src/mpdclient.c

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2009 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 */
  19
  20 #include "mpdclient.h"
  21 #include "filelist.h"
  22 #include "screen_client.h"
  23 #include "config.h"
  24 #include "options.h"
  25 #include "strfsong.h"
  26 #include "utils.h"
  27
  28 #include <mpd/client.h>
  29
  30 #include <stdlib.h>
  31 #include <unistd.h>
  32 #include <time.h>
  33 #include <string.h>
  34
  35 #undef  ENABLE_FANCY_PLAYLIST_MANAGMENT_CMD_ADD /* broken with song id's */
  36 #define ENABLE_FANCY_PLAYLIST_MANAGMENT_CMD_DELETE
  37 #define ENABLE_FANCY_PLAYLIST_MANAGMENT_CMD_MOVE
  38
  39 #define BUFSIZE 1024
  40
  41 static bool
  42 MPD_ERROR(const struct mpdclient *client)
  43 {
  44         return client->connection == NULL ||
  45                 mpd_connection_get_error(client->connection) != MPD_ERROR_SUCCESS;
  46 }
  47
  48 /* filelist sorting functions */
  49 static gint
  50 compare_filelistentry(gconstpointer filelist_entry1,
  51                           gconstpointer filelist_entry2)
  52 {
  53         const struct mpd_entity *e1, *e2;
  54         int n = 0;
  55
  56         e1 = ((const struct filelist_entry *)filelist_entry1)->entity;
  57         e2 = ((const struct filelist_entry *)filelist_entry2)->entity;
  58
  59         if (e1 != NULL && e2 != NULL &&
  60             mpd_entity_get_type(e1) == mpd_entity_get_type(e2)) {
  61                 switch (mpd_entity_get_type(e1)) {
  62                 case MPD_ENTITY_TYPE_UNKNOWN:
  63                         break;
  64                 case MPD_ENTITY_TYPE_DIRECTORY:
  65                         n = g_utf8_collate(mpd_directory_get_path(mpd_entity_get_directory(e1)),
  66                                            mpd_directory_get_path(mpd_entity_get_directory(e2)));
  67                         break;
  68                 case MPD_ENTITY_TYPE_SONG:
  69                         break;
  70                 case MPD_ENTITY_TYPE_PLAYLIST:
  71                         n = g_utf8_collate(mpd_playlist_get_path(mpd_entity_get_playlist(e1)),
  72                                            mpd_playlist_get_path(mpd_entity_get_playlist(e2)));
  73                 }
  74         }
  75         return n;
  76 }
  77
  78 /* sort by list-format */
  79 gint
  80 compare_filelistentry_format(gconstpointer filelist_entry1,
  81                              gconstpointer filelist_entry2)
  82 {
  83         const struct mpd_entity *e1, *e2;
  84         char key1[BUFSIZE], key2[BUFSIZE];
  85         int n = 0;
  86
  87         e1 = ((const struct filelist_entry *)filelist_entry1)->entity;
  88         e2 = ((const struct filelist_entry *)filelist_entry2)->entity;
  89
  90         if (e1 && e2 &&
  91             mpd_entity_get_type(e1) == MPD_ENTITY_TYPE_SONG &&
  92             mpd_entity_get_type(e2) == MPD_ENTITY_TYPE_SONG) {
  93                 strfsong(key1, BUFSIZE, options.list_format, mpd_entity_get_song(e1));
  94                 strfsong(key2, BUFSIZE, options.list_format, mpd_entity_get_song(e2));
  95                 n = strcmp(key1,key2);
  96         }
  97
  98         return n;
  99 }
 100
 101
 102 /****************************************************************************/
 103 /*** mpdclient functions ****************************************************/
 104 /****************************************************************************/
 105
 106 gint
 107 mpdclient_handle_error(struct mpdclient *c)
 108 {
 109         enum mpd_error error = mpd_connection_get_error(c->connection);
 110
 111         assert(error != MPD_ERROR_SUCCESS);
 112
 113         if (error == MPD_ERROR_SERVER &&
 114             mpd_connection_get_server_error(c->connection) == MPD_SERVER_ERROR_PERMISSION &&
 115             screen_auth(c))
