Commit | Line | Data |
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460b9539 | 1 | /* |
2 | * This file is part of DisOrder. | |
1020001c | 3 | * Copyright (C) 2006, 2007 Richard Kettlewell |
460b9539 | 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 | */ | |
0e4472a0 | 20 | /** @file lib/eclient.h |
21 | * @brief Client code for event-driven programs | |
22 | */ | |
460b9539 | 23 | |
24 | #ifndef ECLIENT_H | |
25 | #define ECLIENT_H | |
26 | ||
5626f6d2 | 27 | /* Asynchronous client interface */ |
460b9539 | 28 | |
0e4472a0 | 29 | /** @brief Handle type */ |
460b9539 | 30 | typedef struct disorder_eclient disorder_eclient; |
31 | ||
32 | struct queue_entry; | |
33 | ||
0e4472a0 | 34 | /** @brief Set to read from the FD */ |
35 | #define DISORDER_POLL_READ 1u | |
36 | ||
37 | /** @brief Set to write to the FD */ | |
38 | #define DISORDER_POLL_WRITE 2u | |
460b9539 | 39 | |
0e4472a0 | 40 | /** @brief Callbacks for all clients |
41 | * | |
42 | * These must all be valid. | |
43 | */ | |
460b9539 | 44 | typedef struct disorder_eclient_callbacks { |
1f3ce240 | 45 | /** @brief Called when a communication error occurs. |
0e4472a0 | 46 | * @param u from disorder_eclient_new() |
47 | * @param msg error message | |
1f3ce240 RK |
48 | * |
49 | * This might be called at any time, and indicates a low-level error, | |
50 | * e.g. connection refused by the server. It does not mean that any requests | |
51 | * made of the owning eclient will not be fulfilled at some point. | |
0e4472a0 | 52 | */ |
460b9539 | 53 | void (*comms_error)(void *u, const char *msg); |
460b9539 | 54 | |
0e4472a0 | 55 | /** @brief Called when a command fails (including initial authorization). |
56 | * @param u from disorder_eclient_new() | |
57 | * @param v from failed command, or NULL if during setup | |
58 | * @param msg error message | |
1f3ce240 RK |
59 | * |
60 | * This call is obsolete at least in its current form, in which it is used to | |
61 | * report most errors from most requests. Ultimately requests-specific | |
62 | * errors will be reported in a request-specific way rather than via this | |
63 | * generic callback. | |
0e4472a0 | 64 | */ |
460b9539 | 65 | void (*protocol_error)(void *u, void *v, int code, const char *msg); |
0e4472a0 | 66 | |
67 | /** @brief Set poll/select flags | |
68 | * @param u from disorder_eclient_new() | |
69 | * @param c handle | |
70 | * @param fd file descriptor | |
71 | * @param mode bitmap (@ref DISORDER_POLL_READ and/or @ref DISORDER_POLL_WRITE) | |
72 | * | |
73 | * Before @p fd is closed you will always get a call with @p mode = 0. | |
74 | */ | |
460b9539 | 75 | void (*poll)(void *u, disorder_eclient *c, int fd, unsigned mode); |
460b9539 | 76 | |
0e4472a0 | 77 | /** @brief Report current activity |
78 | * @param u from disorder_eclient_new() | |
79 | * @param msg Current activity or NULL | |
80 | * | |
81 | * Called with @p msg = NULL when there's nothing going on. | |
82 | */ | |
460b9539 | 83 | void (*report)(void *u, const char *msg); |
460b9539 | 84 | } disorder_eclient_callbacks; |
85 | ||
0e4472a0 | 86 | /** @brief Callbacks for log clients |
87 | * | |
88 | * All of these are allowed to be a null pointers in which case you don't get | |
89 | * told about that log event. | |
90 | * | |
91 | * See disorder_protocol(5) for full documentation. | |
92 | */ | |
460b9539 | 93 | typedef struct disorder_eclient_log_callbacks { |
0e4472a0 | 94 | /** @brief Called on (re-)connection */ |
460b9539 | 95 | void (*connected)(void *v); |
58d2aad2 RK |
96 | |
97 | /** @brief Called when @p track finished playing successfully */ | |
460b9539 | 98 | void (*completed)(void *v, const char *track); |
58d2aad2 RK |
99 | |
100 | /** @brief Called when @p track fails for some reason */ | |
460b9539 | 101 | void (*failed)(void *v, const char *track, const char *status); |
58d2aad2 RK |
102 | |
