chrome/browser/extensions/api/webstore_private/webstore_private_api.cc

// Copyright (c) 2012 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.

#include "chrome/browser/extensions/api/webstore_private/webstore_private_api.h"

#include <stddef.h>
#include <utility>
#include <vector>

#include "base/base64.h"
#include "base/bind.h"
#include "base/lazy_instance.h"
#include "base/macros.h"
#include "base/metrics/histogram_macros.h"
#include "base/strings/utf_string_conversions.h"
#include "base/threading/thread_task_runner_handle.h"
#include "base/values.h"
#include "base/version.h"
#include "chrome/browser/bitmap_fetcher/bitmap_fetcher.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/extensions/crx_installer.h"
#include "chrome/browser/extensions/extension_service.h"
#include "chrome/browser/extensions/extension_util.h"
#include "chrome/browser/extensions/install_tracker.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/safe_browsing/safe_browsing_navigation_observer_manager.h"
#include "chrome/browser/safe_browsing/safe_browsing_service.h"
#include "chrome/browser/signin/identity_manager_factory.h"
#include "chrome/browser/ui/app_list/app_list_util.h"
#include "chrome/common/extensions/extension_constants.h"
#include "chrome/common/pref_names.h"
#include "components/crx_file/id_util.h"
#include "components/prefs/pref_service.h"
#include "content/public/browser/gpu_feature_checker.h"
#include "content/public/browser/storage_partition.h"
#include "content/public/browser/web_contents.h"
#include "extensions/browser/extension_function_constants.h"
#include "extensions/browser/extension_registry.h"
#include "extensions/browser/extension_system.h"
#include "extensions/common/extension.h"
#include "net/base/load_flags.h"
#include "net/url_request/url_request.h"
#include "services/identity/public/cpp/identity_manager.h"
#include "url/gurl.h"

#if BUILDFLAG(ENABLE_SUPERVISED_USERS)
#include "chrome/browser/supervised_user/supervised_user_service.h"
#include "chrome/browser/supervised_user/supervised_user_service_factory.h"
#endif

using safe_browsing::SafeBrowsingNavigationObserverManager;

namespace extensions {

namespace BeginInstallWithManifest3 =
    api::webstore_private::BeginInstallWithManifest3;
namespace CompleteInstall = api::webstore_private::CompleteInstall;
namespace GetBrowserLogin = api::webstore_private::GetBrowserLogin;
namespace GetEphemeralAppsEnabled =
    api::webstore_private::GetEphemeralAppsEnabled;
namespace GetIsLauncherEnabled = api::webstore_private::GetIsLauncherEnabled;
namespace GetStoreLogin = api::webstore_private::GetStoreLogin;
namespace GetWebGLStatus = api::webstore_private::GetWebGLStatus;
namespace IsPendingCustodianApproval =
    api::webstore_private::IsPendingCustodianApproval;
namespace IsInIncognitoMode = api::webstore_private::IsInIncognitoMode;
namespace LaunchEphemeralApp = api::webstore_private::LaunchEphemeralApp;
namespace SetStoreLogin = api::webstore_private::SetStoreLogin;

namespace {

// Holds the Approvals between the time we prompt and start the installs.
class PendingApprovals {
 public:
  PendingApprovals();
  ~PendingApprovals();

  void PushApproval(std::unique_ptr<WebstoreInstaller::Approval> approval);
  std::unique_ptr<WebstoreInstaller::Approval> PopApproval(
      Profile* profile,
      const std::string& id);

 private:
  using ApprovalList =
      std::vector<std::unique_ptr<WebstoreInstaller::Approval>>;

  ApprovalList approvals_;

  DISALLOW_COPY_AND_ASSIGN(PendingApprovals);
};

