EmailTemplate.java

/*
 * Copyright 2007 Zhang, Zheng <oldbig@gmail.com>
 * 
 * This file is part of ZOJ.
 * 
 * ZOJ 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 revision 3 of the License, or (at your option) any later revision.
 * 
 * ZOJ 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 ZOJ. if not, see
 * <http://www.gnu.org/licenses/>.
 */

package cn.edu.zju.acm.onlinejudge.util;

import java.util.Properties;

public class EmailTemplate {
    private final String title;
    private final String replayTo;
    private final String content;

    public EmailTemplate(String title, String replyTo, String content) {
        this.title = title;
        this.replayTo = replyTo;
        this.content = content;
    }

    public String getTitle() {
        return this.title;
    }

    public String getReplayTo() {
        return this.replayTo;
    }

    public String getContent() {
        return this.content;
    }

    public String getTitle(Properties properties) {
        return this.render(this.title, properties);
    }

    public String getReplayTo(Properties properties) {
        return this.render(this.replayTo, properties);
    }

    public String getContent(Properties properties) {
        return this.render(this.content, properties);
    }

    public String render(String text, Properties properties) {
        StringBuilder sb = new StringBuilder();
        int k = 0;
        for (;;) {
            int i = text.indexOf('$', k);
            if (i == -1) {
                break;
            }
            int j = text.indexOf('$', i + 1);
            if (j == -1) {
                break;
            }
            sb.append(text.substring(k, i));
            if (i + 1 == j) {
                sb.append('$');
            } else {
                String key = text.substring(i + 1, j);
                if (properties.containsKey(key)) {
                    sb.append(properties.getProperty(key));
                } else {
                    sb.append('$').append(key).append('$');
                }
            }
            k = j + 1;
        }
        sb.append(text.substring(k));
        return sb.toString();
    }
}