace WebCore
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