103 | /** @brief Called when @p user moves some track or tracks in the queue | |
104 | * | |
105 | * Fetch the queue again to find out what the new order is - the | |
106 | * rearrangement could in principle be arbitrarily complicated. | |
107 | */ | |
460b9539 | 108 | void (*moved)(void *v, const char *user); |
58d2aad2 RK |
109 | |
110 | /** @brief Called when @p track starts playing | |
111 | * | |
112 | * @p user might be 0. | |
113 | */ | |
460b9539 | 114 | void (*playing)(void *v, const char *track, const char *user/*maybe 0*/); |
58d2aad2 RK |
115 | |
116 | /** @brief Called when @p q is added to the queue | |
117 | * | |
118 | * Fetch the queue again to find out where the in the queue it was added. | |
119 | */ | |
460b9539 | 120 | void (*queue)(void *v, struct queue_entry *q); |
58d2aad2 RK |
121 | |
122 | /** @brief Called when @p q is added to the recent list */ | |
460b9539 | 123 | void (*recent_added)(void *v, struct queue_entry *q); |
58d2aad2 RK |
124 | |
125 | /** @brief Called when @p id is removed from the recent list */ | |
460b9539 | 126 | void (*recent_removed)(void *v, const char *id); |
58d2aad2 RK |
127 | |
128 | /** @brief Called when @id is removed from the queue | |
129 | * | |
130 | * @p user might be 0. | |
131 | */ | |
460b9539 | 132 | void (*removed)(void *v, const char *id, const char *user/*maybe 0*/); |
58d2aad2 RK |
133 | |
134 | /** @brief Called when @p track is scratched */ | |
460b9539 | 135 | void (*scratched)(void *v, const char *track, const char *user); |
58d2aad2 RK |
136 | |
137 | /** @brief Called with the current state whenever it changes | |
138 | * | |
139 | * State bits are: | |
140 | * - @ref DISORDER_PLAYING_ENABLED | |
141 | * - @ref DISORDER_RANDOM_ENABLED | |
142 | * - @ref DISORDER_TRACK_PAUSED | |
143 | * - @ref DISORDER_PLAYING | |
144 | * - @ref DISORDER_CONNECTED | |
145 | */ | |
460b9539 | 146 | void (*state)(void *v, unsigned long state); |
58d2aad2 RK |
147 | |
148 | /** @brief Called when the volume changes */ | |
460b9539 | 149 | void (*volume)(void *v, int left, int right); |
58d2aad2 RK |
150 | |
151 | /** @brief Called when a rescan completes */ | |
e025abff | 152 | void (*rescanned)(void *v); |
58d2aad2 RK |
153 | |
154 | /** @brief Called when a user is created (admins only) */ | |
155 | void (*user_add)(void *v, const char *user); | |
156 | ||
157 | /** @brief Called when a user is confirmed (admins only) */ | |
158 | void (*user_confirm)(void *v, const char *user); | |
159 | ||
160 | /** @brief Called when a user is deleted (admins only) */ | |
161 | void (*user_delete)(void *v, const char *user); | |
162 | ||
163 | /** @brief Called when a user is edited (admins only) */ | |
164 | void (*user_edit)(void *v, const char *user, const char *property); | |
460b9539 | 165 | } disorder_eclient_log_callbacks; |
166 | ||
167 | /* State bits */ | |
0e4472a0 | 168 | |
169 | /** @brief Play is enabled */ | |
170 | #define DISORDER_PLAYING_ENABLED 0x00000001 | |
171 | ||
172 | /** @brief Random play is enabled */ | |
173 | #define DISORDER_RANDOM_ENABLED 0x00000002 | |
174 | ||
8f763f1b RK |
175 | /** @brief Track is paused |
176 | * | |
177 | * This is only meaningful if @ref DISORDER_PLAYING is set | |
178 | */ | |
0e4472a0 | 179 | #define DISORDER_TRACK_PAUSED 0x00000004 |
460b9539 | 180 | |
8f763f1b RK |
181 | /** @brief Track is playing |
182 | * | |
183 | * This can be set even if the current track is paused (in which case @ref | |
184 | * DISORDER_TRACK_PAUSED) will also be set. | |
185 | */ | |
186 | #define DISORDER_PLAYING 0x00000008 | |
187 | ||
188 | /** @brief Connected to server | |
189 | * | |
190 | * By connected it is meant that commands have a reasonable chance of being | |
191 | * processed soon, not merely that a TCP connection exists - for instance if | |
192 | * the client is still authenticating then that does not count as connected. | |
193 | */ | |
