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         mpdclient_ui_error(mpd_connection_get_error_message(c->connection));
 122
 123         if (!mpd_connection_clear_error(c->connection))
 124                 mpdclient_disconnect(c);
 125
 126         return error;
 127 }
 128
 129 static gint
 130 mpdclient_finish_command(struct mpdclient *c)
 131 {
 132         return mpd_response_finish(c->connection)
 133                 ? 0 : mpdclient_handle_error(c);
 134 }
 135
 136 struct mpdclient *
 137 mpdclient_new(void)
 138 {
 139         struct mpdclient *c;
 140
 141         c = g_new0(struct mpdclient, 1);
 142         playlist_init(&c->playlist);
 143         c->volume = -1;
 144         c->events = 0;
 145
 146         return c;
 147 }
 148
 149 void
 150 mpdclient_free(struct mpdclient *c)
 151 {
 152         mpdclient_disconnect(c);
 153
 154         mpdclient_playlist_free(&c->playlist);
 155
 156         g_list_free(c->playlist_callbacks);
 157         g_list_free(c->browse_callbacks);
 158         g_free(c);
 159 }
 160
 161 void
 162 mpdclient_disconnect(struct mpdclient *c)
 163 {
 164         if (c->connection)
 165                 mpd_connection_free(c->connection);
 166         c->connection = NULL;
 167
 168         if (c->status)
 169                 mpd_status_free(c->status);
 170         c->status = NULL;
 171
 172         playlist_clear(&c->playlist);
 173
 174         if (c->song)
 175                 c->song = NULL;
 176 }
 177
 178 bool
 179 mpdclient_connect(struct mpdclient *c,
 180                   const gchar *host,
 181                   gint port,
 182                   gfloat _timeout,
 183                   const gchar *password)
 184 {
 185         /* close any open connection */
 186         if( c->connection )
 187                 mpdclient_disconnect(c);
 188
 189         /* connect to MPD */
 190         c->connection = mpd_connection_new(host, port, _timeout * 1000);
 191         if (c->connection == NULL)
 192                 g_error("Out of memory");
 193
 194         if (mpd_connection_get_error(c->connection) != MPD_ERROR_SUCCESS) {
 195                 mpdclient_handle_error(c);
 196                 mpdclient_disconnect(c);
 197                 return false;
 198         }
 199
 200         /* send password */
 201         if (password != NULL && !mpd_run_password(c->connection, password)) {
 202                 mpdclient_handle_error(c);
 203                 mpdclient_disconnect(c);
 204                 return false;
 205         }
 206
 207         return true;
 208 }
 209
 210 bool
 211 mpdclient_update(struct mpdclient *c)
 212 {
 213         bool retval;
 214
 215         c->volume = -1;
 216
 217         if (MPD_ERROR(c))
 218                 return false;
 219
 220         /* always announce these options as long as we don't have real
 221            "idle" support */
 222         c->events |= MPD_IDLE_PLAYER|MPD_IDLE_OPTIONS;
 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 != mpd_status_get_update_id(c->status)) {
 234                 c->events |= MPD_IDLE_UPDATE;
 235
 236                 if (c->update_id > 0)
 237                         c->events |= MPD_IDLE_DATABASE;
 238         }
 239
 240         if (c->update_id > 0 &&
 241             c->update_id != mpd_status_get_update_id(c->status))
 242                 mpdclient_browse_callback(c, BROWSE_DB_UPDATED, NULL);
 243
 244         c->update_id = mpd_status_get_update_id(c->status);
 245
 246         if (c->volume != mpd_status_get_volume(c->status))
 247                 c->events |= MPD_IDLE_MIXER;
 248
 249         c->volume = mpd_status_get_volume(c->status);
 250
 251         /* check if the playlist needs an update */
 252         if (c->playlist.id != mpd_status_get_queue_version(c->status)) {
