| 1 | /* |
| 2 | * This file is part of DisOrder. |
| 3 | * Copyright (C) 2006, 2007 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 lib/eclient.h |
| 21 | * @brief Client code for event-driven programs |
| 22 | */ |
| 23 | |
| 24 | #ifndef ECLIENT_H |
| 25 | #define ECLIENT_H |
| 26 | |
| 27 | /* Asynchronous client interface */ |
| 28 | |
| 29 | /** @brief Handle type */ |
| 30 | typedef struct disorder_eclient disorder_eclient; |
| 31 | |
| 32 | struct queue_entry; |
| 33 | |
| 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 |
| 39 | |
| 40 | /** @brief Callbacks for all clients |
| 41 | * |
| 42 | * These must all be valid. |
| 43 | */ |
| 44 | typedef struct disorder_eclient_callbacks { |
| 45 | /** @brief Called when a communication error (e.g. connected refused) occurs. |
| 46 | * @param u from disorder_eclient_new() |
| 47 | * @param msg error message |
| 48 | */ |
| 49 | void (*comms_error)(void *u, const char *msg); |
| 50 | |
| 51 | /** @brief Called when a command fails (including initial authorization). |
| 52 | * @param u from disorder_eclient_new() |
| 53 | * @param v from failed command, or NULL if during setup |
| 54 | * @param msg error message |
| 55 | */ |
| 56 | void (*protocol_error)(void *u, void *v, int code, const char *msg); |
| 57 | |
| 58 | /** @brief Set poll/select flags |
| 59 | * @param u from disorder_eclient_new() |
| 60 | * @param c handle |
| 61 | * @param fd file descriptor |
| 62 | * @param mode bitmap (@ref DISORDER_POLL_READ and/or @ref DISORDER_POLL_WRITE) |
| 63 | * |
| 64 | * Before @p fd is closed you will always get a call with @p mode = 0. |
| 65 | */ |
| 66 | void (*poll)(void *u, disorder_eclient *c, int fd, unsigned mode); |
| 67 | |
| 68 | /** @brief Report current activity |
| 69 | * @param u from disorder_eclient_new() |
| 70 | * @param msg Current activity or NULL |
| 71 | * |
| 72 | * Called with @p msg = NULL when there's nothing going on. |
| 73 | */ |
| 74 | void (*report)(void *u, const char *msg); |
| 75 | } disorder_eclient_callbacks; |
| 76 | |
| 77 | /** @brief Callbacks for log clients |
| 78 | * |
| 79 | * All of these are allowed to be a null pointers in which case you don't get |
| 80 | * told about that log event. |
| 81 | * |
| 82 | * See disorder_protocol(5) for full documentation. |
| 83 | */ |
| 84 | typedef struct disorder_eclient_log_callbacks { |
| 85 | /** @brief Called on (re-)connection */ |
| 86 | void (*connected)(void *v); |
| 87 | |
| 88 | void (*completed)(void *v, const char *track); |
| 89 | void (*failed)(void *v, const char *track, const char *status); |
| 90 | void (*moved)(void *v, const char *user); |
| 91 | void (*playing)(void *v, const char *track, const char *user/*maybe 0*/); |
| 92 | void (*queue)(void *v, struct queue_entry *q); |
| 93 | void (*recent_added)(void *v, struct queue_entry *q); |
| 94 | void (*recent_removed)(void *v, const char *id); |
| 95 | void (*removed)(void *v, const char *id, const char *user/*maybe 0*/); |
| 96 | void (*scratched)(void *v, const char *track, const char *user); |
| 97 | void (*state)(void *v, unsigned long state); |
| 98 | void (*volume)(void *v, int left, int right); |
| 99 | void (*rescanned)(void *v); |
| 100 | } disorder_eclient_log_callbacks; |
| 101 | |
| 102 | /* State bits */ |
| 103 | |
| 104 | /** @brief Play is enabled */ |
| 105 | #define DISORDER_PLAYING_ENABLED 0x00000001 |
| 106 | |
| 107 | /** @brief Random play is enabled */ |
| 108 | #define DISORDER_RANDOM_ENABLED 0x00000002 |
| 109 | |
| 110 | /** @brief Track is paused |
| 111 | * |
| 112 | * This is only meaningful if @ref DISORDER_PLAYING is set |
| 113 | */ |
| 114 | #define DISORDER_TRACK_PAUSED 0x00000004 |
| 115 | |
| 116 | /** @brief Track is playing |
| 117 | * |
| 118 | * This can be set even if the current track is paused (in which case @ref |
| 119 | * DISORDER_TRACK_PAUSED) will also be set. |
| 120 | */ |
| 121 | #define DISORDER_PLAYING 0x00000008 |
| 122 | |
| 123 | /** @brief Connected to server |
| 124 | * |