PendingApprovals::PendingApprovals() {}
PendingApprovals::~PendingApprovals() {}

void PendingApprovals::PushApproval(
    std::unique_ptr<WebstoreInstaller::Approval> approval) {
  approvals_.push_back(std::move(approval));
}

std::unique_ptr<WebstoreInstaller::Approval> PendingApprovals::PopApproval(
    Profile* profile,
    const std::string& id) {
  for (auto iter = approvals_.begin(); iter != approvals_.end(); ++iter) {
    if (iter->get()->extension_id == id &&
        profile->IsSameProfile(iter->get()->profile)) {
      std::unique_ptr<WebstoreInstaller::Approval> approval = std::move(*iter);
      approvals_.erase(iter);
      return approval;
    }
  }
  return std::unique_ptr<WebstoreInstaller::Approval>();
}

api::webstore_private::Result WebstoreInstallHelperResultToApiResult(
    WebstoreInstallHelper::Delegate::InstallHelperResultCode result) {
  switch (result) {
    case WebstoreInstallHelper::Delegate::UNKNOWN_ERROR:
      return api::webstore_private::RESULT_UNKNOWN_ERROR;
    case WebstoreInstallHelper::Delegate::ICON_ERROR:
      return api::webstore_private::RESULT_ICON_ERROR;
    case WebstoreInstallHelper::Delegate::MANIFEST_ERROR:
      return api::webstore_private::RESULT_MANIFEST_ERROR;
  }
  NOTREACHED();
  return api::webstore_private::RESULT_NONE;
}

static base::LazyInstance<PendingApprovals>::DestructorAtExit
    g_pending_approvals = LAZY_INSTANCE_INITIALIZER;

// A preference set by the web store to indicate login information for
// purchased apps.
const char kWebstoreLogin[] = "extensions.webstore_login";

// Error messages that can be returned by the API.
const char kAlreadyInstalledError[] = "This item is already installed";
const char kWebstoreInvalidIconUrlError[] = "Invalid icon url";
const char kWebstoreInvalidIdError[] = "Invalid id";
const char kWebstoreInvalidManifestError[] = "Invalid manifest";
const char kNoPreviousBeginInstallWithManifestError[] =
    "* does not match a previous call to beginInstallWithManifest3";
const char kWebstoreUserCancelledError[] = "User cancelled install";
const char kIncognitoError[] =
    "Apps cannot be installed in guest/incognito mode";
const char kEphemeralAppLaunchingNotSupported[] =
    "Ephemeral launching of apps is no longer supported.";

// The number of user gestures to trace back for the referrer chain.
const int kExtensionReferrerUserGestureLimit = 2;

WebstoreInstaller::Delegate* test_webstore_installer_delegate = nullptr;

// We allow the web store to set a string containing login information when a
// purchase is made, so that when a user logs into sync with a different
// account we can recognize the situation. The Get function returns the login if
// there was previously stored data, or an empty string otherwise. The Set will
// overwrite any previous login.
std::string GetWebstoreLogin(Profile* profile) {
  if (profile->GetPrefs()->HasPrefPath(kWebstoreLogin))
    return profile->GetPrefs()->GetString(kWebstoreLogin);
  return std::string();
}

void SetWebstoreLogin(Profile* profile, const std::string& login) {
  profile->GetPrefs()->SetString(kWebstoreLogin, login);
}

void RecordWebstoreExtensionInstallResult(bool success) {
  UMA_HISTOGRAM_BOOLEAN("Webstore.ExtensionInstallResult", success);
}

}  // namespace

// static
void WebstorePrivateApi::SetWebstoreInstallerDelegateForTesting(
    WebstoreInstaller::Delegate* delegate) {
  test_webstore_installer_delegate = delegate;
}

// static
std::unique_ptr<WebstoreInstaller::Approval>
WebstorePrivateApi::PopApprovalForTesting(Profile* profile,
                                          const std::string& extension_id) {
  return g_pending_approvals.Get().PopApproval(profile, extension_id);
}

WebstorePrivateBeginInstallWithManifest3Function::
    WebstorePrivateBeginInstallWithManifest3Function() : chrome_details_(this) {
}

WebstorePrivateBeginInstallWithManifest3Function::
    ~WebstorePrivateBeginInstallWithManifest3Function() {
}

ExtensionFunction::ResponseAction
WebstorePrivateBeginInstallWithManifest3Function::Run() {
  params_ = Params::Create(*args_);
  EXTENSION_FUNCTION_VALIDATE(params_);

  if (!crx_file::id_util::IdIsValid(details().id)) {
    return RespondNow(BuildResponse(api::webstore_private::RESULT_INVALID_ID,
                                    kWebstoreInvalidIdError));
  }

  GURL icon_url;
  if (details().icon_url) {
    icon_url = source_url().Resolve(*details().icon_url);
    if (!icon_url.is_valid()) {
      return RespondNow(
          BuildResponse(api::webstore_private::RESULT_INVALID_ICON_URL,
                        kWebstoreInvalidIconUrlError));
    }
  }

