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// Copyright 2018 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.
#ifndef SERVICES_NETWORK_CONDITIONAL_CACHE_DELETION_HELPER_H_
#define SERVICES_NETWORK_CONDITIONAL_CACHE_DELETION_HELPER_H_
#include <memory>
#include "base/callback_forward.h"
#include "base/memory/weak_ptr.h"
#include "base/sequenced_task_runner_helpers.h"
#include "net/base/net_errors.h"
#include "net/disk_cache/disk_cache.h"
#include "url/gurl.h"
namespace disk_cache {
class Entry;
}
namespace network {
// Helper to remove HTTP cache data.
class ConditionalCacheDeletionHelper {
public:
// Creates a helper to delete |cache| entries whose last modified time is
// between |begin_time| (inclusively), |end_time| (exclusively) and whose URL
// is matched by the |url_matcher|. Note that |begin_time| and |end_time| can
// be null to indicate unbounded time interval in their respective direction.
// Starts the deletion and calls |completion_callback| when done.
static std::unique_ptr<ConditionalCacheDeletionHelper> CreateAndStart(
disk_cache::Backend* cache,
const base::RepeatingCallback<bool(const GURL&)>& url_matcher,
const base::Time& begin_time,
const base::Time& end_time,
base::OnceClosure completion_callback);
~ConditionalCacheDeletionHelper();
private:
ConditionalCacheDeletionHelper(
const base::RepeatingCallback<bool(const disk_cache::Entry*)>& condition,
base::OnceClosure completion_callback,
std::unique_ptr<disk_cache::Backend::Iterator> iterator);
void IterateOverEntries(int error);
void NotifyCompletion();
const base::RepeatingCallback<bool(const disk_cache::Entry*)> condition_;
base::OnceClosure completion_callback_;
std::unique_ptr<disk_cache::Backend::Iterator> iterator_;
disk_cache::Entry* current_entry_ = nullptr;
disk_cache::Entry* previous_entry_ = nullptr;
base::WeakPtrFactory<ConditionalCacheDeletionHelper> weak_factory_{this};
DISALLOW_COPY_AND_ASSIGN(ConditionalCacheDeletionHelper);
};
} // namespace network
#endif // SERVICES_NETWORK_CONDITIONAL_CACHE_DELETION_HELPER_H_