/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 *
 * cc -o test-hal-seats `pkg-config --cflags --libs glib-2.0 dbus-glib-1` test-hal-seats.c
 */

#include <stdlib.h>
#include <stdio.h>

#include <glib.h>
#define DBUS_API_SUBJECT_TO_CHANGE
#include <dbus/dbus-glib.h>
#include <dbus/dbus-glib-lowlevel.h>

#define HAL_DBUS_NAME                           "org.freedesktop.Hal"
#define HAL_DBUS_MANAGER_PATH                   "/org/freedesktop/Hal/Manager"
#define HAL_DBUS_MANAGER_INTERFACE              "org.freedesktop.Hal.Manager"
#define HAL_DBUS_DEVICE_INTERFACE               "org.freedesktop.Hal.Device"
#define SEAT_PCI_DEVICE_CLASS                   3

static GMainLoop *loop;

static void
get_pci_seats (DBusGConnection *bus,
               DBusGProxy      *proxy,
               GList           *seats)
{
        char      **devices;
        const char *key;
        const char *value;
        GError     *error;
        gboolean    res;
        int         i;

        g_message ("Getting PCI seats");

        key = "info.bus";
        value = "pci";

        devices = NULL;
        error = NULL;
        res = dbus_g_proxy_call (proxy,
                                 "FindDeviceStringMatch",
                                 &error,
                                 G_TYPE_STRING, key,
                                 G_TYPE_STRING, value,
                                 G_TYPE_INVALID,
                                 G_TYPE_STRV, &devices,
                                 G_TYPE_INVALID);
        if (! res) {
                g_warning ("Unable to query HAL: %s", error->message);
                g_error_free (error);
        }

        /* now look for pci class 3 */
        key = "pci.device_class";
        for (i = 0; devices [i] != NULL; i++) {
                DBusGProxy *device_proxy;
                int         class_val;

                device_proxy = dbus_g_proxy_new_for_name (bus,
                                                          HAL_DBUS_NAME,
                                                          devices [i],
                                                          HAL_DBUS_DEVICE_INTERFACE);
                if (device_proxy == NULL) {
                        continue;
                }

                error = NULL;
                res = dbus_g_proxy_call (device_proxy,
                                         "GetPropertyInteger",
                                         &error,
                                         G_TYPE_STRING, key,
                                         G_TYPE_INVALID,
                                         G_TYPE_INT, &class_val,
                                         G_TYPE_INVALID);
                if (! res) {
                        g_warning ("Unable to query HAL: %s", error->message);
                        g_error_free (error);
                }

                if (class_val == SEAT_PCI_DEVICE_CLASS) {
                        g_message ("Found device: %s", devices [i]);
                        seats = g_list_prepend (seats, devices [i]);
                }

                g_object_unref (device_proxy);
        }

        g_strfreev (devices);
}

static void
list_seats (GList *seats)
{
        GList *l;
        for (l = seats; l != NULL; l = l->next) {
                g_message ("Found device: %s", (char *)l->data);
        }
}

static gboolean
test_hal_seats (void)
{
        GError          *error;
        DBusGConnection *bus;
        DBusGProxy      *proxy;
        GList           *seats;

        proxy = NULL;

        error = NULL;
        bus = dbus_g_bus_get (DBUS_BUS_SYSTEM, &error);
        if (bus == NULL) {
                g_warning ("Couldn't connect to system bus: %s",
                           error->message);
                g_error_free (error);
                goto out;
        }

        proxy = dbus_g_proxy_new_for_name (bus,
                                           HAL_DBUS_NAME,
                                           HAL_DBUS_MANAGER_PATH,
                                           HAL_DBUS_MANAGER_INTERFACE);
        if (proxy == NULL) {
                g_warning ("Couldn't create proxy for HAL Manager");
                goto out;
        }

        seats = NULL;

        get_pci_seats (bus, proxy, seats);

        list_seats (seats);

 out:
        if (proxy != NULL) {
                g_object_unref (proxy);
        }

        return FALSE;
}

int
main (int   argc,
      char *argv[])
{
        g_log_set_always_fatal (G_LOG_LEVEL_ERROR | G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_WARNING);

        g_type_init ();

        g_idle_add ((GSourceFunc)test_hal_seats, NULL);

        loop = g_main_loop_new (NULL, FALSE);
        g_main_loop_run (loop);
        g_main_loop_unref (loop);

        return 0;
}