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 #include "gidle.h"
  28
  29 #include <mpd/client.h>
  30
  31 #include <stdlib.h>
  32 #include <unistd.h>
  33 #include <time.h>
  34 #include <string.h>
  35
  36 #define BUFSIZE 1024
  37
  38 /* sort by list-format */
  39 gint
  40 compare_filelistentry_format(gconstpointer filelist_entry1,
  41                              gconstpointer filelist_entry2)
  42 {
  43         const struct mpd_entity *e1, *e2;
  44         char key1[BUFSIZE], key2[BUFSIZE];
  45         int n = 0;
  46
  47         e1 = ((const struct filelist_entry *)filelist_entry1)->entity;
  48         e2 = ((const struct filelist_entry *)filelist_entry2)->entity;
  49
  50         if (e1 && e2 &&
  51             mpd_entity_get_type(e1) == MPD_ENTITY_TYPE_SONG &&
  52             mpd_entity_get_type(e2) == MPD_ENTITY_TYPE_SONG) {
  53                 strfsong(key1, BUFSIZE, options.list_format, mpd_entity_get_song(e1));
  54                 strfsong(key2, BUFSIZE, options.list_format, mpd_entity_get_song(e2));
  55                 n = strcmp(key1,key2);
  56         }
  57
  58         return n;
  59 }
  60
  61
  62 /****************************************************************************/
  63 /*** mpdclient functions ****************************************************/
  64 /****************************************************************************/
  65
  66 bool
  67 mpdclient_handle_error(struct mpdclient *c)
  68 {
  69         enum mpd_error error = mpd_connection_get_error(c->connection);
  70
  71         assert(error != MPD_ERROR_SUCCESS);
  72
  73         if (error == MPD_ERROR_SERVER &&
  74             mpd_connection_get_server_error(c->connection) == MPD_SERVER_ERROR_PERMISSION &&
  75             screen_auth(c))
  76                 return true;
  77
  78         mpdclient_ui_error(mpd_connection_get_error_message(c->connection));
  79
  80         if (!mpd_connection_clear_error(c->connection))
  81                 mpdclient_disconnect(c);
  82
  83         return false;
  84 }
  85
  86 static bool
  87 mpdclient_finish_command(struct mpdclient *c)
  88 {
  89         return mpd_response_finish(c->connection)
  90                 ? true : mpdclient_handle_error(c);
  91 }
  92
  93 struct mpdclient *
  94 mpdclient_new(void)
  95 {
  96         struct mpdclient *c;
  97
  98         c = g_new0(struct mpdclient, 1);
  99         playlist_init(&c->playlist);
 100         c->volume = -1;
 101         c->events = 0;
 102
 103         return c;
 104 }
 105
 106 void
 107 mpdclient_free(struct mpdclient *c)
 108 {
 109         mpdclient_disconnect(c);
 110
 111         mpdclient_playlist_free(&c->playlist);
 112
 113         g_free(c);
 114 }
 115
 116 void
 117 mpdclient_disconnect(struct mpdclient *c)
 118 {
 119         if (c->source != NULL) {
 120                 mpd_glib_free(c->source);
 121                 c->source = NULL;
 122                 c->idle = false;
 123         }
 124
 125         if (c->connection)
 126                 mpd_connection_free(c->connection);
 127         c->connection = NULL;
 128
 129         if (c->status)
 130                 mpd_status_free(c->status);
 131         c->status = NULL;
 132
 133         playlist_clear(&c->playlist);
 134
 135         if (c->song)
 136                 c->song = NULL;
 137
 138         /* everything has changed after a disconnect */
 139         c->events |= MPD_IDLE_DATABASE|MPD_IDLE_STORED_PLAYLIST|
 140                 MPD_IDLE_QUEUE|MPD_IDLE_PLAYER|MPD_IDLE_MIXER|MPD_IDLE_OUTPUT|
 141                 MPD_IDLE_OPTIONS|MPD_IDLE_UPDATE;
 142 }
 143
 144 bool
 145 mpdclient_connect(struct mpdclient *c,
 146                   const gchar *host,
 147                   gint port,
 148                   gfloat _timeout,
 149                   const gchar *password)
 150 {
 151         /* close any open connection */
 152         if( c->connection )
 153                 mpdclient_disconnect(c);
 154
 155         /* connect to MPD */
 156         c->connection = mpd_connection_new(host, port, _timeout * 1000);
 157         if (c->connection == NULL)
 158                 g_error("Out of memory");
 159
 160         if (mpd_connection_get_error(c->connection) != MPD_ERROR_SUCCESS) {
 161                 mpdclient_handle_error(c);
