/* GIO - GLib Input, Output and Streaming Library

 *

 * Copyright 2016 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/>.

 */

#include "config.h"

#include "xdp-dbus.h"

#include "giomodule-priv.h"

#include "gportalsupport.h"

#include "gproxyresolverportal.h"

struct _GProxyResolverPortal {

  GObject parent_instance;

  GXdpProxyResolver *resolver;

  gboolean network_available;

};

static void g_proxy_resolver_portal_iface_init (GProxyResolverInterface *iface);

G_DEFINE_TYPE_WITH_CODE (GProxyResolverPortal, g_proxy_resolver_portal, G_TYPE_OBJECT,

                         G_IMPLEMENT_INTERFACE (G_TYPE_PROXY_RESOLVER,

                                                g_proxy_resolver_portal_iface_init)

                         _g_io_modules_ensure_extension_points_registered ();

                         g_io_extension_point_implement (G_PROXY_RESOLVER_EXTENSION_POINT_NAME,

                                                         g_define_type_id,

                                                         "portal",

                                                         90))

static gboolean

ensure_resolver_proxy (GProxyResolverPortal *resolver)

{

  if (resolver->resolver)

    return TRUE;

  if (!glib_should_use_portal ())

    return FALSE;

  resolver->resolver = gxdp_proxy_resolver_proxy_new_for_bus_sync (G_BUS_TYPE_SESSION,

                                                                   G_DBUS_PROXY_FLAGS_NONE,

                                                                   "org.freedesktop.portal.Desktop",

                                                                   "/org/freedesktop/portal/desktop",

                                                                   NULL,

                                                                   NULL);

  resolver->network_available = glib_network_available_in_sandbox ();

  return resolver->resolver != NULL;

}

static void

g_proxy_resolver_portal_init (GProxyResolverPortal *resolver)

{

}

static gboolean

g_proxy_resolver_portal_is_supported (GProxyResolver *object)

{

  GProxyResolverPortal *resolver = G_PROXY_RESOLVER_PORTAL (object);

  char *name_owner;

  gboolean has_portal;

  if (!ensure_resolver_proxy (resolver))

    return FALSE;

  name_owner = g_dbus_proxy_get_name_owner (G_DBUS_PROXY (resolver->resolver));

  has_portal = name_owner != NULL;

  g_free (name_owner);

  return has_portal;

}

static const char *no_proxy[2] = { "direct://", NULL };

static gchar **

g_proxy_resolver_portal_lookup (GProxyResolver *proxy_resolver,

                                const gchar     *uri,

                                GCancellable    *cancellable,

                                GError         **error)

{

  GProxyResolverPortal *resolver = G_PROXY_RESOLVER_PORTAL (proxy_resolver);

  char **proxy = NULL;

  ensure_resolver_proxy (resolver);

  g_assert (resolver->resolver);

  if (!gxdp_proxy_resolver_call_lookup_sync (resolver->resolver,

                                             uri,

                                             &proxy,

                                             cancellable,

                                             error))

    return NULL;

  if (!resolver->network_available)

    {

      g_strfreev (proxy);

      proxy = g_strdupv ((gchar **)no_proxy);

    }

  return proxy;

}

static void

lookup_done (GObject      *source,

             GAsyncResult *result,

             gpointer      data)

{

  GTask *task = data;

  GError *error = NULL;

  gchar **proxies = NULL;

  if (!gxdp_proxy_resolver_call_lookup_finish (GXDP_PROXY_RESOLVER (source),

                                               &proxies,

                                               result,

                                               &error))

    g_task_return_error (task, error);

  else

    g_task_return_pointer (task, proxies, NULL);

  g_object_unref (task);

}

static void

g_proxy_resolver_portal_lookup_async (GProxyResolver      *proxy_resolver,

                                      const gchar         *uri,

                                      GCancellable        *cancellable,

                                      GAsyncReadyCallback  callback,

                                      gpointer             user_data)

{

  GProxyResolverPortal *resolver = G_PROXY_RESOLVER_PORTAL (proxy_resolver);

  GTask *task;

  ensure_resolver_proxy (resolver);

  g_assert (resolver->resolver);

  task = g_task_new (proxy_resolver, cancellable, callback, user_data);

  gxdp_proxy_resolver_call_lookup (resolver->resolver,

                                   uri,

                                   cancellable,

                                   lookup_done,

                                   g_object_ref (task));

  g_object_unref (task);

}

static gchar **

g_proxy_resolver_portal_lookup_finish (GProxyResolver  *proxy_resolver,

                                       GAsyncResult    *result,

                                       GError         **error)

{

  GProxyResolverPortal *resolver = G_PROXY_RESOLVER_PORTAL (proxy_resolver);

  GTask *task = G_TASK (result);

  char **proxies;

  proxies = g_task_propagate_pointer (task, error);

  if (proxies == NULL)

    return NULL;

  if (!resolver->network_available)

    {

      g_strfreev (proxies);

      proxies = g_strdupv ((gchar **)no_proxy);

    }

  return proxies;

}

static void

g_proxy_resolver_portal_finalize (GObject *object)

{

  GProxyResolverPortal *resolver = G_PROXY_RESOLVER_PORTAL (object);

  g_clear_object (&resolver->resolver);

  G_OBJECT_CLASS (g_proxy_resolver_portal_parent_class)->finalize (object);

}

static void

g_proxy_resolver_portal_class_init (GProxyResolverPortalClass *resolver_class)

{

  GObjectClass *object_class;

  object_class = G_OBJECT_CLASS (resolver_class);

  object_class->finalize = g_proxy_resolver_portal_finalize;

}

static void

g_proxy_resolver_portal_iface_init (GProxyResolverInterface *iface)

{

  iface->is_supported = g_proxy_resolver_portal_is_supported;

  iface->lookup = g_proxy_resolver_portal_lookup;

  iface->lookup_async = g_proxy_resolver_portal_lookup_async;

  iface->lookup_finish = g_proxy_resolver_portal_lookup_finish;

}