The basic part of the application is written

The library nlohmann::json was removed (now QJson*), working class Network and idle handler.

src/Influence.pro

@@ -27,38 +27,12 @@ SOURCES += \
     main.cpp \
     mainwindow.cpp \
     kernel/network.cpp \
-    main.cpp \
-    mainwindow.cpp
+    kernel/handler.cpp
 
 HEADERS += \
-        mainwindow.h \
     kernel/network.hpp \
-    lib/json/detail/conversions/from_json.hpp \
-    lib/json/detail/conversions/to_chars.hpp \
-    lib/json/detail/conversions/to_json.hpp \
-    lib/json/detail/input/binary_reader.hpp \
-    lib/json/detail/input/input_adapters.hpp \
-    lib/json/detail/input/lexer.hpp \
-    lib/json/detail/input/parser.hpp \
-    lib/json/detail/iterators/internal_iterator.hpp \
-    lib/json/detail/iterators/iter_impl.hpp \
-    lib/json/detail/iterators/iteration_proxy.hpp \
-    lib/json/detail/iterators/json_reverse_iterator.hpp \
-    lib/json/detail/iterators/primitive_iterator.hpp \
-    lib/json/detail/output/binary_writer.hpp \
-    lib/json/detail/output/output_adapters.hpp \
-    lib/json/detail/output/serializer.hpp \
-    lib/json/detail/exceptions.hpp \
-    lib/json/detail/json_pointer.hpp \
-    lib/json/detail/json_ref.hpp \
-    lib/json/detail/macro_scope.hpp \
-    lib/json/detail/macro_unscope.hpp \
-    lib/json/detail/meta.hpp \
-    lib/json/detail/value_t.hpp \
-    lib/json/adl_serializer.hpp \
-    lib/json/json.hpp \
-    lib/json/json_fwd.hpp \
-    mainwindow.h
+    mainwindow.h \
+    kernel/handler.hpp
 
 FORMS += \
         mainwindow.ui

src/kernel/handler.cpp

@@ -0,0 +1,25 @@
+#include "handler.hpp"
+
+Handler::Handler()
+{
+    network = new Network();
+    connect(network, &Network::json_received, this, &Handler::handle);
+}
+
+
+void Handler::handle(QJsonObject jsonReceived)
+{
+    QJsonObject jsonSend;
+    if(jsonReceived["action"] == "createSession" && !jsonReceived.contains("status"))
+    {
+        jsonSend["peerID"] = QHostAddress("::1").toString();
+        jsonSend["action"] = "createSession";
+        jsonSend["status"] = true;
+        QString peerReceiver = jsonReceived["peerID"].toString();
+        network->sendDatagram(jsonSend, peerReceiver);
+    }
+    else
+    {
+        emit createSessionSuccess();
+    }
+}

src/kernel/handler.hpp

@@ -0,0 +1,18 @@
+#pragma once
+
+#include "network.hpp"
+#include <QJsonObject>
+
+class Handler : public QObject
+{
+    Q_OBJECT
+
+    public:
+        Handler();
+    signals:
+        createSessionSuccess();
+    private:
+        Network *network;
+    private slots:
+        void handle(QJsonObject jsonReceived);
+};

src/kernel/network.cpp

@@ -1,25 +1,23 @@
+#include "network.hpp"
 Network::Network()
 {
     udpSocket = new QUdpSocket(this);
     udpSocket->bind(QHostAddress::AnyIPv6, 6552);
-    connect(udpSocket, SIGNAL(readyRead()), this, SLOT(readPendingDatagrams()));
+    connect(udpSocket, SIGNAL(readyRead()), this, SLOT(processTheDatagram()));
 }
-void Network::readPendingDatagrams()
-{
-    while (udpSocket->hasPendingDatagrams()) {
-        QNetworkDatagram datagram = udpSocket->receiveDatagram();
-        processTheDatagram(datagram);
-    }
-}
-void Network::sendDatagram(json *j, QHostAddress ip)
+
+void Network::sendDatagram(QJsonObject j, QString s)
 {
+    QHostAddress ip = QHostAddress(s);
     QByteArray baDatagram;
-    QDataStream out(&baDatagram, QIODevice::WriteOnly);
-    QString s = j.dump();
-    out << s;
-    udpSocket->writeDatagram(baDatagram, ip, 6552);
+    //QDataStream out(&baDatagram, QIODevice::WriteOnly);
+    QJsonDocument jbuff = QJsonDocument(j);
+    quint16 p = 6552;
+    baDatagram = jbuff.toJson(QJsonDocument::Compact);
+    udpSocket->writeDatagram(baDatagram, ip, p);
 }
-json Network::processTheDatagram()
+
+void Network::processTheDatagram()
 {
     QByteArray baDatagram;
     do {
@@ -27,10 +25,9 @@ json Network::processTheDatagram()
         udpSocket->readDatagram (baDatagram.data(), baDatagram.size()) ;
     } while (udpSocket->hasPendingDatagrams()) ;
 
