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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_FIRST_PARTY_SETS_FIRST_PARTY_SETS_HANDLER_IMPL_H_
#define CONTENT_BROWSER_FIRST_PARTY_SETS_FIRST_PARTY_SETS_HANDLER_IMPL_H_
#include <optional>
#include "base/files/file_path.h"
#include "base/functional/callback.h"
#include "content/common/content_export.h"
#include "content/public/browser/first_party_sets_handler.h"
#include "net/first_party_sets/global_first_party_sets.h"
#include "net/first_party_sets/local_set_declaration.h"
namespace content {
// FirstPartySetsHandlerImpl is an abstract class, encapsulating the
// content-internal details of the First-Party Sets infrastructure. This class
// is abstract so that it can be mocked during testing.
class CONTENT_EXPORT FirstPartySetsHandlerImpl : public FirstPartySetsHandler {
public:
static FirstPartySetsHandlerImpl* GetInstance();
static void SetInstanceForTesting(FirstPartySetsHandlerImpl* test_instance);
// This method reads the persisted First-Party Sets from the file under
// `user_data_dir` and sets the First-Party Set that was provided via the
// flag(s).
//
// If First-Party Sets is disabled, then this method still needs to read the
// persisted sets, since we may still need to clear data from a previous
// invocation of Chromium which had First-Party Sets enabled.
//
// Only the first call has any effect.
void virtual Init(const base::FilePath& user_data_dir,
const net::LocalSetDeclaration& local_set) = 0;
// Returns the fully-parsed and validated global First-Party Sets data.
// Returns the data synchronously via an std::optional if it's already
// available, or via an asynchronously-invoked callback if the data is not
// ready yet.
//
// This function makes a clone of the underlying data.
//
// If `callback` is null, it will not be invoked, even if the First-Party Sets
// data is not ready yet.
//
// If First-Party Sets is disabled, this returns a populated optional with an
// empty GlobalFirstPartySets instance.
[[nodiscard]] virtual std::optional<net::GlobalFirstPartySets> GetSets(
base::OnceCallback<void(net::GlobalFirstPartySets)> callback) = 0;
};
} // namespace content
#endif // CONTENT_BROWSER_FIRST_PARTY_SETS_FIRST_PARTY_SETS_HANDLER_IMPL_H_
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