 116                 return 0;
 117
 118         if (error == MPD_ERROR_SERVER)
 119                 error = error | (mpd_connection_get_server_error(c->connection) << 8);
 120
 121         for (GList *list = c->error_callbacks; list != NULL;
 122              list = list->next) {
 123                 mpdc_error_cb_t cb = list->data;
 124                 cb(c, error, mpd_connection_get_error_message(c->connection));
 125         }
 126
 127         if (!mpd_connection_clear_error(c->connection))
 128                 mpdclient_disconnect(c);
 129
 130         return error;
 131 }
 132
 133 static gint
 134 mpdclient_finish_command(struct mpdclient *c)
 135 {
 136         return mpd_response_finish(c->connection)
 137                 ? 0 : mpdclient_handle_error(c);
 138 }
 139
 140 struct mpdclient *
 141 mpdclient_new(void)
 142 {
 143         struct mpdclient *c;
 144
 145         c = g_new0(struct mpdclient, 1);
 146         playlist_init(&c->playlist);
 147         c->volume = -1;
 148
 149         return c;
 150 }
 151
 152 void
 153 mpdclient_free(struct mpdclient *c)
 154 {
 155         mpdclient_disconnect(c);
 156
 157         mpdclient_playlist_free(&c->playlist);
 158
 159         g_list_free(c->error_callbacks);
 160         g_list_free(c->playlist_callbacks);
 161         g_list_free(c->browse_callbacks);
 162         g_free(c);
 163 }
 164
 165 void
 166 mpdclient_disconnect(struct mpdclient *c)
 167 {
 168         if (c->connection)
 169                 mpd_connection_free(c->connection);
 170         c->connection = NULL;
 171
 172         if (c->status)
 173                 mpd_status_free(c->status);
 174         c->status = NULL;
 175
 176         playlist_clear(&c->playlist);
 177
 178         if (c->song)
 179                 c->song = NULL;
 180 }
 181
 182 bool
 183 mpdclient_connect(struct mpdclient *c,
 184                   const gchar *host,
 185                   gint port,
 186                   gfloat _timeout,
 187                   const gchar *password)
 188 {
 189         /* close any open connection */
 190         if( c->connection )
 191                 mpdclient_disconnect(c);
 192
 193         /* connect to MPD */
 194         c->connection = mpd_connection_new(host, port, _timeout * 1000);
 195         if (c->connection == NULL)
 196                 g_error("Out of memory");
 197
 198         if (mpd_connection_get_error(c->connection) != MPD_ERROR_SUCCESS) {
 199                 mpdclient_handle_error(c);
 200                 mpdclient_disconnect(c);
 201                 return false;
 202         }
 203
 204         /* send password */
 205         if (password != NULL && !mpd_run_password(c->connection, password)) {
 206                 mpdclient_handle_error(c);
 207                 mpdclient_disconnect(c);
 208                 return false;
 209         }
 210
 211         return true;
 212 }
 213
 214 bool
 215 mpdclient_update(struct mpdclient *c)
 216 {
 217         bool retval;
 218
 219         c->volume = -1;
 220
 221         if (MPD_ERROR(c))
 222                 return false;
 223
 224         /* free the old status */
 225         if (c->status)
 226                 mpd_status_free(c->status);
 227
 228         /* retrieve new status */
 229         c->status = mpd_run_status(c->connection);
 230         if (c->status == NULL)
 231                 return mpdclient_handle_error(c) == 0;
 232
 233         if (c->update_id > 0 &&
 234             c->update_id != mpd_status_get_update_id(c->status))
 235                 mpdclient_browse_callback(c, BROWSE_DB_UPDATED, NULL);
 236
 237         c->update_id = mpd_status_get_update_id(c->status);
 238         c->volume = mpd_status_get_volume(c->status);
 239
 240         /* check if the playlist needs an update */
 241         if (c->playlist.id != mpd_status_get_queue_version(c->status)) {
