/* GDBus - GLib D-Bus Library

 *

 * Copyright (C) 2008-2010 Red Hat, Inc.

 *

 * SPDX-License-Identifier: LGPL-2.1-or-later

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * This library 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

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General

 * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.

 *

 * Author: David Zeuthen <davidz@redhat.com>

 */

#include "config.h"

#include "gdbusobject.h"

#include "gdbusobjectskeleton.h"

#include "gdbusinterfaceskeleton.h"

#include "gdbusprivate.h"

#include "gdbusmethodinvocation.h"

#include "gdbusintrospection.h"

#include "gdbusinterface.h"

#include "gdbusutils.h"

#include "glibintl.h"

/**

 * GDBusObjectSkeleton:

 *

 * A `GDBusObjectSkeleton` instance is essentially a group of D-Bus

 * interfaces. The set of exported interfaces on the object may be

 * dynamic and change at runtime.

 *

 * This type is intended to be used with [iface@Gio.DBusObjectManager].

 *

 * Since: 2.30

 */

struct _GDBusObjectSkeletonPrivate

{

  GMutex lock;

  gchar *object_path;

  GHashTable *map_name_to_iface;

};

enum

{

  PROP_0,

  PROP_G_OBJECT_PATH

};

enum

{

  AUTHORIZE_METHOD_SIGNAL,

  LAST_SIGNAL,

};

static guint signals[LAST_SIGNAL] = {0};

static void dbus_object_interface_init (GDBusObjectIface *iface);

G_DEFINE_TYPE_WITH_CODE (GDBusObjectSkeleton, g_dbus_object_skeleton, G_TYPE_OBJECT,

                         G_ADD_PRIVATE (GDBusObjectSkeleton)

                         G_IMPLEMENT_INTERFACE (G_TYPE_DBUS_OBJECT, dbus_object_interface_init))

static void

g_dbus_object_skeleton_finalize (GObject *_object)

{

  GDBusObjectSkeleton *object = G_DBUS_OBJECT_SKELETON (_object);

  g_free (object->priv->object_path);

  g_hash_table_unref (object->priv->map_name_to_iface);

  g_mutex_clear (&object->priv->lock);

  if (G_OBJECT_CLASS (g_dbus_object_skeleton_parent_class)->finalize != NULL)

    G_OBJECT_CLASS (g_dbus_object_skeleton_parent_class)->finalize (_object);

}

static void

g_dbus_object_skeleton_get_property (GObject    *_object,

                                     guint       prop_id,

                                     GValue     *value,

                                     GParamSpec *pspec)

{

  GDBusObjectSkeleton *object = G_DBUS_OBJECT_SKELETON (_object);

  switch (prop_id)

    {

    case PROP_G_OBJECT_PATH:

      g_mutex_lock (&object->priv->lock);

      g_value_set_string (value, object->priv->object_path);

      g_mutex_unlock (&object->priv->lock);

      break;

    default:

      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

      break;

    }

}

static void

g_dbus_object_skeleton_set_property (GObject       *_object,

                                     guint          prop_id,

                                     const GValue  *value,

                                     GParamSpec    *pspec)

{

  GDBusObjectSkeleton *object = G_DBUS_OBJECT_SKELETON (_object);

  switch (prop_id)

    {

    case PROP_G_OBJECT_PATH:

      g_dbus_object_skeleton_set_object_path (object, g_value_get_string (value));

      break;

    default:

      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

      break;

    }

}

static gboolean

g_dbus_object_skeleton_authorize_method_default (GDBusObjectSkeleton    *object,

                                                 GDBusInterfaceSkeleton *interface,

                                                 GDBusMethodInvocation  *invocation)

{

  return TRUE;

}

static void

g_dbus_object_skeleton_class_init (GDBusObjectSkeletonClass *klass)

{

  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);

  gobject_class->finalize     = g_dbus_object_skeleton_finalize;

  gobject_class->set_property = g_dbus_object_skeleton_set_property;

  gobject_class->get_property = g_dbus_object_skeleton_get_property;

  klass->authorize_method = g_dbus_object_skeleton_authorize_method_default;

  /**

   * GDBusObjectSkeleton:g-object-path:

   *

   * The object path where the object is exported.

