cn.vlabs.umt.common.mail.MessageFormatter.java Source code

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Here is the source code for cn.vlabs.umt.common.mail.MessageFormatter.java

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/*
 * Copyright (c) 2008-2013 Computer Network Information Center (CNIC), Chinese Academy of Sciences.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License. 
 *
 */
package cn.vlabs.umt.common.mail;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.UnsupportedEncodingException;
import java.util.Enumeration;
import java.util.Locale;
import java.util.Properties;

import org.apache.commons.lang.StringUtils;
import org.apache.log4j.Logger;

import cn.vlabs.umt.common.util.CommonUtils;

public class MessageFormatter {
    public MessageFormatter(String path) {
        this.path = path;
    }

    public String getContent(Locale locale, String templateName, Properties props) throws TemplateNotFound {
        String all = getFormattedMessage(locale, templateName, props);
        String content = "";
        if (all == null || "".equals(all.trim())) {
            return content;
        }
        int index = all.indexOf(EmailTemplate.SIGN_CONTENT);
        if (index > 0) {
            content = all.substring(index + EmailTemplate.SIGN_CONTENT.length());
        }
        return CommonUtils.trim(content);
    }

    public String getTitle(Locale locale, String templateName, Properties props) throws TemplateNotFound {
        String all = getFormattedMessage(locale, templateName, props);
        String title = "";
        if (all == null || "".equals(all.trim())) {
            return title;
        }
        int indexBegin = all.indexOf(EmailTemplate.SIGN_TITLE);
        int indexEnd = all.indexOf(EmailTemplate.SIGN_CONTENT);
        if (indexBegin >= 0) {
            if (indexEnd > indexBegin) {
                title = all.substring(indexBegin + EmailTemplate.SIGN_TITLE.length(), indexEnd);
            } else {
                title = all.substring(indexBegin + EmailTemplate.SIGN_TITLE.length());
            }
        }
        return CommonUtils.trim(title);
    }

    public String getFormattedMessage(Locale locale, String emailTemplateTarget, Properties prop)
            throws TemplateNotFound {
        String content = readTemplate(locale, emailTemplateTarget);
        if (prop != null) {
            Enumeration<Object> iter = prop.keys();
            while (iter.hasMoreElements()) {
                String key = (String) iter.nextElement();
                String value = prop.getProperty(key);
                if (value == null) {
                    value = "";
                }
                content = StringUtils.replace(content, "%" + key + "%", value);
            }
        }
        return CommonUtils.trim(content);
    }

    private String readTemplate(Locale locale, String templateName) throws TemplateNotFound {
        StringBuffer content = new StringBuffer();
        Reader reader = null;
        String templateFileDir = path;
        try {
            templateFileDir = path + "/" + locale.toString();
            File f = new File(templateFileDir);
            if (!f.exists()) {
                templateFileDir = path + "/en_US";
            }
            templateFileDir = templateFileDir + "/" + templateName;
            reader = new InputStreamReader(new FileInputStream(templateFileDir), "UTF-8");

            int num = 0;
            while ((num = reader.read(buff)) != -1) {
                content.append(buff, 0, num);
            }
        } catch (FileNotFoundException e) {
            throw new TemplateNotFound(templateFileDir);
        } catch (UnsupportedEncodingException e) {
            log.error("????");
            log.debug("?", e);
        } catch (IOException e) {
            log.error("????");
            log.debug("?", e);
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e) {
                    log.debug("??");
                }
            }
        }
        return content.toString();
    }

    private static Logger log = Logger.getLogger(MessageFormatter.class);
    private String path;
    private char[] buff = new char[1024];
}