Send an email on successful user registration. Use Gmail API for that. Add password confirmation and email to RegisterUserDialog.

Mage.Server/src/main/java/mage/server/GmailClient.java

@@ -0,0 +1,86 @@
+package mage.server;
+
+import com.google.api.client.auth.oauth2.Credential;
+import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp;
+import com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver;
+import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
+import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
+import com.google.api.client.http.HttpTransport;
+import com.google.api.client.json.JsonFactory;
+import com.google.api.client.json.jackson2.JacksonFactory;
+import com.google.api.client.util.Base64;
+import com.google.api.client.util.store.FileDataStoreFactory;
+import com.google.api.services.gmail.Gmail;
+import com.google.api.services.gmail.Gmail.Builder;
+import com.google.api.services.gmail.GmailScopes;
+import com.google.api.services.gmail.model.Message;
+import java.io.ByteArrayOutputStream;
+import java.io.FileReader;
+import java.io.IOException;
+import javax.mail.Session;
+import java.security.GeneralSecurityException;
+import java.util.Collections;
+import java.util.Properties;
+import javax.mail.MessagingException;
+import javax.mail.internet.InternetAddress;
+import javax.mail.internet.MimeMessage;
+import mage.server.util.ConfigSettings;
+import org.apache.log4j.Logger;
+
+public class GmailClient {
+
+    private static final Logger logger = Logger.getLogger(Main.class);
+    private static final JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance();
+    private static final java.io.File DATA_STORE_DIR = new java.io.File(System.getProperty("user.home"), ".store/xmage");
+    private static FileDataStoreFactory dataStoreFactory;
+    private static HttpTransport httpTransport;
+    private static Credential credential;
+
+    public static boolean initilize() {
+        try {
+            dataStoreFactory = new FileDataStoreFactory(DATA_STORE_DIR);
+            httpTransport = GoogleNetHttpTransport.newTrustedTransport();
+
+            GoogleClientSecrets clientSecrets = GoogleClientSecrets.load(JSON_FACTORY, new FileReader("client_secrets.json"));
+            if (clientSecrets.getDetails().getClientId().startsWith("Enter")
+                    || clientSecrets.getDetails().getClientSecret().startsWith("Enter ")) {
+                logger.error("client_secrets.json not found");
+                return false;
+            }
+
+            GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow.Builder(
+            httpTransport, JSON_FACTORY, clientSecrets,
+            Collections.singleton(GmailScopes.GMAIL_COMPOSE)).setDataStoreFactory(
+                    dataStoreFactory).build();
+
+            credential = new AuthorizationCodeInstalledApp(flow, new LocalServerReceiver()).authorize("user");
+            return true;
+        } catch (IOException | GeneralSecurityException ex) {
+            logger.error("Error initializing GmailClient", ex);
+        }
+        return false;
+    }
+
+    public static boolean sendMessage(String email, String subject, String text) {
+        try {
+            Gmail gmail = new Builder(httpTransport, JSON_FACTORY, credential).setApplicationName("XMage Server").build();
+
+            MimeMessage mimeMessage = new MimeMessage(Session.getDefaultInstance(new Properties()));
+            mimeMessage.addRecipient(javax.mail.Message.RecipientType.TO, new InternetAddress(email));
+            mimeMessage.setSubject(subject);
+            mimeMessage.setText(text);
+
+            ByteArrayOutputStream baos = new ByteArrayOutputStream();
+            mimeMessage.writeTo(baos);
+            Message message = new Message();
+            message.setRaw(Base64.encodeBase64URLSafeString(baos.toByteArray()));
+
+            gmail.users().messages().send(ConfigSettings.getInstance().getGoogleAccount() + "@gmail.com", message).execute();
+            return true;
+        } catch (MessagingException | IOException ex) {
+            logger.error("Error sending message", ex);
+        }
+        return false;
+    }
+}

Mage.Server/src/main/java/mage/server/Main.java

@@ -107,7 +107,18 @@ public class Main {
                 fastDbMode = Boolean.valueOf(arg.replace(fastDBModeArg, ""));
             }
         }
-        
+
+        ConfigSettings config = ConfigSettings.getInstance();
+        if (config.isAuthenticationActivated()) {
+            logger.info("Initializing GmailClient. This will open up a tab in your browser to ask for an OAuth access token.");
+            if (GmailClient.initilize()) {
+                logger.info("GmailClient initilized successfully.");
+            } else {
+                logger.fatal("GmailClient initialization failed.");
+                return;
+            }
+        }
+
         logger.info("Loading cards...");
         if (fastDbMode) {
             CardScanner.scanned = true;
@@ -117,7 +128,6 @@ public class Main {
         logger.info("Done.");
 
         deleteSavedGames();
-        ConfigSettings config = ConfigSettings.getInstance();
         for (GamePlugin plugin: config.getGameTypes()) {
             GameFactory.getInstance().addGameType(plugin.getName(), loadGameType(plugin), loadPlugin(plugin));
         }

Mage.Server/src/main/java/mage/server/Session.java

@@ -87,6 +87,12 @@ public class Session {
                 return returnMessage;
             }
             AuthorizedUserRepository.instance.add(userName, password, email);
+            if (GmailClient.sendMessage(email, "XMage Registration Completed",
+                    "You are successfully registered as " + userName + ".")) {
+                logger.info("Sent a registration confirmation email to " + email + " for " + userName);
+            } else {
+                logger.error("Failed sending a registration confirmation email to " + email + " for " + userName);
+            }
             return null;
         }
     }

Mage.Server/src/main/java/mage/server/util/ConfigSettings.java

@@ -94,7 +94,7 @@ public class ConfigSettings {
     public int getBacklogSize() {
         return config.getServer().getBacklogSize().intValue();
     }
-        
+
     public int getMaxGameThreads() {
         return config.getServer().getMaxGameThreads().intValue();
     }
@@ -114,14 +114,22 @@ public class ConfigSettings {
     public String getUserNamePattern() {
         return config.getServer().getUserNamePattern();
     }
-    
+
     public String getMaxAiOpponents() {
         return config.getServer().getMaxAiOpponents();
     }
 
     public Boolean isSaveGameActivated() {
-            return config.getServer().isSaveGameActivated();
-}
+        return config.getServer().isSaveGameActivated();
+    }
+
+    public Boolean isAuthenticationActivated() {
+        return config.getServer().isAuthenticationActivated();
+    }
+
+    public String getGoogleAccount() {
+        return config.getServer().getGoogleAccount();
+    }
 
     public List<Plugin> getPlayerTypes() {
         return config.getPlayerTypes().getPlayerType();