/*

 * fprintd example to delete fingerprints

 * Copyright (C) 2008 Daniel Drake <dsd@gentoo.org>

 * Copyright (C) 2020 Marco Trevisan <marco.trevisan@canonical.com>

 *

 * 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 2 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, write to the Free Software Foundation, Inc.,

 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

 */

#include <stdio.h>

#include <stdlib.h>

#include <locale.h>

#include "fprintd-dbus.h"

static FprintDBusManager *manager = NULL;

static GDBusConnection *connection = NULL;

static void

create_manager (void)

{

  g_autoptr(GError) error = NULL;

  connection = g_bus_get_sync (G_BUS_TYPE_SYSTEM, NULL, &error);

  if (connection == NULL)

    {

      g_print ("Failed to connect to session bus: %s\n", error->message);

      exit (1);

    }

  manager = fprint_dbus_manager_proxy_new_sync (connection,

                                                G_DBUS_PROXY_FLAGS_NONE,

                                                "net.reactivated.Fprint",

                                                "/net/reactivated/Fprint/Manager",

                                                NULL, &error);

  if (manager == NULL)

    {

      g_print ("Failed to get Fprintd manager: %s\n", error->message);

      exit (1);

    }

}

static void

delete_fingerprints (FprintDBusDevice *dev, const char *username)

{

  g_autoptr(GError) error = NULL;

  if (!fprint_dbus_device_call_claim_sync (dev, username, NULL, &error))

    {

      g_print ("failed to claim device: %s\n", error->message);

      exit (1);

    }

  if (!fprint_dbus_device_call_delete_enrolled_fingers2_sync (dev, NULL,

                                                              &error))

    {

      gboolean ignore_error = FALSE;

      if (g_dbus_error_is_remote_error (error))

        {

          g_autofree char *dbus_error =

            g_dbus_error_get_remote_error (error);

          if (g_str_equal (dbus_error,

                           "net.reactivated.Fprint.Error.NoEnrolledPrints"))

            {

              g_print ("No fingerprints to delete on %s\n",

                       fprint_dbus_device_get_name (dev));

              ignore_error = TRUE;

            }

        }

      if (!ignore_error)

        {

          g_print ("ListEnrolledFingers failed: %s\n",

                   error->message);

          exit (1);

        }

      else

        {

          g_print ("No fingerprints to delete on %s\n",

                   fprint_dbus_device_get_name (dev));

        }

    }

  else

    {

      g_print ("Fingerprints deleted on %s\n",

               fprint_dbus_device_get_name (dev));

    }

  g_clear_error (&error);

  if (!fprint_dbus_device_call_release_sync (dev, NULL, &error))

    {

      g_print ("ReleaseDevice failed: %s\n", error->message);

      exit (1);

    }

}

static void

process_devices (char **argv)

{

  g_autoptr(GError) error = NULL;

  g_auto(GStrv) devices = NULL;

  char *path;

  guint num_devices;

  guint i;

  if (!fprint_dbus_manager_call_get_devices_sync (manager, &devices,

                                                  NULL, &error))

    {

      g_print ("Impossible to get devices: %s\n", error->message);

      exit (1);

    }

  num_devices = g_strv_length (devices);

  if (num_devices == 0)

    {

      g_print ("No devices available\n");

      exit (1);

    }

  g_print ("found %u devices\n", num_devices);

  for (i = 0; devices[i] != NULL; i++)

    {

      path = devices[i];

      g_print ("Device at %s\n", path);

    }

  for (i = 0; devices[i] != NULL; i++)

    {

      g_autoptr(FprintDBusDevice) dev = NULL;

      guint j;

      path = devices[i];

      g_print ("Using device %s\n", path);

      /* NOTE: We should handle error cases! */

      dev = fprint_dbus_device_proxy_new_sync (connection,

                                               G_DBUS_PROXY_FLAGS_NONE,

                                               "net.reactivated.Fprint",

                                               path, NULL, NULL);

      for (j = 1; argv[j] != NULL; j++)

        delete_fingerprints (dev, argv[j]);

    }

}

int

main (int argc, char **argv)

{

  setlocale (LC_ALL, "");

  create_manager ();

  if (argc < 2)

    {

      g_print ("Usage: %s <username> [usernames...]\n", argv[0]);

      return 1;

    }

  process_devices (argv);

  return 0;

}