 253                 c->events |= MPD_IDLE_PLAYLIST;
 254
 255                 if (!playlist_is_empty(&c->playlist))
 256                         retval = mpdclient_playlist_update_changes(c);
 257                 else
 258                         retval = mpdclient_playlist_update(c);
 259         } else
 260                 retval = true;
 261
 262         /* update the current song */
 263         if (!c->song || mpd_status_get_song_id(c->status)) {
 264                 c->song = playlist_get_song(&c->playlist,
 265                                             mpd_status_get_song_pos(c->status));
 266         }
 267
 268         return retval;
 269 }
 270
 271
 272 /****************************************************************************/
 273 /*** MPD Commands  **********************************************************/
 274 /****************************************************************************/
 275
 276 gint
 277 mpdclient_cmd_play(struct mpdclient *c, gint idx)
 278 {
 279         const struct mpd_song *song = playlist_get_song(&c->playlist, idx);
 280
 281         if (MPD_ERROR(c))
 282                 return -1;
 283
 284         if (song)
 285                 mpd_send_play_id(c->connection, mpd_song_get_id(song));
 286         else
 287                 mpd_send_play(c->connection);
 288
 289         return mpdclient_finish_command(c);
 290 }
 291
 292 gint
 293 mpdclient_cmd_crop(struct mpdclient *c)
 294 {
 295         struct mpd_status *status;
 296         bool playing;
 297         int length, current;
 298
 299         if (MPD_ERROR(c))
 300                 return -1;
 301
 302         status = mpd_run_status(c->connection);
 303         if (status == NULL)
 304                 return mpdclient_handle_error(c);
 305
 306         playing = mpd_status_get_state(status) == MPD_STATE_PLAY ||
 307                 mpd_status_get_state(status) == MPD_STATE_PAUSE;
 308         length = mpd_status_get_queue_length(status);
 309         current = mpd_status_get_song_pos(status);
 310
 311         mpd_status_free(status);
 312
 313         if (!playing || length < 2)
 314                 return 0;
 315
 316         mpd_command_list_begin(c->connection, false);
 317
 318         while (--length >= 0)
 319                 if (length != current)
 320                         mpd_send_delete(c->connection, length);
 321
 322         mpd_command_list_end(c->connection);
 323
 324         return mpdclient_finish_command(c);
 325 }
 326
 327 gint
 328 mpdclient_cmd_shuffle_range(struct mpdclient *c, guint start, guint end)
 329 {
 330         mpd_send_shuffle_range(c->connection, start, end);
 331         return mpdclient_finish_command(c);
 332 }
 333
 334 gint
 335 mpdclient_cmd_clear(struct mpdclient *c)
 336 {
 337         gint retval = 0;
 338
 339         if (MPD_ERROR(c))
 340                 return -1;
 341
 342         mpd_send_clear(c->connection);
 343         retval = mpdclient_finish_command(c);
 344         /* call playlist updated callback */
 345         mpdclient_playlist_callback(c, PLAYLIST_EVENT_CLEAR, NULL);
 346         return retval;
 347 }
 348
 349 gint
 350 mpdclient_cmd_volume(struct mpdclient *c, gint value)
 351 {
 352         if (MPD_ERROR(c))
 353                 return -1;
 354
 355         mpd_send_set_volume(c->connection, value);
 356         return mpdclient_finish_command(c);
 357 }
 358
 359 gint mpdclient_cmd_volume_up(struct mpdclient *c)
 360 {
 361         if (MPD_ERROR(c))
 362                 return -1;
 363
 364         if (c->status == NULL ||
 365             mpd_status_get_volume(c->status) == -1)
 366                 return 0;
 367
 368         if (c->volume < 0)
 369                 c->volume = mpd_status_get_volume(c->status);
