Separate DbusSignal implementation from Manager

[signal-cli] / src / main / java / org / asamk / signal / Main.java

diff --git a/src/main/java/org/asamk/signal/Main.java b/src/main/java/org/asamk/signal/Main.java
index d562c4e1ad11279419a8efc1a40957a740ae383c..562267c488ae3effcccaf5525172caac9f899406 100644 (file)
--- a/src/main/java/org/asamk/signal/Main.java
+++ b/src/main/java/org/asamk/signal/Main.java
@@ -1,375 +1,232 @@
-/**
- * Copyright (C) 2015 AsamK
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+/*
+  Copyright (C) 2015-2020 AsamK and contributors
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.

  */
 package org.asamk.signal;
 
 import net.sourceforge.argparse4j.ArgumentParsers;
 import net.sourceforge.argparse4j.impl.Arguments;
  */
 package org.asamk.signal;
 
 import net.sourceforge.argparse4j.ArgumentParsers;
 import net.sourceforge.argparse4j.impl.Arguments;

-import net.sourceforge.argparse4j.inf.*;
-import org.apache.commons.io.IOUtils;
-import org.apache.http.util.TextUtils;
+import net.sourceforge.argparse4j.inf.ArgumentParser;
+import net.sourceforge.argparse4j.inf.ArgumentParserException;
+import net.sourceforge.argparse4j.inf.MutuallyExclusiveGroup;
+import net.sourceforge.argparse4j.inf.Namespace;
+import net.sourceforge.argparse4j.inf.Subparser;
+import net.sourceforge.argparse4j.inf.Subparsers;
+

 import org.asamk.Signal;
 import org.asamk.Signal;

-import org.freedesktop.dbus.DBusConnection;
+import org.asamk.signal.commands.Command;
+import org.asamk.signal.commands.Commands;
+import org.asamk.signal.commands.DbusCommand;
+import org.asamk.signal.commands.ExtendedDbusCommand;
+import org.asamk.signal.commands.LocalCommand;
+import org.asamk.signal.commands.ProvisioningCommand;
+import org.asamk.signal.dbus.DbusSignalImpl;
+import org.asamk.signal.manager.Manager;
+import org.asamk.signal.manager.ProvisioningManager;
+import org.asamk.signal.manager.ServiceConfig;
+import org.asamk.signal.util.IOUtils;
+import org.asamk.signal.util.SecurityProvider;
+import org.bouncycastle.jce.provider.BouncyCastleProvider;
+import org.freedesktop.dbus.connections.impl.DBusConnection;

 import org.freedesktop.dbus.exceptions.DBusException;
 import org.freedesktop.dbus.exceptions.DBusException;

-import org.freedesktop.dbus.exceptions.DBusExecutionException;
-import org.whispersystems.signalservice.api.crypto.UntrustedIdentityException;
-import org.whispersystems.signalservice.api.messages.*;
-import org.whispersystems.signalservice.api.messages.multidevice.SignalServiceSyncMessage;
-import org.whispersystems.signalservice.api.push.SignalServiceAddress;
-import org.whispersystems.signalservice.api.push.exceptions.EncapsulatedExceptions;
-import org.whispersystems.signalservice.api.push.exceptions.NetworkFailureException;
-import org.whispersystems.signalservice.api.push.exceptions.UnregisteredUserException;
+import org.whispersystems.signalservice.api.push.exceptions.AuthorizationFailedException;

 import org.whispersystems.signalservice.api.util.PhoneNumberFormatter;
 
 import java.io.File;
 import java.io.IOException;
 import java.security.Security;
 import org.whispersystems.signalservice.api.util.PhoneNumberFormatter;
 
 import java.io.File;
 import java.io.IOException;
 import java.security.Security;

-import java.util.ArrayList;
-import java.util.List;
+import java.util.Map;

 
 

-public class Main {
+import static org.whispersystems.signalservice.internal.util.Util.isEmpty;

 
 

-    public static final String SIGNAL_BUSNAME = "org.asamk.Signal";
-    public static final String SIGNAL_OBJECTPATH = "/org/asamk/Signal";
+public class Main {

 
     public static void main(String[] args) {
 
     public static void main(String[] args) {

-        // Workaround for BKS truststore
-        Security.insertProviderAt(new org.spongycastle.jce.provider.BouncyCastleProvider(), 1);
+        installSecurityProviderWorkaround();

