1 /* ncmpc (Ncurses MPD Client)
2 * (c) 2004-2017 The Music Player Daemon Project
3 * Project homepage: http://musicpd.org
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
20 #include "mpdclient.h"
21 #include "callbacks.h"
22 #include "filelist.h"
23 #include "config.h"
24 #include "gidle.h"
25 #include "charset.h"
27 #ifdef ENABLE_ASYNC_CONNECT
28 #include "aconnect.h"
29 #endif
31 #include <mpd/client.h>
33 #include <assert.h>
35 static gboolean
36 mpdclient_enter_idle_callback(gpointer user_data)
37 {
38 struct mpdclient *c = user_data;
39 assert(c->enter_idle_source_id != 0);
40 assert(c->source != NULL);
41 assert(!c->idle);
43 c->enter_idle_source_id = 0;
44 c->idle = mpd_glib_enter(c->source);
45 return false;
46 }
48 static void
49 mpdclient_schedule_enter_idle(struct mpdclient *c)
50 {
51 assert(c != NULL);
52 assert(c->source != NULL);
54 if (c->enter_idle_source_id == 0)
55 /* automatically re-enter MPD "idle" mode */
56 c->enter_idle_source_id =
57 g_idle_add(mpdclient_enter_idle_callback, c);
58 }
60 static void
61 mpdclient_cancel_enter_idle(struct mpdclient *c)
62 {
63 if (c->enter_idle_source_id != 0) {
64 g_source_remove(c->enter_idle_source_id);
65 c->enter_idle_source_id = 0;
66 }
67 }
69 static void
70 mpdclient_invoke_error_callback(enum mpd_error error,
71 const char *message)
72 {
73 char *allocated;
74 if (error == MPD_ERROR_SERVER)
75 /* server errors are UTF-8, the others are locale */
76 message = allocated = utf8_to_locale(message);
77 else
78 allocated = NULL;
80 mpdclient_error_callback(message);
81 g_free(allocated);
82 }
84 static void
85 mpdclient_invoke_error_callback1(struct mpdclient *c)
86 {
87 assert(c != NULL);
88 assert(c->connection != NULL);
90 struct mpd_connection *connection = c->connection;
92 enum mpd_error error = mpd_connection_get_error(connection);
93 assert(error != MPD_ERROR_SUCCESS);
95 mpdclient_invoke_error_callback(error,
96 mpd_connection_get_error_message(connection));
97 }
99 static void
100 mpdclient_gidle_callback(enum mpd_error error,
101 gcc_unused enum mpd_server_error server_error,
102 const char *message, enum mpd_idle events,
103 void *ctx)
104 {
105 struct mpdclient *c = ctx;
107 c->idle = false;
109 assert(mpdclient_is_connected(c));
111 if (error != MPD_ERROR_SUCCESS) {
112 mpdclient_invoke_error_callback(error, message);
113 mpdclient_disconnect(c);
114 mpdclient_lost_callback();
115 return;
116 }
118 c->events |= events;
119 mpdclient_update(c);
121 mpdclient_idle_callback(c->events);
123 c->events = 0;
125 if (c->source != NULL)
126 mpdclient_schedule_enter_idle(c);
127 }
129 /****************************************************************************/
130 /*** mpdclient functions ****************************************************/
131 /****************************************************************************/
133 bool
134 mpdclient_handle_error(struct mpdclient *c)
135 {
136 enum mpd_error error = mpd_connection_get_error(c->connection);
138 assert(error != MPD_ERROR_SUCCESS);
140 if (error == MPD_ERROR_SERVER &&
141 mpd_connection_get_server_error(c->connection) == MPD_SERVER_ERROR_PERMISSION &&
142 mpdclient_auth_callback(c))
143 return true;
145 mpdclient_invoke_error_callback(error,
146 mpd_connection_get_error_message(c->connection));
148 if (!mpd_connection_clear_error(c->connection)) {
149 mpdclient_disconnect(c);
150 mpdclient_lost_callback();
151 }
153 return false;
154 }
156 #ifdef ENABLE_ASYNC_CONNECT
157 #ifndef WIN32
159 static bool
160 is_local_socket(const char *host)
161 {
162 return *host == '/' || *host == '@';
163 }
165 static bool
166 settings_is_local_socket(const struct mpd_settings *settings)
