Basic JSON RESTful client fetching items from a local server at application start and adding them to the model.

network/servercommunicator.cpp

@@ -0,0 +1,60 @@
+#include "servercommunicator.h"
+#include "apiroutes.h"
+
+#include <QJsonArray>
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QRestReply>
+
+using namespace Qt::StringLiterals;
+
+ServerCommunicator::ServerCommunicator(QObject* parent)
+    : QObject{parent} {
+  m_netManager.setAutoDeleteReplies(true);
+  m_restManager = std::make_shared<QRestAccessManager>(&m_netManager);
+  m_serviceApi  = std::make_shared<QNetworkRequestFactory>();
+  setUrl(baseUrl);
+}
+
+bool ServerCommunicator::sslSupported() {
+#if QT_CONFIG(ssl)
+  return QSslSocket::supportsSsl();
+#else
+  return false;
+#endif
+}
+
+QUrl ServerCommunicator::url() const { return m_serviceApi->baseUrl(); }
+
+void ServerCommunicator::setUrl(const QUrl& url) {
+  if (m_serviceApi->baseUrl() == url) {
+    return;
+  }
+  m_serviceApi->setBaseUrl(url);
+  QHttpHeaders authenticationHeaders;
+  m_serviceApi->setCommonHeaders(authenticationHeaders);
+  emit urlChanged();
+}
+
+void ServerCommunicator::fetchItems() {
+  /// Set up a GET request
+  m_restManager->get(m_serviceApi->createRequest(ROUTE_ITEMS), this, [this](QRestReply& reply) {
+    if (reply.isSuccess()) {
+      qInfo() << "Fetching items successful.";
+      const QJsonDocument doc = reply.readJson().value();
+      emit itemsFetched(doc.toJson());
+
+    } else {
+      if (reply.hasError()) {
+        const QString errorString = reply.errorString();
+        qCritical() << "ERROR:" << errorString;
+        emit itemsFetchFailure(errorString);
+      } else {
+        int statusCode = reply.httpStatus();
+        qCritical() << "ERROR:" << statusCode;
+        emit itemsFetchFailure(QString::number(statusCode));
+        emit itemsFetchFailure(QString("HTTP status code: %1").arg(statusCode));
+      }
+    }
+  });
+}