// 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 CHROME_BROWSER_UI_INTERVENTIONS_FRAMEBUST_BLOCK_MESSAGE_DELEGATE_H_
#define CHROME_BROWSER_UI_INTERVENTIONS_FRAMEBUST_BLOCK_MESSAGE_DELEGATE_H_

#include "base/callback.h"
#include "base/macros.h"
#include "url/gurl.h"

#include "chrome/browser/ui/interventions/intervention_delegate.h"

namespace content {
class WebContents;
}

// Defines the messages shown to the user when the browser intervenes to block
// a framebust attempt, and provides a way to perform the blocked redirection
// if the user decides to do so.
class FramebustBlockMessageDelegate : public InterventionDelegate {
 public:
  // Describes the actions the user can take regarding this intervention, they
  // are provided through a callback the caller can pass to the delegate's
  // constructor.
  // This enum backs a histogram. Any updates should be reflected in enums.xml,
  // and new elements should only be appended to the end.
  enum class InterventionOutcome {
    kAccepted = 0,
    kDeclinedAndNavigated = 1,
    kMaxValue = kDeclinedAndNavigated
  };

  typedef base::OnceCallback<void(InterventionOutcome)> OutcomeCallback;

  // |intervention_callback| will be called when the user interacts with the
  // intervention message, see InterventionOutcome for possible values.
  FramebustBlockMessageDelegate(content::WebContents* web_contents,
                                const GURL& blocked_url,
                                OutcomeCallback intervention_callback);
  ~FramebustBlockMessageDelegate() override;

  const GURL& GetBlockedUrl() const;

  // InterventionDelegate:
  void AcceptIntervention() override;
  void DeclineIntervention() override;
  void DeclineInterventionWithReload() override;
  void DeclineInterventionSticky() override;

 private:
  // Callback to be called when the user performs an action regarding this
  // intervention.
  OutcomeCallback intervention_callback_;

  // WebContents associated with the frame that was targeted by the framebust.
  // Will be used to continue the navigation to the blocked URL.
  content::WebContents* web_contents_;

  // The URL that was the redirection target in the blocked framebust attempt.
  const GURL blocked_url_;

  DISALLOW_COPY_AND_ASSIGN(FramebustBlockMessageDelegate);
};

#endif  // CHROME_BROWSER_UI_INTERVENTIONS_FRAMEBUST_BLOCK_MESSAGE_DELEGATE_H_