Add indicator for lack of internet connectivity

Fix #315

imports/NeoChat/Component/ChatBox/ChatBox.qml

@@ -3,6 +3,7 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 import QtQuick 2.15
+import QtQuick.Controls 2.15 as QQC2
 import Qt.labs.platform 1.1 as Platform
 import org.kde.kirigami 2.15 as Kirigami
 
@@ -48,6 +49,31 @@ Item {
         }
     }
 
+    Kirigami.Separator {
+        id: connectionPaneSeparator
+        visible: connectionPane.visible
+        width: parent.width
+        height: visible ? implicitHeight : 0
+        anchors.bottom: connectionPane.top
+        z: 1
+    }
+
+    QQC2.Pane {
+        id: connectionPane
+        padding: fontMetrics.lineSpacing * 0.25
+        spacing: 0
+        Kirigami.Theme.colorSet: Kirigami.Theme.View
+        background: Rectangle {
+            color: Kirigami.Theme.backgroundColor
+        }
+        visible: !Controller.isOnline
+        width: parent.width
+        QQC2.Label {
+            text: i18n("NeoChat is online. Please check your network connection.")
+        }
+        anchors.bottom: emojiPickerLoaderSeparator.top
+    }
+
     Kirigami.Separator {
         id: emojiPickerLoaderSeparator
         visible: emojiPickerLoader.visible

src/controller.cpp

@@ -29,6 +29,7 @@
 #include <QSysInfo>
 #include <QTimer>
 #include <utility>
+#include <QNetworkConfigurationManager>
 
 #include <signal.h>
 
@@ -56,6 +57,7 @@ using namespace Quotient;
 
 Controller::Controller(QObject *parent)
     : QObject(parent)
+    , m_mgr(new QNetworkConfigurationManager(this))
 {
     Connection::setRoomType<NeoChatRoom>();
     Connection::setUserType<NeoChatUser>();
@@ -110,6 +112,9 @@ Controller::Controller(QObject *parent)
         sigaction(sig, &sa, nullptr);
     }
 #endif
+
+    connect(m_mgr, &QNetworkConfigurationManager::onlineStateChanged,
+            this, &Controller::isOnlineChanged);
 }
 
 Controller::~Controller()
@@ -575,6 +580,11 @@ void Controller::createRoom(const QString &name, const QString &topic)
     });
 }
 
+bool Controller::isOnline() const
+{
+    return m_mgr->isOnline();
+}
+
 void Controller::joinRoom(const QString &alias)
 {
     if (!alias.contains(":")) {

src/controller.h

@@ -10,6 +10,7 @@
 
 #include <KAboutData>
 class QKeySequences;
+class QNetworkConfigurationManager;
 
 #include "connection.h"
 #include "csapi/list_public_rooms.h"
@@ -31,6 +32,7 @@ class Controller : public QObject
     Q_PROPERTY(bool busy READ busy WRITE setBusy NOTIFY busyChanged)
     Q_PROPERTY(KAboutData aboutData READ aboutData WRITE setAboutData NOTIFY aboutDataChanged)
     Q_PROPERTY(bool supportSystemTray READ supportSystemTray CONSTANT)
+    Q_PROPERTY(bool isOnline READ isOnline NOTIFY isOnlineChanged)
 
 public:
     static Controller &instance();
@@ -78,6 +80,7 @@ public:
     /// \brief Join a room.
     Q_INVOKABLE void joinRoom(const QString &alias);
 
+    bool isOnline() const;
 private:
     explicit Controller(QObject *parent = nullptr);
     ~Controller() override;
@@ -126,6 +129,7 @@ Q_SIGNALS:
     void openRoom(NeoChatRoom *room);
     void userConsentRequired(QUrl url);
     void testConnectionResult(const QString &connection, bool usable);
+    void isOnlineChanged(bool isOnline);
 
 public Q_SLOTS:
     void logout(Quotient::Connection *conn, bool serverSideLogout);
@@ -133,6 +137,9 @@ public Q_SLOTS:
     void changeAvatar(Quotient::Connection *conn, const QUrl &localFile);
     static void markAllMessagesAsRead(Quotient::Connection *conn);
     void saveWindowGeometry(QQuickWindow *);
+
+private:
+    QNetworkConfigurationManager *m_mgr;
 };
 
 // TODO libQuotient 0.7: Drop