#ifndef SQLDOCUMENTREGISTRY_H
#define SQLDOCUMENTREGISTRY_H

#include <QList>
#include <memory>
#include <vector>

class SqlDocument;

/** Keeps track of all SQL documents that are still in use, without
 * extending their lifetime. A document lives as long as at least one
 * query tool holds a shared pointer to it.
 */
class SqlDocumentRegistry {
public:
	void add(const std::shared_ptr<SqlDocument> &document);

	/// All documents that are still alive.
	QList<std::shared_ptr<SqlDocument>> documents() const;
	/// All documents that are alive and have unsaved changes.
	QList<std::shared_ptr<SqlDocument>> modifiedDocuments() const;

private:
	std::vector<std::weak_ptr<SqlDocument>> m_documents;
};

#endif // SQLDOCUMENTREGISTRY_H