Add a startup logger to the runtime to aid with debugging.

runtime/Logger.cpp

@@ -0,0 +1,59 @@
+//////////////////////////////////////////////////////////////////////////
+//
+// pgAdmin 4 - PostgreSQL Tools
+//
+// Copyright (C) 2013 - 2018, The pgAdmin Development Team
+// This software is released under the PostgreSQL Licence
+//
+// Logger.cpp - Logger Utility
+//
+//////////////////////////////////////////////////////////////////////////
+
+#include "pgAdmin4.h"
+#include "Logger.h"
+Logger* Logger::m_pThis = NULL;
+QString Logger::m_sFileName = "";
+QFile* Logger::m_Logfile = NULL;
+
+Logger::Logger()
+{
+}
+Logger::~Logger()
+{
+}
+
+Logger* Logger::GetLogger()
+{
+    if (m_pThis == NULL)
+    {
+        m_pThis = new Logger();
+        m_sFileName = QDir::homePath() + (QString("/.%1.startup.log").arg(PGA_APP_NAME)).remove(" ");
+        m_Logfile = new QFile;
+        m_Logfile->setFileName(m_sFileName);
+        m_Logfile->open(QIODevice::WriteOnly | QIODevice::Text);
+        m_Logfile->setPermissions(QFile::ReadOwner|QFile::WriteOwner);
+    }
+
+    return m_pThis;
+}
+
+void Logger::Log(const QString& sMessage)
+{
+    QString text = QDateTime::currentDateTime().toString("dd.MM.yyyy hh:mm:ss ") + sMessage + "\n";
+    if (m_Logfile != NULL)
+    {
+        QTextStream out(m_Logfile);
+        out << text;
+    }
+}
+
+void Logger::ReleaseLogger()
+{
+    if (m_pThis != NULL)
+    {
+        if(m_Logfile != NULL)
+            m_Logfile->close();
+        delete m_pThis;
+        m_pThis = NULL;
+    }
+}