  InstallTracker* tracker = InstallTracker::Get(browser_context());
  DCHECK(tracker);
  bool is_installed =
      extensions::ExtensionRegistry::Get(browser_context())->GetExtensionById(
          details().id, extensions::ExtensionRegistry::EVERYTHING) != nullptr;
  if (is_installed || tracker->GetActiveInstall(details().id)) {
    return RespondNow(BuildResponse(
        api::webstore_private::RESULT_ALREADY_INSTALLED,
        kAlreadyInstalledError));
  }
  ActiveInstallData install_data(details().id);
  scoped_active_install_.reset(new ScopedActiveInstall(tracker, install_data));

  network::mojom::URLLoaderFactory* loader_factory = nullptr;
  if (!icon_url.is_empty()) {
    loader_factory =
        content::BrowserContext::GetDefaultStoragePartition(browser_context())
            ->GetURLLoaderFactoryForBrowserProcess()
            .get();
  }

  scoped_refptr<WebstoreInstallHelper> helper = new WebstoreInstallHelper(
      this, details().id, details().manifest, icon_url);

  // The helper will call us back via OnWebstoreParseSuccess or
  // OnWebstoreParseFailure.
  helper->Start(loader_factory);

  // Matched with a Release in OnWebstoreParseSuccess/OnWebstoreParseFailure.
  AddRef();

  // The response is sent asynchronously in OnWebstoreParseSuccess/
  // OnWebstoreParseFailure.
  return RespondLater();
}

void WebstorePrivateBeginInstallWithManifest3Function::OnWebstoreParseSuccess(
    const std::string& id,
    const SkBitmap& icon,
    std::unique_ptr<base::DictionaryValue> parsed_manifest) {
  CHECK_EQ(details().id, id);
  CHECK(parsed_manifest);
  parsed_manifest_ = std::move(parsed_manifest);
  icon_ = icon;

  std::string localized_name =
      details().localized_name ? *details().localized_name : std::string();

  std::string error;
  dummy_extension_ = ExtensionInstallPrompt::GetLocalizedExtensionForDisplay(
      parsed_manifest_.get(),
      Extension::FROM_WEBSTORE,
      id,
      localized_name,
      std::string(),
      &error);

  if (!dummy_extension_.get()) {
    OnWebstoreParseFailure(details().id,
                           WebstoreInstallHelper::Delegate::MANIFEST_ERROR,
                           kWebstoreInvalidManifestError);
    return;
  }

  // Check the management policy before the installation process begins.
  Profile* profile = chrome_details_.GetProfile();
  base::string16 policy_error;
  bool allow =
      ExtensionSystem::Get(profile)->management_policy()->UserMayInstall(
          dummy_extension_.get(), &policy_error);
  if (!allow) {
    bool blocked_for_child = false;
#if BUILDFLAG(ENABLE_SUPERVISED_USERS)
    // If the installation was blocked because the user is a child, we send a
    // different error code so that the Web Store can adjust the UI accordingly.
    // In that case, the CWS will not show the |policy_error|.
    if (profile->IsChild()) {
      SupervisedUserService* service =
          SupervisedUserServiceFactory::GetForProfile(profile);
      // Hack: Check that the message matches to make sure installation was
      // actually blocked due to the user being a child, as opposed to, say,
      // device policy.
      if (policy_error == service->GetExtensionsLockedMessage())
        blocked_for_child = true;
    }
#endif  // BUILDFLAG(ENABLE_SUPERVISED_USERS)
    api::webstore_private::Result code =
        blocked_for_child
            ? api::webstore_private::RESULT_BLOCKED_FOR_CHILD_ACCOUNT
            : api::webstore_private::RESULT_BLOCKED_BY_POLICY;
    Respond(BuildResponse(code, base::UTF16ToUTF8(policy_error)));
    // Matches the AddRef in Run().
    Release();
    return;
  }

  content::WebContents* web_contents = GetSenderWebContents();
  if (!web_contents) {
    // The browser window has gone away.
    Respond(BuildResponse(api::webstore_private::RESULT_USER_CANCELLED,
                          kWebstoreUserCancelledError));
    // Matches the AddRef in Run().
    Release();
    return;
  }
  install_prompt_.reset(new ExtensionInstallPrompt(web_contents));
  install_prompt_->ShowDialog(
      base::Bind(&WebstorePrivateBeginInstallWithManifest3Function::
                     OnInstallPromptDone,
                 this),
      dummy_extension_.get(), &icon_,
      ExtensionInstallPrompt::GetDefaultShowDialogCallback());
  // Control flow finishes up in OnInstallPromptDone.
}

void WebstorePrivateBeginInstallWithManifest3Function::OnWebstoreParseFailure(
    const std::string& id,
    WebstoreInstallHelper::Delegate::InstallHelperResultCode result,
    const std::string& error_message) {
  CHECK_EQ(details().id, id);

