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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "chrome/browser/extensions/default_apps.h"
      6 
      7 #include <set>
      8 #include <string>
      9 
     10 #include "base/command_line.h"
     11 #include "base/prefs/pref_service.h"
     12 #include "base/strings/string_util.h"
     13 #include "chrome/browser/browser_process.h"
     14 #include "chrome/browser/first_run/first_run.h"
     15 #include "chrome/browser/profiles/profile.h"
     16 #include "chrome/common/chrome_switches.h"
     17 #include "chrome/common/chrome_version_info.h"
     18 #include "chrome/common/extensions/extension_constants.h"
     19 #include "chrome/common/pref_names.h"
     20 #include "components/pref_registry/pref_registry_syncable.h"
     21 #include "extensions/common/extension.h"
     22 
     23 namespace {
     24 
     25 // Returns true if the app was a default app in Chrome 22
     26 bool IsOldDefaultApp(const std::string& extension_id) {
     27   return extension_id == extension_misc::kGmailAppId ||
     28          extension_id == extension_misc::kGoogleSearchAppId ||
     29          extension_id == extension_misc::kYoutubeAppId;
     30 }
     31 
     32 bool IsLocaleSupported() {
     33   // Don't bother installing default apps in locales where it is known that
     34   // they don't work.
     35   // TODO(rogerta): Do this check dynamically once the webstore can expose
     36   // an API. See http://crbug.com/101357
     37   const std::string& locale = g_browser_process->GetApplicationLocale();
     38   static const char* unsupported_locales[] = {"CN", "TR", "IR"};
     39   for (size_t i = 0; i < arraysize(unsupported_locales); ++i) {
     40     if (EndsWith(locale, unsupported_locales[i], false)) {
     41       return false;
     42     }
     43   }
     44   return true;
     45 }
     46 
     47 }  // namespace
     48 
     49 namespace default_apps {
     50 
     51 void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry) {
     52   registry->RegisterIntegerPref(
     53       prefs::kDefaultAppsInstallState,
     54       kUnknown,
     55       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
     56 }
     57 
     58 bool Provider::ShouldInstallInProfile() {
     59   // We decide to install or not install default apps based on the following
     60   // criteria, from highest priority to lowest priority:
     61   //
     62   // - The command line option.  Tests use this option to disable installation
     63   //   of default apps in some cases.
     64   // - If the locale is not compatible with the defaults, don't install them.
     65   // - The kDefaultApps preferences value in the profile.  This value is
     66   //   usually set in the master_preferences file.
     67   bool install_apps =
     68       profile_->GetPrefs()->GetString(prefs::kDefaultApps) == "install";
     69 
     70   InstallState state =
     71       static_cast<InstallState>(profile_->GetPrefs()->GetInteger(
     72           prefs::kDefaultAppsInstallState));
     73 
     74   is_migration_ = (state == kProvideLegacyDefaultApps);
     75 
     76   switch (state) {
     77     case kUnknown: {
     78       // Only new installations and profiles get default apps. In theory the
     79       // new profile checks should catch new installations, but that is not
     80       // always the case (http:/crbug.com/145351).
     81       chrome::VersionInfo version_info;
     82       bool is_new_profile =
     83           profile_->WasCreatedByVersionOrLater(version_info.Version().c_str());
     84       bool is_first_run = first_run::IsChromeFirstRun();
     85       if (!is_first_run && !is_new_profile)
     86         install_apps = false;
     87       break;
     88     }
     89 
     90     // The old default apps were provided as external extensions and were
     91     // installed everytime Chrome was run. Thus, changing the list of default
     92     // apps affected all users. Migrate old default apps to new mechanism where
     93     // they are installed only once as INTERNAL.
     94     // TODO(grv) : remove after Q1-2013.
     95     case kProvideLegacyDefaultApps:
     96       profile_->GetPrefs()->SetInteger(
     97           prefs::kDefaultAppsInstallState,
     98           kAlreadyInstalledDefaultApps);
     99       break;
    100 
    101     case kAlreadyInstalledDefaultApps:
    102     case kNeverInstallDefaultApps:
    103       install_apps = false;
    104       break;
    105     default:
    106       NOTREACHED();
    107   }
    108 
    109   if (install_apps && !IsLocaleSupported())
    110     install_apps = false;
    111 
    112   // Default apps are only installed on profile creation or a new chrome
    113   // download.
    114   if (state == kUnknown) {
    115     if (install_apps) {
    116       profile_->GetPrefs()->SetInteger(prefs::kDefaultAppsInstallState,
    117                                        kAlreadyInstalledDefaultApps);
    118     } else {
    119       profile_->GetPrefs()->SetInteger(prefs::kDefaultAppsInstallState,
    120                                        kNeverInstallDefaultApps);
    121     }
    122   }
    123 
    124   return install_apps;
    125 }
    126 
    127 Provider::Provider(Profile* profile,
    128                    VisitorInterface* service,
    129                    extensions::ExternalLoader* loader,
    130                    extensions::Manifest::Location crx_location,
    131                    extensions::Manifest::Location download_location,
    132                    int creation_flags)
    133     : extensions::ExternalProviderImpl(service, loader, profile, crx_location,
    134                                        download_location, creation_flags),
    135       profile_(profile),
    136       is_migration_(false) {
    137   DCHECK(profile);
    138   set_auto_acknowledge(true);
    139 }
    140 
    141 void Provider::VisitRegisteredExtension() {
    142   if (!profile_ || !ShouldInstallInProfile()) {
    143     base::DictionaryValue* prefs = new base::DictionaryValue;
    144     SetPrefs(prefs);
    145     return;
    146   }
    147 
    148   extensions::ExternalProviderImpl::VisitRegisteredExtension();
    149 }
    150 
    151 void Provider::SetPrefs(base::DictionaryValue* prefs) {
    152   if (is_migration_) {
    153     std::set<std::string> new_default_apps;
    154     for (base::DictionaryValue::Iterator i(*prefs); !i.IsAtEnd(); i.Advance()) {
    155       if (!IsOldDefaultApp(i.key()))
    156         new_default_apps.insert(i.key());
    157     }
    158     // Filter out the new default apps for migrating users.
    159     for (std::set<std::string>::iterator it = new_default_apps.begin();
    160          it != new_default_apps.end(); ++it) {
    161       prefs->Remove(*it, NULL);
    162     }
    163   }
    164 
    165   ExternalProviderImpl::SetPrefs(prefs);
    166 }
    167 
    168 }  // namespace default_apps
    169