Implement Import/Export RSS rules in JSON format

src/base/rss/rss_autodownloader.cpp

@@ -38,6 +38,7 @@
 #include <QThread>
 #include <QTimer>
 #include <QVariant>
+#include <QVector>
 
 #include "../bittorrent/magneturi.h"
 #include "../bittorrent/session.h"
@@ -64,6 +65,32 @@ const QString RulesFileName(QStringLiteral("download_rules.json"));
 
 const QString SettingsKey_ProcessingEnabled(QStringLiteral("RSS/AutoDownloader/EnableProcessing"));
 
+namespace
+{
+    QVector<RSS::AutoDownloadRule> rulesFromJSON(const QByteArray &jsonData)
+    {
+        QJsonParseError jsonError;
+        QJsonDocument jsonDoc = QJsonDocument::fromJson(jsonData, &jsonError);
+        if (jsonError.error != QJsonParseError::NoError)
+            throw RSS::ParsingError(jsonError.errorString());
+
+        if (!jsonDoc.isObject())
+            throw RSS::ParsingError(RSS::AutoDownloader::tr("Invalid data format."));
+
+        const QJsonObject jsonObj {jsonDoc.object()};
+        QVector<RSS::AutoDownloadRule> rules;
+        for (auto it = jsonObj.begin(); it != jsonObj.end(); ++it) {
+            const QJsonValue jsonVal {it.value()};
+            if (!jsonVal.isObject())
+                throw RSS::ParsingError(RSS::AutoDownloader::tr("Invalid data format."));
+
+            rules.append(RSS::AutoDownloadRule::fromJsonObject(jsonVal.toObject(), it.key()));
+        }
+
+        return rules;
+    }
+}
+
 using namespace RSS;
 
 QPointer<AutoDownloader> AutoDownloader::m_instance = nullptr;
@@ -85,8 +112,8 @@ AutoDownloader::AutoDownloader()
     connect(m_ioThread, &QThread::finished, m_fileStorage, &AsyncFileStorage::deleteLater);
     connect(m_fileStorage, &AsyncFileStorage::failed, [](const QString &fileName, const QString &errorString)
     {
-        Logger::instance()->addMessage(QString("Couldn't save RSS AutoDownloader data in %1. Error: %2")
-                                       .arg(fileName).arg(errorString), Log::WARNING);
+        LogMsg(tr("Couldn't save RSS AutoDownloader data in %1. Error: %2")
+               .arg(fileName).arg(errorString), Log::CRITICAL);
     });
 
     m_ioThread->start();
@@ -175,6 +202,43 @@ void AutoDownloader::removeRule(const QString &ruleName)
     }
 }
 
+QByteArray AutoDownloader::exportRules(AutoDownloader::RulesFileFormat format) const
+{
+    switch (format) {
+    case RulesFileFormat::Legacy:
+        return exportRulesToLegacyFormat();
+    default:
+        return exportRulesToJSONFormat();
+    }
+}
+
+void AutoDownloader::importRules(const QByteArray &data, AutoDownloader::RulesFileFormat format)
+{
+    switch (format) {
+    case RulesFileFormat::Legacy:
+        importRulesFromLegacyFormat(data);
+        break;
+    default:
+        importRulesFromJSONFormat(data);
+    }
+}
+
+QByteArray AutoDownloader::exportRulesToJSONFormat() const
+{
+    QJsonObject jsonObj;
+    for (const auto &rule : rules())
+        jsonObj.insert(rule.name(), rule.toJsonObject());
+
+    return QJsonDocument(jsonObj).toJson();
+}
+
+void AutoDownloader::importRulesFromJSONFormat(const QByteArray &data)
+{
+    const auto rules = rulesFromJSON(data);
+    for (const auto &rule : rules)
+        insertRule(rule);
+}
+
 QByteArray AutoDownloader::exportRulesToLegacyFormat() const
 {
     QVariantHash dict;
@@ -189,19 +253,17 @@ QByteArray AutoDownloader::exportRulesToLegacyFormat() const
     return data;
 }
 
