// Copyright (c) 2012 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_LOADER_RESOURCE_REQUEST_INFO_IMPL_H_
#define CONTENT_BROWSER_LOADER_RESOURCE_REQUEST_INFO_IMPL_H_

#include <string>

#include "base/basictypes.h"
#include "base/gtest_prod_util.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/supports_user_data.h"
#include "content/public/browser/resource_request_info.h"
#include "content/public/common/referrer.h"
#include "content/public/common/resource_type.h"
#include "net/base/load_states.h"

namespace content {
class CrossSiteResourceHandler;
class DetachableResourceHandler;
class ResourceContext;
class ResourceMessageFilter;
struct GlobalRequestID;
struct GlobalRoutingID;

// Holds the data ResourceDispatcherHost associates with each request.
// Retrieve this data by calling ResourceDispatcherHost::InfoForRequest.
class ResourceRequestInfoImpl : public ResourceRequestInfo,
                                public base::SupportsUserData::Data {
 public:
  // Returns the ResourceRequestInfoImpl associated with the given URLRequest.
  CONTENT_EXPORT static ResourceRequestInfoImpl* ForRequest(
      net::URLRequest* request);

  // And, a const version for cases where you only need read access.
  CONTENT_EXPORT static const ResourceRequestInfoImpl* ForRequest(
      const net::URLRequest* request);

  CONTENT_EXPORT ResourceRequestInfoImpl(
      int process_type,
      int child_id,
      int route_id,
      int origin_pid,
      int request_id,
      int render_frame_id,
      bool is_main_frame,
      bool parent_is_main_frame,
      int parent_render_frame_id,
      ResourceType resource_type,
      ui::PageTransition transition_type,
      bool should_replace_current_entry,
      bool is_download,
      bool is_stream,
      bool allow_download,
      bool has_user_gesture,
      bool enable_load_timing,
      blink::WebReferrerPolicy referrer_policy,
      blink::WebPageVisibilityState visibility_state,
      ResourceContext* context,
      base::WeakPtr<ResourceMessageFilter> filter,
      bool is_async);
  ~ResourceRequestInfoImpl() override;

  // ResourceRequestInfo implementation:
  ResourceContext* GetContext() const override;
  int GetChildID() const override;
  int GetRouteID() const override;
  int GetOriginPID() const override;
  int GetRequestID() const override;
  int GetRenderFrameID() const override;
  bool IsMainFrame() const override;
  bool ParentIsMainFrame() const override;
  int GetParentRenderFrameID() const override;
  ResourceType GetResourceType() const override;
  int GetProcessType() const override;
  blink::WebReferrerPolicy GetReferrerPolicy() const override;
  blink::WebPageVisibilityState GetVisibilityState() const override;
  ui::PageTransition GetPageTransition() const override;
  bool HasUserGesture() const override;
  bool WasIgnoredByHandler() const override;
  bool GetAssociatedRenderFrame(int* render_process_id,
                                int* render_frame_id) const override;
  bool IsAsync() const override;
  bool IsDownload() const override;

  CONTENT_EXPORT void AssociateWithRequest(net::URLRequest* request);

  CONTENT_EXPORT GlobalRequestID GetGlobalRequestID() const;
  GlobalRoutingID GetGlobalRoutingID() const;

  // May be NULL (e.g., if process dies during a transfer).
  ResourceMessageFilter* filter() const {
    return filter_.get();
  }

  // Updates the data associated with this request after it is is transferred
  // to a new renderer process.  Not all data will change during a transfer.
  // We do not expect the ResourceContext to change during navigation, so that
  // does not need to be updated.
  void UpdateForTransfer(int child_id,
                         int route_id,
                         int origin_pid,
                         int request_id,
                         int parent_render_frame_id,
                         base::WeakPtr<ResourceMessageFilter> filter);

  // CrossSiteResourceHandler for this request.  May be null.
  CrossSiteResourceHandler* cross_site_handler() {
    return cross_site_handler_;
  }
  void set_cross_site_handler(CrossSiteResourceHandler* h) {
    cross_site_handler_ = h;
  }

  // Whether this request is part of a navigation that should replace the
  // current session history entry. This state is shuffled up and down the stack
  // for request transfers.
  bool should_replace_current_entry() const {
    return should_replace_current_entry_;
  }

  // DetachableResourceHandler for this request.  May be NULL.
  DetachableResourceHandler* detachable_handler() const {
    return detachable_handler_;
  }
  void set_detachable_handler(DetachableResourceHandler* h) {
    detachable_handler_ = h;
  }

  // Identifies the type of process (renderer, plugin, etc.) making the request.
  int process_type() const { return process_type_; }

  // Downloads are allowed only as a top level request.
  bool allow_download() const { return allow_download_; }

  // Whether this is a download.
  void set_is_download(bool download) { is_download_ = download; }

  // Whether this is a stream.
  bool is_stream() const { return is_stream_; }
  void set_is_stream(bool stream) { is_stream_ = stream; }

  void set_was_ignored_by_handler(bool value) {
    was_ignored_by_handler_ = value;
  }

  // Whether this request has been counted towards the number of in flight
  // requests, which is only true for requests that require a file descriptor
  // for their shared memory buffer.
  bool counted_as_in_flight_request() const {
    return counted_as_in_flight_request_;
  }
  void set_counted_as_in_flight_request(bool was_counted) {
    counted_as_in_flight_request_ = was_counted;
  }

  // The approximate in-memory size (bytes) that we credited this request
  // as consuming in |outstanding_requests_memory_cost_map_|.
  int memory_cost() const { return memory_cost_; }
  void set_memory_cost(int cost) { memory_cost_ = cost; }

  bool is_load_timing_enabled() const { return enable_load_timing_; }

 private:
  FRIEND_TEST_ALL_PREFIXES(ResourceDispatcherHostTest,
                           DeletedFilterDetached);
  FRIEND_TEST_ALL_PREFIXES(ResourceDispatcherHostTest,
                           DeletedFilterDetachedRedirect);
  // Non-owning, may be NULL.
  CrossSiteResourceHandler* cross_site_handler_;
  DetachableResourceHandler* detachable_handler_;

  int process_type_;
  int child_id_;
  int route_id_;
  int origin_pid_;
  int request_id_;
  int render_frame_id_;
  bool is_main_frame_;
  bool parent_is_main_frame_;
  int parent_render_frame_id_;
  bool should_replace_current_entry_;
  bool is_download_;
  bool is_stream_;
  bool allow_download_;
  bool has_user_gesture_;
  bool enable_load_timing_;
  bool was_ignored_by_handler_;
  bool counted_as_in_flight_request_;
  ResourceType resource_type_;
  ui::PageTransition transition_type_;
  int memory_cost_;
  blink::WebReferrerPolicy referrer_policy_;
  blink::WebPageVisibilityState visibility_state_;
  ResourceContext* context_;
  // The filter might be deleted without deleting this object if the process
  // exits during a transfer.
  base::WeakPtr<ResourceMessageFilter> filter_;
  bool is_async_;

  DISALLOW_COPY_AND_ASSIGN(ResourceRequestInfoImpl);
};

}  // namespace content

#endif  // CONTENT_BROWSER_LOADER_RESOURCE_REQUEST_INFO_IMPL_H_