More cleanup of DefaultApps code

chrome/browser/extensions/default_apps.h

 // 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_BROWSER_EXTENSIONS_DEFAULT_APPS_H_
 #define CHROME_BROWSER_EXTENSIONS_DEFAULT_APPS_H_
 #pragma once
 
 #include <set>
 #include <string>
 #include "chrome/common/extensions/extension.h"
 #include "base/gtest_prod_util.h"
 
 class PrefService;
 
-// Manages the installation of the set of default apps into Chrome, and the
-// promotion of those apps in the launcher.
-//
-// It implements the following rules:
-//
-// - Only install default apps once per-profile.
-// - Don't install default apps if any apps are already installed.
-// - Do not start showing the promo until all default apps have been installed.
-// - Do not show the promo if it has been hidden by the user.
-// - Do not show promo after one app has been manually installed or uninstalled.
-// - Do not show promo if the set of installed apps is different than the set of
-//   default apps.
-// - Only show promo a certain amount of times.
-//
-// The promo can also be forced on with --force-apps-promo-visible.
+// Encapsulates business logic for:
+// - Whether to install default apps on Chrome startup
+// - Whether to show the app launcher
+// - Whether to show the apps promo in the launcher
 class DefaultApps {
  public:
   // The maximum number of times to show the apps promo.
   static const int kAppsPromoCounterMax;
 
   // Register our preferences.
   static void RegisterUserPrefs(PrefService* prefs);
 
-  explicit DefaultApps(PrefService* prefs);
+  explicit DefaultApps(PrefService* prefs,
+                       const std::string& application_locale);
   ~DefaultApps();
 
-  // Gets the list of default apps that should be installed. Can return NULL if
-  // no apps need to be installed.
-  const ExtensionIdSet* GetAppsToInstall() const;
+  // Gets the set of default apps.
+  const ExtensionIdSet& default_apps() const;
 
-  // Gets the list of default apps.
-  const ExtensionIdSet* GetDefaultApps() const;
+  // Returns true if the default apps should be installed.
+  bool ShouldInstallDefaultApps(const ExtensionIdSet& installed_ids);
 
-  // Returns true if the default apps have been installed. False otherwise.
-  bool GetDefaultAppsInstalled() const;
+  // Returns true if the app launcher in the NTP should be shown.
+  bool ShouldShowAppLauncher(const ExtensionIdSet& installed_ids);
+
+  // Returns true if the apps promo should be displayed in the launcher.
+  //
+  // NOTE: If the default apps have been installed, but |installed_ids| is
+  // different than GetDefaultApps(), this will permanently expire the promo.
+  bool ShouldShowPromo(const ExtensionIdSet& installed_ids);
 
   // Should be called after each app is installed. Once installed_ids contains
   // all the default apps, GetAppsToInstall() will start returning NULL.
   void DidInstallApp(const ExtensionIdSet& installed_ids);
 
-  // Returns true if the apps promo should be displayed in the launcher.
-  //
-  // NOTE: If the default apps have been installed, but |installed_ids| is
-  // different than GetDefaultApps(), this will permanently expire the promo.
-  bool CheckShouldShowPromo(const ExtensionIdSet& installed_ids);
-
   // Should be called after each time the promo is installed.
   void DidShowPromo();
 
   // Force the promo to be hidden.
   void SetPromoHidden();
 
  private:
-  FRIEND_TEST_ALL_PREFIXES(ExtensionDefaultApps, Basics);
+  FRIEND_TEST_ALL_PREFIXES(ExtensionDefaultApps, HappyPath);
+  FRIEND_TEST_ALL_PREFIXES(ExtensionDefaultApps, UnsupportedLocale);
   FRIEND_TEST_ALL_PREFIXES(ExtensionDefaultApps, HidePromo);
   FRIEND_TEST_ALL_PREFIXES(ExtensionDefaultApps, InstallingAnAppHidesPromo);
   FRIEND_TEST_ALL_PREFIXES(ExtensionDefaultApps,
                            ManualAppInstalledWhileInstallingDefaultApps);
 
+  bool DefaultAppSupported();
+  bool DefaultAppsSupportedForLanguage();
+
+  bool NonDefaultAppIsInstalled(const ExtensionIdSet& installed_ids) const;
+
+  bool GetDefaultAppsInstalled() const;
   void SetDefaultAppsInstalled(bool val);
 
   int GetPromoCounter() const;
   void SetPromoCounter(int val);
 
   // Our permanent state is stored in this PrefService instance.
   PrefService* prefs_;
 
+  // The locale the browser is currently in.
+  std::string application_locale_;
+
   // The set of default extensions. Initialized to a static list in the
   // constructor.
   ExtensionIdSet ids_;
 
   DISALLOW_COPY_AND_ASSIGN(DefaultApps);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_DEFAULT_APPS_H_