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// Copyright (c) 2009 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/appcache/appcache_group.h"
#include <algorithm>
#include "base/logging.h"
#include "webkit/appcache/appcache.h"
#include "webkit/appcache/appcache_host.h"
#include "webkit/appcache/appcache_service.h"
#include "webkit/appcache/appcache_storage.h"
#include "webkit/appcache/appcache_update_job.h"
namespace appcache {
AppCacheGroup::AppCacheGroup(AppCacheService* service,
const GURL& manifest_url)
: manifest_url_(manifest_url),
update_status_(IDLE),
is_obsolete_(false),
newest_complete_cache_(NULL),
update_job_(NULL),
service_(service) {
service_->storage()->working_set()->AddGroup(this);
}
AppCacheGroup::~AppCacheGroup() {
DCHECK(old_caches_.empty());
DCHECK(!update_job_);
// Newest complete cache might never have been associated with a host
// and thus would not be cleaned up by the backend impl during shutdown.
if (newest_complete_cache_)
RemoveCache(newest_complete_cache_);
service_->storage()->working_set()->RemoveGroup(this);
}
void AppCacheGroup::AddObserver(Observer* observer) {
observers_.AddObserver(observer);
}
void AppCacheGroup::RemoveObserver(Observer* observer) {
observers_.RemoveObserver(observer);
}
void AppCacheGroup::AddCache(AppCache* complete_cache) {
DCHECK(complete_cache->is_complete());
if (!newest_complete_cache_) {
newest_complete_cache_ = complete_cache;
return;
}
if (complete_cache->IsNewerThan(newest_complete_cache_)) {
old_caches_.push_back(newest_complete_cache_);
newest_complete_cache_ = complete_cache;
} else {
old_caches_.push_back(complete_cache);
}
}
bool AppCacheGroup::RemoveCache(AppCache* cache) {
if (cache == newest_complete_cache_) {
// Cannot remove newest cache if there are older caches as those may
// eventually be swapped to the newest cache.
if (!old_caches_.empty())
return false;
newest_complete_cache_->set_owning_group(NULL);
newest_complete_cache_ = NULL;
} else {
// Unused old cache can always be removed.
Caches::iterator it =
std::find(old_caches_.begin(), old_caches_.end(), cache);
if (it != old_caches_.end()) {
(*it)->set_owning_group(NULL);
old_caches_.erase(it);
}
}
return true;
}
void AppCacheGroup::StartUpdateWithNewMasterEntry(
AppCacheHost* host, const GURL& new_master_resource) {
/* TODO(jennb): enable after have logic for cancelling an update
if (!update_job_)
update_job_ = new AppCacheUpdateJob(service_, this);
update_job_->StartUpdate(host, new_master_resource);
*/
}
void AppCacheGroup::SetUpdateStatus(UpdateStatus status) {
if (status == update_status_)
return;
update_status_ = status;
if (status != IDLE) {
DCHECK(update_job_);
} else {
update_job_ = NULL;
FOR_EACH_OBSERVER(Observer, observers_, OnUpdateComplete(this));
}
}
} // namespace appcache
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