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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_TRUSTED_VAULT_TRUSTED_VAULT_ACCESS_TOKEN_FETCHER_H_
#define COMPONENTS_TRUSTED_VAULT_TRUSTED_VAULT_ACCESS_TOKEN_FETCHER_H_
#include <memory>
#include "base/functional/callback.h"
#include "base/types/expected.h"
struct CoreAccountId;
namespace signin {
struct AccessTokenInfo;
} // namespace signin
namespace trusted_vault {
// Allows asynchronous OAuth2 access token fetching from sequences other than
// the UI thread.
class TrustedVaultAccessTokenFetcher {
public:
enum class FetchingError {
// Used for all transient GoogleServiceAuthErrors.
kTransientAuthError,
// Used for all persistent GoogleServiceAuthError.
kPersistentAuthError,
// Used when requested account is not primary or became not primary during
// the fetching.
kNotPrimaryAccount,
};
using AccessTokenInfoOrError =
base::expected<signin::AccessTokenInfo, FetchingError>;
using TokenCallback = base::OnceCallback<void(AccessTokenInfoOrError)>;
TrustedVaultAccessTokenFetcher() = default;
TrustedVaultAccessTokenFetcher(const TrustedVaultAccessTokenFetcher& other) =
delete;
TrustedVaultAccessTokenFetcher& operator=(
const TrustedVaultAccessTokenFetcher& other) = delete;
virtual ~TrustedVaultAccessTokenFetcher() = default;
// Asynchronously fetches vault service access token for |account_id|. May be
// called from arbitrary sequence that owns |this|. |callback| will be called
// on the caller sequence.
virtual void FetchAccessToken(const CoreAccountId& account_id,
TokenCallback callback) = 0;
// May be called on any sequence.
virtual std::unique_ptr<TrustedVaultAccessTokenFetcher> Clone() = 0;
};
} // namespace trusted_vault
#endif // COMPONENTS_TRUSTED_VAULT_TRUSTED_VAULT_ACCESS_TOKEN_FETCHER_H_
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