 
         Namespace ns = parseArgs(args);
         if (ns == null) {
             System.exit(1);
         }
 
 
         Namespace ns = parseArgs(args);
         if (ns == null) {
             System.exit(1);
         }
 

+        int res = handleCommands(ns);
+        System.exit(res);
+    }
+
+    public static void installSecurityProviderWorkaround() {
+        // Register our own security provider
+        Security.insertProviderAt(new SecurityProvider(), 1);
+        Security.addProvider(new BouncyCastleProvider());
+    }
+
+    private static int handleCommands(Namespace ns) {

         final String username = ns.getString("username");
         final String username = ns.getString("username");

-        Manager m;
-        Signal ts;
-        DBusConnection dBusConn = null;
-        try {
-            if (ns.getBoolean("dbus") || ns.getBoolean("dbus_system")) {
-                try {
-                    m = null;
-                    int busType;
-                    if (ns.getBoolean("dbus_system")) {
-                        busType = DBusConnection.SYSTEM;
-                    } else {
-                        busType = DBusConnection.SESSION;
-                    }
-                    dBusConn = DBusConnection.getConnection(busType);
-                    ts = (Signal) dBusConn.getRemoteObject(
-                            SIGNAL_BUSNAME, SIGNAL_OBJECTPATH,
-                            Signal.class);
-                } catch (DBusException e) {
-                    e.printStackTrace();
-                    if (dBusConn != null) {
-                        dBusConn.disconnect();
-                    }
-                    System.exit(3);
-                    return;
-                }
-            } else {
-                String settingsPath = ns.getString("config");
-                if (TextUtils.isEmpty(settingsPath)) {
-                    settingsPath = System.getProperty("user.home") + "/.config/signal";
-                    if (!new File(settingsPath).exists()) {
-                        String legacySettingsPath = System.getProperty("user.home") + "/.config/textsecure";
-                        if (new File(legacySettingsPath).exists()) {
-                            settingsPath = legacySettingsPath;
-                        }
-                    }
+
+        if (ns.getBoolean("dbus") || ns.getBoolean("dbus_system")) {
+            try {
+                DBusConnection.DBusBusType busType;
+                if (ns.getBoolean("dbus_system")) {
+                    busType = DBusConnection.DBusBusType.SYSTEM;
+                } else {
+                    busType = DBusConnection.DBusBusType.SESSION;

                 }
                 }

+                try (DBusConnection dBusConn = DBusConnection.getConnection(busType)) {
+                    Signal ts = dBusConn.getRemoteObject(
+                            DbusConfig.SIGNAL_BUSNAME, DbusConfig.SIGNAL_OBJECTPATH,
+                            Signal.class);

 
 

-                m = new Manager(username, settingsPath);
-                ts = m;
-                if (m.userExists()) {
-                    try {
-                        m.load();
-                    } catch (Exception e) {
-                        System.err.println("Error loading state file \"" + m.getFileName() + "\": " + e.getMessage());
-                        System.exit(2);
-                        return;
-                    }
+                    return handleCommands(ns, ts, dBusConn);

                 }
                 }

+            } catch (UnsatisfiedLinkError e) {
+                System.err.println("Missing native library dependency for dbus service: " + e.getMessage());
+                return 1;
+            } catch (DBusException | IOException e) {
+                e.printStackTrace();
+                return 3;
+            }
+        } else {
+            String dataPath = ns.getString("config");
+            if (isEmpty(dataPath)) {
+                dataPath = getDefaultDataPath();

