chrome/browser/extensions/extension_error_reporter.h

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_ERROR_REPORTER_H_
   6 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_ERROR_REPORTER_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/strings/string16.h"
  12
  13 namespace base {
  14 class MessageLoop;
  15 class FilePath;
  16 }
  17
  18 class Profile;
  19
  20 // Exposes an easy way for the various components of the extension system to
  21 // report errors. This is a singleton that lives on the UI thread, with the
  22 // exception of ReportError() which may be called from any thread.
  23 // TODO(aa): Hook this up to about:extensions, when we have about:extensions.
  24 // TODO(aa): Consider exposing directly, or via a helper, to the renderer
  25 // process and plumbing the errors out to the browser.
  26 // TODO(aa): Add ReportError(extension_id, message, be_noisy), so that we can
  27 // report errors that are specific to a particular extension.
  28 class ExtensionErrorReporter {
  29  public:
  30   // Initializes the error reporter. Must be called before any other methods
  31   // and on the UI thread.
  32   static void Init(bool enable_noisy_errors);
  33
  34   // Get the singleton instance.
  35   static ExtensionErrorReporter* GetInstance();
  36
  37   // Report an extension load error. This forwards to ReportError() after
  38   // sending an EXTENSION_LOAD_ERROR notification.
  39   // TODO(rdevlin.cronin): There's a lot wrong with this. But some of our
  40   // systems rely on the notification. Investigate what it will take to remove
  41   // the notification and this method.
  42   void ReportLoadError(const base::FilePath& extension_path,
  43                        const std::string& error,
  44                        Profile* profile,
  45                        bool be_noisy);
  46
  47   // Report an error. Errors always go to VLOG(1). Optionally, they can also
  48   // cause a noisy alert box.
  49   void ReportError(const base::string16& message, bool be_noisy);
  50
  51   // Get the errors that have been reported so far.
  52   const std::vector<base::string16>* GetErrors();
  53
  54   // Clear the list of errors reported so far.
  55   void ClearErrors();
  56
  57  private:
  58   static ExtensionErrorReporter* instance_;
  59
  60   explicit ExtensionErrorReporter(bool enable_noisy_errors);
  61   ~ExtensionErrorReporter();
  62
  63   base::MessageLoop* ui_loop_;
  64   std::vector<base::string16> errors_;
  65   bool enable_noisy_errors_;
  66 };
  67
  68 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_ERROR_REPORTER_H_