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// 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_SETTINGS_OBSERVER_QT_H
#define CONTENT_SETTINGS_OBSERVER_QT_H

#include "base/containers/flat_map.h"
#include "content/public/renderer/render_frame_observer.h"
#include "content/public/renderer/render_frame_observer_tracker.h"
#include "third_party/blink/public/platform/web_content_settings_client.h"
#include "url/gurl.h"

namespace blink {
class WebContentSettingCallbacks;
class WebSecurityOrigin;
}

namespace QtWebEngineCore {

// Handles blocking content per content settings for each RenderFrame.
class ContentSettingsObserverQt
        : public content::RenderFrameObserver
        , public content::RenderFrameObserverTracker<ContentSettingsObserverQt>
        , public blink::WebContentSettingsClient
{
public:
    ContentSettingsObserverQt(content::RenderFrame *render_frame);
    ~ContentSettingsObserverQt() override;

    // blink::WebContentSettingsClient:
    bool AllowDatabase(const blink::WebString &name,
                       const blink::WebString &display_name,
                       unsigned estimated_size) override;
    void RequestFileSystemAccessAsync(const blink::WebContentSettingCallbacks &callbacks) override;
    bool AllowIndexedDB(const blink::WebString &name,
                        const blink::WebSecurityOrigin &origin) override;
    bool AllowStorage(bool local) override;

private:

    // RenderFrameObserver implementation:
    bool OnMessageReceived(const IPC::Message &message) override;
    void DidCommitProvisionalLoad(bool is_new_navigation,
                                  bool is_same_document_navigation) override;
    void OnDestruct() override;

    // Message handlers.
    void OnRequestFileSystemAccessAsyncResponse(int request_id, bool allowed);

    // Clears m_cachedStoragePermissions
    void ClearBlockedContentSettings();

    // Caches the result of AllowStorage.
    using StoragePermissionsKey = std::pair<GURL, bool>;
    base::flat_map<StoragePermissionsKey, bool> m_cachedStoragePermissions;

    int m_currentRequestId;
    base::flat_map<int, blink::WebContentSettingCallbacks> m_permissionRequests;

    DISALLOW_COPY_AND_ASSIGN(ContentSettingsObserverQt);
};

} // namespace QtWebEngineCore

#endif  // RENDERER_CONTENT_SETTINGS_OBSERVER_QT_H