  Respond(BuildResponse(WebstoreInstallHelperResultToApiResult(result),
                        error_message));

  // Matches the AddRef in Run().
  Release();
}

void WebstorePrivateBeginInstallWithManifest3Function::OnInstallPromptDone(
    ExtensionInstallPrompt::Result result) {
  if (result == ExtensionInstallPrompt::Result::ACCEPTED) {
    HandleInstallProceed();
  } else {
    HandleInstallAbort(result == ExtensionInstallPrompt::Result::USER_CANCELED);
  }

  // Matches the AddRef in Run().
  Release();
}

void WebstorePrivateBeginInstallWithManifest3Function::HandleInstallProceed() {
  // This gets cleared in CrxInstaller::ConfirmInstall(). TODO(asargent) - in
  // the future we may also want to add time-based expiration, where a whitelist
  // entry is only valid for some number of minutes.
  std::unique_ptr<WebstoreInstaller::Approval> approval(
      WebstoreInstaller::Approval::CreateWithNoInstallPrompt(
          chrome_details_.GetProfile(), details().id,
          std::move(parsed_manifest_), false));
  approval->use_app_installed_bubble = !!details().app_install_bubble;
  // If we are enabling the launcher, we should not show the app list in order
  // to train the user to open it themselves at least once.
  approval->skip_post_install_ui = !!details().enable_launcher;
  approval->dummy_extension = dummy_extension_.get();
  approval->installing_icon = gfx::ImageSkia::CreateFrom1xBitmap(icon_);
  if (details().authuser)
    approval->authuser = *details().authuser;
  g_pending_approvals.Get().PushApproval(std::move(approval));

  DCHECK(scoped_active_install_.get());
  scoped_active_install_->CancelDeregister();

  // The Permissions_Install histogram is recorded from the ExtensionService
  // for all extension installs, so we only need to record the web store
  // specific histogram here.
  ExtensionService::RecordPermissionMessagesHistogram(
      dummy_extension_.get(), "WebStoreInstall");

  Respond(BuildResponse(api::webstore_private::RESULT_SUCCESS, std::string()));
}

void WebstorePrivateBeginInstallWithManifest3Function::HandleInstallAbort(
    bool user_initiated) {
  // The web store install histograms are a subset of the install histograms.
  // We need to record both histograms here since CrxInstaller::InstallUIAbort
  // is never called for web store install cancellations.
  std::string histogram_name = user_initiated ? "WebStoreInstallCancel"
                                              : "WebStoreInstallAbort";
  ExtensionService::RecordPermissionMessagesHistogram(dummy_extension_.get(),
                                                      histogram_name.c_str());

  histogram_name = user_initiated ? "InstallCancel" : "InstallAbort";
  ExtensionService::RecordPermissionMessagesHistogram(dummy_extension_.get(),
                                                      histogram_name.c_str());

  Respond(BuildResponse(api::webstore_private::RESULT_USER_CANCELLED,
                        kWebstoreUserCancelledError));
}

ExtensionFunction::ResponseValue
WebstorePrivateBeginInstallWithManifest3Function::BuildResponse(
    api::webstore_private::Result result, const std::string& error) {
  if (result != api::webstore_private::RESULT_SUCCESS)
    return ErrorWithArguments(CreateResults(result), error);

  // The web store expects an empty string on success, so don't use
  // RESULT_SUCCESS here.
  return ArgumentList(
      CreateResults(api::webstore_private::RESULT_EMPTY_STRING));
}

std::unique_ptr<base::ListValue>
WebstorePrivateBeginInstallWithManifest3Function::CreateResults(
    api::webstore_private::Result result) const {
  return BeginInstallWithManifest3::Results::Create(result);
}