-    QString buff;
-    QDataStream in(&baDatagram, QIODevice::Readonly);
-    in >> buff;
-    json j = new json;
-    j = json::parse(buff);
-    return json;
+    QJsonDocument jbuff = QJsonDocument::fromJson(baDatagram);
+    QJsonObject j = QJsonObject(jbuff.object());
+    //QDataStream in(&baDatagram, QIODevice::ReadOnly);
+    //in >> jbuff.fromBinaryData(baDatagram);
+    emit json_received(j);
 }

src/kernel/network.hpp

@@ -1,16 +1,21 @@
-#include "../lib/json/json.hpp"
-#include <QtNetwork>
+#pragma once
 
-class Network
+#include <QtNetwork>
+#include <QJsonObject>
+#include <QJsonDocument>
+
+class Network : public QObject
 {
-    using json = nlohmann::json;
+    Q_OBJECT
 
     private:
         QUdpSocket* udpSocket;
     public:
         Network();
     public slots:
-        void sendDatagram();
+        void sendDatagram(QJsonObject j, QString s);
+    signals:
+        void json_received(QJsonObject &jsonReceived);
     private slots:
-        void readPendingDatagrams();
+        void processTheDatagram();
 };

src/mainwindow.cpp

@@ -6,9 +6,41 @@ MainWindow::MainWindow(QWidget *parent) :
     ui(new Ui::MainWindow)
 {
     ui->setupUi(this);
+    network = new Network();
+    handler = new Handler();
 }
 
 MainWindow::~MainWindow()
 {
     delete ui;
 }
+
+void MainWindow::on_connectToPeer_clicked()
+{
+    QJsonObject j;
+    j["peerID"] = QHostAddress("::1").toString();
+    j["action"] = "createSession";
+    QString s = ui->peerID->text();
+    network->sendDatagram(j, s);
+    timer = new QTimer();
+    connect(handler, &Handler::createSessionSuccess, this, &MainWindow::peerReceiverConnected);
+    connect(timer, SIGNAL(timeout()), this, SLOT(slotTimerAlarm()));
+    timer->start(10000);
+}
+
+void MainWindow::slotTimerAlarm()
+{
+    if(!receive)
+    {
+        int ret = QMessageBox::critical(this,QObject::tr("Error"),tr("Timeout Error"));
+        timer->stop();
+        delete timer;
+    }
+
+}
+
+void MainWindow::peerReceiverConnected()
+{
+    receive = true;
+    int ret = QMessageBox::information(this,QObject::tr("Info"),tr("Peer available!"));
+}

src/mainwindow.h

@@ -1,7 +1,12 @@
-#ifndef MAINWINDOW_H
-#define MAINWINDOW_H
+#pragma once
 
 #include <QMainWindow>
+#include "kernel/network.hpp"
+#include "kernel/handler.hpp"
+#include <QMessageBox>
+#include <QJsonObject>
+#include <QJsonDocument>
+
 
 namespace Ui {
     class MainWindow;
@@ -14,9 +19,17 @@ class MainWindow : public QMainWindow
     public:
         explicit MainWindow(QWidget *parent = 0);
         ~MainWindow();
+    public slots:
+        void peerReceiverConnected();
+    private slots:
+        void on_connectToPeer_clicked();
+        void slotTimerAlarm();
 
     private:
         Ui::MainWindow *ui;
-};
+        QTimer *timer;
+        Network *network;
+        Handler *handler;
 
-#endif // MAINWINDOW_H
+    bool receive;
+};

src/mainwindow.ui

@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <ui version="4.0">
  <class>MainWindow</class>
  <widget class="QMainWindow" name="MainWindow">
@@ -5,20 +6,48 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>400</width>
-    <height>300</height>
+    <width>331</width>
+    <height>132</height>
    </rect>
   </property>
-  <property name="windowTitle" >
-   <string>MainWindow</string>
+  <property name="minimumSize">
+   <size>
+    <width>331</width>
+    <height>132</height>
+   </size>
+  </property>
+  <property name="maximumSize">
+   <size>
+    <width>331</width>
+    <height>132</height>
+   </size>
+  </property>
+  <property name="cursor">
+   <cursorShape>ArrowCursor</cursorShape>
+  </property>
+  <property name="windowTitle">
+   <string>Influence</string>
+  </property>
+  <widget class="QWidget" name="centralWidget">
+   <layout class="QHBoxLayout" name="horizontalLayout_2">
+    <item>
+     <widget class="QLineEdit" name="peerID">
+      <property name="text">
+       <string/>
       </property>
-  <widget class="QMenuBar" name="menuBar" />
-  <widget class="QToolBar" name="mainToolBar" />
-  <widget class="QWidget" name="centralWidget" />
-  <widget class="QStatusBar" name="statusBar" />
      </widget>
- <layoutDefault spacing="6" margin="11" />
- <pixmapfunction></pixmapfunction>
+    </item>
+    <item>
+     <widget class="QPushButton" name="connectToPeer">
+      <property name="text">
+       <string>Подключиться</string>
+      </property>
+     </widget>
+    </item>
+   </layout>
+  </widget>
+ </widget>
+ <layoutdefault spacing="6" margin="11"/>
  <resources/>
  <connections/>
 </ui>