| 125 | * By connected it is meant that commands have a reasonable chance of being |
| 126 | * processed soon, not merely that a TCP connection exists - for instance if |
| 127 | * the client is still authenticating then that does not count as connected. |
| 128 | */ |
| 129 | #define DISORDER_CONNECTED 0x00000010 |
| 130 | |
| 131 | char *disorder_eclient_interpret_state(unsigned long statebits); |
| 132 | |
| 133 | struct queue_entry; |
| 134 | struct kvp; |
| 135 | struct sink; |
| 136 | |
| 137 | /* Completion callbacks. These provide the result of operations to the caller. |
| 138 | * It is always allowed for these to be null pointers if you don't care about |
| 139 | * the result. */ |
| 140 | |
| 141 | typedef void disorder_eclient_no_response(void *v); |
| 142 | /* completion callback with no data */ |
| 143 | |
| 144 | typedef void disorder_eclient_string_response(void *v, const char *value); |
| 145 | /* completion callback with a string result */ |
| 146 | |
| 147 | typedef void disorder_eclient_integer_response(void *v, long value); |
| 148 | /* completion callback with a integer result */ |
| 149 | |
| 150 | typedef void disorder_eclient_volume_response(void *v, int l, int r); |
| 151 | /* completion callback with a pair of integer results */ |
| 152 | |
| 153 | typedef void disorder_eclient_queue_response(void *v, struct queue_entry *q); |
| 154 | /* completion callback for queue/recent listing */ |
| 155 | |
| 156 | typedef void disorder_eclient_list_response(void *v, int nvec, char **vec); |
| 157 | /* completion callback for file listing etc */ |
| 158 | |
| 159 | disorder_eclient *disorder_eclient_new(const disorder_eclient_callbacks *cb, |
| 160 | void *u); |
| 161 | /* Create a new client */ |
| 162 | |
| 163 | void disorder_eclient_close(disorder_eclient *c); |
| 164 | /* Close C */ |
| 165 | |
| 166 | unsigned long disorder_eclient_state(const disorder_eclient *c); |
| 167 | |
| 168 | void disorder_eclient_polled(disorder_eclient *c, unsigned mode); |
| 169 | /* Should be called when c's FD is readable and/or writable, and in any case |
| 170 | * from time to time (so that retries work). */ |
| 171 | |
| 172 | int disorder_eclient_version(disorder_eclient *c, |
| 173 | disorder_eclient_string_response *completed, |
| 174 | void *v); |
| 175 | /* fetch the server version */ |
| 176 | |
| 177 | int disorder_eclient_play(disorder_eclient *c, |
| 178 | const char *track, |
| 179 | disorder_eclient_no_response *completed, |
| 180 | void *v); |
| 181 | /* add a track to the queue */ |
| 182 | |
| 183 | int disorder_eclient_pause(disorder_eclient *c, |
| 184 | disorder_eclient_no_response *completed, |
| 185 | void *v); |
| 186 | /* add a track to the queue */ |
| 187 | |
| 188 | int disorder_eclient_resume(disorder_eclient *c, |
| 189 | disorder_eclient_no_response *completed, |
| 190 | void *v); |
| 191 | /* add a track to the queue */ |
| 192 | |
| 193 | int disorder_eclient_scratch(disorder_eclient *c, |
| 194 | const char *id, |
| 195 | disorder_eclient_no_response *completed, |
| 196 | void *v); |
| 197 | /* scratch a track by ID */ |
| 198 | |
| 199 | int disorder_eclient_scratch_playing(disorder_eclient *c, |
| 200 | disorder_eclient_no_response *completed, |
| 201 | void *v); |
| 202 | /* scratch the playing track whatever it is */ |
| 203 | |
| 204 | int disorder_eclient_remove(disorder_eclient *c, |
| 205 | const char *id, |
| 206 | disorder_eclient_no_response *completed, |
| 207 | void *v); |
| 208 | /* remove a track from the queue */ |
| 209 | |
| 210 | int disorder_eclient_moveafter(disorder_eclient *c, |
| 211 | const char *target, |
| 212 | int nids, |
| 213 | const char **ids, |
| 214 | disorder_eclient_no_response *completed, |
| 215 | void *v); |
| 216 | /* move tracks within the queue */ |
| 217 | |
| 218 | int disorder_eclient_playing(disorder_eclient *c, |
| 219 | disorder_eclient_queue_response *completed, |
| 220 | void *v); |
| 221 | /* find the currently playing track (0 for none) */ |
| 222 | |
| 223 | int disorder_eclient_queue(disorder_eclient *c, |
