Учимся пользоваться odb в нашем меленьком проекте

src/restapiserver.cpp

@@ -0,0 +1,129 @@
+#include "restapiserver.h"
+
+#include <QJsonArray>
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QJsonValue>
+
+#include "book_s-odb.hxx"
+#include "book_s.h"
+
+#include <odb/core.hxx>
+#include <odb/database.hxx>
+#include <odb/query.hxx>
+
+RestApiServer::RestApiServer(odb::database& db, QObject* parent) :
+    m_db(db), QTcpServer(parent) {}
+
+void RestApiServer::start(quint16 port)
+{
+    if (!this->listen(QHostAddress::Any, port))
+    {
+        qWarning() << "Ошибка запуска сервера!";
+    }
+    else
+    {
+        qDebug() << "REST API сервер запущен на порту:" << port;
+    }
+}
+
+void RestApiServer::incomingConnection(qintptr socketDescriptor)
+{
+    QTcpSocket* socket = new QTcpSocket(this);
+    socket->setSocketDescriptor(socketDescriptor);
+
+    connect(socket, &QTcpSocket::readyRead, this, &RestApiServer::handleRequest);
+    connect(socket, &QTcpSocket::disconnected, socket, &QTcpSocket::deleteLater);
+}
+
+void RestApiServer::handleRequest()
+{
+    QTcpSocket* socket = qobject_cast<QTcpSocket*>(sender());
+    if (!socket)
+        return;
+
+    QString request = QString::fromUtf8(socket->readAll());
+    QByteArray response = processRequest(request);
+
+    socket->write(response);
+    socket->flush();
+    socket->disconnectFromHost();
+}
+
+QByteArray RestApiServer::processRequest(const QString& request)
+{
+    if (request.startsWith("GET /books/author/"))
+    {
+        QString author = request.section(' ', 1, 1).section('/', 3, 3).replace("%20", " ");
+
+        // Books books;
+        // QList<BookRecord> results = books.getBooksByAuthor(author);
+
+        QByteArray jsonResponse = "{ \"books\": [";
+        // for (const BookRecord& book : results)
+        // {
+        //     jsonResponse += QString("{ \"id\": %1, \"title\": \"%2\", \"author\": \"%3\", \"year\": %4 },")
+        //                     .arg(book.id)
+        //                     .arg(book.title)
+        //                     .arg(book.author)
+        //                     .arg(book.year)
+        //                     .toUtf8();
+        // }
+        // if (results.size() > 0)
+        //     jsonResponse.chop(1); // Убираем последнюю запятую
+        // jsonResponse += "] }";
+
+        return "HTTP/1.1 200 OK\r\nContent-Type: application/json\r\n\r\n" + jsonResponse;
+    }
+
+    if (request.startsWith("GET /books"))
+    {
+        odb::transaction t(m_db.begin());
+        odb::result<Book_S> res(m_db.query<Book_S>());
+
+        QJsonArray jArray;
+
+        for (auto it = res.begin(); it != res.end(); ++it)
+        {
+            const auto& book = *it;
+
+            QJsonObject j;
+            j["id"] = QString::number(book.id());
+            j["title"] = QString::fromStdString(book.name());
+            j["author"] = QString::fromStdString(book.author()->full_name());
+            j["year"] = book.year();
+            jArray.push_back(j);
+        }
+        auto jDoc = QJsonDocument(jArray);
+
+        t.commit();
+
+        return "HTTP/1.1 200 OK\r\nContent-Type: application/json\r\n\r\n" + jDoc.toJson(QJsonDocument::Indented);
+    }
+
+    if (request.startsWith("GET /author"))
+    {
+        odb::transaction t(m_db.begin());
+        odb::result<Author_S> res(m_db.query<Author_S>());
+
+        QJsonArray jArray;
+
+        for (auto it = res.begin(); it != res.end(); ++it)
+        {
+            const auto& author = *it;
+
+            QJsonObject j;
+            j["id"] = QString::number(author.id());
+            j["first"] = QString::fromStdString(author.first());
+            j["last"] = QString::fromStdString(author.last());
+            j["age"] = author.age();
+            jArray.push_back(j);
+        }
+        auto jDoc = QJsonDocument(jArray);
+
+        t.commit();
+        return "HTTP/1.1 200 OK\r\nContent-Type: application/json\r\n\r\n" + jDoc.toJson(QJsonDocument::Indented);
+    }
+
+    return "HTTP/1.1 404 Not Found\r\nContent-Type: text/plain\r\n\r\nNot Found";
+}