Implement Import/Export RSS rules in legacy format

src/base/rss/rss_autodownloader.cpp

@@ -28,6 +28,7 @@
 
 #include "rss_autodownloader.h"
 
+#include <QDataStream>
 #include <QDebug>
 #include <QJsonArray>
 #include <QJsonDocument>
@@ -174,6 +175,35 @@ void AutoDownloader::removeRule(const QString &ruleName)
     }
 }
 
+QByteArray AutoDownloader::exportRulesToLegacyFormat() const
+{
+    QVariantHash dict;
+    for (const auto &rule : rules())
+        dict[rule.name()] = rule.toLegacyDict();
+
+    QByteArray data;
+    QDataStream out(&data, QIODevice::WriteOnly);
+    out.setVersion(QDataStream::Qt_4_5);
+    out << dict;
+
+    return data;
+}
+
+bool 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;
+
+    for (const QVariant &val : dict)
+        insertRule(AutoDownloadRule::fromLegacyDict(val.toHash()));
+
+    return true;
+}
+
 void AutoDownloader::process()
 {
     if (m_processingQueue.isEmpty()) return; // processing was disabled
@@ -317,7 +347,7 @@ void AutoDownloader::loadRulesLegacy()
     SettingsPtr settings = Profile::instance().applicationSettings(QStringLiteral("qBittorrent-rss"));
     QVariantHash rules = settings->value(QStringLiteral("download_rules")).toHash();
     foreach (const QVariant &ruleVar, rules) {
-        auto rule = AutoDownloadRule::fromVariantHash(ruleVar.toHash());
+        auto rule = AutoDownloadRule::fromLegacyDict(ruleVar.toHash());
         if (!rule.name().isEmpty())
             insertRule(rule);
     }

src/base/rss/rss_autodownloader.h

@@ -73,6 +73,9 @@ namespace RSS
         bool renameRule(const QString &ruleName, const QString &newRuleName);
         void removeRule(const QString &ruleName);
 
+        QByteArray exportRulesToLegacyFormat() const;
+        bool importRulesFromLegacyFormat(const QByteArray &data);
+
     signals:
         void processingStateChanged(bool enabled);
         void ruleAdded(const QString &ruleName);

src/base/rss/rss_autodownloadrule.cpp

@@ -63,11 +63,29 @@ namespace
     QJsonValue triStateBoolToJsonValue(const TriStateBool &triStateBool)
     {
         switch (static_cast<int>(triStateBool)) {
-        case 0:  return false; break;
-        case 1:  return true; break;
+        case 0:  return false;
+        case 1:  return true;
         default: return QJsonValue();
         }
     }
+
+    TriStateBool addPausedLegacyToTriStateBool(int val)
+    {
+        switch (val) {
+        case 1:  return TriStateBool::True; // always
+        case 2:  return TriStateBool::False; // never
+        default: return TriStateBool::Undefined; // default
+        }
+    }
+
+    int triStateBoolToAddPausedLegacy(const TriStateBool &triStateBool)
+    {
+        switch (static_cast<int>(triStateBool)) {
+        case 0:  return 2; // never
+        case 1:  return 1; // always
+        default: return 0; // default
+        }
+    }
 }
 
 const QString Str_Name(QStringLiteral("name"));
@@ -378,21 +396,37 @@ AutoDownloadRule AutoDownloadRule::fromJsonObject(const QJsonObject &jsonObj, co
     return rule;
 }
 
-AutoDownloadRule AutoDownloadRule::fromVariantHash(const QVariantHash &varHash)
+QVariantHash AutoDownloadRule::toLegacyDict() const
 {
-    AutoDownloadRule rule(varHash.value("name").toString());
+    return {{"name", name()},
+        {"must_contain", mustContain()},
+        {"must_not_contain", mustNotContain()},
+        {"save_path", savePath()},
+        {"affected_feeds", feedURLs()},
+        {"enabled", isEnabled()},
+        {"category_assigned", assignedCategory()},
+        {"use_regex", useRegex()},
+        {"add_paused", triStateBoolToAddPausedLegacy(addPaused())},
+        {"episode_filter", episodeFilter()},
+        {"last_match", lastMatch()},
+        {"ignore_days", ignoreDays()}};
+}
 
-    rule.setUseRegex(varHash.value("use_regex", false).toBool());
-    rule.setMustContain(varHash.value("must_contain").toString());
-    rule.setMustNotContain(varHash.value("must_not_contain").toString());
-    rule.setEpisodeFilter(varHash.value("episode_filter").toString());
-    rule.setFeedURLs(varHash.value("affected_feeds").toStringList());
-    rule.setEnabled(varHash.value("enabled", false).toBool());
-    rule.setSavePath(varHash.value("save_path").toString());
-    rule.setCategory(varHash.value("category_assigned").toString());
-    rule.setAddPaused(TriStateBool(varHash.value("add_paused").toInt() - 1));
-    rule.setLastMatch(varHash.value("last_match").toDateTime());
-    rule.setIgnoreDays(varHash.value("ignore_days").toInt());
+AutoDownloadRule AutoDownloadRule::fromLegacyDict(const QVariantHash &dict)
+{
+    AutoDownloadRule rule(dict.value("name").toString());
+
+    rule.setUseRegex(dict.value("use_regex", false).toBool());
+    rule.setMustContain(dict.value("must_contain").toString());
+    rule.setMustNotContain(dict.value("must_not_contain").toString());
+    rule.setEpisodeFilter(dict.value("episode_filter").toString());
+    rule.setFeedURLs(dict.value("affected_feeds").toStringList());
+    rule.setEnabled(dict.value("enabled", false).toBool());
+    rule.setSavePath(dict.value("save_path").toString());
+    rule.setCategory(dict.value("category_assigned").toString());
+    rule.setAddPaused(addPausedLegacyToTriStateBool(dict.value("add_paused").toInt()));
+    rule.setLastMatch(dict.value("last_match").toDateTime());
+    rule.setIgnoreDays(dict.value("ignore_days").toInt());
 
     return rule;
 }

src/base/rss/rss_autodownloadrule.h

@@ -84,7 +84,9 @@ namespace RSS
 
         QJsonObject toJsonObject() const;
         static AutoDownloadRule fromJsonObject(const QJsonObject &jsonObj, const QString &name = "");
-        static AutoDownloadRule fromVariantHash(const QVariantHash &varHash);
+
+        QVariantHash toLegacyDict() const;
+        static AutoDownloadRule fromLegacyDict(const QVariantHash &dict);
 
     private:
         bool matches(const QString &articleTitle, const QString &expression) const;