             }
 
             }
 

-            switch (ns.getString("command")) {
-                case "register":
-                    if (dBusConn != null) {
-                        System.err.println("register is not yet implementd via dbus");
-                        System.exit(1);
-                    }
-                    if (!m.userHasKeys()) {
-                        m.createNewIdentity();
-                    }
-                    try {
-                        m.register(ns.getBoolean("voice"));
-                    } catch (IOException e) {
-                        System.err.println("Request verify error: " + e.getMessage());
-                        System.exit(3);
-                    }
-                    break;
-                case "verify":
-                    if (dBusConn != null) {
-                        System.err.println("verify is not yet implementd via dbus");
-                        System.exit(1);
-                    }
-                    if (!m.userHasKeys()) {
-                        System.err.println("User has no keys, first call register.");
-                        System.exit(1);
-                    }
-                    if (m.isRegistered()) {
-                        System.err.println("User registration is already verified");
-                        System.exit(1);
-                    }
-                    try {
-                        m.verifyAccount(ns.getString("verificationCode"));
-                    } catch (IOException e) {
-                        System.err.println("Verify error: " + e.getMessage());
-                        System.exit(3);
-                    }
-                    break;
-                case "send":
-                    if (dBusConn == null && !m.isRegistered()) {
-                        System.err.println("User is not registered.");
-                        System.exit(1);
-                    }
+            if (username == null) {
+                ProvisioningManager pm = new ProvisioningManager(dataPath, ServiceConfig.createDefaultServiceConfiguration(BaseConfig.USER_AGENT), BaseConfig.USER_AGENT);
+                return handleCommands(ns, pm);
+            }

 
 

-                    if (ns.getBoolean("endsession")) {
-                        if (ns.getList("recipient") == null) {
-                            System.err.println("No recipients given");
-                            System.err.println("Aborting sending.");
-                            System.exit(1);
-                        }
-                        try {
-                            ts.sendEndSessionMessage(ns.<String>getList("recipient"));
-                        } catch (IOException e) {
-                            handleIOException(e);
-                        } catch (EncapsulatedExceptions e) {
-                            handleEncapsulatedExceptions(e);
-                        } catch (AssertionError e) {
-                            handleAssertionError(e);
-                        } catch (DBusExecutionException e) {
-                            handleDBusExecutionException(e);
-                        }
-                    } else {
-                        String messageText = ns.getString("message");
-                        if (messageText == null) {
-                            try {
-                                messageText = IOUtils.toString(System.in);
-                            } catch (IOException e) {
-                                System.err.println("Failed to read message from stdin: " + e.getMessage());
-                                System.err.println("Aborting sending.");
-                                System.exit(1);
-                            }
-                        }
-
-                        try {
-                            List<String> attachments = ns.getList("attachment");
-                            if (attachments == null) {
-                                attachments = new ArrayList<>();
-                            }
-                            if (ns.getString("group") != null) {
-                                byte[] groupId = decodeGroupId(ns.getString("group"));
-                                ts.sendGroupMessage(messageText, attachments, groupId);
-                            } else {
-                                ts.sendMessage(messageText, attachments, ns.<String>getList("recipient"));
-                            }
-                        } catch (IOException e) {
-                            handleIOException(e);
-                        } catch (EncapsulatedExceptions e) {
-                            handleEncapsulatedExceptions(e);
-                        } catch (AssertionError e) {
-                            handleAssertionError(e);
-                        } catch (GroupNotFoundException e) {
-                            handleGroupNotFoundException(e);
-                        } catch (AttachmentInvalidException e) {
-                            System.err.println("Failed to add attachment: " + e.getMessage());
-                            System.err.println("Aborting sending.");
-                            System.exit(1);
-                        } catch (DBusExecutionException e) {
-                            handleDBusExecutionException(e);
-                        }
-                    }
+            Manager manager;
+            try {
+                manager = Manager.init(username, dataPath, ServiceConfig.createDefaultServiceConfiguration(BaseConfig.USER_AGENT), BaseConfig.USER_AGENT);
+            } catch (Throwable e) {
+                System.err.println("Error loading state file: " + e.getMessage());
+                return 2;
+            }

 
 

-                    break;
-                case "receive":
-                    if (dBusConn != null) {
-                        System.err.println("receive is not yet implementd via dbus");
-                        System.exit(1);
-                    }
-                    if (!m.isRegistered()) {
-                        System.err.println("User is not registered.");
-                        System.exit(1);
-                    }
-                    int timeout = 5;
-                    if (ns.getInt("timeout") != null) {
-                        timeout = ns.getInt("timeout");
-                    }
-                    boolean returnOnTimeout = true;
-                    if (timeout < 0) {
-                        returnOnTimeout = false;
-                        timeout = 3600;
-                    }
-                    try {
-                        m.receiveMessages(timeout, returnOnTimeout, new ReceiveMessageHandler(m));
-                    } catch (IOException e) {
-                        System.err.println("Error while receiving messages: " + e.getMessage());
-                        System.exit(3);
-                    } catch (AssertionError e) {
-                        handleAssertionError(e);
-                    }
-                    break;
-                case "quitGroup":
-                    if (dBusConn != null) {
-                        System.err.println("quitGroup is not yet implementd via dbus");
-                        System.exit(1);
-                    }
-                    if (!m.isRegistered()) {
-                        System.err.println("User is not registered.");
-                        System.exit(1);
+            try (Manager m = manager) {
+                try {
+                    m.checkAccountState();
+                } catch (AuthorizationFailedException e) {
+                    if (!"register".equals(ns.getString("command"))) {
+                        // Register command should still be possible, if current authorization fails
+                        System.err.println("Authorization failed, was the number registered elsewhere?");
+                        return 2;