167 {
168 const char *host = mpd_settings_get_host(settings);
169 return host != NULL && is_local_socket(host);
170 }
172 #endif
173 #endif
175 struct mpdclient *
176 mpdclient_new(const gchar *host, unsigned port,
177 unsigned timeout_ms, const gchar *password)
178 {
179 struct mpdclient *c = g_new0(struct mpdclient, 1);
181 #ifdef ENABLE_ASYNC_CONNECT
182 c->settings = mpd_settings_new(host, port, timeout_ms,
183 NULL, NULL);
184 if (c->settings == NULL)
185 g_error("Out of memory");
187 #ifndef WIN32
188 c->settings2 = host == NULL && port == 0 &&
189 settings_is_local_socket(c->settings)
190 ? mpd_settings_new(host, 6600, timeout_ms, NULL, NULL)
191 : NULL;
192 #endif
194 #else
195 c->host = host;
196 c->port = port;
197 #endif
199 c->timeout_ms = timeout_ms;
200 c->password = password;
202 playlist_init(&c->playlist);
203 c->volume = -1;
204 c->events = 0;
205 c->playing = false;
207 return c;
208 }
210 void
211 mpdclient_free(struct mpdclient *c)
212 {
213 mpdclient_disconnect(c);
215 mpdclient_playlist_free(&c->playlist);
217 #ifdef ENABLE_ASYNC_CONNECT
218 mpd_settings_free(c->settings);
220 #ifndef WIN32
221 if (c->settings2 != NULL)
222 mpd_settings_free(c->settings2);
223 #endif
224 #endif
226 g_free(c);
227 }
229 static char *
230 settings_name(const struct mpd_settings *settings)
231 {
232 assert(settings != NULL);
234 const char *host = mpd_settings_get_host(settings);
235 if (host == NULL)
236 host = "unknown";
238 if (host[0] == '/')
239 return g_strdup(host);
241 unsigned port = mpd_settings_get_port(settings);
242 if (port == 0 || port == 6600)
243 return g_strdup(host);
245 return g_strdup_printf("%s:%u", host, port);
246 }
248 char *
249 mpdclient_settings_name(const struct mpdclient *c)
250 {
251 assert(c != NULL);
253 #ifdef ENABLE_ASYNC_CONNECT
254 return settings_name(c->settings);
255 #else
256 struct mpd_settings *settings =
257 mpd_settings_new(c->host, c->port, 0, NULL, NULL);
258 if (settings == NULL)
259 return g_strdup("unknown");
261 char *name = settings_name(settings);
262 mpd_settings_free(settings);
263 return name;
264 #endif
265 }
267 static void
268 mpdclient_status_free(struct mpdclient *c)
269 {
270 if (c->status == NULL)
271 return;
273 mpd_status_free(c->status);
274 c->status = NULL;
276 c->volume = -1;
277 c->playing = false;
278 }
280 void
281 mpdclient_disconnect(struct mpdclient *c)
282 {
283 #ifdef ENABLE_ASYNC_CONNECT
284 if (c->async_connect != NULL) {
285 aconnect_cancel(c->async_connect);
286 c->async_connect = NULL;
287 }
288 #endif
290 mpdclient_cancel_enter_idle(c);
292 if (c->source != NULL) {
293 mpd_glib_free(c->source);
294 c->source = NULL;
295 c->idle = false;
296 }
298 if (c->connection) {
299 mpd_connection_free(c->connection);
300 ++c->connection_id;
301 }
302 c->connection = NULL;
304 mpdclient_status_free(c);
306 playlist_clear(&c->playlist);
308 if (c->song)
309 c->song = NULL;
311 /* everything has changed after a disconnect */
312 c->events |= MPD_IDLE_ALL;
313 }
315 static bool
316 mpdclient_connected(struct mpdclient *c,
317 struct mpd_connection *connection)
318 {
319 c->connection = connection;
321 if (mpd_connection_get_error(connection) != MPD_ERROR_SUCCESS) {
322 mpdclient_invoke_error_callback1(c);
323 mpdclient_disconnect(c);
324 mpdclient_failed_callback();
325 return false;
326 }
328 #ifdef ENABLE_ASYNC_CONNECT
329 if (c->timeout_ms > 0)
330 mpd_connection_set_timeout(connection, c->timeout_ms);
331 #endif
333 /* send password */
334 if (c->password != NULL &&
335 !mpd_run_password(connection, c->password)) {
336 mpdclient_invoke_error_callback1(c);
337 mpdclient_disconnect(c);
