Added list of databases and roles.

Roles works for atleast 9.3 and up.

Reorganizing code for communicating with database.

src/PgContainer.h

@@ -5,11 +5,17 @@
 #include <vector>
 #include <pgsql/libpq-fe.h>
 
+class PgsqlDatabaseCatalogue;
+
 template<typename T>
 class PgContainer {
 public:
 	using t_Container = std::vector<T>; ///< Do not assume it will stay a vector only expect bidirectional access
 
+	explicit PgContainer(PgsqlDatabaseCatalogue *cat)
+		: m_catalogue(cat)
+	{}
+
 	typename t_Container::const_iterator begin() const
 	{
 		return m_container.begin();
@@ -54,6 +60,7 @@ public:
 		return m_container.at(idx);
 	}
 protected:
+	PgsqlDatabaseCatalogue *m_catalogue;
 	t_Container m_container;
 private:
 	T m_invalidInstance;