Feat: Add MtProxy (Telegram)

client/ui/controllers/networkReachabilityController.cpp

@@ -0,0 +1,46 @@
+#include "networkReachabilityController.h"
+
+#include <QNetworkInformation>
+
+namespace {
+
+    bool reachabilityAllowsRemoteOperations(QNetworkInformation::Reachability r) {
+        using R = QNetworkInformation::Reachability;
+        // Unknown: no backend or not yet determined — do not block UI.
+        return r == R::Online || r == R::Unknown;
+    }
+
+} // namespace
+
+NetworkReachabilityController::NetworkReachabilityController(QObject *parent) : QObject(parent) {
+    attachToNetworkInformation();
+}
+
+bool NetworkReachabilityController::hasInternetAccess() const {
+    return m_hasInternetAccess;
+}
+
+void NetworkReachabilityController::attachToNetworkInformation() {
+    if (!QNetworkInformation::loadDefaultBackend()) {
+        return;
+    }
+    QNetworkInformation *ni = QNetworkInformation::instance();
+    if (!ni) {
+        return;
+    }
+    const bool initial = reachabilityAllowsRemoteOperations(ni->reachability());
+    const bool previous = m_hasInternetAccess;
+    m_hasInternetAccess = initial;
+    if (previous != m_hasInternetAccess) {
+        emit hasInternetAccessChanged();
+    }
+    connect(ni, &QNetworkInformation::reachabilityChanged, this,
+            [this](QNetworkInformation::Reachability r) {
+                const bool ok = reachabilityAllowsRemoteOperations(r);
+                if (ok == m_hasInternetAccess) {
+                    return;
+                }
+                m_hasInternetAccess = ok;
+                emit hasInternetAccessChanged();
+            });
+}