mdw@git.distorted.org.uk Git - disorder/blob - server/macros-disorder.c

   1 /*
   2  * This file is part of DisOrder.
   3  * Copyright (C) 2004-2008 Richard Kettlewell
   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, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  18  * USA
  19  */
  20 /** @file server/macros-disorder.c
  21  * @brief DisOrder-specific expansions
  22  */
  23
  24 #include "disorder-cgi.h"
  25
  26 /** @brief For error template */
  27 char *dcgi_error_string;
  28
  29 /** @brief Return @p i as a string */
  30 static const char *make_index(int i) {
  31   char *s;
  32
  33   byte_xasprintf(&s, "%d", i);
  34   return s;
  35 }
  36
  37 /* @server-version
  38  *
  39  * Expands to the server's version string, or a (safe to use) error
  40  * value if the server is unavailable or broken.
  41  */
  42 static int exp_server_version(int attribute((unused)) nargs,
  43                               char attribute((unused)) **args,
  44                               struct sink *output,
  45                               void attribute((unused)) *u) {
  46   const char *v;
  47
  48   if(dcgi_client) {
  49     if(disorder_version(dcgi_client, (char **)&v))
  50       v = "(cannot get version)";
  51   } else
  52     v = "(server not running)";
  53   return sink_writes(output, cgi_sgmlquote(v)) < 0 ? -1 : 0;
  54 }
  55
  56 /* @version
  57  *
  58  * Expands to the local version string.
  59  */
  60 static int exp_version(int attribute((unused)) nargs,
  61                        char attribute((unused)) **args,
  62                        struct sink *output,
  63                        void attribute((unused)) *u) {
  64   return sink_writes(output,
  65                      cgi_sgmlquote(disorder_short_version_string)) < 0 ? -1 : 0;
  66 }
  67
  68 /* @url
  69  *
  70  * Expands to the base URL of the web interface.
  71  */
  72 static int exp_url(int attribute((unused)) nargs,
  73                    char attribute((unused)) **args,
  74                    struct sink *output,
  75                    void attribute((unused)) *u) {
  76   return sink_writes(output,
  77                      cgi_sgmlquote(config->url)) < 0 ? -1 : 0;
  78 }
  79
  80 /* @arg{NAME}
  81  *
  82  * Expands to the CGI argument NAME, or the empty string if there is
  83  * no such argument.
  84  */
  85 static int exp_arg(int attribute((unused)) nargs,
  86                    char **args,
  87                    struct sink *output,
  88                    void attribute((unused)) *u) {
  89   const char *s = cgi_get(args[0]);
  90
  91   if(s)
  92     return sink_writes(output,
  93                        cgi_sgmlquote(s)) < 0 ? -1 : 0;
  94   else
  95     return 0;
  96 }
  97
  98 /* @user
  99  *
 100  * Expands to the logged-in username (which might be "guest"), or to
 101  * the empty string if not connected.
 102  */
 103 static int exp_user(int attribute((unused)) nargs,
 104                     char attribute((unused)) **args,
 105                     struct sink *output,
 106                     void attribute((unused)) *u) {
 107   const char *user;
 108
 109   if(dcgi_client && (user = disorder_user(dcgi_client)))
 110     return sink_writes(output, cgi_sgmlquote(user)) < 0 ? -1 : 0;
 111   return 0;
 112 }
 113
 114 /* @part{TRACK|ID}{PART}{CONTEXT}
 115  *
 116  * Expands to a track name part.
 117  *
 118  * A track may be identified by name or by queue ID.
 119  *
 120  * CONTEXT may be omitted.  If it is then 'display' is assumed.
 121  *
 122  * If the CONTEXT is 'short' then the 'display' part is looked up, and the
 123  * result truncated according to the length defined by the short_display
 124  * configuration directive.
