// Copyright 2014 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 SHELL_APPLICATION_MANAGER_APPLICATION_LOADER_H_
#define SHELL_APPLICATION_MANAGER_APPLICATION_LOADER_H_

#include "base/callback.h"
#include "mojo/public/cpp/system/core.h"
#include "mojo/public/interfaces/application/shell.mojom.h"
#include "mojo/services/network/public/interfaces/url_loader.mojom.h"
#include "shell/application_manager/application_manager_export.h"
#include "url/gurl.h"

namespace mojo {

class Application;
class ApplicationManager;

// Interface to implement special application loading behavior for a particular
// URL or scheme.
class MOJO_APPLICATION_MANAGER_EXPORT ApplicationLoader {
 public:
  virtual ~ApplicationLoader() {}

  virtual void Load(const GURL& url,
                    InterfaceRequest<Application> application_request) = 0;

  // Called when the Application exits.
  virtual void OnApplicationError(ApplicationManager* manager,
                                  const GURL& url) = 0;

 protected:
  ApplicationLoader() {}
};

// TODO(aa): Remove this temporary interface. This is just here as a stepping
// stone, until I can tear apart NativeApplicationLoader into smaller pieces.
// See comments at top of shell/native_application_loader.h.

typedef base::Callback<void(const GURL& content_handler_url,
                            InterfaceRequest<Application> application_request,
                            URLResponsePtr url_request)> LoadCallback;

class NativeApplicationLoader {
 public:
  // Returns a callback that should never be called.
  static LoadCallback SimpleLoadCallback();

  virtual ~NativeApplicationLoader() {}

  virtual void Load(const GURL& url,
                    InterfaceRequest<Application> application_request,
                    LoadCallback callback) {}
};

}  // namespace mojo

#endif  // SHELL_APPLICATION_MANAGER_APPLICATION_LOADER_H_