338 mpdclient_failed_callback();
339 return false;
340 }
342 c->source = mpd_glib_new(connection,
343 mpdclient_gidle_callback, c);
344 mpdclient_schedule_enter_idle(c);
346 ++c->connection_id;
348 mpdclient_connected_callback();
349 return true;
350 }
352 #ifdef ENABLE_ASYNC_CONNECT
354 static void
355 mpdclient_aconnect_start(struct mpdclient *c,
356 const struct mpd_settings *settings);
358 static const struct mpd_settings *
359 mpdclient_get_settings(const struct mpdclient *c)
360 {
361 #ifndef WIN32
362 if (c->connecting2)
363 return c->settings2;
364 #endif
366 return c->settings;
367 }
369 static void
370 mpdclient_connect_success(struct mpd_connection *connection, void *ctx)
371 {
372 struct mpdclient *c = ctx;
373 assert(c->async_connect != NULL);
374 c->async_connect = NULL;
376 const char *password =
377 mpd_settings_get_password(mpdclient_get_settings(c));
378 if (password != NULL && !mpd_run_password(connection, password)) {
379 mpdclient_error_callback(mpd_connection_get_error_message(connection));
380 mpd_connection_free(connection);
381 mpdclient_failed_callback();
382 return;
383 }
385 mpdclient_connected(c, connection);
386 }
388 static void
389 mpdclient_connect_error(const char *message, void *ctx)
390 {
391 struct mpdclient *c = ctx;
392 assert(c->async_connect != NULL);
393 c->async_connect = NULL;
395 #ifndef WIN32
396 if (!c->connecting2 && c->settings2 != NULL) {
397 c->connecting2 = true;
398 mpdclient_aconnect_start(c, c->settings2);
399 return;
400 }
401 #endif
403 mpdclient_error_callback(message);
404 mpdclient_failed_callback();
405 }
407 static const struct aconnect_handler mpdclient_connect_handler = {
408 .success = mpdclient_connect_success,
409 .error = mpdclient_connect_error,
410 };
412 static void
413 mpdclient_aconnect_start(struct mpdclient *c,
414 const struct mpd_settings *settings)
415 {
416 aconnect_start(&c->async_connect,
417 mpd_settings_get_host(settings),
418 mpd_settings_get_port(settings),
419 &mpdclient_connect_handler, c);
420 }
422 #endif
424 void
425 mpdclient_connect(struct mpdclient *c)
426 {
427 /* close any open connection */
428 mpdclient_disconnect(c);
430 #ifdef ENABLE_ASYNC_CONNECT
431 #ifndef WIN32
432 c->connecting2 = false;
433 #endif
434 mpdclient_aconnect_start(c, c->settings);
435 #else
436 /* connect to MPD */
437 struct mpd_connection *connection =
438 mpd_connection_new(c->host, c->port, c->timeout_ms);
439 if (connection == NULL)
440 g_error("Out of memory");
442 mpdclient_connected(c, connection);
443 #endif
444 }
446 bool
447 mpdclient_update(struct mpdclient *c)
448 {
449 struct mpd_connection *connection = mpdclient_get_connection(c);
451 if (connection == NULL)
452 return false;
454 /* free the old status */
455 mpdclient_status_free(c);
457 /* retrieve new status */
458 c->status = mpd_run_status(connection);
459 if (c->status == NULL)
460 return mpdclient_handle_error(c);
462 c->volume = mpd_status_get_volume(c->status);
463 c->playing = mpd_status_get_state(c->status) == MPD_STATE_PLAY;
465 /* check if the playlist needs an update */
466 if (c->playlist.version != mpd_status_get_queue_version(c->status)) {
467 bool retval;
469 if (!playlist_is_empty(&c->playlist))
470 retval = mpdclient_playlist_update_changes(c);
471 else
472 retval = mpdclient_playlist_update(c);
473 if (!retval)
474 return false;
475 }
477 /* update the current song */
478 if (!c->song || mpd_status_get_song_id(c->status) >= 0) {
479 c->song = playlist_get_song(&c->playlist,
480 mpd_status_get_song_pos(c->status));
481 }
483 return true;
484 }
486 struct mpd_connection *
487 mpdclient_get_connection(struct mpdclient *c)
488 {
489 if (c->source != NULL && c->idle) {