 125  */
 126 static int exp_part(int nargs,
 127                     char **args,
 128                     struct sink *output,
 129                     void attribute((unused)) *u) {
 130   const char *track = args[0], *part = args[1];
 131   const char *context = nargs > 2 ? args[2] : "display";
 132   char *s;
 133
 134   if(track[0] != '/') {
 135     struct queue_entry *q = dcgi_findtrack(track);
 136
 137     if(q)
 138       track = q->track;
 139     else
 140       return 0;
 141   }
 142   if(dcgi_client
 143      && !disorder_part(dcgi_client, &s,
 144                        track,
 145                        !strcmp(context, "short") ? "display" : context,
 146                        part))
 147     return sink_writes(output, cgi_sgmlquote(s)) < 0 ? -1 : 0;
 148   return 0;
 149 }
 150
 151 /* @quote{STRING}
 152  *
 153  * SGML-quotes STRING.  Note that most expansion results are already suitable
 154  * quoted, so this expansion is usually not required.
 155  */
 156 static int exp_quote(int attribute((unused)) nargs,
 157                      char **args,
 158                      struct sink *output,
 159                      void attribute((unused)) *u) {
 160   return sink_writes(output, cgi_sgmlquote(args[0])) < 0 ? -1 : 0;
 161 }
 162
 163 /* @who{ID}
 164  *
 165  * Expands to the name of the submitter of track ID, which must be a playing
 166  * track, in the queue, or in the recent list.
 167  */
 168 static int exp_who(int attribute((unused)) nargs,
 169                    char **args,
 170                    struct sink *output,
 171                    void attribute((unused)) *u) {
 172   struct queue_entry *q = dcgi_findtrack(args[0]);
 173
 174   if(q && q->submitter)
 175     return sink_writes(output, cgi_sgmlquote(q->submitter)) < 0 ? -1 : 0;
 176   return 0;
 177 }
 178
 179 /* @when{ID}
 180  *
 181  * Expands to the time a track started or is expected to start.  The track must
 182  * be a playing track, in the queue, or in the recent list.
 183  */
 184 static int exp_when(int attribute((unused)) nargs,
 185                    char **args,
 186                    struct sink *output,
 187                     void attribute((unused)) *u) {
 188   struct queue_entry *q = dcgi_findtrack(args[0]);
 189   const struct tm *w = 0;
 190
 191   if(q) {
 192     switch(q->state) {
 193     case playing_isscratch:
 194     case playing_unplayed:
 195     case playing_random:
 196       if(q->expected)
 197         w = localtime(&q->expected);
 198       break;
 199     case playing_failed:
 200     case playing_no_player:
 201     case playing_ok:
 202     case playing_scratched:
 203     case playing_started:
 204     case playing_paused:
 205     case playing_quitting:
 206       if(q->played)
 207         w = localtime(&q->played);
 208       break;
 209     }
 210     if(w)
 211       return sink_printf(output, "%d:%02d", w->tm_hour, w->tm_min) < 0 ? -1 : 0;
 212   }
 213   return sink_writes(output, "&nbsp;") < 0 ? -1 : 0;
 214 }
 215
 216 /* @length{ID|TRACK}
 217  *
 218  * Expands to the length of a track, identified by its queue ID or its name.
 219  * If it is the playing track (identified by ID) then the amount played so far
 220  * is included.
 221  */
 222 static int exp_length(int attribute((unused)) nargs,
 223                    char **args,
 224                    struct sink *output,
 225                    void attribute((unused)) *u) {
 226   struct queue_entry *q;
 227   long length = 0;
 228   const char *name;
 229
 230   if(args[0][0] == '/')
 231     /* Track identified by name */
 232     name = args[0];
 233   else {
 234     /* Track identified by queue ID */
 235     if(!(q = dcgi_findtrack(args[0])))
 236       return 0;
 237     if(q->state == playing_started || q->state == playing_paused)
 238       if(sink_printf(output, "%ld:%02ld/", q->sofar / 60, q->sofar % 60) < 0)
 239         return -1;
 240     name = q->track;
 241   }
 242   if(dcgi_client && disorder_length(dcgi_client, name, &length))
 243     return sink_printf(output, "%ld:%02ld",
 244                        length / 60, length % 60) < 0 ? -1 : 0;
 245   return sink_writes(output, "&nbsp;") < 0 ? -1 : 0;
 246 }
 247
 248 /* @removable{ID}
 249  *
 250  * Expands to "true" if track ID is removable (or scratchable, if it is the
 251  * playing track) and "false" otherwise.