 242                 if (!playlist_is_empty(&c->playlist))
 243                         retval = mpdclient_playlist_update_changes(c);
 244                 else
 245                         retval = mpdclient_playlist_update(c);
 246         } else
 247                 retval = true;
 248
 249         /* update the current song */
 250         if (!c->song || mpd_status_get_song_id(c->status)) {
 251                 c->song = playlist_get_song(&c->playlist,
 252                                             mpd_status_get_song_pos(c->status));
 253         }
 254
 255         return retval;
 256 }
 257
 258
 259 /****************************************************************************/
 260 /*** MPD Commands  **********************************************************/
 261 /****************************************************************************/
 262
 263 gint
 264 mpdclient_cmd_play(struct mpdclient *c, gint idx)
 265 {
 266         const struct mpd_song *song = playlist_get_song(&c->playlist, idx);
 267
 268         if (MPD_ERROR(c))
 269                 return -1;
 270
 271         if (song)
 272                 mpd_send_play_id(c->connection, mpd_song_get_id(song));
 273         else
 274                 mpd_send_play(c->connection);
 275
 276         return mpdclient_finish_command(c);
 277 }
 278
 279 gint
 280 mpdclient_cmd_crop(struct mpdclient *c)
 281 {
 282         struct mpd_status *status;
 283         bool playing;
 284         int length, current;
 285
 286         if (MPD_ERROR(c))
 287                 return -1;
 288
 289         status = mpd_run_status(c->connection);
 290         if (status == NULL)
 291                 return mpdclient_handle_error(c);
 292
 293         playing = mpd_status_get_state(status) == MPD_STATE_PLAY ||
 294                 mpd_status_get_state(status) == MPD_STATE_PAUSE;
 295         length = mpd_status_get_queue_length(status);
 296         current = mpd_status_get_song_pos(status);
 297
 298         mpd_status_free(status);
 299
 300         if (!playing || length < 2)
 301                 return 0;
 302
 303         mpd_command_list_begin(c->connection, false);
 304
 305         while (--length >= 0)
 306                 if (length != current)
 307                         mpd_send_delete(c->connection, length);
 308
 309         mpd_command_list_end(c->connection);
 310
 311         return mpdclient_finish_command(c);
 312 }
 313
 314 gint
 315 mpdclient_cmd_shuffle_range(struct mpdclient *c, guint start, guint end)
 316 {
 317         mpd_send_shuffle_range(c->connection, start, end);
 318         return mpdclient_finish_command(c);
 319 }
 320
 321 gint
 322 mpdclient_cmd_clear(struct mpdclient *c)
 323 {
 324         gint retval = 0;
 325
 326         if (MPD_ERROR(c))
 327                 return -1;
 328
 329         mpd_send_clear(c->connection);
 330         retval = mpdclient_finish_command(c);
 331         /* call playlist updated callback */
 332         mpdclient_playlist_callback(c, PLAYLIST_EVENT_CLEAR, NULL);
 333         return retval;
 334 }
 335
 336 gint
 337 mpdclient_cmd_volume(struct mpdclient *c, gint value)
 338 {
 339         if (MPD_ERROR(c))
 340                 return -1;
 341
 342         mpd_send_set_volume(c->connection, value);
 343         return mpdclient_finish_command(c);
 344 }
 345
 346 gint mpdclient_cmd_volume_up(struct mpdclient *c)
 347 {
 348         if (MPD_ERROR(c))
 349                 return -1;
 350
 351         if (c->status == NULL ||
 352             mpd_status_get_volume(c->status) == -1)
 353                 return 0;
 354
 355         if (c->volume < 0)
 356                 c->volume = mpd_status_get_volume(c->status);
 357
 358         if (c->volume >= 100)
 359                 return 0;
 360
