Split commands into separate classes

src/main/java/org/asamk/signal/commands/DaemonCommand.java

@@ -0,0 +1,76 @@
+package org.asamk.signal.commands;
+
+import net.sourceforge.argparse4j.impl.Arguments;
+import net.sourceforge.argparse4j.inf.Namespace;
+import net.sourceforge.argparse4j.inf.Subparser;
+import org.asamk.signal.DbusReceiveMessageHandler;
+import org.asamk.signal.JsonDbusReceiveMessageHandler;
+import org.asamk.signal.manager.Manager;
+import org.freedesktop.dbus.DBusConnection;
+import org.freedesktop.dbus.exceptions.DBusException;
+
+import java.io.IOException;
+import java.util.concurrent.TimeUnit;
+
+import static org.asamk.signal.DbusConfig.SIGNAL_BUSNAME;
+import static org.asamk.signal.DbusConfig.SIGNAL_OBJECTPATH;
+import static org.asamk.signal.util.ErrorUtils.handleAssertionError;
+
+public class DaemonCommand implements LocalCommand {
+
+    @Override
+    public void attachToSubparser(final Subparser subparser) {
+        subparser.addArgument("--system")
+                .action(Arguments.storeTrue())
+                .help("Use DBus system bus instead of user bus.");
+        subparser.addArgument("--ignore-attachments")
+                .help("Don’t download attachments of received messages.")
+                .action(Arguments.storeTrue());
+        subparser.addArgument("--json")
+                .help("Output received messages in json format, one json object per line.")
+                .action(Arguments.storeTrue());
+    }
+
+    @Override
+    public int handleCommand(final Namespace ns, final Manager m) {
+        if (!m.isRegistered()) {
+            System.err.println("User is not registered.");
+            return 1;
+        }
+        DBusConnection conn = null;
+        try {
+            try {
+                int busType;
+                if (ns.getBoolean("system")) {
+                    busType = DBusConnection.SYSTEM;
+                } else {
+                    busType = DBusConnection.SESSION;
+                }
+                conn = DBusConnection.getConnection(busType);
+                conn.exportObject(SIGNAL_OBJECTPATH, m);
+                conn.requestBusName(SIGNAL_BUSNAME);
+            } catch (UnsatisfiedLinkError e) {
+                System.err.println("Missing native library dependency for dbus service: " + e.getMessage());
+                return 1;
+            } catch (DBusException e) {
+                e.printStackTrace();
+                return 2;
+            }
+            boolean ignoreAttachments = ns.getBoolean("ignore_attachments");
+            try {
+                m.receiveMessages(1, TimeUnit.HOURS, false, ignoreAttachments, ns.getBoolean("json") ? new JsonDbusReceiveMessageHandler(m, conn, SIGNAL_OBJECTPATH) : new DbusReceiveMessageHandler(m, conn, SIGNAL_OBJECTPATH));
+                return 0;
+            } catch (IOException e) {
+                System.err.println("Error while receiving messages: " + e.getMessage());
+                return 3;
+            } catch (AssertionError e) {
+                handleAssertionError(e);
+                return 1;
+            }
+        } finally {
+            if (conn != null) {
+                conn.disconnect();
+            }
+        }
+    }
+}