KEYCLOAK-61 Send emails

pom.xml

@@ -226,6 +226,11 @@
       			<artifactId>javase</artifactId>
       			<version>2.2</version>
 			</dependency>
+			<dependency>
+    			<groupId>com.icegreen</groupId>
+    			<artifactId>greenmail</artifactId>
+	    		<version>1.3.1b</version>
+			</dependency>  			
 			
 			<dependency>
   				<groupId>org.jboss.arquillian</groupId>

services/pom.xml

@@ -156,6 +156,11 @@
             <version>3.6.6.Final</version>
             <scope>test</scope>
         </dependency>
+		<dependency>
+    		<groupId>com.icegreen</groupId>
+    		<artifactId>greenmail</artifactId>
+            <scope>test</scope>
+		</dependency>        
     </dependencies>
     <build>
         <plugins>

services/src/main/java/org/keycloak/services/email/EmailSender.java

@@ -0,0 +1,44 @@
+package org.keycloak.services.email;
+
+import java.util.Map.Entry;
+import java.util.Properties;
+
+import javax.mail.Message;
+import javax.mail.MessagingException;
+import javax.mail.Session;
+import javax.mail.Transport;
+import javax.mail.internet.AddressException;
+import javax.mail.internet.InternetAddress;
+import javax.mail.internet.MimeMessage;
+
+public class EmailSender {
+
+    private Properties properties;
+
+    public EmailSender() {
+        properties = new Properties();
+        for (Entry<Object, Object> e : System.getProperties().entrySet()) {
+            String key = (String) e.getKey();
+            if (key.startsWith("keycloak.mail.smtp.")) {
+                key = key.replace("keycloak.mail.smtp.", "mail.smtp.");
+                properties.put(key, e.getValue());
+            }
+        }
+    }
+
+    public void send(String address, String subject, String body) throws AddressException, MessagingException {
+
+        Session session = Session.getDefaultInstance(properties);
+
+        Message msg = new MimeMessage(session);
+        msg.setFrom(new InternetAddress(properties.getProperty("mail.smtp.from")));
+        msg.setSubject(subject);
+        msg.setText(body);
+        msg.saveChanges();
+
+        Transport transport = session.getTransport("smtp");
+        transport.connect(properties.getProperty("mail.smtp.user"), properties.getProperty("mail.smtp.password"));
+        transport.sendMessage(msg, new InternetAddress[] { new InternetAddress(address) });
+    }
+
+}

services/src/test/java/org/keycloak/services/email/EmailSenderTest.java

@@ -0,0 +1,55 @@
+package org.keycloak.services.email;
+
+import java.io.IOException;
+
+import javax.mail.MessagingException;
+import javax.mail.internet.AddressException;
+import javax.mail.internet.MimeMessage;
+
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import com.icegreen.greenmail.util.GreenMail;
+import com.icegreen.greenmail.util.ServerSetup;
+
+public class EmailSenderTest {
+
+    private GreenMail greenMail;
+
+    @Before
+    public void before() {
+        ServerSetup setup = new ServerSetup(3025, "localhost", "smtp");
+
+        greenMail = new GreenMail(setup);
+        greenMail.start();
+
+        System.setProperty("keycloak.mail.smtp.from", "auto@keycloak.org");
+        System.setProperty("keycloak.mail.smtp.host", "localhost");
+        System.setProperty("keycloak.mail.smtp.port", "3025");
+    }
+
+    @After
+    public void after() throws InterruptedException {
+        if (greenMail != null) {
+            greenMail.stop();
+        }
+    }
+
+    @Test
+    public void sendMail() throws AddressException, MessagingException, IOException {
+        EmailSender emailSender = new EmailSender();
+        emailSender.send("test@test.com", "Test subject", "Test body");
+
+        MimeMessage[] receivedMessages = greenMail.getReceivedMessages();
+        Assert.assertEquals(1, receivedMessages.length);
+
+        MimeMessage msg = receivedMessages[0];
+        Assert.assertEquals(1, msg.getFrom().length);
+        Assert.assertEquals("auto@keycloak.org", msg.getFrom()[0].toString());
+        Assert.assertEquals("Test subject", msg.getSubject());
+        Assert.assertEquals("Test body", ((String) msg.getContent()).trim());
+    }
+
+}