 162                 mpdclient_disconnect(c);
 163                 return false;
 164         }
 165
 166         /* send password */
 167         if (password != NULL && !mpd_run_password(c->connection, password)) {
 168                 mpdclient_handle_error(c);
 169                 mpdclient_disconnect(c);
 170                 return false;
 171         }
 172
 173         return true;
 174 }
 175
 176 bool
 177 mpdclient_update(struct mpdclient *c)
 178 {
 179         struct mpd_connection *connection = mpdclient_get_connection(c);
 180         bool retval;
 181
 182         c->volume = -1;
 183
 184         if (connection == NULL)
 185                 return false;
 186
 187         /* always announce these options as long as we don't have
 188            "idle" support */
 189         if (c->source == NULL)
 190                 c->events |= MPD_IDLE_PLAYER|MPD_IDLE_OPTIONS;
 191
 192         /* free the old status */
 193         if (c->status)
 194                 mpd_status_free(c->status);
 195
 196         /* retrieve new status */
 197         c->status = mpd_run_status(connection);
 198         if (c->status == NULL)
 199                 return mpdclient_handle_error(c);
 200
 201         if (c->source == NULL &&
 202             c->update_id != mpd_status_get_update_id(c->status)) {
 203                 c->events |= MPD_IDLE_UPDATE;
 204
 205                 if (c->update_id > 0)
 206                         c->events |= MPD_IDLE_DATABASE;
 207         }
 208
 209         c->update_id = mpd_status_get_update_id(c->status);
 210
 211         if (c->source == NULL &&
 212             c->volume != mpd_status_get_volume(c->status))
 213                 c->events |= MPD_IDLE_MIXER;
 214
 215         c->volume = mpd_status_get_volume(c->status);
 216
 217         /* check if the playlist needs an update */
 218         if (c->playlist.version != mpd_status_get_queue_version(c->status)) {
 219                 if (c->source == NULL)
 220                         c->events |= MPD_IDLE_PLAYLIST;
 221
 222                 if (!playlist_is_empty(&c->playlist))
 223                         retval = mpdclient_playlist_update_changes(c);
 224                 else
 225                         retval = mpdclient_playlist_update(c);
 226         } else
 227                 retval = true;
 228
 229         /* update the current song */
 230         if (!c->song || mpd_status_get_song_id(c->status)) {
 231                 c->song = playlist_get_song(&c->playlist,
 232                                             mpd_status_get_song_pos(c->status));
 233         }
 234
 235         return retval;
 236 }
 237
 238 struct mpd_connection *
 239 mpdclient_get_connection(struct mpdclient *c)
 240 {
 241         if (c->source != NULL && c->idle) {
 242                 c->idle = false;
 243                 mpd_glib_leave(c->source);
 244         }
 245
 246         return c->connection;
 247 }
 248
 249 void
 250 mpdclient_put_connection(struct mpdclient *c)
 251 {
 252         assert(c->source == NULL || c->connection != NULL);
 253
 254         if (c->source != NULL && !c->idle) {
 255                 c->idle = mpd_glib_enter(c->source);
 256         }
 257 }
 258
 259
 260 /****************************************************************************/
 261 /*** MPD Commands  **********************************************************/
 262 /****************************************************************************/
 263
 264 bool
 265 mpdclient_cmd_crop(struct mpdclient *c)
 266 {
 267         struct mpd_connection *connection;
 268         int length, current;
 269
 270         if (c->status == NULL)
 271                 return false;
 272
 273         length = mpd_status_get_queue_length(c->status);
 274         current = mpd_status_get_song_pos(c->status);
 275         if (current < 0 ||
 276             (mpd_status_get_state(c->status) != MPD_STATE_PLAY &&
 277              mpd_status_get_state(c->status) != MPD_STATE_PAUSE) ||
 278             mpd_status_get_queue_length(c->status) < 2)
 279                 return true;
 280
 281         connection = mpdclient_get_connection(c);
 282         if (connection == NULL)
 283                 return false;
 284
 285         mpd_command_list_begin(connection, false);
 286
 287         while (--length >= 0)
