Componentize SafeBrowsingBlockingPage for WebView use

components/safe_browsing/base_blocking_page.h

+// Copyright 2017 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 COMPONENTS_SAFE_BROWSING_BASE_BLOCKING_PAGE_H_
+#define COMPONENTS_SAFE_BROWSING_BASE_BLOCKING_PAGE_H_
+
+#include <map>
+#include <string>
+#include <vector>
+
+#include "base/macros.h"
+#include "components/safe_browsing/base_ui_manager.h"
+#include "components/security_interstitials/content/security_interstitial_page.h"
+#include "components/security_interstitials/core/safe_browsing_error_ui.h"
+#include "content/public/browser/interstitial_page_delegate.h"
+#include "url/gurl.h"
+
+namespace history {
+class HistoryService;
+}
+
+namespace safe_browsing {
+
+// Base class for managing the SafeBrowsing interstitial pages.
+class BaseBlockingPage
+    : public security_interstitials::SecurityInterstitialPage {
+ public:
+  typedef security_interstitials::UnsafeResource UnsafeResource;
+  typedef security_interstitials::SafeBrowsingErrorUI SafeBrowsingErrorUI;
+  typedef std::vector<UnsafeResource> UnsafeResourceList;
+  typedef std::unordered_map<content::WebContents*, UnsafeResourceList>
+      UnsafeResourceMap;
+
+  ~BaseBlockingPage() override;
+
+  static const SafeBrowsingErrorUI::SBErrorDisplayOptions
+  CreateDefaultDisplayOptions(const UnsafeResourceList& unsafe_resources);
+
+  // Shows a blocking page warning the user about phishing/malware for a
+  // specific resource.
+  // This can be called several times. If an interstitial is already showing
+  // and the user decides to proceed, it will be discarded and a new one will be
+  // displayed.
+  static void ShowBlockingPage(BaseUIManager* ui_manager,
+                               const UnsafeResource& resource);
+
+  // Returns true if the passed |unsafe_resources| is blocking the load of
+  // the main page.
+  static bool IsMainPageLoadBlocked(const UnsafeResourceList& unsafe_resources);
+
+  // InterstitialPageDelegate methods:
+  void OnProceed() override;
+  void OnDontProceed() override;
+  void CommandReceived(const std::string& command) override;
+
+ protected:
+  // Don't instantiate this class directly, use ShowBlockingPage instead.
+  BaseBlockingPage(
+      BaseUIManager* ui_manager,
+      content::WebContents* web_contents,
+      const GURL& main_frame_url,
+      const UnsafeResourceList& unsafe_resources,
+      std::unique_ptr<
+          security_interstitials::SecurityInterstitialControllerClient>
+          controller_client,
+      const SafeBrowsingErrorUI::SBErrorDisplayOptions& display_options);
+
+  // SecurityInterstitialPage methods:
+  bool ShouldCreateNewNavigation() const override;
+  void PopulateInterstitialStrings(
+      base::DictionaryValue* load_time_data) override;
+
+  // Called when the interstitial is going away. Intentionally do nothing in
+  // this base class.
+  virtual void FinishThreatDetails(const base::TimeDelta& delay,
+                                   bool did_proceed,
+                                   int num_visits);
+
+  // A list of SafeBrowsingUIManager::UnsafeResource for a tab that the user
+  // should be warned about. They are queued when displaying more than one
+  // interstitial at a time.
+  static UnsafeResourceMap* GetUnsafeResourcesMap();
+
+  static std::string GetMetricPrefix(
+      const UnsafeResourceList& unsafe_resources,
+      SafeBrowsingErrorUI::SBInterstitialReason interstitial_reason);
+
+  static std::string GetExtraMetricsSuffix(
+      const UnsafeResourceList& unsafe_resources);
+
+  // Return the most severe interstitial reason from a list of unsafe resources.
+  // Severity ranking: malware > UwS (harmful) > phishing.
+  static SafeBrowsingErrorUI::SBInterstitialReason GetInterstitialReason(
+      const UnsafeResourceList& unsafe_resources);
+
+  BaseUIManager* ui_manager() const;
+
+  const GURL main_frame_url() const;
+
+  UnsafeResourceList unsafe_resources() const;
+
+  SafeBrowsingErrorUI* sb_error_ui() const;
+
+  void set_proceeded(bool proceeded);
+
+ private:
+  static std::unique_ptr<
+      security_interstitials::SecurityInterstitialControllerClient>
+  CreateControllerClient(content::WebContents* web_contents,
+                         const UnsafeResourceList& unsafe_resources,
+                         history::HistoryService* history_service,
+                         const std::string& app_locale,
+                         const GURL& default_safe_page);
+
+  // For reporting back user actions.
+  BaseUIManager* ui_manager_;
+
+  // The URL of the main frame that caused the warning.
+  GURL main_frame_url_;
+
+  // The index of a navigation entry that should be removed when DontProceed()
+  // is invoked, -1 if entry should not be removed.
+  const int navigation_entry_index_to_remove_;
+
+  // The list of unsafe resources this page is warning about.
+  UnsafeResourceList unsafe_resources_;
+
+  // For displaying safe browsing interstitial.
+  std::unique_ptr<SafeBrowsingErrorUI> sb_error_ui_;
+
+  // Indicate whether user has proceeded this blocking page.
+  bool proceeded_;
+
+  DISALLOW_COPY_AND_ASSIGN(BaseBlockingPage);
+};
+
+}  // namespace safe_browsing
+
+#endif  // COMPONENTS_SAFE_BROWSING_BASE_BLOCKING_PAGE_H_