Implement multi account commands for dbus client

src/main/java/org/asamk/signal/dbus/DbusProvisioningManagerImpl.java

@@ -0,0 +1,53 @@
+package org.asamk.signal.dbus;
+
+import org.asamk.SignalControl;
+import org.asamk.signal.manager.ProvisioningManager;
+import org.asamk.signal.manager.UserAlreadyExists;
+import org.freedesktop.dbus.connections.impl.DBusConnection;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.concurrent.TimeoutException;
+
+/**
+ * This class implements the ProvisioningManager interface using the DBus Signal interface, where possible.
+ * It's used for the signal-cli dbus client mode (--dbus, --dbus-system)
+ */
+public class DbusProvisioningManagerImpl implements ProvisioningManager {
+
+    private final SignalControl signalControl;
+    private final DBusConnection connection;
+
+    private URI deviceLinkUri;
+
+    public DbusProvisioningManagerImpl(final SignalControl signalControl, DBusConnection connection) {
+        this.signalControl = signalControl;
+        this.connection = connection;
+    }
+
+    public DbusProvisioningManagerImpl(
+            final SignalControl signalControl,
+            DBusConnection connection,
+            URI deviceLinkUri
+    ) {
+        this.signalControl = signalControl;
+        this.connection = connection;
+        this.deviceLinkUri = deviceLinkUri;
+    }
+
+    @Override
+    public URI getDeviceLinkUri() throws TimeoutException, IOException {
+        try {
+            deviceLinkUri = new URI(signalControl.startLink());
+            return deviceLinkUri;
+        } catch (URISyntaxException e) {
+            throw new IOException(e);
+        }
+    }
+
+    @Override
+    public String finishDeviceLink(final String deviceName) throws IOException, TimeoutException, UserAlreadyExists {
+        return signalControl.finishLink(deviceLinkUri.toString(), deviceName);
+    }
+}