   *

   * Since: 2.30

   */

  g_object_class_install_property (gobject_class,

                                   PROP_G_OBJECT_PATH,

                                   g_param_spec_string ("g-object-path", NULL, NULL,

                                                        NULL,

                                                        G_PARAM_READABLE |

                                                        G_PARAM_WRITABLE |

                                                        G_PARAM_CONSTRUCT |

                                                        G_PARAM_STATIC_STRINGS));

  /**

   * GDBusObjectSkeleton::authorize-method:

   * @object: The #GDBusObjectSkeleton emitting the signal.

   * @interface: The #GDBusInterfaceSkeleton that @invocation is for.

   * @invocation: A #GDBusMethodInvocation.

   *

   * Emitted when a method is invoked by a remote caller and used to

   * determine if the method call is authorized.

   *

   * This signal is like #GDBusInterfaceSkeleton's

   * #GDBusInterfaceSkeleton::g-authorize-method signal,

   * except that it is for the enclosing object.

   *

   * The default class handler just returns %TRUE.

   *

   * Returns: %TRUE if the call is authorized, %FALSE otherwise.

   *

   * Since: 2.30

   */

  signals[AUTHORIZE_METHOD_SIGNAL] =

    g_signal_new (I_("authorize-method"),

                  G_TYPE_DBUS_OBJECT_SKELETON,

                  G_SIGNAL_RUN_LAST,

                  G_STRUCT_OFFSET (GDBusObjectSkeletonClass, authorize_method),

                  _g_signal_accumulator_false_handled,

                  NULL,

                  NULL,

                  G_TYPE_BOOLEAN,

                  2,

                  G_TYPE_DBUS_INTERFACE_SKELETON,

                  G_TYPE_DBUS_METHOD_INVOCATION);

}

static void

g_dbus_object_skeleton_init (GDBusObjectSkeleton *object)

{

  object->priv = g_dbus_object_skeleton_get_instance_private (object);

  g_mutex_init (&object->priv->lock);

  object->priv->map_name_to_iface = g_hash_table_new_full (g_str_hash,

                                                           g_str_equal,

                                                           g_free,

                                                           (GDestroyNotify) g_object_unref);

}

/**

 * g_dbus_object_skeleton_new:

 * @object_path: An object path.

 *

 * Creates a new #GDBusObjectSkeleton.

 *

 * Returns: A #GDBusObjectSkeleton. Free with g_object_unref().

 *

 * Since: 2.30

 */

GDBusObjectSkeleton *

g_dbus_object_skeleton_new (const gchar *object_path)

{

  g_return_val_if_fail (g_variant_is_object_path (object_path), NULL);

  return G_DBUS_OBJECT_SKELETON (g_object_new (G_TYPE_DBUS_OBJECT_SKELETON,

                                               "g-object-path", object_path,

                                               NULL));

}

/**

 * g_dbus_object_skeleton_set_object_path:

 * @object: A #GDBusObjectSkeleton.

 * @object_path: A valid D-Bus object path.

 *

 * Sets the object path for @object.

 *

 * Since: 2.30

 */

void

g_dbus_object_skeleton_set_object_path (GDBusObjectSkeleton *object,

                                        const gchar     *object_path)

{

  g_return_if_fail (G_IS_DBUS_OBJECT_SKELETON (object));

  g_return_if_fail (object_path == NULL || g_variant_is_object_path (object_path));

  g_mutex_lock (&object->priv->lock);

  /* TODO: fail if object is currently exported */

  if (g_strcmp0 (object->priv->object_path, object_path) != 0)

    {

      g_free (object->priv->object_path);

      object->priv->object_path = g_strdup (object_path);

      g_mutex_unlock (&object->priv->lock);

      g_object_notify (G_OBJECT (object), "g-object-path");

    }

  else

    {

      g_mutex_unlock (&object->priv->lock);

    }

}

static const gchar *

g_dbus_object_skeleton_get_object_path (GDBusObject *_object)

{

  GDBusObjectSkeleton *object = G_DBUS_OBJECT_SKELETON (_object);

  const gchar *ret;

  g_mutex_lock (&object->priv->lock);

  ret = object->priv->object_path;

  g_mutex_unlock (&object->priv->lock);

  return ret;

}

/**

 * g_dbus_object_skeleton_add_interface:

 * @object: A #GDBusObjectSkeleton.

 * @interface_: A #GDBusInterfaceSkeleton.

 *

 * Adds @interface_ to @object.

 *

 * If @object already contains a #GDBusInterfaceSkeleton with the same

 * interface name, it is removed before @interface_ is added.

 *

 * Note that @object takes its own reference on @interface_ and holds

 * it until removed.

 *

 * Since: 2.30

 */

void

g_dbus_object_skeleton_add_interface (GDBusObjectSkeleton     *object,

                                      GDBusInterfaceSkeleton  *interface_)

{

  GDBusInterfaceInfo *info;

  GDBusInterface *interface_to_remove;

  g_return_if_fail (G_IS_DBUS_OBJECT_SKELETON (object));

  g_return_if_fail (G_IS_DBUS_INTERFACE_SKELETON (interface_));

  g_mutex_lock (&object->priv->lock);

  info = g_dbus_interface_skeleton_get_info (interface_);

  g_object_ref (interface_);

  interface_to_remove = g_hash_table_lookup (object->priv->map_name_to_iface, info->name);

  if (interface_to_remove != NULL)

    {

      g_object_ref (interface_to_remove);

      g_warn_if_fail (g_hash_table_remove (object->priv->map_name_to_iface, info->name));

    }

  g_hash_table_insert (object->priv->map_name_to_iface,

                       g_strdup (info->name),

                       g_object_ref (interface_));

  g_dbus_interface_set_object (G_DBUS_INTERFACE (interface_), G_DBUS_OBJECT (object));

  g_mutex_unlock (&object->priv->lock);

  if (interface_to_remove != NULL)

    {

      g_dbus_interface_set_object (interface_to_remove, NULL);

      g_signal_emit_by_name (object,

                             "interface-removed",

                             interface_to_remove);

      g_object_unref (interface_to_remove);

    }

  g_signal_emit_by_name (object,

                         "interface-added",

                         interface_);

  g_object_unref (interface_);

}

/**

 * g_dbus_object_skeleton_remove_interface:

 * @object: A #GDBusObjectSkeleton.

 * @interface_: A #GDBusInterfaceSkeleton.

 *

 * Removes @interface_ from @object.

 *

 * Since: 2.30

 */

void

g_dbus_object_skeleton_remove_interface  (GDBusObjectSkeleton    *object,

                                          GDBusInterfaceSkeleton *interface_)

{

  GDBusInterfaceSkeleton *other_interface;

  GDBusInterfaceInfo *info;

  g_return_if_fail (G_IS_DBUS_OBJECT_SKELETON (object));

  g_return_if_fail (G_IS_DBUS_INTERFACE (interface_));

  g_mutex_lock (&object->priv->lock);

  info = g_dbus_interface_skeleton_get_info (interface_);

  other_interface = g_hash_table_lookup (object->priv->map_name_to_iface, info->name);

  if (other_interface == NULL)

    {

      g_mutex_unlock (&object->priv->lock);

      g_warning ("Tried to remove interface with name %s from object "

                 "at path %s but no such interface exists",

                 info->name,

                 object->priv->object_path);

    }

  else if (other_interface != interface_)

    {

      g_mutex_unlock (&object->priv->lock);

      g_warning ("Tried to remove interface %p with name %s from object "

                 "at path %s but the object has the interface %p",

                 interface_,

                 info->name,

                 object->priv->object_path,

                 other_interface);

    }

  else

    {

      g_object_ref (interface_);

      g_warn_if_fail (g_hash_table_remove (object->priv->map_name_to_iface, info->name));

      g_mutex_unlock (&object->priv->lock);

      g_dbus_interface_set_object (G_DBUS_INTERFACE (interface_), NULL);

      g_signal_emit_by_name (object,

                             "interface-removed",

                             interface_);

      g_object_unref (interface_);

    }

}

/**

 * g_dbus_object_skeleton_remove_interface_by_name:

 * @object: A #GDBusObjectSkeleton.

 * @interface_name: A D-Bus interface name.

 *

 * Removes the #GDBusInterface with @interface_name from @object.

 *

 * If no D-Bus interface of the given interface exists, this function

 * does nothing.

