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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_ASH_FILE_SYSTEM_PROVIDER_REQUEST_VALUE_H_
#define CHROME_BROWSER_ASH_FILE_SYSTEM_PROVIDER_REQUEST_VALUE_H_
#include <string>
#include <variant>
#include "chrome/common/extensions/api/file_system_provider_internal.h"
namespace ash::file_system_provider {
// Holds a parsed value returned by a file system provider. Each accessor can
// return nullptr in case the requested value type is not available. It is used
// to pass values of success callbacks.
class RequestValue {
public:
// Creates an empty value. Use static methods to create a value holding a
// proper content.
RequestValue() noexcept;
RequestValue(RequestValue&& other) noexcept;
RequestValue& operator=(RequestValue&& other) noexcept;
~RequestValue() noexcept;
static RequestValue CreateForUnmountSuccess(
extensions::api::file_system_provider_internal::UnmountRequestedSuccess::
Params params);
static RequestValue CreateForGetMetadataSuccess(
extensions::api::file_system_provider_internal::
GetMetadataRequestedSuccess::Params params);
static RequestValue CreateForGetActionsSuccess(
extensions::api::file_system_provider_internal::
GetActionsRequestedSuccess::Params params);
static RequestValue CreateForReadDirectorySuccess(
extensions::api::file_system_provider_internal::
ReadDirectoryRequestedSuccess::Params params);
static RequestValue CreateForReadFileSuccess(
extensions::api::file_system_provider_internal::ReadFileRequestedSuccess::
Params params);
static RequestValue CreateForOpenFileSuccess(
extensions::api::file_system_provider_internal::OpenFileRequestedSuccess::
Params params);
static RequestValue CreateForOperationSuccess(
extensions::api::file_system_provider_internal::
OperationRequestedSuccess::Params params);
static RequestValue CreateForOperationError(
extensions::api::file_system_provider_internal::OperationRequestedError::
Params params);
static RequestValue CreateForTesting(const std::string& params);
const extensions::api::file_system_provider_internal::
UnmountRequestedSuccess::Params*
unmount_success_params() const {
return std::get_if<extensions::api::file_system_provider_internal::
UnmountRequestedSuccess::Params>(&data_);
}
const extensions::api::file_system_provider_internal::
GetMetadataRequestedSuccess::Params*
get_metadata_success_params() const {
return std::get_if<extensions::api::file_system_provider_internal::
GetMetadataRequestedSuccess::Params>(&data_);
}
const extensions::api::file_system_provider_internal::
GetActionsRequestedSuccess::Params*
get_actions_success_params() const {
return std::get_if<extensions::api::file_system_provider_internal::
GetActionsRequestedSuccess::Params>(&data_);
}
const extensions::api::file_system_provider_internal::
ReadDirectoryRequestedSuccess::Params*
read_directory_success_params() const {
return std::get_if<extensions::api::file_system_provider_internal::
ReadDirectoryRequestedSuccess::Params>(&data_);
}
const extensions::api::file_system_provider_internal::
ReadFileRequestedSuccess::Params*
read_file_success_params() const {
return std::get_if<extensions::api::file_system_provider_internal::
ReadFileRequestedSuccess::Params>(&data_);
}
const extensions::api::file_system_provider_internal::
OpenFileRequestedSuccess::Params*
open_file_success_params() const {
return std::get_if<extensions::api::file_system_provider_internal::
OpenFileRequestedSuccess::Params>(&data_);
}
const extensions::api::file_system_provider_internal::
OperationRequestedSuccess::Params*
operation_success_params() const {
return std::get_if<extensions::api::file_system_provider_internal::
OperationRequestedSuccess::Params>(&data_);
}
const extensions::api::file_system_provider_internal::
OperationRequestedError::Params*
operation_error_params() const {
return std::get_if<extensions::api::file_system_provider_internal::
OperationRequestedError::Params>(&data_);
}
const std::string* testing_params() const {
return std::get_if<std::string>(&data_);
}
bool is_valid() const {
return !std::holds_alternative<std::monostate>(data_);
}
private:
// A variant holding the possible types of data held as a value.
std::variant<std::monostate,
extensions::api::file_system_provider_internal::
UnmountRequestedSuccess::Params,
extensions::api::file_system_provider_internal::
GetMetadataRequestedSuccess::Params,
extensions::api::file_system_provider_internal::
GetActionsRequestedSuccess::Params,
extensions::api::file_system_provider_internal::
ReadDirectoryRequestedSuccess::Params,
extensions::api::file_system_provider_internal::
ReadFileRequestedSuccess::Params,
extensions::api::file_system_provider_internal::
OpenFileRequestedSuccess::Params,
extensions::api::file_system_provider_internal::
OperationRequestedSuccess::Params,
extensions::api::file_system_provider_internal::
OperationRequestedError::Params,
std::string>
data_;
};
} // namespace ash::file_system_provider
#endif // CHROME_BROWSER_ASH_FILE_SYSTEM_PROVIDER_REQUEST_VALUE_H_
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