 252  */
 253 static int exp_removable(int attribute((unused)) nargs,
 254                          char **args,
 255                          struct sink *output,
 256                          void attribute((unused)) *u) {
 257   struct queue_entry *q = dcgi_findtrack(args[0]);
 258   /* TODO would be better to reject recent */
 259
 260   if(!q || !dcgi_client)
 261     return mx_bool_result(output, 0);
 262   dcgi_lookup(DCGI_RIGHTS);
 263   return mx_bool_result(output,
 264                         (q == dcgi_playing ? right_scratchable : right_removable)
 265                             (dcgi_rights, disorder_user(dcgi_client), q));
 266 }
 267
 268 /* @movable{ID}
 269  *
 270  * Expands to "true" if track ID is movable and "false" otherwise.
 271  */
 272 static int exp_movable(int attribute((unused)) nargs,
 273                        char **args,
 274                        struct sink *output,
 275                        void attribute((unused)) *u) {
 276   struct queue_entry *q = dcgi_findtrack(args[0]);
 277   /* TODO would be better to recent playing/recent */
 278
 279   if(!q || !dcgi_client)
 280     return mx_bool_result(output, 0);
 281   dcgi_lookup(DCGI_RIGHTS);
 282   return mx_bool_result(output,
 283                         right_movable(dcgi_rights, disorder_user(dcgi_client), q));
 284 }
 285
 286 /* @playing{TEMPLATE}
 287  *
 288  * Expands to TEMPLATE, with:
 289  * - @id@ expanded to the queue ID of the playing track
 290  * - @track@ expanded to its UNQUOTED name
 291  *
 292  * If no track is playing expands to nothing.
 293  *
 294  * TEMPLATE is optional.  If it is left out then instead expands to the queue
 295  * ID of the playing track.
 296  */
 297 static int exp_playing(int nargs,
 298                        const struct mx_node **args,
 299                        struct sink *output,
 300                        void *u) {
 301   dcgi_lookup(DCGI_PLAYING);
 302   if(!dcgi_playing)
 303     return 0;
 304   if(!nargs)
 305     return sink_writes(output, dcgi_playing->id) < 0 ? -1 : 0;
 306   return mx_expand(mx_rewritel(args[0],
 307                                "id", dcgi_playing->id,
 308                                "track", dcgi_playing->track,
 309                                (char *)0),
 310                    output, u);
 311 }
 312
 313 /* @queue{TEMPLATE}
 314  *
 315  * For each track in the queue, expands TEMPLATE with the following expansions:
 316  * - @id@ to the queue ID of the track
 317  * - @track@ to the UNQUOTED track name
 318  * - @index@ to the track number from 0
 319  * - @parity@ to "even" or "odd" alternately
 320  * - @first@ to "true" on the first track and "false" otherwise
 321  * - @last@ to "true" on the last track and "false" otherwise
 322  */
 323 static int exp_queue(int attribute((unused)) nargs,
 324                      const struct mx_node **args,
 325                      struct sink *output,
 326                      void *u) {
 327   struct queue_entry *q;
 328   int rc, i;
 329
 330   dcgi_lookup(DCGI_QUEUE);
 331   for(q = dcgi_queue, i = 0; q; q = q->next, ++i)
 332     if((rc = mx_expand(mx_rewritel(args[0],
 333                                    "id", q->id,
 334                                    "track", q->track,
 335                                    "index", make_index(i),
 336                                    "parity", i % 2 ? "odd" : "even",
 337                                    "first", q == dcgi_queue ? "true" : "false",
 338                                    "last", q->next ? "false" : "true",
 339                                    (char *)0),
 340                        output, u)))
 341       return rc;
 342   return 0;
 343 }
 344
 345 /* @recent{TEMPLATE}
 346  *
 347  * For each track in the recently played list, expands TEMPLATE with the
 348  * following expansions:
 349  * - @id@ to the queue ID of the track
 350  * - @track@  to the UNQUOTED track name
 351  * - @index@ to the track number from 0
 352  * - @parity@ to "even" or "odd" alternately
 353  * - @first@ to "true" on the first track and "false" otherwise
 354  * - @last@ to "true" on the last track and "false" otherwise
 355  */
 356 static int exp_recent(int attribute((unused)) nargs,
 357                       const struct mx_node **args,
 358                       struct sink *output,