 370
 371         if (c->volume >= 100)
 372                 return 0;
 373
 374         return mpdclient_cmd_volume(c, ++c->volume);
 375 }
 376
 377 gint mpdclient_cmd_volume_down(struct mpdclient *c)
 378 {
 379         if (MPD_ERROR(c))
 380                 return -1;
 381
 382         if (c->status == NULL || mpd_status_get_volume(c->status) < 0)
 383                 return 0;
 384
 385         if (c->volume < 0)
 386                 c->volume = mpd_status_get_volume(c->status);
 387
 388         if (c->volume <= 0)
 389                 return 0;
 390
 391         return mpdclient_cmd_volume(c, --c->volume);
 392 }
 393
 394 gint
 395 mpdclient_cmd_add_path(struct mpdclient *c, const gchar *path_utf8)
 396 {
 397         if (MPD_ERROR(c))
 398                 return -1;
 399
 400         mpd_send_add(c->connection, path_utf8);
 401         return mpdclient_finish_command(c);
 402 }
 403
 404 gint
 405 mpdclient_cmd_add(struct mpdclient *c, const struct mpd_song *song)
 406 {
 407         gint retval = 0;
 408
 409         if (MPD_ERROR(c))
 410                 return -1;
 411
 412         if (song == NULL)
 413                 return -1;
 414
 415         /* send the add command to mpd */
 416         mpd_send_add(c->connection, mpd_song_get_uri(song));
 417         if( (retval=mpdclient_finish_command(c)) )
 418                 return retval;
 419
 420 #ifdef ENABLE_FANCY_PLAYLIST_MANAGMENT_CMD_ADD
 421         /* add the song to playlist */
 422         playlist_append(&c->playlist, song);
 423
 424         /* increment the playlist id, so we don't retrieve a new playlist */
 425         c->playlist.id++;
 426
 427         /* call playlist updated callback */
 428         mpdclient_playlist_callback(c, PLAYLIST_EVENT_ADD, (gpointer) song);
 429 #endif
 430
 431         return 0;
 432 }
 433
 434 gint
 435 mpdclient_cmd_delete(struct mpdclient *c, gint idx)
 436 {
 437         gint retval = 0;
 438         struct mpd_song *song;
 439
 440         if (MPD_ERROR(c))
 441                 return -1;
 442
 443         if (idx < 0 || (guint)idx >= playlist_length(&c->playlist))
 444                 return -1;
 445
 446         song = playlist_get(&c->playlist, idx);
 447
 448         /* send the delete command to mpd */
 449         mpd_send_delete_id(c->connection, mpd_song_get_id(song));
 450         if( (retval=mpdclient_finish_command(c)) )
 451                 return retval;
 452
 453 #ifdef ENABLE_FANCY_PLAYLIST_MANAGMENT_CMD_DELETE
 454         /* increment the playlist id, so we don't retrieve a new playlist */
 455         c->playlist.id++;
 456
 457         /* remove the song from the playlist */
 458         playlist_remove_reuse(&c->playlist, idx);
 459
 460         /* call playlist updated callback */
 461         mpdclient_playlist_callback(c, PLAYLIST_EVENT_DELETE, (gpointer) song);
 462
 463         /* remove references to the song */
 464         if (c->song == song)
 465                 c->song = NULL;
 466
 467         mpd_song_free(song);
 468 #endif
 469
 470         return 0;
 471 }
 472
 473 gint
 474 mpdclient_cmd_move(struct mpdclient *c, gint old_index, gint new_index)
 475 {
 476         gint n;
 477         struct mpd_song *song1, *song2;
 478
 479         if (MPD_ERROR(c))
 480                 return -1;
 481
 482         if (old_index == new_index || new_index < 0 ||
 483             (guint)new_index >= c->playlist.list->len)
 484                 return -1;
 485
 486         song1 = playlist_get(&c->playlist, old_index);
 487         song2 = playlist_get(&c->playlist, new_index);
 488
 489         /* send the move command to mpd */
 490         mpd_send_swap_id(c->connection,
 491                          mpd_song_get_id(song1), mpd_song_get_id(song2));
