Gutenberg: Fix #20

Gutenberg-related services (e.g., 'Online library') will now show an error message if they can't connect to the Internet and refuse to launch.

functions.h

@@ -693,6 +693,21 @@ namespace {
         close(ntxfd);
         return !!ptr;
     }
+    int testPing() {
+        QString pingProg = "ping";
+        QStringList pingArgs;
+        pingArgs << "-c" << "1" << "1.1.1.1";
+        QProcess *pingProcess = new QProcess();
+        pingProcess->start(pingProg, pingArgs);
+        pingProcess->waitForFinished();
+        int exitCode = pingProcess->exitCode();
+        pingProcess->deleteLater();
+        if(exitCode == 0) {
+            global::network::isConnected = true;
+        }
+        return exitCode;
+    }
+
 }
 
 #endif // FUNCTIONS_H

generaldialog.cpp

@@ -380,6 +380,7 @@ void generalDialog::on_okBtn_clicked()
                     }
                 }
                 else if(ui->searchComboBox->currentText() == "Online library") {
+                    if(testPing() == 0) {
                         string_writeconfig("/inkbox/searchComboBoxFunction", "Online library");
 
                         if(!readFile("/external_root/opt/storage/gutenberg/last_sync").isEmpty()) {
@@ -415,7 +416,8 @@ void generalDialog::on_okBtn_clicked()
                         searchTimer->start();
                     }
                     else {
-                    ;
+                        emit showToast("Wi-Fi connection error");
+                    }
                 }
             }
             else {

mainwindow.cpp

@@ -902,21 +902,6 @@ void MainWindow::setupSearchDialog() {
     }
 }
 
-int MainWindow::testPing() {
-    QString pingProg = "ping";
-    QStringList pingArgs;
-    pingArgs << "-c" << "1" << "1.1.1.1";
-    QProcess *pingProcess = new QProcess();
-    pingProcess->start(pingProg, pingArgs);
-    pingProcess->waitForFinished();
-    int exitCode = pingProcess->exitCode();
-    pingProcess->deleteLater();
-    if(exitCode == 0) {
-        global::network::isConnected = true;
-    }
-    return exitCode;
-}
-
 void MainWindow::updateWifiIcon(int mode) {
     /* Usage:
      * mode 0: auto
@@ -1101,6 +1086,7 @@ void MainWindow::openEncfsRepackDialog() {
 
 void MainWindow::on_libraryButton_clicked()
 {
+    if(testPing() == 0) {
         resetFullWindowException = false;
         resetWindow(false);
         if(global::mainwindow::tabSwitcher::libraryWidgetSelected != true) {
@@ -1121,8 +1107,9 @@ void MainWindow::on_libraryButton_clicked()
             // Repaint
             this->repaint();
         }
+    }
     else {
-        ;
+        showToast("Wi-Fi connection error");
     }
 }
 

mainwindow.h

@@ -58,7 +58,6 @@ public:
     void openUsbmsDialog();
     void resetIcons();
     void setBatteryIcon();
-    int testPing();
     bool checkWifiState();
 
 public slots: