Filter code refactoring

12 files changed, 1188 insertions, 0 deletions

diff --git a/src/filter/blockermanager.cpp b/src/filter/blockermanager.cpp
new file mode 100644
index 0000000..90d99a9
--- /dev/null
+++ b/src/filter/blockermanager.cpp
@@ -0,0 +1,53 @@
+/*******************************************************************************
+ **
+ ** 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/>.
+ **
+ ******************************************************************************/
+
+#include "blockermanager.h"
+#include "ui_subscriptiondialog.h"
+
+#include "browser.h"
+#include <QLabel>
+#include <QListWidget>
+
+#include "filtercollection.h"
+
+BlockerManager::BlockerManager(QWidget *parent) :
+    QDialog(parent),
+    ui(new Ui::UrlInterceptorDialog)
+{
+    ui->setupUi(this);
+
+    const QStringList subscriptions = sSettings->value("blocker.subscriptions").toStringList();
+    QStringList::const_iterator i;
+    for(i = subscriptions.constBegin(); i != subscriptions.constEnd(); ++i) {
+        FilterCollection *sub = new FilterCollection(QString(*i), this);
+        m_subscriptions.append(sub);
+        ui->tabWidget->addTab(sub, sub->name());
+    }
+}
+
+BlockerManager::~BlockerManager()
+{
+    delete ui;
+}
+
+QVector<FilterCollection *> BlockerManager::subscriptions() const
+{
+    return m_subscriptions;
+}
diff --git a/src/filter/blockermanager.h b/src/filter/blockermanager.h
new file mode 100644
index 0000000..cfa2110
--- /dev/null
+++ b/src/filter/blockermanager.h
@@ -0,0 +1,46 @@
+/*******************************************************************************
+ **
+ ** 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 URLINTERCEPTORDIALOG_H
+#define URLINTERCEPTORDIALOG_H
+
+#include <QDialog>
+
+namespace Ui {
+class UrlInterceptorDialog;
+}
+
+class FilterCollection;
+class BlockerManager : public QDialog
+{
+    Q_OBJECT
+
+public:
+    explicit BlockerManager(QWidget *parent = 0);
+    ~BlockerManager();
+
+    QVector<FilterCollection* > subscriptions() const;
+
+private:
+    Ui::UrlInterceptorDialog *ui;
+    QVector<FilterCollection *> m_subscriptions;
+};
+
+#endif // URLINTERCEPTORDIALOG_H
diff --git a/src/filter/filter.cpp b/src/filter/filter.cpp
new file mode 100644
index 0000000..e0d01a9
--- /dev/null
+++ b/src/filter/filter.cpp
@@ -0,0 +1,237 @@
+/*******************************************************************************
+ **
+ ** 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/>.
+ **
+ ******************************************************************************/
+
+#include "filter.h"
+
+Filter::Filter(const QString &domain, const QString &request, ResourceRules rules, bool shouldBlock, Filter *parentItem)
+{
+    m_parentItem = parentItem;
+
+    m_domainUrl.setPattern(domain);
+    m_requestUrl.setPattern(request);
+    m_rules = rules;
+    m_shouldBlock = shouldBlock;
+
+    m_valid = false;
+}
+
+Filter::~Filter()
+{
+    qDeleteAll(m_children);
+}
+
+void Filter::enable()
+{
+    m_valid = true;
+}
+
+Filter *Filter::parentItem()
+{
+    return m_parentItem;
+}
+
+void Filter::appendChild(Filter *child)
+{
+    m_children.append(child);
+}
+
+Filter *Filter::child(int row)
+{
+    return m_children.value(row);
+}
+
+int Filter::childCount() const
+{
+    return m_children.count();
+}
+
+QString Filter::domain() const
+{
+    return m_domainUrl.pattern();
+}
+
+QString Filter::request() const
+{
+    return m_requestUrl.pattern();
+}
+
+bool Filter::isBlocking()
+{
+    return m_shouldBlock;
+}
+
+QString Filter::allowedTypes() const
+{
+    return flags(m_rules.allowed);
+}
+
+QString Filter::blockedTypes() const
+{
+    return flags(m_rules.blocked);
