Move db delete to the postgresql backend lib.

include/backends/postgresql/delete.hpp

@@ -0,0 +1,38 @@
+/* Copyright 2015, 2016, Michele Santullo
+ * This file is part of "dindexer".
+ *
+ * "dindexer" is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * "dindexer" is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with "dindexer".  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef idB070B86E0E4047B1AF4144DEF2759F3C
+#define idB070B86E0E4047B1AF4144DEF2759F3C
+
+#include <functional>
+#include <vector>
+#include <string>
+#include <cstdint>
+#include <map>
+
+namespace dinlib {
+	struct SettingsDB;
+} //namespace dinlib
+
+namespace din {
+	using IDDescMap = std::map<uint32_t, std::string>;
+	using ConfirmDeleCallback = std::function<bool(const IDDescMap&)>;
+
+	void delete_group_from_db ( const dinlib::SettingsDB& parDB, const std::vector<uint32_t>& parIDs, ConfirmDeleCallback parConf );
+} //namespace din
+
+#endif