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// 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/sync/glue/password_change_processor.h"
#include <string>
#include "base/location.h"
#include "base/string_util.h"
#include "base/utf_string_conversions.h"
#include "chrome/browser/password_manager/password_store.h"
#include "chrome/browser/password_manager/password_store_change.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/sync/glue/password_model_associator.h"
#include "chrome/browser/sync/profile_sync_service.h"
#include "chrome/common/chrome_notification_types.h"
#include "chrome/common/chrome_notification_types.h"
#include "content/public/browser/notification_details.h"
#include "content/public/browser/notification_source.h"
#include "sync/internal_api/public/change_record.h"
#include "sync/internal_api/public/read_node.h"
#include "sync/internal_api/public/write_node.h"
#include "sync/internal_api/public/write_transaction.h"
#include "sync/protocol/password_specifics.pb.h"
#include "webkit/forms/password_form.h"
using content::BrowserThread;
namespace browser_sync {
PasswordChangeProcessor::PasswordChangeProcessor(
PasswordModelAssociator* model_associator,
PasswordStore* password_store,
DataTypeErrorHandler* error_handler)
: ChangeProcessor(error_handler),
model_associator_(model_associator),
password_store_(password_store),
observing_(false),
expected_loop_(MessageLoop::current()) {
DCHECK(model_associator);
DCHECK(error_handler);
#if defined(OS_MACOSX)
DCHECK(!BrowserThread::CurrentlyOn(BrowserThread::UI));
#else
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::DB));
#endif
StartObserving();
}
PasswordChangeProcessor::~PasswordChangeProcessor() {
DCHECK(expected_loop_ == MessageLoop::current());
}
void PasswordChangeProcessor::Observe(
int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) {
DCHECK(expected_loop_ == MessageLoop::current());
DCHECK(chrome::NOTIFICATION_LOGINS_CHANGED == type);
if (!observing_)
return;
DCHECK(running());
syncer::WriteTransaction trans(FROM_HERE, share_handle());
syncer::ReadNode password_root(&trans);
if (password_root.InitByTagLookup(kPasswordTag) !=
syncer::BaseNode::INIT_OK) {
error_handler()->OnSingleDatatypeUnrecoverableError(FROM_HERE,
"Server did not create the top-level password node. "
"We might be running against an out-of-date server.");
return;
}
PasswordStoreChangeList* changes =
content::Details<PasswordStoreChangeList>(details).ptr();
for (PasswordStoreChangeList::iterator change = changes->begin();
change != changes->end(); ++change) {
std::string tag = PasswordModelAssociator::MakeTag(change->form());
switch (change->type()) {
case PasswordStoreChange::ADD: {
syncer::WriteNode sync_node(&trans);
syncer::WriteNode::InitUniqueByCreationResult result =
sync_node.InitUniqueByCreation(syncable::PASSWORDS, password_root,
tag);
if (result == syncer::WriteNode::INIT_SUCCESS) {
PasswordModelAssociator::WriteToSyncNode(change->form(), &sync_node);
model_associator_->Associate(&tag, sync_node.GetId());
break;
} else {
// Maybe this node already exists and we should update it.
//
// If the PasswordStore is told to add an entry but an entry with the
// same name already exists, it will overwrite it. It will report
// this change as an ADD rather than an UPDATE. Ideally, it would be
// able to tell us what action was actually taken, rather than what
// action was requested. If it did so, we wouldn't need to fall back
// to trying to update an existing password node here.
//
// TODO: Remove this. See crbug.com/87855.
int64 sync_id = model_associator_->GetSyncIdFromChromeId(tag);
if (syncer::kInvalidId == sync_id) {
error_handler()->OnSingleDatatypeUnrecoverableError(FROM_HERE,
"Unable to create or retrieve password node");
LOG(ERROR) << "Invalid sync id.";
return;
}
if (sync_node.InitByIdLookup(sync_id) !=
syncer::BaseNode::INIT_OK) {
error_handler()->OnSingleDatatypeUnrecoverableError(FROM_HERE,
"Password node lookup failed.");
LOG(ERROR) << "Password node lookup failed.";
return;
}
PasswordModelAssociator::WriteToSyncNode(change->form(), &sync_node);
break;
}
}
case PasswordStoreChange::UPDATE: {
syncer::WriteNode sync_node(&trans);
int64 sync_id = model_associator_->GetSyncIdFromChromeId(tag);
if (syncer::kInvalidId == sync_id) {
error_handler()->OnSingleDatatypeUnrecoverableError(FROM_HERE,
"Invalid sync id");
LOG(ERROR) << "Invalid sync id.";
return;
} else {
if (sync_node.InitByIdLookup(sync_id) !=
syncer::BaseNode::INIT_OK) {
error_handler()->OnSingleDatatypeUnrecoverableError(FROM_HERE,
"Password node lookup failed.");
LOG(ERROR) << "Password node lookup failed.";
return;
}
}
PasswordModelAssociator::WriteToSyncNode(change->form(), &sync_node);
break;
}
case PasswordStoreChange::REMOVE: {
syncer::WriteNode sync_node(&trans);
int64 sync_id = model_associator_->GetSyncIdFromChromeId(tag);
if (syncer::kInvalidId == sync_id) {
// We've been asked to remove a password that we don't know about.
