/**
 *
 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either 
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public 
 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 * 
 **/
/**
 * Implements the CFML Function gettempfile
 */
package lucee.runtime.functions.system;

import java.io.IOException;

import lucee.commons.io.res.Resource;
import lucee.commons.io.res.util.ResourceUtil;
import lucee.runtime.PageContext;
import lucee.runtime.exp.ExpressionException;
import lucee.runtime.exp.PageException;
import lucee.runtime.ext.function.Function;
import lucee.runtime.op.Caster;

public final class GetTempFile implements Function {
    public static String call(PageContext pc, String strDir, String prefix) throws PageException {
	Resource dir = ResourceUtil.toResourceExisting(pc, strDir);
	pc.getConfig().getSecurityManager().checkFileLocation(dir);
	if (!dir.isDirectory()) throw new ExpressionException(strDir + " is not a directory");
	int count = 1;
	Resource file;
	while ((file = dir.getRealResource(prefix + pc.getId() + count + ".tmp")).exists()) {
	    count++;
	}
	try {
	    file.createFile(false);
	    // file.createNewFile();
	    return file.getCanonicalPath();
	}
	catch (IOException e) {
	    throw Caster.toPageException(e);
	}
    }
}