                     }
                     }

+                } catch (IOException e) {
+                    System.err.println("Error while checking account: " + e.getMessage());
+                    return 2;
+                }

 
 

-                    try {
-                        m.sendQuitGroupMessage(decodeGroupId(ns.getString("group")));
-                    } catch (IOException e) {
-                        handleIOException(e);
-                    } catch (EncapsulatedExceptions e) {
-                        handleEncapsulatedExceptions(e);
-                    } catch (AssertionError e) {
-                        handleAssertionError(e);
-                    } catch (GroupNotFoundException e) {
-                        handleGroupNotFoundException(e);
-                    }
+                return handleCommands(ns, m);
+            } catch (IOException e) {
+                e.printStackTrace();
+                return 3;
+            }
+        }
+    }

 
 

-                    break;
-                case "updateGroup":
-                    if (dBusConn != null) {
-                        System.err.println("updateGroup is not yet implementd via dbus");
-                        System.exit(1);
-                    }
-                    if (!m.isRegistered()) {
-                        System.err.println("User is not registered.");
-                        System.exit(1);
-                    }
+    private static int handleCommands(Namespace ns, Signal ts, DBusConnection dBusConn) {
+        String commandKey = ns.getString("command");
+        final Map<String, Command> commands = Commands.getCommands();
+        if (commands.containsKey(commandKey)) {
+            Command command = commands.get(commandKey);

 
 

-                    try {
-                        byte[] groupId = null;
-                        if (ns.getString("group") != null) {
-                            groupId = decodeGroupId(ns.getString("group"));
-                        }
-                        byte[] newGroupId = m.sendUpdateGroupMessage(groupId, ns.getString("name"), ns.<String>getList("member"), ns.getString("avatar"));
-                        if (groupId == null) {
-                            System.out.println("Creating new group \"" + Base64.encodeBytes(newGroupId) + "\" …");
-                        }
-                    } catch (IOException e) {
-                        handleIOException(e);
-                    } catch (AttachmentInvalidException e) {
-                        System.err.println("Failed to add avatar attachment for group\": " + e.getMessage());
-                        System.err.println("Aborting sending.");
-                        System.exit(1);
-                    } catch (GroupNotFoundException e) {
-                        handleGroupNotFoundException(e);
-                    } catch (EncapsulatedExceptions e) {
-                        handleEncapsulatedExceptions(e);
-                    }
+            if (command instanceof ExtendedDbusCommand) {
+                return ((ExtendedDbusCommand) command).handleCommand(ns, ts, dBusConn);
+            } else if (command instanceof DbusCommand) {
+                return ((DbusCommand) command).handleCommand(ns, ts);
+            } else {
+                System.err.println(commandKey + " is not yet implemented via dbus");
+                return 1;
+            }
+        }
+        return 0;
+    }

 
 

-                    break;
-                case "daemon":
-                    if (dBusConn != null) {
-                        System.err.println("Stop it.");
-                        System.exit(1);
-                    }
-                    if (!m.isRegistered()) {
-                        System.err.println("User is not registered.");
-                        System.exit(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 (DBusException e) {
-                            e.printStackTrace();
-                            System.exit(3);
-                        }
-                        try {
-                            m.receiveMessages(3600, false, new DbusReceiveMessageHandler(m, conn));
-                        } catch (IOException e) {
-                            System.err.println("Error while receiving messages: " + e.getMessage());
-                            System.exit(3);
-                        } catch (AssertionError e) {
-                            handleAssertionError(e);
-                        }
-                    } finally {
-                        if (conn != null) {
-                            conn.disconnect();
-                        }
-                    }
+    private static int handleCommands(Namespace ns, ProvisioningManager pm) {
+        String commandKey = ns.getString("command");
+        final Map<String, Command> commands = Commands.getCommands();
+        if (commands.containsKey(commandKey)) {
+            Command command = commands.get(commandKey);