490 c->idle = false;
491 mpd_glib_leave(c->source);
493 if (c->source != NULL)
494 mpdclient_schedule_enter_idle(c);
495 }
497 return c->connection;
498 }
500 static struct mpd_status *
501 mpdclient_recv_status(struct mpdclient *c)
502 {
503 assert(c->connection != NULL);
505 struct mpd_status *status = mpd_recv_status(c->connection);
506 if (status == NULL) {
507 mpdclient_handle_error(c);
508 return NULL;
509 }
511 if (c->status != NULL)
512 mpd_status_free(c->status);
513 return c->status = status;
514 }
516 /****************************************************************************/
517 /*** MPD Commands **********************************************************/
518 /****************************************************************************/
520 bool
521 mpdclient_cmd_crop(struct mpdclient *c)
522 {
523 if (!mpdclient_is_playing(c))
524 return false;
526 int length = mpd_status_get_queue_length(c->status);
527 int current = mpd_status_get_song_pos(c->status);
528 if (current < 0 || mpd_status_get_queue_length(c->status) < 2)
529 return true;
531 struct mpd_connection *connection = mpdclient_get_connection(c);
532 if (connection == NULL)
533 return false;
535 mpd_command_list_begin(connection, false);
537 if (current < length - 1)
538 mpd_send_delete_range(connection, current + 1, length);
539 if (current > 0)
540 mpd_send_delete_range(connection, 0, current);
542 mpd_command_list_end(connection);
544 return mpdclient_finish_command(c);
545 }
547 bool
548 mpdclient_cmd_clear(struct mpdclient *c)
549 {
550 struct mpd_connection *connection = mpdclient_get_connection(c);
551 if (connection == NULL)
552 return false;
554 /* send "clear" and "status" */
555 if (!mpd_command_list_begin(connection, false) ||
556 !mpd_send_clear(connection) ||
557 !mpd_send_status(connection) ||
558 !mpd_command_list_end(connection))
559 return mpdclient_handle_error(c);
561 /* receive the new status, store it in the mpdclient struct */
563 struct mpd_status *status = mpdclient_recv_status(c);
564 if (status == NULL)
565 return false;
567 if (!mpd_response_finish(connection))
568 return mpdclient_handle_error(c);
570 /* update mpdclient.playlist */
572 if (mpd_status_get_queue_length(status) == 0) {
573 /* after the "clear" command, the queue is really
574 empty - this means we can clear it locally,
575 reducing the UI latency */
576 playlist_clear(&c->playlist);
577 c->playlist.version = mpd_status_get_queue_version(status);
578 c->song = NULL;
579 }
581 c->events |= MPD_IDLE_QUEUE;
582 return true;
583 }
585 bool
586 mpdclient_cmd_volume(struct mpdclient *c, gint value)
587 {
588 struct mpd_connection *connection = mpdclient_get_connection(c);
589 if (connection == NULL)
590 return false;
592 mpd_send_set_volume(connection, value);
593 return mpdclient_finish_command(c);
594 }
596 bool
597 mpdclient_cmd_volume_up(struct mpdclient *c)
598 {
599 if (c->volume < 0 || c->volume >= 100)
600 return true;
602 struct mpd_connection *connection = mpdclient_get_connection(c);
603 if (connection == NULL)
604 return false;
606 return mpdclient_cmd_volume(c, ++c->volume);
607 }
609 bool
610 mpdclient_cmd_volume_down(struct mpdclient *c)
611 {
612 if (c->volume <= 0)
613 return true;
615 struct mpd_connection *connection = mpdclient_get_connection(c);
616 if (connection == NULL)
617 return false;
619 return mpdclient_cmd_volume(c, --c->volume);
620 }
622 bool
623 mpdclient_cmd_add_path(struct mpdclient *c, const gchar *path_utf8)
624 {
625 struct mpd_connection *connection = mpdclient_get_connection(c);
626 if (connection == NULL)
627 return false;
629 return mpd_send_add(connection, path_utf8)?
