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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef STORAGE_BROWSER_BLOB_BLOB_TRANSPORT_STRATEGY_H_
#define STORAGE_BROWSER_BLOB_BLOB_TRANSPORT_STRATEGY_H_
#include "base/component_export.h"
#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "storage/browser/blob/blob_memory_controller.h"
#include "third_party/blink/public/mojom/blob/blob_registry.mojom.h"
namespace storage {
class BlobDataBuilder;
// This class is responsible for transporting bytes for an under-construction
// blob, using a specified transport strategy. This is used by BlobRegistryImpl
// for the actual transportation of bytes.
class COMPONENT_EXPORT(STORAGE_BROWSER) BlobTransportStrategy {
public:
using ResultCallback = base::OnceCallback<void(BlobStatus)>;
// Creates a BlobTransportStrategy instance for the specified memory strategy.
// The BlobDataBuilder and BlobStorageLimits must outlive the returned
// BlobTransportStrategy.
static std::unique_ptr<BlobTransportStrategy> Create(
BlobMemoryController::Strategy strategy,
BlobDataBuilder* builder,
ResultCallback result_callback,
const BlobStorageLimits& limits);
virtual ~BlobTransportStrategy();
// Called once for each DataElementBytes in a blob. The |bytes| passed in must
// outlive the BlobTransportStrategy instance. If |data| is bound, this call
// may use it to acquire the bytes asynchronously rather than reading from
// |bytes|.
virtual void AddBytesElement(
blink::mojom::DataElementBytes* bytes,
const mojo::Remote<blink::mojom::BytesProvider>& data) = 0;
// Called when quota has been allocated and transportation should begin.
// Implementations will call the |result_callback_| when transportation has
// completed, or failed.
virtual void BeginTransport(
std::vector<BlobMemoryController::FileCreationInfo> file_infos) = 0;
protected:
BlobTransportStrategy(BlobDataBuilder* builder,
ResultCallback result_callback);
raw_ptr<BlobDataBuilder, AcrossTasksDanglingUntriaged> builder_;
ResultCallback result_callback_;
};
} // namespace storage
#endif // STORAGE_BROWSER_BLOB_BLOB_TRANSPORT_STRATEGY_H_
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