 
 

-                    break;
-            }
-            System.exit(0);
-        } finally {
-            if (dBusConn != null) {
-                dBusConn.disconnect();
+            if (command instanceof ProvisioningCommand) {
+                return ((ProvisioningCommand) command).handleCommand(ns, pm);
+            } else {
+                System.err.println(commandKey + " only works with a username");
+                return 1;

             }
         }
             }
         }

+        return 0;

     }
 
     }
 

-    private static void handleGroupNotFoundException(GroupNotFoundException e) {
-        System.err.println("Failed to send to group: " + e.getMessage());
-        System.err.println("Aborting sending.");
-        System.exit(1);
+    private static int handleCommands(Namespace ns, Manager m) {
+        String commandKey = ns.getString("command");
+        final Map<String, Command> commands = Commands.getCommands();
+        if (commands.containsKey(commandKey)) {
+            Command command = commands.get(commandKey);
+
+            if (command instanceof LocalCommand) {
+                return ((LocalCommand) command).handleCommand(ns, m);
+            } else if (command instanceof DbusCommand) {
+                return ((DbusCommand) command).handleCommand(ns, new DbusSignalImpl(m));
+            } else if (command instanceof ExtendedDbusCommand) {
+                System.err.println(commandKey + " only works via dbus");
+            }
+            return 1;
+        }
+        return 0;

     }
 
     }
 

-    private static void handleDBusExecutionException(DBusExecutionException e) {
-        System.err.println("Cannot connect to dbus: " + e.getMessage());
-        System.err.println("Aborting.");
-        System.exit(1);
-    }
+    /**
+     * Uses $XDG_DATA_HOME/signal-cli if it exists, or if none of the legacy directories exist:
+     * - $HOME/.config/signal
+     * - $HOME/.config/textsecure
+     *
+     * @return the data directory to be used by signal-cli.
+     */
+    private static String getDefaultDataPath() {
+        String dataPath = IOUtils.getDataHomeDir() + "/signal-cli";
+        if (new File(dataPath).exists()) {
+            return dataPath;
+        }

 
 

-    private static byte[] decodeGroupId(String groupId) {
-        try {
-            return Base64.decode(groupId);
-        } catch (IOException e) {
-            System.err.println("Failed to decode groupId (must be base64) \"" + groupId + "\": " + e.getMessage());
-            System.err.println("Aborting sending.");
-            System.exit(1);
-            return null;
+        String legacySettingsPath = System.getProperty("user.home") + "/.config/signal";
+        if (new File(legacySettingsPath).exists()) {
+            return legacySettingsPath;
+        }
+
+        legacySettingsPath = System.getProperty("user.home") + "/.config/textsecure";
+        if (new File(legacySettingsPath).exists()) {
+            return legacySettingsPath;

         }
         }

+
+        return dataPath;

     }
 
     private static Namespace parseArgs(String[] args) {
     }
 
     private static Namespace parseArgs(String[] args) {

-        ArgumentParser parser = ArgumentParsers.newArgumentParser("signal-cli")
+        ArgumentParser parser = ArgumentParsers.newFor("signal-cli")
+                .build()

                 .defaultHelp(true)
                 .description("Commandline interface for Signal.")
                 .defaultHelp(true)
                 .description("Commandline interface for Signal.")

-                .version(Manager.PROJECT_NAME + " " + Manager.PROJECT_VERSION);
+                .version(BaseConfig.PROJECT_NAME + " " + BaseConfig.PROJECT_VERSION);

 
         parser.addArgument("-v", "--version")
                 .help("Show package version.")
                 .action(Arguments.version());
         parser.addArgument("--config")
 
         parser.addArgument("-v", "--version")
                 .help("Show package version.")
                 .action(Arguments.version());
         parser.addArgument("--config")

-                .help("Set the path, where to store the config (Default: $HOME/.config/signal-cli).");
+                .help("Set the path, where to store the config (Default: $XDG_DATA_HOME/signal-cli , $HOME/.local/share/signal-cli).");