 288                 if (length != current)
 289                         mpd_send_delete(connection, length);
 290
 291         mpd_command_list_end(connection);
 292
 293         return mpdclient_finish_command(c);
 294 }
 295
 296 bool
 297 mpdclient_cmd_clear(struct mpdclient *c)
 298 {
 299         struct mpd_connection *connection = mpdclient_get_connection(c);
 300         struct mpd_status *status;
 301
 302         if (connection == NULL)
 303                 return false;
 304
 305         /* send "clear" and "status" */
 306         if (!mpd_command_list_begin(connection, false) ||
 307             !mpd_send_clear(connection) ||
 308             !mpd_send_status(connection) ||
 309             !mpd_command_list_end(connection))
 310                 return mpdclient_handle_error(c);
 311
 312         /* receive the new status, store it in the mpdclient struct */
 313
 314         status = mpd_recv_status(connection);
 315         if (status == NULL)
 316                 return mpdclient_handle_error(c);
 317
 318         if (c->status != NULL)
 319                 mpd_status_free(c->status);
 320         c->status = status;
 321
 322         if (!mpd_response_finish(connection))
 323                 return mpdclient_handle_error(c);
 324
 325         /* update mpdclient.playlist */
 326
 327         if (mpd_status_get_queue_length(status) == 0) {
 328                 /* after the "clear" command, the queue is really
 329                    empty - this means we can clear it locally,
 330                    reducing the UI latency */
 331                 playlist_clear(&c->playlist);
 332                 c->playlist.version = mpd_status_get_queue_version(status);
 333         }
 334
 335         c->events |= MPD_IDLE_QUEUE;
 336         return true;
 337 }
 338
 339 bool
 340 mpdclient_cmd_volume(struct mpdclient *c, gint value)
 341 {
 342         struct mpd_connection *connection = mpdclient_get_connection(c);
 343         if (connection == NULL)
 344                 return false;
 345
 346         mpd_send_set_volume(connection, value);
 347         return mpdclient_finish_command(c);
 348 }
 349
 350 bool
 351 mpdclient_cmd_volume_up(struct mpdclient *c)
 352 {
 353         struct mpd_connection *connection = mpdclient_get_connection(c);
 354         if (connection == NULL)
 355                 return false;
 356
 357         if (c->status == NULL ||
 358             mpd_status_get_volume(c->status) == -1)
 359                 return true;
 360
 361         if (c->volume < 0)
 362                 c->volume = mpd_status_get_volume(c->status);
 363
 364         if (c->volume >= 100)
 365                 return true;
 366
 367         return mpdclient_cmd_volume(c, ++c->volume);
 368 }
 369
 370 bool
 371 mpdclient_cmd_volume_down(struct mpdclient *c)
 372 {
 373         struct mpd_connection *connection = mpdclient_get_connection(c);
 374         if (connection == NULL)
 375                 return false;
 376
 377         if (c->status == NULL || mpd_status_get_volume(c->status) < 0)
 378                 return true;
 379
 380         if (c->volume < 0)
 381                 c->volume = mpd_status_get_volume(c->status);
 382
 383         if (c->volume <= 0)
 384                 return true;
 385
 386         return mpdclient_cmd_volume(c, --c->volume);
 387 }
 388
 389 bool
 390 mpdclient_cmd_add_path(struct mpdclient *c, const gchar *path_utf8)
 391 {
 392         struct mpd_connection *connection = mpdclient_get_connection(c);
 393         if (connection == NULL)
 394                 return false;
 395
 396         mpd_send_add(connection, path_utf8);
 397         return mpdclient_finish_command(c);
 398 }
 399
 400 bool
 401 mpdclient_cmd_add(struct mpdclient *c, const struct mpd_song *song)
 402 {
 403         struct mpd_connection *connection = mpdclient_get_connection(c);
 404         struct mpd_status *status;
 405         struct mpd_song *new_song;
 406
 407         assert(c != NULL);
 408         assert(song != NULL);
 409
 410         if (connection == NULL || c->status == NULL)
 411                 return false;
 412
 413         /* send the add command to mpd; at the same time, get the new
 414            status (to verify the new playlist id) and the last song
 415            (we hope that's the song we just added) */
