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// Copyright 2011 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_EXTENSIONS_LOAD_ERROR_REPORTER_H_
#define CHROME_BROWSER_EXTENSIONS_LOAD_ERROR_REPORTER_H_
#include <string>
#include <vector>
#include "base/memory/scoped_refptr.h"
#include "base/observer_list.h"
#include "base/task/single_thread_task_runner.h"
#include "extensions/buildflags/buildflags.h"
static_assert(BUILDFLAG(ENABLE_EXTENSIONS_CORE));
namespace base {
class FilePath;
}
namespace content {
class BrowserContext;
}
namespace extensions {
// Exposes an easy way for the various components of the extension system to
// report load 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): Add ReportError(extension_id, message, be_noisy), so that we can
// report errors that are specific to a particular extension.
class LoadErrorReporter {
public:
class Observer {
public:
virtual ~Observer() = default;
// Called when an unpacked extension fails to load.
virtual void OnLoadFailure(content::BrowserContext* browser_context,
const base::FilePath& extension_path,
const std::string& error) = 0;
};
LoadErrorReporter(const LoadErrorReporter&) = delete;
LoadErrorReporter& operator=(const LoadErrorReporter&) = delete;
// 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 LoadErrorReporter* GetInstance();
// Report an extension load error. This forwards to ReportError() after
// sending an EXTENSION_LOAD_ERROR notification.
// TODO(rdevlin.cronin): There's a lot wrong with this. But some of our
// systems rely on the notification. Investigate what it will take to remove
// the notification and this method.
void ReportLoadError(const base::FilePath& extension_path,
const std::string& error,
content::BrowserContext* browser_context,
bool be_noisy);
// Report an error. Errors always go to VLOG(1). Optionally, they can also
// cause a noisy alert box.
void ReportError(const std::u16string& message, bool be_noisy);
// Get the errors that have been reported so far.
const std::vector<std::u16string>* GetErrors();
// Clear the list of errors reported so far.
void ClearErrors();
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
private:
static LoadErrorReporter* instance_;
explicit LoadErrorReporter(bool enable_noisy_errors);
~LoadErrorReporter();
scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner_;
std::vector<std::u16string> errors_;
bool enable_noisy_errors_;
base::ObserverList<Observer>::Unchecked observers_;
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_LOAD_ERROR_REPORTER_H_
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