Use Java 1.8, and its Optional.
[rhynodge.git] / src / main / java / net / pterodactylus / rhynodge / actions / EmailAction.java
1 /*
2  * Rhynodge - EmailAction.java - Copyright © 2013 David Roden
3  *
4  * This program is free software: you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation, either version 3 of the License, or
7  * (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
16  */
17
18 package net.pterodactylus.rhynodge.actions;
19
20 import static java.lang.System.getProperties;
21 import static javax.mail.Session.getInstance;
22
23 import java.util.Properties;
24
25 import javax.mail.Message.RecipientType;
26 import javax.mail.MessagingException;
27 import javax.mail.Session;
28 import javax.mail.Transport;
29 import javax.mail.URLName;
30 import javax.mail.internet.InternetAddress;
31 import javax.mail.internet.MimeBodyPart;
32 import javax.mail.internet.MimeMessage;
33 import javax.mail.internet.MimeMultipart;
34
35 import net.pterodactylus.rhynodge.Action;
36 import net.pterodactylus.rhynodge.output.Output;
37
38 import com.google.common.annotations.VisibleForTesting;
39 import com.sun.mail.smtp.SMTPTransport;
40
41 /**
42  * {@link Action} implementation that sends an email containing the triggering
43  * object to an email address.
44  *
45  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
46  */
47 public class EmailAction implements Action {
48
49         /** The email address of the sender. */
50         private final String sender;
51
52         /** The email address of the recipient. */
53         private final String recipient;
54
55         private final Transport transport;
56         private final Session session;
57
58         /**
59          * Creates a new email action.
60          *
61          * @param hostname
62          *            The hostname of the SMTP server
63          * @param sender
64          *            The email address of the sender
65          * @param recipient
66          *            The email address of the recipient
67          */
68         public EmailAction(String hostname, String sender, String recipient) {
69                 this.sender = sender;
70                 this.recipient = recipient;
71                 Properties properties = getProperties();
72                 properties.put("mail.smtp.host", hostname);
73                 session = getInstance(properties);
74                 transport = new SMTPTransport(session, new URLName("smtp", hostname, 25, null, "", ""));
75         }
76
77         @VisibleForTesting
78         EmailAction(Transport transport, String sender, String recipient) {
79                 this.transport = transport;
80                 this.sender = sender;
81                 this.recipient = recipient;
82                 this.session = getInstance(getProperties());
83         }
84
85         //
86         // ACTION METHODS
87         //
88
89         /**
90          * {@inheritDoc}
91          */
92         @Override
93         public void execute(Output output) {
94                 MimeMessage message = new MimeMessage(session);
95                 try {
96                         /* create message. */
97                         message.setFrom(new InternetAddress(sender));
98                         message.setRecipient(RecipientType.TO, new InternetAddress(recipient));
99                         message.setSubject(output.summary(), "UTF-8");
100
101                         /* create text and html parts. */
102                         MimeMultipart multipart = new MimeMultipart();
103                         multipart.setSubType("alternative");
104                         MimeBodyPart textPart = new MimeBodyPart();
105                         textPart.setContent(output.text("text/plain", -1), "text/plain;charset=utf-8");
106                         MimeBodyPart htmlPart = new MimeBodyPart();
107                         htmlPart.setContent(output.text("text/html", -1), "text/html;charset=utf-8");
108                         multipart.addBodyPart(textPart);
109                         multipart.addBodyPart(htmlPart);
110                         message.setContent(multipart);
111
112                         transport.connect();
113                         transport.sendMessage(message, message.getAllRecipients());
114                 } catch (MessagingException me1) {
115                         /* swallow. */
116                 }
117         }
118
119 }