 
         MutuallyExclusiveGroup mut = parser.addMutuallyExclusiveGroup();
         mut.addArgument("-u", "--username")
 
         MutuallyExclusiveGroup mut = parser.addMutuallyExclusiveGroup();
         mut.addArgument("-u", "--username")


@@ -387,245 +244,41 @@ public class Main {
                 .description("valid subcommands")
                 .help("additional help");
 
                 .description("valid subcommands")
                 .help("additional help");
 

-        Subparser parserRegister = subparsers.addParser("register");
-        parserRegister.addArgument("-v", "--voice")
-                .help("The verification should be done over voice, not sms.")
-                .action(Arguments.storeTrue());
-
-        Subparser parserVerify = subparsers.addParser("verify");
-        parserVerify.addArgument("verificationCode")
-                .help("The verification code you received via sms or voice call.");
-
-        Subparser parserSend = subparsers.addParser("send");
-        parserSend.addArgument("-g", "--group")
-                .help("Specify the recipient group ID.");
-        parserSend.addArgument("recipient")
-                .help("Specify the recipients' phone number.")
-                .nargs("*");
-        parserSend.addArgument("-m", "--message")
-                .help("Specify the message, if missing standard input is used.");
-        parserSend.addArgument("-a", "--attachment")
-                .nargs("*")
-                .help("Add file as attachment");
-        parserSend.addArgument("-e", "--endsession")
-                .help("Clear session state and send end session message.")
-                .action(Arguments.storeTrue());
-
-        Subparser parserLeaveGroup = subparsers.addParser("quitGroup");
-        parserLeaveGroup.addArgument("-g", "--group")
-                .required(true)
-                .help("Specify the recipient group ID.");
-
-        Subparser parserUpdateGroup = subparsers.addParser("updateGroup");
-        parserUpdateGroup.addArgument("-g", "--group")
-                .help("Specify the recipient group ID.");
-        parserUpdateGroup.addArgument("-n", "--name")
-                .help("Specify the new group name.");
-        parserUpdateGroup.addArgument("-a", "--avatar")
-                .help("Specify a new group avatar image file");
-        parserUpdateGroup.addArgument("-m", "--member")
-                .nargs("*")
-                .help("Specify one or more members to add to the group");
-
-        Subparser parserReceive = subparsers.addParser("receive");
-        parserReceive.addArgument("-t", "--timeout")
-                .type(int.class)
-                .help("Number of seconds to wait for new messages (negative values disable timeout)");
-
-        Subparser parserDaemon = subparsers.addParser("daemon");
-        parserDaemon.addArgument("--system")
-                .action(Arguments.storeTrue())
-                .help("Use DBus system bus instead of user bus.");
+        final Map<String, Command> commands = Commands.getCommands();
+        for (Map.Entry<String, Command> entry : commands.entrySet()) {
+            Subparser subparser = subparsers.addParser(entry.getKey());
+            entry.getValue().attachToSubparser(subparser);
+        }

 
 

+        Namespace ns;

         try {
         try {

-            Namespace ns = parser.parseArgs(args);
-            if (!ns.getBoolean("dbus") && !ns.getBoolean("dbus_system")) {
-                if (ns.getString("username") == null) {
-                    parser.printUsage();
-                    System.err.println("You need to specify a username (phone number)");
-                    System.exit(2);
-                }
-                if (!PhoneNumberFormatter.isValidNumber(ns.getString("username"))) {
-                    System.err.println("Invalid username (phone number), make sure you include the country code.");
-                    System.exit(2);
-                }
-            }
-            if (ns.getList("recipient") != null && !ns.getList("recipient").isEmpty() && ns.getString("group") != null) {
-                System.err.println("You cannot specify recipients by phone number and groups a the same time");
-                System.exit(2);
-            }
-            return ns;
+            ns = parser.parseArgs(args);

         } catch (ArgumentParserException e) {
             parser.handleError(e);
             return null;
         }
         } catch (ArgumentParserException e) {
             parser.handleError(e);
             return null;
         }