+}
+
+int Filter::row() const
+{
+    if(m_parentItem) {
+        return m_parentItem->m_children.indexOf(const_cast<Filter*>(this));
+    }
+
+    return 0;
+}
+
+bool Filter::hasMatch(const QWebEngineUrlRequestInfo &info)
+{
+    if(m_domainUrl.hasMatch(info.firstPartyUrl().toString()) && m_requestUrl.hasMatch(info.requestUrl().toString())) {
+        return true;
+    } else {
+        return false;
+    }
+}
+
+bool Filter::shouldBlock(const QWebEngineUrlRequestInfo &info)
+{
+    if(!m_valid) {
+        return false;
+    }
+
+    // Check options
+    switch (info.resourceType()) {
+    case QWebEngineUrlRequestInfo::ResourceTypeMainFrame:
+        return testFlag(MainFrame);
+    case QWebEngineUrlRequestInfo::ResourceTypeSubFrame:
+        return testFlag(SubFrame);
+    case QWebEngineUrlRequestInfo::ResourceTypeStylesheet:
+        return testFlag(Stylesheet);
+    case QWebEngineUrlRequestInfo::ResourceTypeScript:
+        return testFlag(Script);
+    case QWebEngineUrlRequestInfo::ResourceTypeImage:
+        return testFlag(Image);
+    case QWebEngineUrlRequestInfo::ResourceTypeFontResource:
+        return testFlag(Font);
+    case QWebEngineUrlRequestInfo::ResourceTypeSubResource:
+        return testFlag(SubResource);
+    case QWebEngineUrlRequestInfo::ResourceTypeObject:
+        return testFlag(Object);
+    case QWebEngineUrlRequestInfo::ResourceTypeMedia:
+        return testFlag(Media);
+    case QWebEngineUrlRequestInfo::ResourceTypeWorker:
+        return testFlag(Worker);
+    case QWebEngineUrlRequestInfo::ResourceTypeSharedWorker:
+        return testFlag(SharedWorker);
+    case QWebEngineUrlRequestInfo::ResourceTypePrefetch:
+        return testFlag(Prefetch);
+    case QWebEngineUrlRequestInfo::ResourceTypeFavicon:
+        return testFlag(Favicon);
+    case QWebEngineUrlRequestInfo::ResourceTypeXhr:
+        return testFlag(Xhr);
+    case QWebEngineUrlRequestInfo::ResourceTypePing:
+        return testFlag(Ping);
+    case QWebEngineUrlRequestInfo::ResourceTypeServiceWorker:
+        return testFlag(ServiceWorker);
+    case QWebEngineUrlRequestInfo::ResourceTypeCspReport:
+        return testFlag(CspReport);
+    case QWebEngineUrlRequestInfo::ResourceTypePluginResource:
+        return testFlag(PluginResource);
+    case QWebEngineUrlRequestInfo::ResourceTypeUnknown:
+        break;
+    }
+
+    return m_shouldBlock;
+
+}
+
+bool Filter::isValid()
+{
+    return m_valid;
+}
+
+bool Filter::testFlag(ResourceType flag)
+{
+    if(m_rules.allowed.testFlag(flag)) {
+        return false;
+    } else if(m_rules.blocked.testFlag(flag)) {
+        return true;
+    } else {
+        return m_shouldBlock;
+    }
+}
+
+QString Filter::flags(Resources f) const
+{
+    QStringList r;
+    if(f.testFlag(MainFrame)) {
+        r << QObject::tr("Main Frame");
+    }
+    if(f.testFlag(SubFrame)) {
+        r << QObject::tr("Sub Frame");
+    }
+    if(f.testFlag(Stylesheet)) {
+        r << QObject::tr("Stylesheet");
+    }
+    if(f.testFlag(Script)) {
+        r << QObject::tr("Script");
+    }
+    if(f.testFlag(Image)) {
+        r << QObject::tr("Image");
+    }
+    if(f.testFlag(Font)) {
+        r << QObject::tr("Font");
+    }
+    if(f.testFlag(SubResource)) {
+        r << QObject::tr("Sub Resource");
+    }
+    if(f.testFlag(Object)) {
+        r << QObject::tr("Object");
+    }
+    if(f.testFlag(Media)) {
+        r << QObject::tr("Media");
+    }
+    if(f.testFlag(Worker)) {
+        r << QObject::tr("Worker");
+    }
+    if(f.testFlag(SharedWorker)) {
+        r << QObject::tr("Shared Worker");
+    }
+    if(f.testFlag(Prefetch)) {
+        r << QObject::tr("Prefetch");