 361         return mpdclient_cmd_volume(c, ++c->volume);
 362 }
 363
 364 gint mpdclient_cmd_volume_down(struct mpdclient *c)
 365 {
 366         if (MPD_ERROR(c))
 367                 return -1;
 368
 369         if (c->status == NULL || mpd_status_get_volume(c->status) < 0)
 370                 return 0;
 371
 372         if (c->volume < 0)
 373                 c->volume = mpd_status_get_volume(c->status);
 374
 375         if (c->volume <= 0)
 376                 return 0;
 377
 378         return mpdclient_cmd_volume(c, --c->volume);
 379 }
 380
 381 gint
 382 mpdclient_cmd_add_path(struct mpdclient *c, const gchar *path_utf8)
 383 {
 384         if (MPD_ERROR(c))
 385                 return -1;
 386
 387         mpd_send_add(c->connection, path_utf8);
 388         return mpdclient_finish_command(c);
 389 }
 390
 391 gint
 392 mpdclient_cmd_add(struct mpdclient *c, const struct mpd_song *song)
 393 {
 394         gint retval = 0;
 395
 396         if (MPD_ERROR(c))
 397                 return -1;
 398
 399         if (song == NULL)
 400                 return -1;
 401
 402         /* send the add command to mpd */
 403         mpd_send_add(c->connection, mpd_song_get_uri(song));
 404         if( (retval=mpdclient_finish_command(c)) )
 405                 return retval;
 406
 407 #ifdef ENABLE_FANCY_PLAYLIST_MANAGMENT_CMD_ADD
 408         /* add the song to playlist */
 409         playlist_append(&c->playlist, song);
 410
 411         /* increment the playlist id, so we don't retrieve a new playlist */
 412         c->playlist.id++;
 413
 414         /* call playlist updated callback */
 415         mpdclient_playlist_callback(c, PLAYLIST_EVENT_ADD, (gpointer) song);
 416 #endif
 417
 418         return 0;
 419 }
 420
 421 gint
 422 mpdclient_cmd_delete(struct mpdclient *c, gint idx)
 423 {
 424         gint retval = 0;
 425         struct mpd_song *song;
 426
 427         if (MPD_ERROR(c))
 428                 return -1;
 429
 430         if (idx < 0 || (guint)idx >= playlist_length(&c->playlist))
 431                 return -1;
 432
 433         song = playlist_get(&c->playlist, idx);
 434
 435         /* send the delete command to mpd */
 436         mpd_send_delete_id(c->connection, mpd_song_get_id(song));
 437         if( (retval=mpdclient_finish_command(c)) )
 438                 return retval;
 439
 440 #ifdef ENABLE_FANCY_PLAYLIST_MANAGMENT_CMD_DELETE
 441         /* increment the playlist id, so we don't retrieve a new playlist */
 442         c->playlist.id++;
 443
 444         /* remove the song from the playlist */
 445         playlist_remove_reuse(&c->playlist, idx);
 446
 447         /* call playlist updated callback */
 448         mpdclient_playlist_callback(c, PLAYLIST_EVENT_DELETE, (gpointer) song);
 449
 450         /* remove references to the song */
 451         if (c->song == song)
 452                 c->song = NULL;
 453
 454         mpd_song_free(song);
 455 #endif
 456
 457         return 0;
 458 }
 459
 460 gint
 461 mpdclient_cmd_move(struct mpdclient *c, gint old_index, gint new_index)
 462 {
 463         gint n;
 464         struct mpd_song *song1, *song2;
 465
 466         if (MPD_ERROR(c))
 467                 return -1;
 468
 469         if (old_index == new_index || new_index < 0 ||
 470             (guint)new_index >= c->playlist.list->len)
 471                 return -1;
 472
 473         song1 = playlist_get(&c->playlist, old_index);
 474         song2 = playlist_get(&c->playlist, new_index);
 475
 476         /* send the move command to mpd */
 477         mpd_send_swap_id(c->connection,
 478                          mpd_song_get_id(song1), mpd_song_get_id(song2));
 479         if( (n=mpdclient_finish_command(c)) )
 480                 return n;
 481
 482 #ifdef ENABLE_FANCY_PLAYLIST_MANAGMENT_CMD_MOVE
 483         /* update the playlist */
