chrome/renderer/extensions/api_activity_logger.h

// Copyright (c) 2013 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 CHROME_RENDERER_EXTENSIONS_API_ACTIVITY_LOGGER_H_
#define CHROME_RENDERER_EXTENSIONS_API_ACTIVITY_LOGGER_H_

#include <string>
#include "chrome/renderer/extensions/chrome_v8_extension.h"
#include "chrome/renderer/extensions/dispatcher.h"
#include "extensions/common/features/feature.h"
#include "v8/include/v8.h"

namespace extensions {

// Used to log extension API calls and events that are implemented with custom
// bindings.The actions are sent via IPC to extensions::ActivityLog for
// recording and display.
class APIActivityLogger : public ChromeV8Extension {
 public:
  APIActivityLogger(Dispatcher* dispatcher, ChromeV8Context* context);

 private:
   // Used to distinguish API calls & events from each other in LogInternal.
   enum CallType {
     APICALL,
     EVENT
   };

   // This is ultimately invoked in bindings.js with JavaScript arguments.
   //    arg0 - extension ID as a string
   //    arg1 - API call name as a string
   //    arg2 - arguments to the API call
   //    arg3 - any extra logging info as a string (optional)
   static void LogAPICall(const v8::FunctionCallbackInfo<v8::Value>& args);

   // This is ultimately invoked in bindings.js with JavaScript arguments.
   //    arg0 - extension ID as a string
   //    arg1 - Event name as a string
   //    arg2 - Event arguments
   //    arg3 - any extra logging info as a string (optional)
   static void LogEvent(const v8::FunctionCallbackInfo<v8::Value>& args);

   // LogAPICall and LogEvent are really the same underneath except for
   // how they are ultimately dispatched to the log.
   static void LogInternal(const CallType call_type,
                           const v8::FunctionCallbackInfo<v8::Value>& args);

  DISALLOW_COPY_AND_ASSIGN(APIActivityLogger);
};

}  // namespace extensions

#endif  // CHROME_RENDERER_EXTENSIONS_API_ACTIVITY_LOGGER_H_