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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/extensions/settings/settings_frontend.h"
#include <limits>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/file_path.h"
#include "base/json/json_reader.h"
#include "chrome/browser/extensions/event_names.h"
#include "chrome/browser/extensions/event_router.h"
#include "chrome/browser/extensions/extension_service.h"
#include "chrome/browser/extensions/extension_system.h"
#include "chrome/browser/extensions/settings/leveldb_settings_storage_factory.h"
#include "chrome/browser/extensions/settings/settings_backend.h"
#include "chrome/browser/extensions/settings/sync_or_local_value_store_cache.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/extensions/api/storage.h"
#include "content/public/browser/browser_thread.h"
#if defined(ENABLE_CONFIGURATION_POLICY)
#include "chrome/browser/extensions/settings/managed_value_store_cache.h"
#endif
using content::BrowserThread;
namespace extensions {
namespace {
// Settings change Observer which forwards changes on to the extension
// processes for |profile| and its incognito partner if it exists.
class DefaultObserver : public SettingsObserver {
public:
explicit DefaultObserver(Profile* profile) : profile_(profile) {}
// SettingsObserver implementation.
virtual void OnSettingsChanged(
const std::string& extension_id,
settings_namespace::Namespace settings_namespace,
const std::string& change_json) OVERRIDE {
// TODO(gdk): This is a temporary hack while the refactoring for
// string-based event payloads is removed. http://crbug.com/136045
scoped_ptr<ListValue> args(new ListValue());
args->Append(base::JSONReader::Read(change_json));
args->Append(Value::CreateStringValue(settings_namespace::ToString(
settings_namespace)));
extensions::ExtensionSystem::Get(profile_)->event_router()->
DispatchEventToExtension(extension_id, event_names::kOnSettingsChanged,
args.Pass(), NULL, GURL());
}
private:
Profile* const profile_;
};
SettingsStorageQuotaEnforcer::Limits GetLocalLimits() {
SettingsStorageQuotaEnforcer::Limits limits = {
static_cast<size_t>(api::storage::local::QUOTA_BYTES),
std::numeric_limits<size_t>::max(),
std::numeric_limits<size_t>::max()
};
return limits;
}
SettingsStorageQuotaEnforcer::Limits GetSyncLimits() {
SettingsStorageQuotaEnforcer::Limits limits = {
static_cast<size_t>(api::storage::sync::QUOTA_BYTES),
static_cast<size_t>(api::storage::sync::QUOTA_BYTES_PER_ITEM),
static_cast<size_t>(api::storage::sync::MAX_ITEMS)
};
return limits;
}
} // namespace
// static
SettingsFrontend* SettingsFrontend::Create(Profile* profile) {
return new SettingsFrontend(new LeveldbSettingsStorageFactory(), profile);
}
// static
SettingsFrontend* SettingsFrontend::Create(
const scoped_refptr<SettingsStorageFactory>& storage_factory,
Profile* profile) {
return new SettingsFrontend(storage_factory, profile);
}
SettingsFrontend::SettingsFrontend(
const scoped_refptr<SettingsStorageFactory>& factory, Profile* profile)
: local_quota_limit_(GetLocalLimits()),
sync_quota_limit_(GetSyncLimits()),
profile_(profile),
observers_(new SettingsObserverList()),
profile_observer_(new DefaultObserver(profile)) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
DCHECK(!profile->IsOffTheRecord());
observers_->AddObserver(profile_observer_.get());
const FilePath& profile_path = profile->GetPath();
caches_[settings_namespace::LOCAL] =
new SyncOrLocalValueStoreCache(
settings_namespace::LOCAL,
factory,
local_quota_limit_,
observers_,
profile_path);
caches_[settings_namespace::SYNC] =
new SyncOrLocalValueStoreCache(
settings_namespace::SYNC,
factory,
sync_quota_limit_,
observers_,
profile_path);
#if defined(ENABLE_CONFIGURATION_POLICY)
caches_[settings_namespace::MANAGED] =
new ManagedValueStoreCache(profile->GetPolicyService(), observers_);
#endif
}
SettingsFrontend::~SettingsFrontend() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
observers_->RemoveObserver(profile_observer_.get());
// Destroy each cache in its preferred thread. The delete task will execute
// after any other task that might've been posted before.
for (CacheMap::iterator it = caches_.begin(); it != caches_.end(); ++it) {
ValueStoreCache* cache = it->second;
cache->ShutdownOnUI();
cache->GetMessageLoop()->DeleteSoon(FROM_HERE, cache);
}
}
syncer::SyncableService* SettingsFrontend::GetBackendForSync(
syncer::ModelType type) const {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
CacheMap::const_iterator it = caches_.find(settings_namespace::SYNC);
DCHECK(it != caches_.end());
const SyncOrLocalValueStoreCache* sync_cache =
static_cast<const SyncOrLocalValueStoreCache*>(it->second);
switch (type) {
case syncer::APP_SETTINGS:
return sync_cache->GetAppBackend();
case syncer::EXTENSION_SETTINGS:
return sync_cache->GetExtensionBackend();
default:
NOTREACHED();
return NULL;
}
}
bool SettingsFrontend::IsStorageEnabled(
settings_namespace::Namespace settings_namespace) const {
return caches_.find(settings_namespace) != caches_.end();
}
void SettingsFrontend::RunWithStorage(
const std::string& extension_id,
settings_namespace::Namespace settings_namespace,
const ValueStoreCache::StorageCallback& callback) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
ValueStoreCache* cache = caches_[settings_namespace];
CHECK(cache);
// The |extension| has already been referenced earlier in the stack, so it
// can't be gone here.
// TODO(kalman): change RunWithStorage() to take a
// scoped_refptr<const Extension> instead.
scoped_refptr<const Extension> extension =
extensions::ExtensionSystem::Get(profile_)->extension_service()->
GetExtensionById(extension_id, true);
CHECK(extension);
cache->GetMessageLoop()->PostTask(
FROM_HERE,
base::Bind(&ValueStoreCache::RunWithValueStoreForExtension,
base::Unretained(cache), callback, extension));
}
void SettingsFrontend::DeleteStorageSoon(
const std::string& extension_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
for (CacheMap::iterator it = caches_.begin(); it != caches_.end(); ++it) {
ValueStoreCache* cache = it->second;
cache->GetMessageLoop()->PostTask(
FROM_HERE,
base::Bind(&ValueStoreCache::DeleteStorageSoon,
base::Unretained(cache),
extension_id));
}
}
scoped_refptr<SettingsObserverList> SettingsFrontend::GetObservers() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
return observers_;
}
void SettingsFrontend::DisableStorageForTesting(
settings_namespace::Namespace settings_namespace) {
CacheMap::iterator it = caches_.find(settings_namespace);
if (it != caches_.end()) {
ValueStoreCache* cache = it->second;
cache->ShutdownOnUI();
cache->GetMessageLoop()->DeleteSoon(FROM_HERE, cache);
caches_.erase(it);
}
}
} // namespace extensions
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