+    }
+    if(f.testFlag(Favicon)) {
+        r << QObject::tr("Favicon");
+    }
+    if(f.testFlag(Xhr)) {
+        r << QObject::tr("Xhr");
+    }
+    if(f.testFlag(Ping)) {
+        r << QObject::tr("Ping");
+    }
+    if(f.testFlag(ServiceWorker)) {
+        r << QObject::tr("Service Worker");
+    }
+    if(f.testFlag(CspReport)) {
+        r << QObject::tr("Csp Report");
+    }
+    if(f.testFlag(PluginResource)) {
+        r << QObject::tr("Plugin Resource");
+    }
+    if(f.testFlag(Unknown)) {
+        r << QObject::tr("Unknown");
+    }
+    return r.join(',');
+}
diff --git a/src/filter/filter.h b/src/filter/filter.h
new file mode 100644
index 0000000..37604fe
--- /dev/null
+++ b/src/filter/filter.h
@@ -0,0 +1,106 @@
+/*******************************************************************************
+ **
+ ** 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 hasMatch(const QWebEngineUrlRequestInfo &info);
+    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
diff --git a/src/filter/filtercollection.cpp b/src/filter/filtercollection.cpp
new file mode 100644
index 0000000..7b07606
--- /dev/null
+++ b/src/filter/filtercollection.cpp
@@ -0,0 +1,171 @@
+/*******************************************************************************
+ **
+ ** 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/>.
+ **
+ ******************************************************************************/
+
+#include "filtercollection.h"
+#include "ui_subscriptionform.h"
+
+#include "browser.h"
+#include <QNetworkRequest>
+#include <QNetworkReply>
+
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QJsonArray>
+
+#include <QListWidget>
+#include <QLabel>
+
+#include <QTreeView>
+#include "filtertree.h"
+#include "filter.h"
+
+FilterCollection::FilterCollection(const QString path, QWidget *parent) :
+    QWidget(parent),
+    ui(new Ui::SubscriptionForm)
+{
+    ui->setupUi(this);
+
+    ui->homepage->setText(path);
+
+    qDebug("Adding subscription [%s]", qUtf8Printable(path));
+
+    m_filters = new FilterTree(this);
+    ui->treeView->setModel(m_filters);
+
+    QFile filterFile(path);
+    if(!filterFile.open(QIODevice::ReadOnly)) {
+        qWarning("Could not open filter!");
+        return;
+    }
+
+    QJsonDocument filters(QJsonDocument::fromJson(filterFile.readAll()));
+    qDebug("Added %i rules", load(filters.object()));
+}
+
+FilterCollection::~FilterCollection()
+{
+    delete ui;
+}
+
+QString FilterCollection::name() const
+{
+    return ui->title->text();
+}
+
+/**
+ * Check if a URL request should be blocked or not
+ * @param info
+ * @return true if it should be blocked; false otherwise
+ */
+FilterCollection::MatchResult FilterCollection::match(QWebEngineUrlRequestInfo &info)
+{
+    MatchResult result;
+
+    for(Filter *rule : m_filters->filters(info.firstPartyUrl().toString())) {
+        if(rule->isValid()) {
+            result.match = rule->hasMatch(info);
+            if(result.match) {
+                result.block = rule->shouldBlock(info);
+            } else {
+                result.block = false;
+            }
+            result.pattern = rule->domain() + " | " + rule->request();
+            return result;
+        }
+    }
+
+    // request matches neither whitelist nor blacklist
+    result.match = false;
+    result.block = false;
+    return result;
+}
+
+/**
+ * Load rules from JSON object
+ * @param json
+ */
+int FilterCollection::load(const QJsonObject &json)
+{
+    int number = 0;
+
+    ui->title->setText(json["name"].toString());
+    ui->homepage->setText(json["url"].toString());
+
+    for(QJsonValue v : json["rules"].toArray()) {
+        ++number;
+
