/*
 * LinShare is an open source filesharing software, part of the LinPKI software
 * suite, developed by Linagora.
 * 
 * Copyright (C) 2014 LINAGORA
 * 
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any
 * later version, provided you comply with the Additional Terms applicable for
 * LinShare software by Linagora pursuant to Section 7 of the GNU Affero General
 * Public License, subsections (b), (c), and (e), pursuant to which you must
 * notably (i) retain the display of the “LinShare™” trademark/logo at the top
 * of the interface window, the display of the “You are using the Open Source
 * and free version of LinShare™, powered by Linagora © 2009–2014. Contribute to
 * Linshare R&D by subscribing to an Enterprise offer!” infobox and in the
 * e-mails sent with the Program, (ii) retain all hypertext links between
 * LinShare and linshare.org, between linagora.com and Linagora, and (iii)
 * refrain from infringing Linagora intellectual property rights over its
 * trademarks and commercial brands. Other Additional Terms apply, see
 * <http://www.linagora.com/licenses/> for more details.
 * 
 * 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 Affero General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU Affero General Public License and
 * its applicable Additional Terms for LinShare along with this program. If not,
 * see <http://www.gnu.org/licenses/> for the GNU Affero General Public License
 * version 3 and <http://www.linagora.com/licenses/> for the Additional Terms
 * applicable to LinShare software.
 */
package org.linagora.linshare.view.tapestry.services.impl;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringWriter;
import java.util.Map;
import java.util.Set;

import org.apache.commons.lang.StringUtils;
import org.linagora.linshare.core.exception.TechnicalErrorCode;
import org.linagora.linshare.core.exception.TechnicalException;
import org.linagora.linshare.view.tapestry.services.Templating;

public class MailTemplating implements Templating {

	public String getMessage(InputStream template,
			Map<String, String> parameters) {
		String templateContent = readFullyTemplateContent(template);

		return getMessage(templateContent, parameters);
	}

	public String getMessage(String templateContent,
			Map<String, String> parameters) {
		Set<Map.Entry<String, String>> params = parameters.entrySet();

		for (Map.Entry<String, String> entry : params) {
			templateContent = StringUtils.replace(templateContent,
					entry.getKey(), entry.getValue());
		}
		return templateContent;
	}

	public String readFullyTemplateContent(InputStream template) {
		String content = "";
		StringWriter writer = new StringWriter();

		try {
			InputStreamReader streamReader = new InputStreamReader(template);
			BufferedReader buffer = new BufferedReader(streamReader);
			String line = "";
			while (null != (line = buffer.readLine())) {
				writer.write(line + "\n");
			}
			content = writer.toString();
		} catch (IOException e) {
			throw new TechnicalException(TechnicalErrorCode.MAIL_EXCEPTION,
					"The template is not valid", e);
		} catch (Exception ex) {
			throw new TechnicalException(TechnicalErrorCode.MAIL_EXCEPTION,
					"The template is not valid", ex);
		}
		return content;
	}
}