 492         if( (n=mpdclient_finish_command(c)) )
 493                 return n;
 494
 495 #ifdef ENABLE_FANCY_PLAYLIST_MANAGMENT_CMD_MOVE
 496         /* update the playlist */
 497         playlist_swap(&c->playlist, old_index, new_index);
 498
 499         /* increment the playlist id, so we don't retrieve a new playlist */
 500         c->playlist.id++;
 501 #endif
 502
 503         /* call playlist updated callback */
 504         mpdclient_playlist_callback(c, PLAYLIST_EVENT_MOVE, (gpointer) &new_index);
 505
 506         return 0;
 507 }
 508
 509 gint
 510 mpdclient_cmd_save_playlist(struct mpdclient *c, const gchar *filename_utf8)
 511 {
 512         gint retval = 0;
 513
 514         if (MPD_ERROR(c))
 515                 return -1;
 516
 517         mpd_send_save(c->connection, filename_utf8);
 518         if ((retval = mpdclient_finish_command(c)) == 0) {
 519                 mpdclient_browse_callback(c, BROWSE_PLAYLIST_SAVED, NULL);
 520                 c->events |= MPD_IDLE_STORED_PLAYLIST;
 521         }
 522
 523         return retval;
 524 }
 525
 526 gint
 527 mpdclient_cmd_load_playlist(struct mpdclient *c, const gchar *filename_utf8)
 528 {
 529         if (MPD_ERROR(c))
 530                 return -1;
 531
 532         mpd_send_load(c->connection, filename_utf8);
 533         return mpdclient_finish_command(c);
 534 }
 535
 536 gint
 537 mpdclient_cmd_delete_playlist(struct mpdclient *c, const gchar *filename_utf8)
 538 {
 539         gint retval = 0;
 540
 541         if (MPD_ERROR(c))
 542                 return -1;
 543
 544         mpd_send_rm(c->connection, filename_utf8);
 545         if ((retval = mpdclient_finish_command(c)) == 0) {
 546                 mpdclient_browse_callback(c, BROWSE_PLAYLIST_DELETED, NULL);
 547                 c->events |= MPD_IDLE_STORED_PLAYLIST;
 548         }
 549
 550         return retval;
 551 }
 552
 553
 554 /****************************************************************************/
 555 /*** Callback management functions ******************************************/
 556 /****************************************************************************/
 557
 558 static void
 559 do_list_callbacks(struct mpdclient *c, GList *list, gint event, gpointer data)
 560 {
 561         while (list) {
 562                 mpdc_list_cb_t fn = list->data;
 563
 564                 fn(c, event, data);
 565                 list = list->next;
 566         }
 567 }
 568
 569 void
 570 mpdclient_playlist_callback(struct mpdclient *c, int event, gpointer data)
 571 {
 572         do_list_callbacks(c, c->playlist_callbacks, event, data);
 573 }
 574
 575 void
 576 mpdclient_install_playlist_callback(struct mpdclient *c,mpdc_list_cb_t cb)
 577 {
 578         c->playlist_callbacks = g_list_append(c->playlist_callbacks, cb);
 579 }
 580
 581 void
 582 mpdclient_remove_playlist_callback(struct mpdclient *c, mpdc_list_cb_t cb)
 583 {
 584         c->playlist_callbacks = g_list_remove(c->playlist_callbacks, cb);
 585 }
 586
 587 void
 588 mpdclient_browse_callback(struct mpdclient *c, int event, gpointer data)
 589 {
 590         do_list_callbacks(c, c->browse_callbacks, event, data);
 591 }
 592
 593
 594 void
 595 mpdclient_install_browse_callback(struct mpdclient *c,mpdc_list_cb_t cb)
 596 {
 597         c->browse_callbacks = g_list_append(c->browse_callbacks, cb);
 598 }
 599
 600 void
 601 mpdclient_remove_browse_callback(struct mpdclient *c, mpdc_list_cb_t cb)
 602 {
 603         c->browse_callbacks = g_list_remove(c->browse_callbacks, cb);
 604 }
 605
 606
 607 /****************************************************************************/
 608 /*** Playlist management functions ******************************************/
 609 /****************************************************************************/