 416
 417         if (!mpd_command_list_begin(connection, true) ||
 418             !mpd_send_add(connection, mpd_song_get_uri(song)) ||
 419             !mpd_send_status(connection) ||
 420             !mpd_send_get_queue_song_pos(connection,
 421                                          playlist_length(&c->playlist)) ||
 422             !mpd_command_list_end(connection) ||
 423             !mpd_response_next(connection))
 424                 return mpdclient_handle_error(c);
 425
 426         c->events |= MPD_IDLE_PLAYLIST;
 427
 428         status = mpd_recv_status(connection);
 429         if (status != NULL) {
 430                 if (c->status != NULL)
 431                         mpd_status_free(c->status);
 432                 c->status = status;
 433         }
 434
 435         if (!mpd_response_next(connection))
 436                 return mpdclient_handle_error(c);
 437
 438         new_song = mpd_recv_song(connection);
 439         if (!mpd_response_finish(connection) || new_song == NULL) {
 440                 if (new_song != NULL)
 441                         mpd_song_free(new_song);
 442
 443                 return mpd_connection_clear_error(connection) ||
 444                         mpdclient_handle_error(c);
 445         }
 446
 447         if (mpd_status_get_queue_length(status) == playlist_length(&c->playlist) + 1 &&
 448             mpd_status_get_queue_version(status) == c->playlist.version + 1) {
 449                 /* the cheap route: match on the new playlist length
 450                    and its version, we can keep our local playlist
 451                    copy in sync */
 452                 c->playlist.version = mpd_status_get_queue_version(status);
 453
 454                 /* the song we just received has the correct id;
 455                    append it to the local playlist */
 456                 playlist_append(&c->playlist, new_song);
 457         }
 458
 459         mpd_song_free(new_song);
 460
 461         return true;
 462 }
 463
 464 bool
 465 mpdclient_cmd_delete(struct mpdclient *c, gint idx)
 466 {
 467         struct mpd_connection *connection = mpdclient_get_connection(c);
 468         const struct mpd_song *song;
 469         struct mpd_status *status;
 470
 471         if (connection == NULL || c->status == NULL)
 472                 return false;
 473
 474         if (idx < 0 || (guint)idx >= playlist_length(&c->playlist))
 475                 return false;
 476
 477         song = playlist_get(&c->playlist, idx);
 478
 479         /* send the delete command to mpd; at the same time, get the
 480            new status (to verify the playlist id) */
 481
 482         if (!mpd_command_list_begin(connection, false) ||
 483             !mpd_send_delete_id(connection, mpd_song_get_id(song)) ||
 484             !mpd_send_status(connection) ||
 485             !mpd_command_list_end(connection))
 486                 return mpdclient_handle_error(c);
 487
 488         c->events |= MPD_IDLE_PLAYLIST;
 489
 490         status = mpd_recv_status(connection);
 491         if (status != NULL) {
 492                 if (c->status != NULL)
 493                         mpd_status_free(c->status);
 494                 c->status = status;
 495         }
 496
 497         if (!mpd_response_finish(connection))
 498                 return mpdclient_handle_error(c);
 499
 500         if (mpd_status_get_queue_length(status) == playlist_length(&c->playlist) - 1 &&
 501             mpd_status_get_queue_version(status) == c->playlist.version + 1) {
 502                 /* the cheap route: match on the new playlist length
 503                    and its version, we can keep our local playlist
 504                    copy in sync */
 505                 c->playlist.version = mpd_status_get_queue_version(status);
 506
 507                 /* remove the song from the local playlist */
 508                 playlist_remove(&c->playlist, idx);
 509
 510                 /* remove references to the song */
 511                 if (c->song == song)
 512                         c->song = NULL;
 513         }
 514
 515         return true;
 516 }
 517
 518 /**
 519  * Fallback for mpdclient_cmd_delete_range() on MPD older than 0.16.
 520  * It emulates the "delete range" command with a list of simple
 521  * "delete" commands.