WebstorePrivateCompleteInstallFunction::
    WebstorePrivateCompleteInstallFunction() : chrome_details_(this) {}

WebstorePrivateCompleteInstallFunction::
    ~WebstorePrivateCompleteInstallFunction() {}

ExtensionFunction::ResponseAction
WebstorePrivateCompleteInstallFunction::Run() {
  std::unique_ptr<CompleteInstall::Params> params(
      CompleteInstall::Params::Create(*args_));
  EXTENSION_FUNCTION_VALIDATE(params);
  if (chrome_details_.GetProfile()->IsGuestSession() ||
      chrome_details_.GetProfile()->IsOffTheRecord()) {
    return RespondNow(Error(kIncognitoError));
  }

  if (!crx_file::id_util::IdIsValid(params->expected_id))
    return RespondNow(Error(kWebstoreInvalidIdError));

  approval_ = g_pending_approvals.Get().PopApproval(
      chrome_details_.GetProfile(), params->expected_id);
  if (!approval_) {
    return RespondNow(Error(kNoPreviousBeginInstallWithManifestError,
                            params->expected_id));
  }

  content::WebContents* web_contents = GetSenderWebContents();
  if (!web_contents) {
    return RespondNow(
        Error(function_constants::kCouldNotFindSenderWebContents));
  }

  scoped_active_install_.reset(new ScopedActiveInstall(
      InstallTracker::Get(browser_context()), params->expected_id));

  // Balanced in OnExtensionInstallSuccess() or OnExtensionInstallFailure().
  AddRef();

  // The extension will install through the normal extension install flow, but
  // the whitelist entry will bypass the normal permissions install dialog.
  scoped_refptr<WebstoreInstaller> installer = new WebstoreInstaller(
      chrome_details_.GetProfile(), this, web_contents, params->expected_id,
      std::move(approval_), WebstoreInstaller::INSTALL_SOURCE_OTHER);
  installer->Start();

  return RespondLater();
}

void WebstorePrivateCompleteInstallFunction::OnExtensionInstallSuccess(
    const std::string& id) {
  OnInstallSuccess(id);
  VLOG(1) << "Install success, sending response";
  Respond(NoArguments());

  RecordWebstoreExtensionInstallResult(true);

  // Matches the AddRef in Run().
  Release();
}

void WebstorePrivateCompleteInstallFunction::OnExtensionInstallFailure(
    const std::string& id,
    const std::string& error,
    WebstoreInstaller::FailureReason reason) {
  if (test_webstore_installer_delegate) {
    test_webstore_installer_delegate->OnExtensionInstallFailure(
        id, error, reason);
  }

  VLOG(1) << "Install failed, sending response";
  Respond(Error(error));

  RecordWebstoreExtensionInstallResult(false);

  // Matches the AddRef in Run().
  Release();
}

void WebstorePrivateCompleteInstallFunction::OnInstallSuccess(
    const std::string& id) {
  if (test_webstore_installer_delegate)
    test_webstore_installer_delegate->OnExtensionInstallSuccess(id);
}

WebstorePrivateEnableAppLauncherFunction::
    WebstorePrivateEnableAppLauncherFunction() : chrome_details_(this) {}

WebstorePrivateEnableAppLauncherFunction::
    ~WebstorePrivateEnableAppLauncherFunction() {}

ExtensionFunction::ResponseAction
WebstorePrivateEnableAppLauncherFunction::Run() {
  // TODO(crbug.com/822900): Check if this API is still in use and whether we
  // can remove it.
  return RespondNow(NoArguments());
}

WebstorePrivateGetBrowserLoginFunction::
    WebstorePrivateGetBrowserLoginFunction() : chrome_details_(this) {}

WebstorePrivateGetBrowserLoginFunction::
    ~WebstorePrivateGetBrowserLoginFunction() {}

ExtensionFunction::ResponseAction
WebstorePrivateGetBrowserLoginFunction::Run() {
  GetBrowserLogin::Results::Info info;
  info.login = IdentityManagerFactory::GetForProfile(
                   chrome_details_.GetProfile()->GetOriginalProfile())
                   ->GetPrimaryAccountInfo()
                   .email;
  return RespondNow(ArgumentList(GetBrowserLogin::Results::Create(info)));
}

WebstorePrivateGetStoreLoginFunction::
    WebstorePrivateGetStoreLoginFunction() : chrome_details_(this) {}