630 mpdclient_finish_command(c) : false;
631 }
633 bool
634 mpdclient_cmd_add(struct mpdclient *c, const struct mpd_song *song)
635 {
636 assert(c != NULL);
637 assert(song != NULL);
639 struct mpd_connection *connection = mpdclient_get_connection(c);
640 if (connection == NULL || c->status == NULL)
641 return false;
643 /* send the add command to mpd; at the same time, get the new
644 status (to verify the new playlist id) and the last song
645 (we hope that's the song we just added) */
647 if (!mpd_command_list_begin(connection, true) ||
648 !mpd_send_add(connection, mpd_song_get_uri(song)) ||
649 !mpd_send_status(connection) ||
650 !mpd_send_get_queue_song_pos(connection,
651 playlist_length(&c->playlist)) ||
652 !mpd_command_list_end(connection) ||
653 !mpd_response_next(connection))
654 return mpdclient_handle_error(c);
656 c->events |= MPD_IDLE_QUEUE;
658 struct mpd_status *status = mpdclient_recv_status(c);
659 if (status == NULL)
660 return false;
662 if (!mpd_response_next(connection))
663 return mpdclient_handle_error(c);
665 struct mpd_song *new_song = mpd_recv_song(connection);
666 if (!mpd_response_finish(connection) || new_song == NULL) {
667 if (new_song != NULL)
668 mpd_song_free(new_song);
670 return mpd_connection_clear_error(connection) ||
671 mpdclient_handle_error(c);
672 }
674 if (mpd_status_get_queue_length(status) == playlist_length(&c->playlist) + 1 &&
675 mpd_status_get_queue_version(status) == c->playlist.version + 1) {
676 /* the cheap route: match on the new playlist length
677 and its version, we can keep our local playlist
678 copy in sync */
679 c->playlist.version = mpd_status_get_queue_version(status);
681 /* the song we just received has the correct id;
682 append it to the local playlist */
683 playlist_append(&c->playlist, new_song);
684 }
686 mpd_song_free(new_song);
688 return true;
689 }
691 bool
692 mpdclient_cmd_delete(struct mpdclient *c, gint idx)
693 {
694 struct mpd_connection *connection = mpdclient_get_connection(c);
696 if (connection == NULL || c->status == NULL)
697 return false;
699 if (idx < 0 || (guint)idx >= playlist_length(&c->playlist))
700 return false;
702 const struct mpd_song *song = playlist_get(&c->playlist, idx);
704 /* send the delete command to mpd; at the same time, get the
705 new status (to verify the playlist id) */
707 if (!mpd_command_list_begin(connection, false) ||
708 !mpd_send_delete_id(connection, mpd_song_get_id(song)) ||
709 !mpd_send_status(connection) ||
710 !mpd_command_list_end(connection))
711 return mpdclient_handle_error(c);
713 c->events |= MPD_IDLE_QUEUE;
715 struct mpd_status *status = mpdclient_recv_status(c);
716 if (status == NULL)
717 return false;
719 if (!mpd_response_finish(connection))
720 return mpdclient_handle_error(c);
722 if (mpd_status_get_queue_length(status) == playlist_length(&c->playlist) - 1 &&
723 mpd_status_get_queue_version(status) == c->playlist.version + 1) {
724 /* the cheap route: match on the new playlist length
725 and its version, we can keep our local playlist
726 copy in sync */
727 c->playlist.version = mpd_status_get_queue_version(status);
729 /* remove the song from the local playlist */
730 playlist_remove(&c->playlist, idx);
732 /* remove references to the song */
733 if (c->song == song)
734 c->song = NULL;
735 }
737 return true;
738 }
740 bool
741 mpdclient_cmd_delete_range(struct mpdclient *c, unsigned start, unsigned end)
742 {
743 if (end == start + 1)
744 /* if that's not really a range, we choose to use the
745 safer "deleteid" version */
746 return mpdclient_cmd_delete(c, start);
748 struct mpd_connection *connection = mpdclient_get_connection(c);
749 if (connection == NULL)
750 return false;
752 /* send the delete command to mpd; at the same time, get the