 522  */
 523 static bool
 524 mpdclient_cmd_delete_range_fallback(struct mpdclient *c,
 525                                     unsigned start, unsigned end)
 526 {
 527         struct mpd_connection *connection = mpdclient_get_connection(c);
 528         if (connection == NULL)
 529                 return false;
 530
 531         if (!mpd_command_list_begin(connection, false))
 532                 return mpdclient_handle_error(c);
 533
 534         for (; start < end; --end)
 535                 mpd_send_delete(connection, start);
 536
 537         if (!mpd_command_list_end(connection) ||
 538             !mpd_response_finish(connection))
 539                 return mpdclient_handle_error(c);
 540
 541         return true;
 542 }
 543
 544 bool
 545 mpdclient_cmd_delete_range(struct mpdclient *c, unsigned start, unsigned end)
 546 {
 547         struct mpd_connection *connection;
 548         struct mpd_status *status;
 549
 550         if (end == start + 1)
 551                 /* if that's not really a range, we choose to use the
 552                    safer "deleteid" version */
 553                 return mpdclient_cmd_delete(c, start);
 554
 555         connection = mpdclient_get_connection(c);
 556         if (connection == NULL)
 557                 return false;
 558
 559         if (mpd_connection_cmp_server_version(connection, 0, 16, 0) < 0)
 560                 return mpdclient_cmd_delete_range_fallback(c, start, end);
 561
 562         /* MPD 0.16 supports "delete" with a range argument */
 563
 564         /* send the delete command to mpd; at the same time, get the
 565            new status (to verify the playlist id) */
 566
 567         if (!mpd_command_list_begin(connection, false) ||
 568             !mpd_send_delete_range(connection, start, end) ||
 569             !mpd_send_status(connection) ||
 570             !mpd_command_list_end(connection))
 571                 return mpdclient_handle_error(c);
 572
 573         c->events |= MPD_IDLE_PLAYLIST;
 574
 575         status = mpd_recv_status(connection);
 576         if (status != NULL) {
 577                 if (c->status != NULL)
 578                         mpd_status_free(c->status);
 579                 c->status = status;
 580         }
 581
 582         if (!mpd_response_finish(connection))
 583                 return mpdclient_handle_error(c);
 584
 585         if (mpd_status_get_queue_length(status) == playlist_length(&c->playlist) - (end - start) &&
 586             mpd_status_get_queue_version(status) == c->playlist.version + 1) {
 587                 /* the cheap route: match on the new playlist length
 588                    and its version, we can keep our local playlist
 589                    copy in sync */
 590                 c->playlist.version = mpd_status_get_queue_version(status);
 591
 592                 /* remove the song from the local playlist */
 593                 while (end > start) {
 594                         --end;
 595
 596                         /* remove references to the song */
 597                         if (c->song == playlist_get(&c->playlist, end))
 598                                 c->song = NULL;
 599
 600                         playlist_remove(&c->playlist, end);
 601                 }
 602         }
 603
 604         return true;
 605 }
 606
 607 bool
 608 mpdclient_cmd_move(struct mpdclient *c, gint old_index, gint new_index)
 609 {
 610         struct mpd_connection *connection = mpdclient_get_connection(c);
 611         const struct mpd_song *song1, *song2;
 612         struct mpd_status *status;
 613
 614         if (connection == NULL)
 615                 return false;
 616
 617         if (old_index == new_index || new_index < 0 ||
 618             (guint)new_index >= c->playlist.list->len)
 619                 return false;
 620
 621         song1 = playlist_get(&c->playlist, old_index);
 622         song2 = playlist_get(&c->playlist, new_index);
 623
 624         /* send the delete command to mpd; at the same time, get the
 625            new status (to verify the playlist id) */
 626
 627         if (!mpd_command_list_begin(connection, false) ||
 628             !mpd_send_swap_id(connection, mpd_song_get_id(song1),
 629                               mpd_song_get_id(song2)) ||
 630             !mpd_send_status(connection) ||
 631             !mpd_command_list_end(connection))
 632                 return mpdclient_handle_error(c);
 633
 634         c->events |= MPD_IDLE_PLAYLIST;
 635
 636         status = mpd_recv_status(connection);
 637         if (status != NULL) {
 638                 if (c->status != NULL)
 639                         mpd_status_free(c->status);
 640                 c->status = status;
 641         }