WebstorePrivateGetStoreLoginFunction::
    ~WebstorePrivateGetStoreLoginFunction() {}

ExtensionFunction::ResponseAction WebstorePrivateGetStoreLoginFunction::Run() {
  return RespondNow(ArgumentList(GetStoreLogin::Results::Create(
      GetWebstoreLogin(chrome_details_.GetProfile()))));
}

WebstorePrivateSetStoreLoginFunction::
    WebstorePrivateSetStoreLoginFunction() : chrome_details_(this) {}

WebstorePrivateSetStoreLoginFunction::
    ~WebstorePrivateSetStoreLoginFunction() {}

ExtensionFunction::ResponseAction WebstorePrivateSetStoreLoginFunction::Run() {
  std::unique_ptr<SetStoreLogin::Params> params(
      SetStoreLogin::Params::Create(*args_));
  EXTENSION_FUNCTION_VALIDATE(params);
  SetWebstoreLogin(chrome_details_.GetProfile(), params->login);
  return RespondNow(NoArguments());
}

WebstorePrivateGetWebGLStatusFunction::WebstorePrivateGetWebGLStatusFunction()
    : feature_checker_(content::GpuFeatureChecker::Create(
          gpu::GPU_FEATURE_TYPE_ACCELERATED_WEBGL,
          base::Bind(&WebstorePrivateGetWebGLStatusFunction::OnFeatureCheck,
                     base::Unretained(this)))) {}

WebstorePrivateGetWebGLStatusFunction::
    ~WebstorePrivateGetWebGLStatusFunction() {}

ExtensionFunction::ResponseAction WebstorePrivateGetWebGLStatusFunction::Run() {
  feature_checker_->CheckGpuFeatureAvailability();
  return RespondLater();
}

void WebstorePrivateGetWebGLStatusFunction::OnFeatureCheck(
    bool feature_allowed) {
  Respond(ArgumentList(
      GetWebGLStatus::Results::Create(api::webstore_private::ParseWebGlStatus(
          feature_allowed ? "webgl_allowed" : "webgl_blocked"))));
}

WebstorePrivateGetIsLauncherEnabledFunction::
    WebstorePrivateGetIsLauncherEnabledFunction() {}

WebstorePrivateGetIsLauncherEnabledFunction::
    ~WebstorePrivateGetIsLauncherEnabledFunction() {}

ExtensionFunction::ResponseAction
WebstorePrivateGetIsLauncherEnabledFunction::Run() {
  return RespondNow(ArgumentList(
      GetIsLauncherEnabled::Results::Create(IsAppLauncherEnabled())));
}

WebstorePrivateIsInIncognitoModeFunction::
    WebstorePrivateIsInIncognitoModeFunction() : chrome_details_(this) {}

WebstorePrivateIsInIncognitoModeFunction::
    ~WebstorePrivateIsInIncognitoModeFunction() {}

ExtensionFunction::ResponseAction
WebstorePrivateIsInIncognitoModeFunction::Run() {
  Profile* profile = chrome_details_.GetProfile();
  return RespondNow(ArgumentList(IsInIncognitoMode::Results::Create(
      profile != profile->GetOriginalProfile())));
}

WebstorePrivateLaunchEphemeralAppFunction::
    WebstorePrivateLaunchEphemeralAppFunction() : chrome_details_(this) {}

WebstorePrivateLaunchEphemeralAppFunction::
    ~WebstorePrivateLaunchEphemeralAppFunction() {}

ExtensionFunction::ResponseAction
WebstorePrivateLaunchEphemeralAppFunction::Run() {
  // Just fail as this is no longer supported.
  return RespondNow(Error(kEphemeralAppLaunchingNotSupported));
}

WebstorePrivateGetEphemeralAppsEnabledFunction::
    WebstorePrivateGetEphemeralAppsEnabledFunction() {}

WebstorePrivateGetEphemeralAppsEnabledFunction::
    ~WebstorePrivateGetEphemeralAppsEnabledFunction() {}

ExtensionFunction::ResponseAction
WebstorePrivateGetEphemeralAppsEnabledFunction::Run() {
  return RespondNow(ArgumentList(GetEphemeralAppsEnabled::Results::Create(
      false)));
}