-    }
-
-    private static void handleAssertionError(AssertionError e) {
-        System.err.println("Failed to send/receive message (Assertion): " + e.getMessage());
-        e.printStackTrace();
-        System.err.println("If you use an Oracle JRE please check if you have unlimited strength crypto enabled, see README");
-        System.exit(1);
-    }
-
-    private static void handleEncapsulatedExceptions(EncapsulatedExceptions e) {
-        System.err.println("Failed to send (some) messages:");
-        for (NetworkFailureException n : e.getNetworkExceptions()) {
-            System.err.println("Network failure for \"" + n.getE164number() + "\": " + n.getMessage());
-        }
-        for (UnregisteredUserException n : e.getUnregisteredUserExceptions()) {
-            System.err.println("Unregistered user \"" + n.getE164Number() + "\": " + n.getMessage());
-        }
-        for (UntrustedIdentityException n : e.getUntrustedIdentityExceptions()) {
-            System.err.println("Untrusted Identity for \"" + n.getE164Number() + "\": " + n.getMessage());
-        }
-    }
-
-    private static void handleIOException(IOException e) {
-        System.err.println("Failed to send message: " + e.getMessage());
-    }
-
-    private static class ReceiveMessageHandler implements Manager.ReceiveMessageHandler {
-        final Manager m;
-
-        public ReceiveMessageHandler(Manager m) {
-            this.m = m;
-        }
-
-        @Override
-        public void handleMessage(SignalServiceEnvelope envelope, SignalServiceContent content, GroupInfo group) {
-            SignalServiceAddress source = envelope.getSourceAddress();
-            System.out.println(String.format("Envelope from: %s (device: %d)", source.getNumber(), envelope.getSourceDevice()));
-            if (source.getRelay().isPresent()) {
-                System.out.println("Relayed by: " + source.getRelay().get());
-            }
-            System.out.println("Timestamp: " + envelope.getTimestamp());

 
 

-            if (envelope.isReceipt()) {
-                System.out.println("Got receipt.");
-            } else if (envelope.isSignalMessage() | envelope.isPreKeySignalMessage()) {
-                if (content == null) {
-                    System.out.println("Failed to decrypt message.");
-                } else {
-                    if (content.getDataMessage().isPresent()) {
-                        SignalServiceDataMessage message = content.getDataMessage().get();
-
-                        System.out.println("Message timestamp: " + message.getTimestamp());
-
-                        if (message.getBody().isPresent()) {
-                            System.out.println("Body: " + message.getBody().get());
-                        }
-                        if (message.getGroupInfo().isPresent()) {
-                            SignalServiceGroup groupInfo = message.getGroupInfo().get();
-                            System.out.println("Group info:");
-                            System.out.println("  Id: " + Base64.encodeBytes(groupInfo.getGroupId()));
-                            if (groupInfo.getName().isPresent()) {
-                                System.out.println("  Name: " + groupInfo.getName().get());
-                            } else if (group != null) {
-                                System.out.println("  Name: " + group.name);
-                            } else {
-                                System.out.println("  Name: <Unknown group>");
-                            }
-                            System.out.println("  Type: " + groupInfo.getType());
-                            if (groupInfo.getMembers().isPresent()) {
-                                for (String member : groupInfo.getMembers().get()) {
-                                    System.out.println("  Member: " + member);
-                                }
-                            }
-                            if (groupInfo.getAvatar().isPresent()) {
-                                System.out.println("  Avatar:");
-                                printAttachment(groupInfo.getAvatar().get());
-                            }
-                        }
-                        if (message.isEndSession()) {
-                            System.out.println("Is end session");
-                        }
-
-                        if (message.getAttachments().isPresent()) {
-                            System.out.println("Attachments: ");
-                            for (SignalServiceAttachment attachment : message.getAttachments().get()) {
-                                printAttachment(attachment);
-                            }
-                        }
-                    }
-                    if (content.getSyncMessage().isPresent()) {
-                        SignalServiceSyncMessage syncMessage = content.getSyncMessage().get();
-                        System.out.println("Received sync message");
-                    }
-                }
-            } else {
-                System.out.println("Unknown message received.");
+        if ("link".equals(ns.getString("command"))) {
+            if (ns.getString("username") != null) {
+                parser.printUsage();
+                System.err.println("You cannot specify a username (phone number) when linking");
+                System.exit(2);