 *

 * Since: 2.30

 */

void

g_dbus_object_skeleton_remove_interface_by_name (GDBusObjectSkeleton *object,

                                                 const gchar         *interface_name)

{

  GDBusInterface *interface;

  g_return_if_fail (G_IS_DBUS_OBJECT_SKELETON (object));

  g_return_if_fail (g_dbus_is_interface_name (interface_name));

  g_mutex_lock (&object->priv->lock);

  interface = g_hash_table_lookup (object->priv->map_name_to_iface, interface_name);

  if (interface != NULL)

    {

      g_object_ref (interface);

      g_warn_if_fail (g_hash_table_remove (object->priv->map_name_to_iface, interface_name));

      g_mutex_unlock (&object->priv->lock);

      g_dbus_interface_set_object (interface, NULL);

      g_signal_emit_by_name (object,

                             "interface-removed",

                             interface);

      g_object_unref (interface);

    }

  else

    {

      g_mutex_unlock (&object->priv->lock);

    }

}

static GDBusInterface *

g_dbus_object_skeleton_get_interface (GDBusObject  *_object,

                                      const gchar  *interface_name)

{

  GDBusObjectSkeleton *object = G_DBUS_OBJECT_SKELETON (_object);

  GDBusInterface *ret;

  g_return_val_if_fail (G_IS_DBUS_OBJECT_SKELETON (object), NULL);

  g_return_val_if_fail (g_dbus_is_interface_name (interface_name), NULL);

  g_mutex_lock (&object->priv->lock);

  ret = g_hash_table_lookup (object->priv->map_name_to_iface, interface_name);

  if (ret != NULL)

    g_object_ref (ret);

  g_mutex_unlock (&object->priv->lock);

  return ret;

}

static GList *

g_dbus_object_skeleton_get_interfaces (GDBusObject *_object)

{

  GDBusObjectSkeleton *object = G_DBUS_OBJECT_SKELETON (_object);

  GList *ret;

  g_return_val_if_fail (G_IS_DBUS_OBJECT_SKELETON (object), NULL);

  ret = NULL;

  g_mutex_lock (&object->priv->lock);

  ret = g_hash_table_get_values (object->priv->map_name_to_iface);

  g_list_foreach (ret, (GFunc) g_object_ref, NULL);

  g_mutex_unlock (&object->priv->lock);

  return ret;

}

/**

 * g_dbus_object_skeleton_flush:

 * @object: A #GDBusObjectSkeleton.

 *

 * This method simply calls g_dbus_interface_skeleton_flush() on all

 * interfaces belonging to @object. See that method for when flushing

 * is useful.

 *

 * Since: 2.30

 */

void

g_dbus_object_skeleton_flush (GDBusObjectSkeleton *object)

{

  GPtrArray *to_flush;

  g_mutex_lock (&object->priv->lock);

  to_flush = g_hash_table_get_values_as_ptr_array (object->priv->map_name_to_iface);

  g_ptr_array_foreach (to_flush, (GFunc) g_object_ref, NULL);

  g_ptr_array_set_free_func (to_flush, g_object_unref);

  g_mutex_unlock (&object->priv->lock);

  for (guint i = 0; i < to_flush->len; ++i)

    {

      g_dbus_interface_skeleton_flush (

        G_DBUS_INTERFACE_SKELETON (g_ptr_array_index (to_flush, i)));

    }

  g_clear_pointer (&to_flush, g_ptr_array_unref);

}

static void

dbus_object_interface_init (GDBusObjectIface *iface)

{

  iface->get_object_path = g_dbus_object_skeleton_get_object_path;

  iface->get_interfaces  = g_dbus_object_skeleton_get_interfaces;

  iface->get_interface  = g_dbus_object_skeleton_get_interface;

}

gboolean

_g_dbus_object_skeleton_has_authorize_method_handlers (GDBusObjectSkeleton *object)

{

  gboolean has_handlers;

  gboolean has_default_class_handler;

  has_handlers = g_signal_has_handler_pending (object,

                                               signals[AUTHORIZE_METHOD_SIGNAL],

                                               0,

                                               TRUE);

  has_default_class_handler = (G_DBUS_OBJECT_SKELETON_GET_CLASS (object)->authorize_method ==

                               g_dbus_object_skeleton_authorize_method_default);

  return has_handlers || !has_default_class_handler;

}