-bool AutoDownloader::importRulesFromLegacyFormat(const QByteArray &data)
+void AutoDownloader::importRulesFromLegacyFormat(const QByteArray &data)
 {
     QDataStream in(data);
     in.setVersion(QDataStream::Qt_4_5);
     QVariantHash dict;
     in >> dict;
     if (in.status() != QDataStream::Ok)
-        return false;
+        throw ParsingError(tr("Invalid data format"));
 
     for (const QVariant &val : dict)
         insertRule(AutoDownloadRule::fromLegacyDict(val.toHash()));
-
-    return true;
 }
 
 void AutoDownloader::process()
@@ -306,39 +368,20 @@ void AutoDownloader::load()
     else if (rulesFile.open(QFile::ReadOnly))
         loadRules(rulesFile.readAll());
     else
-        Logger::instance()->addMessage(
-                    QString("Couldn't read RSS AutoDownloader rules from %1. Error: %2")
-                    .arg(rulesFile.fileName()).arg(rulesFile.errorString()), Log::WARNING);
+        LogMsg(tr("Couldn't read RSS AutoDownloader rules from %1. Error: %2")
+               .arg(rulesFile.fileName()).arg(rulesFile.errorString()), Log::CRITICAL);
 }
 
 void AutoDownloader::loadRules(const QByteArray &data)
 {
-    QJsonParseError jsonError;
-    QJsonDocument jsonDoc = QJsonDocument::fromJson(data, &jsonError);
-    if (jsonError.error != QJsonParseError::NoError) {
-        Logger::instance()->addMessage(
-                    QString("Couldn't parse RSS AutoDownloader rules. Error: %1")
-                    .arg(jsonError.errorString()), Log::WARNING);
-        return;
-    }
-
-    if (!jsonDoc.isObject()) {
-        Logger::instance()->addMessage(
-                    QString("Couldn't load RSS AutoDownloader rules. Invalid data format."), Log::WARNING);
-        return;
+    try {
+        const auto rules = rulesFromJSON(data);
+        for (const auto &rule : rules)
+            setRule_impl(rule);
     }
-
-    QJsonObject jsonObj = jsonDoc.object();
-    foreach (const QString &key, jsonObj.keys()) {
-        const QJsonValue jsonVal = jsonObj.value(key);
-        if (!jsonVal.isObject()) {
-            Logger::instance()->addMessage(
-                        QString("Couldn't load RSS AutoDownloader rule '%1'. Invalid data format.")
-                        .arg(key), Log::WARNING);
-            continue;
-        }
-
-        setRule_impl(AutoDownloadRule::fromJsonObject(jsonVal.toObject(), key));
+    catch (const ParsingError &error) {
+        LogMsg(tr("Couldn't load RSS AutoDownloader rules. Reason: %1")
+               .arg(error.message()), Log::CRITICAL);
     }
 }
 
@@ -415,3 +458,13 @@ void AutoDownloader::timerEvent(QTimerEvent *event)
     Q_UNUSED(event);
     store();
 }
+
+ParsingError::ParsingError(const QString &message)
+    : std::runtime_error(message.toUtf8().data())
+{
+}
+
+QString ParsingError::message() const
+{
+    return what();
+}

src/base/rss/rss_autodownloader.h

@@ -28,6 +28,8 @@
 
 #pragma once
 
+#include <stdexcept>
+
 #include <QBasicTimer>
 #include <QHash>
 #include <QList>
@@ -49,6 +51,13 @@ namespace RSS
 
     class AutoDownloadRule;
 
+    class ParsingError : public std::runtime_error
+    {
+    public:
+        explicit ParsingError(const QString &message);
+        QString message() const;
+    };
+
     class AutoDownloader final: public QObject
     {
         Q_OBJECT
@@ -60,6 +69,12 @@ namespace RSS
         ~AutoDownloader() override;
 
     public:
+        enum class RulesFileFormat
+        {
+            Legacy,
+            JSON
+        };
+
         static AutoDownloader *instance();
 
         bool isProcessingEnabled() const;
@@ -73,8 +88,8 @@ namespace RSS
         bool renameRule(const QString &ruleName, const QString &newRuleName);
         void removeRule(const QString &ruleName);
 
-        QByteArray exportRulesToLegacyFormat() const;
-        bool importRulesFromLegacyFormat(const QByteArray &data);
+        QByteArray exportRules(RulesFileFormat format = RulesFileFormat::JSON) const;
+        void importRules(const QByteArray &data, RulesFileFormat format = RulesFileFormat::JSON);
 
     signals:
         void processingStateChanged(bool enabled);
@@ -101,6 +116,10 @@ namespace RSS
         void loadRulesLegacy();
         void store();
         void storeDeferred();
+        QByteArray exportRulesToJSONFormat() const;
+        void importRulesFromJSONFormat(const QByteArray &data);
+        QByteArray exportRulesToLegacyFormat() const;
+        void importRulesFromLegacyFormat(const QByteArray &data);
 
         static QPointer<AutoDownloader> m_instance;
 

src/gui/rss/automatedrssdownloader.cpp

@@ -54,8 +54,13 @@
 #include "autoexpandabledialog.h"
 #include "ui_automatedrssdownloader.h"
 