+        QJsonObject obj = v.toObject();
+
+        Filter::ResourceRules r;
+        r.allowed = parseJsonRules(obj["allowTypes"]);
+        r.blocked = parseJsonRules(obj["blockTypes"]);
+
+        m_filters->addFilter(obj["firstPartyUrl"].toString(), obj["requestUrl"].toString(), r, obj["shouldBlock"].toBool());
+    }
+
+    return number;
+}
+
+Filter::Resources FilterCollection::parseJsonRules(const QJsonValue &obj)
+{
+    Filter::Resources res;
+    for(QJsonValue v : obj.toArray()) {
+        QString t = v.toString();
+        if(t == "MainFrame") {
+            res.setFlag(Filter::ResourceType::MainFrame);
+        } else if(t == "SubFrame") {
+            res.setFlag(Filter::ResourceType::SubFrame);
+        } else if(t == "Stylesheet") {
+            res.setFlag(Filter::ResourceType::Stylesheet);
+        } else if(t == "Script") {
+            res.setFlag(Filter::ResourceType::Script);
+        } else if(t == "Image") {
+            res.setFlag(Filter::ResourceType::Image);
+        } else if(t == "FontResource") {
+            res.setFlag(Filter::ResourceType::Font);
+        } else if(t == "SubResource") {
+            res.setFlag(Filter::ResourceType::SubResource);
+        } else if(t == "Object") {
+            res.setFlag(Filter::ResourceType::Object);
+        } else if(t == "Media") {
+            res.setFlag(Filter::ResourceType::Media);
+        } else if(t == "Worker") {
+            res.setFlag(Filter::ResourceType::Worker);
+        } else if(t == "SharedWorker") {
+            res.setFlag(Filter::ResourceType::SharedWorker);
+        } else if(t == "Prefetch") {
+            res.setFlag(Filter::ResourceType::Prefetch);
+        } else if(t == "Favicon") {
+            res.setFlag(Filter::ResourceType::Favicon);
+        } else if(t == "Xhr") {
+            res.setFlag(Filter::ResourceType::Xhr);
+        } else if(t == "Ping") {
+            res.setFlag(Filter::ResourceType::Ping);
+        } else if(t == "ServiceWorker") {
+            res.setFlag(Filter::ResourceType::ServiceWorker);
+        } else if(t == "CspWorker") {
+            res.setFlag(Filter::ResourceType::CspReport);
+        } else if(t == "PluginResource") {
+            res.setFlag(Filter::ResourceType::PluginResource);
+        }
+    }
+
+    return res;
+}
diff --git a/src/filter/filtercollection.h b/src/filter/filtercollection.h
new file mode 100644
index 0000000..c39fb0a
--- /dev/null
+++ b/src/filter/filtercollection.h
@@ -0,0 +1,61 @@
+/*******************************************************************************
+ **
+ ** 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 SUBSCRIPTIONFORM_H
+#define SUBSCRIPTIONFORM_H
+
+#include <QWidget>
+#include <QFile>
+#include "filtertree.h"
+
+namespace Ui {
+class SubscriptionForm;
+}
+
+class FilterCollection : public QWidget
+{
+    Q_OBJECT
+
+public:
+    struct MatchResult {
+        bool match;
+        bool block;
+        QString pattern;
+    };
+
+    explicit FilterCollection(const QString path, QWidget *parent = 0);
+    ~FilterCollection();
+
+    QString name() const;
+    MatchResult match(QWebEngineUrlRequestInfo &info);
+
+private slots:
+    int load(const QJsonObject &json);
+
+private:
+    Filter::Resources parseJsonRules(const QJsonValue &obj);
+
+    Ui::SubscriptionForm *ui;
+
+    FilterTree *m_filters;
+
+};
+
+#endif // SUBSCRIPTIONFORM_H
diff --git a/src/filter/filtertree.cpp b/src/filter/filtertree.cpp
new file mode 100644
index 0000000..b71c2a3
--- /dev/null
+++ b/src/filter/filtertree.cpp
@@ -0,0 +1,161 @@
+/*******************************************************************************
+ **
+ ** 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/>.
