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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_ASH_ARC_EXTENSIONS_ARC_SUPPORT_MESSAGE_HOST_H_
#define CHROME_BROWSER_ASH_ARC_EXTENSIONS_ARC_SUPPORT_MESSAGE_HOST_H_
#include <memory>
#include <string>
#include "base/memory/raw_ptr.h"
#include "base/task/single_thread_task_runner.h"
#include "base/values.h"
#include "content/public/browser/browser_context.h"
#include "extensions/browser/api/messaging/native_message_host.h"
namespace arc {
// Implements message routing to communicate with arc_support Chrome App.
// Provides JSON (base::Value) APIs for the communication.
class ArcSupportMessageHost : public extensions::NativeMessageHost {
public:
class Observer {
public:
// Called when an message is sent from arc_support Chrome App.
virtual void OnMessage(const base::Value::Dict& message) = 0;
protected:
virtual ~Observer() = default;
};
ArcSupportMessageHost(const ArcSupportMessageHost&) = delete;
ArcSupportMessageHost& operator=(const ArcSupportMessageHost&) = delete;
static constexpr char kHostName[] = "com.google.arc_support";
static constexpr const char* kHostOrigin[] = {
"chrome-extension://cnbgggchhmkkdmeppjobngjoejnihlei/"};
// Called when the arc_support connects the "port". Returns the
// instance of ArcSupportMessageHost.
static std::unique_ptr<NativeMessageHost> Create(
content::BrowserContext* browser_context);
~ArcSupportMessageHost() override;
// Sends a message to arc_support. If the client is not yet ready, the
// message will be just ignored.
void SendMessage(const base::ValueView& message);
// Registers (or unregisters if nullptr) the observer. Currently this class
// assumes that it has only one observer.
void SetObserver(Observer* observer);
private:
// Keep private. The instance will be created via Create().
ArcSupportMessageHost();
// extensions::NativeMessageHost overrides:
void Start(Client* client) override;
void OnMessage(const std::string& request_string) override;
scoped_refptr<base::SingleThreadTaskRunner> task_runner() const override;
raw_ptr<Observer> observer_ = nullptr;
raw_ptr<Client> client_ = nullptr;
};
} // namespace arc
#endif // CHROME_BROWSER_ASH_ARC_EXTENSIONS_ARC_SUPPORT_MESSAGE_HOST_H_
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