// That's weird, but apparently we were already in the requested
// state, so it's not really an unrecoverable error. Just return.
LOG(WARNING) << "Trying to delete nonexistent password sync node!";
return;
} else {
if (sync_node.InitByIdLookup(sync_id) !=
syncer::BaseNode::INIT_OK) {
error_handler()->OnSingleDatatypeUnrecoverableError(FROM_HERE,
"Password node lookup failed.");
return;
}
model_associator_->Disassociate(sync_node.GetId());
sync_node.Remove();
}
break;
}
}
}
}
void PasswordChangeProcessor::ApplyChangesFromSyncModel(
const syncer::BaseTransaction* trans,
const syncer::ImmutableChangeRecordList& changes) {
DCHECK(expected_loop_ == MessageLoop::current());
if (!running())
return;
syncer::ReadNode password_root(trans);
if (password_root.InitByTagLookup(kPasswordTag) !=
syncer::BaseNode::INIT_OK) {
error_handler()->OnSingleDatatypeUnrecoverableError(FROM_HERE,
"Password root node lookup failed.");
return;
}
DCHECK(deleted_passwords_.empty() && new_passwords_.empty() &&
updated_passwords_.empty());
for (syncer::ChangeRecordList::const_iterator it =
changes.Get().begin(); it != changes.Get().end(); ++it) {
if (syncer::ChangeRecord::ACTION_DELETE ==
it->action) {
DCHECK(it->specifics.has_password())
<< "Password specifics data not present on delete!";
DCHECK(it->extra.get());
syncer::ExtraPasswordChangeRecordData* extra =
it->extra.get();
const sync_pb::PasswordSpecificsData& password = extra->unencrypted();
webkit::forms::PasswordForm form;
PasswordModelAssociator::CopyPassword(password, &form);
deleted_passwords_.push_back(form);
model_associator_->Disassociate(it->id);
continue;
}
syncer::ReadNode sync_node(trans);
if (sync_node.InitByIdLookup(it->id) != syncer::BaseNode::INIT_OK) {
error_handler()->OnSingleDatatypeUnrecoverableError(FROM_HERE,
"Password node lookup failed.");
return;
}
// Check that the changed node is a child of the passwords folder.
DCHECK_EQ(password_root.GetId(), sync_node.GetParentId());
DCHECK_EQ(syncable::PASSWORDS, sync_node.GetModelType());
const sync_pb::PasswordSpecificsData& password_data =
sync_node.GetPasswordSpecifics();
webkit::forms::PasswordForm password;
PasswordModelAssociator::CopyPassword(password_data, &password);
if (syncer::ChangeRecord::ACTION_ADD == it->action) {
std::string tag(PasswordModelAssociator::MakeTag(password));
model_associator_->Associate(&tag, sync_node.GetId());
new_passwords_.push_back(password);
} else {
DCHECK_EQ(syncer::ChangeRecord::ACTION_UPDATE, it->action);
updated_passwords_.push_back(password);
}
}
}
void PasswordChangeProcessor::CommitChangesFromSyncModel() {
DCHECK(expected_loop_ == MessageLoop::current());
if (!running())
return;
ScopedStopObserving<PasswordChangeProcessor> stop_observing(this);
syncer::SyncError error = model_associator_->WriteToPasswordStore(
&new_passwords_,
&updated_passwords_,
&deleted_passwords_);
if (error.IsSet()) {
error_handler()->OnSingleDatatypeUnrecoverableError(FROM_HERE,
"Error writing passwords");
return;
}
deleted_passwords_.clear();
new_passwords_.clear();
updated_passwords_.clear();
}
void PasswordChangeProcessor::StartImpl(Profile* profile) {
DCHECK(expected_loop_ == MessageLoop::current());
observing_ = true;
}
void PasswordChangeProcessor::StopImpl() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
observing_ = false;
}
void PasswordChangeProcessor::StartObserving() {
DCHECK(expected_loop_ == MessageLoop::current());
notification_registrar_.Add(this,
chrome::NOTIFICATION_LOGINS_CHANGED,
content::Source<PasswordStore>(password_store_));
}
void PasswordChangeProcessor::StopObserving() {
DCHECK(expected_loop_ == MessageLoop::current());
notification_registrar_.Remove(
this,
chrome::NOTIFICATION_LOGINS_CHANGED,
content::Source<PasswordStore>(password_store_));
}
} // namespace browser_sync
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