+ **
+ ******************************************************************************/
+
+#include "filtertree.h"
+
+FilterTree::FilterTree(QObject *parent) :
+    QAbstractItemModel(parent)
+{
+    rootItem = new Filter("", "", Filter::ResourceRules(), false);
+}
+
+FilterTree::~FilterTree()
+{
+    delete rootItem;
+}
+
+QModelIndex FilterTree::index(int row, int column, const QModelIndex &parent) const
+{
+    if(!hasIndex(row, column, parent)) {
+        return QModelIndex();
+    }
+
+    Filter *parentItem;
+    if(!parent.isValid()) {
+        parentItem = rootItem;
+    } else {
+        parentItem = static_cast<Filter*>(parent.internalPointer());
+    }
+
+    Filter *childItem = parentItem->child(row);
+    if(childItem) {
+        return createIndex(row, column, childItem);
+    } else {
+        return QModelIndex();
+    }
+}
+
+QModelIndex FilterTree::parent(const QModelIndex &index) const
+{
+    if(!index.isValid()) {
+        return QModelIndex();
+    }
+
+    Filter *childItem = static_cast<Filter*>(index.internalPointer());
+    Filter *parentItem = childItem->parentItem();
+
+    if(parentItem == rootItem) {
+        return QModelIndex();
+    }
+
+    return createIndex(parentItem->row(), 0, parentItem);
+}
+
+int FilterTree::rowCount(const QModelIndex &parent) const
+{
+    Filter *parentItem;
+    if(parent.column() > 0) {
+        return 0;
+    }
+
+    if(!parent.isValid()) {
+        parentItem = rootItem;
+    } else {
+        parentItem = static_cast<Filter*>(parent.internalPointer());
+    }
+
+    return parentItem->childCount();
+}
+
+int FilterTree::columnCount(const QModelIndex &parent) const
+{
+    Q_UNUSED(parent)
+    return 5;
+}
+
+QVariant FilterTree::data(const QModelIndex &index, int role) const
+{
+    if(!index.isValid()) {
+        return QVariant();
+    }
+
+    if(role != Qt::DisplayRole) {
+        return QVariant();
+    }
+
+    Filter *n = static_cast<Filter*>(index.internalPointer());
+    switch (index.column()) {
+    case 0: // domain
+        return QVariant(n->domain());
+    case 1: // request
+        return QVariant(n->request());
+    case 2: // should block
+        return QVariant(n->isBlocking() ? "true" : "false");
+    case 3: // allowed types
+        return QVariant(n->allowedTypes());
+    case 4: // blocked types
+        return QVariant(n->blockedTypes());
+    default:
+        return QVariant();
+    }
+}
+
+QVariant FilterTree::headerData(int section, Qt::Orientation orientation, int role) const
+{
+    if(orientation != Qt::Horizontal) {
+        return QVariant();
+    }
+
+    if(role != Qt::DisplayRole) {
+        return QVariant();
+    }
+
+    switch (section) {
+    case 0:
+        return QVariant(tr("Domain"));
+    case 1:
+        return QVariant(tr("Request"));
+    case 2:
+        return QVariant(tr("Should Block"));
+    case 3:
+        return QVariant(tr("Allowed Types"));
+    case 4:
+        return QVariant(tr("Blocked Types"));
+    default:
+        return QVariant();
+    }
+}
+
+Filter *FilterTree::addFilter(const QString &domain, const QString &request, Filter::ResourceRules rules, bool shouldBlock)
+{
+    Filter *node = new Filter(domain, request, rules, shouldBlock, rootItem);
+    node->enable();
+    rootItem->appendChild(node);
+    return node;
+}
+
+QVector<Filter*> FilterTree::filters(const QString &domain)
+{
+    QVector<Filter*> nodes;
+    for(int i = 0; i < rootItem->childCount(); ++i) {
