Allow to load TorrentInfo from data buffer

src/base/bittorrent/torrentinfo.cpp

@@ -60,23 +60,32 @@ TorrentInfo &TorrentInfo::operator=(const TorrentInfo &other)
     return *this;
 }
 
-TorrentInfo TorrentInfo::loadFromFile(const QString &path, QString &error)
+TorrentInfo TorrentInfo::load(const QByteArray &data, QString *error) noexcept
 {
-    error.clear();
     libt::error_code ec;
-    TorrentInfo info(NativePtr(new libt::torrent_info(Utils::Fs::toNativePath(path).toStdString(), ec)));
-    if (ec) {
-        error = QString::fromUtf8(ec.message().c_str());
-        qDebug("Cannot load .torrent file: %s", qUtf8Printable(error));
+    TorrentInfo info(NativePtr(new libt::torrent_info(data.constData(), data.size(), ec)));
+    if (error) {
+        if (ec)
+            *error = QString::fromStdString(ec.message());
+        else
+            error->clear();
     }
 
     return info;
 }
 
-TorrentInfo TorrentInfo::loadFromFile(const QString &path)
+TorrentInfo TorrentInfo::loadFromFile(const QString &path, QString *error) noexcept
 {
-    QString error;
-    return loadFromFile(path, error);
+    libt::error_code ec;
+    TorrentInfo info(NativePtr(new libt::torrent_info(Utils::Fs::toNativePath(path).toStdString(), ec)));
+    if (error) {
+        if (ec)
+            *error = QString::fromStdString(ec.message());
+        else
+            error->clear();
+    }
+
+    return info;
 }
 
 bool TorrentInfo::isValid() const

src/base/bittorrent/torrentinfo.h

@@ -63,8 +63,8 @@ namespace BitTorrent
         explicit TorrentInfo(NativeConstPtr nativeInfo = NativeConstPtr());
         TorrentInfo(const TorrentInfo &other);
 
-        static TorrentInfo loadFromFile(const QString &path, QString &error);
-        static TorrentInfo loadFromFile(const QString &path);
+        static TorrentInfo load(const QByteArray &data, QString *error = nullptr) noexcept;
+        static TorrentInfo loadFromFile(const QString &path, QString *error = nullptr) noexcept;
 
         TorrentInfo &operator=(const TorrentInfo &other);
 

src/gui/addnewtorrentdialog.cpp

@@ -286,7 +286,7 @@ bool AddNewTorrentDialog::loadTorrent(const QString &torrentPath)
 
     m_hasMetadata = true;
     QString error;
-    m_torrentInfo = BitTorrent::TorrentInfo::loadFromFile(m_filePath, error);
+    m_torrentInfo = BitTorrent::TorrentInfo::loadFromFile(m_filePath, &error);
     if (!m_torrentInfo.isValid()) {
         MessageBoxRaised::critical(this, tr("Invalid torrent"), tr("Failed to load the torrent: %1.\nError: %2", "Don't remove the '\n' characters. They insert a newline.").arg(Utils::Fs::toNativePath(m_filePath)).arg(error));
         return false;