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// Copyright 2014 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/ui/app_list/speech_auth_helper.h"
#include <string>
#include "base/bind.h"
#include "base/time/clock.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
#include "chrome/browser/signin/signin_manager_factory.h"
#include "components/signin/core/browser/profile_oauth2_token_service.h"
#include "components/signin/core/browser/signin_manager.h"
#include "content/public/browser/browser_thread.h"
namespace app_list {
static const char* kAuthScope =
"https://www.googleapis.com/auth/webhistory";
static const int kMinTokenRefreshDelaySeconds = 300; // 5 minutes
SpeechAuthHelper::SpeechAuthHelper(Profile* profile, base::Clock* clock)
: OAuth2TokenService::Consumer(kAuthScope),
profile_(profile),
clock_(clock),
token_service_(ProfileOAuth2TokenServiceFactory::GetForProfile(profile)),
weak_factory_(this) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
// If token_service_ is NULL, we can't do anything. This might be NULL if the
// profile is a guest user.
if (!token_service_)
return;
SigninManagerBase* signin_manager =
SigninManagerFactory::GetForProfile(profile);
// Again, this might be NULL, and if it is, we can't proceed.
if (!signin_manager)
return;
authenticated_account_id_ = signin_manager->GetAuthenticatedAccountId();
if (!token_service_->RefreshTokenIsAvailable(authenticated_account_id_)) {
// Wait for the OAuth2 refresh token to be available before trying to obtain
// a speech token.
token_service_->AddObserver(this);
} else {
FetchAuthToken();
}
}
SpeechAuthHelper::~SpeechAuthHelper() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
if (token_service_)
token_service_->RemoveObserver(this);
}
void SpeechAuthHelper::OnGetTokenSuccess(
const OAuth2TokenService::Request* request,
const std::string& access_token,
const base::Time& expiration_time) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
auth_token_ = access_token;
auth_token_request_.reset();
base::Time now = clock_->Now();
base::TimeDelta delay = expiration_time - now;
if (delay.InSeconds() < kMinTokenRefreshDelaySeconds)
delay = base::TimeDelta::FromSeconds(kMinTokenRefreshDelaySeconds);
ScheduleTokenFetch(delay);
}
void SpeechAuthHelper::OnGetTokenFailure(
const OAuth2TokenService::Request* request,
const GoogleServiceAuthError& error) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
auth_token_ = "";
auth_token_request_.reset();
// Try again later.
// TODO(amistry): Implement backoff.
ScheduleTokenFetch(
base::TimeDelta::FromSeconds(kMinTokenRefreshDelaySeconds));
}
void SpeechAuthHelper::OnRefreshTokenAvailable(const std::string& account_id) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
if (authenticated_account_id_ == account_id)
FetchAuthToken();
}
void SpeechAuthHelper::ScheduleTokenFetch(const base::TimeDelta& fetch_delay) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
content::BrowserThread::PostDelayedTask(
content::BrowserThread::UI,
FROM_HERE,
base::Bind(&SpeechAuthHelper::FetchAuthToken,
weak_factory_.GetWeakPtr()),
fetch_delay);
}
void SpeechAuthHelper::FetchAuthToken() {
// The process of fetching and refreshing OAuth tokens is started from the
// consustructor, and so token_service_ and authenticated_account_id_ are
// guaranteed to be valid at this point.
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
OAuth2TokenService::ScopeSet scopes;
scopes.insert(kAuthScope);
auth_token_request_ = token_service_->StartRequest(
authenticated_account_id_,
scopes,
this);
}
std::string SpeechAuthHelper::GetToken() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
return auth_token_;
}
std::string SpeechAuthHelper::GetScope() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
return kAuthScope;
}
} // namespace app_list
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