/*
* ====================================================================
* Copyright (C) 1997-2008 by Naijatek.com
*
* All copyright notices regarding MyAlumni MUST remain
* intact in the scripts and in the outputted HTML.
* The "powered by" text/logo with a link back to
* http://www.naijatek.com in
* the footer of the pages MUST remain visible when the pages
* are viewed on the internet or intranet.
*
* 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 2 of the License, or
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Support can be obtained from support forums at:
* http://www.naijatek.com/myalumni/forum
*
* Correspondence and Marketing Questions can be sent to:
* info at naijatek com
*
* <p>Title: MyAlumni </p>
* <p>Description: This system helps keep alive the line of communications between alumni/alumnus</p>
* <p>Copyright: Copyright (c) 1997-2008</p>
* <p>Company: Naijatek Solutions (http://www.naijatek.com)</p>
* @author Folashade Adeyosoye (shardayyy@naijatek.com)
* @version 1.0
*/
package net.naijatek.myalumni.util.utilities;
import java.util.StringTokenizer;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import net.naijatek.myalumni.framework.exceptions.BadInputException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.web.context.ContextLoaderServlet;
public class MailUtil extends ContextLoaderServlet{
private static Log logger = LogFactory.getLog(MailUtil.class);
public MailUtil() {// prevent instantiation
}
public static void checkGoodEmail(final String input) throws BadInputException {
if (input == null) {
throw new BadInputException("Sorry, null string is not a good email.");
}
int atIndex = input.indexOf('@');
int dotIndex = input.lastIndexOf('.');
if (atIndex == -1 || dotIndex == -1 || atIndex >= dotIndex) {
throw new BadInputException("Error: '" + input + "' is not a valid email value. Please try again.");
}
// now check for content of the string
byte[] s = input.getBytes();
int length = s.length;
byte b = 0;
for (int i = 0; i < length; i++) {
b = s[i];
if (b >= 'a' && b <= 'z') {
// lower char
} else if (b >= 'A' && b <= 'Z') {
// upper char
} else if (b >= '0' && b <= '9' && i != 0) {
// numeric char
} else if ( ( b=='_' || b=='-' || b=='.' || b=='@' ) && i != 0 ) {
// _ char
} else {
// not good char, throw an BadInputException
throw new BadInputException(input + " is not a valid email. Reason: character '" + (char)b + "' is not accepted in an email.");
}
}// for
// last check
try {
new javax.mail.internet.InternetAddress(input);
} catch (Exception ex) {
logger.error("Error when running checkGoodEmail", ex);
throw new BadInputException("Assertion: dont want to occur in Util.checkGoodEmail");
}
}
/**
* This method trim the email variable, so if it contains only spaces, then
* it will be empty string, then we have 0 token :-) The returned value is
* never null
*
* @param email String
* @throws BadInputException
* @return String[]
*/
private static String[] getEmails(String email) throws BadInputException {
if (email == null) {
email = "";
}
email = email.trim();// very important
StringTokenizer t = new StringTokenizer(email, ";");
String[] ret = new String[t.countTokens()];
int index = 0;
while(t.hasMoreTokens()) {
String mail = t.nextToken().trim();
checkGoodEmail(mail);
ret[index] = mail;
//log.debug(ret[index]);
index++;
}
return ret;
}
private static String[] getEmails(final String to, final String cc, final String bcc) throws BadInputException {
String[] toMail = getEmails(to);
String[] ccMail = getEmails(cc);
String[] bccMail= getEmails(bcc);
String[] ret = new String[toMail.length + ccMail.length + bccMail.length];
int index = 0;
for (String element : toMail) {
ret[index] = element;
index++;
}
for (String element : ccMail) {
ret[index] = element;
index++;
}
for (String element : bccMail) {
ret[index] = element;
index++;
}
return ret;
}
/**
* This method will return null if there is not any email
*
* @param email String
* @return javax.mail.internet.InternetAddress[]
* @throws BadInputException
* @throws AddressException
*/
private static InternetAddress[] getInternetAddressEmails(final String email)
throws BadInputException, AddressException {
String[] mails = getEmails(email);
if (mails.length == 0) {
return null;// must return null, not empty array
}
//log.debug("to = " + mails);
InternetAddress[] address = new InternetAddress[mails.length];
for (int i = 0; i < mails.length; i++) {
address[i] = new InternetAddress(mails[i]);
//log.debug("to each element = " + mails[i]);
}
return address;
}
}