 610
 611 /* update playlist */
 612 bool
 613 mpdclient_playlist_update(struct mpdclient *c)
 614 {
 615         struct mpd_entity *entity;
 616
 617         if (MPD_ERROR(c))
 618                 return false;
 619
 620         playlist_clear(&c->playlist);
 621
 622         mpd_send_list_queue_meta(c->connection);
 623         while ((entity = mpd_recv_entity(c->connection))) {
 624                 if (mpd_entity_get_type(entity) == MPD_ENTITY_TYPE_SONG)
 625                         playlist_append(&c->playlist, mpd_entity_get_song(entity));
 626
 627                 mpd_entity_free(entity);
 628         }
 629
 630         c->playlist.id = mpd_status_get_queue_version(c->status);
 631         c->song = NULL;
 632
 633         /* call playlist updated callbacks */
 634         mpdclient_playlist_callback(c, PLAYLIST_EVENT_UPDATED, NULL);
 635
 636         return mpdclient_finish_command(c) == 0;
 637 }
 638
 639 /* update playlist (plchanges) */
 640 bool
 641 mpdclient_playlist_update_changes(struct mpdclient *c)
 642 {
 643         struct mpd_song *song;
 644         guint length;
 645
 646         if (MPD_ERROR(c))
 647                 return false;
 648
 649         mpd_send_queue_changes_meta(c->connection, c->playlist.id);
 650
 651         while ((song = mpd_recv_song(c->connection)) != NULL) {
 652                 int pos = mpd_song_get_pos(song);
 653
 654                 if (pos >= 0 && (guint)pos < c->playlist.list->len) {
 655                         /* update song */
 656                         playlist_replace(&c->playlist, pos, song);
 657                 } else {
 658                         /* add a new song */
 659                         playlist_append(&c->playlist, song);
 660                 }
 661
 662                 mpd_song_free(song);
 663         }
 664
 665         /* remove trailing songs */
 666
 667         length = mpd_status_get_queue_length(c->status);
 668         while (length < c->playlist.list->len) {
 669                 guint pos = c->playlist.list->len - 1;
 670
 671                 /* Remove the last playlist entry */
 672                 playlist_remove(&c->playlist, pos);
 673         }
 674
 675         c->song = NULL;
 676         c->playlist.id = mpd_status_get_queue_version(c->status);
 677
 678         mpdclient_playlist_callback(c, PLAYLIST_EVENT_UPDATED, NULL);
 679
 680         return mpdclient_finish_command(c) == 0;
 681 }
 682
 683
 684 /****************************************************************************/
 685 /*** Filelist functions *****************************************************/
 686 /****************************************************************************/
 687
 688 struct filelist *
 689 mpdclient_filelist_get(struct mpdclient *c, const gchar *path)
 690 {
 691         struct filelist *filelist;
 692         struct mpd_entity *entity;
 693
 694         if (MPD_ERROR(c))
 695                 return NULL;
 696
 697         mpd_send_list_meta(c->connection, path);
 698         filelist = filelist_new();
 699
 700         while ((entity = mpd_recv_entity(c->connection)) != NULL)
 701                 filelist_append(filelist, entity);
 702
 703         if (mpdclient_finish_command(c)) {
 704                 filelist_free(filelist);
 705                 return NULL;
 706         }
 707
 708         filelist_sort_dir_play(filelist, compare_filelistentry);
 709
 710         return filelist;
 711 }
 712
 713 static struct filelist *
 714 mpdclient_recv_filelist_response(struct mpdclient *c)
 715 {
 716         struct filelist *filelist;
 717         struct mpd_entity *entity;
 718
 719         filelist = filelist_new();
 720
 721         while ((entity = mpd_recv_entity(c->connection)) != NULL)