             }
             }

-            System.out.println();
-        }
-
-        private void printAttachment(SignalServiceAttachment attachment) {
-            System.out.println("- " + attachment.getContentType() + " (" + (attachment.isPointer() ? "Pointer" : "") + (attachment.isStream() ? "Stream" : "") + ")");
-            if (attachment.isPointer()) {
-                final SignalServiceAttachmentPointer pointer = attachment.asPointer();
-                System.out.println("  Id: " + pointer.getId() + " Key length: " + pointer.getKey().length + (pointer.getRelay().isPresent() ? " Relay: " + pointer.getRelay().get() : ""));
-                System.out.println("  Size: " + (pointer.getSize().isPresent() ? pointer.getSize().get() + " bytes" : "<unavailable>") + (pointer.getPreview().isPresent() ? " (Preview is available: " + pointer.getPreview().get().length + " bytes)" : ""));
-                File file = m.getAttachmentFile(pointer.getId());
-                if (file.exists()) {
-                    System.out.println("  Stored plaintext in: " + file);
-                }
+        } else if (!ns.getBoolean("dbus") && !ns.getBoolean("dbus_system")) {
+            if (ns.getString("username") == null) {
+                parser.printUsage();
+                System.err.println("You need to specify a username (phone number)");
+                System.exit(2);

             }
             }

-        }
-    }
-
-    private static class DbusReceiveMessageHandler extends ReceiveMessageHandler {
-        final DBusConnection conn;
-
-        public DbusReceiveMessageHandler(Manager m, DBusConnection conn) {
-            super(m);
-            this.conn = conn;
-        }
-
-        @Override
-        public void handleMessage(SignalServiceEnvelope envelope, SignalServiceContent content, GroupInfo group) {
-            super.handleMessage(envelope, content, group);
-
-            if (!envelope.isReceipt() && content != null && content.getDataMessage().isPresent()) {
-                SignalServiceDataMessage message = content.getDataMessage().get();
-
-                if (!message.isEndSession() &&
-                        !(message.getGroupInfo().isPresent() &&
-                                message.getGroupInfo().get().getType() != SignalServiceGroup.Type.DELIVER)) {
-                    List<String> attachments = new ArrayList<>();
-                    if (message.getAttachments().isPresent()) {
-                        for (SignalServiceAttachment attachment : message.getAttachments().get()) {
-                            if (attachment.isPointer()) {
-                                attachments.add(m.getAttachmentFile(attachment.asPointer().getId()).getAbsolutePath());
-                            }
-                        }
-                    }
-
-                    try {
-                        conn.sendSignal(new Signal.MessageReceived(
-                                SIGNAL_OBJECTPATH,
-                                message.getTimestamp(),
-                                envelope.getSource(),
-                                message.getGroupInfo().isPresent() ? message.getGroupInfo().get().getGroupId() : new byte[0],
-                                message.getBody().isPresent() ? message.getBody().get() : "",
-                                attachments));
-                    } catch (DBusException e) {
-                        e.printStackTrace();
-                    }
-                }
+            if (!PhoneNumberFormatter.isValidNumber(ns.getString("username"), null)) {
+                System.err.println("Invalid username (phone number), make sure you include the country code.");
+                System.exit(2);

             }
         }
             }
         }

-
-        private void printAttachment(SignalServiceAttachment attachment) {
-            System.out.println("- " + attachment.getContentType() + " (" + (attachment.isPointer() ? "Pointer" : "") + (attachment.isStream() ? "Stream" : "") + ")");
-            if (attachment.isPointer()) {
-                final SignalServiceAttachmentPointer pointer = attachment.asPointer();
-                System.out.println("  Id: " + pointer.getId() + " Key length: " + pointer.getKey().length + (pointer.getRelay().isPresent() ? " Relay: " + pointer.getRelay().get() : ""));
-                System.out.println("  Size: " + (pointer.getSize().isPresent() ? pointer.getSize().get() + " bytes" : "<unavailable>") + (pointer.getPreview().isPresent() ? " (Preview is available: " + pointer.getPreview().get().length + " bytes)" : ""));
-                File file = m.getAttachmentFile(pointer.getId());
-                if (file.exists()) {
-                    System.out.println("  Stored plaintext in: " + file);
-                }
-            }
+        if (ns.getList("recipient") != null && !ns.getList("recipient").isEmpty() && ns.getString("group") != null) {
+            System.err.println("You cannot specify recipients by phone number and groups at the same time");
+            System.exit(2);

         }
         }

+        return ns;

     }
 }
     }
 }