Setup CSI again

app/src/main/java/org/mercury_im/messenger/MercuryImApplication.java

@@ -33,6 +33,9 @@ public class MercuryImApplication extends Application {
     @Inject
     AccountRepository accountRepository;
 
+    @Inject
+    Messenger messenger;
+
     public static MercuryImApplication getApplication() {
         return INSTANCE;
     }
@@ -45,12 +48,18 @@ public class MercuryImApplication extends Application {
         appComponent = createAppComponent();
         appComponent.inject(this);
 
-        registerActivityLifecycleCallbacks(clientStateHandler);
+        setupClientStateIndication();
+
         Notifications.initializeNotificationChannels(this);
 
         subscribeForegroundServiceToActiveAccounts();
     }
 
+    private void setupClientStateIndication() {
+        clientStateHandler.addClientStateListener(messenger);
+        registerActivityLifecycleCallbacks(clientStateHandler);
+    }
+
     /**
      * Create the Dependency Injection graph.
      */

domain/src/main/java/org/mercury_im/messenger/Messenger.java

@@ -1,5 +1,8 @@
 package org.mercury_im.messenger;
 
+import org.jivesoftware.smack.SmackException;
+import org.jivesoftware.smack.XMPPConnection;
+import org.jivesoftware.smackx.csi.ClientStateIndicationManager;
 import org.mercury_im.messenger.data.repository.Repositories;
 import org.mercury_im.messenger.entity.Account;
 import org.mercury_im.messenger.usecase.AddAccount;
@@ -7,12 +10,15 @@ import org.mercury_im.messenger.xmpp.MercuryConnection;
 
 import java.util.HashMap;
 import java.util.Map;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 
 import javax.inject.Inject;
 
-public class Messenger {
+public class Messenger implements ClientStateListener {
 
     public static final String TAG = "MercuryIM";
+    private static final Logger LOGGER = Logger.getLogger(Messenger.class.getName());
 
     private final Map<Long, MercuryConnection> connections = new HashMap<>();
     private Repositories repositories;
@@ -33,4 +39,38 @@ public class Messenger {
     public AddAccount addAccount() {
         return new AddAccount(repositories.getAccountRepository(), this);
     }
+
+    // CSI
+
+    @Override
+    public void onClientInForeground() {
+        LOGGER.log(Level.INFO, "CSI: active");
+        for (MercuryConnection connection : connections.values()) {
+            tryCsiActive(connection);
+        }
+    }
+
+    @Override
+    public void onClientInBackground() {
+        LOGGER.log(Level.INFO, "CSI: inactive");
+        for (MercuryConnection connection : connections.values()) {
+            tryCsiInactive(connection);
+        }
+    }
+
+    private void tryCsiActive(MercuryConnection connection) {
+        try {
+            ClientStateIndicationManager.active(connection.getConnection());
+        } catch (SmackException.NotConnectedException | InterruptedException e) {
+            LOGGER.log(Level.WARNING, "Sending CSI state 'active' failed.", e);
+        }
+    }
+
+    private void tryCsiInactive(MercuryConnection connection) {
+        try {
+            ClientStateIndicationManager.inactive(connection.getConnection());
+        } catch (SmackException.NotConnectedException | InterruptedException e) {
+            LOGGER.log(Level.WARNING, "Sending CSI state 'inactive' failed.", e);
+        }
+    }
 }