 722                 filelist_append(filelist, entity);
 723
 724         if (mpdclient_finish_command(c)) {
 725                 filelist_free(filelist);
 726                 return NULL;
 727         }
 728
 729         return filelist;
 730 }
 731
 732 struct filelist *
 733 mpdclient_filelist_search(struct mpdclient *c,
 734                           int exact_match,
 735                           enum mpd_tag_type tag,
 736                           gchar *filter_utf8)
 737 {
 738         if (MPD_ERROR(c))
 739                 return NULL;
 740
 741         mpd_search_db_songs(c->connection, exact_match);
 742         mpd_search_add_tag_constraint(c->connection, MPD_OPERATOR_DEFAULT,
 743                                       tag, filter_utf8);
 744         mpd_search_commit(c->connection);
 745
 746         return mpdclient_recv_filelist_response(c);
 747 }
 748
 749 int
 750 mpdclient_filelist_add_all(struct mpdclient *c, struct filelist *fl)
 751 {
 752         guint i;
 753
 754         if (MPD_ERROR(c))
 755                 return -1;
 756
 757         if (filelist_is_empty(fl))
 758                 return 0;
 759
 760         mpd_command_list_begin(c->connection, false);
 761
 762         for (i = 0; i < filelist_length(fl); ++i) {
 763                 struct filelist_entry *entry = filelist_get(fl, i);
 764                 struct mpd_entity *entity  = entry->entity;
 765
 766                 if (entity != NULL &&
 767                     mpd_entity_get_type(entity) == MPD_ENTITY_TYPE_SONG) {
 768                         const struct mpd_song *song =
 769                                 mpd_entity_get_song(entity);
 770                         const char *uri = mpd_song_get_uri(song);
 771
 772                         if (uri != NULL)
 773                                 mpd_send_add(c->connection, uri);
 774                 }
 775         }
 776
 777         mpd_command_list_end(c->connection);
 778         return mpdclient_finish_command(c);
 779 }
 780
 781 GList *
 782 mpdclient_get_artists(struct mpdclient *c)
 783 {
 784         GList *list = NULL;
 785         struct mpd_pair *pair;
 786
 787         if (MPD_ERROR(c))
 788                return NULL;
 789
 790         mpd_search_db_tags(c->connection, MPD_TAG_ARTIST);
 791         mpd_search_commit(c->connection);
 792
 793         while ((pair = mpd_recv_pair_tag(c->connection,
 794                                          MPD_TAG_ARTIST)) != NULL) {
 795                 list = g_list_append(list, g_strdup(pair->value));
 796                 mpd_return_pair(c->connection, pair);
 797         }
 798
 799         if (mpdclient_finish_command(c))
 800                 return string_list_free(list);
 801
 802         return list;
 803 }
 804
 805 GList *
 806 mpdclient_get_albums(struct mpdclient *c, const gchar *artist_utf8)
 807 {
 808         GList *list = NULL;
 809         struct mpd_pair *pair;
 810
 811         if (MPD_ERROR(c))
 812                return NULL;
 813
 814         mpd_search_db_tags(c->connection, MPD_TAG_ALBUM);
 815         if (artist_utf8 != NULL)
 816                 mpd_search_add_tag_constraint(c->connection,
 817                                               MPD_OPERATOR_DEFAULT,
 818                                               MPD_TAG_ARTIST, artist_utf8);
 819         mpd_search_commit(c->connection);
 820
 821         while ((pair = mpd_recv_pair_tag(c->connection,
 822                                          MPD_TAG_ALBUM)) != NULL) {
 823                 list = g_list_append(list, g_strdup(pair->value));
 824                 mpd_return_pair(c->connection, pair);
 825         }
 826
 827         if (mpdclient_finish_command(c))
 828                 return string_list_free(list);
 829
 830         return list;
 831 }