// 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 Worklet_h
#define Worklet_h

#include "bindings/core/v8/ScriptPromise.h"
#include "bindings/core/v8/ScriptWrappable.h"
#include "core/CoreExport.h"
#include "core/dom/ActiveDOMObject.h"
#include "core/fetch/ScriptResource.h"
#include "platform/heap/Handle.h"

namespace blink {

class LocalFrame;
class ResourceFetcher;
class WorkletGlobalScopeProxy;
class WorkletScriptLoader;

class CORE_EXPORT Worklet : public GarbageCollectedFinalized<Worklet>, public ScriptWrappable, public ActiveDOMObject {
    DEFINE_WRAPPERTYPEINFO();
    USING_GARBAGE_COLLECTED_MIXIN(Worklet);
    WTF_MAKE_NONCOPYABLE(Worklet);
public:
    virtual void initialize() {}
    virtual bool isInitialized() const { return true; }

    virtual WorkletGlobalScopeProxy* workletGlobalScopeProxy() const = 0;

    // Worklet
    ScriptPromise import(ScriptState*, const String& url);

    void notifyFinished(WorkletScriptLoader*);

    // ActiveDOMObject
    void stop() final;

    DECLARE_VIRTUAL_TRACE();

protected:
    // The Worklet inherits the url and userAgent from the frame->document().
    explicit Worklet(LocalFrame*);

private:
    ResourceFetcher* fetcher() const { return m_fetcher.get(); }

    Member<ResourceFetcher> m_fetcher;
    HeapHashSet<Member<WorkletScriptLoader>> m_scriptLoaders;
};

} // namespace blink

#endif // Worklet_h