/*******************************************************************************
 **
 ** smolbote: yet another qute browser
 ** Copyright (C) 2017  Xian Nox
 **
 ** This program is free software: you can redistribute it and/or modify
 ** it under the terms of the GNU General Public License as published by
 ** the Free Software Foundation, either version 3 of the License, or
 ** (at your option) any later version.
 **
 ** This program is distributed in the hope that it will be useful,
 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 ** GNU General Public License for more details.
 **
 ** You should have received a copy of the GNU General Public License
 ** along with this program.  If not, see <http://www.gnu.org/licenses/>.
 **
 ******************************************************************************/

#ifndef FILTERNODE_H
#define FILTERNODE_H

#include <QList>
#include <QVariant>
#include <QUrl>
#include "regexp.h"
#include <QWebEngineUrlRequestInfo>

class Filter
{
public:

    enum ResourceType {
        NoType = 0,
        MainFrame = 1,
        SubFrame = 2,
        Stylesheet = 4,
        Script = 8,
        Image = 16,
        Font = 32,
        SubResource = 64,
        Object = 128,
        Media = 256,
        Worker = 512,
        SharedWorker = 1024,
        Prefetch = 2048,
        Favicon = 4096,
        Xhr = 8192,
        Ping = 16384,
        ServiceWorker = 32768,
        CspReport = 65536,
        PluginResource = 131072,
        Unknown = 262144
    };
    Q_DECLARE_FLAGS(Resources, ResourceType)

    struct ResourceRules {
        Resources allowed;
        Resources blocked;
    };

    explicit Filter(const QString &domain, const QString &request, ResourceRules rules, bool shouldBlock, Filter *parentItem = 0);
    ~Filter();

    void enable();

    Filter *parentItem();

    // children
    void appendChild(Filter *child);
    Filter *child(int row);
    int childCount() const;

    // data
    QString domain() const;
    QString request() const;
    bool isBlocking();
    QString allowedTypes() const;
    QString blockedTypes() const;

    int row() const;

    // filtering
    bool hasDomainMatch(const QString &string);
    bool hasRuleMatch(const QString &string);
    bool shouldBlock(const QWebEngineUrlRequestInfo &info);

    bool isValid();

private:
    bool testFlag(ResourceType flag);
    QString flags(Resources f) const;

    Filter *m_parentItem;
    QList<Filter*> m_children;

    RegExp m_domainUrl;
    RegExp m_requestUrl;

    ResourceRules m_rules;

    bool m_valid = false;
    bool m_shouldBlock;
};

#endif // FILTERNODE_H