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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef EXTENSIONS_BROWSER_UPDATER_UPDATE_INSTALL_SHIM_H_
#define EXTENSIONS_BROWSER_UPDATER_UPDATE_INSTALL_SHIM_H_
#include <string>
#include "base/callback.h"
#include "base/files/file_path.h"
#include "base/macros.h"
#include "components/update_client/update_client.h"
namespace base {
class DictionaryValue;
}
namespace extensions {
// A callback to implement the install of a new version of the extension.
// Takes ownership of the directory at |temp_dir|.
using UpdateInstallShimCallback =
base::Callback<void(const std::string& extension_id,
const base::FilePath& temp_dir)>;
// This class is used as a shim between the components::update_client and
// extensions code, to help the generic update_client code prepare and then
// install an updated version of an extension. Because the update_client code
// doesn't have the notion of extension ids, we use instances of this class to
// map an install request back to the original update check for a given
// extension.
class UpdateInstallShim : public update_client::CrxInstaller {
public:
// This method takes the id and root directory for an extension we're doing
// an update check for, as well as a callback to call if we get a new version
// of it to install.
UpdateInstallShim(std::string extension_id,
const base::FilePath& extension_root,
const UpdateInstallShimCallback& callback);
// Called when an update attempt failed.
void OnUpdateError(int error) override;
// This is called when a new version of an extension is unpacked at
// |unpack_path| and is ready for install.
bool Install(const base::DictionaryValue& manifest,
const base::FilePath& unpack_path) override;
// This is called by the generic differential update code in the
// update_client to provide the path to an existing file in the current
// version of the extension, so that it can be copied (or serve as the input
// to diff-patching) with output going to the directory with the new version
// being staged on disk for install.
bool GetInstalledFile(const std::string& file,
base::FilePath* installed_file) override;
// This method is not relevant to extension updating.
bool Uninstall() override;
private:
friend class base::RefCountedThreadSafe<UpdateInstallShim>;
~UpdateInstallShim() override;
// Takes ownership of the directory at path |temp_dir|.
void RunCallbackOnUIThread(const base::FilePath& temp_dir);
std::string extension_id_;
base::FilePath extension_root_;
UpdateInstallShimCallback callback_;
DISALLOW_COPY_AND_ASSIGN(UpdateInstallShim);
};
} // namespace extensions
#endif // EXTENSIONS_BROWSER_UPDATER_UPDATE_INSTALL_SHIM_H_
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