Simple streamlink support (#97)

* Simple streamlink support

Relies on settings entry & loads best available quality by default.

src/widgets/chatwidget.cpp

@@ -11,6 +11,8 @@
 #include <QPainter>
 #include <QShortcut>
 #include <QVBoxLayout>
+#include <QFileInfo>
+#include <QProcess>
 #include <boost/signals2.hpp>
 
 #include <functional>
@@ -270,5 +272,20 @@ void ChatWidget::doOpenPopupPlayer()
              << QString::fromStdString(this->channelName.getValue()) << "/popout";
 }
 
+void ChatWidget::doOpenStreamlink()
+{
+    SettingsManager &settings = SettingsManager::getInstance();
+    QString path = QString::fromStdString(settings.streamlinkPath.getValue());
+    QFileInfo fileinfo = QFileInfo(path);
+    // TODO(Confuseh): Add default checks for streamlink/livestreamer
+    // TODO(Confuseh): Add quality switcher
+    if (fileinfo.exists() && fileinfo.isExecutable()) {
+        // works on leenux, idk whether it would work on whindows or mehOS
+        QProcess::startDetached(path,
+                                QStringList({"twitch.tv/" + QString::fromStdString(this->channelName.getValue()),
+                                             "best"}));
+    }
+}
+
 }  // namespace widgets
 }  // namespace chatterino