 484         playlist_swap(&c->playlist, old_index, new_index);
 485
 486         /* increment the playlist id, so we don't retrieve a new playlist */
 487         c->playlist.id++;
 488 #endif
 489
 490         /* call playlist updated callback */
 491         mpdclient_playlist_callback(c, PLAYLIST_EVENT_MOVE, (gpointer) &new_index);
 492
 493         return 0;
 494 }
 495
 496 gint
 497 mpdclient_cmd_save_playlist(struct mpdclient *c, const gchar *filename_utf8)
 498 {
 499         gint retval = 0;
 500
 501         if (MPD_ERROR(c))
 502                 return -1;
 503
 504         mpd_send_save(c->connection, filename_utf8);
 505         if ((retval = mpdclient_finish_command(c)) == 0)
 506                 mpdclient_browse_callback(c, BROWSE_PLAYLIST_SAVED, NULL);
 507         return retval;
 508 }
 509
 510 gint
 511 mpdclient_cmd_load_playlist(struct mpdclient *c, const gchar *filename_utf8)
 512 {
 513         if (MPD_ERROR(c))
 514                 return -1;
 515
 516         mpd_send_load(c->connection, filename_utf8);
 517         return mpdclient_finish_command(c);
 518 }
 519
 520 gint
 521 mpdclient_cmd_delete_playlist(struct mpdclient *c, const gchar *filename_utf8)
 522 {
 523         gint retval = 0;
 524
 525         if (MPD_ERROR(c))
 526                 return -1;
 527
 528         mpd_send_rm(c->connection, filename_utf8);
 529         if ((retval = mpdclient_finish_command(c)) == 0)
 530                 mpdclient_browse_callback(c, BROWSE_PLAYLIST_DELETED, NULL);
 531         return retval;
 532 }
 533
 534
 535 /****************************************************************************/
 536 /*** Callback management functions ******************************************/
 537 /****************************************************************************/
 538
 539 static void
 540 do_list_callbacks(struct mpdclient *c, GList *list, gint event, gpointer data)
 541 {
 542         while (list) {
 543                 mpdc_list_cb_t fn = list->data;
 544
 545                 fn(c, event, data);
 546                 list = list->next;
 547         }
 548 }
 549
 550 void
 551 mpdclient_playlist_callback(struct mpdclient *c, int event, gpointer data)
 552 {
 553         do_list_callbacks(c, c->playlist_callbacks, event, data);
 554 }
 555
 556 void
 557 mpdclient_install_playlist_callback(struct mpdclient *c,mpdc_list_cb_t cb)
 558 {
 559         c->playlist_callbacks = g_list_append(c->playlist_callbacks, cb);
 560 }
 561
 562 void
 563 mpdclient_remove_playlist_callback(struct mpdclient *c, mpdc_list_cb_t cb)
 564 {
 565         c->playlist_callbacks = g_list_remove(c->playlist_callbacks, cb);
 566 }
 567
 568 void
 569 mpdclient_browse_callback(struct mpdclient *c, int event, gpointer data)
 570 {
 571         do_list_callbacks(c, c->browse_callbacks, event, data);
 572 }
 573
 574
 575 void
 576 mpdclient_install_browse_callback(struct mpdclient *c,mpdc_list_cb_t cb)
 577 {
 578         c->browse_callbacks = g_list_append(c->browse_callbacks, cb);
 579 }
 580
 581 void
 582 mpdclient_remove_browse_callback(struct mpdclient *c, mpdc_list_cb_t cb)
 583 {
 584         c->browse_callbacks = g_list_remove(c->browse_callbacks, cb);
 585 }
 586
 587 void
 588 mpdclient_install_error_callback(struct mpdclient *c, mpdc_error_cb_t cb)
 589 {
 590         c->error_callbacks = g_list_append(c->error_callbacks, cb);
 591 }
 592
 593 void
 594 mpdclient_remove_error_callback(struct mpdclient *c, mpdc_error_cb_t cb)
 595 {
 596         c->error_callbacks = g_list_remove(c->error_callbacks, cb);
 597 }
 598
 599
 600 /****************************************************************************/
 601 /*** Playlist management functions ******************************************/
 602 /****************************************************************************/
 603
