// Copyright (c) 2013 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.

#ifndef SHELL_BROWSER_ELECTRON_BROWSER_CLIENT_H_
#define SHELL_BROWSER_ELECTRON_BROWSER_CLIENT_H_

#include <map>
#include <memory>
#include <set>
#include <string>
#include <vector>

#include "base/files/file_path.h"
#include "base/synchronization/lock.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/render_process_host_observer.h"
#include "content/public/browser/web_contents.h"
#include "electron/buildflags/buildflags.h"
#include "net/ssl/client_cert_identity.h"

namespace content {
class ClientCertificateDelegate;
class QuotaPermissionContext;
}  // namespace content

namespace net {
class SSLCertRequestInfo;
}

namespace electron {

class NotificationPresenter;
class PlatformNotificationService;

class ElectronBrowserClient : public content::ContentBrowserClient,
                              public content::RenderProcessHostObserver {
 public:
  static ElectronBrowserClient* Get();
  static void SetApplicationLocale(const std::string& locale);

  ElectronBrowserClient();
  ~ElectronBrowserClient() override;

  using Delegate = content::ContentBrowserClient;
  void set_delegate(Delegate* delegate) { delegate_ = delegate; }

  // Returns the WebContents for pending render processes.
  content::WebContents* GetWebContentsFromProcessID(int process_id);

  // Don't force renderer process to restart for once.
  static void SuppressRendererProcessRestartForOnce();

  NotificationPresenter* GetNotificationPresenter();

  void WebNotificationAllowed(int render_process_id,
                              base::OnceCallback<void(bool, bool)> callback);

  // content::NavigatorDelegate
  std::vector<std::unique_ptr<content::NavigationThrottle>>
  CreateThrottlesForNavigation(content::NavigationHandle* handle) override;

  // content::ContentBrowserClient:
  std::string GetApplicationLocale() override;
  base::FilePath GetFontLookupTableCacheDir() override;
  bool ShouldEnableStrictSiteIsolation() override;
  void BindHostReceiverForRenderer(
      content::RenderProcessHost* render_process_host,
      mojo::GenericPendingReceiver receiver) override;
  void RegisterBrowserInterfaceBindersForFrame(
      content::RenderFrameHost* render_frame_host,
      service_manager::BinderMapWithContext<content::RenderFrameHost*>* map)
      override;
#if defined(OS_LINUX)
  void GetAdditionalMappedFilesForChildProcess(
      const base::CommandLine& command_line,
      int child_process_id,
      content::PosixFileDescriptorInfo* mappings) override;
#endif

  std::string GetUserAgent() override;
  void SetUserAgent(const std::string& user_agent);

  void SetCanUseCustomSiteInstance(bool should_disable);
  bool CanUseCustomSiteInstance() override;