+        nodes.append(rootItem->child(i));
+    }
+    return nodes;
+}
diff --git a/src/filter/filtertree.h b/src/filter/filtertree.h
new file mode 100644
index 0000000..161b199
--- /dev/null
+++ b/src/filter/filtertree.h
@@ -0,0 +1,51 @@
+/*******************************************************************************
+ **
+ ** 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 FILTERTREE_H
+#define FILTERTREE_H
+
+#include <QAbstractItemModel>
+#include <QModelIndex>
+#include <QVariant>
+#include "filter.h"
+
+class FilterTree : public QAbstractItemModel
+{
+    Q_OBJECT
+
+public:
+    explicit FilterTree(QObject *parent = 0);
+    ~FilterTree();
+
+    QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const override;
+    QModelIndex parent(const QModelIndex &index) const override;
+    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+    int columnCount(const QModelIndex &parent = QModelIndex()) const override;
+    QVariant data(const QModelIndex &index, int role) const override;
+    QVariant headerData(int section, Qt::Orientation orientation, int role) const override;
+
+    Filter *addFilter(const QString &domain, const QString &request, Filter::ResourceRules rules, bool shouldBlock);
+    QVector<Filter*> filters(const QString &domain = "");
+
+private:
+    Filter *rootItem;
+};
+
+#endif // FILTERTREE_H
diff --git a/src/filter/regexp.cpp b/src/filter/regexp.cpp
new file mode 100644
index 0000000..1f3c449
--- /dev/null
+++ b/src/filter/regexp.cpp
@@ -0,0 +1,72 @@
+/*******************************************************************************
+ **
+ ** 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/>.
+ **
+ ******************************************************************************/
+
+#include "regexp.h"
+
+RegExp::RegExp(const QString &pattern, PatternOptions options) :
+    QRegularExpression()
+{
+    setPattern(pattern);
+    setPatternOptions(options);
+}
+
+bool RegExp::hasMatch(const QString &subject, int offset, MatchType matchType, MatchOptions matchOptions) const
+{
+    // Empty matches all
+    if(pattern().isEmpty()) {
+        return true;
+    }
+
+    return QRegularExpression::match(subject, offset, matchType, matchOptions).hasMatch();
+}
+
+void RegExp::setWildcardPattern(const QString &pattern)
+{
+    QString parsed;
+
+    for(int i=0; i<pattern.length(); i++) {
+        const QChar c = pattern.at(i);
+        switch (c.toLatin1()) {
+        case '*':
+            // remove * at the start and end
+            if(i != 0 && i != pattern.length()-1) {
+                parsed.append(".*");
+            }
+            break;
+        case '^':
+            parsed.append("(?:[^\\w\\d\\_\\-\\.\\%]|$)");
+            break;
+        case '|':
+            if(i == 0) {
+                // beginning of string
+                parsed.append('^');
+            } else {
+                // end of string
+                parsed.append('$');
+            }
+            break;
+        default:
+            parsed.append(c);
+            break;
+        }
+    }
+
+    setPattern(parsed);
+}
diff --git a/src/filter/regexp.h b/src/filter/regexp.h
new file mode 100644
index 0000000..86cedfd
--- /dev/null
+++ b/src/filter/regexp.h
@@ -0,0 +1,38 @@
+/*******************************************************************************
+ **
+ ** 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 REGEXP_H
+#define REGEXP_H
+
+#include <QRegularExpression>
+
+/*!
