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// Copyright 2017 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 EXTENSIONS_BROWSER_PRELOAD_CHECK_GROUP_H_
#define EXTENSIONS_BROWSER_PRELOAD_CHECK_GROUP_H_
#include <vector>
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/thread_checker.h"
#include "extensions/browser/preload_check.h"
namespace extensions {
// PreloadCheckGroup runs a collection of other PreloadChecks and reports their
// collective status once they have all finished. To stop the remaining checks
// upon hitting the first error, use set_stop_on_first_error().
class PreloadCheckGroup : public PreloadCheck {
public:
PreloadCheckGroup();
~PreloadCheckGroup() override;
// Adds a check to run. Not owned. Must be called before Start().
void AddCheck(PreloadCheck* check);
// PreloadCheck:
void Start(ResultCallback callback) override;
void set_stop_on_first_error(bool value) { stop_on_first_error_ = value; }
private:
// Saves any errors and may invoke the callback.
virtual void OnCheckComplete(const Errors& errors);
// Invokes the callback if the checks are considered finished.
void MaybeInvokeCallback();
base::ThreadChecker thread_checker_;
// If true, the callback is invoked early when the first check fails,
// stopping the remaining checks.
bool stop_on_first_error_ = false;
// Checks to run. Not owned.
std::vector<PreloadCheck*> checks_;
ResultCallback callback_;
int running_checks_ = 0;
Errors errors_;
base::WeakPtrFactory<PreloadCheckGroup> weak_ptr_factory_{this};
DISALLOW_COPY_AND_ASSIGN(PreloadCheckGroup);
};
} // namespace extensions
#endif // EXTENSIONS_BROWSER_PRELOAD_CHECK_GROUP_H_
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