conky/src/bmpx.cc

/*
 *
 * Conky, a system monitor, based on torsmo
 *
 * Any original torsmo code is licensed under the BSD license
 *
 * All code written since the fork of torsmo is licensed under the GPL
 *
 * Please see COPYING for details
 *
 * Copyright (c) 2005-2018 Brenden Matthews, Philip Kovacs, et. al.
 *	(see AUTHORS)
 * All rights reserved.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#include "config.h"
#include "conky.h"
#include "logging.h"

#include <dbus/dbus-glib.h>
#include <bmp/dbus.hh>

#define DBUS_TYPE_G_STRING_VALUE_HASHTABLE \
  (dbus_g_type_get_map("GHashTable", G_TYPE_STRING, G_TYPE_VALUE))

static DBusGConnection *bus;
static DBusGProxy *remote_object;
static int connected = 0;
static char *unknown = "unknown";

void fail(GError *error, struct information *);

void update_bmpx() {
  GError *error = NULL;
  struct information *current_info = &info;
  gint current_track;
  GHashTable *metadata;

  if (connected == 0) {
    g_type_init();
    dbus_g_type_specialized_init();

    bus = dbus_g_bus_get(DBUS_BUS_SESSION, &error);
    if (bus == NULL) {
      NORM_ERR("BMPx error 1: %s\n", error->message);
      fail(error, current_info);
      return;
    }

    remote_object = dbus_g_proxy_new_for_name(
        bus, BMP_DBUS_SERVICE, BMP_DBUS_PATH__BMP, BMP_DBUS_INTERFACE__BMP);
    if (!remote_object) {
      NORM_ERR("BMPx error 2: %s\n", error->message);
      fail(error, current_info);
      return;
    }

    connected = 1;
  }

  if (connected == 1) {
    if (dbus_g_proxy_call(remote_object, "GetCurrentTrack", &error,
                          G_TYPE_INVALID, G_TYPE_INT, &current_track,
                          G_TYPE_INVALID)) {
    } else {
      NORM_ERR("BMPx error 3: %s\n", error->message);
      fail(error, current_info);
      return;
    }

    if (dbus_g_proxy_call(remote_object, "GetMetadataForListItem", &error,
                          G_TYPE_INT, current_track, G_TYPE_INVALID,
                          DBUS_TYPE_G_STRING_VALUE_HASHTABLE, &metadata,
                          G_TYPE_INVALID)) {
      free_and_zero(current_info->bmpx.title);
      free_and_zero(current_info->bmpx.artist);
      free_and_zero(current_info->bmpx.album);
      current_info->bmpx.title =
          g_value_dup_string(g_hash_table_lookup(metadata, "title"));
      current_info->bmpx.artist =
          g_value_dup_string(g_hash_table_lookup(metadata, "artist"));
      current_info->bmpx.album =
          g_value_dup_string(g_hash_table_lookup(metadata, "album"));
      current_info->bmpx.bitrate =
          g_value_get_int(g_hash_table_lookup(metadata, "bitrate"));
      current_info->bmpx.track =
          g_value_get_int(g_hash_table_lookup(metadata, "track-number"));
      current_info->bmpx.uri =
          g_value_get_string(g_hash_table_lookup(metadata, "location"));
    } else {
      NORM_ERR("BMPx error 4: %s\n", error->message);
      fail(error, current_info);
      return;
    }

    g_hash_table_destroy(metadata);
  } else {
    fail(error, current_info);
  }
}

void fail(GError *error, struct information *current_info) {
  if (error) {
    g_error_free(error);
  }
  if (current_info->bmpx.title) {
    g_free(current_info->bmpx.title);
    current_info->bmpx.title = 0;
  }
  if (current_info->bmpx.artist) {
    g_free(current_info->bmpx.artist);
    current_info->bmpx.artist = 0;
  }
  if (current_info->bmpx.album) {
    g_free(current_info->bmpx.album);
    current_info->bmpx.album = 0;
  }
  current_info->bmpx.title = unknown;
  current_info->bmpx.artist = unknown;
  current_info->bmpx.album = unknown;
  current_info->bmpx.bitrate = 0;
  current_info->bmpx.track = 0;
}

#define BMPX_PRINT_GENERATOR(name, fmt)                                      \
  void print_bmpx_##name(struct text_object *obj, char *p, int p_max_size) { \
    (void)obj;                                                               \
    snprintf(p, p_max_size, fmt, info.bmpx.name);                            \
  }

BMPX_PRINT_GENERATOR(title, "%s")
BMPX_PRINT_GENERATOR(artist, "%s")
BMPX_PRINT_GENERATOR(album, "%s")
BMPX_PRINT_GENERATOR(uri, "%s")
BMPX_PRINT_GENERATOR(track, "%i")
BMPX_PRINT_GENERATOR(bitrate, "%i")

#undef BMPX_PRINT_GENERATOR