 359                       void *u) {
 360   struct queue_entry *q;
 361   int rc, i;
 362
 363   dcgi_lookup(DCGI_RECENT);
 364   for(q = dcgi_recent, i = 0; q; q = q->next, ++i)
 365     if((rc = mx_expand(mx_rewritel(args[0],
 366                                    "id", q->id,
 367                                    "track", q->track,
 368                                    "index", make_index(i),
 369                                    "parity", i % 2 ? "odd" : "even",
 370                                    "first", q == dcgi_recent ? "true" : "false",
 371                                    "last", q->next ? "false" : "true",
 372                                    (char *)0),
 373                        output, u)))
 374       return rc;
 375   return 0;
 376 }
 377
 378 /* @new{TEMPLATE}
 379  *
 380  * For each track in the newly added list, expands TEMPLATE wit the following
 381  * expansions:
 382  * - @track@ to the UNQUOTED track name
 383  * - @index@ to the track number from 0
 384  * - @parity@ to "even" or "odd" alternately
 385  * - @first@ to "true" on the first track and "false" otherwise
 386  * - @last@ to "true" on the last track and "false" otherwise
 387  *
 388  * Note that unlike @playing@, @queue@ and @recent@ which are otherwise
 389  * superficially similar, there is no @id@ sub-expansion here.
 390  */
 391 static int exp_new(int attribute((unused)) nargs,
 392                    const struct mx_node **args,
 393                    struct sink *output,
 394                    void *u) {
 395   int rc, i;
 396
 397   dcgi_lookup(DCGI_NEW);
 398   /* TODO perhaps we should generate an ID value for tracks in the new list */
 399   for(i = 0; i < dcgi_nnew; ++i)
 400     if((rc = mx_expand(mx_rewritel(args[0],
 401                                    "track", dcgi_new[i],
 402                                    "index", make_index(i),
 403                                    "parity", i % 2 ? "odd" : "even",
 404                                    "first", i == 0 ? "true" : "false",
 405                                    "last", i == dcgi_nnew - 1 ? "false" : "true",
 406                                    (char *)0),
 407                        output, u)))
 408       return rc;
 409   return 0;
 410 }
 411
 412 /* @volume{CHANNEL}
 413  *
 414  * Expands to the volume in a given channel.  CHANNEL must be "left" or
 415  * "right".
 416  */
 417 static int exp_volume(int attribute((unused)) nargs,
 418                       char **args,
 419                       struct sink *output,
 420                       void attribute((unused)) *u) {
 421   dcgi_lookup(DCGI_VOLUME);
 422   return sink_printf(output, "%d",
 423                      !strcmp(args[0], "left")
 424                          ? dcgi_volume_left : dcgi_volume_right) < 0 ? -1 : 0;
 425 }
 426
 427 /* @isplaying
 428  *
 429  * Expands to "true" if there is a playing track, otherwise "false".
 430  */
 431 static int exp_isplaying(int attribute((unused)) nargs,
 432                          char attribute((unused)) **args,
 433                          struct sink *output,
 434                          void attribute((unused)) *u) {
 435   dcgi_lookup(DCGI_PLAYING);
 436   return mx_bool_result(output, !!dcgi_playing);
 437 }
 438
 439 /* @isqueue
 440  *
 441  * Expands to "true" if there the queue is nonempty, otherwise "false".
 442  */
 443 static int exp_isqueue(int attribute((unused)) nargs,
 444                        char attribute((unused)) **args,
 445                        struct sink *output,
 446                        void attribute((unused)) *u) {
 447   dcgi_lookup(DCGI_QUEUE);
 448   return mx_bool_result(output, !!dcgi_queue);
 449 }
 450
 451 /* @isrecent@
 452  *
 453  * Expands to "true" if there the recently played list is nonempty, otherwise
 454  * "false".
 455  */
 456 static int exp_isrecent(int attribute((unused)) nargs,
 457                         char attribute((unused)) **args,
 458                         struct sink *output,
 459                         void attribute((unused)) *u) {
 460   dcgi_lookup(DCGI_RECENT);
 461   return mx_bool_result(output, !!dcgi_recent);
 462 }
 463
 464 /* @isnew
 465  *
 466  * Expands to "true" if there the newly added track list is nonempty, otherwise
 467  * "false".