 protected:
  void RenderProcessWillLaunch(content::RenderProcessHost* host) override;
  content::SpeechRecognitionManagerDelegate*
  CreateSpeechRecognitionManagerDelegate() override;
  content::TtsControllerDelegate* GetTtsControllerDelegate() override;
  void OverrideWebkitPrefs(content::RenderViewHost* render_view_host,
                           content::WebPreferences* prefs) override;
  SiteInstanceForNavigationType ShouldOverrideSiteInstanceForNavigation(
      content::RenderFrameHost* current_rfh,
      content::RenderFrameHost* speculative_rfh,
      content::BrowserContext* browser_context,
      const GURL& url,
      bool has_navigation_started,
      bool has_request_started,
      content::SiteInstance** affinity_site_instance) const override;
  void RegisterPendingSiteInstance(
      content::RenderFrameHost* render_frame_host,
      content::SiteInstance* pending_site_instance) override;
  void AppendExtraCommandLineSwitches(base::CommandLine* command_line,
                                      int child_process_id) override;
  void DidCreatePpapiPlugin(content::BrowserPpapiHost* browser_host) override;
  std::string GetGeolocationApiKey() override;
  scoped_refptr<content::QuotaPermissionContext> CreateQuotaPermissionContext()
      override;
  content::GeneratedCodeCacheSettings GetGeneratedCodeCacheSettings(
      content::BrowserContext* context) override;
  void AllowCertificateError(
      content::WebContents* web_contents,
      int cert_error,
      const net::SSLInfo& ssl_info,
      const GURL& request_url,
      bool is_main_frame_request,
      bool strict_enforcement,
      base::OnceCallback<void(content::CertificateRequestResultType)> callback)
      override;
  base::OnceClosure SelectClientCertificate(
      content::WebContents* web_contents,
      net::SSLCertRequestInfo* cert_request_info,
      net::ClientCertIdentityList client_certs,
      std::unique_ptr<content::ClientCertificateDelegate> delegate) override;
  bool CanCreateWindow(content::RenderFrameHost* opener,
                       const GURL& opener_url,
                       const GURL& opener_top_level_frame_url,
                       const url::Origin& source_origin,
                       content::mojom::WindowContainerType container_type,
                       const GURL& target_url,
                       const content::Referrer& referrer,
                       const std::string& frame_name,
                       WindowOpenDisposition disposition,
                       const blink::mojom::WindowFeatures& features,
                       const std::vector<std::string>& additional_features,
                       const scoped_refptr<network::ResourceRequestBody>& body,
                       bool user_gesture,
                       bool opener_suppressed,
                       bool* no_javascript_access) override;
#if BUILDFLAG(ENABLE_PICTURE_IN_PICTURE)
  std::unique_ptr<content::OverlayWindow> CreateWindowForPictureInPicture(
      content::PictureInPictureWindowController* controller) override;
#endif
  void GetAdditionalAllowedSchemesForFileSystem(
      std::vector<std::string>* additional_schemes) override;
  void GetAdditionalWebUISchemes(
      std::vector<std::string>* additional_schemes) override;
  void SiteInstanceDeleting(content::SiteInstance* site_instance) override;
  std::unique_ptr<net::ClientCertStore> CreateClientCertStore(
      content::BrowserContext* browser_context) override;
  std::unique_ptr<device::LocationProvider> OverrideSystemLocationProvider()
      override;
  mojo::Remote<network::mojom::NetworkContext> CreateNetworkContext(
      content::BrowserContext* browser_context,
      bool in_memory,
      const base::FilePath& relative_partition_path) override;
  network::mojom::NetworkContext* GetSystemNetworkContext() override;
  base::Optional<service_manager::Manifest> GetServiceManifestOverlay(
      base::StringPiece name) override;
  content::MediaObserver* GetMediaObserver() override;
  content::DevToolsManagerDelegate* GetDevToolsManagerDelegate() override;
  content::PlatformNotificationService* GetPlatformNotificationService(
      content::BrowserContext* browser_context) override;
  std::unique_ptr<content::BrowserMainParts> CreateBrowserMainParts(
      const content::MainFunctionParams&) override;
  base::FilePath GetDefaultDownloadDirectory() override;
  scoped_refptr<network::SharedURLLoaderFactory>
  GetSystemSharedURLLoaderFactory() override;
  void OnNetworkServiceCreated(
      network::mojom::NetworkService* network_service) override;
  std::vector<base::FilePath> GetNetworkContextsParentDirectory() override;
  std::string GetProduct() override;
  void RegisterNonNetworkNavigationURLLoaderFactories(
      int frame_tree_node_id,
      NonNetworkURLLoaderFactoryMap* factories) override;
  void RegisterNonNetworkWorkerMainResourceURLLoaderFactories(
      content::BrowserContext* browser_context,
      NonNetworkURLLoaderFactoryMap* factories) override;
  void RegisterNonNetworkSubresourceURLLoaderFactories(
      int render_process_id,
      int render_frame_id,
      NonNetworkURLLoaderFactoryMap* factories) override;
  void CreateWebSocket(
      content::RenderFrameHost* frame,
      WebSocketFactory factory,
      const GURL& url,
      const net::SiteForCookies& site_for_cookies,
      const base::Optional<std::string>& user_agent,
      mojo::PendingRemote<network::mojom::WebSocketHandshakeClient>
          handshake_client) override;
  bool WillInterceptWebSocket(content::RenderFrameHost*) override;
  bool WillCreateURLLoaderFactory(
      content::BrowserContext* browser_context,
      content::RenderFrameHost* frame,
      int render_process_id,
      URLLoaderFactoryType type,
      const url::Origin& request_initiator,
      base::Optional<int64_t> navigation_id,
      mojo::PendingReceiver<network::mojom::URLLoaderFactory>* factory_receiver,
      mojo::PendingRemote<network::mojom::TrustedURLLoaderHeaderClient>*
          header_client,
      bool* bypass_redirect_checks,
      bool* disable_secure_dns,
      network::mojom::URLLoaderFactoryOverridePtr* factory_override) override;
  bool ShouldTreatURLSchemeAsFirstPartyWhenTopLevel(
      base::StringPiece scheme,
      bool is_embedded_origin_secure) override;
  void OverrideURLLoaderFactoryParams(
      content::BrowserContext* browser_context,
      const url::Origin& origin,
      bool is_for_isolated_world,
      network::mojom::URLLoaderFactoryParams* factory_params) override;
#if defined(OS_WIN)
  bool PreSpawnRenderer(sandbox::TargetPolicy* policy,
                        RendererSpawnFlags flags) override;
#endif
  bool BindAssociatedReceiverFromFrame(
      content::RenderFrameHost* render_frame_host,
      const std::string& interface_name,
      mojo::ScopedInterfaceEndpointHandle* handle) override;