194 | #define DISORDER_CONNECTED 0x00000010 | |
195 | ||
00959300 RK |
196 | char *disorder_eclient_interpret_state(unsigned long statebits); |
197 | ||
460b9539 | 198 | struct queue_entry; |
199 | struct kvp; | |
200 | struct sink; | |
201 | ||
202 | /* Completion callbacks. These provide the result of operations to the caller. | |
699517af | 203 | * Unlike in earlier releases, these are not allowed to be NULL. */ |
460b9539 | 204 | |
53fa91bb RK |
205 | /** @brief Trivial completion callback |
206 | * @param v User data | |
207 | * @param error Error string or NULL on succes | |
208 | */ | |
209 | typedef void disorder_eclient_no_response(void *v, | |
210 | const char *error); | |
460b9539 | 211 | |
1bd1b63c RK |
212 | /** @brief String result completion callback |
213 | * @param v User data | |
06bfbba4 | 214 | * @param error Error string or NULL on succes |
658c8a35 | 215 | * @param value Result or NULL |
1bd1b63c | 216 | * |
06bfbba4 RK |
217 | * @p error will be NULL on success. In this case @p value will be the result |
218 | * (which might be NULL for disorder_eclient_get(), | |
219 | * disorder_eclient_get_global() and disorder_eclient_userinfo()). | |
220 | * | |
221 | * @p error will be non-NULL on failure. In this case @p value is always NULL. | |
1bd1b63c | 222 | */ |
06bfbba4 RK |
223 | typedef void disorder_eclient_string_response(void *v, |
224 | const char *error, | |
225 | const char *value); | |
460b9539 | 226 | |
658c8a35 RK |
227 | /** @brief String result completion callback |
228 | * @param v User data | |
229 | * @param error Error string or NULL on succes | |
230 | * @param value Result or 0 | |
231 | * | |
232 | * @p error will be NULL on success. In this case @p value will be the result. | |
233 | * | |
234 | * @p error will be non-NULL on failure. In this case @p value is always 0. | |
235 | */ | |
236 | typedef void disorder_eclient_integer_response(void *v, | |
237 | const char *error, | |
238 | long value); | |
699517af RK |
239 | /** @brief Volume completion callback |
240 | * @param v User data | |
241 | * @param error Error string or NULL on success | |
242 | * @param l Left channel volume | |
243 | * @param r Right channel volume | |
244 | * | |
245 | * @p error will be NULL on success. In this case @p l and @p r will be the | |
246 | * result. | |
247 | * | |
248 | * @p error will be non-NULL on failure. In this case @p l and @p r are always | |
249 | * 0. | |
250 | */ | |
251 | typedef void disorder_eclient_volume_response(void *v, | |
252 | const char *error, | |
253 | int l, int r); | |
460b9539 | 254 | |
3035257f RK |
255 | /** @brief Queue request completion callback |
256 | * @param v User data | |
257 | * @param error Error string or NULL on success | |
258 | * @param q Head of queue data list | |
259 | * | |
4190a4d9 RK |
260 | * @p error will be NULL on success. In this case @p q will be the (head of |
261 | * the) result. | |
3035257f RK |
262 | * |
263 | * @p error will be non-NULL on failure. In this case @p q may be NULL but | |
264 | * MIGHT also be some subset of the queue. For consistent behavior it should | |
265 | * be ignored in the error case. | |
266 | */ | |
267 | typedef void disorder_eclient_queue_response(void *v, | |
268 | const char *error, | |
269 | struct queue_entry *q); | |
460b9539 | 270 | |
4190a4d9 RK |
271 | /** @brief List request completion callback |
272 | * @param v User data | |
273 | * @param error Error string or NULL on success | |
274 | * @param nvec Number of elements in response list | |
275 | * @param vec Pointer to response list | |
276 | * | |
277 | * @p error will be NULL on success. In this case @p nvec and @p vec will give | |
278 | * the result. | |
279 | * | |
280 | * @p error will be non-NULL on failure. In this case @p nvec and @p vec will | |
281 | * be 0 and NULL. | |
282 | */ | |
283 | typedef void disorder_eclient_list_response(void *v, | |