 604 /* update playlist */
 605 bool
 606 mpdclient_playlist_update(struct mpdclient *c)
 607 {
 608         struct mpd_entity *entity;
 609
 610         if (MPD_ERROR(c))
 611                 return false;
 612
 613         playlist_clear(&c->playlist);
 614
 615         mpd_send_list_queue_meta(c->connection);
 616         while ((entity = mpd_recv_entity(c->connection))) {
 617                 if (mpd_entity_get_type(entity) == MPD_ENTITY_TYPE_SONG)
 618                         playlist_append(&c->playlist, mpd_entity_get_song(entity));
 619
 620                 mpd_entity_free(entity);
 621         }
 622
 623         c->playlist.id = mpd_status_get_queue_version(c->status);
 624         c->song = NULL;
 625
 626         /* call playlist updated callbacks */
 627         mpdclient_playlist_callback(c, PLAYLIST_EVENT_UPDATED, NULL);
 628
 629         return mpdclient_finish_command(c) == 0;
 630 }
 631
 632 /* update playlist (plchanges) */
 633 bool
 634 mpdclient_playlist_update_changes(struct mpdclient *c)
 635 {
 636         struct mpd_song *song;
 637         guint length;
 638
 639         if (MPD_ERROR(c))
 640                 return false;
 641
 642         mpd_send_queue_changes_meta(c->connection, c->playlist.id);
 643
 644         while ((song = mpd_recv_song(c->connection)) != NULL) {
 645                 int pos = mpd_song_get_pos(song);
 646
 647                 if (pos >= 0 && (guint)pos < c->playlist.list->len) {
 648                         /* update song */
 649                         playlist_replace(&c->playlist, pos, song);
 650                 } else {
 651                         /* add a new song */
 652                         playlist_append(&c->playlist, song);
 653                 }
 654
 655                 mpd_song_free(song);
 656         }
 657
 658         /* remove trailing songs */
 659
 660         length = mpd_status_get_queue_length(c->status);
 661         while (length < c->playlist.list->len) {
 662                 guint pos = c->playlist.list->len - 1;
 663
 664                 /* Remove the last playlist entry */
 665                 playlist_remove(&c->playlist, pos);
 666         }
 667
 668         c->song = NULL;
 669         c->playlist.id = mpd_status_get_queue_version(c->status);
 670
 671         mpdclient_playlist_callback(c, PLAYLIST_EVENT_UPDATED, NULL);
 672
 673         return mpdclient_finish_command(c) == 0;
 674 }
 675
 676
 677 /****************************************************************************/
 678 /*** Filelist functions *****************************************************/
 679 /****************************************************************************/
 680
 681 struct filelist *
 682 mpdclient_filelist_get(struct mpdclient *c, const gchar *path)
 683 {
 684         struct filelist *filelist;
 685         struct mpd_entity *entity;
 686
 687         if (MPD_ERROR(c))
 688                 return NULL;
 689
 690         mpd_send_list_meta(c->connection, path);
 691         filelist = filelist_new();
 692         if (path && path[0] && strcmp(path, "/"))
 693                 /* add a dummy entry for ./.. */
 694                 filelist_append(filelist, NULL);
 695
 696         while ((entity = mpd_recv_entity(c->connection)) != NULL)
 697                 filelist_append(filelist, entity);
 698
 699         /* If there's an error, ignore it.  We'll return an empty filelist. */
 700         mpdclient_finish_command(c);
 701
 702         filelist_sort_dir_play(filelist, compare_filelistentry);
 703
 704         return filelist;
 705 }
 706
 707 static struct filelist *
 708 mpdclient_recv_filelist_response(struct mpdclient *c)
 709 {
 710         struct filelist *filelist;
 711         struct mpd_entity *entity;
 712
 713         filelist = filelist_new();
 714