+ * Regular Expression class for AdBlockPlus filters
+ */
+class RegExp : public QRegularExpression
+{
+public:
+    explicit RegExp(const QString &pattern = "", PatternOptions options = NoPatternOption);
+
+    bool hasMatch(const QString &subject, int offset=0, MatchType matchType=NormalMatch, MatchOptions matchOptions=NoMatchOption) const;
+    void setWildcardPattern(const QString &pattern);
+};
+
+#endif // REGEXP_H
diff --git a/src/filter/subscriptiondialog.ui b/src/filter/subscriptiondialog.ui
new file mode 100644
index 0000000..7a63cc9
--- /dev/null
+++ b/src/filter/subscriptiondialog.ui
@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>UrlInterceptorDialog</class>
+ <widget class="QDialog" name="UrlInterceptorDialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>640</width>
+    <height>480</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Blocker</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QTabWidget" name="tabWidget"/>
+   </item>
+   <item>
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Close</set>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>UrlInterceptorDialog</receiver>
+   <slot>accept()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>248</x>
+     <y>254</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>157</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>rejected()</signal>
+   <receiver>UrlInterceptorDialog</receiver>
+   <slot>reject()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>316</x>
+     <y>260</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>286</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>
diff --git a/src/filter/subscriptionform.ui b/src/filter/subscriptionform.ui
new file mode 100644
index 0000000..0a20582
--- /dev/null
+++ b/src/filter/subscriptionform.ui
@@ -0,0 +1,125 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>SubscriptionForm</class>
+ <widget class="QWidget" name="SubscriptionForm">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>640</width>
+    <height>480</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QGroupBox" name="groupBox">
+     <property name="title">
+      <string>Subscription</string>
+     </property>
+     <layout class="QHBoxLayout" name="horizontalLayout">
+      <item>
+       <layout class="QFormLayout" name="leftFormLayout">
+        <item row="0" column="0">
+         <widget class="QLabel" name="title_label">
+          <property name="text">
+           <string>Title</string>
+          </property>
+         </widget>
+        </item>
+        <item row="0" column="1">
+         <widget class="QLabel" name="title">
+          <property name="text">
+           <string>TextLabel</string>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="0">
+         <widget class="QLabel" name="homepage_label">
+          <property name="text">
+           <string>Homepage</string>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="1">
+         <widget class="QLabel" name="homepage">
+          <property name="text">
+           <string>TextLabel</string>
+          </property>
+         </widget>
+        </item>
+        <item row="2" column="0">
+         <widget class="QLabel" name="license_label">
+          <property name="text">
+           <string>License</string>
+          </property>
+         </widget>
+        </item>
+        <item row="2" column="1">
+         <widget class="QLabel" name="license">
+          <property name="text">
+           <string>TextLabel</string>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
+      <item>
+       <layout class="QFormLayout" name="rightFormLayout">
+        <item row="0" column="0">
+         <widget class="QLabel" name="version_label">
+          <property name="text">
+           <string>Version</string>
+          </property>
+         </widget>
+        </item>
+        <item row="0" column="1">
+         <widget class="QLabel" name="version">
+          <property name="text">
+           <string>TextLabel</string>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="0">
+         <widget class="QLabel" name="lastModified_label">
+          <property name="text">
+           <string>Last Modified</string>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="1">
+         <widget class="QLabel" name="lastModified">
+          <property name="text">
+           <string>TextLabel</string>
+          </property>
+         </widget>
+        </item>
+        <item row="2" column="0">
+         <widget class="QLabel" name="expires_label">
+          <property name="text">
+           <string>Expires</string>
+          </property>
+         </widget>
+        </item>
+        <item row="2" column="1">
+         <widget class="QLabel" name="expires">
+          <property name="text">
+           <string>TextLabel</string>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QTreeView" name="treeView"/>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>