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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 CHROME_BROWSER_ASH_CROSTINI_TERMINA_INSTALLER_H_
#define CHROME_BROWSER_ASH_CROSTINI_TERMINA_INSTALLER_H_
#include <optional>
#include <vector>
#include "base/files/file_path.h"
#include "base/functional/callback_forward.h"
#include "base/memory/weak_ptr.h"
#include "base/types/expected.h"
#include "chrome/browser/ash/guest_os/guest_os_dlc_helper.h"
namespace crostini {
// This class is responsible managing (un)installation of the Termina VM.
// From M105, we require using DLC and will forcibly remove the component even
// if loading DLC fails.
class TerminaInstaller {
public:
TerminaInstaller();
~TerminaInstaller();
TerminaInstaller(const TerminaInstaller&) = delete;
TerminaInstaller& operator=(const TerminaInstaller&) = delete;
enum class InstallResult {
// The install succeeded.
Success,
// The install failed for an unspecified reason.
Failure,
// The install failed because it needed to download an image and the device
// is offline.
Offline,
// The device must be updated before termina can be installed.
NeedUpdate,
// The install request was cancelled.
Cancelled,
};
// This is really a bool, but std::vector<bool> has weird properties that stop
// us from using bool here.
using UninstallResult = int;
// Ensure that termina is installed. This will also attempt to remove any
// other instances of termina that may be installed, but will not block on or
// check the result of this.
void Install(base::OnceCallback<void(InstallResult)> callback);
// Remove termina entirely. This will also attempt to remove any
// other instances of termina that may be installed.
void Uninstall(base::OnceCallback<void(bool)> callback);
// Get a path to the install location of termina. You must call Install and
// get a Success response back before calling this method.
base::FilePath GetInstallLocation();
// Get the id of the installed DLC, or nullopt if DLC is not being used.
std::optional<std::string> GetDlcId();
// Attempt to cancel a pending install. The DLC service does not support
// this, but we have some retry logic that can be aborted. The result
// callback is run on completion with a result of Cancelled.
// If there are multiple concurrent install requests, the wrong request may
// end up cancelled.
void CancelInstall();
private:
void OnInstallDlc(base::OnceCallback<void(InstallResult)> callback,
guest_os::GuestOsDlcInstallation::Result result);
void RemoveComponentIfPresent(base::OnceCallback<void()> callback,
UninstallResult* result);
void RemoveDlcIfPresent(base::OnceCallback<void()> callback,
UninstallResult* result);
void RemoveDlc(base::OnceCallback<void()> callback, UninstallResult* result);
void OnUninstallFinished(base::OnceCallback<void(bool)> callback,
std::vector<UninstallResult> partial_results);
std::optional<base::FilePath> termina_location_{std::nullopt};
std::optional<std::string> dlc_id_{};
// Crostini will potentially enqueue multiple installations.
//
// TODO(b/277835995): This is probably not intended, this allows you to cancel
// a concurrent installation. Consider changing to enforce
// single installations.
std::vector<std::unique_ptr<guest_os::GuestOsDlcInstallation>> installations_;
base::WeakPtrFactory<TerminaInstaller> weak_ptr_factory_{this};
};
} // namespace crostini
#endif // CHROME_BROWSER_ASH_CROSTINI_TERMINA_INSTALLER_H_
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