// 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 CONTENT_BROWSER_PERMISSIONS_PERMISSION_SERVICE_CONTEXT_H_
#define CONTENT_BROWSER_PERMISSIONS_PERMISSION_SERVICE_CONTEXT_H_

#include "base/macros.h"
#include "base/memory/scoped_vector.h"
#include "content/public/browser/permission_type.h"
#include "content/public/browser/web_contents_observer.h"
#include "mojo/public/cpp/bindings/interface_request.h"

namespace blink {
namespace mojom {
class PermissionObserver;
class PermissionService;
}
}

namespace url {
class Origin;
}

namespace content {

class PermissionServiceImpl;
class RenderFrameHost;
class RenderProcessHost;

// Provides information to a PermissionService. It is used by the
// PermissionServiceImpl to handle request permission UI.
// There is one PermissionServiceContext per RenderFrameHost/RenderProcessHost
// which owns it. It then owns all PermissionServiceImpl associated to their
// owner.
class PermissionServiceContext : public WebContentsObserver {
 public:
  explicit PermissionServiceContext(RenderFrameHost* render_frame_host);
  explicit PermissionServiceContext(RenderProcessHost* render_process_host);
  ~PermissionServiceContext() override;

  void CreateService(
      mojo::InterfaceRequest<blink::mojom::PermissionService> request);

  void CreateSubscription(
      PermissionType permission_type,
      const url::Origin& origin,
      mojo::InterfacePtr<blink::mojom::PermissionObserver> observer);

  // Called by a PermissionServiceImpl identified as |service| when it has a
  // connection error in order to get unregistered and killed.
  void ServiceHadConnectionError(PermissionServiceImpl* service);

  // Called when the connection to a PermissionObserver has an error.
  void ObserverHadConnectionError(int subscription_id);

  BrowserContext* GetBrowserContext() const;
  GURL GetEmbeddingOrigin() const;

  RenderFrameHost* render_frame_host() const;
  RenderProcessHost* render_process_host() const {
    return render_process_host_;
  }

 private:
  class PermissionSubscription;

  // WebContentsObserver
  void RenderFrameHostChanged(RenderFrameHost* old_host,
                              RenderFrameHost* new_host) override;
  void FrameDeleted(RenderFrameHost* render_frame_host) override;
  void DidNavigateAnyFrame(RenderFrameHost* render_frame_host,
                           const LoadCommittedDetails& details,
                           const FrameNavigateParams& params) override;

  void CancelPendingOperations(RenderFrameHost*);

  RenderFrameHost* render_frame_host_;
  RenderProcessHost* render_process_host_;
  std::vector<std::unique_ptr<PermissionServiceImpl>> services_;
  std::unordered_map<int, std::unique_ptr<PermissionSubscription>>
      subscriptions_;

  DISALLOW_COPY_AND_ASSIGN(PermissionServiceContext);
};

}  // namespace content

#endif  // CONTENT_BROWSER_PERMISSIONS_PERMISSION_SERVICE_CONTEXT_H_