284 | const char *error, | |
285 | int nvec, char **vec); | |
460b9539 | 286 | |
287 | disorder_eclient *disorder_eclient_new(const disorder_eclient_callbacks *cb, | |
288 | void *u); | |
289 | /* Create a new client */ | |
290 | ||
291 | void disorder_eclient_close(disorder_eclient *c); | |
292 | /* Close C */ | |
293 | ||
8f763f1b | 294 | unsigned long disorder_eclient_state(const disorder_eclient *c); |
ad58ebcc | 295 | |
460b9539 | 296 | void disorder_eclient_polled(disorder_eclient *c, unsigned mode); |
297 | /* Should be called when c's FD is readable and/or writable, and in any case | |
298 | * from time to time (so that retries work). */ | |
299 | ||
300 | int disorder_eclient_version(disorder_eclient *c, | |
301 | disorder_eclient_string_response *completed, | |
302 | void *v); | |
303 | /* fetch the server version */ | |
304 | ||
305 | int disorder_eclient_play(disorder_eclient *c, | |
306 | const char *track, | |
307 | disorder_eclient_no_response *completed, | |
308 | void *v); | |
309 | /* add a track to the queue */ | |
310 | ||
311 | int disorder_eclient_pause(disorder_eclient *c, | |
312 | disorder_eclient_no_response *completed, | |
313 | void *v); | |
314 | /* add a track to the queue */ | |
315 | ||
316 | int disorder_eclient_resume(disorder_eclient *c, | |
317 | disorder_eclient_no_response *completed, | |
318 | void *v); | |
319 | /* add a track to the queue */ | |
320 | ||
321 | int disorder_eclient_scratch(disorder_eclient *c, | |
322 | const char *id, | |
323 | disorder_eclient_no_response *completed, | |
324 | void *v); | |
325 | /* scratch a track by ID */ | |
326 | ||
327 | int disorder_eclient_scratch_playing(disorder_eclient *c, | |
328 | disorder_eclient_no_response *completed, | |
329 | void *v); | |
330 | /* scratch the playing track whatever it is */ | |
331 | ||
332 | int disorder_eclient_remove(disorder_eclient *c, | |
333 | const char *id, | |
334 | disorder_eclient_no_response *completed, | |
335 | void *v); | |
336 | /* remove a track from the queue */ | |
337 | ||
338 | int disorder_eclient_moveafter(disorder_eclient *c, | |
339 | const char *target, | |
340 | int nids, | |
341 | const char **ids, | |
342 | disorder_eclient_no_response *completed, | |
343 | void *v); | |
344 | /* move tracks within the queue */ | |
345 | ||
346 | int disorder_eclient_playing(disorder_eclient *c, | |
347 | disorder_eclient_queue_response *completed, | |
348 | void *v); | |
349 | /* find the currently playing track (0 for none) */ | |
350 | ||
351 | int disorder_eclient_queue(disorder_eclient *c, | |
352 | disorder_eclient_queue_response *completed, | |
353 | void *v); | |
354 | /* list recently played tracks */ | |
355 | ||
356 | int disorder_eclient_recent(disorder_eclient *c, | |
357 | disorder_eclient_queue_response *completed, | |
358 | void *v); | |
359 | /* list recently played tracks */ | |
360 | ||
361 | int disorder_eclient_files(disorder_eclient *c, | |
362 | disorder_eclient_list_response *completed, | |
363 | const char *dir, | |
364 | const char *re, | |
365 | void *v); | |
366 | /* list files in a directory, matching RE if not a null pointer */ | |
367 | ||
368 | int disorder_eclient_dirs(disorder_eclient *c, | |
369 | disorder_eclient_list_response *completed, | |
370 | const char *dir, | |
371 | const char *re, | |
372 | void *v); | |
373 | /* list directories in a directory, matching RE if not a null pointer */ | |
374 | ||
375 | int disorder_eclient_namepart(disorder_eclient *c, | |
376 | disorder_eclient_string_response *completed, | |
377 | const char *track, | |
378 | const char *context, | |
379 | const char *part, | |
380 | void *v); | |
381 | /* look up a track name part */ | |
382 | ||
383 | int disorder_eclient_length(disorder_eclient *c, | |
384 | disorder_eclient_integer_response *completed, | |
385 | const char *track, | |
386 | void *v); | |
