/*
 * Copyright (C) 2012 - Juan Ferrer Toribio
 *
 * This program 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.
 *
 * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include "sql-update.h"

/**
 * SECTION: sql-update
 * @Short_description: an SQL UPDATE statement 
 * @Title: SqlUpdate
 * 
 * Represents an SQL UPDATE statement.
 **/
G_DEFINE_TYPE (SqlUpdate, sql_update, SQL_TYPE_DML);

SqlObject * sql_update_new ()
{
	return g_object_new (SQL_TYPE_UPDATE, NULL);
}

//+++++++++++++++++++++++++++++++++++++++++++++++++++ Private

static void sql_update_render (SqlUpdate * obj, SqlRender * render)
{
	sql_render_add_list (render, TRUE, "UPDATE", SQL_DML (obj)->targets, ",");

	if (SQL_DML (obj)->targets)
	{
		sql_render_add_list (render, TRUE, "SET", obj->sets, ",");
		sql_render_add_item (render, FALSE, "WHERE", SQL_DML (obj)->where);
	}
}

//+++++++++++++++++++++++++++++++++++++++++++++++++++ Public

void sql_update_add_set (SqlUpdate * obj, SqlField * field, SqlExpr * expr)
{
	g_return_if_fail (SQL_IS_UPDATE (obj));
	g_return_if_fail (SQL_IS_FIELD (field) && SQL_IS_EXPR (expr));
}

//+++++++++++++++++++++++++++++++++++++++++++++++++++ Properties

enum
{
	 PROP_SETS = 1
};

static void sql_update_set_property (SqlUpdate * obj, guint id,
	const GValue * value, GParamSpec * pspec)
{
	switch (id)
	{
		case PROP_SETS:
			sql_object_remove (obj, obj->sets);
			obj->sets = sql_object_add (obj, g_value_get_object (value));
			break;
		default:		
			G_OBJECT_WARN_INVALID_PROPERTY_ID (obj, id, pspec);
	}
}

static void sql_update_get_property (SqlUpdate * obj, guint id,
	GValue * value, GParamSpec * pspec)
{	
	switch (id)
	{
		case PROP_SETS:
			g_value_set_object (value, obj->sets);
			break;
		default:		
			G_OBJECT_WARN_INVALID_PROPERTY_ID (obj, id, pspec);
	}
}

//+++++++++++++++++++++++++++++++++++++++++++++++++++ Class

static void sql_update_init (SqlUpdate * obj)
{	
	obj->sets = NULL;
}

static void sql_update_finalize (SqlUpdate * obj)
{
	sql_object_remove (obj, obj->sets);
	G_OBJECT_CLASS (sql_update_parent_class)->finalize (G_OBJECT (obj));
}

static void sql_update_class_init (SqlUpdateClass * klass)
{
	GObjectClass * k = G_OBJECT_CLASS (klass);
	k->finalize = (GObjectFinalizeFunc) sql_update_finalize;
	k->set_property = (GObjectSetPropertyFunc) sql_update_set_property;
	k->get_property = (GObjectGetPropertyFunc) sql_update_get_property;
	SQL_OBJECT_CLASS (klass)->render = (SqlRenderFunc) sql_update_render;
	
	g_object_class_install_property (k, PROP_SETS,
		sql_param_list ("sets"
			,("Sets")
			,("A list of sets")
			,SQL_TYPE_UPDATE_SET
			,G_PARAM_READWRITE | G_PARAM_CONSTRUCT
	));
}