 468  */
 469 static int exp_isnew(int attribute((unused)) nargs,
 470                      char attribute((unused)) **args,
 471                      struct sink *output,
 472                      void attribute((unused)) *u) {
 473   dcgi_lookup(DCGI_NEW);
 474   return mx_bool_result(output, !!dcgi_nnew);
 475 }
 476
 477 /* @pref{TRACK}{KEY}
 478  *
 479  * Expands to a track preference.
 480  */
 481 static int exp_pref(int attribute((unused)) nargs,
 482                     char **args,
 483                     struct sink *output,
 484                     void attribute((unused)) *u) {
 485   char *value;
 486
 487   if(dcgi_client && !disorder_get(dcgi_client, args[0], args[1], &value))
 488     return sink_writes(output, cgi_sgmlquote(value)) < 0 ? -1 : 0;
 489   return 0;
 490 }
 491
 492 /* @prefs{TRACK}{TEMPLATE}
 493  *
 494  * For each track preference of track TRACK, expands TEMPLATE with the
 495  * following expansions:
 496  * - @name@ to the UNQUOTED preference name
 497  * - @index@ to the preference number from 0
 498  * - @value@ to the UNQUOTED preference value
 499  * - @parity@ to "even" or "odd" alternately
 500  * - @first@ to "true" on the first preference and "false" otherwise
 501  * - @last@ to "true" on the last preference and "false" otherwise
 502  *
 503  * Use @quote@ to quote preference names and values where necessary; see below.
 504  */
 505 static int exp_prefs(int attribute((unused)) nargs,
 506                      const struct mx_node **args,
 507                      struct sink *output,
 508                      void *u) {
 509   int rc, i;
 510   struct kvp *k, *head;
 511   char *track;
 512
 513   if((rc = mx_expandstr(args[0], &track, u, "argument #0 (TRACK)")))
 514     return rc;
 515   if(!dcgi_client || disorder_prefs(dcgi_client, track, &head))
 516     return 0;
 517   for(k = head, i = 0; k; k = k->next, ++i)
 518     if((rc = mx_expand(mx_rewritel(args[1],
 519                                    "index", make_index(i),
 520                                    "parity", i % 2 ? "odd" : "even",
 521                                    "name", k->name,
 522                                    "value", k->value,
 523                                    "first", k == head ? "true" : "false",
 524                                    "last", k->next ? "false" : "true",
 525                                    (char *)0),
 526                        output, u)))
 527       return rc;
 528   return 0;
 529 }
 530
 531 /* @transform{TRACK}{TYPE}{CONTEXT}
 532  *
 533  * Transforms a track name (if TYPE is "track") or directory name (if type is
 534  * "dir").  CONTEXT should be the context, if it is left out then "display" is
 535  * assumed.
 536  */
 537 static int exp_transform(int nargs,
 538                          char **args,
 539                          struct sink *output,
 540                          void attribute((unused)) *u) {
 541   const char *t = trackname_transform(args[1], args[0],
 542                                       (nargs > 2 ? args[2] : "display"));
 543   return sink_writes(output, cgi_sgmlquote(t)) < 0 ? -1 : 0;
 544 }
 545
 546 /* @enabled@
 547  *
 548  * Expands to "true" if playing is enabled, otherwise "false".
 549  */
 550 static int exp_enabled(int attribute((unused)) nargs,
 551                        char attribute((unused)) **args,
 552                        struct sink *output,
 553                        void attribute((unused)) *u) {
 554   int e = 0;
 555
 556   if(dcgi_client)
 557     disorder_enabled(dcgi_client, &e);
 558   return mx_bool_result(output, e);
 559 }
 560
 561 /* @random-enabled
 562  *
 563  * Expands to "true" if random play is enabled, otherwise "false".