387 | /* look up a track name length */ | |
388 | ||
389 | int disorder_eclient_volume(disorder_eclient *c, | |
390 | disorder_eclient_volume_response *callback, | |
391 | int l, int r, | |
392 | void *v); | |
393 | /* If L and R are both -ve gets the volume. | |
394 | * If neither are -ve then sets the volume. | |
395 | * Otherwise asserts! | |
396 | */ | |
397 | ||
398 | int disorder_eclient_enable(disorder_eclient *c, | |
399 | disorder_eclient_no_response *callback, | |
400 | void *v); | |
401 | int disorder_eclient_disable(disorder_eclient *c, | |
402 | disorder_eclient_no_response *callback, | |
403 | void *v); | |
404 | int disorder_eclient_random_enable(disorder_eclient *c, | |
405 | disorder_eclient_no_response *callback, | |
406 | void *v); | |
407 | int disorder_eclient_random_disable(disorder_eclient *c, | |
408 | disorder_eclient_no_response *callback, | |
409 | void *v); | |
410 | /* Enable/disable play/random play */ | |
411 | ||
412 | int disorder_eclient_resolve(disorder_eclient *c, | |
413 | disorder_eclient_string_response *completed, | |
414 | const char *track, | |
415 | void *v); | |
416 | /* Resolve aliases */ | |
417 | ||
418 | int disorder_eclient_log(disorder_eclient *c, | |
419 | const disorder_eclient_log_callbacks *callbacks, | |
420 | void *v); | |
421 | /* Make this a log client (forever - it automatically becomes one again upon | |
422 | * reconnection) */ | |
423 | ||
424 | int disorder_eclient_get(disorder_eclient *c, | |
425 | disorder_eclient_string_response *completed, | |
426 | const char *track, const char *pref, | |
427 | void *v); | |
428 | int disorder_eclient_set(disorder_eclient *c, | |
429 | disorder_eclient_no_response *completed, | |
430 | const char *track, const char *pref, | |
431 | const char *value, | |
432 | void *v); | |
433 | int disorder_eclient_unset(disorder_eclient *c, | |
434 | disorder_eclient_no_response *completed, | |
435 | const char *track, const char *pref, | |
436 | void *v); | |
437 | /* Get/set preference values */ | |
438 | ||
439 | int disorder_eclient_search(disorder_eclient *c, | |
440 | disorder_eclient_list_response *completed, | |
441 | const char *terms, | |
442 | void *v); | |
443 | ||
7858930d | 444 | int disorder_eclient_nop(disorder_eclient *c, |
445 | disorder_eclient_no_response *completed, | |
446 | void *v); | |
447 | ||
2a10b70b RK |
448 | int disorder_eclient_new_tracks(disorder_eclient *c, |
449 | disorder_eclient_list_response *completed, | |
450 | int max, | |
451 | void *v); | |
a99c4e9a RK |
452 | |
453 | int disorder_eclient_rtp_address(disorder_eclient *c, | |
454 | disorder_eclient_list_response *completed, | |
455 | void *v); | |
456 | ||
ffc4dbaf RK |
457 | int disorder_eclient_users(disorder_eclient *c, |
458 | disorder_eclient_list_response *completed, | |
459 | void *v); | |
4aa8a0a4 RK |
460 | int disorder_eclient_deluser(disorder_eclient *c, |
461 | disorder_eclient_no_response *completed, | |
462 | const char *user, | |
463 | void *v); | |
e61aef23 RK |
464 | int disorder_eclient_userinfo(disorder_eclient *c, |
465 | disorder_eclient_string_response *completed, | |
466 | const char *user, | |
467 | const char *property, | |
468 | void *v); | |
469 | int disorder_eclient_edituser(disorder_eclient *c, | |
470 | disorder_eclient_no_response *completed, | |
471 | const char *user, | |
472 | const char *property, | |
473 | const char *value, | |
474 | void *v); | |
0d719587 RK |
475 | int disorder_eclient_adduser(disorder_eclient *c, |
476 | disorder_eclient_no_response *completed, | |
477 | const char *user, | |
478 | const char *password, | |
479 | const char *rights, | |
480 | void *v); | |
ffc4dbaf | 481 | |
460b9539 | 482 | #endif |
483 | ||
484 | /* | |
485 | Local Variables: | |
486 | c-basic-offset:2 | |
487 | comment-column:40 | |
488 | fill-column:79 | |
489 | indent-tabs-mode:nil | |
490 | End: | |
491 | */ |