753 new status (to verify the playlist id) */
755 if (!mpd_command_list_begin(connection, false) ||
756 !mpd_send_delete_range(connection, start, end) ||
757 !mpd_send_status(connection) ||
758 !mpd_command_list_end(connection))
759 return mpdclient_handle_error(c);
761 c->events |= MPD_IDLE_QUEUE;
763 struct mpd_status *status = mpdclient_recv_status(c);
764 if (status == NULL)
765 return false;
767 if (!mpd_response_finish(connection))
768 return mpdclient_handle_error(c);
770 if (mpd_status_get_queue_length(status) == playlist_length(&c->playlist) - (end - start) &&
771 mpd_status_get_queue_version(status) == c->playlist.version + 1) {
772 /* the cheap route: match on the new playlist length
773 and its version, we can keep our local playlist
774 copy in sync */
775 c->playlist.version = mpd_status_get_queue_version(status);
777 /* remove the song from the local playlist */
778 while (end > start) {
779 --end;
781 /* remove references to the song */
782 if (c->song == playlist_get(&c->playlist, end))
783 c->song = NULL;
785 playlist_remove(&c->playlist, end);
786 }
787 }
789 return true;
790 }
792 bool
793 mpdclient_cmd_move(struct mpdclient *c, unsigned dest_pos, unsigned src_pos)
794 {
795 if (dest_pos == src_pos)
796 return true;
798 struct mpd_connection *connection = mpdclient_get_connection(c);
799 if (connection == NULL)
800 return false;
802 /* send the "move" command to MPD; at the same time, get the
803 new status (to verify the playlist id) */
805 if (!mpd_command_list_begin(connection, false) ||
806 !mpd_send_move(connection, src_pos, dest_pos) ||
807 !mpd_send_status(connection) ||
808 !mpd_command_list_end(connection))
809 return mpdclient_handle_error(c);
811 c->events |= MPD_IDLE_QUEUE;
813 struct mpd_status *status = mpdclient_recv_status(c);
814 if (status == NULL)
815 return false;
817 if (!mpd_response_finish(connection))
818 return mpdclient_handle_error(c);
820 if (mpd_status_get_queue_length(status) == playlist_length(&c->playlist) &&
821 mpd_status_get_queue_version(status) == c->playlist.version + 1) {
822 /* the cheap route: match on the new playlist length
823 and its version, we can keep our local playlist
824 copy in sync */
825 c->playlist.version = mpd_status_get_queue_version(status);
827 /* swap songs in the local playlist */
828 playlist_move(&c->playlist, dest_pos, src_pos);
829 }
831 return true;
832 }
834 /* The client-to-client protocol (MPD 0.17.0) */
836 bool
837 mpdclient_cmd_subscribe(struct mpdclient *c, const char *channel)
838 {
839 struct mpd_connection *connection = mpdclient_get_connection(c);
841 if (connection == NULL)
842 return false;
844 if (!mpd_send_subscribe(connection, channel))
845 return mpdclient_handle_error(c);
847 return mpdclient_finish_command(c);
848 }
850 bool
851 mpdclient_cmd_unsubscribe(struct mpdclient *c, const char *channel)
852 {
853 struct mpd_connection *connection = mpdclient_get_connection(c);
854 if (connection == NULL)
855 return false;
857 if (!mpd_send_unsubscribe(connection, channel))
858 return mpdclient_handle_error(c);
860 return mpdclient_finish_command(c);
861 }
863 bool
864 mpdclient_cmd_send_message(struct mpdclient *c, const char *channel,
865 const char *text)
866 {
867 struct mpd_connection *connection = mpdclient_get_connection(c);
868 if (connection == NULL)
869 return false;
871 if (!mpd_send_send_message(connection, channel, text))
872 return mpdclient_handle_error(c);
874 return mpdclient_finish_command(c);
875 }
877 bool
878 mpdclient_send_read_messages(struct mpdclient *c)
879 {
880 struct mpd_connection *connection = mpdclient_get_connection(c);
881 if (connection == NULL)
882 return false;
884 return mpd_send_read_messages(connection)?