 564  */
 565 static int exp_random_enabled(int attribute((unused)) nargs,
 566                               char attribute((unused)) **args,
 567                               struct sink *output,
 568                               void attribute((unused)) *u) {
 569   int e = 0;
 570
 571   if(dcgi_client)
 572     disorder_random_enabled(dcgi_client, &e);
 573   return mx_bool_result(output, e);
 574 }
 575
 576 /* @trackstate{TRACK}
 577  *
 578  * Expands to "playing" if TRACK is currently playing, or "queue" if it is in
 579  * the queue, otherwise to nothing.
 580  */
 581 static int exp_trackstate(int attribute((unused)) nargs,
 582                           char **args,
 583                           struct sink *output,
 584                           void attribute((unused)) *u) {
 585   char *track;
 586   struct queue_entry *q;
 587
 588   if(!dcgi_client)
 589     return 0;
 590   if(disorder_resolve(dcgi_client, &track, args[0]))
 591     return 0;
 592   dcgi_lookup(DCGI_PLAYING);
 593   if(dcgi_playing && !strcmp(track, dcgi_playing->track))
 594     return sink_writes(output, "playing") < 0 ? -1 : 0;
 595   dcgi_lookup(DCGI_QUEUE);
 596   for(q = dcgi_queue; q; q = q->next)
 597     if(!strcmp(track, q->track))
 598       return sink_writes(output, "queued") < 0 ? -1 : 0;
 599   return 0;
 600 }
 601
 602 /* @thisurl
 603  *
 604  * Expands to an UNQUOTED URL which points back to the current page.  (NB it
 605  * might not be byte for byte identical - for instance, CGI arguments might be
 606  * re-ordered.)
 607  */
 608 static int exp_thisurl(int attribute((unused)) nargs,
 609                        char attribute((unused)) **args,
 610                        struct sink *output,
 611                        void attribute((unused)) *u) {
 612   return sink_writes(output, cgi_thisurl(config->url)) < 0 ? -1 : 0;
 613 }
 614
 615 /* @resolve{TRACK}
 616  *
 617  * Expands to an UNQUOTED name for the TRACK that is not an alias, or to
 618  * nothing if it is not a valid track.
 619  */
 620 static int exp_resolve(int attribute((unused)) nargs,
 621                        char **args,
 622                        struct sink *output,
 623                        void attribute((unused)) *u) {
 624   char *r;
 625
 626   if(dcgi_client && !disorder_resolve(dcgi_client, &r, args[0]))
 627     return sink_writes(output, r) < 0 ? -1 : 0;
 628   return 0;
 629 }
 630
 631 /* @paused
 632  *
 633  * Expands to "true" if the playing track is paused, to "false" if it is
 634  * playing (or if there is no playing track at all).
 635  */
 636 static int exp_paused(int attribute((unused)) nargs,
 637                       char attribute((unused)) **args,
 638                       struct sink *output,
 639                       void attribute((unused)) *u) {
 640   dcgi_lookup(DCGI_PLAYING);
 641   return mx_bool_result(output, (dcgi_playing
 642                                  && dcgi_playing->state == playing_paused));
 643 }
 644
 645 /* @state{ID}@
 646  *
 647  * Expands to the current state of track ID.
 648  */
 649 static int exp_state(int attribute((unused)) nargs,
 650                      char **args,
 651                      struct sink *output,
 652                      void attribute((unused)) *u) {
 653   struct queue_entry *q = dcgi_findtrack(args[0]);
 654
 655   if(q)
 656     return sink_writes(output, playing_states[q->state]) < 0 ? -1 : 0;
 657   return 0;
 658 }
 659
 660 /* @right{RIGHT}{WITH-RIGHT}{WITHOUT-RIGHT}@
 661  *
 662  * Expands to WITH-RIGHT if the current user has right RIGHT, otherwise to
 663  * WITHOUT-RIGHT.  The WITHOUT-RIGHT argument may be left out.
 664  *
 665  * If both WITH-RIGHT and WITHOUT-RIGHT are left out then expands to "true" if
 666  * the user has the right and "false" otherwise.
 667  *
 668  * If there is no connection to the server then expands to nothing (in all
 669  * cases).
