feat: add sql init

src/LicenseModel/LicenseModel.cpp

@@ -1,16 +1,44 @@
 #include "LicenseModel.h"
 
+// Qt
+#include <QtSql/QSqlDatabase>
+#include <QtSql/QSqlQuery>
+#include <QtSql/QSqlError>
+#include <QDebug>
+
+// Self
+#include "../def.h"
+
 const static int COLUMN_COUNT = 9;
 
 LicenseModel::LicenseModel(QObject* parent)
     : QAbstractTableModel(parent)
 {
+    QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
+    db.setDatabaseName(DB_PATH);
 
+    if (!db.open())
+    {
+        m_status = Status::DbExistError;
+        m_errors.append("Database connection failed: " + db.lastError().text());
+    }
+    else
+    {
+        if (!checkTables())
+        {
+            m_status = Status::DbStructError;
+            m_errors.append("Database tables are not valid");
+        }
+        else
+        {
+            m_status = Status::Ok;
+        }
+    }
 }
 
 LicenseModel::~LicenseModel()
 {
-
+    m_db.close();
 }
 
 int LicenseModel::rowCount(const QModelIndex &parent) const
@@ -77,5 +105,17 @@ LicenseModel::Status LicenseModel::getStatus()
 
 QString LicenseModel::getStatusText()
 {
-    return m_errors.join('n');
+    return m_errors.join('\n');
+}
+
+bool LicenseModel::checkTables()
+{
+    bool clienttableExist = false;
+    for (const auto &table : m_db.tables())
+    {
+        if (table == "clients")
+            return true;
+    }
+    if (!clienttableExist)
+        return false;
 }