  bool HandleExternalProtocol(
      const GURL& url,
      content::WebContents::OnceGetter web_contents_getter,
      int child_id,
      content::NavigationUIData* navigation_data,
      bool is_main_frame,
      ui::PageTransition page_transition,
      bool has_user_gesture,
      const base::Optional<url::Origin>& initiating_origin,
      mojo::PendingRemote<network::mojom::URLLoaderFactory>* out_factory)
      override;
  std::unique_ptr<content::LoginDelegate> CreateLoginDelegate(
      const net::AuthChallengeInfo& auth_info,
      content::WebContents* web_contents,
      const content::GlobalRequestID& request_id,
      bool is_main_frame,
      const GURL& url,
      scoped_refptr<net::HttpResponseHeaders> response_headers,
      bool first_auth_attempt,
      LoginAuthRequiredCallback auth_required_callback) override;
  void SiteInstanceGotProcess(content::SiteInstance* site_instance) override;
  bool IsSuitableHost(content::RenderProcessHost* process_host,
                      const GURL& site_url) override;
  bool ShouldUseProcessPerSite(content::BrowserContext* browser_context,
                               const GURL& effective_url) override;
  std::vector<std::unique_ptr<blink::URLLoaderThrottle>>
  CreateURLLoaderThrottles(
      const network::ResourceRequest& request,
      content::BrowserContext* browser_context,
      const base::RepeatingCallback<content::WebContents*()>& wc_getter,
      content::NavigationUIData* navigation_ui_data,
      int frame_tree_node_id) override;
  base::flat_set<std::string> GetPluginMimeTypesWithExternalHandlers(
      content::BrowserContext* browser_context) override;
  bool ArePersistentMediaDeviceIDsAllowed(
      content::BrowserContext* browser_context,
      const GURL& scope,
      const GURL& site_for_cookies,
      const base::Optional<url::Origin>& top_frame_origin) override;

  // content::RenderProcessHostObserver:
  void RenderProcessHostDestroyed(content::RenderProcessHost* host) override;
  void RenderProcessReady(content::RenderProcessHost* host) override;
  void RenderProcessExited(
      content::RenderProcessHost* host,
      const content::ChildProcessTerminationInfo& info) override;

 private:
  struct ProcessPreferences {
    bool sandbox = false;
    bool native_window_open = false;
    bool disable_popups = false;
    bool web_security = true;
    content::BrowserContext* browser_context = nullptr;
  };

  bool ShouldForceNewSiteInstance(content::RenderFrameHost* current_rfh,
                                  content::RenderFrameHost* speculative_rfh,
                                  content::BrowserContext* browser_context,
                                  const GURL& dest_url,
                                  bool has_request_started) const;
  bool NavigationWasRedirectedCrossSite(
      content::BrowserContext* browser_context,
      content::SiteInstance* current_instance,
      content::SiteInstance* speculative_instance,
      const GURL& dest_url,
      bool has_request_started) const;
  void AddProcessPreferences(int process_id, ProcessPreferences prefs);
  void RemoveProcessPreferences(int process_id);
  bool IsProcessObserved(int process_id) const;
  bool IsRendererSandboxed(int process_id) const;
  bool RendererUsesNativeWindowOpen(int process_id) const;
  bool RendererDisablesPopups(int process_id) const;
  std::string GetAffinityPreference(content::RenderFrameHost* rfh) const;
  content::SiteInstance* GetSiteInstanceFromAffinity(
      content::BrowserContext* browser_context,
      const GURL& url,
      content::RenderFrameHost* rfh) const;
  void ConsiderSiteInstanceForAffinity(content::RenderFrameHost* rfh,
                                       content::SiteInstance* site_instance);

  bool IsRendererSubFrame(int process_id) const;

  // pending_render_process => web contents.
  std::map<int, content::WebContents*> pending_processes_;

  std::map<int, base::ProcessId> render_process_host_pids_;

  std::set<int> renderer_is_subframe_;

  // list of site per affinity. weak_ptr to prevent instance locking
  std::map<std::string, content::SiteInstance*> site_per_affinities_;

  std::unique_ptr<PlatformNotificationService> notification_service_;
  std::unique_ptr<NotificationPresenter> notification_presenter_;

  Delegate* delegate_ = nullptr;

  std::map<int, ProcessPreferences> process_preferences_;

  std::string user_agent_override_ = "";

  bool disable_process_restart_tricks_ = true;

  // Simple shared ID generator, used by ProxyingURLLoaderFactory and
  // ProxyingWebSocket classes.
  uint64_t next_id_ = 0;

  DISALLOW_COPY_AND_ASSIGN(ElectronBrowserClient);
};

}  // namespace electron

#endif  // SHELL_BROWSER_ELECTRON_BROWSER_CLIENT_H_