 642
 643         if (!mpd_response_finish(connection))
 644                 return mpdclient_handle_error(c);
 645
 646         if (mpd_status_get_queue_length(status) == playlist_length(&c->playlist) &&
 647             mpd_status_get_queue_version(status) == c->playlist.version + 1) {
 648                 /* the cheap route: match on the new playlist length
 649                    and its version, we can keep our local playlist
 650                    copy in sync */
 651                 c->playlist.version = mpd_status_get_queue_version(status);
 652
 653                 /* swap songs in the local playlist */
 654                 playlist_swap(&c->playlist, old_index, new_index);
 655         }
 656
 657         return true;
 658 }
 659
 660
 661 /****************************************************************************/
 662 /*** Playlist management functions ******************************************/
 663 /****************************************************************************/
 664
 665 /* update playlist */
 666 bool
 667 mpdclient_playlist_update(struct mpdclient *c)
 668 {
 669         struct mpd_connection *connection = mpdclient_get_connection(c);
 670         struct mpd_entity *entity;
 671
 672         if (connection == NULL)
 673                 return false;
 674
 675         playlist_clear(&c->playlist);
 676
 677         mpd_send_list_queue_meta(connection);
 678         while ((entity = mpd_recv_entity(connection))) {
 679                 if (mpd_entity_get_type(entity) == MPD_ENTITY_TYPE_SONG)
 680                         playlist_append(&c->playlist, mpd_entity_get_song(entity));
 681
 682                 mpd_entity_free(entity);
 683         }
 684
 685         c->playlist.version = mpd_status_get_queue_version(c->status);
 686         c->song = NULL;
 687
 688         return mpdclient_finish_command(c);
 689 }
 690
 691 /* update playlist (plchanges) */
 692 bool
 693 mpdclient_playlist_update_changes(struct mpdclient *c)
 694 {
 695         struct mpd_connection *connection = mpdclient_get_connection(c);
 696         struct mpd_song *song;
 697         guint length;
 698
 699         if (connection == NULL)
 700                 return false;
 701
 702         mpd_send_queue_changes_meta(connection, c->playlist.version);
 703
 704         while ((song = mpd_recv_song(connection)) != NULL) {
 705                 int pos = mpd_song_get_pos(song);
 706
 707                 if (pos >= 0 && (guint)pos < c->playlist.list->len) {
 708                         /* update song */
 709                         playlist_replace(&c->playlist, pos, song);
 710                 } else {
 711                         /* add a new song */
 712                         playlist_append(&c->playlist, song);
 713                 }
 714
 715                 mpd_song_free(song);
 716         }
 717
 718         /* remove trailing songs */
 719
 720         length = mpd_status_get_queue_length(c->status);
 721         while (length < c->playlist.list->len) {
 722                 guint pos = c->playlist.list->len - 1;
 723
 724                 /* Remove the last playlist entry */
 725                 playlist_remove(&c->playlist, pos);
 726         }
 727
 728         c->song = NULL;
 729         c->playlist.version = mpd_status_get_queue_version(c->status);
 730
 731         return mpdclient_finish_command(c);
 732 }
 733
 734
 735 /****************************************************************************/
 736 /*** Filelist functions *****************************************************/
 737 /****************************************************************************/
 738
 739 bool
 740 mpdclient_filelist_add_all(struct mpdclient *c, struct filelist *fl)
 741 {
 742         struct mpd_connection *connection = mpdclient_get_connection(c);
 743         guint i;
 744
 745         if (connection == NULL)
 746                 return false;
 747
 748         if (filelist_is_empty(fl))
 749                 return true;
 750
 751         mpd_command_list_begin(connection, false);
 752
 753         for (i = 0; i < filelist_length(fl); ++i) {
 754                 struct filelist_entry *entry = filelist_get(fl, i);
 755                 struct mpd_entity *entity  = entry->entity;
 756
 757                 if (entity != NULL &&
 758                     mpd_entity_get_type(entity) == MPD_ENTITY_TYPE_SONG) {
 759                         const struct mpd_song *song =
 760                                 mpd_entity_get_song(entity);
 761
 762                         mpd_send_add(connection, mpd_song_get_uri(song));
 763                 }
 764         }
 765
 766         mpd_command_list_end(connection);
 767         return mpdclient_finish_command(c);
 768 }