chrome/browser/extensions/extension_error_reporter.h

// Copyright (c) 2011 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_BROWSER_EXTENSIONS_EXTENSION_ERROR_REPORTER_H_
#define CHROME_BROWSER_EXTENSIONS_EXTENSION_ERROR_REPORTER_H_

#include <string>
#include <vector>

#include "base/strings/string16.h"

namespace base {
class MessageLoop;
}

// Exposes an easy way for the various components of the extension system to
// report errors. This is a singleton that lives on the UI thread, with the
// exception of ReportError() which may be called from any thread.
// TODO(aa): Hook this up to about:extensions, when we have about:extensions.
// TODO(aa): Consider exposing directly, or via a helper, to the renderer
// process and plumbing the errors out to the browser.
// TODO(aa): Add ReportError(extension_id, message, be_noisy), so that we can
// report errors that are specific to a particular extension.
class ExtensionErrorReporter {
 public:
  // Initializes the error reporter. Must be called before any other methods
  // and on the UI thread.
  static void Init(bool enable_noisy_errors);

  // Get the singleton instance.
  static ExtensionErrorReporter* GetInstance();

  // Report an error. Errors always go to VLOG(1). Optionally, they can also
  // cause a noisy alert box. This method can be called from any thread.
  void ReportError(const string16& message, bool be_noisy);

  // Get the errors that have been reported so far.
  const std::vector<string16>* GetErrors();

  // Clear the list of errors reported so far.
  void ClearErrors();

 private:
  static ExtensionErrorReporter* instance_;

  explicit ExtensionErrorReporter(bool enable_noisy_errors);
  ~ExtensionErrorReporter();

  base::MessageLoop* ui_loop_;
  std::vector<string16> errors_;
  bool enable_noisy_errors_;
};

#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_ERROR_REPORTER_H_