885 true : mpdclient_handle_error(c);
886 }
888 struct mpd_message *
889 mpdclient_recv_message(struct mpdclient *c)
890 {
891 struct mpd_connection *connection = mpdclient_get_connection(c);
892 if (connection == NULL)
893 return false;
895 struct mpd_message *message = mpd_recv_message(connection);
896 if (message == NULL &&
897 mpd_connection_get_error(connection) != MPD_ERROR_SUCCESS)
898 mpdclient_handle_error(c);
900 return message;
901 }
903 /****************************************************************************/
904 /*** Playlist management functions ******************************************/
905 /****************************************************************************/
907 /* update playlist */
908 bool
909 mpdclient_playlist_update(struct mpdclient *c)
910 {
911 struct mpd_connection *connection = mpdclient_get_connection(c);
912 if (connection == NULL)
913 return false;
915 playlist_clear(&c->playlist);
917 mpd_send_list_queue_meta(connection);
919 struct mpd_entity *entity;
920 while ((entity = mpd_recv_entity(connection))) {
921 if (mpd_entity_get_type(entity) == MPD_ENTITY_TYPE_SONG)
922 playlist_append(&c->playlist, mpd_entity_get_song(entity));
924 mpd_entity_free(entity);
925 }
927 c->playlist.version = mpd_status_get_queue_version(c->status);
928 c->song = NULL;
930 return mpdclient_finish_command(c);
931 }
933 /* update playlist (plchanges) */
934 bool
935 mpdclient_playlist_update_changes(struct mpdclient *c)
936 {
937 struct mpd_connection *connection = mpdclient_get_connection(c);
939 if (connection == NULL)
940 return false;
942 mpd_send_queue_changes_meta(connection, c->playlist.version);
944 struct mpd_song *song;
945 while ((song = mpd_recv_song(connection)) != NULL) {
946 int pos = mpd_song_get_pos(song);
948 if (pos >= 0 && (guint)pos < c->playlist.list->len) {
949 /* update song */
950 playlist_replace(&c->playlist, pos, song);
951 } else {
952 /* add a new song */
953 playlist_append(&c->playlist, song);
954 }
956 mpd_song_free(song);
957 }
959 /* remove trailing songs */
961 unsigned length = mpd_status_get_queue_length(c->status);
962 while (length < c->playlist.list->len) {
963 guint pos = c->playlist.list->len - 1;
965 /* Remove the last playlist entry */
966 playlist_remove(&c->playlist, pos);
967 }
969 c->song = NULL;
970 c->playlist.version = mpd_status_get_queue_version(c->status);
972 return mpdclient_finish_command(c);
973 }
976 /****************************************************************************/
977 /*** Filelist functions *****************************************************/
978 /****************************************************************************/
980 bool
981 mpdclient_filelist_add_all(struct mpdclient *c, struct filelist *fl)
982 {
983 struct mpd_connection *connection = mpdclient_get_connection(c);
984 if (connection == NULL)
985 return false;
987 if (filelist_is_empty(fl))
988 return true;
990 mpd_command_list_begin(connection, false);
992 for (unsigned i = 0; i < filelist_length(fl); ++i) {
993 struct filelist_entry *entry = filelist_get(fl, i);
994 struct mpd_entity *entity = entry->entity;
996 if (entity != NULL &&
997 mpd_entity_get_type(entity) == MPD_ENTITY_TYPE_SONG) {
998 const struct mpd_song *song =
999 mpd_entity_get_song(entity);
1001 mpd_send_add(connection, mpd_song_get_uri(song));
1002 }
1003 }
1005 mpd_command_list_end(connection);
1006 return mpdclient_finish_command(c);
1007 }