third_party/WebKit/Source/modules/budget/BudgetService.h

// Copyright 2016 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 BudgetService_h
#define BudgetService_h

#include "bindings/core/v8/ScriptWrappable.h"
#include "modules/ModulesExport.h"
#include "public/platform/modules/budget_service/budget_service.mojom-blink.h"

namespace blink {

class ScriptPromise;
class ScriptPromiseResolver;
class ScriptState;

// This is the entry point into the browser for the BudgetService API, which is
// designed to give origins the ability to perform background operations
// on the user's behalf.
class BudgetService final : public GarbageCollectedFinalized<BudgetService>, public ScriptWrappable {
    DEFINE_WRAPPERTYPEINFO();

public:
    static BudgetService* create()
    {
        return new BudgetService();
    }

    ~BudgetService();

    // Implementation of the Budget API interface.
    ScriptPromise getCost(ScriptState*, const AtomicString& actionType);
    ScriptPromise getBudget(ScriptState*);

    DEFINE_INLINE_TRACE() {}

private:
    // Callbacks from the BudgetService to the blink layer.
    void gotCost(ScriptPromiseResolver*, double cost) const;
    void gotBudget(ScriptPromiseResolver*, const mojo::WTFArray<mojom::blink::BudgetStatePtr> expectations) const;

    // Error handler for use if mojo service doesn't connect.
    void onConnectionError();

    BudgetService();

    // Pointer to the Mojo service which will proxy calls to the browser.
    mojom::blink::BudgetServicePtr m_service;
};

} // namespace blink

#endif // BudgetService_h