 715         while ((entity = mpd_recv_entity(c->connection)) != NULL)
 716                 filelist_append(filelist, entity);
 717
 718         if (mpdclient_finish_command(c)) {
 719                 filelist_free(filelist);
 720                 return NULL;
 721         }
 722
 723         return filelist;
 724 }
 725
 726 struct filelist *
 727 mpdclient_filelist_search(struct mpdclient *c,
 728                           int exact_match,
 729                           enum mpd_tag_type tag,
 730                           gchar *filter_utf8)
 731 {
 732         if (MPD_ERROR(c))
 733                 return NULL;
 734
 735         mpd_search_db_songs(c->connection, exact_match);
 736         mpd_search_add_tag_constraint(c->connection, MPD_OPERATOR_DEFAULT,
 737                                       tag, filter_utf8);
 738         mpd_search_commit(c->connection);
 739
 740         return mpdclient_recv_filelist_response(c);
 741 }
 742
 743 int
 744 mpdclient_filelist_add_all(struct mpdclient *c, struct filelist *fl)
 745 {
 746         guint i;
 747
 748         if (MPD_ERROR(c))
 749                 return -1;
 750
 751         if (filelist_is_empty(fl))
 752                 return 0;
 753
 754         mpd_command_list_begin(c->connection, false);
 755
 756         for (i = 0; i < filelist_length(fl); ++i) {
 757                 struct filelist_entry *entry = filelist_get(fl, i);
 758                 struct mpd_entity *entity  = entry->entity;
 759
 760                 if (entity != NULL &&
 761                     mpd_entity_get_type(entity) == MPD_ENTITY_TYPE_SONG) {
 762                         const struct mpd_song *song =
 763                                 mpd_entity_get_song(entity);
 764                         const char *uri = mpd_song_get_uri(song);
 765
 766                         if (uri != NULL)
 767                                 mpd_send_add(c->connection, uri);
 768                 }
 769         }
 770
 771         mpd_command_list_end(c->connection);
 772         return mpdclient_finish_command(c);
 773 }
 774
 775 GList *
 776 mpdclient_get_artists(struct mpdclient *c)
 777 {
 778         GList *list = NULL;
 779         struct mpd_pair *pair;
 780
 781         if (MPD_ERROR(c))
 782                return NULL;
 783
 784         mpd_search_db_tags(c->connection, MPD_TAG_ARTIST);
 785         mpd_search_commit(c->connection);
 786
 787         while ((pair = mpd_recv_pair_tag(c->connection,
 788                                          MPD_TAG_ARTIST)) != NULL) {
 789                 list = g_list_append(list, g_strdup(pair->value));
 790                 mpd_return_pair(c->connection, pair);
 791         }
 792
 793         if (mpdclient_finish_command(c))
 794                 return string_list_free(list);
 795
 796         return list;
 797 }
 798
 799 GList *
 800 mpdclient_get_albums(struct mpdclient *c, const gchar *artist_utf8)
 801 {
 802         GList *list = NULL;
 803         struct mpd_pair *pair;
 804
 805         if (MPD_ERROR(c))
 806                return NULL;
 807
 808         mpd_search_db_tags(c->connection, MPD_TAG_ALBUM);
 809         if (artist_utf8 != NULL)
 810                 mpd_search_add_tag_constraint(c->connection,
 811                                               MPD_OPERATOR_DEFAULT,
 812                                               MPD_TAG_ARTIST, artist_utf8);
 813         mpd_search_commit(c->connection);
 814
 815         while ((pair = mpd_recv_pair_tag(c->connection,
 816                                          MPD_TAG_ALBUM)) != NULL) {
 817                 list = g_list_append(list, g_strdup(pair->value));
 818                 mpd_return_pair(c->connection, pair);
 819         }
 820
 821         if (mpdclient_finish_command(c))
 822                 return string_list_free(list);
 823
 824         return list;
 825 }