+const QString EXT_JSON {QStringLiteral(".json")};
+const QString EXT_LEGACY {QStringLiteral(".rssrules")};
+
 AutomatedRssDownloader::AutomatedRssDownloader(QWidget *parent)
     : QDialog(parent)
+    , m_formatFilterJSON(QString("%1 (*%2)").arg(tr("Rules")).arg(EXT_JSON))
+    , m_formatFilterLegacy(QString("%1 (*%2)").arg(tr("Rules (legacy)")).arg(EXT_LEGACY))
     , m_ui(new Ui::AutomatedRssDownloader)
     , m_currentRuleItem(nullptr)
 {
@@ -390,17 +395,30 @@ void AutomatedRssDownloader::on_exportBtn_clicked()
         return;
     }
 
+    QString selectedFilter {m_formatFilterJSON};
     QString path = QFileDialog::getSaveFileName(
-                this, tr("Where would you like to save the list?")
-                , QDir::homePath(), tr("Rules list (legacy)") + QString(" (*.rssrules)"));
+                this, tr("Export RSS rules"), QDir::homePath()
+                , QString("%1;;%2").arg(m_formatFilterJSON).arg(m_formatFilterLegacy), &selectedFilter);
     if (path.isEmpty()) return;
 
-    if (!path.endsWith(".rssrules", Qt::CaseInsensitive))
-        path += ".rssrules";
+    const RSS::AutoDownloader::RulesFileFormat format {
+        (selectedFilter == m_formatFilterJSON)
+                ? RSS::AutoDownloader::RulesFileFormat::JSON
+                : RSS::AutoDownloader::RulesFileFormat::Legacy
+    };
 
-    QFile file(path);
+    if (format == RSS::AutoDownloader::RulesFileFormat::JSON) {
+        if (!path.endsWith(EXT_JSON, Qt::CaseInsensitive))
+            path += EXT_JSON;
+    }
+    else {
+        if (!path.endsWith(EXT_LEGACY, Qt::CaseInsensitive))
+            path += EXT_LEGACY;
+    }
+
+    QFile file {path};
     if (!file.open(QFile::WriteOnly)
-            || (file.write(RSS::AutoDownloader::instance()->exportRulesToLegacyFormat()) == -1)) {
+            || (file.write(RSS::AutoDownloader::instance()->exportRules(format)) == -1)) {
         QMessageBox::critical(
                     this, tr("I/O Error")
                     , tr("Failed to create the destination file. Reason: %1").arg(file.errorString()));
@@ -409,13 +427,14 @@ void AutomatedRssDownloader::on_exportBtn_clicked()
 
 void AutomatedRssDownloader::on_importBtn_clicked()
 {
+    QString selectedFilter {m_formatFilterJSON};
     QString path = QFileDialog::getOpenFileName(
-                this, tr("Please point to the RSS download rules file")
-                , QDir::homePath(), tr("Rules list (legacy)") + QString(" (*.rssrules)"));
+                this, tr("Import RSS rules"), QDir::homePath()
+                , QString("%1;;%2").arg(m_formatFilterJSON).arg(m_formatFilterLegacy), &selectedFilter);
     if (path.isEmpty() || !QFile::exists(path))
         return;
 
-    QFile file(path);
+    QFile file {path};
     if (!file.open(QIODevice::ReadOnly)) {
         QMessageBox::critical(
                     this, tr("I/O Error")
@@ -423,10 +442,19 @@ void AutomatedRssDownloader::on_importBtn_clicked()
         return;
     }
 
-    if (!RSS::AutoDownloader::instance()->importRulesFromLegacyFormat(file.readAll())) {
+    const RSS::AutoDownloader::RulesFileFormat format {
+        (selectedFilter == m_formatFilterJSON)
+                ? RSS::AutoDownloader::RulesFileFormat::JSON
+                : RSS::AutoDownloader::RulesFileFormat::Legacy
+    };
+
+    try {
+        RSS::AutoDownloader::instance()->importRules(file.readAll(),format);
+    }
+    catch (const RSS::ParsingError &error) {
         QMessageBox::critical(
                     this, tr("Import Error")
-                    , tr("Failed to import the selected rules file."));
+                    , tr("Failed to import the selected rules file. Reason: %1").arg(error.message()));
     }
 }
 

src/gui/rss/automatedrssdownloader.h

@@ -96,6 +96,9 @@ private:
     void updateFeedList();
     void addFeedArticlesToTree(RSS::Feed *feed, const QStringList &articles);
 
+    const QString m_formatFilterJSON;
+    const QString m_formatFilterLegacy;
+
     Ui::AutomatedRssDownloader *m_ui;
     QListWidgetItem *m_currentRuleItem;
     QShortcut *m_editHotkey;