Add weather routes project progress

WeatherRoutes/mvc/controller/networkmanager.cpp

@@ -0,0 +1,42 @@
+#include "networkmanager.h"
+#include "QStandardPaths"
+#include <QFile>
+#include <QGuiApplication>
+#include <QJsonDocument>
+#include <QNetworkAccessManager>
+#include <QNetworkReply>
+
+NetworkManager *NetworkManager::m_instance;
+
+NetworkManager::NetworkManager(QObject *parent) : QObject{parent} {}
+
+NetworkManager *NetworkManager::Instance() {
+  if (m_instance != nullptr) {
+    return m_instance;
+  }
+  m_instance = new NetworkManager();
+  return m_instance;
+}
+
+void NetworkManager::fetchJSONfromAPI(QUrl url, QJsonDocument &doc)
+{
+    qDebug() << "Fetch URL::" << url.toDisplayString();
+    QNetworkAccessManager m_manager;
+    QNetworkRequest request(url);
+    QNetworkReply *reply = m_manager.get(request);
+    QEventLoop loop;
+    connect(reply, &QNetworkReply::finished, &loop, &QEventLoop::quit);
+    loop.exec();
+    if (reply->error() == QNetworkReply::NoError)
+    {
+        QByteArray response = reply->readAll();
+        doc = QJsonDocument::fromJson(response);
+    }
+    else
+    {
+        qDebug() << "Invalid JSON response:: " << reply->errorString();
+    }
+
+    reply->deleteLater();
+}
+