1// Copyright 2014 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/chromeos/login/signin/merge_session_xhr_request_waiter.h"
6
7#include "base/bind.h"
8#include "base/lazy_instance.h"
9#include "base/logging.h"
10#include "base/memory/weak_ptr.h"
11#include "base/message_loop/message_loop.h"
12#include "chrome/browser/chromeos/login/signin/oauth2_login_manager.h"
13#include "chrome/browser/chromeos/login/signin/oauth2_login_manager_factory.h"
14#include "content/public/browser/browser_thread.h"
15
16using content::BrowserThread;
17
18namespace chromeos {
19
20namespace {
21
22// Maximum time for delaying XHR requests.
23const int kMaxRequestWaitTimeMS = 10000;
24
25}
26
27MergeSessionXHRRequestWaiter::MergeSessionXHRRequestWaiter(
28    Profile* profile,
29    const MergeSessionThrottle::CompletionCallback& callback)
30   : profile_(profile),
31     callback_(callback),
32     weak_ptr_factory_(this) {
33}
34
35MergeSessionXHRRequestWaiter::~MergeSessionXHRRequestWaiter() {
36  chromeos::OAuth2LoginManager* manager =
37      chromeos::OAuth2LoginManagerFactory::GetInstance()->GetForProfile(
38          profile_);
39  if (manager)
40    manager->RemoveObserver(this);
41}
42
43void MergeSessionXHRRequestWaiter::StartWaiting() {
44  OAuth2LoginManager* manager =
45      OAuth2LoginManagerFactory::GetInstance()->GetForProfile(profile_);
46  if (manager && manager->ShouldBlockTabLoading()) {
47    DVLOG(1) << "Waiting for XHR request throttle";
48    manager->AddObserver(this);
49    BrowserThread::PostDelayedTask(
50        BrowserThread::UI, FROM_HERE,
51        base::Bind(&MergeSessionXHRRequestWaiter::OnTimeout,
52                   weak_ptr_factory_.GetWeakPtr()),
53        base::TimeDelta::FromMilliseconds(kMaxRequestWaitTimeMS));
54  } else {
55    NotifyBlockingDone();
56  }
57}
58
59void MergeSessionXHRRequestWaiter::OnSessionRestoreStateChanged(
60    Profile* user_profile,
61    OAuth2LoginManager::SessionRestoreState state) {
62  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
63
64  OAuth2LoginManager* manager =
65      OAuth2LoginManagerFactory::GetInstance()->GetForProfile(profile_);
66  DVLOG(1) << "Merge session throttle should "
67           << (!manager->ShouldBlockTabLoading() ?
68                  " NOT" : "")
69           << " be blocking now, "
70           << state;
71  if (!manager->ShouldBlockTabLoading()) {
72    DVLOG(1) << "Unblocking XHR request throttle due to session merge";
73    manager->RemoveObserver(this);
74    NotifyBlockingDone();
75  }
76}
77
78void MergeSessionXHRRequestWaiter::OnTimeout() {
79  DVLOG(1) << "Unblocking XHR request throttle due to timeout";
80  NotifyBlockingDone();
81}
82
83void MergeSessionXHRRequestWaiter::NotifyBlockingDone() {
84  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
85  if (!callback_.is_null()) {
86    BrowserThread::PostTask(
87        BrowserThread::IO, FROM_HERE, callback_);
88  }
89  weak_ptr_factory_.InvalidateWeakPtrs();
90  base::MessageLoop::current()->DeleteSoon(FROM_HERE, this);
91}
92
93}  // namespace chromeos
94