WebstorePrivateIsPendingCustodianApprovalFunction::
    WebstorePrivateIsPendingCustodianApprovalFunction()
    : chrome_details_(this) {}

WebstorePrivateIsPendingCustodianApprovalFunction::
    ~WebstorePrivateIsPendingCustodianApprovalFunction() {}

ExtensionFunction::ResponseAction
WebstorePrivateIsPendingCustodianApprovalFunction::Run() {
  std::unique_ptr<IsPendingCustodianApproval::Params> params(
      IsPendingCustodianApproval::Params::Create(*args_));
  EXTENSION_FUNCTION_VALIDATE(params);

  Profile* profile = chrome_details_.GetProfile();

  if (!profile->IsSupervised()) {
    return RespondNow(BuildResponse(false));
  }

  ExtensionRegistry* registry = ExtensionRegistry::Get(browser_context());

  const Extension* extension =
      registry->GetExtensionById(params->id, ExtensionRegistry::EVERYTHING);
  if (!extension) {
    return RespondNow(BuildResponse(false));
  }

  ExtensionPrefs* extensions_prefs = ExtensionPrefs::Get(browser_context());

  if (extensions_prefs->HasDisableReason(
          params->id, disable_reason::DISABLE_PERMISSIONS_INCREASE)) {
    return RespondNow(BuildResponse(true));
  }

  bool is_pending_approval = extensions_prefs->HasDisableReason(
      params->id, disable_reason::DISABLE_CUSTODIAN_APPROVAL_REQUIRED);

  return RespondNow(BuildResponse(is_pending_approval));
}

ExtensionFunction::ResponseValue
WebstorePrivateIsPendingCustodianApprovalFunction::BuildResponse(bool result) {
  return OneArgument(std::make_unique<base::Value>(result));
}

WebstorePrivateGetReferrerChainFunction::
    WebstorePrivateGetReferrerChainFunction()
    : chrome_details_(this) {}

WebstorePrivateGetReferrerChainFunction::
    ~WebstorePrivateGetReferrerChainFunction() {}

ExtensionFunction::ResponseAction
WebstorePrivateGetReferrerChainFunction::Run() {
  Profile* profile = chrome_details_.GetProfile();
  if (!SafeBrowsingNavigationObserverManager::IsEnabledAndReady(profile))
    return RespondNow(ArgumentList(
        api::webstore_private::GetReferrerChain::Results::Create("")));

  content::WebContents* web_contents = GetSenderWebContents();
  if (!web_contents) {
    return RespondNow(ErrorWithArguments(
        api::webstore_private::GetReferrerChain::Results::Create(""),
        kWebstoreUserCancelledError));
  }

  scoped_refptr<SafeBrowsingNavigationObserverManager>
      navigation_observer_manager = g_browser_process->safe_browsing_service()
                                        ->navigation_observer_manager();

  safe_browsing::ReferrerChain referrer_chain;
  SafeBrowsingNavigationObserverManager::AttributionResult result =
      navigation_observer_manager->IdentifyReferrerChainByWebContents(
          web_contents, kExtensionReferrerUserGestureLimit, &referrer_chain);

  // If the referrer chain is incomplete we'll append the most recent
  // navigations to referrer chain for diagnostic purposes. This only happens if
  // the user is not in incognito mode and has opted into extended reporting or
  // Scout reporting. Otherwise, |CountOfRecentNavigationsToAppend| returns 0.
  int recent_navigations_to_collect =
      SafeBrowsingNavigationObserverManager::CountOfRecentNavigationsToAppend(
          *profile, result);
  if (recent_navigations_to_collect > 0) {
    navigation_observer_manager->AppendRecentNavigations(
        recent_navigations_to_collect, &referrer_chain);
  }

  safe_browsing::ExtensionWebStoreInstallRequest request;
  request.mutable_referrer_chain()->Swap(&referrer_chain);
  request.mutable_referrer_chain_options()->set_recent_navigations_to_collect(
      recent_navigations_to_collect);

  std::string serialized_referrer_proto = request.SerializeAsString();
  // Base64 encode the proto to avoid issues with base::Value rejecting strings
  // which are not valid UTF8.
  base::Base64Encode(serialized_referrer_proto, &serialized_referrer_proto);
  return RespondNow(
      ArgumentList(api::webstore_private::GetReferrerChain::Results::Create(
          serialized_referrer_proto)));
}

}  // namespace extensions