 670  */
 671 static int exp_right(int nargs,
 672                      const struct mx_node **args,
 673                      struct sink *output,
 674                      void *u) {
 675   char *right;
 676   rights_type r;
 677   int rc;
 678
 679   if(!dcgi_client)
 680     return 0;
 681   dcgi_lookup(DCGI_RIGHTS);
 682   if((rc = mx_expandstr(args[0], &right, u, "argument #0 (RIGHT)")))
 683     return rc;
 684   if(parse_rights(right, &r, 1/*report*/))
 685     return 0;
 686   /* Single-argument form */
 687   if(nargs == 1)
 688     return mx_bool_result(output, !!(r & dcgi_rights));
 689   /* Multiple argument form */
 690   if(r & dcgi_rights)
 691     return mx_expand(args[1], output, u);
 692   if(nargs == 3)
 693     return mx_expand(args[2], output, u);
 694   return 0;
 695 }
 696
 697 /* @userinfo{PROPERTY}
 698  *
 699  * Expands to the named property of the current user.
 700  */
 701 static int exp_userinfo(int attribute((unused)) nargs,
 702                         char **args,
 703                         struct sink *output,
 704                         void attribute((unused)) *u) {
 705   char *v;
 706
 707   if(dcgi_client
 708      && !disorder_userinfo(dcgi_client, disorder_user(dcgi_client),
 709                            args[0], &v))
 710     return sink_writes(output, v) < 0 ? -1 : 0;
 711   return 0;
 712 }
 713
 714 /* @error
 715  *
 716  * Expands to the latest error string.
 717  */
 718 static int exp_error(int attribute((unused)) nargs,
 719                      char attribute((unused)) **args,
 720                      struct sink *output,
 721                      void attribute((unused)) *u) {
 722   return sink_writes(output, cgi_sgmlquote(dcgi_error_string)) < 0 ? -1 : 0;
 723 }
 724
 725 /** @brief Register DisOrder-specific expansions */
 726 void dcgi_expansions(void) {
 727   mx_register("arg", 1, 1, exp_arg);
 728   mx_register("enabled", 0, 0, exp_enabled);
 729   mx_register("error", 0, 0, exp_error);
 730   mx_register("isnew", 0, 0, exp_isnew);
 731   mx_register("isplaying", 0, 0, exp_isplaying);
 732   mx_register("isplaying", 0, 0, exp_isqueue);
 733   mx_register("isrecent", 0, 0, exp_isrecent);
 734   mx_register("length", 1, 1, exp_length);
 735   mx_register("movable", 1, 1, exp_movable);
 736   mx_register("part", 2, 3, exp_part);
 737   mx_register("paused", 0, 0, exp_paused);
 738   mx_register("pref", 2, 2, exp_pref);
 739   mx_register("quote", 1, 1, exp_quote);
 740   mx_register("random-enabled", 0, 0, exp_random_enabled);
 741   mx_register("removable", 1, 1, exp_removable);
 742   mx_register("resolve", 1, 1, exp_resolve);
 743   mx_register("server-version", 0, 0, exp_server_version);
 744   mx_register("state", 1, 1, exp_state);
 745   mx_register("thisurl", 0, 0, exp_thisurl);
 746   mx_register("trackstate", 1, 1, exp_trackstate);
 747   mx_register("transform", 2, 3, exp_transform);
 748   mx_register("url", 0, 0, exp_url);
 749   mx_register("user", 0, 0, exp_user);
 750   mx_register("userinfo", 1, 1, exp_userinfo);
 751   mx_register("version", 0, 0, exp_version);
 752   mx_register("volume", 1, 1, exp_volume);
 753   mx_register("when", 1, 1, exp_when);
 754   mx_register("who", 1, 1, exp_who);
 755   mx_register_magic("new", 1, 1, exp_new);
 756   mx_register_magic("playing", 0, 1, exp_playing);
 757   mx_register_magic("prefs", 2, 2, exp_prefs);
 758   mx_register_magic("queue", 1, 1, exp_queue);
 759   mx_register_magic("recent", 1, 1, exp_recent);
 760   mx_register_magic("right", 1, 3, exp_right);
 761 }
 762
 763 /*
 764 Local Variables:
 765 c-basic-offset:2
 766 comment-column:40
 767 fill-column:79
 768 indent-tabs-mode:nil
 769 End:
 770 */