// Copyright (c) 2010 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 CHROME_INSTALLER_UTIL_PACKAGE_H_
#define CHROME_INSTALLER_UTIL_PACKAGE_H_
#pragma once

#include <vector>

#include "base/file_path.h"
#include "base/ref_counted.h"

class CommandLine;

namespace installer {

class Product;
class Version;

typedef std::vector<scoped_refptr<const Product> > Products;

// Represents a physical installation.  An instance of this class is associated
// with one or more Product instances.  Product objects can share a Package but
// not vice versa.
class Package : public base::RefCounted<Package> {
 public:
  explicit Package(const FilePath& path);

  // Returns the path of the installation folder.
  const FilePath& path() const;

  const Products& products() const;

  bool system_level() const;

  bool IsEqual(const FilePath& path) const;

  void AssociateProduct(const Product* distribution);

  // Get path to the installer under Chrome version folder
  // (for example <path>\Google\Chrome\<Version>\installer)
  FilePath GetInstallerDirectory(const Version& version) const;

  // Figure out the oldest currently installed version for this package
  // Returns NULL if none is found.  Caller is responsible for freeing
  // the returned Version object if valid.
  // The function DCHECKs if it finds that not all products in this
  // folder have the same current version.
  Version* GetCurrentVersion() const;

  // Tries to remove all previous version directories (after a new Chrome
  // update). If an instance of Chrome with older version is still running
  // on the system, its corresponding version directory will be left intact.
  // (The version directory is subject for removal again during next update.)
  //
  // latest_version: the latest version of Chrome installed.
  void RemoveOldVersionDirectories(const Version& latest_version) const;

 protected:
  FilePath path_;
  Products products_;

 private:
  friend class base::RefCounted<Package>;
  ~Package();

  DISALLOW_COPY_AND_ASSIGN(Package);
};

}  // namespace installer

#endif  // CHROME_INSTALLER_UTIL_PACKAGE_H_