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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 "webkit/browser/appcache/appcache_quota_client.h"
#include <algorithm>
#include <map>
#include <set>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "webkit/browser/appcache/appcache_service.h"
using quota::QuotaClient;
namespace {
quota::QuotaStatusCode NetErrorCodeToQuotaStatus(int code) {
if (code == net::OK)
return quota::kQuotaStatusOk;
else if (code == net::ERR_ABORTED)
return quota::kQuotaErrorAbort;
else
return quota::kQuotaStatusUnknown;
}
void RunFront(appcache::AppCacheQuotaClient::RequestQueue* queue) {
base::Closure request = queue->front();
queue->pop_front();
request.Run();
}
} // namespace
namespace appcache {
AppCacheQuotaClient::AppCacheQuotaClient(AppCacheService* service)
: service_(service),
appcache_is_ready_(false),
quota_manager_is_destroyed_(false) {
}
AppCacheQuotaClient::~AppCacheQuotaClient() {
DCHECK(pending_batch_requests_.empty());
DCHECK(pending_serial_requests_.empty());
DCHECK(current_delete_request_callback_.is_null());
}
QuotaClient::ID AppCacheQuotaClient::id() const {
return kAppcache;
}
void AppCacheQuotaClient::OnQuotaManagerDestroyed() {
DeletePendingRequests();
if (!current_delete_request_callback_.is_null()) {
current_delete_request_callback_.Reset();
GetServiceDeleteCallback()->Cancel();
}
quota_manager_is_destroyed_ = true;
if (!service_)
delete this;
}
void AppCacheQuotaClient::GetOriginUsage(
const GURL& origin,
quota::StorageType type,
const GetUsageCallback& callback) {
DCHECK(!callback.is_null());
DCHECK(!quota_manager_is_destroyed_);
if (!service_) {
callback.Run(0);
return;
}
if (!appcache_is_ready_) {
pending_batch_requests_.push_back(
base::Bind(&AppCacheQuotaClient::GetOriginUsage,
base::Unretained(this), origin, type, callback));
return;
}
if (type != quota::kStorageTypeTemporary) {
callback.Run(0);
return;
}
const AppCacheStorage::UsageMap* map = GetUsageMap();
AppCacheStorage::UsageMap::const_iterator found = map->find(origin);
if (found == map->end()) {
callback.Run(0);
return;
}
callback.Run(found->second);
}
void AppCacheQuotaClient::GetOriginsForType(
quota::StorageType type,
const GetOriginsCallback& callback) {
GetOriginsHelper(type, std::string(), callback);
}
void AppCacheQuotaClient::GetOriginsForHost(
quota::StorageType type,
const std::string& host,
const GetOriginsCallback& callback) {
DCHECK(!callback.is_null());
if (host.empty()) {
callback.Run(std::set<GURL>());
return;
}
GetOriginsHelper(type, host, callback);
}
void AppCacheQuotaClient::DeleteOriginData(const GURL& origin,
quota::StorageType type,
const DeletionCallback& callback) {
DCHECK(!quota_manager_is_destroyed_);
if (!service_) {
callback.Run(quota::kQuotaErrorAbort);
return;
}
if (!appcache_is_ready_ || !current_delete_request_callback_.is_null()) {
pending_serial_requests_.push_back(
base::Bind(&AppCacheQuotaClient::DeleteOriginData,
base::Unretained(this), origin, type, callback));
return;
}
current_delete_request_callback_ = callback;
if (type != quota::kStorageTypeTemporary) {
DidDeleteAppCachesForOrigin(net::OK);
return;
}
service_->DeleteAppCachesForOrigin(
origin, GetServiceDeleteCallback()->callback());
}
void AppCacheQuotaClient::DidDeleteAppCachesForOrigin(int rv) {
DCHECK(service_);
if (quota_manager_is_destroyed_)
return;
// Finish the request by calling our callers callback.
current_delete_request_callback_.Run(NetErrorCodeToQuotaStatus(rv));
current_delete_request_callback_.Reset();
if (pending_serial_requests_.empty())
return;
// Start the next in the queue.
RunFront(&pending_serial_requests_);
}
void AppCacheQuotaClient::GetOriginsHelper(
quota::StorageType type,
const std::string& opt_host,
const GetOriginsCallback& callback) {
DCHECK(!callback.is_null());
DCHECK(!quota_manager_is_destroyed_);
if (!service_) {
callback.Run(std::set<GURL>());
return;
}
if (!appcache_is_ready_) {
pending_batch_requests_.push_back(
base::Bind(&AppCacheQuotaClient::GetOriginsHelper,
base::Unretained(this), type, opt_host, callback));
return;
}
if (type != quota::kStorageTypeTemporary) {
callback.Run(std::set<GURL>());
return;
}
const AppCacheStorage::UsageMap* map = GetUsageMap();
std::set<GURL> origins;
for (AppCacheStorage::UsageMap::const_iterator iter = map->begin();
iter != map->end(); ++iter) {
if (opt_host.empty() || iter->first.host() == opt_host)
origins.insert(iter->first);
}
callback.Run(origins);
}
void AppCacheQuotaClient::ProcessPendingRequests() {
DCHECK(appcache_is_ready_);
while (!pending_batch_requests_.empty())
RunFront(&pending_batch_requests_);
if (!pending_serial_requests_.empty())
RunFront(&pending_serial_requests_);
}
void AppCacheQuotaClient::DeletePendingRequests() {
pending_batch_requests_.clear();
pending_serial_requests_.clear();
}
const AppCacheStorage::UsageMap* AppCacheQuotaClient::GetUsageMap() {
DCHECK(service_);
return service_->storage()->usage_map();
}
net::CancelableCompletionCallback*
AppCacheQuotaClient::GetServiceDeleteCallback() {
// Lazily created due to CancelableCompletionCallback's threading
// restrictions, there is no way to detach from the thread created on.
if (!service_delete_callback_) {
service_delete_callback_.reset(
new net::CancelableCompletionCallback(
base::Bind(&AppCacheQuotaClient::DidDeleteAppCachesForOrigin,
base::Unretained(this))));
}
return service_delete_callback_.get();
}
void AppCacheQuotaClient::NotifyAppCacheReady() {
appcache_is_ready_ = true;
ProcessPendingRequests();
}
void AppCacheQuotaClient::NotifyAppCacheDestroyed() {
service_ = NULL;
while (!pending_batch_requests_.empty())
RunFront(&pending_batch_requests_);
while (!pending_serial_requests_.empty())
RunFront(&pending_serial_requests_);
if (!current_delete_request_callback_.is_null()) {
current_delete_request_callback_.Run(quota::kQuotaErrorAbort);
current_delete_request_callback_.Reset();
GetServiceDeleteCallback()->Cancel();
}
if (quota_manager_is_destroyed_)
delete this;
}
} // namespace appcache
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