| 224 | disorder_eclient_queue_response *completed, |
| 225 | void *v); |
| 226 | /* list recently played tracks */ |
| 227 | |
| 228 | int disorder_eclient_recent(disorder_eclient *c, |
| 229 | disorder_eclient_queue_response *completed, |
| 230 | void *v); |
| 231 | /* list recently played tracks */ |
| 232 | |
| 233 | int disorder_eclient_files(disorder_eclient *c, |
| 234 | disorder_eclient_list_response *completed, |
| 235 | const char *dir, |
| 236 | const char *re, |
| 237 | void *v); |
| 238 | /* list files in a directory, matching RE if not a null pointer */ |
| 239 | |
| 240 | int disorder_eclient_dirs(disorder_eclient *c, |
| 241 | disorder_eclient_list_response *completed, |
| 242 | const char *dir, |
| 243 | const char *re, |
| 244 | void *v); |
| 245 | /* list directories in a directory, matching RE if not a null pointer */ |
| 246 | |
| 247 | int disorder_eclient_namepart(disorder_eclient *c, |
| 248 | disorder_eclient_string_response *completed, |
| 249 | const char *track, |
| 250 | const char *context, |
| 251 | const char *part, |
| 252 | void *v); |
| 253 | /* look up a track name part */ |
| 254 | |
| 255 | int disorder_eclient_length(disorder_eclient *c, |
| 256 | disorder_eclient_integer_response *completed, |
| 257 | const char *track, |
| 258 | void *v); |
| 259 | /* look up a track name length */ |
| 260 | |
| 261 | int disorder_eclient_volume(disorder_eclient *c, |
| 262 | disorder_eclient_volume_response *callback, |
| 263 | int l, int r, |
| 264 | void *v); |
| 265 | /* If L and R are both -ve gets the volume. |
| 266 | * If neither are -ve then sets the volume. |
| 267 | * Otherwise asserts! |
| 268 | */ |
| 269 | |
| 270 | int disorder_eclient_enable(disorder_eclient *c, |
| 271 | disorder_eclient_no_response *callback, |
| 272 | void *v); |
| 273 | int disorder_eclient_disable(disorder_eclient *c, |
| 274 | disorder_eclient_no_response *callback, |
| 275 | void *v); |
| 276 | int disorder_eclient_random_enable(disorder_eclient *c, |
| 277 | disorder_eclient_no_response *callback, |
| 278 | void *v); |
| 279 | int disorder_eclient_random_disable(disorder_eclient *c, |
| 280 | disorder_eclient_no_response *callback, |
| 281 | void *v); |
| 282 | /* Enable/disable play/random play */ |
| 283 | |
| 284 | int disorder_eclient_resolve(disorder_eclient *c, |
| 285 | disorder_eclient_string_response *completed, |
| 286 | const char *track, |
| 287 | void *v); |
| 288 | /* Resolve aliases */ |
| 289 | |
| 290 | int disorder_eclient_log(disorder_eclient *c, |
| 291 | const disorder_eclient_log_callbacks *callbacks, |
| 292 | void *v); |
| 293 | /* Make this a log client (forever - it automatically becomes one again upon |
| 294 | * reconnection) */ |
| 295 | |
| 296 | int disorder_eclient_get(disorder_eclient *c, |
| 297 | disorder_eclient_string_response *completed, |
| 298 | const char *track, const char *pref, |
| 299 | void *v); |
| 300 | int disorder_eclient_set(disorder_eclient *c, |
| 301 | disorder_eclient_no_response *completed, |
| 302 | const char *track, const char *pref, |
| 303 | const char *value, |
| 304 | void *v); |
| 305 | int disorder_eclient_unset(disorder_eclient *c, |
| 306 | disorder_eclient_no_response *completed, |
| 307 | const char *track, const char *pref, |
| 308 | void *v); |
| 309 | /* Get/set preference values */ |
| 310 | |
| 311 | int disorder_eclient_search(disorder_eclient *c, |
| 312 | disorder_eclient_list_response *completed, |
| 313 | const char *terms, |
| 314 | void *v); |
| 315 | |
| 316 | int disorder_eclient_nop(disorder_eclient *c, |
| 317 | disorder_eclient_no_response *completed, |
| 318 | void *v); |
| 319 | |
| 320 | int disorder_eclient_new_tracks(disorder_eclient *c, |
| 321 | disorder_eclient_list_response *completed, |
| 322 | int max, |
| 323 | void *v); |
| 324 | #endif |
| 325 | |
| 326 | /* |
| 327 | Local Variables: |
| 328 | c-basic-offset:2 |
| 329 | comment-column:40 |
| 330 | fill-column:79 |
| 331 | indent-tabs-mode:nil |
| 332 | End: |
| 333 | */ |