[demo] Cache server object so that the same one is used

Author: dantti

demos/demo2/sendemail.cpp

@@ -94,11 +94,29 @@ void SendEmail::on_sendEmail_clicked()
 void SendEmail::sendMailAsync(const MimeMessage &msg)
 {
     qDebug() << "sendMailAsync";
-    auto server = new Server(this);
-    server->setHost(ui->host->text());
-    server->setPort(quint16(ui->port->value()));
-    server->setConnectionType(ui->security->currentIndex() == 0 ? Server::TcpConnection :
-                                                                  ui->security->currentIndex() == 1 ? Server::SslConnection : Server::TlsConnection);
+
+    const QString host = ui->host->text();
+    const quint16 port(ui->port->value());
+    const Server::ConnectionType ct = ui->security->currentIndex() == 0 ?
+                Server::TcpConnection : ui->security->currentIndex() == 1 ?
+                    Server::SslConnection : Server::TlsConnection;
+
+    Server *server = nullptr;
+    for (auto srv : m_aServers) {
+        if (srv->host() == host && srv->port() == port & srv->connectionType() == ct) {
+            server = srv;
+            break;
+        }
+    }
+
+    if (!server) {
+        server = new Server(this);
+        server->setHost(host);
+        server->setPort(port);
+        server->setConnectionType(ct);
+        m_aServers.push_back(server);
+    }
+
     const QString user = ui->username->text();
     if (!user.isEmpty()) {
         server->setAuthMethod(Server::AuthLogin);

demos/demo2/sendemail.h

@@ -26,6 +26,10 @@ namespace Ui {
     class SendEmail;
 }
 
+namespace SimpleMail {
+class Server;
+}
+
 using namespace SimpleMail;
 
 class SendEmail : public QWidget
@@ -45,6 +49,7 @@ private Q_SLOTS:
 
 private:
     QSettings m_settings;
+    std::vector<Server *> m_aServers;
     Ui::SendEmail *ui;
 
     void errorMessage(const QString & message);